trend surface analysis

Spherical harmonics is of importance for spherical signal analysis.

球面调和分析是球面信号分析的重要工具,本文采用球面调和描述子对图像进行形状匹配,首先把平面图像映射到球面上,然后计算球面图像的球面调和描述子,最后通过球面调和描述子得到平面图像的相似性。

Considering the movement character of discontinuous deformation in Jiashi strong earthquake swarm,the stress and distance fields of fore-and-aft earthquake are systemically studied using the spherical discontinuous deformation analysis method with the restriction condition of GPS observations.

结合伽师强震区板块的非连续性变形运动特征,应用球面非连续变形分析方法,以大范围板块GPS监测数据为约束条件,对伽师地区强震前后的位移场、应力场的数值模拟与运动预测进行了系统的研究;通过断裂后的再次位移约束,全程模拟了伽师强震群地区从孕震到地震发生,直到再次聚集能量的过程,揭示了伽师强震群地区的地震活动规律。