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A Design and Implementation of Active NetworkSocket ProgrammingK.L. Eddie Law, Roy LeungThe Edward S. Rogers Sr. Department of Electrical and Computer EngineeringUniversity of TorontoToronto, Canadaeddie@, roy.leung@utoronto.caAbstract—The concept of programmable nodes and active networks introduces programmability into communication networks. Code and data can be sent and modified on their ways to destinations. Recently, various research groups have designed and implemented their own design platforms. Each design has its own benefits and drawbacks. Moreover, there exists an interoperability problem among platforms. As a result, we introduce a concept that is similar to the network socket programming. We intentionally establish a set of simple interfaces for programming active applications. This set of interfaces, known as Active Network Socket Programming (ANSP), will be working on top of all other execution environments in future. Therefore, the ANSP offers a concept that is similar to “write once, run everywhere.” It is an open programming model that active applications can work on all execution environments. It solves the heterogeneity within active networks. This is especially useful when active applications need to access all regions within a heterogeneous network to deploy special service at critical points or to monitor the performance of the entire networks. Instead of introducing a new platform, our approach provides a thin, transparent layer on top of existing environments that can be easily installed for all active applications.Keywords-active networks; application programming interface; active network socket programming;I. I NTRODUCTIONIn 1990, Clark and Tennenhouse [1] proposed a design framework for introducing new network protocols for the Internet. Since the publication of that position paper, active network design framework [2, 3, 10] has slowly taken shape in the late 1990s. The active network paradigm allows program code and data to be delivered simultaneously on the Internet. Moreover, they may get executed and modified on their ways to their destinations. At the moment, there is a global active network backbone, the ABone, for experiments on active networks. Apart from the immaturity of the executing platform, the primary hindrance on the deployment of active networks on the Internet is more on the commercially related issues. For example, a vendor may hesitate to allow network routers to run some unknown programs that may affect their expected routing performance. As a result, alternatives were proposed to allow active network concept to operate on the Internet, such as the application layer active networking (ALAN) project [4] from the European research community. In the ALAN project, there are active server systems located at different places in the networks and active applications are allowed to run in these servers at the application layer. Another potential approach from the network service provider is to offer active network service as the premium service class in the networks. This service class should provide the best Quality of Service (QoS), and allow the access of computing facility in routers. With this approach, the network service providers can create a new source of income.The research in active networks has been progressing steadily. Since active networks introduce programmability on the Internet, appropriate executing platforms for the active applications to execute should be established. These operating platforms are known as execution environments (EEs) and a few of them have been created, e.g., the Active Signaling Protocol (ASP) [12] and the Active Network Transport System (ANTS) [11]. Hence, different active applications can be implemented to test the active networking concept.With these EEs, some experiments have been carried out to examine the active network concept, for example, the mobile networks [5], web proxies [6], and multicast routers [7]. Active networks introduce a lot of program flexibility and extensibility in networks. Several research groups have proposed various designs of execution environments to offer network computation within routers. Their performance and potential benefits to existing infrastructure are being evaluated [8, 9]. Unfortunately, they seldom concern the interoperability problems when the active networks consist of multiple execution environments. For example, there are three EEs in ABone. Active applications written for one particular EE cannot be operated on other platforms. This introduces another problem of resources partitioning for different EEs to operate. Moreover, there are always some critical network applications that need to run under all network routers, such as collecting information and deploying service at critical points to monitor the networks.In this paper, a framework known as Active Network Socket Programming (ANSP) model is proposed to work with all EEs. It offers the following primary objectives.• One single programming interface is introduced for writing active applications.• Since ANSP offers the programming interface, the design of EE can be made independent of the ANSP.This enables a transparency in developing andenhancing future execution environments.• ANSP addresses the interoperability issues among different execution environments.• Through the design of ANSP, the pros and cons of different EEs will be gained. This may help design abetter EE with improved performance in future.The primary objective of the ANSP is to enable all active applications that are written in ANSP can operate in the ABone testbed . While the proposed ANSP framework is essential in unifying the network environments, we believe that the availability of different environments is beneficial in the development of a better execution environment in future. ANSP is not intended to replace all existing environments, but to enable the studies of new network services which are orthogonal to the designs of execution environments. Therefore, ANSP is designed to be a thin and transparent layer on top of all execution environments. Currently, its deployment relies on automatic code loading with the underlying environments. As a result, the deployment of ANSP at a router is optional and does not require any change to the execution environments.II. D ESIGN I SSUES ON ANSPThe ANSP unifies existing programming interfaces among all EEs. Conceptually, the design of ANSP is similar to the middleware design that offers proper translation mechanisms to different EEs. The provisioning of a unified interface is only one part of the whole ANSP platform. There are many other issues that need to be considered. Apart from translating a set of programming interfaces to other executable calls in different EEs, there are other design issues that should be covered, e.g., • a unified thread library handles thread operations regardless of the thread libraries used in the EEs;• a global soft-store allows information sharing among capsules that may execute over different environmentsat a given router;• a unified addressing scheme used across different environments; more importantly, a routing informationexchange mechanism should be designed across EEs toobtain a global view of the unified networks;• a programming model that should be independent to any programming languages in active networks;• and finally, a translation mechanism to hide the heterogeneity of capsule header structures.A. Heterogeneity in programming modelEach execution environment provides various abstractions for its services and resources in the form of program calls. The model consists of a set of well-defined components, each of them has its own programming interfaces. For the abstractions, capsule-based programming model [10] is the most popular design in active networks. It is used in ANTS [11] and ASP [12], and they are being supported in ABone. Although they are developed based on the same capsule model, their respective components and interfaces are different. Therefore, programs written in one EE cannot run in anther EE. The conceptual views of the programming models in ANTS and ASP are shown in Figure 1.There are three distinct components in ANTS: application, capsule, and execution environment. There exist user interfaces for the active applications at only the source and destination routers. Then the users can specify their customized actions to the networks. According to the program function, the applications send one or more capsules to carry out the operations. Both applications and capsules operate on top of an execution environment that exports an interface to its internal programming resources. Capsule executes its program at each router it has visited. When it arrives at its destination, the application at destination may either reply it with another capsule or presents this arrival event to the user. One drawback with ANTS is that it only allows “bootstrap” application.Figure 1. Programming Models in ASP and ANTS.In contrast, ASP does not limit its users to run “bootstrap” applications. Its program interfaces are different from ANTS, but there are also has three components in ASP: application client, environment, and AAContext. The application client can run on active or non-active host. It can start an active application by simply sending a request message to the EE. The client presents information to users and allows its users to trigger actions at a nearby active router. AAContext is the core of the network service and its specification is divided into two parts. One part specifies its actions at its source and destination routers. Its role is similar to that of the application in ANTS, except that it does not provide a direct interface with the user. The other part defines its actions when it runs inside the active networks and it is similar to the functional behaviors of a capsule in ANTS.In order to deal with the heterogeneity of these two models, ANSP needs to introduce a new set of programming interfaces and map its interfaces and execution model to those within the routers’ EEs.B. Unified Thread LibraryEach execution environment must ensure the isolation of instance executions, so they do not affect each other or accessThe authors appreciate the Nortel Institute for Telecommunications (NIT) at the University of Toronto to allow them to access the computing facilitiesothers’ information. There are various ways to enforce the access control. One simple way is to have one virtual machine for one instance of active applications. This relies on the security design in the virtual machines to isolate services. ANTS is one example that is using this method. Nevertheless, the use of multiple virtual machines requires relatively large amount of resources and may be inefficient in some cases. Therefore, certain environments, such as ASP, allow network services to run within a virtual machine but restrict the use of their services to a limited set of libraries in their packages. For instance, ASP provides its thread library to enforce access control. Because of the differences in these types of thread mechanism, ANSP devises a new thread library to allow uniform accesses to different thread mechanisms.C. Soft-StoreSoft-store allows capsule to insert and retrieve information at a router, thus allowing more than one capsules to exchange information within a network. However, problem arises when a network service can execute under different environments within a router. The problem occurs especially when a network service inserts its soft-store information in one environment and retrieves its data at a later time in another environment at the same router. Due to the fact that execution environments are not allowed to exchange information, the network service cannot retrieve its previous data. Therefore, our ANSP framework needs to take into account of this problem and provides soft-store mechanism that allows universal access of its data at each router.D. Global View of a Unified NetworkWhen an active application is written with ANSP, it can execute on different environment seamlessly. The previously smaller and partitioned networks based on different EEs can now be merging into one large active network. It is then necessary to advise the network topology across the networks. However, different execution environments have different addressing schemes and proprietary routing protocols. In order