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攵勋划 statistical learning 韱店硠 鞁犼步毵� quadratic discriminant analysis k-nearest neighbor artificial neural network neural network boosting random forests logistic regression 雿办澊韯半�堨澊雼� 牍呺嵃鞚错劙 data mining 韽愳梾 鞓堨浮 chicken place 鞓堨浮 氇�順� 旃橅偍歆� big data analysis prediction model