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。
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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