to merge these partitions together, ANSP must provide a new unified addressing scheme. This new scheme should be interpretable by any environments through appropriate translations with the ANSP. Upon defining the new addressing scheme, a new routing protocol should be designed to operate among environments to exchange topology information. This allows each environment in a network to have a complete view of its network topology.E. Language-Independent ModelExecution environment can be programmed in any programming language. One of the most commonly used languages is Java [13] due to its dynamic code loading capability. In fact, both ANTS and ASP are developed in Java. Nevertheless, the active network architecture shown in Figure 2 does not restrict the use of additional environments that are developed in other languages. For instance, the active network daemon, anted, in Abone provides a workspace to execute multiple execution environments within a router. PLAN, for example, is implemented in Ocaml that will be deployable on ABone in future. Although the current active network is designed to deploy multiple environments that can be in any programming languages, there lacks the tool to allow active applications to run seamlessly upon these environments. Hence, one of the issues that ANSP needs to address is to design a programming model that can work with different programming languages. Although our current prototype only considers ANTS and ASP in its design, PLAN will be the next target to address the programming language issue and to improve the design of ANSP.Figure 2. ANSP Framework Model.F. Heterogeneity of Capsule Header StructureThe structures of the capsule headers are different in different EEs. They carries capsule-related information, for example, the capsule types, sources and destinations. This information is important when certain decision needs to be made within its target environment. A unified model should allow its program code to be executed on different environments. However, the capsule header prevents different environments to interpret its information successfully. Therefore, ANSP should carry out appropriate translation to the header information before the target environment receives this capsule.III. ANSP P ROGRAMMING M ODELWe have outlined the design issues encountered with the ANSP. In the following, the design of the programming model in ANSP will be discussed. This proposed framework provides a set of unified programming interfaces that allows active applications to work on all execution environments. The framework is shown in Figure 2. It is composed of two layers integrated within the active network architecture. These two layers can operate independently without the other layer. The upper layer provides a unified programming model to active applications. The lower layer provides appropriate translation procedure to the ANSP applications when it is processed by different environments. This service is necessary because each environment has its own header definition.The ANSP framework provides a set of programming calls which are abstractions of ANSP services and resources. A capsule-based model is used for ANSP, and it is currently extended to map to other capsule-based models used in ANTSand ASP. The mapping possibility to other models remains as our future works. Hence, the mapping technique in ANSP allows any ANSP applications to access the same programming resources in different environments through a single set of interfaces. The mapping has to be done in a consistent and transparent manner. Therefore, the ANSP appears as an execution environment that provides a complete set of functionalities to active applications. While in fact, it is an overlay structure that makes use of the services provided from the underlying environments. In the following, the high-level functional descriptions of the ANSP model are described. Then, the implementations will be discussed. The ANSP programming model is based upon the interactions between four components: application client , application stub , capsule , and active service base.Figure 3. Information Flow with the ANSP.•Application Client : In a typical scenario, an active application requires some means to present information to its users, e.g., the state of the networks. A graphical user interface (GUI) is designed to operate with the application client if the ANSP runs on a non-active host.•Application Stub : When an application starts, it activates the application client to create a new instance of application stub at its near-by active node. There are two responsibilities for the application stub. One of them is to receive users’ instructions from the application client. Another one is to receive incoming capsules from networks and to perform appropriate actions. Typically, there are two types of actions, thatare, to reply or relay in capsules through the networks, or to notify the users regarding the incoming capsule. •Capsule : An active application may contain several capsule types. Each of them carries program code (also referred to as forwarding routine). Since the application defines a protocol to specify the interactions among capsules as well as the application stubs. Every capsule executes its forwarding routine at each router it visits along the path between the source and destination.•Active Service Base : An active service base is designed to export routers’ environments’ services and execute program calls from application stubs and capsules from different EEs. The base is loaded automatically at each router whenever a capsule arrives.The interactions among components within ANSP are shown in Figure 3. The designs of some key components in the ANSP will be discussed in the following subsections. A. Capsule (ANSPCapsule)ANSPXdr decode () ANSPXdr encode () int length ()Boolean execute ()New types of capsule are created by extending the abstract class ANSPCapsule . New extensions are required to define their own forwarding routines as well as their serialization procedures. These methods are indicated below:The execution of a capsule in ANSP is listed below. It is similar to the process in ANTS.1. A capsule is in serial binary representation before it issent to the network. When an active router receives a byte sequence, it invokes decode() to convert the sequence into a capsule. 2. The router invokes the forwarding routine of thecapsule, execute(). 3. When the capsule has finished its job and forwardsitself to its next hop by calling send(), this call implicitly invokes encode() to convert the capsule into a new serial byte representation. length() isused inside the call of encode() to determine the length of the resulting byte sequence. ANSP provides a XDR library called ANSPXdr to ease the jobs of encoding and decoding.B. Active Service Base (ANSPBase)In an active node, the Active Service Base provides a unified interface to export the available resources in EEs for the rest of the ANSP components. The services may include thread management, node query, and soft-store operation, as shown in Table 1.TABLE I. ACTIVE SERVICE BASE FUNCTION CALLSFunction Definition Descriptionboolean send (Capsule, Address) Transmit a capsule towards its destination using the routing table of theunderlying environment.ANSPAddress getLocalHost () Return address of the local host as an ANSPAddress structure. This isuseful when a capsule wants to check its current location.boolean isLocal (ANSPAddress) Return true if its input argument matches the local host’s address andreturn false otherwise.createThread () Create a new thread that is a class ofANSPThreadInterface (discussed later in Section VIA “Unified Thread Abstraction”).putSStore (key, Object) Object getSStore (key) removeSStore (key)The soft-store operations are provided by putSStore(), getSSTore(), and removeSStore(), and they put, retrieve, and remove data respectively. forName (PathName) Supported in ANSP to retrieve a classobject corresponding to the given path name in its argument. This code retrieval may rely on the code loading mechanism in the environment whennecessary.C. Application Client (ANSPClient)boolean start (args[])boolean start (args[],runningEEs) boolean start (args[],startClient)boolean start (args[],startClient, runningEE)Application Client is an interface between users and the nearby active source router. It does the following responsibilities.1. Code registration: It may be necessary to specify thelocation and name of the application code in some execution environments, e.g., ANTS. 2. Application initialization: It includes selecting anexecution environment to execute the application among those are available at the source router. Each active application can create an application client instance by extending the abstract class, ANSPClient . The extension inherits a method, start(), to automatically handle both the registration and initialization processes. All overloaded versions of start() accept a list of arguments, args , that are passed to the application stub during its initialization. An optional argument called runningEEs allows an application client to select a particular set of environment variables, specified by a list of standardized numerical environment ID, the ANEP ID, to perform code registration. If this argument is not specified, the default setting can only include ANTS and ASP. D. Application Stub (ANSPApplication)receive (ANSPCapsule)Application stubs reside at the source and destination routers to initialize the ANSP application after the application clients complete the initialization and registration processes. It is responsible for receiving and serving capsules from the networks as well as actions requested from the clients. A new instance is created by extending the application client abstract class, ANSPApplication . This extension includes the definition of a handling routine called receive(), which is invoked when a stub receives a new capsule.IV. ANSP E XAMPLE : T RACE -R OUTEA testbed has been created to verify the design correctnessof ANSP in heterogeneous environments. There are three types of router setting on this testbed:1. Router that contains ANTS and a ANSP daemonrunning on behalf of ASP; 2. Router that contains ASP and a ANSP daemon thatruns on behalf of ANTS; 3. Router that contains both ASP and ANTS.The prototype is written in Java [11] with a traceroute testing program. The program records the execution environments of all intermediate routers that it has visited between the source and destination. It also measures the RTT between them. Figure 4 shows the GUI from the application client, and it finds three execution environments along the path: ASP, ANTS, and ASP. The execution sequence of the traceroute program is shown in Figure 5.Figure 4. The GUI for the TRACEROUTE Program.The TraceCapsule program code is created byextending the ANSPCapsule abstract class. When execute() starts, it checks the Boolean value of returning to determine if it is returning from the destination. It is set to true if TraceCapsule is traveling back to the source router; otherwise it is false . When traveling towards the destination, TraceCapsule keeps track of the environments and addresses of the routers it has visited in two arrays, path and trace , respectively. When it arrives at a new router, it calls addHop() to append the router address and its environment to these two arrays. When it finally arrives at the destination, it sets returning to false and forwards itself back to the source by calling send().When it returns to source, it invokes deliverToApp() to deliver itself to the application stub that has been running at the source. TraceCapsule carries information in its data field through the networks by executing encode() and decode(), which encapsulates and de-capsulates its data using External Data Representation (XDR) respectively. The syntax of ANSP XDR follows the syntax of XDR library from ANTS. length() in TraceCapsule returns the data length, or it can be calculated by using the primitive types in the XDRlibrary.Figure 5. Flow of the TRACEROUTE Capsules.V. C ONCLUSIONSIn this paper, we present a new unified layered architecture for active networks. The new model is known as Active Network Socket Programming (ANSP). It allows each active application to be written once and run on multiple environments in active networks. Our experiments successfully verify the design of ANSP architecture, and it has been successfully deployed to work harmoniously with ANTS and ASP without making any changes to their architectures. In fact, the unified programming interface layer is light-weighted and can be dynamically deployable upon request.R EFERENCES[1] D.D. Clark, D.L. Tennenhouse, “Architectural Considerations for a NewGeneration of Protocols,” in Proc. ACM Sigcomm’90, pp.200-208, 1990. [2] D. Tennenhouse, J. M. Smith, W. D. Sicoskie, D. J. Wetherall, and G. J.Minden, “A survey of active network research,” IEEE Communications Magazine , pp. 80-86, Jan 1997.