中文摘要：

随着移动设备上集成的传感器件的增多及其数据处理能力的增强，一种新的感知模式一”参与感知”应运而生，其主要应用领域与环境监测和公共卫生相关，它强调人在感知过程中发挥的作用．提出一种基于位置的参与感知系统架构，主要目的是通过分析位置信息调度在目标区域的移动设备完成感知任务．该文首先设计了基于上下文感知的定位算法，在尽可能节省能量的前提下，实现了室内室外、Wi—Fi与GPS定位的无缝切换，然后设计了实名制机制和可信度机制来提高系统数据的可靠性，设计好友排名机制来激励用户参与，并通过记录用户的历史数据采用基于TF．IDF算法的方法动态地为用户添加标签并分组．在完成系统总体设计、服务器、客户端的设计之后，实现了一种基于参与感知的校园信息共享系统验证了基于位置的参与感知系统架构的有效性．

英文摘要：

Along with the development of the technology, mobile devices are equipped with a growing number of sensors and are in- creasingly capable of capturing and processing data. The sensed data gathered from these devices forms the basis of an emerging para- digm in sensing systems called Participatory Sensing, which focuses on public health and environment-related area and emphasizes the impact of human in sensing process. This paper proposed a framework of location-based participatory sensing system which tasks de- ployed mobile devices to gather information of place of interest. We develop a context-aware localization mechanism, which switches smoothly between indoor localization and outdoor localization, to get user＇s location while saving energy. We also develop a real- name registration mechanism and reliability mechanism to intensify the data quality and develop friend-ranking mechanism to encour- age users＇ participation. Furthermore, we automatically categorize users into different types by analyzing user＇s historical behaviors. With the system framework, we implemented a campus information sharing system based on participatory sensing, called I-Sensing, which demonstrates the feasibility of the framework.