Computing method of weighted value for feature item based on text representation can determine extraction of text feature, which have influence on accuracy of the text clustering.
文本表示中特征项的权值计算方法决定了文本特征的提取，在很大程度上影响了文本聚类的准确率。
Then a new definition of fractal dimension-extreme value weighted mean fractal dimension is given, and with it the feature matrix is extracted. At last, a cor…
定义了一种新的图像分数维一极值加权平均分数维，用于提取虹膜特征；
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