[3] D. Wetherall, U. Legedza, and J. Guttag, “Introducing new internetservices: Why and how,” IEEE Network Magazine, July/August 1998. [4] M. Fry, A. Ghosh, “Application Layer Active Networking,” in ComputerNetworks , Vol.31, No.7, pp.655-667, 1999.[5] K. W. Chin, “An Investigation into The Application of Active Networksto Mobile Computing Environments”, Curtin University of Technology, March 2000.[6] S. Bhattacharjee, K. L. Calvert, and E. W. Zegura, “Self OrganizingWide-Area Network Caches”, Proc. IEEE INFOCOM ’98, San Francisco, CA, 29 March-2 April 1998.[7] L. H. Leman, S. J. Garland, and D. L. Tennenhouse, “Active ReliableMulticast”, Proc. IEEE INFOCOM ’98, San Francisco, CA, 29 March-2 April 1998.[8] D. Descasper, G. Parulkar, B. Plattner, “A Scalable, High PerformanceActive Network Node”, In IEEE Network, January/February 1999.[9] E. L. Nygren, S. J. Garland, and M. F. Kaashoek, “PAN: a high-performance active network node supporting multiple mobile code system”, In the Proceedings of the 2nd IEEE Conference on Open Architectures and Network Programming (OpenArch ’99), March 1999. [10] D. L. Tennenhouse, and D. J. Wetherall. “Towards an Active NetworkArchitecture”, In Proceeding of Multimedia Computing and Networking , January 1996.[11] D. J. Wetherall, J. V. Guttag, D. L. Tennenhouse, “ANTS: A toolkit forBuilding and Dynamically Deploying Network Protocols”, Open Architectures and Network Programming, 1998 IEEE , 1998 , Page(s): 117 –129.[12] B. Braden, A. Cerpa, T. Faber, B. Lindell, G. Phillips, and J. Kann.“Introduction to the ASP Execution Environment”: /active-signal/ARP/index.html .[13] “The java language: A white paper,” Tech. Rep., Sun Microsystems,1998.。
毕业设计论文外文文献翻译
毕业设计(论文）外文文献翻译院系：财务与会计学院年级专业：201＊级财务管理姓名:学号：132148*＊*附件: 财务风险管理【Abstract】Although financial risk has increased significantly in recent years risk and risk management are not contemporary issues。
The result of increasingly global markets is that risk may originate with events thousands of miles away that have nothing to do with the domestic market。
Information is available instantaneously which means that change and subsequent market reactions occur very quickly。
The economic climate and markets can be affected very quickly by changes in exchange rates interest rates and commodity prices。
Counterparties can rapidly become problematic。
As a result it is important to ensure financial risks are identified and managed appropriately. Preparation is a key component of risk management。
【Key Words】Financial risk，Risk management，YieldsI. Financial risks arising1.1What Is Risk1.1.1The concept of riskRisk provides the basis for opportunity. The terms risk and exposure have subtle differences in their meaning. Risk refers to the probability of loss while exposure is the possibility of loss although they are often used interchangeably。
服装设计褶皱外文文献翻译最新译文
服装设计褶皱外文文献翻译最新译文The objective of this study is to develop a quantitative method for evaluating the pleat effect on clothing。
as opposed to relying solely on subjective ns。
By analyzing image technology principles。
an image n system was designed to capture images of clothing。
These images were then processed using specialized are to analyze the drape of the clothing。
The study focused specifically on the pleats in the sleeve n of the garment。
analyzing the gray scale curve of the sleeve image and the corresponding nship een the gamma curve and the pleat。
The aim of this research is to provide a more objective n index for garment structural design and pleating effects.Clothing structure design involves a series of processes thatare used to render clothing through cutting。
fabric pleating。
and joining together。
The goal is to accurately capture the desired design effect by determining the structure's plane state through the use of design renderings。
家具设计中英文对照外文翻译文献
家具设计中英文对照外文翻译文献(文档含英文原文和中文翻译)原文：Researches and Development of InteractiveEducational Toys for ChildrenAbstract: For Oriented by the teaching philosophy "game based learning", this paper carried out an in-depth research on the interactive mode of children's educational toys. In the research process, it attempted to build a new immersed educational-game scenario for children by using the new interactive technology so as to inspire the children's interest in learning and exploration. The research object in this paper was an interactive educational toy-"funny tap" English learning machine for children. After integrating the design concept of this product from an industrial designperspective, we selected specific interactive technology and completed the engineering. Moreover, we have conducted tests of work principles and effect of usage based on the sample machine. The final result indicated that there is a promising and huge market potential to apply the new interactive technology to development of educational toys.Keywords: Interactive Educational Toys, Interactive Design, interactive mode1.INTRODUCTIONSince 1980s, human beings including the children have entered a digital age. Under the influence of the advanced information, early stage education machines, electronic building blocks, electronic wall charts, and other new toys have become children's new favorites. With the influence of the west teaching philosophy-"game based learning", parents are strongly agreed with such toys for children. These modern educational toys will become the mainstream of toy development due to their promotion of children's learning, practical ability, creativity and imagination.Interaction exists in all things contacted by humans, and interactive design emerged to design a kind of communication and dialogue between human and objects to minimize the "cognitive conflict". As a new design theory, interactive design has a wide range of applications in designing educational toys.2. THE PLAN AND BENEFITS OF THE INTERACTIVE MODE OFCHILDREN 'S TOYSThe rise of various digital technologies, such as voice recognition, 3D video, and virtual reality technology etc., gives new experience to people's perception. The author aimed to apply these new digital technologies to the researches of interactive educational toys design.The plan of the interactive mode of children's educational toys:2.1. Voice InteractionVoice interaction voice includes touch voice interaction, voice command interaction and intelligent voice interaction. Touch voice interaction and voice command interaction have been very common, such as electronic wall charts, televox;intelligent voice interaction is the author's aim to create a genuine dialogue between children and simulation toys through digital technology, to foster children's language ability, particularly in a family with only one child, the children need a "partner" to accompany them to learn and play with.2.2. Video InteractionVideo interaction can be divided into 2D image interaction and 3D video interaction. The former has been broadly used in toys, such as in multimedia courseware, image or video of horse will appear when referring to "horse"; 3D video interaction is the author's aim to apply 3D projection technology in the "play" process, for instance, when referring to a green grassland, a grassland projection will appear so that children feel like being on the grassland, which enhances children's learning experience; meanwhile, this enhanced emotional experience will prolong the memory retention time or even extend to a ultra- long-term memory.2.3. Narrative InteractionNarrative interaction is to conceive a story for the toy and offer a task role for children to make them participate in the story. The steps are shown in Figure 1:Fig. 1. The steps of narrative interactionBased on children's curiosity and imitation psychology as well as the investigation of the games, the author found the correct application of story interaction in educational toys can greatly mobilize children's learning enthusiasm, for example, we conceive an English learning process as treasure hunt activity. In this activity, the words are hidden in the treasure box, and children themselves are explorers, if they put one or a few words together, they will get a treasure box, and they can also make a competition with peers to get the treasure boxes. Through establishment of game theme, selection of roles, and plot development in the activities, children not only increase their knowledge of English, also learn how to get along with peers and develop good self-awareness.2.4. Web Virtual Reality InteractionWeb virtual reality interaction is virtual imaging through network connections, making you feel like your partners sitting, playing and learning with you, to deliberatethe loneliness in the contemporary families, and promote children's learning initiative in the competitive context.Psychological research shows that with respect to the learners, the learning behavior resulting in emotional pleasure experience will produce a positive emotional resonance, thereby enhancing the learners' learning initiative and enthusiasm. The realistic educational-game scenario created by interactive educational toys for children not only brings emotional pleasure experience to children so that learning is no longer boring for them with a purpose of mobilizing the enthusiasm of study and developing creative thinking, but also enhances children's social communication ability to help children establish good social character favorable for their life.3. DEVELOPMENT OF INTERACTIVE EDUCATIONAL TOY—"FUNNYTAP"Parents are head-ached on children's learning English, so we focus on developing an interactive English learning toy to help the children remembering words in game scenario and stimulate their interests in learning English, and training children's hand operation and brain coordination.The development practice procedure of interactive toy for children-"funny tap" is shown in Figure 2 as following:Fig. 2. The development practice procedure of "funny tap"3.1. The development process of interactive concept of interactive educational toy-"funny tap"It is the development process of "funny tap" interactive concept. After investigating the object group of children and parents about their needs of English learning machine, we summarized six key indicators such as security, fun and incentive. Here we mainly describe three models of interactions shaded in Figure 3.To meet the requirement of fun, the author designed a narrative interactive process, as is shown in Figure 3:Fig. 3. The narrative interactive process of "funny tap"The word learning process is conceived as a game of whack-a-mole, imagining there are N mole holes, and there are M letters in a word (i.e. M moles with a letter). If you tap down M jumping moles in accordance with the order, you will get the cheers, if the tap is not correct, it will continue to call "come on"; meanwhile, the action of "tap" is not only funny, but also effective to train children's hands and brain coordination.Voice interaction was prepared by the microcontroller program to control the voice modules. There are two features regarding the "funny pat": one is word pronunciation; the other is the design of the applause and cheering voices for reward and punishment, which help to reach the goal of incentive.In the first stage, video interaction was prepared by displaying the letters on buttons through LED dot matrix character display modules mainly controlled by microcontroller; in the second stage, we provided toy with 3D projector for projecting the whole process in the air to construct a 3D emotional scenario, and the action of "tap" is to tap the projections in the air.3.2. Principle diagram of interactive educational toy for children-"funny tap" The operation principle of "funny tap" is shown in Figure 4:Fig. 4. The operation principle of "funny tap"The system consists of six components, such as voice module, LED indicator, action back module, MCU, power module and LED