中英文专业资料
中文资料
PowerBuilder是著名的数据库应用开发工具生产厂商PowerSoft公司推出的产品（PowerSoft现已被数据库厂商Sybase所收购），它完全按照客户机/服务器体系结构研制设计，在客户机/服务器结构中，它使用在客户机中，作为数据库应用程序的开发工具而存在。由于PowerBuilder采用了面向对象和可视化技术，提供可视化的应用开发环境，使得我们利用PowerBuilder，可以方便快捷地开发出利用后台服务器中的数据和数据库管理系统的数据库应用程序。
在当前，网络技术迅速发展，随之发展的还有OLE，OCX，跨平台等技术，而在PowerBuilder的最新版PowerBuilder中提供了对这些技术的全面支持。总之在数据库开发工具领域，PowerBuilder是其中非常优秀的一个，利用它我们可以开发出功能强大的数据库应用程序。
PowerBuilder提供了对目前流行的大多数关系数据库管理系统的支持，由于在PowerBuilder的应用程序中对数据库访问的部分一般采用国际化标准数据库查询语言SQL，使得用PowerBuilder开发的应用程序可以不做修改或者只做少量的修改就可以在不同的后台数据库管理系统上使用。也就是说用PowerBuilder开发的应用程序是独立于服务器上的数据库管理系统的。
和大多数的windows应用程序一样，PowerBuilder也是事件驱动工作方式。在这种工作方式中，程序的运行没有固定的流程，程序中的代码也是为各种可能发生的事件编写的，当程序开始运行之后，它就可以接受来自系统，用户或者其它应用程序触发的事件，然后执行相应的事件代码。事件驱动的工作方式与面向对象技术是紧密相关的。在PowerBuilder应用程序中，接受发生的事件的往往就是程序界面中的各种可视化对象。
PowerBuilder是一种面向对象的开发工具，各种windows应用程序中常见的窗口、菜单、控件等在PowerBuilder中都是一个个的对象。在PowerBuilder中我们还可以创建自己的用户对象。特别要指出的是PowerBuilder提供了对面向对象方法中的各种技术的全面支持，我们可以利用面向对象方法中的对象的封装性、继承性、多态性等特点使得我们开发的应用程序具有极大的可重用性和可扩展性，而这一点正是软件工程中对应用程序所提出的重要目标。
在当前，由于网络技术的发展，许多种不同的操作系统平台在INTERNET网上同时被使用，这对开发的应用程序的跨平台性提出了更高的
要求，而PowerBuilder就提供了良好的跨平台性，比如在PowerBuilder 中，利用windows平台开发的各种对象可以方便地应用到UNIX平台中，因为PowerBuilder支持对象的跨平台性。这样使得把应用程序从一个平台移到另一个平台变得并不复杂。
为了给用户提供各个方面的支持，PowerBuilder具有自己的编程语言POWERSCRIPT，这个语言除了提供基本的流程控制语句，还提供了几百个函数来操纵各种对象和提供诸如DDE，OLE等方面的支持。此外我们还可以定义自己的函数，处理特定的事件。学习PowerBuilder时相当一部分的时间就是用来了解和熟悉PowerBuilder提供的各种函数。
PowerBuilder一个很大的特点就是提出了数据窗口对象的概念。数据窗口对象也是PowerBuilder中的一种对象类型，与其它对象不同的是数据窗口对象是专门为了访问后台的数据库服务的，在数据窗口对象中我们定义了数据的来源和数据的显示风格，这样在应用程序中我们就可以把精力完全放在程序的运行流程控制上，而不用关心具体数据的来源，因为我们在数据窗口对象中已经定义好了数据的来源。如果需要使用数据库中不同的数据也只要对数据窗口对象进行修改就可以了。特别要指出的是PowerBuilder在数据窗口对象中提供了丰富的数据显示方式，可以满足各种不同的需要。
在PowerBuilder较新的版本中提供了基础类库PFC，它为应用程序的开发提供了许多可重用的预定义类和对象，利用基本类库PFC可以快速开发出高质量重用性好的应用程序。真正发挥面向对象编程的巨大威力。
最后要指出的是PowerBuilder有三个不同的版本，分别为DESKTOP 型，PROFESSIONAL型，和ENTERPRISE型，DESKTOP型是为个人使用的桌面型应用程序，在这里可以利用PowerBuilder内置的数据库管理系统SYBASE SQL ANYWHERE来创建和使用本地数据库，为个人的应用服务；PROFESSIONAL型的PowerBuilder最重要的一点就是提供了对MICROSOFT ODBC（数据库标准连接接口）的支持，在PROFESSIONAL版本中我们就可以使用PowerBuilder的继承，多态等绝大多数特性；在ENTERPRISE版本中最重要的一点就是提供了对开发大型的数据库应用程序的全面的支持，提供了开发大型应用程序的许多辅助的工具，比如C++ CLASS BUILDER等。
数据库前端开发工具与后台数据库管理系统的连接方式是一个很重要的课题。PowerBuilder提供了两种访问后台数据库的方式，一种是通过ODBC标准接口的方式，第二种是通过专用的接口与后台的数据库相连。
ODBC的中文名字是开放式数据库连接，它是微软公司提出的数据库连
接标准，使用ODBC方式连接数据库的第一步是创建数据源，比如我们可以利用windows下控制面板中的“32 BIT ODBC”选项来创建驱动某种数据库的数据源，创建好数据源之后，我们就可以在本地计算机中利用定义好的数据源存取后台数据库中的数据了。
我们还可以通过专用接口同后台的数据库相连，由于专用接口是针对特定的后台数据库管理系统而设计，因此这种方式存取数据的速度要比采用ODBC方式存取数据的速度要快一些，如果我们的应用程序只是针对特定类型的后台数据库，当然是采用专用接口访问后台数据更快一些。
英文资料
PowerBuilder is a popular database application development tool manufacturer which is called PowerSoft introduced product （PowerSoft has been purchased by the database manufacturer called Sybase）, it entirely designed in accordance with the client / server architecture, in the client / server architecture, it uses the client, as a database application development tool to exist. Because of using object-oriented and visualization technologies, providing visual application development environment in PowerBuilder, allows us to be developing data and database management system database applications in the background server easily and quickly.
