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。     

Conceptual framework for Comparing University baccalaureate programmes in shipping management

For a long time, a maritime education meant the education of a mariner where technical knowledge of seafaring was taught. However, shipping has evolved into a global and sophisticated business where two kinds of managers are required: one that deals with the operation of the vessel and the other that deals with the shore-side business. The education landscape for shipping has also evolved with time. A mariner’s education has evolved from apprenticeship on a ship to a professional certificate from maritime academies. The shore-side business is traditionally staffed by master mariners that made the career transition from sea to shore but the current staffing trend is to employ graduates schooled in business and/or management. It has been long recognised that shore-side business personnel should ideally be also knowledgeable in vessel operations. Under this scenario, several maritime degree programmes have cropped up around the world to bridge the knowledge gap of shore-side business personnel. This paper provides an overview of the evolution of maritime education and selected maritime degree programmes around the world and proposes a conceptual framework for comparing the programmes. The conceptual framework serves as a guide for evaluating maritime education and an aid to curriculum design where choices of courses need to be made to fit into a 3-year or 4-year study programme.     

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.     

An idealized model of interaction between fronds of the large seaweed Durvillaea antarctica

The effect of interactions between individual fronds in a bed of the large intertidal seaweed Durvillaea antarctica, when forced by breaking waves, is studied using a computational model. The model simulates the response of a seaweed bed using a sequence of connected oscillators which are excited by a propagating forcing function representing a breaking ocean wave. Two new facets of the interplay between seaweeds and hydrodynamics are considered: (i) wave forcing due to breaking waves is often not sinusoidal in the rocky intertidal zone and (ii) a frond interaction term is included. The addition of frond interaction reduces the maximum loading on individuals within the bed by around 30% using estimated biomechanical parameters. The rate of change of the loading on the holdfast (equivalent to the “jerk”) is affected in a similar or greater fashion.