二阶矩矩阵
Second-order moments matrix
second moment matrix
n阶冲激响应函数矩阵(n阶Volterra核矩阵)
二阶Sylvester矩阵方程
second-order Sylvester matrix equation
二阶矩阵微分系统
matrix differential system
刚塑性阶梯形截面悬臂梁
rigid plastic stepped cantilever beams
阶梯梯度洗脱
stepwise gradient elution
阶梯形变幅杆
stepped ultrasonic horn
Stepped ultrasonic transformer