Via the discussion about the extremum question of two kinds of special ternary function, Obtain the sufficient condition of judging if they can get the extremum by their coefficients.
通过对两类特殊三元函数极值问题的探讨，得到了由其系数来判别它们能否取得极值的充分条件。
The nonlinear least square method and functional condition extremum model are introduced to describe the problems and numerical solution of them is proposed.
首先确定了自由度组合到指尖空间位置的映射，建立了求解上述问题的最小二乘模型、泛函条件极值模型，并给出了数值解法。
A new method for monitoring non-normalized coating system is proposed by using these wavelengths as monitor wavelengths for each to fulfil the monitoring condition for extremum method.
利用这些波长作为每层膜的监控波长，满足光电极值法的监控条件，由此提出了一种监控非规整膜系的新方法。
The numerical results show that the extremum direction of shear waves coincides with the direction of far-field principal stress. Furthermore, we verify the validity condition of the simplified model.
数值结果表明横波波速的极值方向与岩石远场应力的方向相一致，指出了简化模型的适用条件。
The numerical results show that the extremum direction of shear waves coincides with the direction of far-field principal stress. Furthermore, we verify the validity condition of the simplified model.
数值结果表明横波波速的极值方向与岩石远场应力的方向相一致，指出了简化模型的适用条件。
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