现代化驼峰气动调速设备动力系统节能分析

根据多年驼峰气动系统的工作经验,对现代化驼峰气动调速设备动力系统的能耗问题进行多方面的分析,并由此提出节约能耗的方法和手段,为路内各编组站驼峰气动系统的节能工作提供一定的参考和帮助。     

Comparing smart scheme effects for congested highways

A high level objective for many international governments and local operators is that highways should be managed in a way that is sustainable in terms of a Low Carbon Energy future. Recent initiatives such as the Strategic Transport Technology Plan and the policy and legal framework promoted by the European Commissions’ Intelligent Transport System (ITS) Directive and ITS Action Plan may assist with this objective. However, many levels of complexity are inherent within the (ITS) schemes that are now part of highway management, due to the linkage of various technological components to complex systems and services. Maintaining efficient, sustainable co-operative performance is therefore a major task, with inconsistencies between product suppliers, network managers and operators. As a result, it is of considerable interest to the highway operators and high level policy makers to be able to assess the performance of individual ITS schemes and furthermore, to be able to compare performance between ITS schemes. In this paper, an illustration is provided of a methodology that can be used to assess the performance of ITS schemes according to a set of sustainability criteria. A case study is introduced which compares the performance of anticipated Active Traffic Management (ATM) schemes for what the road network operator (Highways England) perceive to be the four most congested highways in England (in terms of annual average daily traffic flows). Appropriate action can then be taken to improve the energy and sustainable management of Information Communication Technology (ICT) and transport systems for the benefit of a smarter, sustainable and efficient future.     

Probabilistic assessment of aviation CO2 emission targets

Passenger demand for air transportation is expected to continue growing into the future. The increase in operations will undoubtedly lead to an escalation in harmful carbon dioxide emissions, an adverse effect that governing bodies have been striving to mitigate. The International Air Transport Association has set aggressive environmental targets for the global aviation industry. This paper investigates the achievability of those targets in the US using a top-down partial equilibrium model of the aviation system complemented with a previously developed fleet turnover procedure. Three ‘enablers’ are considered: aircraft technologies, operational improvements and sustainable biofuels. To account for sources of uncertainty, Monte Carlo simulations are conducted to run a multitude of scenarios. It was found that the likelihood of meeting all targets is extremely low (0.3%) for the expected demand growth rates in the US. Results show that biofuels have the most impact on system CO₂ emissions, responsible for an average 64% of the total savings by 2050 (with aircraft technologies and operational improvements responsible for 31% and 5%, respectively). However, this impact is associated with high uncertainty and very dependent on both biofuel type and availability.     

Looking Beyond Cargo and Cruise Ships: Promoting Academic Marine Research and Clean Technologies as an Economic Development Strategy for Ports

The Port of Los Angeles (Port) is the largest container port in the Western Hemisphere, and a catalyst for business activity and employment. Historically, the majority of the Port's workforce lived in the communities directly adjacent to the Port. However, in the latter half of the last century, jobs and economic activity began to shift away from the Port, causing public attitudes in the local communities to change. Instead of being viewed as the source of their livelihood, local residents began to view the port as a generator of environmental impacts and industrial blight. Formidable community opposition to Port growth and modernization ensued. Employment within the Port district peaked in the mid 20th century at 100,000. By 2009, the Port had only 12,700 jobs. To re-establish and maintain a long-term positive relationship between the Port and its neighbors, the Port needed to increase the numbers of local residents in the port on a daily basis. The Port looked beyond its traditional role of cargo handling, to leverage creation of new water-dependent job clusters. The strategy incorporates elements of the traditional cluster concept by proposing to co-locate and create synergies between technology developers, university researchers, and marine and maritime industries.     

基于遗传算法的高速公路纵断面节能设计

为综合考虑高速公路构造成本和运营成本,详细分析了土石方成本和燃油消耗成本的影响因素,描述了土石方量和燃油消耗量的计算过程,以两者之和构造了适应度函数.然后对等距划分纵断面的变坡点进行二进制编码,基于遗传算法建立了一般情况下高速公路线路纵断面节能设计的模型与算法,致使线路设计的着眼点不再局限于强调工程造价的构造阶段,而是...     

温拌沥青在新疆地区长大隧道工程中的应用研究

结合新疆地区地域特征,研究和分析了温拌沥青混合料在新疆地区隧道工程中的应用。研究结果证实:温拌沥青混合料具有良好的路用性能,并改善了施工环境;在沥青中掺入温拌剂使可压实的时间延长,压实更为紧密,适合在新疆地区长大隧道工程中应用。     

北京地铁电能与水量消耗分析

由于北京地铁大运量的特点,使总能耗量相当巨大,因而节能降耗十分必要.本文针对北京地铁每条线路的实际能量消耗、列车的牵引用电消耗和其他所有动力用电消耗进行了分析,对于地铁各线路的水量消耗作了调查,所得结论可为节能型地铁的设计和运营提供依据.     

节能型双频段无线视频监控系统

针对市场上对兼容多频段无线监控系统的需求,设计并实现了一套节能型双频段无线监控系统,并对其中的关键技术新型结构的带通滤波器和混合型光伏发电系统实现方式进行了论述分析,给出了在工程中实用的设计方法,其测试结果显示该系统可有效的应用于无线视频监控中.     

车联网感知技术研究进展

车联网是物联网的具体应用,车联网获取车辆运行参数和道路等交通基础设施使用状况,感知实时道路交通路况,提供丰富的智能交通综合服务.介绍了车联网相关概念及系统构成,总结了车联网的感知关键技术的研究现状,如射频识别(RFID)、无线传感网(WSN)以及两者融合等,包括近期的研究工作,理论成果及实际应用等,探讨了存在的问题和今...     

基于物联网的道路交通管理系统分析

将道路交通中基础设施和相关要素通过EPC技术进行多样标签的编组,并运用物联网的核心技术之一的RFID进行识别,形成感应层。通过运用多种通信技术进行信息传输,构建基于物联网的道路交通体系构架和管理系统,并对道路交通的数据和信息进行分析、判断、处理,使道路交通体系构架内各层面相互协调、沟通,进行数据信息的传输与反馈。