Extensibility: Addition of new feature elements does not require the change of the code.
扩展性：添加新的特性元素并不需要更改代码。
Even more specialized handling of certain feature elements is dealt with through additional templates without modifying existing code.
即使需要特殊处理某些特性元素，也可以通过其他模板解决，而不需要修改现有代码。
Generality: Without having to list all possible element names, the code is general enough to encompass the variation of different feature elements that might appear in instance documents.
通用性：由于不需要列出所有可能的元素名，使代码更加通用，可以包含可能出现在实例文档中的不同特性元素的变体。
By calculating the mean and standard deviation of image subbands decomposed by NSCT, the texture feature elements are extracted.
以nsct域各子带系数的均值和标准方差构成基本特征向量。
By calculating the mean and standard deviation of image subbands decomposed by NSCT, the texture feature elements are extracted.
以nsct域各子带系数的均值和标准方差构成基本特征向量。
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