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.     

时速250km以上电气化接触网施工技术探讨

探讨了时速在250km以上的电气化接触网施工的工艺方法、相关的技术标准和接触网类型的选择。     

编组站调度计划无线传输系统的研究--PC与ND250A模块通讯的实现

主要介绍了编组站调度生产无线传输系统研制的背景与应用需求,并着重表述了系统主要部件无线数传模块日精NIS-SEI ND250A的RS232通讯协议及通讯方法,详细说明了VISUAL BASIC的通讯控件MSCOMM的属性、方法、事件.通过实例对利用MSCOMM通讯控件进行RS232串口通讯的设计方法进行了详细讨论,并最终实现了Win2000/xp环境下PC与无线数传模块的RS232串口通讯控制.     

锦州港25万吨级油品码头建设规划

近几年，锦州港港口吞吐量有了快速的增长，成品油的吞吐量在全港各货种中一直居于首位，对锦州港的发展举足轻重。目前锦州港油泊位的设计通过能力只有470万t／a，而2003年已完成油品吞吐量为720万t。现有设计能力已经远远不能满足锦州港发展要求。根据这种情况，锦州港拟建设25万吨级油品码头，以满足未来发展的需求，同时加强锦州港在环渤海经济区港群中的市场竞争地位。