At present, network technology is developing rapidly, with the development of the OLE, OCX, cross-platform technology, and in the latest version of PowerBuilder provides the full support of these technologies. In a word, in the database development tools, PowerBuilder is a very good product of them, we can use it to develop powerful database applications.
PowerBuilder provides support in most of the current popular relation database management systems, because in PowerBuilder applications for database access part of the general international standard database query language SQL, makes using PowerBuilder development of the application can be used in different background of database management systems without revision or do a small amount of revision. That is to say, with PowerBuilder development of the application server is independent of the database management system.
As the most of the windows application procedures, PowerBuilder is also event driven of the method to work. In this work method, program for the operation has no fixed processes, the code in the program is also possible programmed for the preparation of the events, when the program began running, it can be accepted the events that are from the system, users or other applications trigger, and then execute the relevant code. Event driven methods of work is
closely related to the object-oriented technology. In the PowerBuilder application, acceptance of the events is often the various visual interface object in the program.
PowerBuilder is an object-oriented development tool, various common application windows, menus, and other controls in Windows are one and one targets in PowerBuilder. We can also create own user object in PowerBuilder. We should point out that the PowerBuilder provides object-oriented method of comprehensive technical support, we can make use of object-oriented methods in the object of encapsulation, inheritance, polymorphism, and other features make the our development applications have great reusability and scalability, which is on the application in the process of the important goals in software engineering.
At present, due to the development of network technology, and many different types of operating system platforms are using on the internet at the same time, this is a higher request for the development of the cross-platform application, and PowerBuilder provides a good cross-platform, for example, in PowerBuilder, using Windows platform for the development of all kinds of objects can be easily applied to the UNIX platform, because PowerBuilder supports cross-platform object. This allows the applications from one platform to another platform to become not complicated.
In order to provide the user all aspects of supports, PowerBuilder has its own programming language which is called power script, in addition to providing the basic flow control statements, but also to provide hundreds of functions to manipulate objects and all kinds of information supports such as DDE, OLE, and other aspects in this language . Furthermore, we can also define our own functions and deal with specific incidents. When we learn PowerBuilder, a part of the time is to understand and familiar with the functions in PowerBuilder.
