为表达过程时变的特点，引入时间参数作为神经网络的一个输入量。

The time parameter is also imported into the neural network to give the time-varying characteristic of the process.

youdao

对于无线通信系统，无线信道不仅是频率选择性的，而且是时变的。

However, for the wireless mobile communication systems, the radio channel is frequency selective and time-varying.

youdao

它可以是时不变的或时变的、因果的或非因果的、线性的或非线性的。

It can be time-invariant or time variant, causal or non causal, linear or nonlinear.

youdao

These conditions permitted a development of institutions and habits needed for freedom, even as they also made Europe vulnerable to conquests and to extinction, and Europe was almost extinguished practically before there was a Europe; very early in its history.

这些恰恰是自由的形成和发展,需要的的制度和特征,尽管这也使欧洲,在外敌入侵时变的不堪一击,实际上,在它早期的历史中,欧洲在尚未形成前就差点消失

耶鲁公开课 - 古希腊历史简介课程节选