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【简答题】
轨道电路的基本工作状态有()、分路状态、断轨状态
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【简答题】ticket machine的汉语翻译是(__);
【简答题】seat ticket的汉语翻译是(__);
【简答题】booking office/ticket office的汉语翻译是( );
【单选题】The control mode in which the final control element is moved from one of two flexed positions to the other is known as _____.
A.
dead band action
B.
neutral zone action
C.
range
D.
on-off action
【单选题】Chapter 4: Which of the following is true for Robust Control?
A.
It ensures that the system can still operate stably in the event of a failure and has acceptable performance metrics.
B.
It is the control method used by a controller which must adapt to a controlled system with parameters which vary, or are initially uncertain.
C.
It maintains the desired performance of the system while the model is inaccurate and other changing factors exist.
D.
It is a type of control method that uses models to control the future behavior of objects.
E.
It is to find the allowable control law, to transfer the controlled system from the initial state to the required final state, and to ensure that the specified objective function reaches the maximum (small) value.
【单选题】Which control of breathing is more limited?
A.
Involuntary (unconscious) control of breathing
B.
The voluntary (conscious) control of breathing
C.
Both are equal in their ability to control breathing
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