The user model is expressed in form of vector space model. It's built using centroid-based classification method.

基于向量空间模型表示用户模型，采用重心向量分类算法建立用户模型。

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The user model is expressed in form of vector space model. It's built using centroid-based classification method.

基于向量空间模型表示用户模型，采用重心向量分类算法建立用户模型。

youdao