Papers school student management system for background information on the basic tenets of systems development, structure, methods and processes.
论文以学校学生的管理系统为背景，论述了信息系统开发的基本原理，结构，方法和过程。
RDBMS is based on firm mathematics set theory with simple and clear data structure, and powerful query function, so it has become the basic technology for realization of information system.
因为RDBMS是建立在严格的数学集合论基础上的，数据结构简单、清晰，具有强大的查询能力，RDBMS成为实现信息系统的基本技术。
The system structure and the basic idea of ship navigation image information recording, the coding principle and compression method of image information are introduced in the paper.
介绍船舶航行图像信息记录的系统构成、航行图像信息记录基本思路和图像信息编码原理及压缩方法。
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