由汽车制动印痕推算车速的方法及其在处理交通事故中的应用

交警在处理交通事故时依据汽车的制动印痕来判定车辆肇事时的速度 ,是分析事故原因、认定事故责任的一个重要依据。

Application of cluster analysis and stepwise regression in predicting the traffic volume of lanes

Because of the difficulty to obtain the traffic flow information of lanes at non-detector intersections in most metropolises of the world,based on the relationships between the lanes of signal-controlled intersections,cluster analysis and stepwise regression are integrated to predict the traffic volume of lanes at non-detector isolated controlled intersections.First cluster analysis is used to cluster the lanes of non-detector isolated signal-controlled intersections and the lanes of all signal-controlled intersections with detectors.Then, by the results of cluster analysis,the traffic volume samples are selected randomly and stepwise regression is used to predict the traffic volume of lanes at non-detector isolated signal-controlled intersections.The method is tested by the traffic volume data of lanes of the road network of Nanjing city.The problem of predicting the traffic volume of lanes at non-detector isolated signal-controlled intersections was resolved and can be widely used in urban traffic flow guidance and urban traffic control in cities without enough intersections equipped with detectors.

浅谈网络通信中信息安全的保障策略

在目前的信息化时代,计算机互联网技术正在不断的发展和成熟,作为信息的主要传播交换方式之一,网络通信技术在目前的生活工作当中得到了广泛的应用,在这样的过程中,信息安全则是网络通信技术中的关键,目前在网络通信当中,大量病毒和黑客的存在,对网络信息的安全性提出了较大的挑战。针对这样的情况,需要对网络通信中所存在的主要安全问题进行分析,并且有针对性的采取相关解决方案,以此来保证网络通信的信息安全。本文对网络通信中信息安全的保障策略进行分析。

单位局域网网络安全解析

现阶段,计算机网络技术广泛应用到各单位的生产活动中,极大程度的提升了工作效率,为单位带来了更加理想的经济利益。但是,也必须正确看待网络安全问题。单位局域网络的安全问题,不仅仅是技术方面的问题,同时也是安全管理方面的缺陷,针对单位局域网络的安全性能研究,极具现实性意义。