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RUIZHE CHEN

29 accepted papers

2026

BiasFreeBench: a Benchmark for Mitigating Bias in Large Language Model Responses

ICLR 2026poster

Existing studies on bias mitigation methods for large language models (LLMs) use diverse baselines and metrics to evaluate debiasing performance, leading to inconsistent comparisons among them. Moreover, their evaluations are mostly based on the comparison between LLMs' probabilities of biased and u…

Cited by 0SourcecodeScholar
2026

CodePercept: Code-Grounded Visual STEM Perception for MLLMs

CVPR 2026

When MLLMs fail at Science, Technology, Engineering, and Mathematics (STEM) visual reasoning, a fundamental question arises: is it due to perceptual deficiencies or reasoning limitations? Through systematic scaling analysis that independently scales perception and reasoning components, we uncover a

Cited by 0SourcecodeScholar
2026

From Narrow to Panoramic Vision: Attention-Guided Cold-Start Reshapes Multimodal Reasoning

ICLR 2026poster

The cold-start initialization stage plays a pivotal role in training Multimodal Large Reasoning Models (MLRMs), yet its mechanisms remain insufficiently understood. To analyze this stage, we introduce the Visual Attention Score (VAS), an attention-based metric that quantifies how much a model attend…

Cited by 0SourcecodeScholar
2026

Learning Transferable Temporal Primitives for Video Reasoning via Synthetic Videos

CVPR 2026

The transition from image to video understanding requires vision-language models (VLMs) to shift from recognizing static patterns to reasoning over temporal dynamics such as motion trajectories, speed changes, and state transitions. Yet current post-training methods fall short due to two critical li

Cited by 0SourcecodeScholar
2026

OptimSyn: Influence-Guided Rubrics Optimization for Synthetic Data Generation

ICLR 2026poster

Large language models (LLMs) achieve strong downstream performance largely due to abundant supervised fine-tuning (SFT) data that imparts problem-solving capabilities. However, as applications expand, high-quality SFT data in knowledge-intensive verticals (e.g., humanities and social sciences, medic…

Cited by 0SourceScholar
2026

RealUnify: Do Unified Models Truly Benefit from Unification? A Comprehensive Benchmark

CVPR 2026

The integration of visual understanding and generation into unified multimodal models represents a significant stride toward general-purpose AI. However, a fundamental question remains unanswered by existing benchmarks: does this architectural unification actually enable synergetic interaction betwe

Cited by 0SourcecodeScholar
2025

An All-Atom Generative Model for Designing Protein Complexes

ICML 2025poster

Proteins typically exist in complexes, interacting with other proteins or biomolecules to perform their specific biological roles. Research on single-chain protein modeling has been extensively and deeply explored, with advancements seen in models like the series of ESM and AlphaFold2. Despite these…

2025

BiasFilter: An Inference-Time Debiasing Framework for Large Language Models

EMNLP 2025

Mitigating social bias in large language models (LLMs) has become an increasingly important research objective. However, existing debiasing methods often incur high human and computational costs, exhibit limited effectiveness, and struggle to scale to larger models and open-ended generation tasks. T

2025

BiasGuard: A Reasoning-Enhanced Bias Detection Tool for Large Language Models

ACL 2025finding

Identifying bias in LLM-generated content is a crucial prerequisite for ensuring fairness in LLMs. Existing methods, such as fairness classifiers and LLM-based judges, face limitations related to difficulties in understanding underlying intentions and the lack of criteria for fairness judgment. In t…

Cited by 0SourcePDFScholar
2025

Demeaned Sparse: Efficient Anomaly Detection by Residual Estimate

ICML 2025poster

Frequency-domain image anomaly detection methods can substantially enhance anomaly detection performance, however, they still lack an interpretable theoretical framework to guarantee the effectiveness of the detection process. We propose a novel test to detect anomalies in structural image via a Dem…

Cited by 0SourcePDFScholar
2025

DiffPO: Diffusion-styled Preference Optimization for Inference Time Alignment of Large Language Models

ACL 2025long

Inference-time alignment provides an efficient alternative for aligning LLMs with humans. However, these approaches still face challenges, such as limited scalability due to policy-specific value functions and latency during the inference phase. In this paper, we propose a novel approach, Diffusion-…

2025

DynamicNER: A Dynamic, Multilingual, and Fine-Grained Dataset for LLM-based Named Entity Recognition

EMNLP 2025

The advancements of Large Language Models (LLMs) have spurred a growing interest in their application to Named Entity Recognition (NER) methods. However, existing datasets are primarily designed for traditional machine learning methods and are inadequate for LLM-based methods, in terms of corpus sel

2025

FRN: Fractal-Based Recursive Spectral Reconstruction Network

NeurIPS 2025poster

Generating hyperspectral images (HSIs) from RGB images through spectral reconstruction can significantly reduce the cost of HSI acquisition. In this paper, we propose a Fractal-Based Recursive Spectral Reconstruction Network (FRN), which differs from existing paradigms that attempt to directly integ…

Cited by 0SourcecodeScholar
2025

FairMT-Bench: Benchmarking Fairness for Multi-turn Dialogue in Conversational LLMs

