Jiaxing Qu — Papers on Cortexa

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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arxivcs.IRcs.LG2026-07-14

MESH: Scaling Up Retrieval with Heterogeneous Content Unification

Jiaxing Qu, Yilin Chen, Junpeng Hou, Jinfeng Rao, Olafur Gudmundsson, Sai Xiao, et al.

Optimizing large-scale retrieval hinges on the ability to efficiently surface candidates across diverse content tiers. However, to capture segments such as fresh and long-tail content, modern systems typically resort to a fragmented "zoo" of specialized retrieval models. This ope…

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