dot matrix character display module. Among these, the three formers are connected with MCU through 8-bit data bus; LED dot matrix character display module is connected with the microcontroller through the 12C bus. Voice module stores English word pronunciation documents needed in the game, and MCU pronounces the word by controlling the voice module via the bus. LED dot matrix character display module consists of driver chips and the 8*8 LED matrix. MCU bus control LED dot matrix character display module via I2C to show the corresponding English letters. Action back module tests and captures the player's actions during the game for the MCU to judge whether the player conducts normal actions to control the game process.3.3. Appearance design process of interactive educational toy-"funny tap"The following Figure 5 is a design process from sketch, modelling, model-making to the final product and the drawing of the product structure explosion.Fig. 5. Appearance design process of "funny tap"3.4. Interaction testSample of N (N is an odd number) preschool children was randomly selected to test the product's availability, usability and user's willingness of using it. Mainly onsite testing observation and questionnaire survey, and then we improve the product according to the test results.Testing times are equal to or more than I so as to find the products with highest interaction. In the product final trial, most of parents fed back that this toy combined fun and knowledge well and the whole learning process was very smooth and the children were very happy when "learning".4. SUMMARY AND PROSPECTChina is a large country of toy manufacturing, but it still remains in the stage of imitating foreign design, especially in educational toy design. The research and practice of interactive educational toys in this study is expected to give some thought and inspiration to toy designers so as to further promote the development of Chinese toy industry.REFERENCES[I] Liu Zaihua, Children's Social Intelligence, Anhui People's Publishing House, 2008.[2] KARL T. ULRICH, STEVEN D. EPPINGER, Product Design and Developmen,Higher Education Press, 2005.[3] (U.S.) Robert J. stembeg, Translated by Yang Bingjun, Chen Yan, Chow Zhiling,Cognitive Psychology, Beijing: China Light Industry Press, 2006.[4] Zhang Zhcnzhong, Li Yanjun, Classification Research of Educational Toys,Textiles and Design, December 2008 Vol. 12.[5] Li Qiaodan, Xia Hongwen, On the Function of Digitized Bran-training Toys inElementary Education, China Education Informationalization Issuing Department.[6] Song Jun, Researches on Design Principles of Children's Educational Toys,[Online]. Available: [7] Liu Mingliang, " The Principle Production and Purchasing of Electronic Toys", New Era Press, 1992.Toy development and design based on the needs of olderpersonsAbstract:In china, aging and the life-quality of older persons has become today’s important issues of social concern, and how to solve this problem thus turns to be an important challenge in the design and development of supplies for the old. Now, the ensuing ways to solve varied. For instance, the design community has put emphasis on the design and development of the supplies for the old, but a large part of these de signs were for medical care and medical products of the senior person. The designsfor the vast majority of the healthy people in their senior age are rarely involved. In this, I think, for the function of toys, the emphasis on the development of physical and mental health of older persons is the key, so to rethink the development of toys for the old persons in china is one of the ways.Keywords: Toys for the old, Needs design, humane careMentions of the toys, we always unconsciously think of the innocent children, as if toys are just child’s belongings. With the improvement of living standards, emphasis on the toys is constantly improved. To meet the needs of children, various designs are brought out, and then from luxury goods, toys have gradually become the child’s necessities. However, the authorities of the china toy association state that the toy is no longer the children’s only product: toy concept has been extended and functional and practical range of modern toy has been further expanded. Toys not only inspire children, but also become the recreation products for the seniors. The old also need toys that could meet their spiritual needs and enrich their life in later years.1．Status of the development and design of toys for the seniorsIn china, toy for the old is still an industry to be developed. Senior people, as customers, they have needs and also purchasing power, but no targeted toys for them. There are as much as 130 million seniors in china who would be a huge consumer group, but the research and development of toys for old consumers has lagged behind developed country for more than 30 years.In America, the toys designed for the senior amount to 40% of the toy market. The toy market for old persons is more mature. They have many toy stores for the seniors throughout the urban and rural areas. Also our neighbor Japan does well in the development of toys for the old persons, and most toy companies have produced toys for seniors, and continued to introduce new products.2．The meaning of the development of toys for the seniorsRetiring from work, the senior people get more time than before. Besides watching TV at home, they have no many alternative entertainments. Some old people have been for a long period in loneliness. Over time, they are prone todepression, anxiety disorder and Alzheimer’s, seriously affecting their physical and mental health and become burden to children and society.Li guangqing in department of rehabilitation of Beijing Xuanwu Hospital once said: “with age increasing, the function of the body of the seniors gradually degraded, and their reaction will be clumsier. At the same time, retirement from work, the opportunity for the old to use their brain reduces, which further brings the decline of attention and cognitive ability. Except to maintain good habits and moderate exercise, to slow down brain aging, putting hands and brain in work at the same time is the most effective way, which is exactly the function of toys. for people with Alzheimer’s, playing with toys, to some extent, would alleviate the condition.Therefore, toys can develop people’s thinking ability, and improve our intelligence. If the seniors play with toys constantly, the aging of the brain and the Alzheimer’s would be effectively prevented. Medical experts found that to maintain old people’s intelligence, we must first fully protect the brain. In addition to proper nutrition and adequate sleep, the seniors should make most of the brain. Just as Chinese saying tells that”water does not rot, and the door hinge is never worm-eaten “, the more one use his brain, the more sensitive it becomes. Playing with toys is exactly a good way to use the brain. With toys, the old people not only receive more information, at the same time become more optimistic than before, thereby enhancing their immune system function.3．The needs-analysis of toys for the oldWhat is a needs analysis? This approach is to focus on the users’ needs. Users’needs are sources of many new products.What is the demand-design? it is the most front-end process for new product in its life cycle, and decides the success or failure of the new products. Needs-design starts from the businesses and designers’judgment of the market or the needs of users, and ends at planning proposals or technical specifications on description of the product development. Understand the market or user demand is a high-level investment for the success of the product.The development and design of toys for old persons should start from the needs ofthe seniors. Only a real understanding of the old consumers and their psychological and physiological needs can bring toys that give practical cares for the seniors physically and spiritually.Toys for the old should bring human care. Toy design process should be integrated into this concept. The aim of the toy design for the old is enhanced, with seniors-centered design principles, and with the help of analysis on the seniors’physiological psychological characteristics, cultural level and lifestyle. The toy design principle that shows humane care for the seniors is reflected at the same time.(1)Safety firstTo varying degrees, the judgment, cognitive ability and ability to respond of the old people weaken, thus in the process of using the product, they inevitably make mistakes. In case a threat to physical and mental health occurs, they usually are unable to escape the danger. Therefore, toys for the seniors should be fault-tolerant. So that, the old people even make a mistake, there will be no danger. Here the reduction of operation process and the set of message for safe operation is an effective way to ensure the safety of the seniors with toys.(2)Moderate difficultThe design of toys for the old should be of moderate difficulty, and the purpose is to arouse their interest in playing. If too simple, it would not enhance the interest of the seniors and thus would not achieve the aim of exercising the brain; if too difficult, it would be strenuous for them to learn, and consequently cause a sense of failure which is not conducive to their mental health.(3)Easy to identifyThe toy should have a familiar form and an understandable functional theory for the old. It should also be equipped with an interface in keeping with the experience and habits of the seniors. Besides, the toys that need interface design, should take into account the graphic symbols, size, color, clarity of sound, light intensity.(4)Facilitate communicationPeople’s feelings need to vent and exchange, especially for the seniors. For them, emotional communication is indispensable to maintain their vitality, andimprove the quality of life. Playing with toys, there are many ways for the old to choose, such as: taking turns to participate, working together and racing in the game. The development of multiple-persons playing toys is to create a harmonious environment in which they can talk when play. So the core of toy-development is to involve the participants as much as possible. For the participating ways, common collaborative participatory approach is the best, which is more conducive to conversation, and get to know some new friends. In this way the seniors can expand their social circle with emotional exchange.(5)The effect for keeping fitness and developing intelligenceIncreasing with age, people’s organ recession becomes an objective physiological phenomenon. In order to maintain good physical function and mental state, and improve the quality of life, fitness puzzle is a very important content in the lives of older persons. Body-building that can achieve with playing toys is the most basic needs of older persons. Old people by playing intellectual toys can effectively prevent Alzheimer’s disease, so to maintain the flexibility of the seniors’mind is the main direction of the toy development.(6)Cultural connotationsLife experiences bring the old people with more comprehensive concept of life, thus toys with a certain ideological and cultural depth usually put them in recollecting and thinking of issues. Toys for the seniors are different from those for children: a child plays a toy intuitively, while the old emphasize the toy’s inherent fun, and show great interest in the toys with cultural connotations. Of course, this culture must be familiar with the elderly, has gone deep into the ideological deep.Summing up, toys for the seniors have a promising market, for each one of us would inevitably become old. The design industry should make more efforts to improve the living standard of the seniors. One way is to develop toys for the old and help them improve their life quality with theses design. We all know, care for the old is to care for all mankind, and designing from the needs of the old has become an urgent task of today’s society.References：[1]Yang Guanghui. China’s Population Aging and the Industrial Structure [m].Liaoning Science and Technology Press, 2008.7.[2] Wang Lianhai. Chinese Toys, Art History [m], Hunan Fine Arts Publishing House, 2006.8.[3] Wang court. Toys And Innovative Design [m], Chemical Industry Press, 2005.12.儿童家具的人性化设计摘要：本文以儿童家具设计问题为出发点,提出人性化的概念在新的时代环境下的新解释,并指出新的人性化设计原则在儿童家具的设计方法中的实现,分析儿童家具的现状,并提出一些建议。
本科毕业设计外文文献翻译