ICLR 2025spotlight

The increasing deployment of large language model (LLM)-based chatbots has raised concerns regarding fairness. Fairness issues in LLMs may result in serious consequences, such as bias amplification, discrimination, and harm to minority groups. Many efforts are dedicated to evaluating and mitigating…

2025

FairSteer: Inference Time Debiasing for LLMs with Dynamic Activation Steering

ACL 2025finding

Large language models (LLMs) are prone to capturing biases from training corpus, leading to potential negative social impacts. Existing prompt-based debiasing methods exhibit instability due to their sensitivity to prompt changes, while fine-tuning-based techniques incur substantial computational ov…

2025

Identifying and Mitigating Social Bias Knowledge in Language Models

NAACL 2025findings

Generating fair and accurate predictions plays a pivotal role in deploying pre-trained language models (PLMs) in the real world. However, existing debiasing methods may inevitably generate incorrect or nonsensical predictions as they are designed and evaluated to achieve parity across different soci…

Cited by 1SourcePDFScholar
2025

MT-R1-Zero: Advancing LLM-based Machine Translation via R1-Zero-like Reinforcement Learning

EMNLP 2025

Large-scale reinforcement learning (RL) methods have proven highly effective in enhancing the reasoning abilities of large language models (LLMs), particularly for tasks with verifiable solutions such as mathematics and coding. However, applying this idea to machine translation (MT), where outputs a

2025

Modality-Fair Preference Optimization for Trustworthy MLLM Alignment

IJCAI 2025

Multimodal large language models (MLLMs) have achieved remarkable success across various tasks. However, separate training of visual and textual encoders often results in a misalignment of the modality. Such misalignment may lead models to generate content that is absent from the input image, a phen

Cited by 0SourcePDFScholar
2025

PAD: Personalized Alignment of LLMs at Decoding-time

ICLR 2025poster

Aligning with personalized preferences, which vary significantly across cultural, educational, and political differences, poses a significant challenge due to the computational costs and data demands of traditional alignment methods. In response, this paper presents Personalized Alignment at Decodin…

Cited by 10SourcePDFScholar
2025

Persona-judge: Personalized Alignment of Large Language Models via Token-level Self-judgment

ACL 2025finding

Aligning language models with human preferences presents significant challenges, particularly in achieving personalization without incurring excessive computational costs. Existing methods rely on reward signals and additional annotated data, limiting their scalability and adaptability to diverse hu…

Cited by 0SourcePDFScholar
2024

Antigen-Specific Antibody Design via Direct Energy-based Preference Optimization

NeurIPS 2024poster

Antibody design, a crucial task with significant implications across various disciplines such as therapeutics and biology, presents considerable challenges due to its intricate nature. In this paper, we tackle antigen-specific antibody sequence-structure co-design as an optimization problem towards…

Cited by 21SourcePDFScholar
2024

BiasAlert: A Plug-and-play Tool for Social Bias Detection in LLMs

EMNLP 2024main

Evaluating the bias of LLMs becomes more crucial with their rapid development. However, existing evaluation approaches rely on fixed-form outputs and cannot adapt to the flexible open-text generation scenarios of LLMs (e.g., sentence completion and question answering). To address this, we introduce…

Cited by 12SourcePDFScholar
2024

Ladder: A Model-Agnostic Framework Boosting LLM-based Machine Translation to the Next Level

EMNLP 2024main

General-purpose Large Language Models (LLMs) like GPT-4 have achieved remarkable advancements in machine translation (MT) by leveraging extensive web content. On the other hand, translation-specific LLMs are built by pre-training on domain-specific monolingual corpora and fine-tuning with human-anno…

2024

Robustness-Guided Image Synthesis for Data-Free Quantization

AAAI 2024technical

Quantization has emerged as a promising direction for model compression. Recently, data-free quantization has been widely studied as a promising method to avoid privacy concerns, which synthesizes images as an alternative to real training data. Existing methods use classification loss to ensure the…

Cited by 4SourcePDFScholar
2023

Fast Model DeBias with Machine Unlearning

NeurIPS 2023poster

Recent discoveries have revealed that deep neural networks might behave in a biased manner in many real-world scenarios. For instance, deep networks trained on a large-scale face recognition dataset CelebA tend to predict blonde hair for females and black hair for males. Such biases not only jeopard…

Cited by 60SourcePDFScholar
2023

QTSumm: Query-Focused Summarization over Tabular Data

EMNLP 2023long main

People primarily consult tables to conduct data analysis or answer specific questions. Text generation systems that can provide accurate table summaries tailored to users' information needs can facilitate more efficient access to relevant data insights. Motivated by this, we define a new query-focu…

Cited by 0SourcecodeScholar
2023

Towards Distribution-Agnostic Generalized Category Discovery

NeurIPS 2023poster

Data imbalance and open-ended distribution are two intrinsic characteristics of the real visual world. Though encouraging progress has been made in tackling each challenge separately, few works dedicated to combining them towards real-world scenarios. While several previous works have focused on cla…

2022

A Robust Object Segmentation Network for UnderWater Scenes

ICASSP 2022accepted

Underwater object segmentation is one of the key technologies in the fields of marine biology research and autonomous underwater vehicles. The challenges of underwater object segmentation originate from two aspects, 1) the complex underwater environment and 2) the camouflage characteristics of marin…

Cited by 0SourceScholar