选择适当的变换矩阵，对尺度向量进行双尺度相似变换，可以使其具有满意的逼近阶。
Then choosing suitable transform matrix, and applying TST to it, the satisfactory approximation order of the multi-scaling vector was achieved.
利用双尺度相似变换构造了高逼近阶的双正交尺度向量。
The biorthogonal multi-scaling vector with higher approximation order was constructed using TST.
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