电力用户谐波测量与评估

随着我国电力市场的建立和电能需求的大量增加,电能质量日益显示出其重要性,电力部门对电能质量的关注也日益增强。另一方面,随着用电设备的更新,用户对供电系统的电能质量提出了更高的要求。自上世纪80年代初开始,我国电力专家展开大规模的电力谐波研究,相关谐波国家标准已于1994年实行。本文介绍谐波国标在电气化铁路的应用经验,讨论电力用户谐波测量、评估方法,以及用户谐波指标分配公式的计算条件和参数含义。根据我国部分电气化铁道牵引变电所谐波实测数据,通过一些实例说明谐波国家标准GB/T 14549-1993用于电气化铁路存在的一些问题,并就贯彻执行谐波国家标准方面提出一些建议。     

技术标准体系与市场准入基础知识(1)

本讲座分三部分刊出,第一讲主要介绍技术标准体系和国际标准;国外先进标准及其体系、中国标准体系及管理模式。第二讲主要介绍市场准入和市场准入概述;国外市场准入制度;我国市场准入制度。第三讲主要介绍及评论我国铁路标准体系;市场准入;与世界铁路先进水平的差距。     

中国铁路引入安全评估标准的探讨

论述了我国铁路引入安全评估标准的必要性和可行性,通过对铁路安全评估标准基本概念、评估过程、方法及其标准体系建立的介绍,进一步加深对安全评估的认知度,并特别就我国铁路如何实施安全评估标准以及预见的成效作了较为详尽的探讨。     

直流大电流在线校准标准器的研制

介绍了直流大电流在线校准标准器的用途、主要技术性能、结构、设计原理及特点。     

汽车灯光和信号装置国标与欧标差异分析

本文主要从标准技术条款分析GB 4785-2007《汽车及挂车外部照明和光信号装置的安装规定》和ECE R48 06系列《关于在照明和光信号装置安装方面对机动车辆进行认证的统一规定》之间的标准差异。     

A framework to analyze the vulnerability of European road networks due to Sea-Level Rise (SLR) and sea storm surges

This study proposes a framework to explore the concepts of exposure, vulnerability and connectivity in EU road network and to assess the potential transportation infrastructure sensitivities towards Sea-Level Rise (SLR) and storm surges. The magnitude and significance of impacts were determined and knowledge of network robustness was built up based on existing climate data and on future trends. Various spatial databases were integrated and a four-stage transport model was used to explore the likely impacts of network degradation. The pattern of the network was assessed via both node- and link-based measurements, where different road databases, namely TRANS-TOOLS and Tele Atlas/TomTom, were employed in order to analyze the impact of spatial resolution within network connectivity analyses. This general framework developed for European Union, was tested on a specific and articulated case study area; namely, the north-east coastal region of Spain. The research conducted, yielded useful methods for the analysis of network vulnerability, where impacts are more significant in regional accessibility patterns. Accessibility indicators at the regional level changed drastically, with some regions showing up to a 26% decrease. According to the results of network connectivity indicators, the changes in network topology have reduced the number of alternative routes and placed more pressure on the transport system. The implementation of this framework and quantitative assessment methodologies outlined in this paper could be employed to assist policy makers to recognize the opportunities that may arise or diminish the adverse effects.     

海船驾驶员职业适宜性及其心理测评系统研究

体现以人为本的基本思想,从安全人机工程学的原理出发,根据海船驾驶员职业的特点,论述了海船驾驶职业适宜性及其心理测评系统研究的重要意义。结合海船驾驶员职业的实际,提出了海船驾驶员职业适宜性测评的基本项目及手段,并对建立海船驾驶员职业适宜性的条件和测试方式进行了研究,旨在最终建立起一套适合海船驾驶员职业适宜性的心理测试标准和具体指标,达到指导实际生产中海船驾驶员的选拔、培养、训练和提高的目的。     

高填方路基压实度的研究

通过试验及研究分析,认为采取提高高填方路基的压实度,可以加快高填方路基的沉降速度,减少沉降量。     

Values of travel time in Europe: Review and meta-analysis

This paper reports the most extensive meta-analysis of values of time yet conducted, covering 3109 monetary valuations assembled from 389 European studies conducted between 1963 and 2011. It aims to explain how valuations vary across studies, including over time and between countries. In addition to the customary coverage of in-vehicle time in review studies, this paper covers valuations of walk time, wait time, service headway, parking space search time, departure time switching, time in congested traffic, schedule delay early and late, mean lateness and the standard deviation of travel time. Valuations are found to vary with type of time, GDP, distance, journey purpose, mode, the monetary numeraire and a number of factors related to estimation. Model output values of time compare favourably with earnings data, replicate well official recommended values obtained from major national studies, and are transferable across countries. These implied monetary values serve as very useful benchmarks against which new evidence can be assessed and the meta-model provides parameters and values for countries and contexts where there is no other such evidence.     

沪杭高速铁路运营标准体系结构研究

选取沪杭高速铁路线路为示范和样本,运用系统理论和过程方法,遵循简化、统一、协调、优化的原则,结合铁路运输行业的服务特点,提出高速铁路路运营企业标准体系模板。论述标准体系的构建,探讨中国高速铁路运营标准体系建立和推广的必要性和发展方向。