In PowerBuilder, a great feature is to propose the concept of data window. Data window object is one of the objects in PowerBuilder, it is different from other objects, because data window is
specifically targeted to visit background database services, in the data window, we define data sources and data display style, so that we will be able to concentrate fully on the operation of process control procedures in application procedures, and couldn’t concern about data sources, because we have been well defined data sources in the data window. If you need to use different data in the database as long as the data is revised target window on it. In particular, we should point out that the PowerBuilder provides a wealth of data display mode in data window object, and this can meet a variety of needs.
In a new version of PowerBuilder, it provides a foundation class library PFC, it provides many reusable predefined classes and objects for application procedures of development, using the basic class library PFC can enable the rapid development of high-quality reuse of good application procedures. It is really rolling power of object-oriented programming.
Finally we should point out that the there are three different versions: desktop type, professional type, and enterprise type. Desktop type is for personal using of the desktop applications, where you can use the built-in PowerBuilder database management system Sybase SQL anywhere to create and use of local databases, the application for personal services; professional type of PowerBuilder most important point is to provide the support of Microsoft ODBC （database connectivity standard interface）,in professional version of PowerBuilder, we can use the inheritance, polymorphism and more features; in the enterprise versions of the most important point is to provide for the development of large-scale database applications and comprehensive support, the development of large-scale applications of the many auxiliary tools, such as C++, class builder and so on.
Database front-end development tool and the background database management system in a way is a very important issue. PowerBuilder provides two ways to visit the background database, the one way is standard interface through ODBC, and the second is through a
dedicated interface with the database linked to the background.
ODBC is called Open Database Connectivity in Chinese, it is the database connectivity standards which is proposed by Microsoft, the use of ODBC database connectivity of the first step is creating data sources, for example, we can use windows control panel under the "32 BIT ODBC" election of the drive to create a database of data sources, after finishing creating data sources, we will be able to use computers in the local definition of good background data source to access to the data in the database.
We can also link to the background through a dedicated interface with the database, because dedicated interface is designed against the background of a specific database management system, by this way to access to data faster than using ODBC way to access to data. If our application is only for specific types of background database, of course, using a special interface to background information will be more faster.
PS中英文对照资料
