“bi-level variable selection”的概念、定义、翻译、参考文献-科学参考

单词	bi-level variable selection
释义	bi-level variable selection Encyclopedia 理学数据简化释 bi-level variable selection双层变量选择高维自变量呈现分组结构时，既选择重要的组又识别组内重要变量的方法。
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