For its complexity, engineering construction schedule design is limited by various factors.Simulation-based engineering construction schedule takes critical path method (CPM) network as frame and calls complex cyclic ...For its complexity, engineering construction schedule design is limited by various factors.Simulation-based engineering construction schedule takes critical path method (CPM) network as frame and calls complex cyclic operation network (CYCLONE) simulation model enclosed in advance for its simulation nodes. CYCLONE simulation model takes charge of simulating stochastic duration of activity and efficiency of resources, while CPM model performs project scheduling. This combination avoids the shortcomings of both models. Furthermore, geographic information system (GIS) technique is utilized to visualize the construction processes which are otherwise difficult to be understood by static results described. Application in practical project verifies the feasibility and advantage of the technique.展开更多
The four different schemes of Group Explicit Method (GEM): GER, GEL, SAGE andDAGE have been claimed to be unstable when employed for electrochemical digital simulations withlarge model diffusion coefficient D_M. Howev...The four different schemes of Group Explicit Method (GEM): GER, GEL, SAGE andDAGE have been claimed to be unstable when employed for electrochemical digital simulations withlarge model diffusion coefficient D_M. However, in this investigation, in spite of the conditionalstability of GER and GEL, the SAGE scheme, which is a combination of GEL and GER, was found to beunconditionally stable when used for simulations of electrochemical reaction-diffusions and had aperformance comparable with or even better than the Fast Quasi Explicit Finite Difference Method(FQEFD) in some aspects. Corresponding differential equations of SAGE scheme for digital simulationsof various electrochemical mechanisms with both uniform and exponentially expanded space units wereestablished. The effectiveness of the SAGE method was further demonstrated by the simulations of anEC and a catalytic mechanism with very large homogeneous rate constants.展开更多
基金Supported by National Natural Science Foundation of China( No. 50179023).
文摘For its complexity, engineering construction schedule design is limited by various factors.Simulation-based engineering construction schedule takes critical path method (CPM) network as frame and calls complex cyclic operation network (CYCLONE) simulation model enclosed in advance for its simulation nodes. CYCLONE simulation model takes charge of simulating stochastic duration of activity and efficiency of resources, while CPM model performs project scheduling. This combination avoids the shortcomings of both models. Furthermore, geographic information system (GIS) technique is utilized to visualize the construction processes which are otherwise difficult to be understood by static results described. Application in practical project verifies the feasibility and advantage of the technique.
文摘The four different schemes of Group Explicit Method (GEM): GER, GEL, SAGE andDAGE have been claimed to be unstable when employed for electrochemical digital simulations withlarge model diffusion coefficient D_M. However, in this investigation, in spite of the conditionalstability of GER and GEL, the SAGE scheme, which is a combination of GEL and GER, was found to beunconditionally stable when used for simulations of electrochemical reaction-diffusions and had aperformance comparable with or even better than the Fast Quasi Explicit Finite Difference Method(FQEFD) in some aspects. Corresponding differential equations of SAGE scheme for digital simulationsof various electrochemical mechanisms with both uniform and exponentially expanded space units wereestablished. The effectiveness of the SAGE method was further demonstrated by the simulations of anEC and a catalytic mechanism with very large homogeneous rate constants.
