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Q-DAS CAMERA~ Concept支持柔性和模块化应用,既可以应用于单个工作场所,也可为部门级、工厂级或区域级的综合系统提供解决方案。 相似文献
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Dietrich R. Bergmann 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1973,2(3):139-154
Vehicle dwell times are perhaps the most unpredictable parameters of station operations because of occasional passenger intervention. This paper reports on an investigation involving theoretical and Monte Carlo techniques to ascertain the sensitivity of station throughput to randomness in dwell times. Alternative configurations of vehicle loading positions, e.g., loading positions in parallel, in series, or in a series-parallel combination, are considered in an effort to rank the configurations by their associated performance levels. 相似文献
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Edgar Gold 《Maritime Policy and Management》2013,40(1):63-71
This paper highlights sources of finance for Soviet shipping companies. These include the fund for the development of production, science and technology, the shipping company's foreign currency fund, loans and centralized sources. Particular attention is paid to the structure of these funds and their purposes. Activities of the commercial shipping bank (Morbank) set up in 1989 are described. 相似文献
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ABSTRACT As maintenance and operation costs increase with usage over time, equipment is replaced when the value of new equipment is more attractive. Some methods have been developed to solve this problem. In the public transport sector, such problems are frequently analyzed by fleet managers and determined by bus age restriction regulations. We propose an Integer Programming model that integrates both budgetary and environmental constraints (CO2 emissions) which, as far as we know, have not previously been studied in conjunction. The study aims to determine the optimal replacement plan for a fleet of diesel buses of different size, age, maintenance costs and emissions rates, with new (less polluting) diesel buses over a time horizon of 50 years. The results indicate that it is possible to reduce emissions with a low annual budget using an optimal replacement policy. 相似文献
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