Based on the time-variant double layers & plane valley electron density profile, the theoretical analysis of narrow-beam channel characteristics is conducted.

并基于一种时变双层平谷电子密度模式对窄波束信道特性进行了理论分析。

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The main-steam temperature with characteristics of nonlinear and time-variant of long dead time are often affected by many measurable and immeasurable disturbances in operation.

火电厂主汽温被控对象具有大迟延、非线性时变的特性，且在实际运行中存在诸多可测与不可测的扰动。

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Considering the time-variant mesh stiffness when the gears transmitting, the vibration characteristics were compared between gears with symmetric teeth and with asymmetric teeth.

针对齿轮传动的时变刚度特点，比较了标准齿轮与非对称齿轮的振动特性。

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