数据库管理

Lastly, the thesis lays out the antetype of Technological Innovation Ability Evaluation Decision Support System , and designs the basic structure of the systems, which consist of man-machine conversation management system, problem processor syetem, modelbase management system, database management system, knowledgebase management system and methodbase management system. This thisis designs the database structure.

该体系结构由人机对话管理系统、问题处理系统、模型库管理系统、数据库管理系统、知识库管理系统及方法库管理系统6个相互关联的模块组成的系统；根据评价指标体系和指标的定义设计了企业技术创新能力评价的数据库结构。

At present, there are two branches in the research of database security technology, which are secure database management system and enhancive database security system. According to the view of enhancive database security system, this paper takes the typical TCSEC model as reference. An agent system is built between database client and database server for secure communication, SQL parsing and access controlling.

目前，我国数据库安全技术研究主要有安全数据库管理系统和数据库安全增强系统两个方向，本文主要从数据库安全增强系统的角度出发，参考经典的TCSEC监视器模型，在数据库客户端和服务器端之间建立一个代理系统，来完成数据库的安全通信、SQL分析和访问控制等功能。

Then, the implement technique in the database table design and image data explanation of a city landscape retrieval system is illustrated, and the authors also verified that using extended relational database management system to store and manage image data is effective and practicable.

现在面向对象数据库技术的应用还不够成熟，而且用户往往更喜欢在不改变原有数据库系统的基础上增加对多媒体文档管理的要求，故用扩展现存的关系数据库管理系统来支持类似于二进制对象的多媒

This thesis deeply researches the J2EE security strategy on the application tier of enterprise system. The security strategy predigests the information security model and meets the security requirements expediently. But there are some disadvantages when the security requirements become more complex. The expositive security on the Web-Tier can not offer more information for authentication; there is no authentication for EJB-Tier to use, make the EJB-Tier depend on the Web-Tier; J2EE uses database or application server to manage the role information. Use database to manage the role information will increase the complex of enterprise application, and the way of application server will reduce the ability of migrate other J2EE platform. To solve these problems, the thesis designs an improved security strategy model.

本文从企业级系统应用层安全的角度出发，深入研究J2EE多层体系结构的安全策略模型。J2EE提供的安全策略简化了系统的信息安全模型，能够很方便地满足基于J2EE的分布式应用系统的安全需求，但是在面对更加复杂的安全需求时，J2EE安全策略在验证授权和角色管理中还存在不足之处：其在Web层的声明式验证机制无法为用户提供更多验证信息，可扩展性较差；在EJB层缺少业务逻辑层可供采用的验证机制，而是借助于Web层的验证机制，其耦合程度较高有悖于业务逻辑分离于表现逻辑的原则；在角色管理方面，J2EE采用数据库或者应用服务器来管理角色信息，其中，数据库管理角色的方式增加了应用开发的复杂度，应用服务器管理角色降低了系统的可移植性，两者都具有片面性。

At the same time, with the improvement of large-scale relational database technology, GIS software is developing in the direction of the "centralization of management". That is to say, by making full use of the large-scale relational database technology, both spatial data and attribute data can be stored unitedly in database.

大型关系型数据库技术的日益完善，促使GIS软件都在向&集成管理&的方向发展，即充分利用关系数据库管理系统的优势，真正实现空间数据的一体化管理。

In database system, normally the database management system will in charge of retrieving and storing of data.

在数据库中，一般存取时的细节是由数据库管理系统管理，应用程序不必了解数据库的软件和硬件的改变。

Electronic map of MapInfo is introduced into the environment of object oriented by the use of Map X 4.0 module. The operations such as dynamic add, delete and edit of objects can be done real-time dynamically by operators in the environment of object oriented on the present diagram of polder region. At the same time, the spatial-data and attribute-data of irrigation district are managed separately. The spatial-data is used by the file system, whereas, the attribute-data exist in the relevent database. The figures and database are related through the only ID number in order to realize two-way inquiry, so that, the polder region river system planning data are collected automatically. Moreover, this system make the great use of GIS advantage in storing and annalising data to automatically organize files needed in river network calculation , adopt one-dimensional unsteady flow model , so as to lay out height of river levee .

把GIS技术引入水系规划，通过MapX4.0组件把MapInfo电子地图调入面向对象编程环境，使操作人员能在面向对象环境中对圩区现状图进行实时动态操作，包括对操作对象的动态添加、动态删除、编辑等；同时，将空间数据和属性数据分开进行管理，空间数据用文件系统管理，属性数据采用数据库管理，通过建立唯一ID号进行数据联接，将图形与数据库进行关联，实现属性到图形或图形到属性的双向查询，从而实现了圩区水系规划部分数据的自动采集；另外，本系统充分利用GIS存储与分析数据的功能，自动生成河网水力计算所需的文件，采用一维非恒定流模型进行河网水力计算，为确定沟道堤顶高程提供依据。

It is a DataBase Manage System which was empoldered by Microsoft , its function is powerful, and so far it is a preferred database software when exploituring medium-sized database in the market.

本网站选用的是Access数据库，它是美国Microsoft公司开发的数据库软件，具有强大的数据库管理功能，可以说是迄今为止市场上开发中型数据库首选的数据库软件之一。

Start with the network application in bank ,this article introduced the database safe and encryption technical, defined the safety of database, analysed the basic roll-over protective structure of database system and offered data safe major means, discussed the range and characteristic of database encryption technology .

本文从网络在银行业中的应用入手，就数据库安全与加密技术介绍了数据库安全的定义，分析了数据库系统的基本安全架构及其提供数据安全的主要手段，讨论了数据库加密技术的特点、范围以及对数据库管理系统原有功能的影响。

Thermochemical database management system is constructed. Due to the flexibilities and advantages of Delphi language in developing database management system , it is used to develop the TDBMS based on Windows 95/98. TDBMS is integrated in CPD system.

建立了完善热化学数据库管理系统，由于Delphi编制数据库应用程序的极端灵活性，本程序系统在Win95/Win98平台上，采用Delphi编程，编制了功能齐全的热化学数据库管理模块，并集成在化学位图绘制系统中。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。