从查询式到事件驱动的软件接口开发技术

通过对一款电话语音卡软件接口的分析，利用windows操作系统中对多线程程序设计提供的相关支持，提供了在查询式软件接口上开发基于事件驱动模型的软件接口的方法。采用提供的方法可以使用户的应用软件的设计变得较为简单。     

单线铁路平行运行图区间通过能力的整数规划法

本文通过分析，建立了单线铁路成对非追踪平行运行图区间通过能力的整数规划模型，分析了模型的基本性质，提出了模型的解法。     

基于遗传规划的发动机燃烧系统故障诊断

探讨了利用遗传规划自动生成有效诊断特征参数的方法 ,弥补了故障诊断知识的不足 ,从而使该系统具有自学习能力 ,提高了诊断的效率和精度。     

技术直达列车编组计划的阶跃函数模型及同构变换

本文构造了技术直达列车编组计划（ＴＦＰ）问题的阶跃函数模型。通过对该模型做同构变换，获得了该问题的几种典型优化模型形式：线性０－１规划模型，目标函数为线性而约束条件是二次的０－１规划模型。从而为引进各种特定的算法提供了条件。文末以五个支点站为例给出了各种模型的具体形式。     

连续消耗应急物资调运问题研究

以多出救点、单应急点的连续消耗应急物资调运问题为研究对象,考虑应急物资调运具有时间效率重于经济效益的特点,以及应急系统的整体可靠性及费用,以物资参与救援开始时间最早为第一目标,以出救点数目最少为第二目标,建立了相应的多目标优化决策模型。在满足物资参与救援开始时间最早的基础上,给出了出救点数目优化过程的3个判断条件,并设计了简单的求解算法,最后通过算例验证了模型及算法的有效性。     

A network enhancement model with integrated lane reorganization and traffic control strategies

Lane reorganization strategies such as lane reversal, one‐way street, turning restriction, and cross elimination have demonstrated their effectiveness in enhancing transportation network capacity. However, how to select the most appropriate combination of those strategies in a network remains challenging to transportation professionals considering the complex interactions among those strategies and their impacts on conventional traffic control components. This article contributes to developing a mathematical model for a traffic equilibrium network, in which optimization of lane reorganization and traffic control strategies are integrated in a unified framework. The model features a bi‐level structure with the upper‐level model describing the decision of the transportation authorities for maximizing the network capacity. A variational inequality (VI) formulation of the user equilibrium (UE) behavior in choosing routes in response to various strategies is developed in the lower level. A genetic algorithm (GA) based heuristic is used to yield meta‐optimal solutions to the model. Results from extensive numerical analyses reveal the promising property of the proposed model in enhancing network capacity and reducing congestion. Copyright © 2016 John Wiley & Sons, Ltd.     

Strategic evacuation planning with pedestrian guidance and bus routing: a mixed integer programming model and heuristic solution

This paper presents a mathematical model to plan emergencies in a densely populated urban zone where a certain numbers of pedestrians depend on transit for evacuation. The proposed model features an integrated operational framework, which simultaneously guides evacuees through urban streets and crosswalks (referred to as “the pedestrian network”) to designated pickup points (e.g., bus stops), and routes a fleet of buses at different depots to those pick‐up points and transports evacuees to their destinations or safe places. In this level, the buses are routed through the so‐called “vehicular network.” An integrated mixed integer linear program that can effectively take into account the interactions between the aforementioned two networks is formulated to find the maximal evacuation efficiency in two networks. Because the large instances of the proposed model are mathematically difficult to solve to optimality, a two‐stage heuristic is developed to solve larger instances of the model. Results from hundreds of numerical examples analysis indicate that proposed heuristic works well in providing (near) optimal or feasibly good solutions for medium‐scale to large‐scale instances that may arise in real transit‐based evacuation situations in a much shorter amount of computational time compared with cplex (can find optimal/feasible solutions for only five instances within 3 hours of running). Copyright © 2016 John Wiley & Sons, Ltd.     

区域铁路网趋稳规模测算方法

以区域铁路客货运输量为中间载体,将区域铁路网规模测算问题划分为2阶段,分别建立数学规划模型进行求解,即第1阶段考虑区域经济发展、运输需求、服务人口数量和产业需求等因素,确定区域经济发展稳定状态下的合理区域铁路客货运量,在此基础上,进一步考虑国土系数、线路展开系数等因素,分析铁路客货运量与合理区域铁路网规模的内在联系和规律,从而最终确定适配的区域铁路网趋稳规模。以长江中下游地区为例进行实证分析,通过区域铁路发展特征对模型参数进行合理标定后计算,发现其所需区域铁路网总体规模为60 366 km,而目前区域内铁路网规模仅为22 642 km,不满足率高达62.49%,因此,急需加快该区域内的铁路网建设以保障和促进该区域社会经济的健康快速发展。     

最优发电企业数量与规模的二层规划模型

建立一个二层规划模型来研究企业数量与企业规模的关系.上层决策者(社会管制者)以社会平均成本最小化和社会平均效益最大化为目标选择发电企业的数量使得社会资源得到良好的配置,而下层决策者(发电企业)选择规模使其利润最大化.根据模型的结果分析了社会管制者对社会平均成本最小化和社会平均利润最大化的不同偏好对结果的影响.     

一种基于动态规划的课程调度算法的研究与实现

在分析排课问题和研究相关算法的基础上，提出了一种基于动态规划和优先级算法的新课程调度算法PCA．根据时间、教室、教师和班级的约束关系，进行等价类划分，依据所设定的优先级次序进行一次性扫描排课，尽量回避对冲突的调整工作，并在此基础上实现了一个课程调度系统，既适应学分制排课要求或满足教师提出较苛刻的上课条件要求，也能在几分钟内做出排课计划．2年的使用实践表明了该系统的有效性和相关算法的高效性．