中文摘要：

网络社会下，基于新媒体的政府公共信息服务方式及功能不断完善，参与诉求逐渐增强的公众得以主动参与公共事务管理，与政府的交流互动日益频繁。本文以厦门警方通过新浪微博平台征集案件线索为例．深入分析警方的信息公开和公众的网络参与行为，研究政府与公众在网络空间中的互动关系特征。研究发现，公众参与与警方信息发布的主体、内容、方式和参与转发的关键用户相关，少数关键节点控制着信息传播的方向和参与群体，拥有较大的影响力；不同类型的警方微博账户与公众的互动方式不同，机构账户呈“点对面”型，个人账户与公众的“点对点”型互动较多。基于主体间合作与冲突并存的现状，提出网络空间中政府与公众的互动策略。

英文摘要：

In the network society, the function of government public information service based on new media is continuously improved. The public whose participation demands have been enhanced initiatively participate in public affairs management, which makes the interactions with government become more and more frequent. This paper analyzes the behaviors of police information publication and the public participation, and studies the traits of the interaction between government and the public in the context of Xiamen police solving a criminal case by Sina Microblog platform. The results show that the public participation is related to the releaser, the content, releasing methods and key users who retweet the microblog messages posted by police, and a small number of critical users control the information dissemination direction and participation group, thus they have greater influence. The interaction with the public on the part of the police department itself and individual police officer varied widely and produced widely varying results. The interaction between police department with the public could be regarded as node-to-surface （N-S） type, while the node- to-node （N-N） type interaction between individual police officer and the public is more common. Based on the status quo of the coexistence of the conflict and cooperation between the subjectivities, some strategies for the interaction between government and the public in cyberspace have been put forward.