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Exact Solution of the Gyration Radius of an Individual's Trajectory for a Simplified Human Regular Mobility Model 被引量:6
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作者 YAN Xiao-Yong han xiao-pu +1 位作者 ZHOU Tao WANG Bing-Hong 《Chinese Physics Letters》 SCIE CAS CSCD 2011年第12期63-66,共4页
We propose a simplified human regular mobility model to simulate an individual's daily travel with three sequential activities:commuting to workplace,going to do leisure activities and returning home.With the assu... We propose a simplified human regular mobility model to simulate an individual's daily travel with three sequential activities:commuting to workplace,going to do leisure activities and returning home.With the assumption that the individual has a constant travel speed and inferior limit of time at home and in work,we prove that the daily moving area of an individual is an ellipse,and finally obtain an exact solution of the gyration radius.The analytical solution captures the empirical observation well. 展开更多
关键词 REGULAR simplified finally
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Statistical Property and Model for the Inter-Event Time of Terrorism Attacks 被引量:6
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作者 ZHU Jun-Fang han xiao-pu WANG Bing-Hong 《Chinese Physics Letters》 SCIE CAS CSCD 2010年第6期273-276,共4页
The inter-event time of terrorism attack events is investigated by empirical data and model analysis. Empirical evidence shows that it follows a scale-free property. In order to understand the dynamic mechanism of suc... The inter-event time of terrorism attack events is investigated by empirical data and model analysis. Empirical evidence shows that it follows a scale-free property. In order to understand the dynamic mechanism of such a statistical feature, an opinion dynamic model with a memory effect is proposed on a two-dimensional lattice network. The model mainly highlights the role of individual social conformity and self-affirmation psychology. An attack event occurs when the order parameter indicating the strength of public opposition opinion is smaller than a critical value. Ultimately, the model can reproduce the same statistical property as the empirical data and gives a good understanding for the possible dynamic mechanism of terrorism attacks. 展开更多
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