A networked engineering portal to support distributed supply chain partnership
工程职称英语试题及答案

工程职称英语试题及答案一、选择题(每题1分,共10分)1. The term "engineering" refers to:A. A type of professionB. A specific disciplineC. A method of constructionD. A type of technology答案:A2. Which of the following is not a characteristic of engineering?A. SystematicB. PracticalC. CreativeD. Static答案:D3. The basic elements of engineering include:A. Materials, energy, and informationB. Money, manpower, and materialsC. Information, technology, and moneyD. Energy, manpower, and technology答案:A4. The primary goal of engineering is to:A. Solve practical problemsB. Pursue scientific truthC. Achieve artistic expressionD. Maximize economic benefits答案:A5. The role of engineering in society includes:A. Enhancing the quality of lifeB. Promoting social progressC. Protecting the environmentD. All of the above答案:D6. The engineering design process generally includes the following stages except:A. Problem identificationB. Conceptual designC. FabricationD. Market research答案:D7. Which of the following is not a common method of engineering analysis?A. Mathematical modelingB. Experimental researchC. Literature reviewD. Computer simulation答案:C8. In engineering, the concept of "sustainability" refers to:A. Economic sustainabilityB. Environmental sustainabilityC. Social sustainabilityD. All of the above答案:D9. The "Internet of Things" (IoT) is related to engineering because it:A. Enhances communication capabilitiesB. Facilitates remote monitoring and controlC. Reduces the need for human laborD. B and C only答案:B10. The acronym "CAD" stands for:A. Computer-Aided DesignB. Computer-Aided DraftingC. Computer-Aided DevelopmentD. Computer-Aided Diagnostics答案:A二、填空题(每空1分,共10分)11. The ________ of an engineering project refers to its ability to meet the needs of the users.答案:functionality12. In engineering, the term "feasibility study" is used to evaluate the ________ and practicality of a project.答案:viability13. The process of converting raw materials into finished products is known as ________.答案:manufacturing14. The use of renewable energy sources is an example of engineering efforts to achieve ________.答案:sustainability15. A ________ is a tool that engineers use to createdetailed drawings of their designs.答案:CAD software16. The ________ of a structure refers to its ability to withstand loads without breaking or deforming excessively.答案:stability17. In the context of engineering, "innovation" often involves the development of new ________ or processes.答案:products18. The ________ of a project refers to the total cost of all the resources required to complete it.答案:budget19. Environmental impact assessments are conducted to evaluate the potential ________ of a project on the naturalsurroundings.答案:effects20. The term "mechatronics" combines elements of mechanical engineering, electronics, and ________.答案:computer engineering三、简答题(每题5分,共20分)21. What are the key factors that engineers consider when designing a bridge?答案:Key factors include the bridge's intended load capacity, the materials to be used, the environmental conditions it will be subjected to, and the overall cost of construction.22. Explain the difference between "prototype" and "final product" in the context of engineering.答案:A prototype is an early sample or model of aproject used to test concepts and processes. The finalproduct is the completed, polished version that is ready for use or distribution.23. What is the significance of "risk assessment" in engineering projects?答案:Risk assessment is significant as it helps identify potential hazards and assess their likelihood and impact.This allows engineers to take preventive measures and ensure the safety and success of the project.24. Describe the role of "project management" in engineering.答案:Project management in engineering involves planning,organizing, and controlling resources to achieve specific project goals. It includes scheduling, budgeting, and coordinating the efforts of the team to ensure timely completion and adherence to quality standards.四、论述题。
(完整版)川大软院计网选择题答案Chapter1(含答案)

(完整版)川大软院计网选择题答案Chapter1(含答案)1.1 In the following options, which does not define in protocol? ( D )A the format of messages exchanged between two or more communicatingentitiesB the order of messages exchanged between two or more communicating entitiesC the actions taken on the transmission of a message or other eventD the transmission signals are digital signals or analog signals1.2 In the following options, which is defined in protocol? ( A )A the actions taken on the transmission and/or receipt of a message or other eventB the objects exchanged between communicating entitiesC the content in the exchanged messagesD the location of the hosts1.3 An application can rely on the connection to deliver all of its data without error and in the proper order. The sentence describes (C ).A flow controlB congestion-controlC reliable data transferD connection-oriented service1.4 The Internet’s connection-oriented service has a name, it is ( A ).A TCPB UDPC TCP/IPD IP1.5 The Internet’s connectionless service is called ( B ).A TCPB UDPC TCP/IPD IP1.6 Which of the following nodes belongs to the network core?CA. a Web ServerB. a Host with Win2003 ServerC. a Router with NAT serviceD. a Supernode on Skype Network1.7 In the Internet, the equivalent concept to end systems is ( )A.A hostsB serversC clientsD routers1.8 In the Internet, end systems are connected together by ( C ).A copper wireB coaxial cableC communication linksD fiber optics1.9 End systems access to the Internet through its (C ).A modemsB protocolsC ISPD sockets1.10 In the following options, which belongs to the network core? ( B )A end systemsB routersC clientsD servers1.11 End systems, packet switches, and other pieces of the Internet, run ( D ) that control the sending and receiving of information within the Internet.A programsB processesC applicationsD protocols1.12 The internet allows ( D ) running on its end systems to exchange data with each other.A clients applicationsB server applicationsC P2P applicationsD distributed applications1.13 The protocols of various layers are called ( A ).A the protocol stackB TCP/IPC ISPD network protocol1.14 In the OSI reference model, the upper layers of the OSI model are, in correct orderDA Session, application, presentationB Session, presentation, applicationC Session, application, presentation, physicalD Application, presentation, session1.15 The lower layers of the OSI model are, in correct orderDA physical, system, network, logicalB physical, logical, network, systemC physical, transport, network, data linkD physical, data link, network, transport1.16 The Internet Protocol (IP) generally corresponds to which OSI layer?AA Network (layer three)B Transport (layer four)C Data link (layer two)D Session (layer five)1.17 What layer of the OSI model is designed to perform error detection functions?BA PhysicalB Data linkC NetworkD transport1.18 Which of the following protocol layers is not explicitly part of the Internet Protocol Stack? _____B____A. application layerB. session layerC. data link layerD. transport layer1.19 The 5-PDU is called__A_A. messageB. segmentC. datagramD. frame1.20 The Internet’s network l ayer is responsible for moving network-layer packets known as B( ) from one host to another.A frameB datagramC segmentD message1.21 Transport-layer packets are called:BA. messageB. segmentC. datagramD. frame1.22 The units of data exchanged by a link-layer protocol are called ( A).A FramesB SegmentsC DatagramsD bit streams1.23 There are two fundamental approaches to building a network core, ( B ) and packet switching.A electrical current switchingB circuit switchingC data switchingD message switching1.24 Datagram networks and virtual-circuit networks differ in that ( C ).A datagram networks are circuit-switched networks, and virtual-circuit networksare packet-switched networks.B datagram networks are packet-switched networks, and virtual-circuit networksare circuit-switched networks.C datagram networks use destination addresses and virtual-circuit networks useVC. numbers to forward packets toward their destination.D datagram networks use VC. numbers and virtual-circuit networks usedestination addresses to forward packets toward their destination.1.25 (A ) means that the switch must receive the entire packet before it can begin to transmit the first bit of the packet onto the outbound link.A Store-and-forward transmissionB FDMC End-to-end connectionD TDM1.26 In ( C ) networks, the resources needed along a path to provide for communication between the end system are reserved for the duration of the communication session.A packet-switchedB data-switchedC circuit-switchedD message-switched1.27 In ( A ) networks, the resources are not reserved; a session’s messages use the resources on demand, and as a consequence, may have to wait for access to communication link.A packet-switchedB data-switchedC circuit-switchedD message-switched1.28 In a circuit-switched network, if each link has n circuits, for each link used by the end-to-end connection, the connection gets ( A) of the link’s bandwidth for the duration of theconnection.A a fraction 1/nB allC 1/2D n times1.29 For (C ), the transmission rate of a circuit is equal to the frame rate multiplied by the number of bits in a slot.A CDMAB packet-switched networkC TDMD FDM1.30 The network that forwards packets according to host destination addresses is called ( D) network.A circuit-switchedB packet-switchedC virtual-circuitD datagram1.31 The network that forwards packets according to virtual-circuit numbers is called ( C ) network.A circuit-switchedB packet-switchedC virtual-circuitD datagram1.32 The time required to propagate from the beginning of the link to the next router is ( C).A queuing delayB processing delayC propagation delayD transmission delay1.33 Processing delay does not include the time to (B ).A examine the packet’s headerB wait to transmit the packet onto the linkC determine where to direct the packetD check bit-error in the packet1.34 In the following four descriptions, which one is correct? ( C)A The traffic intensity must be greater than 1.B The fraction of lost packets increases as the traffic intensity decreases.C If the traffic intensity is close to zero, the average queuing delay will be closeto zero.D If the traffic intensity is close to one, the average queuing delay will be closeto one.1.35 Suppose, a is the average rate at which packets arrive at the queue, R is the transmission rate, and all packets consist of L bits, then the traffic intensity is ( B ),A LR/aB La/RC Ra/LD LR/a1.36 Suppose there is exactly one packet switch between a sending host and a receiving host. The transmission rates between the sending host and the switch and between the switch and the receiving host are R1 and R2, respectively. Assuming that the switch uses store-and-forward packet switching, what is the total end-to-end delay to send a packet of length L? (Ignore queuing delay, propagation delay, and processing delay.) ( A )A L/R1+L/R2B L/R1C L/R2D none of the above1.37 We are sending a 30 Mbit MP3 file from a source host to a destination host. Suppose there is only one link between source and destination and the link has a transmission rate of 10 Mbps. Assume that the propagation speed is 2 * 108 meters/sec, and the distance between source and destination is 10,000 km. Also suppose that message switching is used, with the message consisting of the entire MP3 file. How many bits will the source have transmitted when the first bit arrives at the destination?CA. 1 bitB. 30,000,000 bitsC. 500,000 bitsD. none of the above1.38 In the following entries, which is not a kind of access network?(D )A residential accessB company accessC wireless accessD local access1.39 The following technologies may be used for residential access, exceptDA. HFCB. DSLC. Dial-up modemD. FDDI1.40 Which kind of media is not a guided media? ( D)A twisted-pair copper wireB a coaxial cableC fiber opticsD digital satellite channel。
