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 1 Mathematical notations

Symbol Size Description Y I×J Overall rating matrix G I×J Aspect-2 rating matrix H I×J Aspect-1 rating matrix yij 1 Overall rating of user i for item j gij 1 Aspect-1 rating of user i for item j hij 1 aspect-2 rating of user i for item j U K×1 User latent matrix E K×J Item aspect-1 latent matrix C K×J Item aspect-2 latent matrix ui K×1 Latent features of user i ej K×1 Aspect-1 latent features of item j cj K×1 Aspect-2 latent features of item j uki 1 k-th latent feature of user i ekj 1 k-th latent feature of aspect-1 of item j ckj 1 k-th latent feature of aspect-2 of item j