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中文摘要：
为分布式视频点播（videoondemand，VOD）接入控制建立了基于POMDP（部分可观Markov决策过程）的数学模型，应用策略梯度优化算法仿真求解模型的最优策略．仿真结果表明，基于POMDP模型的仿真有效地缩短了仿真时间；与传统分布式系统的接入控制方法相比，更合理地利用了系统的资源，可以给运营商带来更大的效益．
英文摘要：
A POMDP （partially observable Markov decision process）-based admission control model was proposed for distributed VOD admission control system, and the optimal admission policy was obtained by applying the policy-gradient approach through computer simulation. Simulation results show that model- based simulation can save much more running time compared to system-based simulation. Meanwhile, the policy can make hetter use of the resources and provide more benefits to the providers than the traditional admission policy of distributed system.
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