The closed-loop system differs from the open-loop system by()
A、A.the lack of a feedback
B、B.the presence of a feed back
C、C.the lack of a computer
D、D.the presence of a computer
A、A.the lack of a feedback
B、B.the presence of a feed back
C、C.the lack of a computer
D、D.the presence of a computer
A、Single-antenna port B、Transmit diversity&spatial multiplexing C、Open-loop&Closed-loop spatial multiplexing D、Multi-user MIMO
A、Cell Open-loop Spatial Multiplexing UsedIndicator B、Transmit Diversity Indicatorfor Common Channel C、Celltransmit Diversity UsedIndicator D、Cell Closed-loop Spatial Multiplexing UsedIndicator
A、a manual closed loop B、a manual opened loop C、an automatic closed loop D、an automatic opened loop
A、a closed loop control system B、an open loop control system C、a boiler control system D、a steering gear
A、a closed loop control system B、an open loop control system C、a boiler control system D、a steering gear control system
A、Routing loops, hold down timers B、Switching loops, split horizon C、Routing loops, split horizon D、Switching loops, VTP E、Routing loops, STP F、Switching loops, STP
A、close Fan and Humidifier at the same time B、firstly close Fan and then close humidifier immediately C、firstly close humidifier and then close Fan immediately D、firstly close humidifier and then close Fan after 30 seconds