Tianjun Wei

representation learning (1) contrastive learning (1) collaborative filtering (1) graph embedding (1) sequential recommendation (1) recommender system (1) user simulator (1) large language model (1) graph neural network (1) recommendation diversity (1) item popularity (1) causal deconfounding (1) counterfactual exposure (1) co-purchase relationship (1) profile optimization (1) diagnostic module (1)