A management scheme for improving transportation efficiency and contributing to the enhancement of the social fabric

The continuously increasing need for mobility has brought about not only significant facilities in several aspects of human initiative, but also growing traffic congestions, a phenomenon that leads to unpleasant everyday situations at a short time level, but in the long run also to the degradation of the level of quality of living in large cities and the alienation between people. The management of traffic stands, thus, as a fundamental prerequisite for confronting those issues, enhancing transportation and improving the social fabric. This paper considers the concept of car pooling as a structured approach to this problem, by specifying, developing and validating a mobile-community-driven system for collaborative transportation, namely the “transportation management-car pooling system”. This system is capable of proposing optimal, reliable and secure community matches (taking into consideration personality features, talking interests, driving style, etc.), based on user profile and context information. The paper describes the transportation management-car pooling system, presenting its input parameters, decision making process and outcomes. Finally, indicative simulation results showcase its effectiveness.     

An area-level model of vehicle-pedestrian injury collisions with implications for land use and transportation planning

There is growing awareness among urban planning, public health, and transportation professionals that design decisions and investments that promote walking can be beneficial for human and ecological health. Planners need practical tools to consider the impact of development on pedestrian safety, a key requirement for the promotion of walking. Simple bivariate models have been used to predict changes in vehicle-pedestrian injury collisions based on changes in traffic volume. We describe the development of a multivariate, area-level regression model of vehicle-pedestrian injury collisions based on environmental and population data in 176 San Francisco, California census tracts. Predictor variables examined included street, land use, and population characteristics, including commute behaviors. The final model explained approximately 72% of the systematic variation in census-tract vehicle-pedestrian injury collisions and included measures of traffic volume, arterial streets without transit, land area, proportion of land area zoned for neighborhood commercial and residential-neighborhood commercial uses, employee and resident populations, proportion of people living in poverty and proportion aged 65 and older. We have begun to apply this model to predict area-level change in vehicle-pedestrian injury collisions associated with land use development and transportation planning decisions.     

认真做好爱护车辆工作确保运输安全

叙述了做好爱护车辆工作的体会、做法并阐述了其重要性，旨在提高车辆的运行质量和运输效益。     

Solving continuous location–districting problems with Voronoi diagrams

Facility location problems are frequent in OR literature. In districting problems, on the other hand, the aim is to partition a territory into smaller units, called districts or zones, while an objective function is optimized and some constraints are satisfied, such as balance, contiguity, and compactness. Although many location and districting problems have been treated by assuming the region previously partitioned into a large number of elemental areas and further aggregating these units into districts with the aid of a mathematical programming model, continuous approximation, on the other hand, is based on the spatial density of demand, rather than on precise information on every elementary unit. Voronoi diagrams can be successfully used in association with continuous approximation models to solve location–districting problems, specially transportation and logistics applications. We discuss in the paper the context in which approximation algorithms can be used to solve this kind of problem.     

抓住基本特征的大型商业建筑快速设计--北京昌平京粮广场创作体会

本文以京粮广场的快速设计为例，分析了大型商业建筑的交通组织、公共空间及形态特征，指出建筑师只有善于抓住设计对象的主要特征、关键性问题，才能快速提出初步方案。     

试论矿井运输如何挖潜改造提高运力再上档次

矿井运输系统的现代化改造滞后于生产系统的现代化改造,也就是说运输与采掘相比有着相当大的差距,已成为制约矿井安全生产的一个重要问题.为此.矿井应根据自身情况改善运输环境,解决矿井运输存在的实际问题.增加运输方面的装备,使矿井的运输系统真正上个台阶,以适应现代化生产的需要.     

GPRS技术在供水管网监测系统中的应用研究

一种基于GPRS技术的供水管网监测系统解决方案。方案通过GPRS网络实现供水管网测点数据的传输,降低了系统成本,解决了数据传输的不稳定性导致的数据丢失或延时问题。     

浅谈液化气埋地管道阀井的设置

对居民区管道燃气输送过程中,中压及中压以上的液化石油气管线如何设置控制阀,以及设置方式、位置等进行了论述。     

产品包装物流运输中心优化选址的技术经济研究

运用鲍姆尔－沃尔夫模型定量研究企业产品包装物流运输中心的优化问题,缩短运输距离,减少企业产品包装在物流运输中的消耗损失费用,提高企业产品包装物流运输中心效益,优化企业产品包装物流运输费用和过程。其结果对现代企业提高产品包装物流动输效益有重要的决策参考价值和指导意义。     

浅谈液化天然气系统

简介了液化天然气的生产流程、运输工具以及液化天然气站的各组成设备 ,还较详细地介绍了给液化天然气汽车加气的有关设备