对大学期望的英语作文

When considering the expectations one might have for university life,its important to remember that this is a transformative period in a students life.Its a time for learning, growing,and discovering ones potential.Here are some key aspects that one might expect from their university experience:1.Academic Excellence:Universities are expected to provide a rigorous academic environment where students can challenge themselves and gain a deep understanding of their chosen field.This includes access to knowledgeable professors,a wide range of courses,and opportunities for research and collaboration.2.Personal Development:Beyond academics,university is a place for personal growth. Students should expect to develop critical thinking skills,leadership qualities,and a sense of independence.This is often achieved through extracurricular activities,clubs,and societies.3.Cultural Exposure:Universities are melting pots of cultures,where students from diverse backgrounds come together.This provides an opportunity for students to learn about different cultures,languages,and perspectives,enriching their worldview.working Opportunities:Building a professional network is crucial for future career prospects.Students should expect to meet peers,professors,and alumni who can provide guidance,mentorship,and potential job opportunities.5.Campus Life:The university campus is not just a place for studying its also a home away from home.Students should expect a vibrant social life,with events,sports,and recreational activities that contribute to a wellrounded experience.6.Career Preparation:Universities should offer career services to help students prepare for the job market.This includes career counseling,internships,and job fairs that connect students with potential employers.7.Financial Support:The cost of higher education can be a burden for many students. Therefore,its important for universities to provide financial aid,scholarships,and workstudy programs to support students in achieving their educational goals.8.Mentorship and Guidance:Students should expect to have access to mentors and advisors who can help them navigate their academic journey and make informed decisions about their future.9.Innovation and Creativity:Universities are often at the forefront of innovation.Students should expect to be encouraged to think creatively and to be part of projects that push the boundaries of knowledge.10.Global Opportunities:In an increasingly globalized world,students should expect opportunities to study abroad,participate in international conferences,or engage in global projects that broaden their horizons.In conclusion,the university experience is a multifaceted one that goes beyond the classroom.Its a time for students to explore their interests,challenge their beliefs,and prepare for their future in a supportive and stimulating environment.。
工程英语测试题及答案

工程英语测试题及答案一、选择题(每题2分,共20分)1. What is the term used to describe the process of turning raw materials into finished products?A. FabricationB. AssemblyC. MachiningD. Casting答案:A2. The primary function of a ________ is to convert electrical energy into mechanical energy.A. MotorB. GeneratorC. TransformerD. Inverter答案:A3. In engineering, the term "stress" refers to:A. The internal resistance of a material to deformationB. The force applied to a materialC. The change in shape of a materialD. The rate of change of force答案:A4. Which of the following is not a type of welding process?A. Arc weldingB. Gas weldingC. Ultrasonic weldingD. Friction welding答案:C5. The process of designing and building a structure is known as:A. EngineeringB. ArchitectureC. ConstructionD. All of the above答案:D6. What does the abbreviation "CAD" stand for in the field of engineering?A. Computer-Aided DesignB. Computer-Aided DraftingC. Computer-Aided DevelopmentD. Computer-Aided Documentation答案:A7. The SI unit for pressure is:A. PascalB. NewtonC. JouleD. Watt答案:A8. A ________ is a type of joint that allows for relative movement between connected parts.A. Rigid jointB. Revolute jointC. Fixed jointD. Pin joint答案:B9. The process of removing material from an object to achieve the desired shape is known as:A. MachiningB. CastingC. ForgingD. Extrusion答案:A10. In engineering, the term "specification" refers to:A. A detailed description of the requirements of aprojectB. A list of materials to be used in a projectC. The estimated cost of a projectD. The timeline for a project答案:A二、填空题(每题1分,共10分)11. The ________ is the process of cutting a flat surface ona material.答案:sawing12. A ________ is a type of bearing that allows for rotation.答案:ball bearing13. The term "gearing" refers to the use of gears to transmit ________.答案:motion14. The ________ is the study of the properties of materials.答案:material science15. In a hydraulic system, a ________ is used to control the flow of fluid.答案:valve16. The ________ is the process of heating and cooling a material to alter its physical properties.答案:heat treatment17. The ________ is a tool used to measure the hardness of a material.答案:hardness tester18. A ________ is a type of joint that connects two parts ata fixed angle.答案: hinge joint19. The ________ is the process of joining two pieces ofmetal by heating them to a molten state.答案:fusion welding20. The ________ is the study of the behavior of structures under load.答案:structural analysis三、简答题(每题5分,共30分)21. Define the term "mechanical advantage" in engineering.答案:Mechanical advantage is the ratio of output force to input force in a simple machine, indicating how much the machine amplifies the force applied to it.22. Explain the concept of "factor of safety" in engineering design.答案:The factor of safety is a ratio used in engineering to ensure that a structure or component can withstand loads beyond the maximum expected in service, providing a margin of safety against failure.23. What is the purpose of a "stress-strain curve" in material testing?答案:A stress-strain curve is a graphical representation of the relationship between the stress applied to a material and the resulting strain, used to determine the material's mechanical properties such as elasticity, yield strength, and ultimate strength.24. Describe the difference between "static" and "dynamic" loads in engineering.答案:Static loads are constant forces that do not changeover time, while dynamic loads are forces that vary in magnitude or direction over time, often due to movement or vibrations.25. What is "creep" in the context of material behavior under load?答案:Creep。
往年招飞英语试题及答案

往年招飞英语试题及答案一、选择题(共20分,每题2分)1. Which of the following is NOT a reason for someone to choose a career in the military?A. Serving the countryB. Financial benefitsC. Travel opportunitiesD. Personal interest in fashion2. The term "aviation" refers to the activities related to:A. Space explorationB. Air travel and aircraft operationC. Sea transportationD. Land transportation3. What does the abbreviation "NATO" stand for?A. North Atlantic Treaty OrganizationB. National Aeronautics and Space AdministrationC. National Association of Teachers of AviationD. New American Transportation Organization4. In the context of military aviation, "ejection seat" is used to:A. Adjust the pilot's seating position for comfortB. Quickly remove the pilot from the aircraft in an emergencyC. Allow the pilot to rest during long flightsD. Help the pilot enter the aircraft5. The phrase "cleared for takeoff" means that the aircraft has:A. Been inspected and is ready for flightB. Received permission from air traffic control to begin its departureC. Completed its taxi to the runwayD. Been given priority over other aircraft6. What is the primary purpose of a "flight simulator"?A. To provide entertainment for the publicB. To train pilots in various flight conditions without riskC. To test the durability of aircraft componentsD. To simulate space travel for astronauts7. The term "airspeed" refers to the speed of an aircraft relative to:A. The groundB. The surrounding airC. The speed of soundD. The wind8. What does "VFR" stand for in aviation?A. Visual Flight RulesB. Very Fast ResponseC. Variable Flight RateD. Vertical Flight Regulations9. The "black box" in an aircraft is used to:A. Record flight data and cockpit conversationsB. Store in-flight entertainmentC. Control the aircraft's navigation systemD. Communicate with air traffic control10. Which of the following is a common reason for a pilot to declare an emergency?A. Requesting a faster route due to time constraintsB. Experiencing a minor technical issueC. Encountering severe weather conditions or equipment failureD. Requesting priority for landing due to a VIP on board二、填空题(共10分,每题2分)11. The international distress signal is three repeated letters or numbers: _______.12. A pilot must maintain a safe _______ when flying in controlled airspace.13. The acronym "IFR" stands for _______.14. The term "stall" in aviation refers to a situation where the aircraft is flying at an airspeed that is _______ to maintain level flight.15. A "transponder" is a device used in aviation to help an aircraft be identified by _______.三、阅读理解(共30分,每 passage 10分,每题2分)Passage 1[Text略]16. What is the main topic of the passage?A. The history of aviationB. The benefits of military serviceC. The requirements for becoming a pilotD. The technology used in modern aircraft17. According to the passage, what is one of the key physical requirements for pilots?A. Excellent visionB. A specific height requirementC. The ability to speak multiple languagesD. A high level of mathematical skill18. Why is teamwork considered important in aviation?A. Pilots often work alone.B. Pilots need to coordinate with ground staff and other pilots.C. Pilots are required to compete against each other.D. Pilots have to manage multiple tasks simultaneously.19. What does the passage suggest about the importance of physical fitness for pilots?A. It is not a significant factor.B. It is essential for the job.C. It is only necessary for military pilots.D. It is less important than technical skills.20. What is one way the passage mentions to improve one's chances of being selected as a pilot?A. By having a strong family background in aviation.B. By excelling in physical education classes.C. By gaining experience in leadership roles.D. By specializing in aeronautical engineering.Passage 2[Text略]21-25. [题目略]四、完形填空(共20分,每题2分)[Text略]26-35. [题目略]五、写作(共20分)36. Write an essay of about 200 words on the topic "The Role of Technology in Modern Aviation". Your essay should cover the following points:- The importance of technology in aviation- Examples of technological advancements in aircraft- The impact of。
汉译英_高级职称

The mistake escaped my notice.
