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排序方式: 共有216条查询结果,搜索用时 15 毫秒
31.
阐述了基于C/S模式与B/S模式相结合的大型国有企业人力资源管理信息系统的功能以及设计开发方法,;研究并提出了采用这两种模式相结合的MIS开发平台的设计方法,通过对两种模式的比较,说明了为什么采用这种开发平台以及这种开发平台的特点。 相似文献
32.
33.
A. D. De Pater 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1989,18(5):243-274
A survey is given of the theory developed by author during recent years for an optimal design of railway vehicle running gears. It enables the designer to build a running gear which at the same time has good curving properties and is stable up to a high vehicle speed. 相似文献
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35.
Shi Kunbo Cheng Long De Vos Jonas Yang Yongchun Cao Wanpeng Witlox Frank 《Transportation》2021,48(5):2605-2625
Transportation - A considerable number of empirical studies have explored the effects of information & communication technologies (ICT) on travel in recent years. In particular, the most... 相似文献
36.
Transportation - Numerous studies have found that travel attitudes might not only affect travel behavior, but also the residential location choice as people might choose a residential location... 相似文献
37.
从传热机理出发,对高大建筑空间的采暖方式进行分析,指出各种采暖方式的优缺点,并着重介绍了横向热风幕分层采暖方式的数值模拟和现场实测结果,说明在高大厂房中采用该采暖方式可获得较高的热舒适性。 相似文献
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39.
Griet De Backer Marc Vantorre Peter Frigaard Charlotte Beels Julien De Rouck 《Journal of Marine Science and Technology》2010,15(2):119-130
Oscillating point absorber buoys may rise out of the water and be subjected to bottom slamming upon re-entering the water.
Numerical simulations are performed to estimate the power absorption, the impact velocities and the corresponding slamming
forces for various slamming constraints. Three buoy shapes are considered: a hemisphere and two conical shapes with deadrise
angles of 30° and 45°, with a waterline diameter of 5 m. The simulations indicate that the risk of rising out of the water
is largely dependent on the buoy draft and sea state. Although associated with power losses, emergence occurrence probabilities
can be significantly reduced by adapting the control parameters. The magnitude of the slamming load is severely influenced
by the buoy shape. The ratio between the peak impact load on the hemisphere and that on the 45° cone is approximately 2, whereas
the power absorption is only 4–8% higher for the 45° cone. This work illustrates the need to include slamming considerations
aside from power absorption criteria in the buoy shape design process and the control strategy. 相似文献
40.
Theo E. Notteboom Athanasios A. Pallis Peter W. De Langen Aimilia Papachristou 《Maritime Policy and Management》2013,40(7):636-653
Port economics, management and policy have progressively emerged as a distinctive research field, and a core part of maritime economics. This paper provides an analysis of all the 267 port studies published in Maritime Policy & Management (MPM) since its inception in 1973. This paper provides a content analysis for seven interrelated research theme categories including main research topics and methods, authorship distribution and citation counts. It is demonstrated that MPM played, and continues to play, a key role in publishing research on seaports. The published research increasingly applies established analytical frameworks to ports. The paper concludes with a discussion on current challenges for port-related research. 相似文献