For the optimal design of a heat exchanger network,the inlet and outlet stream temperatures of each heat exchanger in the network should be known.An explicit analytical solution of stream temperatures of an arbi-trary...For the optimal design of a heat exchanger network,the inlet and outlet stream temperatures of each heat exchanger in the network should be known.An explicit analytical solution of stream temperatures of an arbi-trary connected heat exchanger network was introduced,which is suitable for the thermal calculation of heat ex-changer networks.For the heat exchanger network synthesis,this solution was further developed and coupled with the stage-wise superstructure heat exchanger networks.The new calculation procedure reduced the computer mem-ory requirement dramatically.On the basis of this solution,a mathematical model for synthesis of heat exchanger networks with genetic algorithm was formulated,which is always feasible and no iteration is needed.Two examples were calculated with the proposed approach and better results were obtained.展开更多
目的:探讨PACS系统(Picture Archiving and Communication System)在中小型医院的管理与实际应用。方法:回顾我院PACS最初阶段的运行状况,是对PACS影像数据流实行分步管理:即影像数据的采集和转存。结果:对影像数据流的管理与控制后,使P...目的:探讨PACS系统(Picture Archiving and Communication System)在中小型医院的管理与实际应用。方法:回顾我院PACS最初阶段的运行状况,是对PACS影像数据流实行分步管理:即影像数据的采集和转存。结果:对影像数据流的管理与控制后,使PACS系统能稳定运行。结论:通过对影像数据流的管理与控制是PACS功能有效运行的保证,也是中小型医院在减少投入提高工作效率的有效保证。展开更多
基金Supported by Shanghai Leading Academic Discipline Project (No.T0503)Shanghai Pujiang Program (No.05PJ14078)Ji-angsu Cuilong Copper Industry Co.,Ltd.
文摘For the optimal design of a heat exchanger network,the inlet and outlet stream temperatures of each heat exchanger in the network should be known.An explicit analytical solution of stream temperatures of an arbi-trary connected heat exchanger network was introduced,which is suitable for the thermal calculation of heat ex-changer networks.For the heat exchanger network synthesis,this solution was further developed and coupled with the stage-wise superstructure heat exchanger networks.The new calculation procedure reduced the computer mem-ory requirement dramatically.On the basis of this solution,a mathematical model for synthesis of heat exchanger networks with genetic algorithm was formulated,which is always feasible and no iteration is needed.Two examples were calculated with the proposed approach and better results were obtained.
文摘目的:探讨PACS系统(Picture Archiving and Communication System)在中小型医院的管理与实际应用。方法:回顾我院PACS最初阶段的运行状况,是对PACS影像数据流实行分步管理:即影像数据的采集和转存。结果:对影像数据流的管理与控制后,使PACS系统能稳定运行。结论:通过对影像数据流的管理与控制是PACS功能有效运行的保证,也是中小型医院在减少投入提高工作效率的有效保证。
