Warehouse location problems for air freight forwarders: a challenge created by the airport relocation

The move of Hong Kong International Airport from the city centre to a suburban area in July 1998 provided sufficient capacity to meet the increasing demand of passenger and air-cargo flows in Hong Kong in the foreseeable future. However, the move has adverse side effects such as causing the readjustment of many existing systems and creating many imminent strategic problems. One of such problems is the warehouse location of freight forwarders: they have to decide whether they should locate their warehouses in the new airport, in current locations, or in new locations somewhere in the city. This paper delineates the results of a survey conducted in the summer of 1997 before the airport was relocated. The survey asked what decisions the freight forwarders had made and how they evaluated some potential warehouse locations. The paper also considers two mathematical models, which explain and predict, respectively, the location pattern of freight forwarder warehouses before and after the relocation of the airport.     

国际标准ISO5151-2010低温制热测试解析

通过对ISO 5151-2010标准中热泵低温制热测试方法的解析,阐明低温制热的测试环节、不同运行表现热泵的具体测试方法和要求以及测试误差的主要来源,从而得出热泵低温制热测试要对不同运行表现热泵进行分类并采用不同的数据采集方法和要求,才能减小测试误差,各试验室在同一规定的测试方法和要求下测试其测试数据才有可比性。     

羰基合成法制取高纯纳米氧化铁工艺研究

纳米氧化铁是近年来研发的新型纳米材料,它具有良好的光学、磁性、催化性能,在涂料、磁性材料、医学磁介质和催化等方面有广泛的应用前景,采用传统技术生产的纳米氧化铁因其粒度分布宽,纯度低等问题无法用于生物医药等高端领域,本文通过实验的方法介绍了一种新型高纯纳米氧化铁生产技术,可为高纯纳米氧化铁的研究和生产提供参考。     

Air Afrique: the demise of a continental icon

Although the rationale for multi-flag airlines' formation is rooted in contemporary strategic thinking, our understanding of their emergence and subsequent mass disappearances in the twentieth century remains an elusive issue. This article seeks to fill this void by examining the emergence, ascendency and demise of Air Afrique, an airline once seen as a symbol of regional integration in Africa. This examination takes a historical perspective and covers the period from 1961 to 2002. On the basis of this historical analysis, five distinct stages have been identified reflecting the firm's glorious days, precipitous decline and subsequent collapse. These are: the golden age; Africanisation; escalating indecision, escalating commitment and dissolution phases. Each phase provides insights into the deterministic and voluntaristic perspectives of organisational failure. The implications of the findings of this research for theory and practice are discussed.     

空分产品放空-供气自动调节的PID控制方法

本文使用一种分段控制方法，将空分产品管线的放空、供气阀门使用同一PID模块进行电流分段控制，从而解决了两阀门相关性问题，降低了控制成本，简化了控制难度。     

Bush v. Gore and the Effect of New Source Review on Power Plant Emissions

New Source Review (NSR) is a Clean Air Act regulation that requires electric utilities to meet emission standards when making modifications to existing power plants. The regulation increases the cost of replacing worn out parts, and limits the firm’s scope of potential capital investments. Such restrictions may lead to greater retirements and lower utilization, adversely affecting profits. Prior to the 2000 presidential election, investors expected Bush to have a narrower interpretation of NSR than Gore. Therefore, we use changes in stock prices to estimate the effect on profits of differences in NSR policy. Our results indicate that investors expected the average boiler to be $38 million more valuable under the Bush administration. Over the boilers’ lifetimes, the additional utilization will have increased emissions by 19 million tons of sulfur dioxide, 5.9 million tons of nitrogen oxides and 980 million tons of carbon dioxide, relative to natural gas generation.      

2000年来四个直辖市经济增长与空气环境质量变化的实证分析

本文选取2000年－2006年的北京、上海、天津、重庆四个地区大气环境质量及经济增长率的统计资料，运用面板数据建立了相应的计量模型，实证结果表明，经济的快速增长，并不必然伴随着环境质量的持续下降，市场经济发展也可创造改善环境质量的内生动力，并且政府环保政策在环境质量的改善方面也起到了重要的作用。     

Robustness of the air transport network

This paper presents a methodology for the detection of critical airports (those whose isolation would cause the largest losses in network connectivity) in the global air transport network (ATN), based on simulating an attack on selected ATN airports using different adaptive selection criteria. The performances of several node selection criteria are compared, together with a new criterion based on Bonacich power centrality. The results show that most critical airports can be detected with an adaptive strategy based on betweenness centrality. The detection of such airports may help the development of contingency plans to develop an appropriate response to any airport closure.     

Implementing technology-forcing policies: The 1970 Clean Air Act Amendments and the introduction of advanced automotive emissions controls in the United States

Technology forcing is a strategy where a regulator specifies a standard that cannot be met with existing technology, or at least not at an acceptable cost. Using the 1970 U.S. Clean Air Act for controlling automobile emissions as a baseline example, we demonstrate the importance of the regulatory implementation process if regulations are to foster technological change. The 1970 legislation required steep emissions reductions for new 1975 and 1976 automobiles, which presented automakers with major technical and economic challenges. Nevertheless, the U.S. Environmental Protection Agency successfully forced the adoption of two marquee control technologies—the catalytic converter in 1975 and the three-way catalyst in 1981. We focus on three factors critical to the implementation process: agency credibility to enforce standards, competitive pressures to drive industry research and development, and uncertainty about technological development.     

CRM在航空货物运输代理行业中的应用

本文就国际货物航空运输行业的角度出发,先介绍了航空运输的基本知识、主要服务的行业、确定市场对于航空运输的需求。有了市场需求,似乎航空运输就很好做了。实际不尽然。真正服务到客户才是根本。