By implementing spectrum factorization on the half-band filters, all the analytic and synthetic filters were constructed.

再对半带滤波器进行谱分解，构造出了各分析和综合滤波器。

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Inspired by the nonnegative matrix factorization algorithm, we put forward an fuzzy text clustering method based on nonnegative factor analysis.

本文借助于非负矩阵分解算法，提出了一种基于非负因子分析的模糊文本聚类方法。

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Meanwhile, by polyphase factorization, it was proved that the low-pass filter satisfies perfect reconstruction condition.

同时借助多相位分解，证明了多通道低通滤波器满足完全重构条件。

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