提出了一种基于接触概率的机会网络低时延休眠调度算法—LDSCP(an Low Delay Sleep Scheduling Algorithm base on Contact Probability for Opportunistic Networks).算法通过精准预测机制向前后预测错失相遇的下次唤醒时间,保证了预...提出了一种基于接触概率的机会网络低时延休眠调度算法—LDSCP(an Low Delay Sleep Scheduling Algorithm base on Contact Probability for Opportunistic Networks).算法通过精准预测机制向前后预测错失相遇的下次唤醒时间,保证了预测下次相遇的准确度,而且对重叠后的时间采用相遇概率最大化机制来提高相遇机会,减小消息投递时延.理论分析验证了LDSCP算法设计的有效性,仿真结果表明,LDSCP算法在消息投递成功率、消息平均时延和消息平均传输跳数等方面的性能均优于WS算法和Epidemic路由算法.展开更多
A probabilistic method based on principle of maximum entropy was employed to analyze the randomness of contact force between geomembrane and granular material.The contact force distribution is exponential according to...A probabilistic method based on principle of maximum entropy was employed to analyze the randomness of contact force between geomembrane and granular material.The contact force distribution is exponential according to the proposed method and the grain size is the most important factor that affects the distribution of contact force.The proposed method is then verified by a series of laboratory experiments using glass beads and cobbles as granular material and a very thin pressure,indicating that film is firstly used in these experiments which give a reliable method to measure the contact force at each contact point.展开更多
文摘提出了一种基于接触概率的机会网络低时延休眠调度算法—LDSCP(an Low Delay Sleep Scheduling Algorithm base on Contact Probability for Opportunistic Networks).算法通过精准预测机制向前后预测错失相遇的下次唤醒时间,保证了预测下次相遇的准确度,而且对重叠后的时间采用相遇概率最大化机制来提高相遇机会,减小消息投递时延.理论分析验证了LDSCP算法设计的有效性,仿真结果表明,LDSCP算法在消息投递成功率、消息平均时延和消息平均传输跳数等方面的性能均优于WS算法和Epidemic路由算法.
基金Project(51079047)supported by the National Natural Science Foundation of ChinaProject Funded by the Priority Academic Program of Jiangsu Higher Education Institutions,China
文摘A probabilistic method based on principle of maximum entropy was employed to analyze the randomness of contact force between geomembrane and granular material.The contact force distribution is exponential according to the proposed method and the grain size is the most important factor that affects the distribution of contact force.The proposed method is then verified by a series of laboratory experiments using glass beads and cobbles as granular material and a very thin pressure,indicating that film is firstly used in these experiments which give a reliable method to measure the contact force at each contact point.
