移动机会社会网络(MOSN)是移动机会网络和在线社会网络相融合的一种新型自组织网络，是未来普适计算的重要网络基础，已成为自组织网络领域的前沿研究方向。MOSN中用户能自由扩散正确信息(正信息)和虚假信息(负信息)，而负信息对MOSN应用造成极大威胁，特别是语义对立的正负信息耦合扩散的最优控制已成为亟待解决的科学问题。本课题拟采用系统动力学方法和最优控制理论，以正负信息耦合扩散的互作用关系为切入点，综合用户信息认知心理和扩散行为的相互影响，建立正负信息耦合扩散的动力学模型，揭示正负信息耦合扩散机理；提出多策略协同控制机制，以系统控制效用最大化为目标，建立控制费用和时间约束下的最优控制系统，提出最优控制方案的存在性和唯一性分析理论与求解方法；设计分布式控制高效算法，实现MOSN中正负信息耦合扩散的最优控制；为MOSN中信息扩散的安全性和可控性提供理论基础和技术支撑，具有重要研究意义和应用前景。

Mobile Opportunistic Social Network (MOSN), as a newly-emerging ad-hoc network that integrates mobile opportunistic network and online social network, is an important network foundation for pervasive computing in the future. Thus, it has been a leading research direction in the field of ad-hoc networks. In MOSNs, users could randomly diffuse positive and negative information. However, the negative information has great threats for MOSNs applications. Particularly, the optimal control about coupling diffusion of both positive and negative information with opposite semantics in MOSNs has been an urgent scientific issue to be addressed. Starting with interrelationships of positive and negative information coupling diffusion, this project intends to adopt system dynamics and optimal control methodologies for establishing the dynamics model of positive and negative information coupling diffusion, and discovering the fundamental mechanisms of positive and negative information coupling diffusion process by considering interactive effects between users' psychology and their behavior. Aiming to maximize the system control utility, this project plans to propose a multi-strategy collaborative control mechanism to establish the optimal control system of positive and negative information coupling diffusion. In addition, the analysis theory on the existence and uniqueness of the optimal control strategies and the corresponding solutions are put forward. Finally, an efficient distributed algorithm for deploying the optimal control strategies is devised. By conducting this research, this project will provide a novel theory and technology for the security and controllability of information diffusion in MOSNs. Therefore, this research will have great research importance and wide applications in future MOSNs.