基于粗糙集和神经网络的联合模式识别系统

提出了一种划分属性离散区间的新方法．针对这种划分，提出一种约简和去噪的方法．随后，建立了粗糙集和LVQ神经网络的联合模式识别系统．最后，比较了用该系统和仅用神经网络进行识别的效果，证明了该方法的有效性．     

100万元以下政府投资项目发包的选择分析

合理选择100万元以下政府投资项目的发包方式,可有效保障项目顺利进行,并实现源头防腐。     

图象重建的最小距离算法

本文提出了图象重建的一种凸集投影算法.它的重建图象是所有满足投影约束的图象中与先验图象的距离最小者.该算法是就连续分布的图象导出的,重建图象时也不需在空域与频域间进行变换,是一种较OSPR方法更直接、更简单的方法.还对最小距离算法重建结果的存在性、唯一性、幂等性等性质作了证明.     

使用L集合的询问求值

本文提出了Ｌ集合的概念以及一种新的使用Ｌ集合的一阶数据库询问求值方法。因为这种方法对原数据库只增加一个新字句，所以询问求值的效率大为提高，而且因为可以直接使用Ｌ集合回答对数据库的询问，求值过程比较简单。     

三峡水轮发电机组最大容量和设临时转轮问题

三峡机组运行水头变幅大，为避免高水头小开度运行出现不稳定问题，宜设置最大容量．三峡水库因施工和移民安排分期蓄水，为使在较低水位的运行初期获得更多的经济效益，宜在最早投运的一批机组设置临时转轮．     

Advanced Geometric Modeler with Hybrid Representation

An advanced geometric modeler GEMS4.0 has been developed,in which feature representation is used at the highest level abstraction of a product model.Boundary representation is used at the bottom level,while CSG model is adopted at the median level.A BRep data structure capable of modeling non-manifold is adopted.UNRBS representation is used for all curved surfaces,Quadric surfaces have dual representations consisting of their geometric data such as radius,center point,and center axis.Boundary representation of free form surfaces is easily built by sweeping and skinning method with NURBS geometry.Set operations on curved solids with boundary representation are performed by an evaluation process consisting of four steps.A file exchange facility is provided for the conversion between product data described by STEP and product information generated by GEMS4.0.     

Varieties generated by T-norms

This is a survey of some work done recently on varieties generated by algebras arising in fuzzy set theory and logic. Details and proofs appear elsewhere. The hope is to impart some of the flavor of this particular topic, and to point out some areas that merit further study.     

Plus cupping degrees do not form an ideal

~~Plus cupping degrees do not form an ideal~~