9.只有在显微镜下才能看见红血球。
A microscope is needed (for us) to see red cells.
10.2000年奥运会将在悉尼举行。
Sydneywill host (be the host city for) the 2000 Olympic Games.
After a careful check of the blueprint, they made comments on his design.
6.据说在质量方面这种仪器是优越的。
It is said that this instrument is high in quality.
2.不同国家的社会习俗往往大相径庭。
Social customs are usually different from country to country.
3.我们应该尽我们最大的努力防止这类事故再次发生。
We should do our best to prevent this kind of accident from happening again.
At the end of this century, the world population will be over six billion.
2.去年,这个国家的工农业总产值为两千亿美元。
Last year, the general output value of industry and agriculture of this country was two hundred billion dollars.
DNV-OS-C201

OFFSHORE STANDARDD ET N ORSKE VERITASDNV-OS-C201STRUCTURAL DESIGN OF OFFSHOREUNITS (WSD METHOD)APRIL 2005Since issued in print (April 2005), this booklet has been amended, latest in April 2006.See the reference to “Amendments and Corrections” on the next page.Comments may be sent by e-mail to rules@For subscription orders or information about subscription terms, please use distribution@Comprehensive information about DNV services, research and publications can be found at http :// , or can be obtained from DNV,Veritasveien 1, NO-1322 Høvik, Norway; Tel +47 67 57 99 00, Fax +47 67 57 99 11.© Det Norske Veritas. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, including photocopying and recording, without the prior written consent of Det Norske puter Typesetting (FM+SGML) by Det Norske Veritas.Printed in Norway.If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall pay compensation to such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that the maximum compen-sation shall never exceed USD 2 million.In this provision "Det Norske Veritas" shall mean the Foundation Det Norske Veritas as well as all its subsidiaries, directors, officers, employees, agents and any other acting on behalf of Det Norske Veritas.FOREWORDDET NORSKE VERITAS (DNV) is an autonomous and independent foundation with the objectives of safeguarding life, prop-erty and the environment, at sea and onshore. DNV undertakes classification, certification, and other verification and consultancy services relating to quality of ships, offshore units and installations, and onshore industries worldwide, and carries out research in relation to these functions.DNV Offshore Codes consist of a three level hierarchy of documents:—Offshore Service Specifications. Provide principles and procedures of DNV classification, certification, verification and con-sultancy services.—Offshore Standards. Provide technical provisions and acceptance criteria for general use by the offshore industry as well asthe technical basis for DNV offshore services.—Recommended Practices. Provide proven technology and sound engineering practice as well as guidance for the higher levelOffshore Service Specifications and Offshore Standards.DNV Offshore Codes are offered within the following areas:A)Qualification, Quality and Safety Methodology B)Materials Technology C)Structures D)SystemsE)Special Facilities F)Pipelines and Risers G)Asset Operation H)Marine Operations J)Wind TurbinesAmendments and CorrectionsThis document is valid until superseded by a new revision. Minor amendments and corrections will be published in a separate document normally updated twice per year (April and October).For a complete listing of the changes, see the “Amendments and Corrections” document located at: /technologyservices/, “Offshore Rules & Standards”, “Viewing Area”.The electronic web-versions of the DNV Offshore Codes will be regularly updated to include these amendments and corrections.Amended April 2006,Offshore Standard DNV-OS-C201, April 2005 see note on front cover Changes – Page 3Changes April 2005—Sec.1. Unification of requirements, level of references, terms, definitions, lay-out, text, etc. with the LRFD stand-ards, i.e. general standard (DNV-OS-C101), the standards for various objects (DNV-OS-C102 to DNV-OS-C106), as well as the fabrication standard (DNV-OS-C401). —Sec.1 & Sec.2. Definition and application of design tem-perature and service temperature has been updated, and the terminology co-ordinated with the LRFD standards.—Sec.4. Overall conditions for fracture mechanics (FM) testing, and post weld heat treatment (PWHT) transferred here (from DNV-OS-C401). Requirements to FM adjusted to reflect results of more recent research work. —Sec.5. References to the more recent Recommended Prac-tices introduced e.g. DNV-RP-C201 (for Plates), updating references to CN 30.1.—Sec.3 D300. Specified tank pressures are harmonised with similar formulas in the LRFD standards, while simultane-ously attempted simplified and clarified.—Sec.11 to Sec.14. (Ref. to the various objects.) Formulas for sea pressure during transit are reorganised and clari-fied, improving readability.—Sec.12. Text covering redundancy and detailed design re-vised in line with DNV-OS-C104 (and the previous MOU-rules).—Sec.13. Text regarding the topics of tendon fracture me-chanics, composite tendons, and stability, as well as the CMC requirements are all updated, bringing the text in line with most recent revision of DNV-OS-C105.—Sec.14. Text updated in line with ongoing revision of DNV-OS-C106.D ET N ORSKE V ERITASOffshore Standard DNV-OS-C201, April 2005Amended April 2006, Page 4 – Changes see note on front coverD ET N ORSKE V ERITASAmended April 2006,Offshore Standard DNV-OS-C201, April 2005 see note on front cover Contents – Page 5CONTENTSSec. 1Introduction (9)A.General (9)A100Introduction (9)A200Objectives (9)A300Scope and application (9)A400Other than DNV codes (9)A500Classification (9)B.References (9)B100General (9)C.Definitions (10)C100Verbal forms (10)C200Terms (10)D.Abbreviations and Symbols (12)D100Abbreviations (12)D200Symbols (12)Sec. 2Design Principles (15)A.Introduction (15)A100General (15)A200Aim of the design (15)B.General Design Considerations (15)B100General (15)B200Overall design (15)B300Details design (15)C.Design Conditions (15)C100Basic conditions (15)D.Loading Conditions (16)D100General (16)D200Load (16)E.Design by the WSD Method (16)E100Permissible stress and usage factors (16)E200Basic usage factors (16)F.Design Assisted by Testing (16)F100General (16)F200Full-scale testing and observation of performance of existing structures (16)Sec. 3Loads and Load Effects (17)A.Introduction (17)A100General (17)B.Basis for Selection of Loads (17)B100General (17)C.Permanent Functional Loads (17)C100General (17)D.Variable Functional Loads (18)D100General (18)D200Variable functional loads on deck areas (18)D300Tank pressures (18)D400Lifeboat platforms (19)E.Environmental Loads (19)E100General (19)E200Environmental conditions for mobile units (19)E300Environmental conditionss for site specific units (19)E400Determination of hydrodynamic loads (19)E500Wave loads (19)E600Wave induced inertia forces (20)E700Current (20)E800Wind loads (20)E900Vortex induced oscillations (20)E1000Water level and tidal effects (20)E1100Marine growth (20)E1200Snow and ice accumulation............................................20E1300Direct ice load.. (20)E1400Earthquake (20)bination of Environmental Loads (21)F100General (21)G.Accidental Loads (21)G100General (21)H.Deformation Loads (21)H100General (21)H200Temperature loads (21)H300Settlements and subsidence of sea bed (21)I.Fatigue loads (22)I100General (22)J.Load Effect Analysis (22)J100General (22)J200Global motion analysis (22)J300Load effects in structures and soil or foundation (22)Sec. 4Structural Categorisation, Material Selection and Inspection Principles (23)A.General (23)A100 (23)B.Temperatures for Selection of Material (23)B100General (23)B200Floating units (23)B300Bottom fixed units (23)C.Structural Category (23)C100General (23)C200Selection of structural category (23)C300Inspection of welds (24)D.Structural Steel (24)D100General (24)D200Material designations (24)D300Selection of structural steel (25)D400Fracture mechanics (FM) testing (25)D500Post weld heat treatment (PWHT) (25)Sec. 5Structural Strength (26)A.General (26)A100General (26)A200Structural analysis (26)A300Ductility (26)A400Yield check (26)A500Buckling check (27)B.Flat Plated Structures and Stiffened Panels (27)B100Yield check (27)B200Buckling check (27)B300Capacity checks according to other codes (27)C.Shell Structures (27)C100General (27)D.Tubular Members, Tubular Joints and Conical Transitions.27 D100General (27)E.Non-Tubular Beams, Columns and Frames (28)E100General (28)Sec. 6Section Scantlings (29)A.General (29)A100Scope (29)B.Strength of Plating and Stiffeners (29)B100Scope (29)B200Minimum thickness (29)B300Bending of plating (29)D ET N ORSKE V ERITASOffshore Standard DNV-OS-C201, April 2005Amended April 2006, Page 6 – Contents see note on front coverB400Stiffeners (29)C.Bending and Shear in Girders (30)C100General (30)C200Minimum thickness (30)C300Bending and shear (30)C400Effective flange (30)C500Effective web (30)C600Strength requirements for simple girders (30)C700Complex girder systems (31)Sec. 7Fatigue (32)A.General (32)A100General (32)A200Design fatigue factors (32)A300Methods for fatigue analysis (32)A400Simplified fatigue analysis (33)A500Stochastic fatigue analysis (33)Sec. 8Accidental Conditions (34)A.General (34)A100General (34)B.Design Criteria (34)B100General (34)B200Collision (34)B300Dropped objects (34)B400Fires (34)B500Explosions (34)B600Unintended flooding (34)Sec. 9Weld Connections (36)A.General (36)A100Scope (36)B.Types of Welded Steel Joints (36)B100Butt joints (36)B200Tee or cross joints (36)B300Slot welds (37)B400Lap joint (37)C.Weld Size (37)C100General (37)C200Fillet welds (37)C300Partly penetration welds and fillet welds in crossconnections subject to high stresses (38)C400Connections of stiffeners to girders and bulkheads, etc..38 C500End connections of girders (39)C600Direct calculation of weld connections (39)Sec. 10Corrosion Control (40)A.General (40)A100Scope (40)B.Techniques for Corrosion Control Related to EnvironmentalZones (40)B100Atmospheric zone (40)B200Splash zone (40)B300Submerged zone (40)B400Internal zone (40)C.Cathodic Protection (41)C100General (41)C200Galvanic anode systems (41)C300Impressed current systems (42)D.Coating Systems (42)D100Specification of coating (42)Sec. 11Special Considerations for Column Stabilised Units (43)A.General (43)A100Assumptions