local base vectors 局部基向量
covariant base vectors 共变基向量
pair of base vectors 矢量基对
dual biorthogonal base vectors 对偶双正交基向量
base vectors of Riemann manifold Riemann流形标架
Formulae on the base vectors and the coordinate variables derivative going with fluid particle and their application;
因为标量与坐标系无关，故两个矢量的点积称为标量不变量。
By using the discrete position base - vectors approximating for the continuous position base - vector, the discrete position presentation is constructed.
用离散的位置基矢近似替代连续位置基矢，建立分立位置表象。
Signal sample is analyzed through wavelet packet theory, best base is chose, and the average energy of every sub frequency band is calculated, at last 14 links of characteristic vectors are get.
将信号样本进行小波包变换，并选择最好基，计算各子频带的平均能量，得到14维特征向量。
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