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Transportation - It is widely believed that vehicle automation will change how travelers perceive the value of travel time (VoTT), but the magnitude of this effect is still unknown. This study... 相似文献
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Nguyen Thi Minh Hang Nguyen Cao Don Hiroyuki Araki Hiroyuki Yamanishi Kenichi Koga 《Journal of Marine Systems》2009,75(1-2):1-16
In this study, we present the development and application of a new ecosystem model coupled with a hydrodynamic model to describe the important physical, chemical and biological processes of an ecosystem in the marine environment, the Ariake Sea in the west coast of Kyushu, Japan. The model was calibrated and validated using in-situ field measurements from various monitoring stations in the sea. The presented results covered the period from January 1991 to December 2000. The results showed that chlorophyll-a, nutrients and dissolved oxygen levels varied seasonally in response to weather and boundary condition. Through this study, the model was shown to be able to handle the flooding and drying processes that usually exist and play an essential role over the estuarine-tidal flats of the sea. 相似文献
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铁路冷藏集装箱运输配套设施一直是制约铁路冷藏集装箱运输业发展的重要因素。作者在文中介绍了铁路冷藏集装箱堆场CAD系统的实现过程,系统功能,系统的组成,设计思想及数据处理流程。该系统对于建立和修改铁路冷藏集装箱堆场设计有研究意义。 相似文献
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Abstract The term “mitigation”; has been used in connection with habitat losses attributable to federal water projects as early as the Rivers and Harbors Act of 1899 and the Fish and Wildlife Coordination Act of 1934. Most of the current requirements to mitigate habitat losses associated with water development projects apply to wetlands, as they are biologically productive and have been destroyed at an increasing rate during recent years by developers seeking prime land in the coastal zone. A case study of the Port of Coos Bay and the City of North Bend, Oregon, provides an actual experience of estuarine mitigation in a dredging project and an airport fill. The case was developed as part of a larger curriculum research study for seaport management. This article is primarily written as a case with a brief introduction and discussion of mitigation requirements, followed by the text of the case and ending with a series of hypotheses for further research. 相似文献
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Rosaline Canessa Michael Butler Claudette Leblanc Christian Stewart Don Howes 《Coastal management》2013,41(1):105-142
Access to current, comprehensive, and reliable spatial information is necessary for informed decision making in integrated coastal and ocean management. This need is being met through development of a marine spatial information infrastructure that encompasses both technological and institutional responses. This article traces Canada's experience in developing a marine spatial information infrastructure over the last 30 years starting with the compilation of coastal atlases, through the development of geographic information systems, to remote data acquisition instruments and Web mapping portals. Because of the plethora of initiatives, it has been essential to be selected and limit the number and choice of examples. The institutional response has lagged behind that of technological innovation and hinges on understanding users’ needs and decision support drivers, sustainability of institutional and individual champions, and, above all, cooperation and collaboration among the broad community of practice. 相似文献
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日照港一公司煤炭装卸设备是20世纪80年代初从国外引进的、自动化程度较高的煤炭专用装卸生产线.其中2台翻车机原设计卸车能力为1 500万t/a,2001年以来翻车机卸车量达2 000万t/a.长期超负荷作业使翻车机部分部件严重磨损,并导致失效. 相似文献