and application (43)B.Structural Categorisation, Material Selection and InspectionPrinciples (43)B100General (43)B200Structural categorisation (43)B300Material selection (43)B400Inspection categories (44)C.Design and Loading Conditions (46)C100General (46)C200Permanent loads (46)C300Variable functional loads (46)C400Tank loads (46)C500Environmental loads, general (46)C600Sea pressures (47)C700Wind loads (47)C800Heavy components (47)C900Combination of loads (47)D.Structural Strength (47)D100General (47)D200Global capacity (47)D300Transit condition (47)D400Method of analysis (48)D500Air gap (48)E.Fatigue (48)E100General (48)E200Fatigue analysis (49)F.Accidental Conditions (49)F100General (49)F200Collision (49)F300Dropped objects (49)F400Fire (49)F500Explosion (49)F600Heeled condition (49)G.Redundancy (49)G100General (49)G200Brace arrangements (49)H.Structure in Way of a Fixed Mooring System (49)H100Structural strength (49)I.Structural Details (50)I100General (50)Sec. 12Special Considerations forSelf-Elevating Units (51)A.Introduction (51)A100Scope and application (51)B.Structural Categorisation, Material Selection and InspectionPrinciples (51)B100General (51)B200Structural categorisation (51)B300Material selection (51)B400Inspection categories (51)C.Design and Loading Conditions (51)C100General (51)C200Transit (52)C300Installation and retrieval (52)C400Operation and survival (52)D.Environmental Conditions (53)D100General (53)D200Wind (53)D300Waves (53)D400Current (53)D500Snow and ice (53)E.Method of Analysis (53)E100General (53)E200Global structural models (54)E300Local structural models (54)E400Fatigue analysis (55)F.Design Loads (55)F100General (55)F200Permanent loads (55)D ET N ORSKE V ERITASAmended April 2006,Offshore Standard DNV-OS-C201, April 2005 see note on front cover Contents – Page 7F300Variable functional loads (55)F400Tank loads (55)F500Environmental loads, general (55)F600Wind loads (55)F700Waves (56)F800Current (56)F900Wave and current (56)F1000Sea pressures during transit (57)F1100Heavy components during transit (57)F1200Combination of loads (57)G.Structural Strength (57)G100General (57)G200Global capacity (57)G300Footing strength (57)G400Leg strength (58)G500Jackhouse support strength (58)G600Hull strength (58)H.Fatigue Strength (58)H100General (58)H200Fatigue analysis (58)I.Accidental Conditions (58)I100General (58)I200Collisions (58)I300Dropped objects (58)I400Fires (58)I500Explosions (58)I600Unintended flooding (58)J.Miscellaneous requirements (59)J100General (59)J200Pre-load capasity (59)J300Overturning stability (59)J400Air gap (59)Sec. 13Special Considerations forTension Leg Platforms (TLP) (61)A.General (61)A100Scope and application (61)A200Description of tendon system (61)B.Structural Categorisation, Material Selection and InspectionPrinciples (62)B100General (62)B200Structural categorisation (62)B300Material selection (63)B400Design temperatures (63)B500Inspection categories (63)C.Design Principles (63)C100General (63)C200Design conditions (64)C300Fabrication (64)C400Hull and Deck Mating (64)C500Sea transportation (64)C600Installation (64)C700Decommissioning (64)C800Design principles, tendons (64)D.Design Loads (65)D100General (65)D200Load categories (65)E.Global Performance (65)E100General (65)E200Frequency domain analysis (66)E300High frequency analyses (66)E400Wave frequency analyses (66)E500Low frequency analyses (66)E600Time domain analyses (66)E700Model testing (67)E800Load effects in the tendons (67)F.Structural Strength (67)F100General (67)F200Hull (68)F300Structural analysis (68)F400Structural design.............................................................68F500Deck.. (68)F600Extreme tendon tensions (69)F700Structural design of tendons (69)F800Foundations (69)G.Fatigue (69)G100General (69)G200Hull and deck (69)G300Tendons (69)G400Foundation (70)H.Accidental Condition (70)H100Hull (70)H200Hull and deck (71)H300Tendons (71)H400Foundations (71)Sec. 14Special Considerations for Deep DraughtFloaters (DDF) (72)A.General (72)A100Introduction (72)A200Scope and application (72)B.Non-Operational Phases (72)B100General (72)B200Fabrication (72)B300Mating (72)B400Sea transportation (72)B500Installation (72)B600Decommissioning (73)C.Structural Categorisation, Selection of Material andExtent of Inspection (73)C100General (73)C200Material selection (73)C300Design temperatures (73)C400Inspection categories (73)C500Guidance to minimum requirements (73)D.Design Loads (74)D100Permanent loads (74)D200Variable functional loads (74)D300Environmental loads (74)D400Determination of loads (74)D500Hydrodynamic loads (74)E.Deformation Loads (74)E100General (74)F.Accidental Loads (75)F100General (75)G.Fatigue Loads (75)G100General (75)bination of Loads (75)H100General (75)I.Load Effect Analysis in Operational Phase (75)I100General (75)I200Global bending effects (75)J.Load Effect Analysis in Non-Operational Phases (75)J100General (75)J200Transportation (76)J300Launching (76)J400Upending (76)J500Deck mating (76)J600Riser installations (76)K.Structural Strength (76)K100Operation phase for hull (76)K200Non-operational phases for hull (76)K300Operation phase for deck or topside (77)K400Non-operational phases for deck or topside (77)L.Fatigue (77)L100General (77)L200Operation phase for hull (77)L300Non-operational phases for hull (77)D ET N ORSKE V ERITASOffshore Standard DNV-OS-C201, April 2005Amended April 2006, Page 8 – Contents see note on front coverL400Splash zone (77)L500Operation phase for deck or topside (78)L600Non-operational phases for deck or topside (78)M.Accidental Condition (78)M100General (78)M200Fire (78)M300Explosion (78)M400Collision (78)M500Dropped objects (78)M600Unintended flooding (78)M700Abnormal wave events (78)App. A Cross Sectional Types (80)A.Cross Sectional Types (80)A100General (80)A200Cross section requirements for plastic analysis (80)A300Cross section requirements whenelastic global analysis is used (80)App. B Methods and Models for Design of Column-Stabilised Units (82)A.Methods and Models (82)A100General (82)A200World wide operation (82)A300Benign waters or restricted areas (82)App. C Permanently Installed Units (83)A.Introduction (83)A100Application (83)B.Inspection and Maintenance (83)B100Facilities for inspection on location................................83C.Fatigue. (83)C100Design fatigue factors (83)C200Splash zone for floating units (83)App. D Certification of Tendon System (84)A.General (84)A100Introduction (84)B.Equipment categorization (84)B100General (84)C.Fabrication Record (84)C100General (84)D.Documentation Deliverables for Certification ofEquipment (85)D100General (85)E.Tendon Systems and Components (85)E100General (85)E200Tendon pipe (85)E300Bottom tendon interface (BTI) (86)E400Flex bearings (86)E500Foundations (86)E600Top tendon interface (TTI) (86)E700Intermediate tendon connectors (ITC) (86)E800Tendon tension monitoring system (TTMS) (86)E900Tendon porch (87)E1000Tendon corrosion protection system (87)E1100Load management program (LMP) (87)F.Categorisation of Tendon Components (87)F100General (87)G.Tendon Fabrication (88)G100General (88)D ET N ORSKE V ERITASAmended April 2006,Offshore Standard DNV-OS-C201, April 2005 see note on front cover Sec.1 – Page 9SECTION 1INTRODUCTIONA. GeneralA 100Introduction101 This offshore standard provides principles, technical re-quirements and guidance for the structural design of offshore structures, based on the Working Stress Design (WSD) meth-od.102 This standard has been written for general world-wide application. Statutory regulations may include requirements in excess of the provisions by this standard depending on size, type, location and intended service of the offshore unit or in-stallation.103 The standard is organised with general sections contain-ing common requirements and sections containing specific re-quirement for different type of offshore units. In case of deviating requirements between general sections and the ob-ject specific sections, requirements of the object specific sec-tions shall apply.A 200Objectives201 The objectives of this standard are to:—provide an internationally acceptable level of safety by de-fining minimum requirements for structures and structural components (in combination with referred standards, rec-ommended practices, guidelines, etc.)—serve as a contractual reference document between suppli-ers and purchasers—serve as a guideline for designers, suppliers, purchasers and regulators—specify procedures and requirements for offshore struc-tures subject to DNV certification and classification.A 300Scope and application301 This standard is applicable to the following types of off-shore structures:—column-stabilised units—self-elevating units—tension leg platforms—deep draught floaters.302 For utilisation of other materials, the general design principles given in this standard may be used together with rel-evant standards, codes or specifications covering the require-ments to materials design and fabrication.303 The standard is applicable to structural design of com-plete units including substructures, topside structures and ves-sel hulls.304 This standard gives requirements for the following: —design principles—structural categorisation—material selection and inspection principles—loads and load effect analyses—design of steel structures and connections—special considerations for different types of units. Requirements for foundation design are given in DNV-OS-C101.A 400Other than DNV codes401 Other recognised codes or standards may be applied pro-vided it is shown that the codes and standards, and their appli-cation, meet or exceed the level of safety of the actual DNV standard.402 In case of conflict between requirements of this standard and a reference document other than DNV documents, the re-quirements of this standard shall prevail.403 Where reference is made to codes other than DNV doc-uments, the latest revision of the documents shall be applied, unless otherwise specified.404 When code checks are performed according to other than DNV codes, the usage factors as given in the respective code shall be used.A 500Classification501 Classification principles, procedures and applicable class notations related to classification services of offshore units are specified in the DNV Offshore Service Specifications given in Table A1.502 Documentation