Photoshop中英文对照 1、File 文件 New 新建 Open 打开 Open As 打开为 Open Recent 最近打开文件 Close 关闭 Save 存储 Save As 存储为 Save for Web 存储为Web所用格式Revert 恢复 Place 置入 Import 输入 PDF Image PDF图象导入Annotations 注释 Export 输出 Manage Workflow 管理工作流程Check In 登记 Undo Check Out 还原注销 Upload To Server 上载到服务器Add To Workflow 添加到工作流程 Open From Workflow 从工作流程打开 Automate 自动 Batch 批处理 Create Droplet 创建快捷批处理 Conditional Mode Change 条件模式更改 Contact Sheet 联系表 Fix Image 限制图像 Multi Page PDF to PSD 多页面PDF文件到PSD文件 Picture package 图片包 Web Photo Gallery Web照片画廊File Info 文件简介 Print Options 打印选项 Page Setup 页面设置 Print 打印 Jump to 跳转到 Exit 退出 2、Edit 编辑 Undo 还原 Step Forward 向前 Step Backward 返回 Fade 消退 Cut 剪切 Copy 拷贝 Copy Merged 合并拷贝 Paste 粘贴 Paste Into 粘贴入 Clear 清除 Fill 填充 Stroke 描边 Free Transform 自由变形Transform 变换 Again 再次 Scale 缩放 Rotate 旋转 Skew 斜切 Distort 扭曲 Perspective 透视 Rotate 180°旋转180度 Rotate 90°CW 顺时针旋转90度Rotate 90°CCW 逆时针旋转90度
计算机专业外文文献及翻译
微软Visual Studio 1微软Visual Studio Visual Studio 是微软公司推出的开发环境，Visual Studio可以用来创建Windows平台下的Windows应用程序和网络应用程序，也可以用来创建网络服务、智能设备应用程序和Office 插件。Visual Studio是一个来自微软的集成开发环境IDE，它可以用来开发由微软视窗，视窗手机，Windows CE、.NET框架、.NET精简框架和微软的Silverlight支持的控制台和图形用户界面的应用程序以及Windows窗体应用程序，网站，Web应用程序和网络服务中的本地代码连同托管代码。 Visual Studio包含一个由智能感知和代码重构支持的代码编辑器。集成的调试工作既作为一个源代码级调试器又可以作为一台机器级调试器。其他内置工具包括一个窗体设计的GUI应用程序，网页设计师，类设计师，数据库架构设计师。它有几乎各个层面的插件增强功能，包括增加对支持源代码控制系统（如Subversion和Visual SourceSafe）并添加新的工具集设计和可视化编辑器，如特定于域的语言或用于其他方面的软件开发生命周期的工具（例如Team Foundation Server的客户端：团队资源管理器）。 Visual Studio支持不同的编程语言的服务方式的语言，它允许代码编辑器和调试器（在不同程度上）支持几乎所有的编程语言，提供了一个语言特定服务的存在。内置的语言中包括C/C + +中（通过Visual C++）,https://www.360docs.net/doc/012605606.html,（通过Visual https://www.360docs.net/doc/012605606.html,），C＃中（通过Visual C＃）和F＃（作为Visual Studio 2010），为支持其他语言，如M,Python,和Ruby等，可通过安装单独的语言服务。它也支持的 XML/XSLT,HTML/XHTML ,JavaScript和CSS.为特定用户提供服务的Visual Studio也是存在的：微软Visual Basic，Visual J＃、Visual C＃和Visual C++。 微软提供了“直通车”的Visual Studio 2010组件的Visual Basic和Visual C＃和Visual C + +，和Visual Web Developer版本，不需任何费用。Visual Studio 2010、2008年和2005专业版，以及Visual Studio 2005的特定语言版本（Visual Basic、C++、C＃、J＃），通过微软的下载DreamSpark计划，对学生免费。 2架构 Visual Studio不支持任何编程语言，解决方案或工具本质。相反，它允许插入各种功能。特定的功能是作为一个VS压缩包的代码。安装时，这个功能可以从服务器得到。IDE提供三项服务：SVsSolution，它提供了能够列举的项目和解决方案; SVsUIShell，它提供了窗口和用户界面功能（包括标签，工具栏和工具窗口）和SVsShell，它处理VS压缩包的注册。此外，IDE还可以负责协调和服务之间实现通信。所有的编辑器，设计器，项目类型和其他工具都是VS压缩包存在。Visual Studio 使用COM访问VSPackage。在Visual Studio SDK中还包括了管理软件包框架(MPF)，这是一套管理的允许在写的CLI兼容的语言的任何围绕COM的接口。然而，MPF并不提供所有的Visual Studio COM 功能。
商务英语口语900句-中英文对照-中文翻译资料
商务英语口语900句中英文对照中文翻译 Unit 1希望与要求 Part 1 . 1. We'd like to express our desire to establish business relationship with you on the basis of quality, mutually benefit and exchange of needed goods . 我们希望在保证质量、互惠互利以及交易彼此需要的货物的基础上和你们建立业务关系。 2 .In order to extend our export business to your country we wish to enter direct business relations with you. 为了扩大我们在贵国的出口业务，我们希望和你们建立直接贸易关系。 3. Our hope is to establish mutually beneficial trading relations between us . 希望在我们之间能够建立互惠互利的贸易关系。 4. We looking forward to further extensions of pleasant business relations. 我们期待进一步保持愉快的业务关系。 5. It’s our hope to continue with considerable business dealing with you. 我们的希望是和你们保持可观的生意往来。 6. We looking forward to receiving your quotation very soon. 我们期待尽快收到你们的报价单。 7.I hope you see from the reduction that we are really doing our utmost. 我希望你能够看到我们事实上已经作出了最大程度的让价。 8.We hope to discuss business with you at your earliest convenience. 我们希望在你方便的时候和你洽谈业务。
中英文专业资料
