劳斯判据主要用于判断系统是否稳定和确定系统参数的允许范围，但不能给出系统稳定的程度。

判断一个闭环线性控制系统是否稳定，可采用劳斯判据、轨根迹、（）等方法。

各种防滑控制系统在判断滑行时，使用了许多判据。这些判据主要有速度差、（）、和滑移率等。

稳定是对控制系统最基本的要求，若一个控制系统的响应曲线为衰减振荡，则该系统稳定。判断一个闭环线性控制系统是否稳定，在时域分析中采用劳斯判据；在频域分析中采用（）

系统的特征方程为 试用劳斯判据判断系统的稳定性。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。