requirements for classification are given by DNV-RP-A202.B. ReferencesB 100General101 The DNV documents in Table B1 are referred to in the present standards and contain acceptable methods for fulfilling the requirements in this standard.102 The latest valid revision of the DNV reference docu-ments in Table B2 applies. See also current DNV List of Pub-lications.103 The documents listed in Table B2 are referred in the present standard. The documents include acceptable methods for fulfilling the requirements in the present standard and may be used as a source of supplementary information. Only the referenced parts of the documents apply for fulfilment of the present standard.Table A1 DNV Offshore Service SpecificationsReference TitleDNV-OSS-101Rules for Classification of Offshore Drilling andSupport UnitsDNV-OSS-102Rules for Classification of Floating Productionand Storage UnitsDNV-OSS-103Rules for Classification of LNG/LPG FloatingProduction and Storage Units or Installations DNV-OSS-121Classification Based on Performance CriteriaDetermined by Risk Assessment MethodologyRules for Planning and Execution of MarineOperationsTable B1 DNV Reference DocumentsReference TitleDNV-OS-A101Safety Principles andArrangementDNV-OS-B101Metallic MaterialsDNV-OS-C101Design of Offshore Steel Struc-tures, General (LRFD method) DNV-OS-C301Stability and Watertight Integrity DNV-OS-C401Fabrication and Testing ofOffshore StructuresD ET N ORSKE V ERITASOffshore Standard DNV-OS-C201, April 2005Amended April 2006, Page 10 – Sec.1see note on front coverC. DefinitionsC 100Verbal forms101 Shall: Indicates a mandatory requirement to be followed for fulfilment or compliance with the present standard. Devia-tions are not permitted unless formally and rigorously justified, and accepted by all relevant contracting parties.102 Should: Indicates a recommendation that a certain course of action is preferred or particularly suitable. Alterna-tive courses of action are allowable under the standard where agreed between contracting parties but shall be justified and documented.103 May: Indicates a permission, or an option, which is per-mitted as part of conformance with the standard.C 200Terms201 Accidental condition: When the unit is subjected to ac-cidental loads such as collision, dropped objects, fire explo-sion, etc.202 Accidental loads: Loads which may occur as a result of accident or exceptional events, e.g. collisions, explosions, dropped objects.203 Atmospheric zone: The external surfaces of the unit above the splash zone.204 Cathodic protection: A technique to prevent corrosion of a steel surface by making the surface to be the cathode of an electrochemical cell.205 Characteristic load: The reference value of a load to be used in the determination of load effects. The characteristic load is normally based upon a defined fractile in the upper end of the distribution function for load.206 Characteristic strength: The reference value of structur-al strength to be used in the determination of the design strength. The characteristic strength is normally based upon a 5% fractile in the lower end of the distribution function for re-sistance.207 Characteristic value: The representative value associat-ed with a prescribed probability of not being unfavourably ex-ceeded during the applicable reference period.208 Classic spar: Shell type hull structure.209 Classification Note: The Classification Notes cover proven technology and solutions which is found to represent good practice by DNV, and which represent one alternative for satisfying the requirements given in the DNV Rules or other codes and standards cited by DNV. The Classification Notes will in the same manner be applicable for fulfilling the require-ments in the DNV Offshore Standards.210 Coating: Metallic, inorganic or organic material applied to steel surfaces for prevention of corrosion.211 Column-stabilised unit: A floating unit that can be relo-cated. A column-stabilised unit normally consists of a deck structure with a number of widely spaced, large diameter, sup-porting columns that are attached to submerged pontoons. 212 Corrosion allowance: Extra wall thickness added during design to compensate for any anticipated reduction in thick-ness during the operation.213 Damaged condition: The unit condition after accidental damage.214 Deep draught floater (DDF): A floating unit categorised with a relative large draught. The large draught is mainly intro-duced to obtain reduced wave excitation in heave and suffi-ciently high eigenperiod in heave such that resonant responses in heave can be omitted or minimised.215 Design brief: An agreed document presenting owner's technical basis, requirements and references for the unit design and fabrication.216 Design temperature: The design temperature for a unit is the reference temperature for assessing areas where the unit can be transported, installed and operated. The design temper-ature is to be lower or equal to the lowest mean daily tempera-ture in air for the relevant areas. For seasonal restricted operations the lowest mean daily temperature in air for the sea-son may be applied.217 Driving voltage: The difference between closed circuit anode potential and the protection potential.218 Dry transit: A transit where the unit is transported on a heavy lift unit from one geographical location to another. 219 Dynamic upending: A process where seawater is filled or flooded into the bottom section of a horizontally floating DDF hull and creating a trim condition and subsequent water filling of hull or moonpool and dynamic upending to bring the hull in vertical position.220 Environmental loads: Loads directly and indirectly due to environmental phenomena. Environmental loads are not a necessary consequence of the structures existence, use and treatments. All external loads which are responses to environ-mental phenomena are to be regarded as environmental loads, e.g. support reactions, mooring forces, and inertia forces. 221 Expected loads and response history: Expected load and response history for a specified time period, taking into ac-count the number of load cycles and the resulting load levels and response for each cycle.222 Expected value: The most probable value of a load dur-ing a specified time period.223 Fail to safe: A failure shall not lead to new failure, which may lead to total loss of the structure.DNV-OS-D101Marine Machinery Systems andEquipmentDNV-OS-E301Position MooringDNV-OS-F201Dynamic RisersDNV-RP-C103Column Stabilised UnitsDNV-RP-C201Buckling Strength of PlatedStructuresDNV-RP-C202Buckling Strength of Shells DNV-RP-C203Fatigue Strength Analysis ofOffshore Steel Structures Classification Note 30.1Buckling Strength Analysis ofBars and Frames, and SphericalShellsClassification Note 30.4 FoundationsClassification Note 30.5 Environmental Conditions andEnvironmental Loads Classification Note 31.5Strength Analysis of MainStructures of Self-elevating Units Table B2 Other referencesReference TitleAISC-ASD Manual of Steel Construction ASDAPI RP 2A – WSD with supplement 1Planning, Designing and Constructing Fixed Offshore Platforms – Working Stress DesignAPI RP 2T Planning, Designing and Constructing TensionLeg PlatformsBS 7910Guide on methods for assessing the acceptability offlaws in fusion welded structuresNACE TPC Publication No. 3. The role of bacteria in corrosionof oil field equipmentSNAME 5-5A Site Specific Assessment of Mobile Jack-Up UnitsD ET N ORSKE V ERITAS。
人工智能英文课件

Unsupervised learning
Key components of unsupervised learning include the input data and a learning algorithm that iteratively updates its parameters to discover patterns or groups within the unlabeled data
03
Natural language processing
Speech recognition
• Speech recognition is the process of converting audio signals of human speech into machine ready formats This technology allows computers to understand and interpret human voice commands, enabling voice activated commands and guidance
02
Machine learning
Supervised learning
• Supervised learning is a type of machine learning where the algorithm is provided with labeled training data The goal is to learn a function that maps input data to desired outputs based on the provided labels Common examples include classification and regression tasks
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
A networked engineering portal to support distributedsupply chain partnershipD.LIU*,C.ROBERTO BOER,M.SACCO and R.FORNASIERO Institute of Industrial Technologies and Automation,National Research Council,Via Bassini 15,Milan,ItalyIn this paper,the authors discuss the latest advancement of supply chain management (SCM)that leads to the development of a networked supply chain partnership (SCP).A deep insight is given into the nature,motivation and implementation of the SCP as a value-added component in the forefront of SCM.The role of the Internet in SCP is examined,and the current situation of SCP in China is pared with available e-portals in the global market,a web-based DRAGON Engineering Portal (DEP)across geographical borders and cultural barriers is proposed to support European and Chinese industrial partners in developing strategic manufacturer–supplier partner-ships.E-partnering and cultural repository are in-built to support a dislocated supply chain partnership for collaborative product development,starting with the location of partners and the implementation of contact initiation.Keywords :Supply chain management;Networked supply chain partnership;Web-based engineering portal;E-partnering;Contact initiation;Collaborative product development1.IntroductionAs the economy changes and competition becomes more global,it is no longer company pany,but supply chain versus supply chain (Stanley 2001).In the new millennium,many challenges have appeared in global supply chain management (SCM),and there has been tremendous pressure to innovate within SCM research in order to meet worldwide demand.Over the past decades,much literature has been dedicated to SCM discussing cost reduction,profit making and business growth,the Internet in SCM activities such as production scheduling,order processing,purchasing,transportation,customer service,and so on.However,little attention has been paid to the Internet-based supply chain partnership (SCP).Although the joint value through networking and customer–supplier partnering