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Zhihua Zhang

2 papers indexed

arxivcs.IRcs.LG2026-07-24

PinEqualizer: Full Funnel Content Exploration and Debiasing System at Pinterest

Olafur Gudmundsson, Bo Zhao, Huayi Liao, Anna Kiyantseva, Sai Xiao, Heath Vinicombe, et al.

In this paper, we propose a new solution for addressing the content cold-start problem in industry-scale search and recommender systems. Compared to prior approaches, we have made the following new contributions: 1) our solution spans the entire multi-stage funnel and generalizes…

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arxivstat.MLcs.LG2026-07-09

Statistical Efficiency and Inference of Quantile Distributional Reinforcement Learning

Zijie Cheng, Yang Peng, Zhihua Zhang

In this paper, we study quantile-based distributional reinforcement learning from the perspective of statistical efficiency. We focus on distributional policy evaluation, whose goal is to characterize the return distribution, namely the distribution of discounted cumulative rewar…

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