Alibaba has never requested the SAIC to delay the publication of any report, said Mr Tsai, who described the July meeting with the SAIC as routine. 阿里巴巴并没有要求工商总局延迟公布任何报告,蔡崇信表示。他形容去年7月与工商总局的会议是例行的。
It is hard to control the non-linear object which has large delay and difficulty in establishing exact model by using routine PID. 采用常规PID控制很难实现对大滞后、非线性等难以建立精确数学模型的被控对象的良好控制。
The temperature control of the thermocouple calibrated furnace has such characters as large time delay and time varying etc. When temperature variety is great, the routine PID has difficult to gain parameter, and it will make the system has long adjust time. 热电偶检定炉的温度控制具有大滞后、时变性等特点,常规的PID控制在温度变化较大时,参数整定困难,且调节时间过长。