基于离散势能场的行人路径规划算法研究

复杂二维场景中的行人路径规划是行人仿真研究体系中微观仿真服务的关键性问题之一。针对该问题提出基于离散势能场的路径规划算法，给出总体算法的流程，并针对离散势能场的生成算法、离散路径的合理化方法等关键环节进行详细论述，最后经算例证明该算法具有一定的有效性，同时存在一定的局限性。     

《联锁表》之敌对信号的设计方法

从4个方面阐述《联锁表》之敌对信号设计方法,总结敌对信号的设计规律,以及对敌对信号条件的描述均具独到的见解,对如何编制《联锁表》、提高《联锁表》设计质量具有很大的参考意义。     

手机提供拥挤信息的公交路径选择研究

在公交网络中，智能手机提供的出行信息可为公交出行乘客提供有效帮助. 在手机提供车内拥挤信息条件下，对乘客的路径选择过程进行模拟，构建乘客出行和换乘两种路径选择模型，包括车内的座位分配过程和在站台的排队过程. 通过仿真计算，比较了提供拥挤信息与不提供拥挤信息条件下车内拥挤程度改善情况，揭示了提供拥挤信息条件下乘客的路径选择规律. 结果表明，手机提供车内拥挤信息可以大幅度降低车内的拥挤程度，有效改善乘客的乘车环境.     

关于转场进路电码化的一点探讨

列车在进行本线转场和跨线转场作业时,存在电码化载频的选择问题,通过逻辑电路的“记忆”功能,合理选择并自动切换载频.     

张家界地区不稳定斜坡及滑坡对黔张常铁路选线的影响研究

通过对黔张常铁路张家界地区不稳定斜坡及滑坡的调查和分析,得出本区不稳定斜坡及滑坡的分布特点、成因机理及最主要影响因素。对边坡进行定性稳定性分析,并选取典型剖面进行了定量分析,同时初步评价不稳定斜坡及滑坡对工程建设的影响,进一步提出在该类地区选线时应注意的问题及选线原则,为线路的优化和滑坡防治提供了坚实的理论基础,同时希望提高对不稳定斜坡的认识和理解,引起对不稳定斜坡的重视。     

破解深化产教融合瓶颈探索加快高等职业教育发展路径

本文以行业性高职院校产教融合的实践探索为切入点,以湖北省职业教育改革为例,对中部地区高职教育产教融合的重要举措、存在的问题进行了系统分析,对深化产教融合加快高等职业教育发展提出了相关建议。     

Safety-based path finding in urban areas for older drivers and bicyclists

This paper presents a safety-based path finding methodology for older drivers and bicyclists in an urban area. The paths are estimated based on costs consisting of both safety and travel time. Safety is evaluated against potential risk of a crash involving an older driver (or a bicyclist) with other vehicles present on the road. To accomplish this, simple formulations are developed for safety indicators of streets and intersections, which are actually generic irrespective of the type of road user. Traffic attributes such as speed and density, driver attributes such as perception-reaction time and street attributes of length and tire-to-road friction coefficient are taken into account in building the safety indicators. Thus, the safety indicators do not necessarily require historical crash data which may or may not be available during path finding. Subsequently, a multi-objective shortest path algorithm is presented that identifies the best path (the non-inferior path) from amongst a set of selected safest paths with due considerations to travel time incurred on each. A simple application example of the proposed methodology is demonstrated on an existing street network system from the City of College Station, Texas. The contributions of this research are twofold – first, the safety indicators can be used by planners in determining high crash potential sites – streets and/or intersections – and second, the safety-based path finding methodology developed in this paper can be integrated with modern day route planning devices and tools in guiding older drivers and bicyclists within an Intelligent Transportation Systems framework.     

The introduction of innovation in Urban transport

More than 200 new systems of transport have been proposed as solutions to problems of urban congestion. However, very few of these have reached even the prototype stage and practically none at all have ever actually been installed.

The author asks himself why this is so. If an invention is to be introduced into a field which is poorly receptive to innovation, it must not only bring something really new and attractive for the users on the functional level as opposed merely to the technological level, but must also consider the political, industrial, social and human context.

The author gives two examples of innovation conceived and developed at the Battelle Geneva Research Centre: one for private transport, a new system for an electric car which will include the interests of the petrol industry, and the other for public transport, the “Speedaway” sponsored by Dunlop Limited. These two systems will be put on the market shortly and will attempt to fulfill the criteria mentioned above.     

British location rents: an interpretation of the dual transportation problem for commodity flows

The transportation problem is solved for a number of commodity flow matrices for Britain for 1972. The commodities were selected because of the likelihood of the transportation problem producing a relatively good fit. Commodities were also chosen when it was thought that accessibility was a key location factor. The rationalisation of the interpretation of the dual values as shadow prices and location rents is outlined and, after discussing the merits of alternative means of analysing and presenting the dual values, the distribution of these values are compared with the actual location of industry. Some difficulties and further implications of the approach are suggested.