本文研究特征为2的有限域上正交几何中的计数问题，给出了一个计数定理。
In this paper, enumeration problems in the orthogonal geometry over a finite field with characteristic 2 are studied, and an enumeration theorem is proved.
讨论了扭转波的几何弥散效应及其诸模态的正交特性。
The effects of geometrical dispersion and the orthogonalities of all wave modes for torsional waves are discussed.
和基于几何矩的纹理分割相比，用正交矩可以降低分割错误率。
Compared with the geometric moment-based texture segmentation, we can reduce the error rates using orthogonal moments.
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