并由刚体平面运动方程，推导出混凝土护坡板的绝对稳定和准稳定条件关系式，以确定护坡板的尺寸。
The formulas are derived for the conditions of concrete blocks absolute-stability and quasi-stability according to the equations of stiff-body motion on plane.
当基态运动为剪切流(或较差旋转)时，这一性质将使不稳定波自动演化到准稳阶段。
When the motion of the basic state is the shear flow (or the differential rotation), this property means that the unstable waves would evolve automatically into the quasi-stationary stage.
根据稳定状态船舶操纵运动非线性数学模型，通过优化计算求出操纵性特征曲线，以此作为船舶操纵性初步衡准依据。
This paper calculates the diagram of steering by using optimal method according to the nonlinear mathematical model of ship maneuverability.
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