基于遗传算法自动舵模糊控制研究

本文采用遗传算法对模糊控制规则进行优化,并将之应用于船舶自动舵控制系统中。经过仿真证明,该方法和普通模糊控制相比具有较好的控制性能     

车用汽油机射流燃烧系统的研究进展

汽油机射流燃烧系统已有多年的研究开发和实践，经过反复考验，其优越性得到证实。本文从射流室的特殊结构特点出发，利用多通道光纤高速摄影照片和示功图分析并结合紊流燃烧理论，对射流燃烧过程的燃烧特性进行的研究，论证了其诸多方面的优越性。还介绍了目前的研究进展。     

高速公路交通流建模综述

交通流建模是智能交通自动控制、分析、设计、仿真和决策的前提 ,历来是交通工程界的一个重要的研究课题 ,分三条主线 (宏观交通流模型、微观交通流模型、其它交通流模型 )对交通流建模的发展做了详细介绍 ,并在文末提出了对交通流建模今后发展的展望     

Estimating the trip generation impacts of autonomous vehicles on car travel in Victoria,Australia

Autonomous vehicles (AVs) potentially increase vehicle travel by reducing travel and parking costs and by providing improved mobility to those who are too young to drive or older people. The increase in vehicle travel could be generated by both trip diversion from other modes and entirely new trips. Existing studies however tend to overlook AVs’ impacts on entirely new trips. There is a need to develop a methodology for estimating possible impacts of AVs on entirely new trips across all age groups. This paper explores the impacts of AVs on car trips using a case study of Victoria, Australia. A new methodology for estimating entirely new trips associated with AVs is proposed by measuring gaps in travel need at different life stages. Results show that AVs would increase daily trips by 4.14% on average. The 76+ age group would have the largest increase of 18.5%, followed by the 18–24 age group and the 12–17 age group with 14.6 and 11.1% respectively. If car occupancy remains constant in AV scenarios, entirely new trips and trip diversions from public transport and active modes would lead to a 7.31% increase in car trips. However increases in car travel are substantially magnified by reduced car occupancy rates, a trend evidenced throughout the world. Car occupancy would need to increase by at least 5.3–7.3% to keep car trips unchanged in AV scenarios.     

Recognizing metro-bus transfers from smart card data

Transfer points between metro and bus services remain an elusive, yet critical junction for transportation practitioners. Based on massive Smart Card (SC) data, previous studies apply a one-size-fits-all criterion to discriminate between transfers. However, this is not sufficiently convincing for different transfer pairs. To counter this problem, this study applies an association rules algorithm and cluster analysis to recognize metro-to-bus transfers using SC data, and demonstrates transfer recognition in a case study based on SC data collected during a week in Nanjing, China. It is shown that 85% of the transfer-recognition results are quite stable through the whole week, and the median transfer time between metro and bus is below 20?min. The method proposed in this study can be used to identify the busiest transfer points and to obtain average transfer times, which facilitates a smarter and more efficient public transit network.     

提高和改善大型集装箱船舶装载能力的探讨

充分掌握大型集装箱船在满足船舶规范规定的适航、适货条件（船舶吃水、稳性、强度、系固、安全航行及适货要求）,结合国际及国内有关法规及港口有关规定,提高和改善其装载能力,发挥更大经济效益是值得深入探讨的。     

尘肺X线胸片的计算机辅助诊断

用模拟和数字两种方法增强图象，以突出病灶，然后运用新颖的区域生长法识别、测量单个尘肺小阴影，通过统计运算进行尘肺病的诊断和分期。此种辅助诊断方法，提供信息直观可靠。３０例Ｘ线胸片密集度测定结果，与矽肺病期级别相一致。     

实时监控系统中Visual FoxPro与C++接口的研究

在分析研究集团电话计费管理系统的实时监控子系统中的数据采集与数据管理之间的接口问题的基础上发现常用的实现方法及其不足之处,随后提出直接将数据存入数据库和使用动态链接库的方法,并对它们的实现作了简要的介绍。     

A quarter a century of port management in Europe: objectives and tools

The past quarter of a century has brought with it significant change in the field of port management, both in terms of the goals that are set and the tools used. This trend has resulted in increased pressure on port authorities. The purpose of this paper is to deal in greater detail with developments in this area of port economics.     

Railway Vehicles with Perfect Curving Behaviour Which are Asymptotically Stable at Vanishing Speed

Paper deals with the linear behaviour of a railway vehicle with any arbitrary number of wheelsets, body parts and connecting elements. A vehicle which has both perfect curving properties and asymptotical stability at vanishing speed, has to satisfy a twofold condition, indicated by Wickens in 1978. In the present paper this condition is derived in reliance upon the dimension theorem for linear mappings. How the investigation can be executed in practice, is shown for the case of a two-axled vehicle. At last the behaviour in a transition curve is discussed.