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我目前正在使用 Gensim LDA 进行主题建模。
在调整超参数时,我发现该模型总是给出负对数困惑
模型的行为这样正常吗?(甚至可能吗?)
如果是,较小的困惑是否比较大的困惑更好?(-100 比 -20 好??)