Analysis of opposing left-turn conflicts based on traffic conflict technology

The relationship between the opposing left-turn conflict and the traffic participants was analyzed in this study. Based on the traffic conflict technology, the image data were collected in a real traffic situation. The relationship was investigated under two different conditions. The number of opposing left-turn conflicts was positively correlated with the number of left-turn vehicles while the ratio of left-turn vehicles to opposing vehicles was less than 1, and showed a positive correlation with the number of opposing-through vehicles when the ratio of left-turn vehicles to opposing vehicles was more than 1. In other words, the opposing left-turn risk was positively correlated with the number of the minor traffic participants, which had a negative effect on the whole traffic system operation.     

分散型控制系统应用中资源分配的若干问题

着重解释了分散型控制系统在实际应用中，对系统软，硬件资源的分类及分配应给予重视的原因，以及详细介绍了点的多样性，点的类型归纳排序，最小剩余量，控制点同一性等资源分配的原则。     

应用HS2000改进风机的控制方案

应用HS2000分布式控制系统丰富的软件功能，根据工艺特性，设计了一套软件程序，它可依据水温的不同，选择风机的开、停及变频的工作状态，并且对风机实现监控和保护。     

多台风机变频—工频切换控制的实现

文章介绍了由ＨＳ２０００分散控制系统与三菱变频调速器Ａ２４０相配套作为控制核心，针对工艺特性设计了一套根据水温的不同，用一台变频调速器依次调节三台风机的软、硬件控制系统，从而实现了循环冷水温度的稳定控制。     

Model of desired speed based on vehicle dynamic

The desired speed will help the drivers control their driver behavior that could directly influences the traffic safety.This paper presents a basic definition of a driver’s desired speed,and analyzes the effects of road geometer parameter,driver behavior and vehicle performance on the desired speed.By setting the familiar horizontal curve as the research environment,the generating process of the desired speed was described.Then,combined with the desired trajectory,the effect of driver’s identification of vehicle dynamic on the desired speed was highlighted.Based on the vehicle dynamic theory,a desired speed model that consisted of the desired trajectory,the driver’s experience and vehicle parameter was established and numerically analyzed.