（Sheaｒ waｌl ｓt ｒuctural desigｎ ofh ｉgh-ｌev ｅl fr ａmeworkＷｕ Jiche ｎgＡbstract ： In t ｈis pape ｒ the basic c ｏｎcepts of ｍａn ｐow ｅr ｆｒom th ｅ ｆra ｍｅ sh ｅａr w ａｌl str ｕc ｔｕｒｅ, analy ｓis of the ｓtruct ｕr ａｌ des ｉgn ｏf th ｅ c ｏnt ｅnt ｏｆ t ｈe fr ａme she ａr wall, in ｃｌudi ｎg the ｓeism ｉc wa ｌl she ａr spa本科毕业设计外文文献翻译学校代码： 10128学 号：题 目：Shear wall structural design of high-level framework 学生姓名： 学 院：土木工程学院 系 别：建筑工程系 专 业：土木工程专业（建筑工程方向） 班 级：土木08-（5）班 指导教师： (副教授)ｎratiｏdesign, ａnd a concrｅtｅｓtruｃtuｒe in thｅmｏst co ｍmonｌy useｄframe shear walｌstｒｕcturｅtｈｅdesign of p ｏiｎｔs to note.Keyworｄs: cｏncrｅｔｅ; fｒaｍｅshｅａｒwall sｔｒucｔｕre；hiｇh－risｅbuildｉｎｇsThe wall is aｍoｄern high－rｉｓe buiｌdiｎgs is an iｍpo ｒｔant buiｌdinｇconｔｅnt, the ｓize of thｅfraｍe sheａr wall must comｐly with buildｉng reguｌａtｉons. The pｒｉnｃipｌe is ｔhat the largeｒsｉzｅbｕt the thｉｃknessｍuｓt ｂｅsmaller gｅoｍetric featｕrｅｓshoｕlｄｂe ｐｒeｓented ｔo the pｌatｅ,ｔｈe forｃe is close to cylｉndrｉcal.Ｔhe waｌl sｈｅar wa ｌl strｕｃｔure ｉs a flaｔcomｐonent. Itｓeｘposure to tｈe force aｌoｎg ｔhe ｐlane leｖｅl of theｒole ofｓｈear and momｅｎt, must also take ｉｎtｏａccounｔthe veｒｔical preｓsure.Opeｒate unｄer thｅcomｂiｎed actｉｏn oｆbenｄing momeｎts and axial force aｎｄsheａr forcｅbｙthe caｎtilｅｖｅr deep beａm uｎder ｔｈe acｔion of the force leveｌｔo lｏo ｋinto ｔｈe bottom mouｎted on ｔhe basｉs of. Sheaｒｗaｌl ｉｓdiｖidｅｄinｔo a whole walｌand ｔheａssoｃiated ｓｈeａr wall in thｅactual project,a wholｅwａlｌfor ｅxａmpl ｅ, suｃh as ｇenｅraｌhｏusiｎｇｃonstｒuction in tｈe gablｅｏr fish bｏne strｕcture ｆｉlｍwａｌls ａnd small opｅningｓwall.Cｏupled Sｈeａr ｗalls are ｃonnｅcted bｙｔhｅcｏupｌing ｂeam shｅａr wall.Buｔｂecause tｈeｇｅnerａlｃｏupling beaｍstｉｆfness is less thaｎｔhe wall stiｆfnｅsｓof the lｉmbs，ｓｏ. Wａlｌliｍb aｌonｅis obviｏus.The ｃｅntral beam of tｈeｉnflｅｃtion pｏｉnｔtｏpay aｔtenｔiｏｎto tｈeｗaｌl pressｕre thａn the limiｔs of the lｉmb axis. Will forｍa shortｗiｄe beａms，widｅcolｕmn wａll liｍｂｓhear wａll ｏpｅnings toｏlarge ｃomｐonｅnt aｔbothｅn ｄs ｗith jｕst the domain of vａｒiabｌe crosｓ－ｓecｔｉon ro ｄin ｔhe intｅrｎａｌforcｅｓｕnder tｈｅaｃtioｎof maｎy Ｗalｌlｉmb iｎflｅcｔion point Ｔhｅｒeｆoｒe, ｔhe cａｌcula ｔions ａｎd consｔruction sｈouldAccordinｇtｏappｒoxiｍａｔe tｈe framｅstｒucｔure to ｃonsideｒ.Tｈe desｉｇｎof ｓhｅａr walls ｓhoulｄbe based on the cｈａractｅrisｔics ｏf ａvａｒｉｅty oｆwall itseｌｆ,ａnd dｉfferｅnｔmeｃhanical ch ａrａcteｒisｔｉcｓand requireｍents,wall oｆthｅinternａｌforceｄistrｉbutｉon and failurｅmoｄｅs ｏf sｐecific and cｏmprehensive ｃonｓideration of the design rｅinｆorcemｅnt aｎd stｒuctural measｕres. Ｆrame sｈear wall ｓｔrｕctuｒe deｓiｇn is to cｏｎsider the ｓtructｕre of the oｖerall ａnａｌysis for ｂoｔh dｉrecｔｉｏｎsｏｆthｅhｏrｉzontal and vｅrtiｃalｅfｆects. Oｂtain thｅinternal force ｉs reｑuirｅd in ａccｏrdancｅｗｉｔｈtｈe bias or paｒtｉal ｐull normal sｅcｔｉon forｃｅｃaｌculatiｏn.The waｌl strｕcture oｆtheｆｒame sｈear ｗall ｓｔructural dｅsign of ｔhe coｎtent frame hｉgh-rise buildings, in ｔhe actual ｐrｏjeｃｔiｎｔhｅuse of thｅｍoｓt seisｍic ｗａlls have suffiｃient quantitｉeｓto meｅt ｔheｌｉmitsｏf the lａyer displacement, the loｃation iｓｒelａtiｖely flexiblｅ. Seiｓmic wａll for cｏntinuous layout，ｆulｌ-length ｔhroｕgh．Should bｅdesigned to avoid the waｌl mutaｔioｎs ｉn limb ｌｅｎgth and alignment is noｔuｐａnd down the ｈolｅ. The samｅtｉme．Tｈe inｓide of ｔhe hole marginｓcｏlｕｍｎshｏｕld not ｂｅｌｅssｔhan３00mm ｉｎordｅｒtｏguaraｎteｅtheｌengtｈof the colｕｍn ａs the edgｅof tｈe coｍponent and constｒａiｎt eｄgｅcｏｍponeｎts．Thｅbi-direc ｔiｏnal laｔerａl forｃe ｒesiｓting strucｔurａl fｏrm of verticａl aｎｄhorｉzontaｌwalｌcoｎnected.Eａｃh ｏｔhｅr as ｔhe ａffiｎiｔｙof the shｅar wall. Ｆor ｏnｅ, two seismic frａme sｈe ａr ｗalｌｓ,ｅｖen beam highｒatio ｓhould noｔgreateｒthan 5 aｎd a height of nｏt less thaｎ400mm.Midline colｕmnａnd beａmｓ,wall ｍｉdline shouｌdｎoｔbe greaｔer tha ｎthe ｃoｌｕmｎwidｔｈof1/4，ｉn ordｅr ｔｏreｄuce thｅtoｒsional eｆfect of the sｅiｓmｉｃacｔion ｏnｔｈｅｃolｕmn．Oｔhｅrwｉsｅcan be taken tｏstrengthｅn theｓtirruprａｔｉo iｎｔhe cｏlｕmn tｏmake ｕp.If thｅshear wａｌl sheａｒsｐａn ｔhａnｔhe ｂig twｏ. Ｅveｎthe beａｍcro ｓs-heｉｇht ratiｏgreateｒthan 2.5, ｔhen tｈe design presｓｕｒe ｏf thｅｃｕt shoulｄnoｔmａkｅａｂig 0.2. Howevｅｒ, ｉf the sheａｒwallｓheａr sｐａｎｒatiｏof ｌess than two couｐlinｇｂeａms sｐan of ｌeｓs than ２．5, then the shear coｍｐres ｓiｏn rａｔiｏis noｔgreaｔer thａn 0.15. Thｅｏther haｎｄ，ｔhe bｏttom oｆthe fraｍe ｓhｅar walｌstructure ｔo enhａnce tｈｅdｅsign sｈould ｎoｔbe leｓs thaｎ２０0mmａnd noｔlesｓthaｎstorey 1/１6，othｅｒｐaｒtｓｓhｏulｄnot be lｅss than 160mm ａnd ｎｏt ｌｅss thaｎｓtoｒey １/20. Arounｄthe wall of the frame ｓhｅar ｗall strucｔure sｈｏulｄbe set ｔo the beａm or dark bｅamａnd the sｉｄe columｎｔｏform a borｄｅr. Ｈoｒizｏntａl ｄｉｓtrｉbuｔioｎoｆsｈear waｌls cａn from the sheａr effect，tｈｉs design wｈen ｂuilｄｉng higｈｅr longeｒor fｒaｍｅｓtructｕre reinfoｒcｅment shｏuld be aｐprｏpｒiatelｙincｒeａｓed, ｅspｅcｉａlｌy in the sｅnｓitivｅｐarts of the beam pｏsition ｏr teｍperaｔuｒe, stiffnｅsｓchａnge is besｔappｒopriatｅly increased, ｔｈeｎcｏnsidｅration sｈoulｄbe ｇｉveｎｔo the wａlｌvertｉcaｌreiｎforｃemeｎt,becaｕse ｉt is mａinly fｒom the bｅnding efｆecｔ, aｎｄtake in ｓome ｍｕlti-ｓtorｅｙshｅａｒｗａll structuｒereinforcｅｄreｉnｆorceｍent rate -likｅlｅsｓconｓtｒained edgｅｏｆｔhｅcomｐonent or components reinforｃemeｎt of thｅedge ｃomｐｏnent.Referｅnces: [1 sad Hａyaｓhi,He Yaming. Ｏn the shorｔshｅar ｗall ｈigh-riｓe bｕilｄinｇｄesign ［J]．Kｅｙｕaｎ, 2008, (O2).高层框架剪力墙结构设计吴继成摘要: 本文从框架剪力墙结构设计的基本概念人手, 分析了框架剪力墙的构造设计内容, 包括抗震墙、剪跨比等的设计, 并出混凝土结构中最常用的框架剪力墙结构设计的注意要点。
机械设计外文文献翻译、中英文翻译
机械设计外文文献翻译、中英文翻译unavailable。
The first step in the design process is to define the problem and XXX are defined。
the designer can begin toXXX evaluated。
and the best one is XXX。
XXX.Mechanical DesignA XXX machines include engines。
turbines。
vehicles。
hoists。
printing presses。
washing machines。
and XXX and methods of design that apply to XXXXXX。
cams。
valves。
vessels。
and mixers.Design ProcessThe design process begins with a real need。
Existing apparatus may require XXX。
efficiency。
weight。
speed。
or cost。
while new apparatus may be XXX。
To start。
the designer must define the problem and XXX。
ideas and concepts are generated。
evaluated。
and refined until the best one is XXX。
XXX.XXX。
assembly。
XXX.During the preliminary design stage。
it is important to allow design XXX if some ideas may seem impractical。
they can be corrected early on in the design process。
毕业设计(论文)外文资料翻译(学生用)
毕业设计外文资料翻译学院：信息科学与工程学院专业：软件工程姓名： XXXXX学号： XXXXXXXXX外文出处： Think In Java (用外文写)附件： 1.外文资料翻译译文；2.外文原文。
附件1：外文资料翻译译文网络编程历史上的网络编程都倾向于困难、复杂，而且极易出错。
程序员必须掌握与网络有关的大量细节，有时甚至要对硬件有深刻的认识。
一般地，我们需要理解连网协议中不同的“层”（Layer）。
而且对于每个连网库，一般都包含了数量众多的函数，分别涉及信息块的连接、打包和拆包；这些块的来回运输；以及握手等等。
这是一项令人痛苦的工作。
但是，连网本身的概念并不是很难。
我们想获得位于其他地方某台机器上的信息，并把它们移到这儿；或者相反。
这与读写文件非常相似，只是文件存在于远程机器上，而且远程机器有权决定如何处理我们请求或者发送的数据。
Java最出色的一个地方就是它的“无痛苦连网”概念。
有关连网的基层细节已被尽可能地提取出去，并隐藏在JVM以及Java的本机安装系统里进行控制。
我们使用的编程模型是一个文件的模型；事实上，网络连接（一个“套接字”）已被封装到系统对象里，所以可象对其他数据流那样采用同样的方法调用。
除此以外，在我们处理另一个连网问题——同时控制多个网络连接——的时候，Java内建的多线程机制也是十分方便的。
本章将用一系列易懂的例子解释Java的连网支持。
15.1 机器的标识当然，为了分辨来自别处的一台机器，以及为了保证自己连接的是希望的那台机器，必须有一种机制能独一无二地标识出网络内的每台机器。
早期网络只解决了如何在本地网络环境中为机器提供唯一的名字。
但Java面向的是整个因特网，这要求用一种机制对来自世界各地的机器进行标识。
为达到这个目的，我们采用了IP（互联网地址）的概念。
IP以两种形式存在着：(1) 大家最熟悉的DNS（域名服务）形式。
我自己的域名是。
所以假定我在自己的域内有一台名为Opus的计算机，它的域名就可以是。
毕业设计(论文)外文资料翻译【范本模板】
南京理工大学紫金学院毕业设计（论文）外文资料翻译系：机械系专业：车辆工程专业姓名:宋磊春学号:070102234外文出处：EDU_E_CAT_VBA_FF_V5R9(用外文写)附件：1。
外文资料翻译译文；2.外文原文.附件1：外文资料翻译译文CATIA V5 的自动化CATIA V5的自动化和脚本：在NT 和Unix上：脚本允许你用宏指令以非常简单的方式计划CATIA。
CATIA 使用在MS –VBScript中(V5.x中在NT和UNIX3。
0 )的共用部分来使得在两个平台上运行相同的宏。
在NT 平台上：自动化允许CATIA像Word/Excel或者Visual Basic程序那样与其他外用分享目标。
ATIA 能使用Word/Excel对象就像Word/Excel能使用CATIA 对象。
在Unix 平台上:CATIA将来的版本将允许从Java分享它的对象。
这将提供在Unix 和NT 之间的一个完美兼容。
CATIA V5 自动化：介绍（仅限NT）自动化允许在几个进程之间的联系:CATIA V5 在NT 上：接口COM：Visual Basic 脚本(对宏来说)，Visual Basic 为应用（适合前:Word/Excel )，Visual Basic。
COM（零部件目标模型)是“微软“标准于几个应用程序之间的共享对象。
Automation 是一种“微软“技术,它使用一种解释环境中的COM对象。
ActiveX 组成部分是“微软“标准于几个应用程序之间的共享对象,即使在解释环境里。
OLE（对象的链接与嵌入）意思是资料可以在一个其他应用OLE的资料里连结并且可以被编辑的方法(在适当的位置编辑）.在VBScript,VBA和Visual Basic之间的差别：Visual Basic(VB）是全部的版本。
它能产生独立的计划,它也能建立ActiveX 和服务器。
它可以被编辑。
VB中提供了一个补充文件名为“在线丛书“(VB的5。
软件工程专业毕业设计外文文献翻译
软件工程专业毕业设计外文文献翻译1000字本文将就软件工程专业毕业设计的外文文献进行翻译，能够为相关考生提供一定的参考。
外文文献1: Software Engineering Practices in Industry: A Case StudyAbstractThis paper reports a case study of software engineering practices in industry. The study was conducted with a large US software development company that produces software for aerospace and medical applications. The study investigated the company’s software development process, practices, and techniques that lead to the production of quality software. The software engineering practices were identified through a survey questionnaire and a series of interviews with the company’s software development managers, software engineers, and testers. The research found that the company has a well-defined software development process, which is based on the Capability Maturity Model Integration (CMMI). The company follows a set of software engineering practices that ensure quality, reliability, and maintainability of the software products. The findings of this study provide a valuable insight into the software engineering practices used in industry and can be used to guide software engineering education and practice in academia.IntroductionSoftware engineering is the discipline of designing, developing, testing, and maintaining software products. There are a number of software engineering practices that are used in industry to ensure that software products are of high quality, reliable, and maintainable. These practices include software development processes, software configuration management, software testing, requirements engineering, and project management. Software engineeringpractices have evolved over the years as a result of the growth of the software industry and the increasing demands for high-quality software products. The software industry has developed a number of software development models, such as the Capability Maturity Model Integration (CMMI), which provides a framework for software development organizations to improve their software development processes and practices.This paper reports a case study of software engineering practices in industry. The study was conducted with a large US software development company that produces software for aerospace and medical applications. The objective of the study was to identify the software engineering practices used by the company and to investigate how these practices contribute to the production of quality software.Research MethodologyThe case study was conducted with a large US software development company that produces software for aerospace and medical applications. The study was conducted over a period of six months, during which a survey questionnaire was administered to the company’s software development managers, software engineers, and testers. In addition, a series of interviews were conducted with the company’s software development managers, software engineers, and testers to gain a deeper understanding of the software engineering practices used by the company. The survey questionnaire and the interview questions were designed to investigate the software engineering practices used by the company in relation to software development processes, software configuration management, software testing, requirements engineering, and project management.FindingsThe research found that the company has a well-defined software development process, which is based on the Capability Maturity Model Integration (CMMI). The company’s software development process consists of five levels of maturity, starting with an ad hoc process (Level 1) and progressing to a fully defined and optimized process (Level 5). The company has achieved Level 3 maturity in its software development process. The company follows a set of software engineering practices that ensure quality, reliability, and maintainability of the software products. The software engineering practices used by the company include:Software Configuration Management (SCM): The company uses SCM tools to manage software code, documentation, and other artifacts. The company follows a branching and merging strategy to manage changes to the software code.Software Testing: The company has adopted a formal testing approach that includes unit testing, integration testing, system testing, and acceptance testing. The testing process is automated where possible, and the company uses a range of testing tools.Requirements Engineering: The company has a well-defined requirements engineering process, which includes requirements capture, analysis, specification, and validation. The company uses a range of tools, including use case modeling, to capture and analyze requirements.Project Management: The company has a well-defined project management process that includes project planning, scheduling, monitoring, and control. The company uses a range of tools to support project management, including project management software, which is used to track project progress.ConclusionThis paper has reported a case study of software engineering practices in industry. The study was conducted with a large US software development company that produces software for aerospace and medical applications. The study investigated the company’s software development process,practices, and techniques that lead to the production of quality software. The research found that the company has a well-defined software development process, which is based on the Capability Maturity Model Integration (CMMI). The company uses a set of software engineering practices that ensure quality, reliability, and maintainability of the software products. The findings of this study provide a valuable insight into the software engineering practices used in industry and can be used to guide software engineering education and practice in academia.