is more or less envisioned by many manufacturing companies,what is less understood (Mo ller 2002)is the more complex partnering targeted at generating innovative products.Strategic partnering in order to develop new products (Murray 1996)is another complicated issue beyond these various strategic alliances:mergers,acquisitions,joint ventures and consortia.However,partnering has been suggested as the best solution for making the most of supplier relationships (Gadde 2000),because suppliers represent the most important assets of a company and should therefore be treated as a type of investment,beyond delivering reasonably priced items on request.In today’s manufacturing,the competitive advantage (Lewis 1995)no longer resides with a company’s own innate capabilities,but rather with the relationships and links the firm can forge with external organizations.It is not hard to discover that many manufacturing companies within a supply chain have stipulated their cooperation strategies with existing partners,but the same companies lack efficient methods or tools to help find new relevant suppliers in a worldwide context in order to build an extended supply chain for collaborative product development.DRAGON (development of an interactive engineering portal for open networks)(Grabowski et al .2001a,2001b,2002)is an ongoing EU–China project (2001–2004)under a strong project consortium consisting of eight European and*Corresponding author.Email:d.liu@r.itInternational Journal of Computer Integrated Manufacturing ,Vol.19,No.2,March 2006,91–103International Journal of Computer Integrated ManufacturingISSN 0951-192X print/ISSN 1362-3052online ª2006Taylor &Francis/journals DOI:10.1080/09511920500090354four Chinese research and industrial partners.It aims to provide a DRAGON engineering portal(DEP)to inter-nationalize and computerize the processes offinding new relevant suppliers,establishing strategic supplier partnering and integrating approved new suppliers into the collabora-tive product development.The engineering portal is innovatively to support the collaboration between dislo-cated partners who have common engineering tasks.DEP represents a virtual,process-and data-oriented integration platform accessible to the companies involved with hetero-geneous information technology(IT)infrastructures.This paper willfirst review the recent developments within SCM.To establish a distributed supply chain partnership has been found to be one of the value-added research themes.DRAGON is presented to address the vital importance of a networked supply chain partnership within an existing supply chain and along an extended supply chain at the global level.The full purpose of DRAGON is not only targeting the Chinese market but also attempting to provide a general template for best practice throughout the world.By thoroughly examining a number of existing e-Portals in the global market,the innovative architecture of DEP is proposed and the main functionality of the engineering portal is constructed in order to establish a collaborative partnership along the supply chain.The whole process of SCP is started with the contact initiation,which involves the location of potential partners,pre-selection and eval-uation of candidate partners,negotiation of supplier partnership and strategic collaboration,in addition to new product development.Particularly,DEP incorporates a culture-specific support to smooth inter-communication, with an individual request function provided for company-oriented solutions,and highlighting the huge potential Chinese supplier market.2.Developments in SCMSCM is becoming an important management discipline in the current world economy.Considered to be the last frontier of cost reduction in1965(Richard2000),SCM is now positioned at the forefront of business planning to enable reliability in delivering innovative,high-quality, low-cost products on time.SCM is the collaborative effort of multiple channel members to design,implement and manage seamless value-added processes to meet the real needs of the end customer (Stanley2001).Today’s companies that learn how to improve the management level of their supply chain will to a large degree become the new success stories of the global marketplace.To identify the failures and weaknesses in the existing supply chain process and performance should be thefirst step,while mastering new challenges and emerging opportunities in the area of SCM(Boe r et al.1999,Richard2000,Keah2001,Liao2001,Stanley2001, Fornasiero et al.2002,Paul2003)is of critical importance:1.accurate forecasts of supply chain requirements;2.optimal supply chain design;3.agility over the supply chain;4.supply chain performance measurement;5.customer-focused corporate vision;work support in SCM activities;7.integration of SCM into new product development;8.strategic supply chain partnership.Until now,the supply chain operations reference(SCOR) model(SCC2003)has been developed and endorsed by the Supply Chain Council(USA-SCC2003)to standardize descriptions of management processes and metrics in order to measure the operational performance,features and functionalities of software solutions.SCOR is structured byfive distinct management processes:Plan!Source! Make!Deliver!Return,which span all supplier–customer interactions,all physical material transactions and all market interactions.However,SCOR does not include(USA-SCC2003)technology development pro-cesses or product and process design and their development processes.This implies that research efforts on integrating SCM into new product development and developing strategic supply chain partnership lack the corresponding SCOR support.It is worth noting that,SCM at the stage of product design and development is always ignored,although the design value is very high in the lifecycle of a new product (Liao2001).The following paragraphs summarize the major changes over the past decades as SCM has evolved towards a strategic SCP for new product development. Prior to the1970s,mass production with little product and processflexibility was considered the primary opera-tion strategy.New product development was,however, very slow because most manufactures relied exclusively on in-house technology and capacity(Keah2001)and regarded it as too risky to share technology and expertise with customers or suppliers.In the1980s,intense global competition alerted manufacturers to the need to improve SCM by turning the simple,reliable buyer–supplier rela-tionship into a kind of strategic and collaborative buyer–supplier partnership.Since the1990s,integrating enterprise resources along the value chain has become a focus not only for logistic problems but also for strategic suppliers. Manufacturers commonly exploit supplier strengths and technology in support of new product development. Professor Hau Lee(2000),the director of Stanford Global Supply Chain Forum,pointed out that effective SCM should start with the optimal design of the products and processes in the era of the Internet.The early involvement of suitable suppliers at the stage of product92 D.Liu et al.design and development will undoubtedly lead to innova-tions in design choices and development processes by sharing advanced design and development technologies. With more and more enterprises extending their boundaries to form network allies,integration of SCM into new product development is becoming a reality.3.Supply chain partnershipAmong the possible obstacles that can cause a supply chain to fail,the authors have noticed that relatively high instability,a comparatively large number of chains on the customer side and the absence of market power play an important part.Moreover,it is important to shed light on the following problematic aspects:1.the lack of mutual trust and true cooperation;2.the lack of awareness of the relationship betweeninternal and external chains and physical andinformational chains;3.the heterogeneous technology used for communica-tion.Most available supply chain literature in recent decades focuses on the logistic aspects of supply chain and on the maximization of customer satisfaction.The intangible benefits from building constructive supplier relations and from improving current,less than satisfying supplier relations to reap a joint effort are much less mentioned. Although,many American and Europeanfirms began to be aware of the advantages of sharing technology and information with other companies and thus reducing uncertainty and risks,many manufacturing companies that work in partnership with their customers and suppliers still care mainly about the performance of existing partners,but overlook the significant importance of developing colla-borative and strategic SCP to improve the whole efficiency of their supply chain.Maloni(1997)stated that the supply chain for many successfulfirms has matured from an adversarial relation-ship to one of supply chain partnerships.Especially for small and medium size enterprises(SMEs),there is a need to formulate strategic aims and develop a sort of strategic alliance,namely,a supply chain partnership that is a relationship formed among independent entities in supply channels to achieve specific objectives and benefits as well as to share possible risks.The genuine motive of SCP should be to secure long-term benefits based on bilateral trust,openness and communication(DigitalTrading 2003).It is distinguished by activities such as negotiating levers that are not only price or delivery or quality,sharing production forecasts,developing joint marketing and product strategies,exchanging stafffor training pro-grammes,harmonizing IT and so on.With the current push toward external integration with both suppliers and customers,and with the advanced IT to strengthen competitive advantages,today’s manufacturers are looking for new reliable suppliers to work cooperatively on providing improved service,technological innovation, new product development,mutual planning and problem-solving efforts.3.1.A survey of SCP in ChinaAt present,industrial companies are pursuing an agile manufacturing pattern that addresses the provision of a higher quality product to respond to the market within the shortest time and at a lower cost but with the customer needs well met.From this point of view,dislocated product development and manufacturing in a country where