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Wei Chu

28 accepted papers

2026

The Choice of Divergence: A Neglected Key to Mitigating Diversity Collapse in Reinforcement Learning with Verifiable Reward

ICLR 2026poster

A central paradox in fine-tuning Large Language Models (LLMs) with Reinforcement Learning with Verifiable Reward (RLVR) is the frequent degradation of multi-attempt performance (Pass@k) despite improvements in single-attempt accuracy (Pass@1). This is often accompanied by catastrophic forgetting, wh…

Cited by 0SourceScholar
2025

An Attentive Dual-Encoder Framework Leveraging Multimodal Visual and Semantic Information for Automatic OSAHS Diagnosis

ICASSP 2025accepted

Obstructive sleep apnea-hypopnea syndrome (OS-AHS) is a common sleep disorder caused by upper airway blockage, leading to oxygen deprivation and disrupted sleep. Traditional diagnosis using polysomnography (PSG) is expensive, time-consuming, and uncomfortable. Existing deep learning methods using fa…

Cited by 0SourceScholar
2025

CogniDual Framework: Self-Training Large Language Models within a Dual-System Theoretical Framework for Improving Cognitive Tasks

ICASSP 2025accepted

Cognitive psychology investigates perception, attention, memory, language, problem-solving, decision-making, and reasoning. Kahneman’s dual-system theory elucidates the human decision-making process, distinguishing between the rapid, intuitive System 1 and the deliberative, rational System 2. Recent…

Cited by 0SourceScholar
2025

Guess What I am Thinking: A Benchmark for Inner Thought Reasoning of Role-Playing Language Agents

EMNLP 2025

Recent advances in Large Language Model (LLM)-based Role-Playing Language Agents (RPLAs) have attracted broad attention in various applications. While chain-of-thought reasoning has shown importance in many tasks for LLMs, the internal thinking processes of RPLAs remain unexplored. Understanding cha

Cited by 0SourcePDFScholar
2025

OpenCoder: The Open Cookbook for Top-Tier Code Large Language Models

ACL 2025long

Code LLMs have been widely used in various domains, including code generation, logical reasoning, and agent systems. However, open-access code LLMs mostly only release weights, lacking key features such as reproducible data pipelines and transparent training protocols, which are crucial for advancin…

2025

To Code or not to Code? Adaptive Tool Integration for Math Language Models via Expectation-Maximization

ACL 2025finding

Recent advances in mathematical problem-solving with language models (LMs) integrate chain-of-thought (CoT) reasoning and code execution to harness their complementary strengths. However, existing hybrid frameworks exhibit a critical limitation: they depend on externally dictated instructions or rig…

2025

VL-Rethinker: Incentivizing Self-Reflection of Vision-Language Models with Reinforcement Learning

NeurIPS 2025spotlight

Recently, slow-thinking systems like GPT-o1 and DeepSeek-R1 have demonstrated great potential in solving challenging problems through explicit reflection. They significantly outperform the best fast-thinking models, such as GPT-4o, on various math and science benchmarks. However, their multimodal re…

Cited by 0SourceScholar
2024

LogicMP: A Neuro-symbolic Approach for Encoding First-order Logic Constraints

ICLR 2024poster

Integrating first-order logic constraints (FOLCs) with neural networks is a crucial but challenging problem since it involves modeling intricate correlations to satisfy the constraints. This paper proposes a novel neural layer, LogicMP, which performs mean-field variational inference over a Markov L…

2024

ULMR: Unlearning Large Language Models via Negative Response and Model Parameter Average

EMNLP 2024industry

In recent years, large language models (LLMs) have attracted significant interest from the research community due to their broad applicability in many language-oriented tasks, and are now widely used in numerous areas of production and daily life. One source of the powerful capabilities of LLMs is t…

Cited by 1SourcePDFScholar
2023

Boundary-Aware Backward-Compatible Representation via Adversarial Learning in Image Retrieval

CVPR 2023poster

Image retrieval plays an important role in the Internet world. Usually, the core parts of mainstream visual retrieval systems include an online service of the embedding model and a large-scale vector database. For traditional model upgrades, the old model will not be replaced by the new one until th…

2023

DC-Former: Diverse and Compact Transformer for Person Re-identification

AAAI 2023technical

In person re-identification (ReID) task, it is still challenging to learn discriminative representation by deep learning, due to limited data. Generally speaking, the model will get better performance when increasing the amount of data. The addition of similar classes strengthens the ability of the…

