基于免疫和模糊模式识别的检测器生成模型

分析了在检测器生成过程中引入模糊模式识别的原因,提出了一种基于免疫原理和模糊模式识别的检测器生成模型,该模型的核心算法是基于隶属度的检测器选择算法.详细描述了该算法的算法流程和检测器对非我抗原集合隶属度的计算算法,并简述了初始检测器生成算法和分层检测策略.设计了仿真试验,并将实验结果同传统方法进行了比较,详述了仿真实验中各个参数选择的依据和理由,试验结果表明新模型呈现较高的检测率和低的误检率.     

基于双Kohonen神经网络的Web用户访问模式挖掘算法

本文根据Kohonen自组织特征映射神经网络中学习阶段的性质,运用双Kohonen神经网络组合成新的自组织训练挖掘模型,先使用粗调整训练,加快模型学习速度,紧接着使用微调整训练,提高模型学习精度。实验结果表明,本文提出的双Kohonen神经网络挖掘模型,相对于标准Kohonen神经网络在训练速度和收敛效果上都有一定程度的提高,改善了聚类效果,为挖掘用户的多种兴趣提供了一种可行的方法。     

A method for diagnosis of current faults in antenna arrays using neural networks

A method for detection of faulty elements in antenna arrays from far‐field radiation pattern is presented. The proposed technique finds variation of current from correct values in the faulty elements. A step wise approach is proposed to determine magnitude and phase of current excitation and location of faulty element using neural networks. The results with radial basis function neural network and probabilistic neural network are compared. © 2008 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.     

Independence of Containing Patterns Property and Its Application in Tree Pattern Query Rewriting Using Views

We show that several classes of tree patterns observe the independence of containing patterns property, that is, if a pattern is contained in the union of several patterns, then it is contained in one of them. We apply this property to two related problems on tree pattern rewriting using views. First, given view V and query Q, is it possible for Q to have an equivalent rewriting using V which is the union of two or more tree patterns, but not an equivalent rewriting which is a single pattern? This problem is of both theoretical and practical importance because, if the answer is no, then, to find an equivalent rewriting of a tree pattern using a view, we should use more efficient methods, such as the polynomial time algorithm of Xu and Özsoyoglu (2005), rather than try to find the union of all contained rewritings (which takes exponential time in the worst case) and test its equivalence to Q. Second, given a set S of views, we want to know under what conditions a subset S′ of S is redundant in the sense that for any query Q, the contained rewritings of Q using the views in S′ are contained in those using the views in S???S′. Solving this problem can help us to, for example, choose the minimum number of views to be cached, or better design the virtual schema in a mediated data integration system, or avoid repeated calculation in query optimization. For the first problem, we identify several classes of tree patterns for which the equivalent rewriting can be expressed as a single tree pattern. For the second problem, we present necessary and sufficient conditions for S′ to be redundant with respect to some classes of tree patterns. For both problems we consider extension to cases where there are rewritings using the intersection of multiple views and/or where a schema graph is present.     

大学计算机基础教学模式改革的研究与实践

本文分析了大学计算机基础课程教学模式改革的意义,提出了以多模块教学内容为载体,以网络教学为平台,以第二课堂实践教学为基地的立体教学模式。     

一般院校信息与计算科学专业人才培养模式研究

文章通过对信息与计算科学专业与计算机科学专业进行比较分析,提出了信息与计算科学专业的改革思想与培养方案,制定相应的理论教学课程体系和实践教学体系。本文的研究成果,将对一般高等院校信息与计算科学专业建设及其课程建设,具有一定的指导意义。     

软件工程综合性课程设计的教学实践

综合性课程设计能有效地激发学生的学习兴趣,提高学生的动手能力,促进其综合素质的全面发展。本文阐述了开展软件工程综合性课程设计的必要性,给出了课程设计的组织方式、考核与评价方法;并且通过教学实践,提出了课程设计的创新模式。     

东西方怪诞图案的起源探究

怪诞图案存在于装饰艺术的范畴里,在古代曾经几乎是装饰图案的主要内容。在近代渐渐衰落,现在最多的用途是网络游戏中的游戏原型设计。这篇论文主要探讨怪诞图案的起源,发展变化过程,以及近代衰落的原因。     

大学校园标识系统分析

本文从现代大学校园功能由传统单纯的教学场所发展到集教学、学术交流、生活、旅游、休闲等功能日益复杂的社区的变化为基础,尝试把校园环境标识系统不仅作为校园视觉形象设计系统的一部分,还与认知心理学理论相结合,从总平面图到心理认知路线,阐述了大学校园内环境标识系统变化的理论依据,并为其发展指出了方向。     

基于Struts的Web开发

Struts是目前比较流行的一个基于MVC设计模式的JavaWeb应用框架,文章详细地阐述了Struts框架实现MVC的构架机制及其核心组件和框架特点,介绍了集成在Struts框架内部的Validator框架在具体Web系统中的开发应用,比较了基于该验证框架的两种验证的优缺点。