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Haobo Wang

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#small language model Preprint Oct 2026

Purifying Backdoored Large Vision-Language Models by Removing Hijacked Directions

OrthoPurify is proposed, a more efficient method to purify backdoored model weights via one-step orthogonal projection, which reduces the attack success rate to near zero while preserving the original performance across diverse benchmarks, without retraining the backdoored model or introducing inference-time overhead.

Bo-Jun Yang, Hao-Chen Zhou, Zhi-Fang Zhang et al. · 0 citations
Conference Open access Sep 2026

Dual Branch Mutual Teaching for Long-Tailed Partial Label Learning

In Partial Label Learning (PLL), each instance is associated with a candidate label set, with exactly one label being true. While most studies implicitly assume balanced class distributions, real-world data often exhibit severe class imbalance distributions, leading to the Long-Tailed Partial Label Learning (LT-PLL) pr...

Xiangyu Ren, Mingxuan Xia, Guang-Cheng Zhu et al. · 0 citations
Conference Open access Sep 2026

MarCon: Max-Margin Contrastive Learning for Imbalanced Domain Adaptation Semantic Segmentation

This work derives a reformulated pixel-level contrastive learning objective by modeling feature distributions with the von Mises-Fisher distribution, and introduces a Reliability-aware Filter based on the vMF-derived metrics, which performs adaptive class-wise pixel reliability assessment to identify unreliable pixels...

Yi-Bo Wang, Rui-Kang Xu, Guang-Cheng Zhu et al. · 0 citations
#machine learning Preprint Sep 2026

DE-Venus: A Data-Efficient RLVR Framework for Large Language Models

Reinforcement learning with verifiable rewards (RLVR) improves large language model reasoning, but its practical scaling is constrained by expensive on-policy rollouts and the cost of obtaining reliable targets at scale. Existing methods address sample selection, incomplete supervision, or noisy labels separately, ofte...

Shen-Zhi Yang, Guang-Cheng Zhu, Kai Tang et al. · 0 citations
#machine learning Preprint Sep 2026

Frozen Cores Need Task Signal: Fisher-Whitened Cross-Covariance for Low-Resource LLM Adaptation

FCCA, which estimates the signed input--error cross-covariance, whitens it with diagonal Fisher moments, truncates it in the resulting local metric, maps the selected directions back, and applies thin QR to obtain stable core coordinates, shows that a carefully selected fixed span can recover most of the benefit of mov...

Wen-Song Ye, Zhan-Ming Shen, Zhiqing Xiao et al. · 1 citation · ⚡1
Preprint Jul 2026

Semantically Similar, Logically Distinct: Diagnosing the Semantic-Answerability Gap in Table RAG

This work introduces TCR-Bench, a diagnostic benchmark for Table Content-level Answerability in RAG, and tests whether a lightweight two-stage pipeline, Answerability-Aware Reranking (AAR), applying direct query-table answerability judgment, can recover performance.

Jiaming Tian, Liyao Li, Wen-song Ye et al. · 0 citations

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