大型溶腔岩溶发育隧道处理方案分析

通过对在建铁路某隧道所揭示溶腔结构处理与工程环境间的整体性、相关性及有序性分析，依照系统分析理论与方法，提出溶腔处理方案，对类似工程的溶腔处理有借鉴意义。同时，希望对于隧道工程建设要考虑工程结构本身及其赋存的环境间各个要素间的整体性、相关性和有序性．从而建设与环境和谐的隧道工程。     

城市轨道交通智能综合监控系统体系结构

智能综合监控系统具有全线各系统综合监控、不同工况下各系统联动、信息高度共享和系统自主决策等特征。从数据流和控制流角度出发,提出系统的3层体系架构,即综合决策层、车站决策层和现场控制层。综合决策层负责监控全线范围内的系统,制订全线的综合决策,并与外部系统进行数据和信息交互。中央级综合监控中心具有控制、报警和画面显示等等功能。车站决策层负责监控本站范围内的各监控子系统,并协调各子系统的联动功能,提供车站级的决策。车站级综合监控中心具有实时信息采集、维护监控和报警处理等功能。现场控制层分为面向服务类、运营类和安全类等3类系统,包括6个子系统。系统的关键部分是信息共享平台和网络通信平台。构建信息共享平台的关键技术包括:数据源接口、信息融合、数据挖掘和信息发布等技术。网络通信平台的关键技术主要是目前通用的SDH,ATM等标准通信技术。     

基于神经网络的炮兵火力计划评估与优选研究

为了解决炮兵火力计划选择的随意性和盲目性，建立了基于神经网络的方案评估与优选模型，确定了实施步骤，文章最后举例说明了模型在火力计划中的应用，进一步证明了其科学性和创新性，为炮兵火力计划评估与优选提供了一种定量和定性相结合的新方法。     

复兴号动车组超员报警设置及方案优化

对复兴号动车组超员报警的功能定义、实现方式进行了论述,并对复兴号动车组超员能力进行了分析。结合动车组实际运营中暴露的问题提出了优化解决方案。     

地铁车站环境温度自动控制系统分析与改进

提出了地铁车站公共区温度控制存在的问题,对问题原因进行了分析,并根据分析结果提出了地铁车站温度控制的新思路,设计了串级PID(比例-积分-微分)模糊控制的控制方案以及主要控制思路的实现方法。通过Matlab软件仿真验证了该方案的可行性。     

面向自组织平衡的共享电动汽车调度优化方法

针对共享电动汽车运营中出现的站点车辆供需不平衡及人工调度成本过高等问题，提出面向自组织平衡的共享电动汽车调度优化方法.利用共享电动汽车站点选择行为数据，构建用户取车站点选择MNL(Multinominal Logit)模型，分析用户的站点选择行为；构建面向各站点车辆供需自组织平衡的站点间车辆调度优化方法，即通过车辆动态折扣策略引导用户改变默认的最近取还车站点，在运营结束后以运营企业的调度总成本最小为目标，建立人工调度优化模型并应用禁忌搜索算法求解；最后，选取北京市海淀区部分共享电动汽车站点进行算例分析.结果表明：本文提出的优化方法与无动态折扣策略相比，调度总成本降低了 4.5%，人工调度成本降低了21.1%，人工调度任务数减少了8.3%.     

基于互联网地图数据的城市轨道交通规划方案公交可达性计算方法

传统基于网络分析的规划城市轨道交通方案公交可达性计算存在着数据获取难和分析时主观成分明显的问题。提出一种融合互联网地图数据和网络分析的计算方法,得到轨道交通规划方案对公交出行时间的影响。基于该方法,选取3个公交可达性评价指标,以芜湖市城市轨道交通规划方案为例,分析不同方案对公交可达性的影响,并探讨了该技术方法推广的可行性。     

Factors affecting electric vehicle sharing program participants’ attitudes about car ownership and program participation

There are growing concerns on traffic congestion, climate change and parking problems in major cities. Faced with these concerns, policy makers have sought sustainable transportation options including electric vehicle sharing programs (EVSPs). The city of Seoul with 10 million people also has recently launched an EVSP to provide citizens with an alternative travel mode. This study attempts to explore factors affecting the EVSP participants’ attitudes about car ownership and program participation. To do this, a web-based survey was conducted for the participants of the Seoul EVSP, asking their satisfaction levels for the components of the EVSP. Then, using 533 responses of 1772 EVSP members (a response rate of 30%), ordered probit models were developed for three types of attitudes: (1) willingness to dispose of a car, (2) willingness to purchase an EV and (3) willingness to continue participating in the EVSP. The estimated models suggested that participants’ social and economic perspectives were the most important factors affecting the participants’ attitudes. In addition, the attitudes varied depending on personal characteristics such as gender, age and income. Although this study was conducted in the early stage of an EVSP, its results are expected to provide insights into a better EVSP design.     

大学英语教师隐性知识共享激励机制研究

大学英语教师隐性知识的共享,对提高学校整体英语教学、科研水平具有重要意义。本文在分析大学英语教师隐性知识共享的内涵及作用的基础上,对影响大学英语教师隐性知识共享的障碍进行了梳理,并主要提出了激励大学英语教师隐性知识共享的措施。     

Analytical and grid-free solutions to the Lighthill-Whitham-Richards traffic flow model

In this article, we propose a computational method for solving the Lighthill-Whitham-Richards (LWR) partial differential equation (PDE) semi-analytically for arbitrary piecewise-constant initial and boundary conditions, and for arbitrary concave fundamental diagrams. With these assumptions, we show that the solution to the LWR PDE at any location and time can be computed exactly and semi-analytically for a very low computational cost using the cumulative number of vehicles formulation of the problem. We implement the proposed computational method on a representative traffic flow scenario to illustrate the exactness of the analytical solution. We also show that the proposed scheme can handle more complex scenarios including traffic lights or moving bottlenecks. The computational cost of the method is very favorable, and is compared with existing algorithms. A toolbox implementation available for public download is briefly described, and posted at http://traffic.berkeley.edu/project/downloads/lwrsolver.