it has a local market is of vital importance.To have local partners enables a better sense of how to develop products for the local market,to make better use of local resources and to achieve a better communication with local customers and suppliers.On the other hand,developing countries like China really need to import advanced product design technologies and modern SCM patterns from developed western countries.The mutual demands are calling for a reliable and effective strategic alliance which enables a true win–win supply chain partnership.Recent literature reveals that Chinese manufacturing companies communicate more with customers than suppli-ers,that is the downstream relationships between com-panies and their customers are closer than the upstream relationships between companies and their suppliers.In China,the relationship with customers is significantly correlated with the index of company performance(David 2000),while consulting suppliers about new product devel-opment is associated with poor performance and partial complication in supply chain management.Although SCP might be considered less valuable to a company when there is little new product development or the new product does not rely on a particular supplier,it should be realized that global manufacturing competition stresses the shortest delivery time and the best delivery performance that could hardly be achieved without full use of global resources and a timely share of product develop-ment technologies.This is extremely valuable for China whose economy has been booming with joint ventures. Anthony Anderson(2003),the executive director on the directorate board of Olimex Limited(an international top-class cookware company)expressed his genuine motive to cooperate with China,‘what we are seeking is not only a supplier but a long-term partner.Our goal is to realize sustainable collaboration and development.This kind of collaborative partnership is of course much closer than the common sense of buyer–supplier relationship because we invested in Chinese factory’.A networked engineering portal93With the purpose of helping industrial partners establish global supply chain partnerships,DRAGON is on the way to bridging Europe and China,but not only China,by supporting business partners in establishing strategic and multi-cultural SCP.Since Chinese industrial partners are involved in the project for improving portal services, offering validation cases and promoting the dissemination offinal research results,DRAGON enables the portal to be in a real sense a cross-cultural paradigm for dislocated engineering collaboration between European and Chinese industrial partners.3.2.SCP implementationIn general,the fundamental steps to implement the supply chain partnership consist of:1.investigating strategic needs for partnership;2.developing partner criteria;3.hunting for potential suppliers;4.pre-selecting and evaluating candidate suppliers;5.establishing the formal partnership;6.maintaining,refining or dissolving the partner-ship.The entire process implies many elements critical to the success of the SCP.Two rudiments(Maloni1997)that must be done well in supplier partnering are initial strategic analyses and the selection of proper suppliers.In the initial phase of strategic analyses,some barriers which will make a lot of sense might include both social/ cultural/attitudinal and procedural/structural factors.In addition,a series of selection criteria should be taken into account to evaluate potential supply chain partners,such as strategic planning,financial stability,technology capability, profit benefits,management philosophy,cultural compat-ibility and so on.Intense interaction and the necessary documentation should normally be a‘must’in this phase of partnership establishment.The maintenance phase cannot be over-looked because it concerns a variety of important elements such as mutual trust,reciprocal collaboration goodwill, management skills,performance measurements and the like.Considering the possible difficulty in achieving a successful SCP,the dissolution of the supply chain partnership may be necessary if selected companies are unable to pass through the critical steps of partnering or accomplish the synergies during the cooperation.3.3.The role of the Internet in SCPSupply chains are at the initial stages of a startling reinvention triggered by the rise of the Internet(David 2000).The Internet provides supply chain activities with valuable opportunities for cost reduction and service improvements(Richard2000),for example,creating on-line vendor catalogues,tracking trades and goods trans-portation,dealing with customer queries or complaints and technical issues,processing orders,providing around-the-clock customer service,communicating and negotiating with suppliers.The Internet has been considerably exploited in managing supply chain operations,and will dramatically increase the profitability of industrial companies.As the Internet changes the way in which supply chains work,the information,decisions and processes that form supply chain management are moving to the web across inter-company boundaries(David2000).Since the web is capable of supporting information sharing,joint decision-making and effective coordination between business partners,the establishment of strategic alliance among distributed supply chain partners becomes possible.As the ultimate goal of supply chain partnership is to promote new product development through Internet-enabled collabora-tion,a web-based corporate portal like DEP is needed to work as a technical platform for dislocated business partners to establish strategic SCP and then carry out the collaborative product development.4.Web-based corporate portalThe term‘web portal’was adopted to refer to a search engine,the main goal of which was to facilitate access to information contained in documents spread throughout the Internet(Dias2001).More recently,with the evolution of the information age,the web-based corporate portal(WCP) has been studied as a tool that implements the whole information collecting process,reading and retrieving through Boolean search,categorized navigation,persona-lization and integration of additional features providing direct access to other specialized information and commer-cial worlds(Reynolds1999).WCP has several different terms such as‘corporate information portal’,‘business portal’and‘enterprise information portal’,which are used interchangeably as synonyms(Reynolds1999,Dias2001). Generally speaking,the main functionality of a WCP falls into two categories:decision processing and colla-borative processing.The former helps enterprise executives, managers and analysts access the necessary information for making business-oriented decisions.The latter assists in organizing,refining,classifying and sharing work-group information.Now that the web offers the‘e-Age’with considerable potential for streamlined coordination between business partners,WCP is no longer a simple gateway to acquire information,but should‘connect us not only with everything we need,but with everyone we need,and provide all the tools we need to work together’(Murray 1999).As has been said,a WCP must not only provide information,knowledge and expertise,but fully integrate94 D.Liu et al.collaborative partners to fulfill their common engineering activities beyond a simple entry to content searching or decision support.A corporate portal should also guarantee that the right information is available or dispatched to the right person at the right time regardless of where it resides.Apart from its strong pull–push capacity of dealing with information,the WCP should also be furnished with an easy-to-use web interface to enable its wide,rapid and correct access to heterogeneous systems,distributedfiles and databases. 5.DRAGON engineering portalAs mentioned previously,DRAGON is the abbreviation of the EU–China project(development of an interactive engineering portal for open networks).The project aims at building a DRAGON engineering portal to support inno-vatively a joint virtual collaboration for product development between distributed business partners from European countries and China.Both manufactures and suppliers are enabled to provide,view,and process information via the DEP.In order to protect vital know-how of collabor-ating partners,the permissible information exchange is limited to the common product development processes. DRAGON provides new technical solutions for distrib-uted engineering collaboration based on a set of web-based tools and services,as illustrated infigure1:1.check of collaboration(CC)enables end users tosearch,evaluate and rank potential partners withoriginal equipment manufacturers’(OEMs’)cut-offrequests met as efficiently as possible.2.request and navigation(RN)supports end users inthe early stage(contact initiation)of engineeringcollaboration for enterprise registration,manage-ment of user–product–project,partner selectionand contact initiation.3.process modeller(PM)helps the companies involvedto define common product development processesthrough a built-time functionality of workflowmanagement.4.specification modeller(SM)manages a complete andcorrect specification of a common engineering taskon a necessary and sufficient subset of productrequirements as well as the design validation in linewith these requirements.5.visualization and validation(VV),allows the com-panies involved to access,visualize and validaterelated engineering data via standardized interfaces. The kernel infrastructure of DEP is the DRAGON information broker(DIB),which is an intermediate connector interacting with all the above-mentioned services for manipulating the data model and instance data through its internal data engine.It also provides an external data engine for the engineering and administrative data ex-change between the major service units and external application systems,such as product data management (PDM),enterprise resource planning(ERP),computer aided exercise(CAx)and soon.Figure1.The architecture of the DRAGON engineering portal.A networked engineering portal95Cultural repository(CR)is the underpinning of the DEP. It mainly consists of three components:‘search andfind’; knowledge management;and culture guidelines.