But distilling tower temperature control is a typic big time-lag system, and the control of it is always a difficult problem in coak producing industry.
但由于氨塔温度控制属于典型的大时滞系统，对这种系统的自动控制一直是焦化生产控制中的一个难题。
The grain drying system is one big time lag and strong nonlinear system with much interference.
粮食烘干系统是一个大时滞、多干扰的强非线性系统。
Because macroeconomic system is a big complicated system and it exists nonlinear, time lag and time change, it is difficult to establish a applied macroeconomic model.
由于宏观经济系统是一个大型复杂系统，存在着非线性、时滞和时变，因此建立一个实用的宏观经济模型并不容易。
应用推荐