The Evolution of Elliptic Flow Under First Order Phase Transition

Elliptic flow for non-central Au+Au collisions at s NN =200 GeV is investigated with a 2+1 dimensional hydrodynamic model.We analyze the softening effect by the velocity along the axis.The contribution of the elliptic flow from the QGP phase,mixed phase and hadron gas phase is studied.The relation between the sound horizon and evolution of the elliptic flow is discussed.     

输油管线泄漏监测方案研究

检测技术在公安、消防、开采领域有着广泛的应用前景。本技术方案使用流量、温度补偿、负压波法的方式检测管线泄漏。本文论述了输油管线泄漏检测技术的发展现状、探讨常用输油管线泄漏检测技术的特点。     

New Method of Road Surface Identification in Anti-Lock Braking System

Based on the vehicle-road dynamic model, the road characteristic parameter, which depends on different types of road surfaces, is introduced and a new method of road surface identification for automotive anti-lock braking system (ABS) is proposed. According to the characteristics of vehicle-road dynamic model, a simple math resolution method of the model‘s factors is established. Only using the information of wheel speed, the vehicle reference velocity and the wheel slip ratio are estimated real-timely. And based on the wheel dynamic model, the road characteristic parameter is determined to identify the road surface for the determination of thresholds of ABS regulative parameters. With this new method, the road surface identification can be accurately obtained and calculation time is short that it can meet the ABS real time control need, and it also improves the performance of ABS.     

汽车计算平台工程国外相关标准概述

结合我国汽车计算平台工程,分析了国外相关的标准现状和基本框架,并为今后工作的开展提出了建议.     

一种基于偏离度的移动导航服务回归测试优先方法

随着现代移动导航服务的智能化发展,导航服务算法日益复杂,对其测试验证更为困难。探索基于偏离度的移动导航服务回归测试优先方法。该方法假设如果用户实际行驶路线偏离导航推荐路线,则可能存在移动导航服务故障。通过分析海量移动导航日志,比较导航服务推荐路径与用户行驶路径,识别导航区域和交叉点的偏离度,然后基于偏离度优先选择回归测试数据,帮助提高测试效率和质量。     

新型一体化氧化沟工艺及其运行方式的探讨

以四川省城市污水处理示范工程———四川省新都污水处理厂为例 ,介绍了一体化氧化沟的工艺特色 ,重点探讨了连续流间歇曝气的运行方式和运行管理经验。     

MIOD工艺及其运行方式研究

M IOD工艺是在一体化氧化沟的基础上发展起来的一种新型污水处理工艺。在分析该工艺特点的基础上,进行了间歇曝气与连续曝气的除污效果对比研究。结果表明:M IOD工艺处理效果好、运行稳定;曝气2 h、停曝2 h运行方式的除污效果优于连续曝气的除污效果,且具有很高的脱氮除磷效率。     

汽车自适应巡航控制系统的发展

详细叙述了汽车自适应巡航控制系统ACC的组成、工作原理、所需要的关键技术和存在的问题.介绍了近年来该系统在国内外所取得的成果,对ACC系统的未来发展进行了预测.     

网络技术在汽车电控系统中的应用

介绍了汽车电子控制技术的发展和现状以及网络技术，如总线技术、短距离无线通信技术在目前汽车电子控制系统中的应用和发展方向，并对目前应用比较广泛的几种协议进行了比较，提出了汽车电控系统网络化的优点。