利用模糊子集重叠性简化模糊系统的一种方法

根据模糊子集之间的重叠性，合并模糊子集，达到简化模糊系统，减少模糊规则数目换；使用遗传算法法提取模糊规划和优化模糊子集的隶属度函数，计算机模拟表明了上述方法的有效。     

关于问题1‖∑W_j(1—e~(-rC_j))的一点注记

对于问题1‖∑W_j(1-e~(-rC_j)),分别讨论了当 r 充分接近于零或所有权 W_j=1时的最优排序.     

一种基于粗糙集的冠心病数据分类方法

当数据的维数增加后,经典粗糙集分类方法将难以使用.本文针对经典的分类规则获取方法,在应用于高维的数据时,重要度计算所出现的问题,提出了改进方法,计算出了各个条件属性的重要度.然后根据获得的重要度,针对冠心病数据维数很高的特点,提出了新的分类规则获取方法.将这一思路应用于具体数据后,推导出了最终的分类规则,达到了准确的分类冠心病数据的最终目的.     

Research on two different mathematical theories on control

With a brand-new theory, this paper not only provides the differences of attributes in concept, formula expression and function type between fuzzy rough sets and probability statistics, but also introduces their differences in algorithms on target control for better solving the control problem. Some new definitions and theorems concerning fuzzy rough sets and probability statistics are given, but this paper mainly makes a comparison of two control algorithms for the target tracking. The simulation results show that the comprehensive performance of the fuzzy rough sets algorithm is better than that of the probability statistics algorithm, but its control effect is not as good as that of the latter on multisensor target control. Finally, some problems concerning the combination of fuzzy rough sets and the probability statistics phenomenon to be solved and development trends are discussed. By these investigations, we can choose the optimal control algorithms for accomplishing better target control.     

规则空间模型理论基础的改进

规则空间模型通过Q阵确定不可观察的知识状态,并把它转化为可观察的理想项目反应模式;其次把被试观察反应模式划归为某个理想项目反应模式.该文指出Tatsuoka求理想项目反应模式全集是错误的,并提出几种确定理想项目反应模式全集的方法和几种新的分类方法,并用蒙特卡洛模拟比较这些分类方法与规则空间方法的优劣.     

A largest-distance pivot rule for the simplex algorithm

We propose a new pivot rule for the simplex algorithm, which is demonstrative in the dual space intuitively. Although it is based on normalized reduced costs, like the steepest-edge rule and its variants, the rule is much simpler and cheaper than the latter. We report computational results obtained with the 47 largest Netlib problems in terms of the number of rows and columns, all of the 16 Kennington problems, and the 17 largest BPMPD problems. Over the total 80 problems, a variant of the rule outperformed the Devex rule with iterations and time ratio 1.43 and 3.24, respectively.     

高校图书馆外借图书批注圈点利弊谈

根据高校图书馆外借图书被批注、圈点等现象,阐述了外借图书批注圈点的形式和特点,并结合本馆的实例,分析外借图书批注圈点的利与弊.     

三峡库区(万州)生活垃圾总氮的浸出规律研究

生活垃圾堆场里面的很多物质都会影响到周围环境,其中含氮污染物在自然条件下容易浸出,进入到水体中造成环境污染.通过对生活垃圾堆场渗滤液中总氮含量的测定;以及结合到三峡库区(万州)的自然条件,考查浸出时间、温度、浸泡液pH值的浸出条件,对生活垃圾中总氮浸出量的影响,明确了生活垃圾中总氮在自然条件下的浸出特点,和对自然环境的影响程度.