外文文献2: Agile Software Development: Principles, Patterns, and PracticesAbstractAgile software development is a set of values, principles, and practices for developing software. The Agile Manifesto represents the values and principles of the agile approach. The manifesto emphasizes the importance of individuals and interactions, working software, customer collaboration, and responding to change. Agile software development practices include iterative development, test-driven development, continuous integration, and frequent releases. This paper presents an overview of agile software development, including its principles, patterns, and practices. The paper also discusses the benefits and challenges of agile software development.IntroductionAgile software development is a set of values, principles, and practices for developing software. Agile software development is based on the Agile Manifesto, which represents the values and principles of the agile approach. The manifesto emphasizes the importance of individuals and interactions, working software, customer collaboration, and responding to change. Agile software development practices include iterative development, test-driven development, continuous integration, and frequent releases.Agile Software Development PrinciplesAgile software development is based on a set of principles. These principles are:Customer satisfaction through early and continuous delivery of useful software.Welcome changing requirements, even late in development. Agile processes harness change for the customer's competitive advantage.Deliver working software frequently, with a preference for the shorter timescale.Collaboration between the business stakeholders and developers throughout the project.Build projects around motivated individuals. Give them the environment and support they need, and trust them to get the job done.The most efficient and effective method of conveying information to and within a development team is face-to-face conversation.Working software is the primary measure of progress.Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely.Continuous attention to technical excellence and good design enhances agility.Simplicity – the art of maximizing the amount of work not done – is essential.The best architectures, requirements, and designs emerge from self-organizing teams.Agile Software Development PatternsAgile software development patterns are reusable solutions to common software development problems. The following are some typical agile software development patterns:The Single Responsibility Principle (SRP)The Open/Closed Principle (OCP)The Liskov Substitution Principle (LSP)The Dependency Inversion Principle (DIP)The Interface Segregation Principle (ISP)The Model-View-Controller (MVC) PatternThe Observer PatternThe Strategy PatternThe Factory Method PatternAgile Software Development PracticesAgile software development practices are a set ofactivities and techniques used in agile software development. The following are some typical agile software development practices:Iterative DevelopmentTest-Driven Development (TDD)Continuous IntegrationRefactoringPair ProgrammingAgile Software Development Benefits and ChallengesAgile software development has many benefits, including:Increased customer satisfactionIncreased qualityIncreased productivityIncreased flexibilityIncreased visibilityReduced riskAgile software development also has some challenges, including:Requires discipline and trainingRequires an experienced teamRequires good communicationRequires a supportive management cultureConclusionAgile software development is a set of values, principles, and practices for developing software. Agile software development is based on the Agile Manifesto, which represents the values and principles of the agile approach. Agile software development practices include iterative development, test-driven development, continuous integration, and frequent releases. Agile software development has many benefits, including increased customer satisfaction, increased quality, increased productivity, increased flexibility, increased visibility, and reduced risk. Agile software development also has some challenges, including the requirement for discipline and training, the requirement for an experienced team, the requirement for good communication, and the requirement for a supportive management culture.。
服装设计类毕业设计毕业论文外文翻译-服装设计工程之边缘设计英文翻译外文
原文Couture Sewing TechniqueClaire B.ShaefferEdge Finishes Hems,Facings and BindingsU nless finished in some way, the edges of a garment ravel and look incomplete. These edges—the neckline; the vertical front edges of jackets, coats and many blouses; jackets and coats—can be finished in conspicuously or they can become distinctive, decorative elements of the design.Three finishes are used extensively in couture:hems, facings and bindings.The choice of edge finish depends on many things—the shape of the edge being finished; its position on the garment; the type, design and fabric of the garment; current fashion trends; and the preferences of the individual wearer and the designer. For example, if the bottom edge of a dress is straight, it might be completed with a hem, a facing or a binding. But if this edges is asymmetrical, curved, scalloped or otherwise unusually shaped, it will need to be finished with a facing. Even when the edge is visually the same on the neckline and hem, the two different edges are likely to require slightly different finishes to accommodate the curve at the neckline and the weight of the fabric at the hem. And although it’s obvious that a tailored garment would require very different finishingfrom an evening gown, even similar designs vorked in dissimilar fabrics would dictate finishes suitable for each fabric.Although hems, facings and bindings are all edge finishes, each has a slightly different function. Hems are generally used on the lower edges of a garment or garment section (for example, a sleeve) and many help the garment hang attractively by adding weight to the edge. Facings, on the other hand, are applied to the upper and vertical edges of a garments. Bindings can be used on upper, lower or vertical edges, but they’re used most often to replace facings rather than hems.Facings can be cut as separate sections and sewn to the garment to finish curved or shaped edges. Or, when used on edges that are straight or only slightly curved, they can be nothing more than a wide hem allowance, in which case they’re called extended facings. Both hems and facings are visible on only one side—usually the underside—of the garment. Bindings, by contrast, are separate strips of fabric that encase the garment edge and finish both sides of the garment attractively.Because in couture the cost of labor and materials takes a back seat to the desired results, edges are not always finished with the simplest method or the one most often used in ready-to-wear construction or home sewing.Whatever the finishing method, hems, facings and bindings can be sewn entirely by hand or machine work.. The hand work visible on the finished product, however, is only a fraction of the hand work used to finish the edges of the traditional couture garment.FACINGSFacings, like hems, are designed to finish the edge of the garment. Unlike hems, which hang free of the body and affect the garment’s hang more than its overall shape, faced edges frequently fit the body’s curves and subtly affect the garment’s silhouette. Used on garment openings, curved edges and shaped edges like jacket lapels, facings contribute significantly to an overall impression of a well-constructed garment.There are three types of facings: extended, shaped and bias. Two of these —shaped and bias facings—are cut separately from the garment and can be sewn from self-fabric or lightweight lining fabrics. The extended facing is cut as an extension of the garment section like a plain hem and is, of course, self-fabric.The extended facing is nothing more than a 1/2-in. to 2-in. hem and is sewn exactly like a plain hem (see pp. 63-64). When the garment edge is on the length-wise grain, the extended facing duplicates the shape andgrain of the edge it faces. But when the edge is slanted on a bias or has a slight curve, the facing can’t duplicate the grain and may have to be eased, stretched or clipped to fit the edge smoothly.The extended facing is used extensively in couture because the folded edge of this facing is flatter and more supple than the seamed edges of shaped and bias facings and consequently drapes better. Edges with extended facings are generally interfaced and stabilized so that they maintain their original shape for the life of the garment.As its name suggests, the shaped facing is cut to duplicate the shape of the edge it faces and ususlly duplicates the grain as well. This facing is often used on necklines and on edges intended to have a crisp, constructed look, and it’s always used on intricately shaped edges like a scalloped hem.The bias facing is a strip cut on the true bias. Because it doesn’t duplicatethe grain of the edge it faces, this facing must itself be shaped to fit the edge. Bias facings are made from lightweight fabrics and produce narrow, inconspicuous facings.In cousture, more than one type of facing is often used on a single garment or even on a single edge. The pink gazar dress shown above, for example, has extended facings on the front neckline and back opening with shaped facings on the front neckline and back opening with shaped facings on the back neckline. Similarly, the jacker on p.60 has a shaped facing on the upper half of the front edge and an extended facing on the lower half of this edge.Before applying any kind of facing, examine the garment’s fit to determine whether the edge needs to be help in or stabilized with a stay tape (see pp. 49-50) or interfaced (see p. 68). Once you’ve handled the edge as required, then you can proceed to apply the facing you’ve chosen.SHAPED FACINGSShaped facings can be applied by hand or by machine. Both types of applications are used in couture, while only machine applications are used in resdy-to-wear. The machine application is, of course, faster, but it’s sometimes more difficult to shape the facing so that it fits smoothly,and the seamline is sometimes visible at the garment edge. The instructions below are for applying the facing by hand. (For directions on applying shaped facings by machine, refer to your favorite sewing manual.)These directions focus on neckline facings because they’re most frequently used in couture workrooms. However, the directions can be applied to other edges such as waistbands, armholes, applied pockets, collars and cuffs, and they can be adapted for garment linings. The facing can be made any time after the neck edge is established, the seamline or foldline is thread-traced, and the edge is interfaced or stabilized appropriately for the design.Facings can be cut from the original garment pattern if the edge wasn’t changed during the fitting process, or the garment itself can serve as a pattern. When the garment is used as a pattern, the thread-traced neckline can be used to establish a corresponding stitching line on the facing. Afinished neckline can also be used as a guide when you’re applying the facing by hand.Neck facings can be cut in several shapes. Two of the most popular are the traditional circlular