The And-Or graph stochastic grammar is used for the understanding, decomposing, learning and sampling on shape object.
其中采用了基于与或图的随机图像语法模型，以此指导对形状物体的理解、分解、学习、采样。
Finally, many complex mode shape derivatives of high accuracy can be obtained by decomposing system matrices only once.
该方法仅需进行一次系统矩阵的分解就可获得高精度的多个复振型导数。
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