采用改进遗传算法的变压器优化设计

电力机车变压器的优化设计,采用遗传算法是比较好的选择,但传统遗传算法存在一些弊端,文章从编码方式、遗传操作等几个方面探讨了如何对其进行改进,并使用Visual C++编写了一套设计软件,实践证明这种改进是有效的。     

广东省现代物流的供需匹配研究

广东省现代物流正处于快速增长的阶段，如何协调物流供给与需求的矛盾，是现代物流发展过程中不可避免的问题。本文从物流的需求和供给的状况着手，分析了广东省现代物流存在供需不平衡问题的原因与表象，对匹配广东省现代物流的需求与供给提出了几条建议。     

Memory recall errors in retrospective surveys: A reverse record check study

This paper reports on a study to compare self-reports during an interview with staff who attended a University health centre in Turkey, with the records of visits to the same health centre over the previous 12 months. Design of the study reflects the effects of importance of the event, duration since the event, frequency of the occurrence of the event, measurement scale of the event, and bounded and unbounded recalling. In order to assess the extent of recall error, responses to retrospective questions on health centre visits are compared with administrative records. Statistical models are proposed for short and long term human memory recall error effects on responses.     

基于遗传算法的军用集装箱装载优化

以军用集装箱装载为研究对象，在考虑实际应用中的一些约束条件下，构造了军用物资的装载优化模型，提出了一种军用集装箱三维装载的遗传算法。该算法考虑了货物放置方向、装载客积、装载质量及装载重心等约束条件。最后对一个案例进行了计算，验证了该模型的有效性，并且利用3ds max得到了装载方案的三维图。     

语义单位关系理论及其作用

Hoey将语义单位关系定为人们根据相邻句子或句群选择语法、词汇和语调来生成句子或句群的认识过 程,并将它分为两大类:逻辑顺序关系和匹配关系。而实现这些关系最常见的途径是标识手段,最基本的语篇模式为 问题解决模式,匹配模式和一般具体模式。     

基于遗传算法的核函数参数优化

核主分量分析是一种输入输出特征非线性变换技术。选择最优或接近最优的非线性变换核函数参数,使类的可分性测度最大,是KPCA应用于特征提取的关键。本文采用高斯变异遗传算法作优化技术,实现了KPCA和GA的集成,适合核函数参数的优化选择。仿真表明,该技术可行、有效。     

建立绿色会计核算体系初探

目前我国正处在经济高速增长期。年GDP增长率9％-11％，同时又造成了严重的环境污染，土地大规模沙化，空气质量下降，长江、黄河等七大水系都遭受到了前所未有的污染。因此，对环境破坏进行成因分析，建立绿色会计体系，计价、计量自然环境。才能达到遏制环境污染的目的。     

基于GASA算法的提前或拖期问题优化

针对企业生产的提前 /拖期问题,提出了提前 /拖期问题的数学模型,在此基础上,利用GASA混合优化策略优化之,既保留了传统遗传算法能很快达到最优值领域的优点,又通过结合模拟退火算法大大改善传统遗传算法在后期的收敛性。     

Core structure and comparative statics in a hybrid matching market

Flexible firms compete by means of wages in the Assignment market while rigid firms have no flexibility over terms of appointment in the Marriage market. Workers trade with both kinds of firms in the hybrid market.Examples show that standard results that characterize the core of the Marriage market (respectively, Assignment market) are not robust to the entrance of flexible (respectively, rigid) firms to this market. A new algebraic structure provides a different characterization for the core of the hybrid model and reflects a sort of robustness to the exit of rigid (respectively, flexible) firms from this market. Meaningful comparative static results are derived.