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| 1 | Modeling and Analysis for Streaming Service Systems显示文摘The proliferation of streaming service system in various application areas gains increasing importance and also poses more challenges in the research of streaming service system. In this paper, we propose a novel dynamic model composed of a set of differential equations to describe the evolution of streaming service systems. And in the model, we focus on how the policies for admission control and peer selection influence on the system. We first introduce a flexible abstraction of streaming service systems. The abstraction is generally enough to capture the essences of streaming service systems with different structures, physical characteristics,software protocols and client behaviors. Then, by analyzing the state which is defined as the number of requests, a novel dynamic model is developed in microscopic scale to characterize the behaviors of streaming service systems. The model proposed in this paper demonstrates the interactions between clients and servers and also between different servers. The interactions are primarily influenced by the admission control policy and peer selection policy. Finally, some experiments are designed to verify the validation and reasonability of the model. | Hai-Peng Zhang Bao-Qun Yin Xiao-Nong Lu | 2014 | International Journal of Automation and computing2014，11，4： | 2 |
| 2 | 基于北斗/GPS的网络授时系统设计显示文摘针对电脑主机多采用BIOS内时钟而导致系统时间不精确的问题,提出一种基于北斗/GPS芯片的网络授时系统设计;该系统采用可编程逻辑器件(FPGA)作为主控芯片,接收北斗/GPS双模芯片提供的UTC时间码流,解码并通过网口发送到PC机上作为精准时间;同时多个设备间相互连接,实现多设备之间的数据传输,增强系统的稳定性和可靠性,传输速率可达100 Mbps;实验证明:北斗/GPS接收信号稳定,传输的时间信息准确,北斗/GPS所解时间信息误差不超过80ns,设备与PC机100 Mbps传输速率误差在1~2ms,系统稳定、可靠。 | 季志博 朱可 王军 | 2017 | 计算机测量与控制2017，25，10： | 1 |
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