Automotive storage of hydrogen in alane

Although alane (AlH₃) has many interesting properties as a hydrogen storage material, it cannot be regenerated on-board a vehicle. One way of overcoming this limitation is to formulate an alane slurry that can be easily loaded into a fuel tank and removed for off-board regeneration. In this paper, we analyze the performance of an on-board hydrogen storage system that uses alane slurry as the hydrogen carrier. A model for the on-board storage system was developed to analyze the AlH₃ decomposition kinetics, heat transfer requirements, stability, startup energy and time, H₂ buffer requirements, storage efficiency, and hydrogen storage capacities. The results from the model indicate that reactor temperatures higher than 200 °C are needed to decompose alane at reasonable liquid hourly space velocities, i.e., > 60 h⁻¹. At the system level, a gravimetric capacity of 4.2 wt% usable hydrogen and a volumetric capacity of 50 g H₂/L may be achievable with a 70% solids slurry. Under optimum conditions, 80% of the H₂ stored in the slurry may be available for the fuel cell engine. The model indicates that H₂ loss is limited by the decomposition kinetics rather than by the rate of heat transfer from the ambient to the slurry tank.     

Batteries: Lower cost than gasoline?

We compare the lifecycle costs of an electric car to a similar gasoline-powered vehicle under different scenarios of required driving range and cost of gasoline. An electric car is cost competitive for a significant portion of the scenarios: for cars of lower range and for higher gasoline prices. Electric cars with ∼150 km range are a technologically viable, cost competitive, high performance, high efficiency alternative that can presently suit the vast majority of consumers’ needs.     

论我院交通运输(汽车运用工程)专业的定位与课程体系

依据国家教育部1998年颁布的《普通高等学校本科专业目录》以及市场对汽车运用工程人才规格要求的变化和数量需求状况,讨论了汽车运用工程（方向）的专业归属,提出了交通运输（汽车运用工程）专业的定位（培养目标确定）和课程体系设置的具体意见。     

多功能高密度鲜活水产品储运装置的研究

分析了鲜活水产品长途储运的发展现状,阐述了多功能高密度鲜活水产品,储运装置的基本原理和结构组成,介绍了用常规检测装置和智能调控表组成的控制系统,对载鱼仓水体生态环境的自动监控,并通过实验进行了验证。     

Designing an intelligent ontological system for traffic light control in isolated intersections

This paper models the traffic light control domain using a fuzzy ontology and applies it to control isolated intersections. Proposing an independent module for reusing traffic light control knowledge is one of the most important purposes of this paper. In this way, software independency increases and other software development activities, such as test and maintenance, are facilitated. The ontology has been developed manually and evaluated by experts. Moreover, the traffic data is extracted and classified from images of intersections using image processing algorithms and artificial neural networks. According to predefined XML schema, this information is transformed to XML instances and mapped onto the fuzzy ontology for firing suitable fuzzy rules using a fuzzy inference engine. The performance of the proposed system is compared with other similar approaches. The comparison shows that it has a much lower average delayed time for each car in each cycle in all traffic conditions as compared with the other ones.     

A branch and bound algorithm for the travelling salesman and the transportation routing problems

In this paper, a branch and bound model with penalty tour building is developed for solving travelling salesman and transportation routing problems. The algorithm for determining the optimal solution of the problem is of the general form which can solve symmetric and asymmetric single and multiple travelling salesman problems (STS and MTS), and the transportation routing problems with capacity restrictions for the vehicles of same or of different capacities. The behavior of the developed algorithm is tested with randomly generated data. As an application, the routes for gas distribution is planned and carried out in several interior towns of a state, with the objective of making an efficient distribution in order to minimize the total cost of delivery with an optimal solution.     

Multiple ergonomic interventions and transportation safety

This article discusses arguments and research evidence concerning multiple ergonomic approaches to problems of transportation safety. Transportation accidents ( and their consequences) are the result of multifactor processes. Therefore, the probability of an- accident ( and of an injury, given an accident) can be influenced by interventions directed at any of the factors. Furthermore, the most effective accident countermeasures are not necessarily those directed at the ‘ cause’ of accidents. As examples, multiple ergonomic countermeasures are noted for road accidents involving alcohol-intoxicated drivers and elderly drivers, as well as for minimizing injuries resulting from road accidents     

基于GIS交通源分布数据库技术的研究

交通源分布是城市交通管理和规划的重点对象和考虑因素。本文探讨通过对现有的城市机动车辆数据和人口数据进行交通分区处理，建立人口与车辆等交通源分布的数据库系统，生成交通源GIS分布数据，为城市交通管理者在做有关城市交通管理和规划方面提供决策数据。     

基于时间工作流网的智能交通系统建模与分析

智能交通运输系统是目前世界各国交通运输领域竞相研究和开发的热点,但用工作流分析智能交通系统的研究尚不多见。文章在工作流网中加入时间参数,提出了一种工作流建模工具:时间工作流网,并用时间工作流网建立智能交通系统的工作流模型。最后对智能交通系统模型的时间性能进行分析。     

灰色预测方法在铁路春运客流预测中的应用

文章通过对车站客流数据的分析，认为火车站作为一个系统，是本征性灰色的，故选择使用灰色预测方法，对春运客流量做出预测，并根据实际预测结果对基本模型进行了优化：选择优化参数a,采用残差预测模型，新陈代谢模型等方法，解决了预测精度和可信度的问题。实际数据表明，预测结果是可信的。