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基于指数随机图模型的应急协作网络形成机制研究——以郑州“7.20”特大暴雨为例
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作者 丁会彤 《社会科学前沿》 2024年第1期95-104,共10页
为应对复杂多变的灾害情境下,所有行动者在一定的规则和机制下建立跨主体、跨层级和跨领域的应急协作网络,探讨其形成机制有助于深入理解行动者行为逻辑,从而优化网络。本文以郑州暴雨为实证研究对象,采用网络数据进行事件分析,基于指... 为应对复杂多变的灾害情境下,所有行动者在一定的规则和机制下建立跨主体、跨层级和跨领域的应急协作网络,探讨其形成机制有助于深入理解行动者行为逻辑,从而优化网络。本文以郑州暴雨为实证研究对象,采用网络数据进行事件分析,基于指数随机图模型探究政府组织间、政府组织与非政府组织间关系和网络形成规则。研究发现,存在隶属关系的地方政府部门合作紧密,中介组织在政府与非政府组织联系中发挥重要作用。因此,在突发暴雨灾害应对过程中,应明确纵向和横向部门权责划分、发挥枢纽组织影响力,进一步发挥协作网络在应急管理中的优势。 展开更多
关键词 应急协作网络 指数随机图模型 突发自然灾害 网络形成演化机制 社会网络分析
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贸易网络综合演化模型的研究 被引量:6
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作者 胡平 刘志华 王炳清 《复杂系统与复杂性科学》 EI CSCD 北大核心 2012年第2期52-61,共10页
根据实地调查结果启示,在综合节点适应度择优连接、节点删除、边的重建与删除的基础上建立了有向加权网络演化综合模型,并对其进行了解析推导,主要以入强度分布指数为研究对象,在节点适应度同质、服从[0,1]分布及服从指数分布时分别进... 根据实地调查结果启示,在综合节点适应度择优连接、节点删除、边的重建与删除的基础上建立了有向加权网络演化综合模型,并对其进行了解析推导,主要以入强度分布指数为研究对象,在节点适应度同质、服从[0,1]分布及服从指数分布时分别进行模型验证。最后分析多种演化机制对于幂律指数的影响,并通过数值仿真分析进行验证。 展开更多
关键词 有向加权网络 择优连接 节点概率删除 网络演化机制
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互联电力网络复杂性研究的若干新进展 被引量:8
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作者 梅生伟 倪向萍 《长沙理工大学学报(自然科学版)》 CAS 2008年第2期1-8,共8页
以复杂网络理论为先导,综述了清华大学电机系近两年的研究成果.针对静态电力网络,提出了分解与协调算法和输电线路脆弱度评估算法;针对动态电力网络,提出了简化与等值算法和同步化控制算法.同时提出了网络生长与演化模型,研究了电力网... 以复杂网络理论为先导,综述了清华大学电机系近两年的研究成果.针对静态电力网络,提出了分解与协调算法和输电线路脆弱度评估算法;针对动态电力网络,提出了简化与等值算法和同步化控制算法.同时提出了网络生长与演化模型,研究了电力网络的生长机制问题. 展开更多
关键词 复杂电力网络 分解与协调 脆弱性评估 简化与等值 同步化控制 网络生长与演化机制
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Research on Public Opinion Transmission and Evolution Mechanism in Network
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作者 Zhang Fangyuan 《International English Education Research》 2014年第2期35-38,共4页
As the Internet continues to expand, the influence of network information on real life has gradually deepened. Research on propagation and evolution of Internet public opinion has become a hot topic. The force of inte... As the Internet continues to expand, the influence of network information on real life has gradually deepened. Research on propagation and evolution of Internet public opinion has become a hot topic. The force of intemet public opinion penetrates and influences on every aspect of the society. Compared with traditional public opinion, the network public opinion has features of immediate, multivariate and interactive, the propagation behavior has the new change compared with the traditional public opinion. In the propagation behavior of network public opinion, agenda setting is no longer an arbitrary, the influence of opinion leaders in the agenda setting becomes more and more complex and diversified. The formation time of network public opinion is short, and social influence becomes strong. Guide the public opinion to build a harmonious environment of network public opinion. Overall, our country' s network public opinion environment is a benign situation and steadily promoting the reforms of public policies. Although there is still a few not rational voices full of them, the network public opinion shows a general trend of positive thinking. Based on this philosophy, through the research of network public opinion dissemination and evolution mechanism, can be all-round good guidance and supervision of public opinion, building a harmonious network environment of public opinion. 展开更多
关键词 network public opinion propagation of intemet public opinion evolution of intemet public opinion
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A novel weighted evolving network model based on clique overlapping growth
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作者 杨旭华 王波 孙豹 《Journal of Central South University》 SCIE EI CAS 2010年第4期830-835,共6页
A novel weighted evolving network model based on the clique overlapping growth was proposed.The model shows different network characteristics under two different selection mechanisms that are preferential selection an... A novel weighted evolving network model based on the clique overlapping growth was proposed.The model shows different network characteristics under two different selection mechanisms that are preferential selection and random selection.On the basis of mean-field theory,this model under the two different selection mechanisms was analyzed.The analytic equations of distributions of the number of cliques that a vertex joins and the vertex strength of the model were given.It is proved that both distributions follow the scale-free power-law distribution in preferential selection mechanism and the exponential distribution in random selection mechanism,respectively.The analytic expressions of exponents of corresponding distributions were obtained.The agreement between the simulations and analytical results indicates the validity of the theoretical analysis.Finally,three real transport bus networks(BTNs) of Beijing,Shanghai and Hangzhou in China were studied.By analyzing their network properties,it is discovered that these real BTNs belong to a kind of weighted evolving network model with clique overlapping growth and random selection mechanism that was proposed in this context. 展开更多
关键词 weighted network clique overlapping mean-field theory bus transport network
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