Transmission and Communication of Risk Information in Disaster Emergency Network System
Wei Wang, Chao Zhou · Zhongguo anquan kexue xuebao · 2010
In order to discuss the principle of risk transmission and its blocking measures,based on systemic theory and information theory,the risk transitivity caused by the relevance of system elements and the nonlinear characteristic of information perception is analyzed through regarding the disaster emergency management system as a complex one.The analysis results show that the risk transitivity mainly exists in the immature system of disaster emergency management,which lacks information and emergency knowledge.The structure of risk transmission can be classified into such 4 kinds as relationship type,hierarchic type,tree type and network type.Finally the information loss in the transfer process is studied by using information entropy,and the fact that the risk communication can cut off the link of risk transfer is pointed out.