在考虑系统噪声和网络诱导延时大于一个采样周期的情况下，给出了多包传输的网络控制系统模型。
The model of NCS with multiple-packet transmission is presented considering system noise and network-induced delay longer than one sampling period.
其次，在考虑系统噪声和延时可以大于一个采样周期的情况下，提出了单包传输和多包传输的网络控制系统的模型。
Secondly, the model of NCS with single-packet and multiple-packet transmission under considering system noise and network-induced delay longer than one sampling are proposed.
分析发现，合法流量和包含攻击包流量采样在功率谱密度上存在显著差异。
With its attacking traffic pattern, obvious difference was found between the power spectrum density (PSD) of legitimate and attack traffic samples.
数据包采样方法是提升数据包处理能力很好的方法，在网络流量监测分析中得到了广泛应用。
Packet sampling which was widely used in network monitoring is a good method to upgrade data packet processing capacity.
针对不存在丢包和存在丢包的情况，通过由采样周期、被控对象与模型参数构造的稳定性判别矩阵给出了使网络控制系统渐近稳定的充分条件。
By constructing a test matrix in terms of the sampling period, the plant controlled and the model parameters, we give a sufficient condition to test the asymptotic stability for the system.
针对不存在丢包和存在丢包的情况，通过由采样周期、被控对象与模型参数构造的稳定性判别矩阵给出了使网络控制系统渐近稳定的充分条件。
By constructing a test matrix in terms of the sampling period, the plant controlled and the model parameters, we give a sufficient condition to test the asymptotic stability for the system.
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