second order condition 二阶条件 ; 二阶前提
dual second order condition 对偶二阶条件
second-order maximum condition 二次极大条件
second order sufficient condition 二阶充分条件
second order maximum condition 二次极大条件
second-order optimal condition 二阶优化条件
second order necessary condition 二阶必要条件
It is also a sufficient condition for second order linear differential equation with varied coefficient to be integrable.
对于二阶变系数线性微分方程来说，这也是可积的一个充分条件。
A linear integral invariant, a universal integral invariant and an absolute integral invariant of second order of the system are obtained under the given condition.
给出系统存在积分不变量的条件，在此条件下导出系统的线性积分不变量、通用积分不变量和二阶绝对积分不变量。
Additionally, a mathematical manipulation is adopted to remove the second-order spacial derivatives in the body surface boundary condition.
对二阶物面边界条件采用数学手段，推导出一个没有二阶空间导数的表达式，以便于计算。
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