非时变性 time-invariance property
线性时不变系统理论 LTI system theory ; LZI-System
线性时不变 LTI ; Linear Time Invariant ; linear time
负荷时变性 Load time-variation character
线性时不变系统 LTI ; Linear Time-invariant System ; Linear Time Invariant ; LTI system
负性变时效应 negative chronotropic action
时间变化性 Time Variation
正性变时效应 positive chronotropic action
线性非时变 LTI ; Linear Time Invariant
In all communication channels, underwater acoustic channel is the most complex, and its fading, multipath effect, time-variation effect making many classic communication technologies can not be directly applied to underwater acoustic channel.
水声信道是所有通信信道中最为复杂的信道之一,其衰落、多径效应、时变性等特点使得许多经典的通信技术无法直接应用于水声信道。
参考来源 - 水下声扩频通信系统研究Aimed at these properties of the pH value control, including delay, nonlinear, time-varying characteristics and lack of the accurate mathematical model, advanced control algorithms were analyzed. The intelligent controller based on RBF neural network fuzzy PID was designed.
4.针对电厂除盐水的pH值控制具有纯滞后、非线性、时变性等特性,且难以建立精确的数学模型,进一步分析先进控制算法,设计了基于RBF神经网络模糊PID智能控制器。
参考来源 - 除盐水自动加氨控制系统研究·2,447,543篇论文数据，部分数据来源于NoteExpress
由于用电设备的电气参数的时变性，为电能优化带来困难。
It is difficult to optimize the energy because of the electric parameter time-varying property.
这些因素具有复杂的不确定性和时变性，给预测带来很大难度。
These factors have uncertainty and variability by time, and bring large difficulty to forecast.
一旦出现非线性和时变性，经典技术最根本的基础就不复存在了。
When nonlinearities and time variations are present, the very basic for these classical techniques is removed.
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