【单选题】Unity 3D的Help菜单中,连接至 Unity 官方论坛的命令是: A. Unity Service B. Unity Forum C. Unity Answers D. Unity Feedback
【单选题】Unity 3D的Help菜单中,连接至 Unity 官方论坛的命令是: A. Unity Service B. Unity Forum C. Unity Answers D. Unity Feedback
If the steady-state error of unity feedback control system to a ramp input is constant, then the system is a type system A: 0 B: I C: II D: III
If the steady-state error of unity feedback control system to a ramp input is constant, then the system is a type system A: 0 B: I C: II D: III
To get a current-voltage conversion circuit, () should be introduced in the amplifier circuit. A: current-series negative feedback B: current-shunt negative feedback C: voltage-series negative feedback D: voltage-shunt negative feedback
To get a current-voltage conversion circuit, () should be introduced in the amplifier circuit. A: current-series negative feedback B: current-shunt negative feedback C: voltage-series negative feedback D: voltage-shunt negative feedback
which variable will be measured in the feedback control?______ will be measured in the feedback control.
which variable will be measured in the feedback control?______ will be measured in the feedback control.
"Thrree Unities" refer to the following EXCEPT: A: Unity of Time B: Unity of Place C: Unity of Action D: Unity of Character
"Thrree Unities" refer to the following EXCEPT: A: Unity of Time B: Unity of Place C: Unity of Action D: Unity of Character
The open-loop transfer function of the unity-feedback control system is G(s)=5/(s(s+2)) . When input is the unit-step,the steady-state error is .
The open-loop transfer function of the unity-feedback control system is G(s)=5/(s(s+2)) . When input is the unit-step,the steady-state error is .
反馈（feedback）
反馈（feedback）
Effective feedback is well timed so that the employee can (easy) ____________ connect the feedback with his actions.
Effective feedback is well timed so that the employee can (easy) ____________ connect the feedback with his actions.
对于一个单位正反馈系统,开环传函为G,其闭环系统的模型为() A: feedback(G,1,-1) B: feedback(G,1,1) C: feedback(G,1) D: feedback(G,-1)
对于一个单位正反馈系统,开环传函为G,其闭环系统的模型为() A: feedback(G,1,-1) B: feedback(G,1,1) C: feedback(G,1) D: feedback(G,-1)
一般Unity开发者一定要购买专业版Unity（ ）
一般Unity开发者一定要购买专业版Unity（ ）