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When people pass through a narrow passage, once the perceived disaster will cause the crowd to generate pressure, to promote their competitive behavior, which lead to disorder and congestion. This is a very serious threat to the evacuation rate and export efficiency of the evacuees. How to optimize the crowd's guidance after taking these effects is an important issue. Based on the advanced micro-pedestrian...
With the cost of modern weapons, equipment procurement use and security (OSS) increasing, economic affordability becomes an unavoidable problem. Aerospace, defense departments, the services and other industries increasingly unable to afford such a huge financial even material resources and manpower cost. Based on the equipment maintenance cost estimation on the study, this paper focuses on the costs...
Production system is a highly complex, discrete event dynamic system, so it is difficult to build mathematic model of it, and simulation has become one of good method for studying it. Flexsim, which has been widely used in manufacturing, logistics, transportation, service system and so on, is a DEDS simulation software based on Object-oriented idea. UML is a object-oriented modeling language, which...
Vectorless power grid verification is a powerful technique to validate the robustness of the on-chip power distribution network for all possible current waveforms. Formulated and solved as linear programming problems, vectorless power grid verification demands intensive computational power due to the large number of nodes in modern power grids. Previous work showed that the performance bottleneck...
This paper considers Allinpay & Open-union as the potential entrant bank card organizations, and builds two Game models which are Cournot model and Stackelberg model to analyze the asymmetrical competition between Union Pay and Allinpay & Open-union. From the analysis, this paper gives follow conclusions: (1) The first-mover advantage makes Union Pay to decide the equilibrium output and gain...
A method of reverse logistics network design, which is based on operation research method(i.e. set covering location model and mix-integer linear programming) and DEDS simulation method, is proposed in the paper. And take some home appliance product company which is located in Sichuan, china for example, Its reverse logistics network for television remanufacturing in Sichuan is established and optimized...
Vectorless power grid verification makes it possible to evaluate worst-case voltage drops without enumerating possible current waveforms. Under linear current constraints, the vectorless power grid verification problem can be formulated and solved as a linear programming (LP) problem. However, previous approaches suffer from long runtime due to the large problem size. In this paper, we design the...
Supply chain performance influencing path analysis is an important problem with strategic meaning in the automotive supply chain of China. Currently, the complexity of the automotive products makes the supplier management difficult in the automotive industry. In this case, researching on the relationship of supply chain performance factors and finding the solutions become a good way to improve the...
The operation process for a class of manufacturing system in reverse logistics environment is considered. A manufacturing system is designed based on an existing framework for remanufacturing system. In this system, according to retailer / customer's demands, the manufacturer has two alternatives for manufacturing: either ordering the required parts to external suppliers or overhauling returned products...
The port transport facilities are always the bottleneck in a Container terminal logistics system. A simulation model of the system based on Witness is developed. The opportunity of purchasing new crane and updating IC toll-gate is studied, when the throughput and stochastic distributing rule is fixed. The improve scheme and evaluating indicator is put forward. Four simulation situations are designed...
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