利用Z曲线聚类和降维特性，本文给出网格划分方法、搜索区域分解过程，提出一种高维空间范围查询算法。
Based on Z curve, the paper presents a method of grid partition, a procedure of partitioning search region, and a high-dimensional spatial range query algorithm.
利用球面调和级数的空间正交分解特性，计算三维颅骨的空间分解特征向量，继而构造三维特征描述子。
A new approach is presented to calculate 3d skull spatial decomposition feature vector through using the orthogonal decomposition property of spherical harmonic transform.
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