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Hongxia Xu

15 accepted papers

2026

CoLA: Co-Calibrated Logit Adjustment for Long-Tailed Semi-Supervised Learning

ICLR 2026poster

Long-tailed semi-supervised learning is hampered by a vicious cycle of confirmation bias, where skewed pseudo-labeling progressively marginalizes tail classes. This challenge is compounded in real-world scenarios by a class distribution mismatch between labeled and unlabeled data, rendering the bias…

Cited by 0SourceScholar
2026

MP2D: Constrained Monte Carlo Tree-Guided Diffusion for Multi-Objective Protein Sequence Design

IJCAI 2026

Designing functional protein sequences that satisfy multiple desired properties is a core research focus of protein engineering. Prior methods struggle with inability or inefficiency when dealing with numerous, often conflicting, properties. We propose Multi-Property Protein Diffusion, (MP2D), a uni

Cited by 0Scholar
2026

Med-Scout: Curing MLLMs' Geometric Blindness in Medical Perception via Geometry-Aware RL Post-Training

ICML 2026poster

Despite recent Multimodal Large Language Models (MLLMs)' linguistic prowess in medical diagnosis, we find even state-of-the-art MLLMs suffer from a critical perceptual deficit: **geometric blindness**. This failure to ground outputs in objective geometric constraints leads to plausible yet factually…

Cited by 0SourceScholar
2026

MoL: Adaptive Mixture-of-Length Reasoning for Efficient Question Answering with Context

ICLR 2026poster

We present Mixture-of-Length (MoL), an approach for Question Answering (QA) with context that aims to improve the balance between reasoning quality and response efficiency. Our method introduces a principled difficulty assessment based on information-theoretic principles and a dual-objective reward…

Cited by 0SourceScholar
2026

WDT-MD: Wavelet Diffusion Transformers for Microaneurysm Detection in Fundus Images

AAAI 2026technical

Microaneurysms (MAs), the earliest pathognomonic signs of Diabetic Retinopathy (DR), present as sub-60 μm lesions in fundus images with highly variable photometric and morphological characteristics, rendering manual screening not only labor-intensive but inherently error-prone. While diffusion-based

Cited by 2SourcePDFScholar
2025

From Misleading Queries to Accurate Answers: A Three-Stage Fine-Tuning Method for LLMs

ACL 2025finding

Large language models (LLMs) exhibit excellent performance in natural language processing (NLP), but remain highly sensitive to the quality of input queries, especially when these queries contain misleading or inaccurate information. Existing methods focus on correcting the output, but they often ov…

Cited by 0SourcePDFScholar
2025

Icon2: Aligning Large Language Models Using Self-Synthetic Preference Data via Inherent Regulation

EMNLP 2025

Large Language Models (LLMs) require high quality preference datasets to align with human preferences. However, conventional methods for constructing such datasets face significant challenges: reliance on pre-collected instructions often leads to distribution mismatches with target models, while the

2025

LIFTED: Multimodal Clinical Trial Outcome Prediction via Large Language Models and Mixture-of-Experts

EMNLP 2025

Clinical trials are pivotal yet costly processes, often spanning multiple years and requiring substantial expenses, motivating predictive models to identify likely-to-fail drugs early and save resources. Recent approaches leverage deep learning to integrate multimodal data for clinical outcome predi

Cited by 0SourcePDFScholar
2025

OrderChain: Towards General Instruct-Tuning for Stimulating the Ordinal Understanding Ability of MLLM

ICCV 2025poster

Despite the remarkable progress of multimodal large language models (MLLMs), they continue to face challenges in achieving competitive performance on ordinal regression (OR; a.k.a. ordinal classification). To address this issue, this paper presents OrderChain, a novel and general prompting paradigm…

2025

Reason from Future: Reverse Thought Chain Enhances LLM Reasoning

ACL 2025finding

It has been demonstrated that carefully designed reasoning paradigms, like Chain-of-Thought(CoT) and Tree-of-Thought(ToT), can enhance the reasoning capabilities of small language models by detailed thinking and extensive thought searching, unbounded branching factors in the searching space create p…

Cited by 0SourcePDFScholar
2024

Enhancing Semi-Supervised Learning via Representative and Diverse Sample Selection

NeurIPS 2024poster

Semi-Supervised Learning (SSL) has become a preferred paradigm in many deep learning tasks, which reduces the need for human labor. Previous studies primarily focus on effectively utilising the labelled and unlabeled data to improve performance. However, we observe that how to select samples for lab…

2024

Making Pre-trained Language Models Great on Tabular Prediction

ICLR 2024spotlight

The transferability of deep neural networks (DNNs) has made significant progress in image and language processing. However, due to the heterogeneity among tables, such DNN bonus is still far from being well exploited on tabular data prediction (e.g., regression or classification tasks). Condensing k…

2024

Mind’s Mirror: Distilling Self-Evaluation Capability and Comprehensive Thinking from Large Language Models

NAACL 2024long

Large language models (LLMs) have achieved remarkable advancements in natural language processing. However, the massive scale and computational demands of these models present formidable challenges when considering their practical deployment in resource-constrained environments. While techniques suc…

2024

Unraveling Babel: Exploring Multilingual Activation Patterns of LLMs and Their Applications

EMNLP 2024main

Recently, large language models (LLMs) have achieved tremendous breakthroughs in the field of NLP, but still lack understanding of their internal neuron activities when processing different languages. We designed a method to convert dense LLMs into fine-grained MoE architectures, and then visually s…

Cited by 1SourcePDFScholar