个体及团体异构多方面评分行为建模

刘鲲鹏,赵宵飒,胡一睿,傅衍杰

Modeling the Effects of Individual and Group Heterogeneity on Multi-Aspect Rating Behavior

Kunpeng Liu,Xiaosa Zhao,Yirui Hu,Yanjie Fu

Table 2 The generative process

1. Draw user latent factor ${{u}_{i}}\tilde{\ }P({{u}_{i}};{{\sigma }_{{{u}_{i}}}})$ 2. Generate aspect-1 rating a. Draw item aspect-1 latent factor ${{e}_{j}}\tilde{\ }P({{e}_{j}};{{\sigma }_{{{e}_{j}}}})$ b. Draw item aspect-1 rating ${{g}_{ij}}\tilde{\ }P(u_{i}^{T}\cdot {{e}_{j}})$ 3. Generate aspect-2 rating a. Draw aspect-2 latent factor ${{c}_{j}}\tilde{\ }P({{c}_{j}};{{\sigma }_{{{c}_{j}}}})$ b. Draw aspect-2 rating ${{h}_{ij}}\tilde{\ }P(u_{i}^{T}\cdot {{c}_{j}})$. 4. Generate overall rating a. Draw aspect weights $p$ and $q$, s.t. $p+q=1$ b. Draw overall rating ${{y}_{ij}}\tilde{\ }P(p\cdot u_{i}^{T}\cdot {{e}_{j}}+q\cdot u_{i}^{T}\cdot {{c}_{j}})$