‘Search andfind’provides end users with general information about the targeted country;knowledge management allows end users to share personal experience and best practices; culture guidelines gives culture-related advice on every step of two stages of engineering collaboration.With the help of cultural repository throughout the entire process of engineering collaboration,DEP is able to: 1.support industrial companies in locating appro-priate collaborating partners in foreign markets,then initiate a contract and establish engineeringcollaboration;2.facilitate a distributed,requirement-driven productdevelopment under a unified data model;3.support a dynamic integration of developmentprocesses based on consistent information models;4.ensure a secure exchange of information and knowl-edge among involved companies;5.identify and solve cooperative problems arisen fromcultural differences;6.provide best practices for web-based commonengineering collaboration.Envisioning the key benefits andfinancial gains from the DRAGON project,DEP will be promoted across Europe via best practice activities to validate the research results by both project partners and interested external companies.5.1.E-portal case study towards the DEPE-collaboration(Dias2001)among supply chain partners involves sharing of information,collaboration planning, joint decision-making,new product development,and product change management.E-collaboration enables business partners to co-work in:1.supply chain activities across enterprises and overthe Internet;2.collaborative decision-making for synchronizingand developing new plans to meet the marketdemand;3.collaborative product development by organisingauthorized project team to review product innova-tion and to share design&manufacturingtechnologies;4.correlated product change management along thesupply chain by delivering any engineering changeinvolved in a product development.As e-portals emerge as a method to integrate more necessary functions to provide a better service to enable manufacturing companies to collaborate,they make it possible to enlarge the scope of the e-supply chain into a broader scale of collaboration by supplementing a strong e-partnering function and a collaborative product develop-ment function,despite the fact that they exist in a variety of different forms(Dias2001,Chan2002).In order to devise an advanced,innovative system architecture for DEP,more than ten selected e-portals, including a few emerging Chinese portals,have been carefully pared with DEP,table1cate-gorizes the e-portals involved according to four significant indicators:contact initiation(CI),supply chain partnership (SCP),collaborative product development(CPD),and culture-specific solution(CS).A number of competitive solutions can be found in the market,as shown in table1.DEP is,however,the only one that covers the full bandwidth of a collaborative process (Bumeder2003),as described in the following sub-sections.5.1.1Contact initiation.The main‘competitors’of DEP such as AHK,Mercantil,Covisint,MeetWorldTrade, ChinaDotCom and e-Haier developed some comparable functionalities for the‘provision of company information’. DEP additionally offers a smart evaluation service through CC to support OEMs in selecting the most proper partner. Afterfinding an appropriate partner or a list of potential partners,the direct contact to the chosen partners has to be established.SupplyOn offers such a functionality similar to DEP,but only offers standard forms.DEP provides an individual‘Request for Quote’form which can be generated by the RN component and modified via the component SM.The remarkable advantage of DEP in comparison to other e-portals is the focus on the large potential Chinese market.Contact initiation is promoted and supported in China by preferential government policies for joint venture establishment with western countries.5.1.2Supply chain partnership.Owing to the advanced enabling technology of PDM(Miller et al.1997)which streamlines the process of building and maintaining a complete manufacturing database of parts and bills of material(BOMs),collaborative product data exchange and share can be performed through an inter-component of DRAGON–DIB,to support establishing the supply chain partnership from the early stage of contact initiation: supplier registration,supplier retrieval,supplier evaluation, and supplier negotiation.External data exchange adapter(EDEA)is developed under DIB to take charge of across-company product data searching,changing and sharing regardless of heteroge-neous data platforms.EDEA facilitates a better integration of suppliers within the value chain and consequently for the whole process of engineering collaboration.96 D.Liu et al.T a b l e 1.W o r l d w i d e c o m p e t i t o r s o f D R A G O N e n g i n e e r i n g p o r t a l .P o r t a l s P r o v i d e r sP o r t a l d e s c r i p t i o n sC I S C P C PD C SD E P E U -C h i n aA n e n g i n e e r i n g p o r t a l t o s u p p o r t t h e w h o l e b u s i n e s s p r o c e s s u n d e r a s t r o n g c u l t u r a l a s s i s t a n c e f o r c o n t a c t i n i t i a t i o n a n d c o l l a b o r a t i v e p r o d u c t d e v e l o p m e n t b e t w e e n E u r o p e a n d C h i n a w i t h a w i d e r a n g e o f p o r t a l s e r v i c e s i n c l u d i n g :r e q u e s t a n d n a v i g a t i o n ;c h e c k o f c o l l a b o r a t i o n ,p r o c e s s m o d e l l i n g ;s p e c i f i c a t i o n m o d e l i n g ;v i s u a l i z a t i o n a n d v a l i d a t i o n .(h t t p ://w w w .D R A G O N .u n i -k a r l s r u h e .d e )X X X X A H KG e r m a n y ,H o n g k o n g ,C h i n aA n o f f i c i a l p o r t a l t o s u p p o r t S M E s i n t h e i r e f f o r t s t o e x p l o r e p o t e n t i a l a n d b u s i n e s s o p p o r t u n i t i e s i n C h i n a .T h e c o r e s e r v i c e s f o c u s o n t h e p r o v i s i o n o f e c o n o m i c d a t a ,t h e m o n i t o r i n g o f d e v e l o p m e n t s ,t h e s e a r c h f o r s u i t a b l e b u s i n e s s p a r t n e r s a n d t h e i n d i v i d u a l c o n s u l t a t i o n f o r c o m p a n i e s .(h t t p ://w w w .a h k .o r g .h k )X X XM e r c a n t i l L a t i n A m e r i c a L a t i n A m e r i c a ’s l e a d i n g b u s i n e s s p o r t a l ,w h i c h s e r v e s a s t h e b r i d g e b e t w e e n t h e g l o b a l b u s i n e s s c o m m u n i t y a n d L a t i n A m e r i c a ’s e n t e r p r i s e s .O v e r 1.6m i l l i o n c o m p a n i e s i n d e x e d i n i t s b u s i n e s s d i r e c t o r y .(h t t p ://w w w .m e r c a n t i l .c o m )XC o v i s i n t G e r m a n y A l e a d i n g b u s i n e s s p o r t a l i n t h e a u t o m o t i v e i n d u s t r y f o r b u s i n e s s p a r t n e r s t o s h a r e t h e i r b u s i n e s s p r o c e s s e s w i t h t h e i r s u p p l i e r s a n d c u s t o m e r s v i a o n e c o m m o n f r a m e w o r k b u i l t o n s p e c i f i c a t i o n s f r o m C o v i s i n t s u p p l i e r s a n d O E M c u s t o m e r s .(h t t p ://w w w .c o v i s i n t .c o m )X X XS u p p l y O n N o r t h A m e r i c a A n e l e c t r o n i c m a r k e t p l a c e f r o m s u p p l i e r s f o r s u p p l i e r s i n t h e a u t o m o t i v e i n d u s t r y ,w h i c h o f f e r s c l i e n t s e -b u s i n e s s s e r v i c e s ,f u t u r e -p r o o f a n d e f f i c i e n t s o l u t i o n s w i t h a b u s i n e s s d i r e c t o r y ,b u s i n e s s m a n a g e r a n d s t a n d a r d m a n a g e r .(h t t p ://w w w .s u p p l y o n .c o m )X X XA I A G U S A A n e n g i n e e r i n g p o r t a l t o e n a b l e c o l l a b o r a t i v e e n g i n e e r i n g a n d p r o d u c t d e v e l o p m e n t f o r a l l p a r t i c i p a n t s i n t h e e x t e n d e d e n t e r p r i s e t o a c h i e v e c o s t s a v i n g s ,l e a d -t i m e r e d u c t i o n ,a n d q u a l i t y i m p r o v e m e n t i n g l o b a l a u t o m o t i v e s u p p l y c h a i n .(h t t p ://w w w .a i a g .o r g )X Xe -V i s U S A A t e a m c e n t r e c o m m u n i t y e n a b l i n g c l i e n t s t o c a r r y o u t c o l l a b o r a t i v e d e s i g n r e v i e w ,e l e c t r o n i c p u r c h a s i n g ,e n g i n e e r i n g c h a n g e m a n a g e m e n t a n d p r o j e c t a d m i n i s t r a t i o n .(h t t p ://w w w .e -v i s .c o m )X XC o C r e a t eG e r m a n y ,J a p a nA c o l l a b o r a t i o n p o r t a l f o r C A D s o f t w a r e d e v e l o p m e n t b y i m p r o v i n g i n n o v a t i o n a n d p r o d u c t i v i t y b u t i t s e -m a r k e t p l a c e i s o n l y a v a i l a b l e f o r s u p p o r t c u s t o m e r s w i t h c u r r e n t s u p p o r t c o n t r a c t s .(h t t p ://w w w .c o c r e a t e .c o m )X XM e e t W o r l d -T r a d e U S A A n e t w o r k o f A s i a n e -m a r k e t p l a c e s w h i c h h e l p p u r c h a s i n g p r o f e s s i o n a l s a n d s o u r c e v e n d o r s i n d e v e l o p i n g e c o n o m i e s b y a b u y e r n e t w o r k a n d a t r a d e s e r v i c e c e n t r e p r o v i d i n g c u s t o m s o u r c i n g ,s u p p l i e r a s s e s s m e n t ,i n -c o u n t r y m e e t i n g a n d f a c t o r y v i s i t s .(h t t p ://w w w .m e e t w o r l d t r a d e .c o m )X X XC h i n aD o t -C o mH o n g K o n g ,C h i n aA l e a d i n g i n t e g r a t e d e n t e r p r i s e s o l u t i o n a n d s o f t w a r e c o m p a n y o f f e r i n g t e c h n o l o g y ,m a r k e t i n g ,e -b u s i n e s s s t r a t e g y a n d s u p p l y c h a i n m a n a g e m e n t b y s u p p o r t i n g a l l i a n c e s a n d p a r t n e r s h i p s t o h e l p d r i v e i n n o v a t i v e c l i e n t s o l u t i o n s .(h t t p ://w w w .c o r p .c h i n a .c o m )X X XM e e t C h i n aS h a n g h a i ,C h i n aC h i n a ’s l e a d i n g t r a d e p o r t a l ,a w h o l l y o w n e d s u b s i d i a r y o f M e e t W o r l d T r a d e ,w i t h t h e w o r l d ’s l a r g e s t o n l i n e d a t a b a s e o f 30,000C h i n e s e s u p p l i e r s a n d p r o d u c t s a n d a n i n t e g r a t e d s u i t e o f t r a d e s e r v i c e s t o f a c i l i t a t e t r a n s a c t i o n s o n l i n e a n d g i v e b u y e r s a r a n g e o f c h o i c e s f o r p o s t -p u r c h a s e s e r v i c e s .(h t t p ://w w w .c o r p .c h i n a .c o m /i n d e x .h t m l )X X(c o n t i n u e d )A networked engineering portal97。