shape, which measures an even distance all around from the edge, and a rectangular shape, which extends into the armscye seams. When the larger shape is used, the facing edges can be anchored in the seamlines, holding them smooth and in place. The facing shadow may also be less obtrusive with the larger shape, depending on the design. The obvious disadvantage of this facing is the additional fabric introduced into the shoulder area, which may give the garment a bulky appearance.One solution for reducing some of this bulk is to relocate the seamlines 1/2 in. to 1 in. from their original positions. In couture, the seams on facings are not always aligned with the corresponding garment seamlines, as they are in ready-to-wear and home sewing.The directions that follow are for cutting and applying the less familiar rectangular facing. They can easily be adapted for a circular facing, Start by selecting some scraps from your garment fabric for the front and back facings unless the fabric is bulky or heavy, in which case use a lighter,firmly woven material for the facings. Rectangular pieces of cloth are preferable because they make it easier to identify the grainlines. If you’re cutting a rectangular facing for a garment with a high, round neckline with a closre in the back, begin with one large rectangle about 16 in. wide by 7 in. long for the front facing and two smaller ones about 8 in. wide by 6 in. long for the back facings.When applying the facing by hand, it’s easier to finish the garment edge before making the facing so that you can use the finished, do so before starting the facing and clip the free edge of the interfacing as needed, to make it lie flat. Trim the seam allowance around the garment neck to 3/4 in. andfold it to the wrong side. Baste a generous 1/5 in. from the edge. To minimize the seam allowance’s tendency to curl around the neck, snip shallow cuts into the raw edge every inch or so as needed to make the neckline seam allowance lie flat(as shown on p.74).With the wrong side up, place the neckline over a pressing cushion andpress just the neckline edge. With your fingers, gently try to flatten the raw edge. If necessary, trim the edge further to 3/8 in. for firmly woven fabrics and 1/2 in. for less stabble fabrics. If the seam allowance still doesn’t lie flat, clip the raw edge with short, closely spaced snips up to, but not through the basting stitches around the neck edge. Use a loose catchstitch to sew the edge of the seam allowance to the underlining or interfacing. If the garment has neither, sew carefully so the stitches do not show on the right side of the garment.Cut a rectangle for each section to be faced. Before proceeding, decide whether relacating the shoulder seams will redistribute the bulk. After relacating the seam, if you decide to do so, begin with wrong sides together, and match and pin the grainlines together at the center front of the garment and its facing. Then, holding the garment neckline curved, as it will be when worn, smooth the facing in place, pinning as you go. When you get to the shoulder seams, smooth the front facing over the seams so that the seam allowances are flat. Pin and then trim away the excess at the shoulder seams and at the neck edgd, leaving 1/2-in. seam allowances on the facing, as shown above.Pin the back facing(s) in place. At the shoulder seams,trim and then turn the raw edges under, then pin and slip-baste, as shown above. At thispoint, you can machine-stitch the shoulder seams. At the neckline, trim away the excess, leaving a 1/2-in. seam allowance.Turn under the raw edge so the facing is 1/16 in. to 1/4 in. below the edge of the neckline and does not expose the clips on the garment’s seam allowance. If necessary, clip the edge of the facing at intervals as needed to make it turn under smoothly and pin it in place. On edges with shallow curves, you can turn back the neck edge of the facing in place and press lightly. Using a fell stitch or slipstitch, sew the facing to the neck edge and join the shoulder seams if they weren’t machine-stitched. Remove the bastings and press lightly.BIAS FACINGSA bias facing is a narrow strip of fabric cut on the true bias that’s shaped, rather than cut, to duplicate the edge it faces. Well adapted to garments with soft edges, this facing is frequently used on blouses and dresses and on lightweight silk and cotton fabrics. In couture work-rooms, most bias facings are applied by hand. Generally, self-fabric is used if the garment is sewn from light-weight fabric, but if the fabric is heavy, lining material can be used instead.Bias facings are narrower and less conspicuous than shaped facings, and since they require less fabric, they’re both more comfortable to wear nextto the skin and more economical to sew. There are two disadvantages to these facings, however. When a bias facing is applied, the garment edge is rarely interfaced and may not be as smooth. And since the bias facing is usually slipstitched to the garment, it’s sometimes difficult to prevent the stitches from showing on the outside of the garment.Most bias facings are finished so they’re about 1/2 in. wide, but they can be as narrow as 1/4 in. on a jewel neckline and as wide as 2 in. at the waist of a skirt. Generally, the wider the bias facing, the more difficult it is to shape it to a curved edge.Before applying a bias facing, finish the garment edge. Fold the seam allowance to the wrong side and baste 1/8 in. to 1/4 in. from the edge. Clip as needed to make the edge lie flat. With the wrong side up, press the edge.Measure the garment edge to be faced and cut a bias strip several inches longer, or join several strips for the length you need. For a 11/2-in. wide facing, the strip should be 1 in. wide for straight edges and 11/2 in.wide for curved edges. Fold one of the long edges under 1/4 in. This is best accomplished by folding 6 in. at one time and pleating the folded edge with your hands into 1-in. pleats so the edge will stay folded without pressing, which might stretch it.Begin with the wrong side up and match the wrong side of the bias strip to the wrong side of the folded garment edge, aligning the bias edge with the basting, 1/8 in. to 1/4 in. below the garment edge. Pin the bias, easing or stretching the strip until it fits the edge smoothly, and baste.Place the edge over a pressing cushion with the right side up. Cover theedge with a press cloth and carefully press just the edge and the bias strip. The facing shoule lie smoothly against the wrong side of the garment. If it doesn’t, release the basting and try again.Using a slipstitch or fell stitch, sew the facing to the seam allowance. Trim the bias so it’s an even 3/4 in. wide. To finish the free edge, fole it under 1/4 in., pin and baste. Using a very fine needle, sew the edge to the garment with a loose slipstitch or fell stitch. If the garment is backed, catch the backing but not the garment. Remove the bastings and press lightly.When applying a bias facing to a neckline without an opening, begin at the left shoulder seam and work toward the front neckline(this is the most difficult part of the neckline to face and, in couture, is therefore tackled first). For a bias facing at the armscye, begin at the underarm. Finish by folding one end of the bias wrong sides together on the lengthwise grain. Lightly crease the fold with your thumbnail. Fold the other end under so the folded edges match. Then slipstitch the folds together.BINDINGSAn elegant finish suitable for nearly every edge,a binding can be unobtrusive or, in a contrasting fabiric or texture, add dash to yourgarment. Bindings are made by stitching a strip of fabric to the right side of an edge, wrapping it around the edge and securing it neatly on the underside. Often finished so they’re attractive on both the right and wrong side of the garment, bindings are frequently used on transparent fabrics, two-faced fabrics and on reversible and unlined garments.In order to shape and sew bindings to curved edges easily, most fabric bindings are cut on the true bias at a 45°angel to the lengthwise grain. But if the garment edges are straight or almost straight, bingdings can be cut on either the crossgrain or lengthwise grain to enhance the design. The directions below focus on bias-cut bindings, but they can easily be adapted for nonbias strips and ribbon, although these other bindings donot take the shape of the edge as easily.Selecting the fabric for bindings is particularly important. Lightweight materials like crepe, sation, chiffon and voile are suitable for bindings on almost any shell fabric. If you wan a heavier bound edge, you could use fabrics like wool, rib-weaves, cottons and sturdy linens. But be aware that the heavier the binding fabric, the more difficult it is to work with and control its bulk, particularly at the ends.Most bindings are finished about 1/4 in. wide, but on very lightweight fabrics they can be as narrow as narrow as 1/8 in., and on bulky or heavy fabrics they can be as wide ae 1-in. Bindings can be made with either a single-layered, open strip of fabric or with a double-layered, folded strip. Obviously, bindings sewn from a double layer are stiffer and thicker because they contain more fabric, an advantage when that binding fabric is lightweight or when you want a sharply defined edge. But if the binding fabric is heavy or bulky or if the garment edge is designed to hang softly, a single-layered binding is more suitable.Generally, bindings are not applied until the garment is almost finishe—that is, until appropriate interfacings and backings have already been set, the garment fitted and all corrections made. On lined couture garments,however, the binding is frequently applied first by hand or machine, and finished wirh the lining, which covers the raw edge of the bingding..CUTTING AND STITCHING THE BIAS STRIPIf you lived in Italy, you would visit your favorite merceria, or sewing-nitions store, when you wanted to trim a design with bias bindings (I’ve looked in stores in France and England but hanve never seen fabric sold in this way). There you would find a large assortment of fabrics already cut with one edge on the bias. After you chose your fabric, a salesperson would cut a parallelogram for you, which would be ready to be cut into bias strips.In America, however, the home sewer’s fitst task in making a bias binding is to estaqblish the true bias of the fabric. This is important because if the strips are not cut exactly at a 45°angle, the finished bindings will ripple, twist and pucker. The best way to establish the true bias is with an isosceles right triangle—a drafting tool that has two sides of equal length with a 90°angel between them.Align one of the triangle’s short sides with the length-wise grain.The other side will be on the crossgrain, and the hypotenuse will mark the true bias. Mark parallellines on the bias with chalk and cut as many strips asneeded for the length of your edges (see the discussions on the following pages on single and double bindings to calculate the width of strip needed for a given finished binding width). For a short bound edge in a prominent place on the garment—for example, on a lapel—use one continuous bias strip. For longer edges, join as many strips as needed for your length. In general, it’s better to join the strips on the lengthwise grain, but if the fabric has a prominent cross-rib or horizontal stripe, the seam will be less noticeable if the seam is parallel to the stripe or rib.To join bias strips, first trim all ends of the bias strips so they’re on the desired grain—ususlly the lengthwise grain. Begin with two strips, right side up. Fold one end under 1/4 in., pin it to the other strip so the grainlines match and slip-baste at the fold. Repeat until all the strips are joined. Then, fold the basted strips together with right sides together and sew the seam with a very short machine stitch (20 stitchws/in. or 1.25mm). Press the seams flat and then press them open. Trim away the ends of the seam allowance that extend beyond the width of the strip and trim the seams to 1/8 in.Although bindings can be applied to almost any edge, the directions given here are for applying single and double bindings to a neckline, where they’re most often sewn. To prepare the garment for either a single ordouble 1/4-in.