Multilevel collaborative top-n recommendation based on enhanced behavior
Traditional recommendation systems only use one type of user behavior.However,multiple behaviors of users are related;therefore,ignoring user behaviors will result in the loss of the influence of auxiliary behavior on the target behavior.This paper proposes a multilevel collaborative Top-N recommendation based on enhanced user behavior(MCREB),which uses the attention mechanism to propagate information on the recommendation bipartite and item-based metapath graphs and learns multilevel high-order and heterogeneous collaborative signals,including user-item and inter-item,to improve recommendation performance.Thus,the model can better use the recommen-dation graph structure and fully consider the interaction between various behaviors on the recommendation graph structure.Furthermore,comprehensive experiments are conducted on the benchmark dataset to verify the model's effectiveness.
auxiliary behaviormultibehaviorgraph neural networkmetapath graphuser-itempropagation lay-ertarget behaviorhigh-order heterogenous signal