Unusual event detection and prediction in real-life scenes

In this paper,we consider unusual event detection problem in a novel viewpoint and provide an algorithm to solve the problem.The actions or events in the scene is usual or not will eventually be reflected on the changes of some basic features.We summarize these basic event features and propose special representation for each of them.Thus we can model these features in a uniform mode using adaptive Gaussian mixture model.Supervised and unsupervised unusual event detection algorithm can be designed to fit var...     

出口集装箱堆场位置的优化

出口集装箱堆场位置的确定是集装箱堆场管理中的重要环节,其对缩短集装箱船在港停留时间,提高集装箱码头作业效率有着重要的意义。提出了一种优化出口集装箱堆场位置的启发式优化算法,模拟试验表明该算法能够在保证装船质量的同时,有效提高集装箱码头装船效率。     

基于几何距离准则拟合铁路线路参数的研究

随着高速铁路迅猛发展,车轮的冲击以及外界条件对铁路线路影响加大,从而使铁路线路与原设计的偏差较大,并且呈现一种不规律的现象.本文研究基于稳定估计的几何距离准则拟合线路参数的方法.用新拟合出的线路参数指导铁路线路养护作业,可使线路整正的工作量最小.     

管线综合工程设计工作总结

该文对两个较复杂的管线综合工程通过比较,作出结论,可供相关专业人员参考。     

Walking Time Modeling on Transfer Pedestrians in Subway Passages

Survey and determination of the passengers' walking time in subway passages is the basic work to realize train coordination between lines and to reduce the passengers' waiting time in transferring. The paper focuses on the passengers' walking time on transfer pedestrians from the statistical point of view. First, sampling method is designed based on the analysis of factors affecting walking time and five transfer stations along Line No. 5 of Beijing subway is selected to conduct the sampling survey following the method. Then, it is shown by analyzing the data collected in the transfer passage from Line No. 5 to Line No. 1 at Dongdan station, that the probabilities of walking time of passengers follow Log-normal distribution and its expected value and standard deviation are affected remarkably by crowding. Next, equivalent distance of transferring is conceived considering the real distance of passage and different affections of facilities equipped along. Finally, regression analysis of data from 10 transferring passages shows that the expected value of passenger walking time is quadric to the equivalent distance of passage.     

城市轨道交通工程折返线的防护距离分析

根据国际IEEE标准中有关安全制动模块的定义,基于车辆、信号等相关技术参数,对城市轨道交通工程中折返线安全防护距离进行了分析计算。     

Ship Size and Service Configuration in Container Shipping

This study analyzes the effect of ship size on the liner service configuration by establishing an economic model.The service configuration is characterized by the distance of service and the number of calling ports.A study case is presented for illustration.At last such a conclusion is drawn that given a fixed profit,the ship size will change with the extension of service in the same direction,while the change rate of ship size is a little higher than that of the extension of service.     

快速查找初始聚类中心的K_means算法

传统的k_means算法对初始聚类中心十分敏感,聚类结果随不同的初始输入而波动,容易陷入局部最优.为消除这种敏感性,针对k_means算法,提出了一种新的基于数据样本分布选取初始聚类中心的方法,对公共数据库UCI里面的数据实验表明改进后的k_means算法能产生质量较高的聚类结果,并且消除了对初始输入的敏感性.     

一种考虑分类的石材图像相似性比对算法

在基于颜色的图像相似比较中,传统的处理方法大多采用各子空间的概率作为特征,在此基础上定义图像的距离和相似度.但这些方法可能导致色彩比对失真的情况出现;在同一类的石材中颜色和纹理有很大的差异,甚至会出现两张分属异类的石材图像在单纯从颜色、纹理等特征上进行判断比同类很多石材图像更为"相似".文中引入了先对石材的样本图像进行分类,定义图像与各大类的相似度.在类内定义较为一般性的相似度.综合二者给出图像的整体相似度定义,实验表明该方法具有较好的分类效果和较合理的石材图像相似度.     

基于广义出行费用的城市综合交通方式优势出行距离研究

为研究城市综合交通网络结构,帮助决策者合理配置城市交通资源,本文研究了城市综合交通网络中基于广义出行费用的各交通方式优势出行距离概率密度曲线.分析居民出行的广义出行费用(即交通方式的服务水平,包括出行时间和票价等)可以确定城市中常见交通方式出行所需的平均花费水平,从而构建出同一出行网络中不同交通方式优势出行距离的概率密度曲线,对概率密度曲线进行分析和拟合可以得到固定形式的基于广义出行费用的城市综合交通方式优势出行距离概率密度模型.最后,以南京市为例进行实证分析.