弹性系数视角下风险耦合特性的仿真分析

风险耦合导致风险发生非线性演化,从而给风险的定量评估带来困难。为给出风险耦合控制的有效对策,基于弹性系数视角界定风险耦合弹性系数概念,以此实现对风险耦合强度的定量测度;基于装备研制项目设计论证环节,从风险测度指标节点裕度角度,采用Arena软件仿真分析单指标和全指标在线性和非线性耦合关系下的系统风险熵和后传风险熵的变化情况。结果表明,全指标非线性耦合会显著改变系统性能,而单指标非线性耦合和全指标线性耦合次之,欲实现风险耦合控制应极力制止全局性的非线性耦合关系。     

Modelling and optimisation of a product recovery network

An appropriate logistics network is an important element of the infrastructure of any product recovery company. Small and medium enterprises (SMEs) constitute a major fraction of the product recovery industry with a different business objective and scale of operation from those of original equipment manufacturers. This paper addresses the network design issues for SMEs involved in product recovery activities. A mathematical formulation is presented in an SME context and a subsequent simulation model is developed. A genetic algorithm approach is presented for optimising the network for a single product scenario.