But the gas collector pressure system is a complex multi-variable non-linear, time-varying, long time-delay control system and is not easy to set up its mathematical model.

但是，集气管压力控制系统是一个多变量、非线性、时变性、大滞后的复杂控制系统，难以建立数学模型。

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By analysing the delay precision of parallel connection delay control system and decision-making delay control system, the choosing principle of the delay time for every delay circuit is given.

本文对并联延时控制系统和决策延时控制系统的延时精度进行分析，给出延时控制系统中各延时电路延时值的选取原则。

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The system under consideration involves state time delay, control input time delay, parameter uncertainties and unknown nonlinear disturbances.

系统包含状态时滞、控制输入时滞、参数不确定性和未知的非线性扰动。

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Atlantic Southeast, which was sold to Skywest Airlines by Delta in 2005 but continues as Delta's connector partner, tends to get short shrift during weather delays by an Air Traffic Control system that would always rather delay flights with relatively fewer people on them.

FORBES: America's Worst Airlines