中文摘要：

虚拟社区中有关突发事件的知识共享是应急管理决策信息的重要来源。论文基于社会认知和社会资本理论，面向突发事件特征，采用问卷调查的实证方式运用两阶段验证性因子分析方法构建了面向突发事件的知识共享影响因素结构方程模型。经过AMOS数据分析和信度效度检验证明模型与数据的适配度良好。研究结果表明，突发事件的周期性，类型。社区回报期望等因素对于虚拟社区中突发事件知识共享行为的质量和数量均起到显著的正向推动作用．同时首次研究了知识共享质量和数量间的反向影响作用。最后结合这一研究结果给出了本研究的实践价值。

英文摘要：

Knowledge sharing on emergency events in virtual communities has become an important platform for people＇s understanding of insider knowledge and the government＇ s understanding of public opinion; meanwhile, it is also a significant decision information source for emergency management. Based on social cognitive theory and social capital theory, towards the emergency event characteristics, the paper employs questionnaire survey empirical means and two-stage confirmatory factor analysis method which contains measurement model and structural model to construct a structural equation model for influential factors research of emergency event knowledge sharing. 16 hypotheses are proposed cautiously according to social cognitive theory and social capital theory. Through questionnaire data analysis by AMOS with related reliability, validity tests and fitting indexes analysis, it proves that the model proposed fits well with the questionnaire data. The study shows that the emergency event characteristics of cycling time, type together with community outcome expectation have a significant and positive effect on both knowledge sharing quality and quantity. The study also indicates that the quality and quantity exert negative effects onto each other. Finally, the paper discusses the practical value of the research.