The round-trip time delay of different distance, time and packet size is gathered to obtain a statistical model of Internet communication line. Results of the data show the round-trip time delay of Internet approximately belongs to one of the exponent, al, normal or logarithm-normal distribution.

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For the WiNCS based on the IEEE 802.15.4/Zigbee communication protocols stack, the different time delay components of the total round-trip time delay in this WiNCS are identified. The experimental studies on a WiNCS prototype testbed are used to analyze the impact of the various factors on the total round-trip time delay.

分析了利用IEEE 802.15.4／Zigbee通訊協(xié)議所實(shí)現(xiàn)無(wú)線網(wǎng)絡(luò)控制系統(tǒng)中延時(shí)的組成黄色网址在线免费，在此基礎(chǔ)上，以實(shí)驗(yàn)手段探討了不同網(wǎng)絡(luò)因素對(duì)網(wǎng)絡(luò)控制系統(tǒng)延時(shí)的影響美女网站免费黄。

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Xie Juezai transferred ancient topics of "running routine by one s own" and " asking others to work " into modern language fitting the context of time and environment as routinism and bureaucratism, at the same time, he combined the idea closely with the leadership style of that time, so to reflect and develop political and legal tradition systematically with reality.

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The first time, I sent a sampan to rescue you, you do not, I think you are worried about the risk sampan; the second time, I sent a speedboat to go, you do not ; the second time, I question your guests ritual, send a helicopter to rescue you, you are unwilling to accept the results.

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First, the problem of choosing sample time in the discretized variable structure control of continuous-time systems is analyzed, then direct design methods of variable structure for discrete-time systems are discussed.

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In order to realize real-time control, the paper studied two kinds of closed-loop control structures such as based on scalar quantity and double closed-loop control structure, moreover established their control structure, then simulation to the double closed-loop control structure of voltage source type matrix converter. The simulation results indicate that reach the real-time control requests, the system dynamic response performance is good, the converter input output can be adjusted in the short time.

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