闭环控制 ( closed loop control)
闭环控制 ( closed loop control)
相关考题：
UE的传输模式包括()A.Single-antennaportB.Transmitdiversity&spatialmultiplexingC.Open-loop&Closed-loopspatialmultiplexingD.Multi-userMIMO
UE的传输模式包括：( )A.Single-antennaport：port0、port5B.Transmitdiversity&spatialmultiplexingC.Open-loop&Closed-loopspatialmultiplexingD.Multi-userMIMO
Flash中怎样允许帧actions生效?A. 选择 Control >Loop PlaybackB. 选择 Control >Play All ScenesC. 选择 Control >Mute SoundsD. 选择 Control >Enable Frame. Actions
This incident at the meeting is a ______ example of his lack of self－control. A. typicalB. bareC. closeD. rapid
200 Start the turning gear， and with some one hand-operating the cylinder lubricators at regular intervals, and with the indicator cocks@,and with the control gear in theoposition, give the engine at least one complete turnA.open; stopB.closed, stopC.open; startD.closed: start
_______control system is one in which the control action is independent of the output.A.Feed backB.Negative feed backC.Close loopD.Open loop
第一组An automatic system usually consists of a control system and an information system. A control system is a system which measures the condition of some entity and, with the information, governs the state of a variable; i.e., speed, temperature, pressure, position, etc. The open-loop system is the simplest form. a control system may assume. It is distinguished from the closed-loop system by the lack of an input which measures the state of the controlled variable; such an input is called a feedback. In modern ships the open-loop system has practically disappeared and the closed-loop system which operates with a feed-back is extensively used. An information system serves the parallel function of monitoring system or plant performance. The monitoring function may serve a number of purposes; specifically it may indicate values of controlled variables to guide remote control operations, warn of off-limit conditions and provide record of performance. In many cases a visual and audible alarm may be provided to warn of off-limit conditions on board ship and, associated with this, the important variables will be recorded on demand. The automatic control system can be more sophisticated by incorporating digital-processing equipment, that is, a computer. This computer is usually fed with signals from all sensors. It scans the values of the sensors and generates alarm signals for off-limit conditions, acting as a super-supervisor. Sometimes, it can even make necessary and take the necessary action to optimize performance without human intervention.The closed-loop system differs from the open-loop system byA.the lack of a feedbackB.the presence of a feed backC.the lack of a computerD.the presence of a computer
Because the circulating water is in a closed loop,_______is installed to cater for expansion and contraction of the water at different conditions of operation.A.an expansion jointB.a drain tankC.a head tankD.a contraction tank
In ______ the control action is independent on the output.A.a closed loop control systemB.an open loop control systemC.a boiler control systemD.a steering gear control system
The project management plan defines how the project is executed,monitored and controlled,and closed.It is progressively elaborated by updates,and controlled and approved through the perform integrated（ ）process.A.Cost controlB.Schedule controlC.Change controlD.Risk control
Which two are natively included by the IEEE 802.1w standard？（）A、instances can control a selection of VLANsB、load balancingC、fast transition to forwarding stateD、backbone，uplink，and portfast （or equivalent）E、root，loop，and BPDU guard （or equivalent）
设置PDCCH信道是否使用发射分集的参数是（）A、Cell Open-loop Spatial Multiplexing Used IndicatorB、Transmit Diversity Indicator for Common ChannelC、Cell transmit Diversity Used IndicatorD、Cell Closed-loop Spatial Multiplexing Used Indicator
设置PDCCH信道是否使用发射分集的参数是（）。 A、Cell Open-loop Spatial Multiplexing UsedIndicatorB、Transmit Diversity Indicatorfor Common ChannelC、Celltransmit Diversity UsedIndicatorD、Cell Closed-loop Spatial Multiplexing UsedIndicator
如果（）参数设置过低，AN可能需要发送更多的接入探测，从而导致接入信道负载增加，发生碰撞的概率增大。A、Open Loop Power AdjustmentB、Initial Probe Power Correction FactorC、PowerIncrementStepD、Initial Power Control Thresholdfor Reverse Outer Loop
You are using RMAN to perform a closed database backup of your database. You issue these RMAN commands： STARTUP MOUNT； BACKUP FORMAT ’/BACKUP/df_%d_%s_%p.bus’ DATABASE filesperset = 2； Which components are included in the backup？（）A、Only the data files.B、Only the data files and the online logs.C、The data files， control files， and the online logs.D、The data files and control files， but not the online logs.
Which two file types must be included in a closed database backup taken with operating system commands？（）A、data filesB、control fileC、password fileD、online redo log filesE、initialization parameter file
Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you. Which two statements are true in this scenario？（）A、The instance aborts.B、The database cannot be recovered.C、The database can be recovered by restoring the control files from the backup.D、The database remains opened and you have to shut it down with the ABORT option.E、The database can be restored till the point of the last closed whole database backup.
单选题This arrangement is （） if the elements are directly connected to one another and the control action takes place without human involvement.Aa manual closed loopBa manual opened loopCan automatic closed loopDan automatic opened loop
单选题The steam boiler is part of a closed loop steam, whereby, after the energy of the steam is used up and it becomes water again, （） is collected and returned back to the boiler for heating up again to steam.Athe formerBthe firstCthe latterDthe last
单选题In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）Aimproper venting of the cooling systemBcarrying the expansion tank water level too highCa totally clogged impeller in the cooling water pumpDan incorrectly set cooling system temperature control
单选题The database is being restored from a closed backup. The data files， control files， password file， and parameter file are available， but the online redo logs are not. Because the online redo logs are not available， you must simulate recovery and alter the database open with the reset logs option so the online redo logs are created while the database opens. Which type of recover is used in this situation？（）Auntil SCNBuntil timeCuntil cancelDusing backup control file
单选题In （） the control action is independent on(of) the output.Aa closed loop control systemBan open loop control systemCa boiler control systemDa steering gear control system
单选题In （）the control action is independent on the output.Aa closed loop control systemBan open loop control systemCa boiler control systemDa steering gear
多选题Which two are natively included by the IEEE 802.1w standard？（）Ainstances can control a selection of VLANsBload balancingCfast transition to forwarding stateDbackbone，uplink，and portfast （or equivalent）Eroot，loop，and BPDU guard （or equivalent）
多选题Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you. Which two statements are true in this scenario？（）AThe instance aborts.BThe database cannot be recovered.CThe database can be recovered by restoring the control files from the backup.DThe database remains opened and you have to shut it down with the ABORT option.EThe database can be restored till the point of the last closed whole database backup.
单选题The closed-loop system differs from the open-loop system by（）Athe lack of a feedbackBthe presence of a feed backCthe lack of a computerDthe presence of a computer
单选题（） control system is one in which the control action is independent of the output.AFeed backBNegative feed backCClose loopDOpen loop