中文资料 PowerBuilder是著名的数据库应用开发工具生产厂商PowerSoft公司推出的产品（PowerSoft现已被数据库厂商Sybase所收购），它完全按照客户机/服务器体系结构研制设计，在客户机/服务器结构中，它使用在客户机中，作为数据库应用程序的开发工具而存在。由于PowerBuilder采用了面向对象和可视化技术，提供可视化的应用开发环境，使得我们利用PowerBuilder，可以方便快捷地开发出利用后台服务器中的数据和数据库管理系统的数据库应用程序。 在当前，网络技术迅速发展，随之发展的还有OLE，OCX，跨平台等技术，而在PowerBuilder的最新版PowerBuilder中提供了对这些技术的全面支持。总之在数据库开发工具领域，PowerBuilder是其中非常优秀的一个，利用它我们可以开发出功能强大的数据库应用程序。 PowerBuilder提供了对目前流行的大多数关系数据库管理系统的支持，由于在PowerBuilder的应用程序中对数据库访问的部分一般采用国际化标准数据库查询语言SQL，使得用PowerBuilder开发的应用程序可以不做修改或者只做少量的修改就可以在不同的后台数据库管理系统上使用。也就是说用PowerBuilder开发的应用程序是独立于服务器上的数据库管理系统的。 和大多数的windows应用程序一样，PowerBuilder也是事件驱动工作方式。在这种工作方式中，程序的运行没有固定的流程，程序中的代码也是为各种可能发生的事件编写的，当程序开始运行之后，它就可以接受来自系统，用户或者其它应用程序触发的事件，然后执行相应的事件代码。事件驱动的工作方式与面向对象技术是紧密相关的。在PowerBuilder应用程序中，接受发生的事件的往往就是程序界面中的各种可视化对象。 PowerBuilder是一种面向对象的开发工具，各种windows应用程序中常见的窗口、菜单、控件等在PowerBuilder中都是一个个的对象。在PowerBuilder中我们还可以创建自己的用户对象。特别要指出的是PowerBuilder提供了对面向对象方法中的各种技术的全面支持，我们可以利用面向对象方法中的对象的封装性、继承性、多态性等特点使得我们开发的应用程序具有极大的可重用性和可扩展性，而这一点正是软件工程中对应用程序所提出的重要目标。 在当前，由于网络技术的发展，许多种不同的操作系统平台在INTERNET网上同时被使用，这对开发的应用程序的跨平台性提出了更高的
外文资料及其翻译
A Wavelet Based Approach for Fast Detection of Internal Fault in Power Transformers The power transformer is one of the most expensive elements of power system and its protection is an essential part of the overall system protection strategy. The differential protection provides the best protection for power transformer. Its operation principle is based on this point that the differential current during an internal fault is higher than normal condition. But, a large transient current (inrush current) can cause mal-operation of differential relays. Then, studies for the improvement of the transformer protection have focused on discrimination between internal short circuit faults and inrush currents in transformers. The magnetizing inrush current has a large second order harmonic component in comparison to internal faults. Therefore , some transformer protection systems are designed to halt operating during the inrush current by sensing this large second order harmonic. The second harmonic component in the magnetizing inrush currents tend to be relatively small in modern large power transformers because of improvements in the power transformer core materials. Also , it has been seen that the fault current can contain higher second order harmonics than the inrush current due to nonlinear fault resistance, CT saturation .the distributed capacitance in the transmission line, which transformer is connected to, or due to the use of extra high voltage underground cables. Various methods have been suggested for overcoming this protection system mal-operation. This paper presents a wavelet based method for discrimination among inrush current, internal short circuit ,external short circuit and energizing and it is not affected by CT saturation and it is able to detect internal faults while transformer energization. Unlike Artificial Neural Network and Fuzzy logic based algorithms. This approach is not system dependent. The operating time of the scheme is less than 10ms. The Daubechies mother wavelet is used with a sample rate of 5 kHz. Then , the differential currents of the three phases are decomposed into two details and only the second level will be considered by using db5 mother wavelet. Discrete Wavelet Transform The wavelet transform is a powerful tool to extract information from the non-stationary signals simultaneously in both time and frequency domains. The ability of the wavelet transform to focus on short time intervals for high-frequency components and long intervals for low-frequency components improves the analysis
外文文献及翻译
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PLC论文中英文对照资料外文翻译文献
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