车辆路径问题的改进遗传算法研究

分析了车辆路径问题的研究方法和遗传算法的特点,提出了一种改进的遗传算法求解车辆路径问题.在算法的求解过程中,构造了一种新的编码方式,能够显著减少编码长度.通过保留每代最佳的若干染色体以及引入期望繁殖率的概念,本算法可以实现解的多样性,避免收敛于局部最优解,同时可以有效的防止在进化的过程中失去最优解的可能性.实验结果表明,本算法可以快速求得优化解,是求解车辆路径问题的一种有效算法.

数控设备的网络管理

研究将数控设备通过网络管理,系统总体设计结构分为两层,底层是通过客户机同各自管理着的多台数控设备进行通信,上层是通过服务器实现与多台客户机的数据通讯,从而达到通过网络管理数控设备的目的.本文主要研究上层控制,即实现服务器与客户机之间的通讯,利用套接字网络接口,通过自定义协议与Windows的自定义消息,完成了一台服务器与多个客户机的并行通信,实现数控加工文件的传输与控制.

Principal Component-Discrimination Model and Its Application

Having researched for many years, seismologists in China presented about 80 earthquake prediction factors which reflected omen information of earthquake. How to concentrate the information that the 80 earthquake prediction factors have and how to choose the main factors to predict earthquakes precisely have become one of the topics in seismology. The model of principal component-discrimination consists of principal component analysis, correlation analysis, weighted method of principal factor coefficients and Mahalanobis distance discrimination analysis. This model combines the method of maximization earthquake prediction factor information with the weighted method of principal factor coefficients and correlation analysis to choose earthquake prediction variables, applying Mahalanobis distance discrimination to establishing earthquake prediction discrimination model. This model was applied to analyzing the earthquake data of Northern China area and obtained good prediction results.