2023

DRGCN: Dynamic Evolving Initial Residual for Deep Graph Convolutional Networks

AAAI 2023technical

Graph convolutional networks (GCNs) have been proved to be very practical to handle various graph-related tasks. It has attracted considerable research interest to study deep GCNs, due to their potential superior performance compared with shallow ones. However, simply increasing network depth will,…

2023

Simultaneously Short- and Long-Term Temporal Modeling for Semi-Supervised Video Semantic Segmentation

CVPR 2023poster

In order to tackle video semantic segmentation task at a lower cost, e.g., only one frame annotated per video, lots of efforts have been devoted to investigate the utilization of those unlabeled frames by either assigning pseudo labels or performing feature enhancement. In this work, we propose a no…

Cited by 12SourcePDFScholar
2022

CMUA-Watermark: A Cross-Model Universal Adversarial Watermark for Combating Deepfakes

AAAI 2022technical

Malicious applications of deepfakes (i.e., technologies generating target facial attributes or entire faces from facial images) have posed a huge threat to individuals' reputation and security. To mitigate these threats, recent studies have proposed adversarial watermarks to combat deepfake models,…

2022

Extracting Trigger-sharing Events via an Event Matrix

EMNLP 2022finding

A growing interest emerges in event extraction which aims to extract multiple events with triggers and arguments. Previous methods mitigate the problem of multiple events extraction by predicting the arguments conditioned on the event trigger and event type, assuming that these arguments belong to a…

2022

Keywords and Instances: A Hierarchical Contrastive Learning Framework Unifying Hybrid Granularities for Text Generation

ACL 2022long

Contrastive learning has achieved impressive success in generation tasks to militate the “exposure bias” problem and discriminatively exploit the different quality of references. Existing works mostly focus on contrastive learning on the instance-level without discriminating the contribution of each…

Cited by 14SourcePDFScholar
2022

Switch-BERT: Learning to Model Multimodal Interactions by Switching Attention and Input

ECCV 2022poster

"The ability to model intra-modal and inter-modal interactions is fundamental in multimodal machine learning. The current state-of-the-art models usually adopt deep learning models with fixed structures. They can achieve exceptional performances on specific tasks, but face a particularly challenging…

2022

Training Object Detectors From Scratch: An Empirical Study in the Era of Vision Transformer

CVPR 2022poster

Modeling in computer vision has long been dominated by convolutional neural networks (CNNs). Recently, in light of the excellent performances of self-attention mechanism in the language field, transformers tailored for visual data have drawn numerous attention and triumphed CNNs in various vision ta…

Cited by 16PDFScholar
2021

CASS-NAT: CTC Alignment-Based Single Step Non-Autoregressive Transformer for Speech Recognition

ICASSP 2021accepted

We propose a CTC alignment-based single step non-autoregressive transformer (CASS-NAT) for speech recognition. Specifically, the CTC alignment contains the information of (a) the number of tokens for decoder input, and (b) the time span of acoustics for each token. The information are used to extrac…

Cited by 0SourceScholar
2021

Discrimination-Aware Mechanism for Fine-Grained Representation Learning

CVPR 2021poster

Recently, with the emergence of retrieval requirements for certain individual in the same superclass, e.g., birds, persons, cars, fine-grained recognition task has attracted a significant amount of attention from academia and industry. In fine-grained recognition scenario, the inter-class difference…

Cited by 24PDFScholar
2021

LPSNet: A Lightweight Solution for Fast Panoptic Segmentation

CVPR 2021poster

Panoptic segmentation is a challenging task aiming to simultaneously segment objects (things) at instance level and background contents (stuff) at semantic level. Existing methods mostly utilize two-stage detection network to attain instance segmentation results, and fully convolutional network to p…

Cited by 45PDFScholar
2021

PairRE: Knowledge Graph Embeddings via Paired Relation Vectors

ACL 2021long

Distance based knowledge graph embedding methods show promising results on link prediction task, on which two topics have been widely studied: one is the ability to handle complex relations, such as N-to-1, 1-to-N and N-to-N, the other is to encode various relation patterns, such as symmetry/antisym…

2020

Towards Fast and Accurate Neural Chinese Word Segmentation with Multi-Criteria Learning

COLING 2020main

The ambiguous annotation criteria lead to divergence of Chinese Word Segmentation (CWS) datasets in various granularities. Multi-criteria Chinese word segmentation aims to capture various annotation criteria among datasets and leverage their common underlying knowledge. In this paper, we propose a d…