A 3-d face model is constructed by the imaging theory and spherical harmonics, combining with the principle of 3-d projection and PCA.
根据3 - D数据的优势，利用图像成像原理和球面调和函数理论，结合3 - D投影原理和PC A技术建立了一个3 - D人脸模型。
A nonlinear elastoplastic model is applied to simulate the full face 3-d excavation process of a shallow tunnel embedded in layered soil.
文章应用非线性弹塑性模型，对层状土地层中浅埋隧道全断面开挖过程进行了三维有限元分析。
Objective: to build 3-d digital face model of unilateral orbital defect and find a new method to get 3-d data of facial defects.
目的：建立活体单侧眼眶部缺损的面部三维数字化模型，探讨颜面部缺损三维数据快速精确采集的新方法。
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