Author

Chenghao Zhang

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Jul 2026

DIRECTOR: Dynamic Index-based Recommendation with Transport-Optimized Retrieval

This work proposes Dynamic Index-based RECommendation with Transport-Optimized Retrieval with Transport-Optimized Retrieval (DIRECTOR), a transport-guided parallel reranking framework that consistently outperforms strong reranking baselines, achieving significant improvement in large-scale industrial recommendation scenarios.

Yuanhao Pu, Chenghao Zhang, Chao Feng et al. · arXiv.org · 0 citations

Preprint Aug 2026

SWIM: Step-Wise Integrated Measure for Session-supervised List Evaluation in Generative Re-ranking

SWIM (Step-Wise Integrated Measure), a list-level evaluator that models user behaviors as a finite-horizon prefix session-level survival process, and efficiently estimates continuation probabilities and utilities in parallel, satisfying strict industrial latency constraints.

Yuan Pu, Chenghao Zhang, Chao Feng et al. · 0 citations

Jul 2026

PSG: Pair-Space Generation for Efficient Generative Reranking

Pair-Space Generation (PSG), a reformulation that elevates the generation atom from individual items to ordered item pairs and establishes three theoretical guarantees that it is bijective with item-space generation and induces an equivalent family of sequence distributions, thus incurring no loss of expressiveness.

Chao Feng, Li Ma, Xiancheng Gao et al. · arXiv.org · 0 citations