系统信息

Firstly. the mathematical model of IS based on set theory is provided. Then perfectibility and redundancy of information and attributes in IS are discussed.

首先 。文中给出了基于集合论的信息系统的数学模型，然后就信息系统中信息和属性的完备性和冗余程度两个方面进行了讨论。

The real-time system put forward here is a soft real-time system based on Windows NT. Preemptive multitasking mechanism is used on NT, in this way, the beyond-visual-range and real-time transmission of the TIS and command/control information can be realized via data link relayed by synchronous satellite.

实现的实时系统是一个基于Windows NT的弱实时系统，它通过在NT上采用多任务抢占机制以及同步卫星为中继的数据链路实现了TIS信息和指控信息的超视距实时传输，解决了信息的超视距实时传输问题。

Aiming at this,this paper appends additional information——preference relation into information system and uses it to guide the procedure of finding an reduct,which will produce optimal reduct under preference.

以此为研究目标，通过在信息系统上增加额外的信息-偏序关系，利用此关系指导属性约简的过程，求出该偏序关系下的最优约简，并运用该最优约简对原信息系统进行维约简。

According to the abstraction and quantitative difficulty of en- terprise culture,the entropy method and the grey fuzzy corn prehensive evaluation are synthesizing adopted.

二确定信息企业文化评价指标信息企业文化评价指标是一个多元、动态、综合的复合系统，选取指标要从系统的角度出发，选取能够科学而准确地反映信息企业文化特点的指标。

In this paper,with respect to the ordinal variables,the definitions of attribute reduction of dominance-based rough set approach in ordered information systems and ordered decision tables are given.Then the approach of sorting objects comprehensively using rough set theory is brought in to obtain a series of ranks.Based on these ranks,nonparametric methods to analyze correlation between two attribute subsets are introduced,and Spearman rank correlation coefficient is used as a measure of attribute correlation.Based on this measure,a new method of attribute reduction of ordered information systems and ordered decision tables is presented without changing the ordinal information of the universe.

针对有序尺度变量，给出了有序信息系统与有序决策表在优势关系下的粗糙集约简定义；利用粗糙集方法将对象综合排序，进而得到一组秩；根据这些秩，运用非参数统计的思想研究了两个属性子集之间的相关性，并将Spearman秩相关系数作为属性相关性度量；在不改变总体序信息情况下，给出了基于此度量对有序信息系统与有序决策表进行约简的新方法。

So weather its model, formation, expression is rational or not is the key to implement many application systems successfully in enterprises, including CAPP.

因此，工艺信息模型、工艺数据格式和工艺信息表达的优劣决定了包括工艺信息系统在内的信息化系统能否在企业中成功的应用。

In view of the question for lower repeat improve rate and insufficient interflow and share, the paper present necessity for engineering geology and geography information system to realize the network. Combined the two databases of engineering geology and geography information system the method that how to transmit and interflow the datum through the data interflow center for users is introduced in detail.

针对工程地质信息资源的重复利用率低，数据不能充分交流与共享等工程地质作业中实际存在的问题，提出对工程地质地理信息系统实行网络化的必要性，并结合工程地质地理信息系统的两个数据库，详细介绍了用户是如何通过工程地质数据交流中心进行数据传输与交流的

In design of system,we make the system have ability of development.there are 12 parts in the system.they are teaching,continue teaching,research,communion,research of teaching,clerk,teaching in network,schoolfellow,news,service for working,managing information,bbs.they are divided to three groups.teaching,continue teaching,research,communion,research of teaching,clerk,teaching in network,schoolfellow are fixed.the content of news and bbs can be changed and renovated.

其中教学、继续教育、科学研究、对外交流、教研室、教职员、网络教育、校友为固定扩展模块；新闻公告系统和教学BBS为交互扩展模块，我们可以用它随时进行新闻的发布、更新，实现教师和学生之间的交流与沟通功能。；网络办公服务平台、教学科研管理信息系统为管理信息模块，系部的一般事务、内部信息的发布都可以在这个模块进行处理。

The storage method utilizes the periodic orbits embedded in chaotic attractors for information storage. The main idea is to map periodic points on the UPO inside the attractors to some specific information alphabet according to some mapping rule, and thus represent an information string as a sequence of periodic points.

这种存储方法利用离散时间混沌系统中的周期态进行信息存储，其核心思想是将吸引子中周期轨道上的周期点按照一定的规则映射为一定的信息符号，进而用混沌系统的一个周期点序列来代表一个信息串或字符串。

In the information security engineering, Risk Assessment plays an important part. It is the basis of the information system security systematism.

信息安全风险评估是信息系统安全工程的重要组成部分，是建立信息系统安全体系的基础和前提。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。