Information System for Land-Use Planning and Management

In order to maintain the overall social interest in land use and improve the level of land administration, an information system for land-use planning and management (ISLUPM) was established, which is composed of presentation layer, business logic layer and data layer in the general structure. The application support platform of the ISLUPM, built based on COM, COM and .NET standard components, includes data engine, data management, assemblies, components management, operation management, and interface. Then, an elaboration was made on major functions of the ISLUPM, such as planning revision scheme, planning operation flow, digital processing, thematic analysis and inquiry, and preparation of the chart of reserved land resources. The developed system has been successfully applied to the land-use planning and management work of Longquanyi District, Chengdu, China. It may provide a reference for development of geographic information system (GIS) for land and resources.     

航线设计教学软件系统的研究与开发

本系统在ＷＩＮＤＯＷＳ９５环境下开发,以ＶＩＳＵＡＬ ＦＯＸＰＲＯ６．０为编程语言,软件系统不但具有航线设计教学指导、范例演示、航线设计评估功能;而且还具有实船应用、资料更新、系统数据维护功能。系统的界面友好,操作方便,具有多媒体效果。此外,本系统的数据保密性好,使用功能也可扩展。     

浅析成都主城区快速公交系统规划策略

随着大城市交通拥挤现象加剧及城市规模的日益扩大,居民对公共交通的需求与日俱增,公共交通发展潜力巨大。快速公交系统是介于城市轨道交通与常规公交之间的新型运营系统,是大容量车辆为运载工具的快速交通方式。本文针对成都交通所面临的问题,深入分析了快速公交系统的概念及优劣势以及国内外快速公交系统建设情况等;从城市公共交通特征出发。对成都主城区实施快速公交的优劣势以及可行性进行了研究．在现有道路资源的条件下探讨了成都主城区快速公交线网布局的规划原则、策略以及快速公交系统与城市轨道交通的衔接的三种发展模式。旨在进一步改善成都主城区快速公交系统的规划方法。     

基于BOD模式的慢行交通体系分析——以杭州为例

近年来,以自行车交通为主导的BOD开发模式在国内外得到广泛应用。许多国家和城市纷纷采取措施建设城市慢行交通体系,以缓解小汽车带来的交通压力。以杭州为例,阐述了以公共交通为骨架、自行车交通为主导的慢行交通体系构建理论,分析了该体系在杭州实施的现状与成功经验．同时指出现存问题与不足．并针对未来发展方向提出建议。     

加强国际总承包项目合同管理的探讨

在当今国际工程承包行业中,总承包合同逐渐成为工程发包的主流模式.总承包合同与单价合同有着本质的区别,如何做好总承包项目的合同管理,是当今国际总承包项目管理的一大重点和难题.结合大型国际总承包项目的项目管理工作实践,将心得与大家探讨.     

河北省高速公路绿色廊道规划设计策略思考

文章针对河北省高速公路绿色廊道建设要求,以京哈高速公路京秦段为例对河北省高速公路绿色廊道建设措施进行分析,提出分层景观、景观节点、生态系统、产业廊道与文化廊道的建设是当前高速公路廊道规划设计质量的重要关键性影响因素;同时,强调高速公路绿色廊道建设不应该只是简单的绿化,而是综合的高速公路品质的提质增效。     

高速公路网养护站点布局规划探讨

文章基于高速公路养护站点的职能与类型,分析了高速公路养护站点布局的影响因素,提出了高速公路养护站点布局规划的指导思想、规划原则和约束条件,为形成科学合理的高速公路网养护站点规划布局提供借鉴。     

森林公园慢行交通系统规划分析

文章基于森林公园慢行交通系统的构成及特点,从宏观、中观、微观三个层面分析了森林公园慢行交通系统的研究框架,并以鹿寨香桥岩森林公园为例,探讨了森林公园慢行交通系统的规划与构建内容。     

总布置设计对行人保护的重要影响

随着经济的迅速发展,我国已成为世界上重要的汽车生产和消费国之一。汽车迅速发展带来的后果是汽车安全事故的频发。为了有效地控制汽车事故中行人的伤亡率,文章介绍了欧盟强制法规的碰撞条件及评价分值,以约束汽车结构和性能,增加行人安全系数。分析了在前期总布置中设计对行人保护有作用的造型和结构。指出总布置工作对整车安全和行人安全起到了非常关键的作用,越来越受到各个厂家和消费群体的重视。     

Optimal multi-step toll design under general user heterogeneity

This paper studies the optimal multi-step toll design problem for the bottleneck model with general user heterogeneity. The design model is formulated as a mathematical program with equilibrium constraints (MPEC), which is NP-hard due to non-convexity in both the objective function and the feasible set. An analytical method is proposed to solve the MPEC by decomposing it into smaller and easier quadratic programs, each corresponding to a unique departure order of different user classes. The quadratic programs are defined on a polyhedral set, which makes it easier to identify a local optimum. Importantly, each quadratic program is constrained by a set of linear feasibility cuts that define the presence of each user class in the arrival window. We prove that the proposed method ensures global optimality provided that each quadratic program can be solved globally. To obviate enumerating all departure orders, a heuristic method is developed to navigate through the solution space by using the multipliers associated with the feasibility cuts. Numerical experiments are conducted on several small examples to validate the proposed methodology. These experiments show that the proposed heuristic method is effective in finding near-optimal solutions within a relatively small number of iterations.