查询词典 network database

The system is designed according to the mechanism of CAD Standard Part Graphies Files. SQL Server 2000 is selected as the host and construct the database of part liabrary due to characteristic parameter. STEP, viz. ISO 10303, is issued by international standardization organization, and here ,this paper gives the definition of product information model oriented part41 and part44 in STEP and six basic definienses which describe the product information to ensure the information in the product information model correct and shareable . This paper also presents method of creating and extracting product information on engineering draught and product data exchange and integration between CAD system and database manager system.

论文中采用&CAD标准件图形文件机制&，用SQL Server2000数据库建立了零件的特征参数数据库，完成了零件库的特性参数库建库工作；依据国际标准化组织的STEP标准即ISO 10303中的Part41，Part44两部分内容以及STEP标准中描述产品信息的六个基本的类库定义，提出了一种产品信息模型，保证了产品信息模型中信息的正确性和共享性，实现了工程图样中产品管理信息的建立和提取以及数据库系统与图形文件中的管理信息交换与集成。

According to practical situation of the currency MIS development and application, by anatomizing the structure of relation database, this paper puts forward a reconstruction model based on application layer data mode to realize the logistic independency between application program and database.

根据国内通用MIS系统开发和应用的实际情况，在深入剖析关系数据库结构的基础上，提出一种基于应用层数据模式的关系数据库重构模型，实现了应用程序和底层数据库的逻辑独立。

Chapter 4 constructs the database (Social Accounting Matrix-SAM) of the model,and calibrates the parameters of the model by using the database.

第四章建立模型的数据基础并通过此求解模型中的参数。

Select a database to open it, help to see this help and about to read author and copyleft details. To open a database it is also required a password because they are ciphered.

要打开一个数据库也需要输入密码，因为它们已被加密保存了，点击&新建&可创建一个需要输入名称与密码的数据库(密码未输将不作加密保护)。

According to the data structure of the system database, this thesis conjoins the breath-first search and the depth-first search, and constructs the positive direction reasoning mechanism to make use of the specialty knowledge in the database.

根据系统知识库的数据结构和知识的表达方式，采用广度优先搜索和深度优先搜索相结合的策略，建立正向推理机制以实现对系统知识库中专业知识的利用。

With the database application more and more widespread, the database modelling method also unceasingly is consummating.

数据库的应用越来越广泛，数据库建模的方法也在不断完善。

Then it elucidates the creation of the database by the E-R diagram and the design of the database.

然而，在计算机网络中，任何方便实用的技术都必须建立在信息安全这块基石上。

Then it elucidates the creation of the database by the E-R diagram and the design of the database.

接着通过E-R图说明数据库的搭建和数据库的设计。

In order to establish the systematic structure of Web Serves and enhance reusability of the software and safety of application syste m,this paper lays emphasis on researching and analyzing technology of loginning,data enciphering,database connection visiting,ensuring database safety,defending Web attack and reserving data to avoid any disaster and then gives some better corresponding solutions.

为了搭建多层结构的分布式Web应用系统的Web Servers体系结构，提高软件的可重用性及应用系统的安全性，本文重点对遥程数据库维护中的登录技术、数据加密技术、数据库连接访问技术、数据库安全技术、防Web攻击技术及远程数据容

By database encrypting, and key management and users access control, we can protect the database from destroying .

通过数据加密、密钥管理、用户访问控制等一系列的手段来保护数据库内部数据的安全。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。