解析JT/T325-2010《营运客车类型划分及等级评定》

JT/T325-2010相对于JT/T325-2006的修订更改内容进行解析,以便于各界更好的理解和落实JT/T325-2010。     

同步带传动的极限速度和最佳速度

根据梯形齿同步带传动额定功率计算公式,推导出同步带传动的极限速度和最佳速度计算公式;求出了7种梯形齿同步带带宽为基准宽度、啮合齿数系数为1时的极限速度和最佳速度.     

Sustainability Assessment of Transport Infrastructure Projects: A Review of Existing Tools and Methods

Abstract

Attempts to integrate sustainability in the decision-making process for transport infrastructure projects continue to gain momentum. A number of tools and methodological frameworks are available — such as rating systems, traditional decision-making techniques, checklists, and different evaluation frameworks and models. While these tools are highly valuable, some practical issues remain unsolved. There is also a need for more standardized tools to appraise the sustainability of transport projects. This paper is a presentation of a review on the current assessment tools of sustainability applied to transport infrastructure projects. The preliminary part of the paper is an explanatory and comparative analysis of the tools and methods in terms of their effectiveness to appraise sustainability. The analysis is a critical evaluation of the current state of the art to identify the limitations of existing approaches, point out new areas of research, and propose a sustainability appraisal agenda for the future.     

几种危险路段护栏设计探讨

对几种危险路段的事故危险特征和设计缺陷的分析,重点介绍了极限最小半径曲线路段、隧道洞口、长直线末端接一般最小半径曲线路段、连续长陡下坡路段护栏设计。通过建立计算模型等模式深入探讨护栏设计方法及技术解决措施,旨在设计出满足道路使用需求的护栏,充分保护道路使用者的安全。     

《客车类型划分及等级评定》新旧标准对此

通过JT／T325—2010与JT／T325—2006的对比,梳理出修改的主要内容,帮助有关人员进一步熟悉新标准。     

重庆市国省干线公路抗灾能力模糊综合评价研究

笔者在文中以重庆市国省干线公路灾害调查与特征分析为基础,用层次分析法(AHP)建立重庆市国省干线公路抗灾能力评价指标体系,用模糊评价原理对重庆市国省干线公路抗灾能力进行了模糊综合评价,得到了评价结论.