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A new approach to model and analyze closed loop supply chain system is proposed based on Petri net theory. The approach proposed consists of two stages. In the first stage, the closed loop supply chain is modeled as a stochastic fuzzy Petri net model with conventional stochastic Petri nets in which the transition firing rates are characterized as fuzzy variables. In order to obtain the reachablility...
We study an inventory system in which a doctor provides service for two patient types over a main surgery day of T periods. As the horizon starts, patient demands arrive in each period, for either type of patients, following a stationary Poisson process with random service time. The model we consider is the doctor may choose to provide service on that main surgery day, or may choose to next main surgery...
A supercritical CO2 (SC- CO2) dyeing equipment together with computer control system is designed, and the structure analysis function of ANSYS software is used to analyzed static stress of master parts and multiphase flow of the equipment in order to confirm the concentration area of all kinds of component stress. The model is built, by which the velocity vector distribution chart and pressure distribution...
The structure composition of the Machine Gun Remotely-Operated Weapon Stations servo control system was analyzed, and servo system was simplified and model was assumed. The virtual prototype model was set up by means of ADAMS software package, and servo system model was built based on ADAMS and MATLAB/Simulink; Simulation analysis for tracing precision was conducted in the process of firing, tracing...
Trust negotiation (TN) is an approach to establish trust relationship between strangers by disclosing iteratively credentials and access control policies. In open and distributed environment TN brings convenience in resource share, while it still has some shortcomings, such as easy to fail in negotiation, difficult to track userspsila deed and so on.... Security log provides a method to analyze the...
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