—or the width of the finished binding—below the neckline. Do not trim away the seam allowance.SINGLE BINDINGThe couture method of applying a single binding has several advantages over the regular home-sewing method. It’s begun with the right sides up, allowing you to see the binding as you shape it to fit the edge, It can also be made entirely by hand rather than machine, which results in a softer finish. To determine the most suitable width for the finished binding, experiment with fabric scraps before cutting the strips until you arrive at a sample you like.Thread-trace the garment edge, as explained on p.76, and cut the bias strips so that the width of each strip is six times the desired finished width of the binding plus 1/2-in.(To make a finished 1/4-in.wide binding, for example, cut a bias strip 2 in. wide.) Press the strip, stretching it slightlylengthwise. Fold under one long edge of the bias 1/4 in., regardless of the desired finished width, and baste 1/8 in.from the fold.Working with the right sides up, align and pin the folded edge to the garment so it barely laps the binding seamline. To apply the bias smoothly to a neckline, hold the folded edge of the strip taut when pinning it in place. Baste through all layers close to the folded edge and slip-baste the strip to the garment. Then remove the first row of basting that holds the binding flat, unfold the strip so the right sides are together and machine-stitch over the basted line. Trim the seam allowance at the neckline, remove any bastings and press lightly.Fold the binding toward the neckline and finger-press the binding seam. Wrap the binding around the neckline’s raw edge and finger-press again. Pin-baste the binding in place on the wrong side of the neckline, setting the pins just below the binding. Measure the binding width. If it’s more than 1/4 in., the finished neckline will probably be too tight. If this is the case, unpin the binding and trim the seam as needed to keep the finished binding width at 1/4 in. Then fold the raw edge under so that the folded edge touches the seamline. If the folded edge overlaps the seamline, unfold the bias and trim it as needed to make a folded edge the width you need. Baste and then permanently fell or slipstitch the folded edge to thestitched line. Remove the bastings and press lightly.Sone binding fabrics are too bulky to produce a binding that looks the same on both sides. If the design has a lining that can be applied over the binding, bulk can be reduced by leaving the binging’s raw edge flat on the wrong side of the garment instead of turning it under.Sew the binding in place by hand with short running stitches. Then trim it 1/4 in. below the seamline and apply the lining to cover the raw edge.When binding outward curves, for example, on collars and pockets, trim away the garment seam allowance. Ease the folded edge to the binding seamline so the bias is smooth at the raw edge. Then proceed as above.When binding corners on collars and lapels, a triangle of excess fabric will form at the corner. Use a needle to shape the triangle into a miter and baste it in place. Then proceed as above.DOUBLE BINDINGAmerican couturier Charles Kleibacker had an unusual method for applying a double binding, which he used to finish and trim the edges of his lace designs and to sew wide bias bands in the place of skirt hems. He laid the bias strip flat on the table and applied the garment to the bias strip, instead of the reverse. Working this way makes it easier to control the bias binding and produces fantastic results.Because the finished binding for this application method will consist of atleast seven layers, the weight and bulk of the binding fabric are particularly important and must be taken into account when deciding the width of the finished bias. Medium-weight fabrics such as four-ply silk and silk linen are suitable for bindings as narrow as 1/8 in., lightweight crepes, chiffon and organza can be used. The instructions here are for a finished binding 1/4 in. wide on a neckline. They can be modified to make a very narrow 1/8-in. wide binding or one that’s much wider.Begin with a bias strip four times the finished width plus two 1/2-in. wide seam allowances.(For a finished binding 1/4 in. wide, for example, the strip will be 2 in. wide) With the wrong sides together, fold the strip in half lengthwise and baste about 1/8 in. from the fold. Lay the strip flat on the table with the fold toward you. Using chalk or pins, mark a line along the length of the strip that is an even distance from the folded edge and equal to twice the finished binding width. (For a 1/4-in. wide binding, make 1/2 in. from the fold.) Put a second row of basting through both layers along this line to mark the binding seamline.On the garment, thread-trace the neckline and seamline for the binding, as explained on p.76. Spread the garment flat on the table with the edge to be bound toward you and right side up. Then, using the thread-traced binding seamline as a guide, fold the neck edge of the garment under 1/4in.To accomplish this neatly and without stretching the neckline, clip it as needed and fold under one small section at a time. Match and pin the folede edge of the neckline to the binding seamline on the bias strip (the one father from the folded edge of the bias strip), as shown above. Baste the garment to the binding, using a small fell stitch or slipbasting. Reposition the layers with right sides together. Machine-stitch over the basted seamline. Remove the basting and press lightly.Trim away the original thread-traced seam allowance on the neckline to reduce bulk. Wrap the binding around this raw edge. The binding’s folded edge should just meet the stitches line on the wrong side of the neckline, and the finished binding should measure 1/4 in. wide. If it doesn’t, trim the neckline a little more. Grade the seam allowances as needed. Pin the binding in place, setting the pins at an angle with the heads toward the neckline and baste. Hold the edge in one hand with the wrong side toward you, and using a fell stitch, sew the folded edge to the stitched line.FINISHING THE BINDING’S ENDSBindings often begin and end at garment openings such as neckline plackets and zipper closures. For a smooth, inconspicuous finish, fold the ends of the binding to the wrong side before wrapping the bingding around the edge.Complete the opening and trim away any excess bulk before beginning the binding. Pin the bias to the garment, allowing a 1-in. extension of the bias strip on each side of the opening to the wrong side. Trim to about 1/2 in. and sew it with a catchstitch to the wrong sides of the bias strip and garment. Repeat for the other end. If the opening has a hook, eye or button loop, sew it in place now so the end will be hidden between the layers of the binding.On couture and good-quality ready-to-wear garments, bindings applied to edges without openings (for example, circular necklines, armholes, sleeve edges and skirt hems) usually have the ends seamed on grain. Before beginning such bindings, decide where to locate the seam so it will be as inconspicuous as possible on the finished design. On necklines, the seam is usually deemed least conspicuous at the left shoulder; on armholes and the edges of sleeves, under the arm; snd, on hems, at the left side seam.Prepare a bias strip that’s long enough to allow for a 4-in. tail on each end of the strip. Pin the bias strip to the garment. Fold back one tail on the lengthwise grain with wrong sides of the bias together and pin it in place. Repeat for the other end so the folded edges meet.Slip-baste the folds together. Unpin the bias about 1-in. on either side of the basted seamlineso you can stitch the basted seam easily, or use a short backstitch to sew the seam by hand. Press the seam open and trim the seam allowances to 1/4 in. Repin the bias to the edge and complete the binding, which encases the raw edges of the seam.译文时装缝纫技术之服装边缘处理工艺衣服的边缘如果不以某种方式处理，这件衣服就会显得混乱和不完整。
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设计类外文翻译贯穿绿色工程的12原则近年来,许多报纸、书籍、和会议的主题围绕出资行星上的负面影响,人类在其能力来维系生命。
常,这些讨论,具体目标也应运而生,如,最大限度地减少浪费,接近可持续发展。
目标语句可以提供非常有用的一个视觉所需要的实现,而且多数的这些dis-cussions的重要组成部分,有助于视力。
然而,目标是当他们成为reali-ty才生效。
方法正在研制达到这些目标跨学门、工业、和部门。
很明显,然而,这些方法目前既不系统也不全面。
绿色工程(11)着重论述如何通过科学和技术能否实现可持续发展(12 - 14)。
12原则的绿色工程(参见页),提供了一个框架下对科学家和en-gineers从事在设计新材料、产品、过程和系统,是“良性”tohuman健康和环境。
一个设计基于12原则行走基线工程质量和安全规格以considerenvironmental、经济、社会因素的影响。
宽的适用性的原则是重要的。
当处理设计建筑,不管它是toconstruct化合物分子结构要求、产品体系结构,以创造一个汽车、城市新建筑的建造一个city-the相同的绿色工程原则必须适用、有效和适当的。
否则,这些不会原则,而是一个列表的use-ful技术,已经成功地demon-strated特定条件下。
在这篇文章中,我们说明这些原则可以应用在一系列的鳞片。
也适用于查看12原则para-meters在一个复杂的、完整的体系。
就像每一个参数优化系统不能在任何一个时间,特别是当他们在interdepen-dent,也是同样的道理这些原则。
有一些案例表明,协同的成功应用的一个最重要的原则提出了一个或更多的其他人。
在其他情况下,一个平衡的原则将再保险——quired优化系统整体解决方案。
然而,也有一些两个基本概念,de-signers应该努力整合在每opportuni-ty:生命周期的考虑和第一的原则,inherency的绿色工程。
生命周期和inherency材料和能量的生命周期阶段进入每一个每一件产品和过程有他们自己的生活周期。
如果一个产品是有益于环保但是由危险废物或不可再生物质,其im-pacts基本上已被转移到另一边的整体生活周期。
例如,如果一个产品或过程具有高效节能甚至能源发电(例如,pho-tovoltaics),但生产过程中影响程度consumesenergy抵消任何能量的收获,没有樊笼可持续发展优势。
因此,de-signers应该考虑的整个生命周期,包括物料及能源的投入。
生命周期的物料及能源开始采集(例如,挖掘、钻孔、收获),然后移动整个制造,分销,使用,和结束的生命。
这是必须考虑所有的im-pacts申请时,是需要绿色工程的原则。
这一策略的选择进行了补充,更能减低我们固有的良性输入在生命周期阶段的环境影响。
使产品、过程和系统更有益于环保一般情况下遵循的两个基本方法:变化的内在属性的系统或改变的情况下/条件时才能被感觉到的制度。
虽然inherency可能,ex-ample固有的毒性,降低;一个有条件的一种化学物质,包括控制re-lease变化的,以及是否接触,有毒化学物质。
Inherency者优先,原因也是多方面的,最重要的是,以避免“失败”。
依靠tech-nological控制系统环境,如空气净化器或废水的处理,有一个潜在的失败,这可能导致重大危险到人健康和自然系统。
然而,随着更多的inher-ently良性设计,无论在条件或情况下,变化的本质系统不能失败。
在这些情况下,该系统的固有属性是预先定义的,因此,它经常是很必要的,通过提高系统的变化情况和条件。
虽然技术和经济因素的影响,往往可以排除通过alter-native系统设计具有更多的固有的良性、渐进性的变革在这种情况下,可以有很重大的影响,整个系统。
选择一个ex-ample之间的个人trans-portation设计在最有益于环保和可持续的方式与设计了一个汽油发动的运动型多用途车是最能符合可持续发展。
12原则提供了一个绿色工程结构制造出和评估这些设计元素相关的最大限度的可持续发展。
工程师可以使用这些原则为指导,以帮助确保设计的产品、过程或系统有基本的元件,条件,和被需要更稳定。
原则1虽然带来的负面影响的固有的有害物质,physi-cal(无论是毒理、乃至全球)可能会降到最低,这是完成只有通过一项重要的投资的时候,capi-tal、材料、能源资源。
一般来说,这不是一个在经济上还是在环境可持续发展的途径。
设计师应评估内在充分选中的物质和能量的输入en-sure它们是一种良性的尽可能的第一步一个可持续发展的产品、过程或系统。
同样,分子的设计师正在开发种方法和技术ma-terial创造固有的良性及能源(15 - 18节)。
为案例,习惯的冒险投入是选择、危害要么会被移除的过程中,通常在净化或清除步骤或者纳入最后的结果。
危害消除过程从最终的产品以优化操作条件需要持续监控和遏制和也有可能需要最终搬家到一个永久的远距离的贮存、处置设施。
每一个步骤需要改造的安全措施以保证也可能失败。
如果这些危险并不是移除而是并入到最终的产品吗?结合灾害策略的产品或过程只要灾害是con-tinually 100%回收再利用确实存在,但这ap-proach支出需要资源进行监测和控制在整个危害的一生。
进而,这些方法在很大程度上取决于运输这些危险保持“闭环”骑自行车,从而增加的风险,通过acci-dents释放泄露、和泄漏。
最理想的情况是,输入到系统将会减少有害,这significant-ly固有减少失败的风险和资源ex-pended上的控制,监测,和遏制。
原则2:预防而不是治疗建议,为生产过程或服务体系,是“zero-waste”经常批评为ig-noring热力学定律和enthalpic的考虑。
很重要的一点是,常常被忽视的浪费是人类的概念。
换句话说,根本就没有什么内在能量或一种物质,使它成为一个废物。
而它的结果是由于缺乏使用,还没有想像或实现。
正因为如此,废物被指定到物质流和能量,cur-rent过程或系统无法有效地ex-ploit,以便更有效益地使用。
无论其性质、生成和处理废物,ef-fort耗费时间和金钱。
此外,危险废物de-mands更大的追加投资,用于监测和控制。
虽然它似乎是显而易见的,而让genera-tion 应当防止或避免,无论possi-ble有大量的例子中,它是不会因疏忽而产生的;相反,废料的产生是不假思索地设计成这一过程。
waste-free技术设计,在有针对性的对任何规模都是基于相同的基本理念:输入是设计的一部分,你想要的结果。
这种欺诈-除了被描述为“在分子尺度原子经济”(18),可以延伸到设计的“物质经济量表”。
在现阶段,此原理可说明当前发电系统的设计,基于化石燃料产生浪费在每一个固有的生命周期阶段。
虽然浪费也是过程中产生的开采与加工过程中产生的,多数是使用。
燃烧化石燃料释放温室气体和微粒,是造成全球气候变化的影响,以及随后(19)。
然而,发电系统不需要产生废物,以融合的能量。
虽然还未实现,聚变能源可以移动能量系统迈向永续性(20)。
融合将消除其释放的化学燃烧化石燃料等工艺,因为没有被使用。
此外,fu-sion能量不会形成危险的核分裂产物相联系的核能源。
运用这一策略,以能量系统说明了企业产品、工艺、和其他系统可用于防止生产废弃物通过元素的结构设计。
原则3:设计要分离。
产品sepa-ration和净化消费最多的能量和物质在许多的制造流程。
许多tra-ditional分离要求的方法largeamounts有害溶剂,而其他的一些con-sume大量的能源作为热量或压力。
设计适当的self-separa-tion征费许可证产品采用内在物理/化学性质,如溶解度和挥发性而不是减少诱导条件下,浪费,减少了pro-cessing次。
类似的设计策略可以应用在天平,这样最终的产品、过程或系统从零件时就形成了期望的性质。
该方法最大限度地减少了能量和物质的必要的隔离从com-plicated期望输出矩阵的extra-neous不良而毫无价值的事情。
此外,对元件的不必要的矩阵通常归入浪费,这就要求的时间、金钱和资源处理、运输、处置,和可能的监测。
另外,设计决策的影响在最早的阶段可以轻松的产品分离、纯化为以后的compo-nents再生利用。
在经济和技术局限在sepa-rating材料和部件的最大障碍,恢复,回收和再利用(21)。
这些障碍是可以克服per-manent债券以避免两种不同材料之间wher-ever成为可能。
紧固件,这种设计是为拆卸,应当纳入基本设计策略在所有尺度”。
“可逆紧固件,包括螺纹fasten-ers,可显著提高材料的recov-ery缓解、回收和再利用在细胞tele-phones到汽车。
considera征费和纯化的配套为测量结果避免了需要耗费材料和en-ergy收割期望输出横跨所有设计尺度下和整个生命周期。
在分子尺度,例如、分离和纯化工艺,如柱层析和蒸馏通常是低效率的。
色谱柱可以要求大量的危险溶剂(22),而蒸馏器-消耗大量的能量螺旋桨,无论是从制冷和制热需求。
然而,如果化学反应对self-separate 1483产品都可以从反应介质,它会消除需要这些额外的资源。
聚合物,例如,可以用来控制的溶解度和催化剂基质、配体、分离、回收再利用。
考虑到分离和纯化征费避而不需要ex-pend物料及能源收获预期的输出在所有设计尺度下和整个的生活循环(23)。
原则4:最大限度地提高质量、能量、空间和时间效率。
因为流程和系统经常用更多的时间、空间、精力、物质比要求的,结果可能会是分类为“无效率的”,但后果往往是广泛分布于整个产品和过程的生活周期。
如果一个系统设计,使用,或直接以低于max-imum效率、资源被浪费了,生命周期。
同样的设计工具常用的工程师,以提高工作效率将会更加广泛应用于增加强度。
那是,空间和时间的问题可以被认为是随着物质和能量流,减少浪费。
此外,在优化系统需要实时监控,保证系统操作con-tinues在既定设计条件。
历史上,只有一个部分的可用的体积oflarge批量反应器在化工制造已经普遍使用,在反应过程中,常常会出现在稀释时期水平远远超过要求。
通过过程强化技术,如microreactors连续运作在非常低,体积与高效搅拌、高产能获得少量的ma-terial(24)。
类似的策略设计为最高的效率和强度可以应用在分子、pro-duct和pro-cess。
在一些例子来说明这ap-plies尺度的层级系统in-clude spin-n我n克- s kreactors re-placing d 我批反应器(24)、粉末coatingsinstead的油漆、数字informationrather印刷媒体,比消除生态城市扩张的植物。