为了改善多媒体数据的传输效率和系统执行度,降低多媒体服务的运营成本,从多媒体系统群体行为的分析模型和演化出发,研究了一种基于雾计算的智能激励机制。首先,从单一化、分散部署与冗余健壮特征和自主管理的群体特质出发,为分布式多...为了改善多媒体数据的传输效率和系统执行度,降低多媒体服务的运营成本,从多媒体系统群体行为的分析模型和演化出发,研究了一种基于雾计算的智能激励机制。首先,从单一化、分散部署与冗余健壮特征和自主管理的群体特质出发,为分布式多媒体系统建立群体行为分析演化模型,并给出了多媒体系统进行群体行为分析的演化算法。接着,根据获取的最大化系统效用,通过自组织和主动演化来调度雾服务器节点。以优化个体服务策略为目标,雾计算结合演化进程控制群体行为参与度。在此基础上,雾服务器节点逐步更新个体调度,并实时统计系统拓扑调度效应。仿真实验基于Matlab的网络控制系统仿真平台,部署了多媒体系统。通过Matlab仿真了分布式多媒体系统的拓扑与无线传输,结合C语言实现提出的EMSSB(Evolution algorithm of Multimedia Systems Swarming Behavior)算法和IIFS(Intelligent Incentive algorithm with Fog computing and Swarming Behavior)算法。仿真实验的数据均为100次重复时延的平均值。每次重复实验中,除了将用户发出多媒体请求的时间和次数设置为随机,其他参数均保持一致。仿真结果表明,所提激励算法在多媒体数据传输的实时性、雾节点激励有效性和用户请求响应等方面表现良好。所提激励算法可以将端到端时延缩短45%,有效控制参与度,并根据用户请求数控制不同的参与比例,此外可以将用户响应时延和多媒体数据流传输延迟分别缩短53%和45%。展开更多
Swarming behavior facilitates pair formation,and therefore mating,in many eusocial termites.However,the physiological adjustments and morphological transformations of the flight muscles involved in flying and flightle...Swarming behavior facilitates pair formation,and therefore mating,in many eusocial termites.However,the physiological adjustments and morphological transformations of the flight muscles involved in flying and flightless insect forms are still unclear.Here,we found that the dispersal flight of the eusocial termite Reticulitermes chinensis Snyder led to a gradual decrease in adenosine triphosphate supply from oxidative phospho・rylation,as well as a reduction in the activities of critical mitochondrial respiratory enzymes from preflight to dealation.Correspondingly,using three-dimensional reconstruction and transmission electron microscopy(TEM),the flight muscles were found to be gradually deteriorated during this process.In particular,two tergo-pleural muscles(IItpm5 and IIItpm5)necessary to adjust the rotation of wings for wing shedding behavior were present only in flying alates.These findings suggest that flight muscle systems vary in function and morphology to facilitate the swarming flight procedure,which sheds light on the important role of swarming in successful extension and fecundity of eusocial termites.展开更多
文摘为了改善多媒体数据的传输效率和系统执行度,降低多媒体服务的运营成本,从多媒体系统群体行为的分析模型和演化出发,研究了一种基于雾计算的智能激励机制。首先,从单一化、分散部署与冗余健壮特征和自主管理的群体特质出发,为分布式多媒体系统建立群体行为分析演化模型,并给出了多媒体系统进行群体行为分析的演化算法。接着,根据获取的最大化系统效用,通过自组织和主动演化来调度雾服务器节点。以优化个体服务策略为目标,雾计算结合演化进程控制群体行为参与度。在此基础上,雾服务器节点逐步更新个体调度,并实时统计系统拓扑调度效应。仿真实验基于Matlab的网络控制系统仿真平台,部署了多媒体系统。通过Matlab仿真了分布式多媒体系统的拓扑与无线传输,结合C语言实现提出的EMSSB(Evolution algorithm of Multimedia Systems Swarming Behavior)算法和IIFS(Intelligent Incentive algorithm with Fog computing and Swarming Behavior)算法。仿真实验的数据均为100次重复时延的平均值。每次重复实验中,除了将用户发出多媒体请求的时间和次数设置为随机,其他参数均保持一致。仿真结果表明,所提激励算法在多媒体数据传输的实时性、雾节点激励有效性和用户请求响应等方面表现良好。所提激励算法可以将端到端时延缩短45%,有效控制参与度,并根据用户请求数控制不同的参与比例,此外可以将用户响应时延和多媒体数据流传输延迟分别缩短53%和45%。
基金by the National Natural Science Foundation of China(31772516 and 31501634)was funded by the Key Foreign Cooperation Projects of the Bureau of International Cooperation of Chinese Academy of Sciences(152111KYSB20160067).
文摘Swarming behavior facilitates pair formation,and therefore mating,in many eusocial termites.However,the physiological adjustments and morphological transformations of the flight muscles involved in flying and flightless insect forms are still unclear.Here,we found that the dispersal flight of the eusocial termite Reticulitermes chinensis Snyder led to a gradual decrease in adenosine triphosphate supply from oxidative phospho・rylation,as well as a reduction in the activities of critical mitochondrial respiratory enzymes from preflight to dealation.Correspondingly,using three-dimensional reconstruction and transmission electron microscopy(TEM),the flight muscles were found to be gradually deteriorated during this process.In particular,two tergo-pleural muscles(IItpm5 and IIItpm5)necessary to adjust the rotation of wings for wing shedding behavior were present only in flying alates.These findings suggest that flight muscle systems vary in function and morphology to facilitate the swarming flight procedure,which sheds light on the important role of swarming in successful extension and fecundity of eusocial termites.
