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排序方式: 共有427条查询结果,搜索用时 421 毫秒
51.
张兴容 《铁道劳动安全卫生与环保》1999,26(3):194-197
为减少火灾事故,介绍了“工厂火灾、爆炸场所危险度综合评价法”,“道氏法”是该法的基础。分析了“道氏法”的不足,而提出了固定危险和现实补偿的综合性计算方法。还通过实例记述了新方法的优点、基本原理和应用方法。该法能用于评价工厂企业危险设备、装置与场所的火灾、爆炸危险程度。 相似文献
52.
The European Community has provided valuable support to short sea shipping through various programs and legislation. This
paper analyses the situation while focusing on the Mediterranean Sea and suggests solutions for addressing the short sea shipping
problems in this special region. The biggest challenge for all sides in the comingyears will be the replacement of the existing
fleet. The study presented herein gives an insightful and collective picture of the situation, while focusing on the Greek
owned short sea vessels. 相似文献
53.
P. F. Sweatman P. N. Joubert 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1976,5(3):155-170
Driver steering performance in a simple circular lane-keeping task, as dependent on the directional response characteristics of the vehicle, was measured. Response Surface Methodology models of steering performance are presented. Several canonical variables describe the drivers responses to vehicle changes. Clear-cut optimum vehicle characteristics cannot be determined, but certain combinations of vehicle characteristics are seen to be undesirable for various reasons related to theoretical mechanisms of driver steering control. 相似文献
54.
Edward N. Skomal 《先进运输杂志》1984,18(3):259-277
Through an examination of the dependence of several key performance parameters of a public bus system upon Automatic Vehicle Location (AVL) estimation accuracy, it becomes possible to place in perspective the value of AVL technology to improved public conveyance performance. Important bus transportation system performance measures dependent upon AVL estimation accuracy are: (1) Headway Control Error; (2) Time-Of-Passage Error, and (3) Required Layover Reserve. An analytical model of the dependence of these bus system performance measures upon AVL estimation error has been constructed. In addition, error models of three basic types of AVL systems, i.e., dead reckoning, proximity, and radio location have been developed and validated by experimental comparisons. By employing both sets of models, i.e. for the bus transport and AVL systems it becomes possible to recommend appropriate AVL technologies that best meet the performance requirements of a public bus service. The accompanying text synopsizes the noted models and provides an example of their use. 相似文献
55.
W. Kortü m D. N. Wormley Professor 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1981,10(4):285-317
The technical state-of-the-art of ground transportation vehicles interacting with flexible, perturbed guideway systems is reviewed with emphasis on high-speed passenger-carrying systems. Currently available modelling, analysis, and simulation techniques as well as parametric results illustrating the dominant interaction dynamics are summarized. Experimental studies and correlations of field data with analytical results are described and areas in which further research is required are identified. 相似文献
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Harilaos N. Psaraftis 《Transportation Research Part B: Methodological》1983,17(2):133-145
We develop an O(N2) heuristic to solve the single vehicle many-to-many Euclidean Dial-A-Ride problem. The heuristic is based on the Minimum Spanning Tree of the modes of the problem. The algorithm's worst case performance is four times the length of the optimal Dial-A-Ride tour. An analysis of the algorithm's average performance reveals that in terms of sizes of single-vehicle problems that are likely to be encountered in the real world (up to 100 nodes) and in terms of computational complexity, the O(N2) heuristic performs equally well, or, in many cases, better than heuristics described earlier by Stein for the same problem. The performance of the heuristic exhibits statistical stability over a broad range of problem sizes. 相似文献
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60.
Harilaos N. Psaraftis 《Journal of Marine Science and Technology》2012,17(3):390-402
The method of Formal Safety Assessment (FSA) was devised several years ago with the intent to help the International Maritime Organization (IMO) and other policy makers formulate policies and regulations by the proper use of the scientific method in matters pertaining to maritime safety and the protection of the marine environment. A host of FSA studies have been submitted over the last several years and have been reviewed by the IMO. Also, progress has been recently accomplished as regards incorporating environmental risk evaluation criteria within FSA. On the basis of these developments, revisions of the FSA guidelines have been proposed and adopted. This paper presents a review of the FSA method in light of these developments. This review updates an earlier review of FSA by Kontovas and Psaraftis [Marine Technol 46(1):45?C59, (2009)]. It also takes this opportunity to identify some deficiencies of FSA, either due to an incorrect application of the method or to the method itself, and makes some suggestions for further action in this area. 相似文献