GE内燃机车复兴KTZ车队

2008年年底之前,10台Evolution系内燃机车中的第一台离开了位于宾夕法尼亚州伊利的GE交通运输集团组装工厂,前往哈萨克斯坦。这10台机车是为提高哈萨克斯坦Temir Zholy（KTZ）公司14205km铁路网牵引能力订购的大量机车的首批机车,该铁路网的电气化线路不足％。     

Development and Evaluation of a High Voltage Supply Unit for Electrorheological Fluid Dampers

Controllable dampers using electrorheological (ER) fluids have attracted considerable interest in recent years. They are proposed for use in semi-active suspensions for ground vehicles. The main advantages of ER fluid dampers are their fast response, ease of control, simple construction and low power requirements. This paper describes the development and testing of a high-voltage supply unit for modulating the damping force of an ER fluid damper. Experimental results on the vibration isolation characteristics of an ER fluid damper with different control strategies, obtained using a quarter-car model test rig, are also presented.     

Synergies between Adjacent Beach-Nourishing Communities in a Morpho-Economic Coupled Coastline Model

Beach “nourishment” consists of placing sand on an eroding beach. The widened beach provides increased storm protection to adjacent structures and improved recreational benefits, but is most often transient, requiring on-going, repeated nourishment episodes. Numerical models of beach nourishment typically address such questions as how long a widened beach will last; economic models compare the benefits and costs of preserving a stretch of beach without regard to its geomorphic evolution. Neither have addressed the physical nor economic interactions between adjacent nourishing communities. Here, we couple a numerical model of coastline evolution and a cost-benefit model of beach nourishment, allowing adjacent communities to make dynamic nourishment decisions. Beach nourishment benefits adjacent communities both “updrift” and “downdrift.” The total amount of money spent on nourishment activities can decrease by as much as 25% when adjacent communities both conduct on-going nourishment projects, as opposed to the case where each community nourishes in isolation.     

Francilien列车开创宽体列车新时代

介绍了法国宽体列车的设计理念,以及主要的结构特点和技术参数。     

欧盟《电池和废电池报告草案》:部分措施或"扼杀"锂电池行业

欧洲锂电池行业贸易机构RECHARGE警告称,在2022年2月10日的投票之前,欧盟"电池和废电池报告草案"的部分内容可能会扼杀这一行业,令行业无法实现目标. 2月10日,欧洲议会的环境、公共卫生和食品安全委员会对这份报告进行了表决,报告更明确地定义了哪些电池可以进入市场,并对电池中的回收材料含量提出了最低要求.     

Lessons from a Multi-Scale Historical Reconstruction of Newfoundland and Labrador Fisheries

In this article we use a multi-scale, multi-method historical reconstruction of post– World War II social-ecological interactions within fisheries in Newfoundland and Labrador to explore the dynamics of intensification, expansion, and resource degradation in managed fisheries. Our case study draws on landings statistics, other archival information, and the Local Ecological Knowledge (LEK) of fish harvesters to explore these linked dynamics at the macro, meso, and micro levels. By some measures we found large scale trends toward intensification of effort leading to over-harvesting at macro (province wide) levels. At the same time, at the local level (micro-scale) and across sectors and regions (the meso-scale), we found highly fluid fishing practices and a complex suite of stated motivations for change. As a basis for effective governance, an understanding of the dynamics of interactive restructuring in social ecological systems will require multi-scale analyses that are sensitive to this complexity.     

法国AGV列车

介绍了法国AGV列车的结构特点以及主要的技术参数,并与TGV列车进行了对比.     

The problem of misdeclared container weight: perspectives from New Zealand and implications for its law

This paper addresses the problem of misdeclaring container weights, which causes accidents on land and sea, with serious consequences. It reviews the current international law, and the verification of container weight mandated in the Safety of Life at Sea (SOLAS) convention, and relates them to New Zealand law and practice as an example. It concludes that the SOLAS plan, simply written into local law, is unlikely to be enough by itself to fix the problem. It considers the points in the supply chain where responsibility could be placed for weighing and proposes a “chain of responsibility” approach with initial weighing by the shipper and check weighing later, especially at ports, with misdeclared containers being reportable as incidents. Such a system should deal comprehensively with the problem.     

Constructing Paradise: The Impacts of Big Tourism in the Mexican Coastal Zone

Although coastal tourism is often looked to as a way of generating foreign revenue, it can also engender a range of social and environmental impacts. From an historical perspective, this article examines the growth of Cancún in the Mexican state of Quintana Roo since the late 1960s. The article documents a range of socioeconomic and environmental impacts associated with the rise of coastal tourism, and suggests that centralized planning and the provision of physical and financial infrastructure does not prevent those impacts. The principal causes of these impacts are also described, including changes in land-usage, population, tourism markets, foreign market penetration and control, an emphasis on short-term economic gain, weak regulatory enforcement, and an overall lack of integration of coastal zone management.     

Effective Policy Evaluation: Refining Design Processes for Coastal Ecosystem Condition Indicators

To achieve the desired outcomes of ecosystem-based or integrated coastal management, paradigm shifts must occur in all stages of the policy process. This article focuses on the evaluative stage following policy implementation, specifically on the use of coastal ecosystem condition indicators. A review of the recent literature suggests that coastal ecosystem condition indicators with too broad a scale or too narrow a scope lose utility and applicability. An analysis of these problems of scale and scope reveals that the process through which an index is designed and selected can hinder or heighten its validity. Local and diverse stakeholder input can help to ameliorate weaknesses, increasing the evaluative validity of coastal ecosystem condition indicators.