模糊规则的表示方法研究

在已有的各种推理方法中,所使用的产生式规则表示形式都不统一,其中含有的信息量也不一样,有的少,有的多,各有侧重点,但都不全面,因而不能把它们作为模糊知识的统一表示形式．其根本的原因就是推理模型本身不完备．本文描述的通用模糊规则,是建立在通用不确定模型和模糊集合理论的基础之上的知识统一表示形式,也是通用模糊推理算法的基础．这种方法采用可能性分布理论来表示知识的模糊性,对一般规则表示进行全面的模糊化,全面考虑了知识的模糊性．它含有推理所需的丰富信息,能用于表达各种情况的模糊性,有着广泛的适用性．已有的规则形式,如确定性知识的规则表示等,只是这种通用形式在忽略部分模糊性情况下的特例．这种表示方法在飞机总体外形设计模糊专家系统（ＡＣＤＳ－ＦＥＳ）中得到了很好的运用．     

Recent Developments in the Study on Oriented Silicon Steel Sheets

1 IntroductionElectrical steels have been researched and developedfor more than one cense for their great application inpower and electronic devices. Nowadayshigh-Performance silicon steels are widely used inproducing high power generator and Precision adapterand so on. High oriented silicon steels have goodmagnetic induction and less iron loss. Depending on therequirements of electrical indusal and electronics devices,tWo typical cold-rolled silicon steel sheets are Produced inindusal i.e.,…     

分数维变换域滤波在图像恢复中的应用

傅立叶变换是对信号进行分析的重要数学工具之一．广义上的傅立叶变换,即分数维变换已成为时变信号分析的强有力工具．对原始信号估计的判据常采用均方误差．时间为Ｏ（ＮｌｏｇＮ）的Ｗｉｅｎｅｒ滤波可完成对具有时不变退化模型的信号估计,若退化模型为时变或非平稳的,则需Ｏ（Ｎ ２）的估计时间．这里用在分数维变换域中进行滤波来实现图像恢复,估计时间亦为Ｏ（ＮｌｏｇＮ）,且均方误差比在普通傅立叶变换域中的滤波小．实验中,对具有不同信噪比的时变退化模型（ ｃｈｉｒｐ函数污染）的图像进行恢复,结果显示此方法是有效的,且恢复效果随信噪比的提高而改善．     

尿原体的研究进展

尿原体作为一类独特的微生物,从六十年代起在国外就有不少学者对其进行了系列研究进行了分类,但直到九十年代末才在国内医学界受到关注。大量研究表明尿原体与人及动物的呼吸道、泌尿生殖道以及新生儿的某些疾病密切相关。     

论短跑训练中的最大力量训练与快速力量训练

在短跑的力量训练中目前更多采用快速力量训练法,对最大力量训练法,由于存在认识上的差异,训练中选用较少。最大力量训练法是发展绝对力量和提高肌肉协调力最直接有效的方法。对短跑运动员来说合理运用最大力量训练法,在发展最大力量基础上进而发展快速力量和肌肉协调性,对提高短跑能力和运动成绩是一种经济实用的方法。     

双棱镜实验中衍射对干涉的影响

文中定性分析了用双光束作干涉实验时,由于菲涅尔直边衍射效应对双光干涉的影响。给出用双棱镜产生双光束时菲涅尔衍射现象对干涉影响的分析结果,指出了在此类实验中减少误差的方法     

Middle matching mining algorithm

1. Introduction With the increase in the amount of information, we feel the pressure from 搕he exploring information? and find that we are in a dilemma of having huge data but with little knowledge [1]. Data mining is an effective method to help us to get rid of the morass, and is a process of inferring knowledge from such huge data. A sequence is an ordered list of transactions (or itemsets), in which each transaction is a set of items. Typically there is a transaction-time associated with ea…     

高校图书馆的生态建设解析

随着社会的进步、科技的发展,人们对绿色生态环境的青睐程度越来越高,图书馆内部环境的设计则更关注读者对绿色的心理需求。本着“环保、生态、人文”的理念,打造“以人为本、全面、协调、可持续发展”的生态图书馆。本文从植物、光、色彩、人本关怀等方面阐述了图书馆的生态建设。     

Parallel computing for finite element structural analysis using conjugategradient method based on domain decomposition

1 Introduction Large and complex engineering problems often needmuch computation ti me and storage to run on ordinaryuniprocessor computers . Even if they can be solved ,powerful computation capability is required to obtainaccurate and reliable results within reasonable ti me .Parallel computing can meet requirements of high per-formance computing[1].Various types of parallel hard-ware architectures have been developed and parallelalgorithms adapted to these hardware architecturesproposed[2 ,3…     

Investigation on hot deformation behavior of AZ31 magnesium alloy

Magnesium and magnesium alloys, which have a density of 1.74 g cm-3, are the lightest structural metal. In addition to being extremely light, magnesium alloys have many advantages such as high specific strength and high specific rigidity [1-3]. Magnesium alloys have been paid more and more attention in recent years. A few die castings of magnesium alloys have been applied to automobile industry. Magnesium alloys have huge potentiality of application to automobile, motorcycle, aviation, spacefl…