LED铁路信号光源应用技术研究

LED作为铁路信号机构的光源体,已经成为在线运用铁路信号的组成部分。在阐述LED发光元件基本制造原理的基础上,论述了影响LED铁路信号光学品质的诸多因素,并提出了解决方案。在关注LED技术快速发展的同时,提出了铁路信号如何能够顺应的构思。     

南昌绕城公路赣江中支特大桥加固设计

根据赣江中支特大桥梁体破损情况,进行受力分析,提出设计方案,介绍加固原则及方法,探讨严重损伤桥梁加固的前景及意义.     

中国VTS的发展历程

本文回顾了中国ＶＴＳ的发展历程;对中国ＶＴＳ系统的类型、规模、功能、水平、机构和人员情况进行了全面评价;介绍了中国ＶＴＳ的作用和效益;阐述了今后的发展政策     

Prospect Theory for joint time and money consequences in risk and ambiguity

Transport users face complex decisions. Not only are the consequences of their choices uncertain, but they generally involve several attributes, such as time and money. Time-money tradeoffs have been studied in depth in transport economics, and research is now paying increasing attention to the role of uncertainty and information in transport decisions. This paper aims to measure the impact of uncertainty and information on multi-attribute decisions using Prospect Theory. In doing so, the study makes two contributions to transportation literature: one methodological and the other empirical. First, we propose a fast and tractable method for measuring Prospect Theory parameters that capture attitudes towards probabilities (probability weighting function) and attitudes towards losses (loss aversion). The elicitation method does not require the elicitation of the utility function. This makes it particularly suitable in complex multi-attribute decisions where the shape of the utility function is unknown. Second, we present the results of an experiment that uses the proposed method to measure, at the individual level, probability weighting in decisions involving joint time and money consequences in two decision contexts: risk (where probabilities are given) and ambiguity (where the probability distribution is unknown). An experimental setup that exposes subjects to real gains and losses for money and time has been built for this purpose. We observe inverse S-shaped probability weighting and loss aversion for risk. Probability weighting is even more pronounced in ambiguity, where subjects do not have precise information about the probability distribution. We explain how these results and the analysis of ambiguity attitudes in general can offer a better understanding of travelers’ route or transport mode choices.     

广西甩挂运输发展对策研究

道路汽车甩挂运输在货物运输效率和节能减排效果上有显著的效益,正逐步得到社会各界的广泛关注。文章基于广西甩挂运输发展现状,预测分析广西发展道路甩挂运输的市场前景,并提出了广西发展甩挂运输的对策。     

二甲醚汽车发展现状研究及前景分析

概述了二甲醚汽车在国内外的发展现状,通过对二甲醚汽车特点和经济、社会效益的分析,认为发展二甲醚汽车无论在推广成本、产品安全性、经济性、还是在环保和产业带动等方面都有良好表现,值得社会关注并大力推广。     

Modeling the Effects of Population Density on Prospect Theory-Based Travel Mode-Choice Equilibrium

In conventional transportation planning models, it was always assumed that the population density is given and fixed in the study areas. Therefore, the effects of population density on travel choice have not been explicitly incorporated into these existing models for long-term transportation planning. Meanwhile, travel choice models in previous studies are usually developed by using discrete choice theories or user equilibrium principle. Thus, many significant characteristics of travelers’ behaviors, such as risk preference and learning process over time, cannot be considered in these conventional models. This article proposes a convex prospect theory-based model to investigate the effects of population density on the travelers’ mode-choice behavior under an advanced transportation information system (ATIS) in a multimodal transportation corridor. It is shown that population density is closely co-related to the modal split results and dependent on the performance of the railway mode in the study corridor. The park-and-ride mode may not be suitable for areas with high population density. This article also investigates the travelers’ reference points on the generalized travel costs by modes. A numerical example is given to illustrate the properties of the proposed model together with some insightful findings.     

两岸高等教育交流的挑战与展望

文章论述了两岸高等教育的挑战,分析了两岸高等教育交流现状,并提出扩大学术教育交流、构建学术交流平台、建立学术对话机制、拓展学术文教交流等相应对策,具有一定的借鉴意义。     

中琉历史关系研究的回顾与展望

过去40年,中琉历史关系研究整理了许多的文献档案资料,这是研究工作深入推进的基础。学术的研究主要围绕中琉册封与进贡、航海与贸易、人员的移动和文化的交流展开论述。通过对现有研究存在的问题和不足的思考,进一步提出今后研究可以拓展的空间。     

广东联网收费技术现状与发展探讨

广东在2003年探索实施高速公路联网收费,从制订技术标准和拆分账结算服务入手,取得了显著成效。根据近年来广东高速公路联网收费的运营情况,分析技术现状,展望未来,提出相关的问题。