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Wenjun Li

12 accepted papers

2026

Discern Truth from Falsehood: Reducing Over-Refusal via Contrastive Refinement

ICLR 2026poster

Large language models (LLMs) aligned for safety often suffer from over-refusal—the tendency to reject seemingly toxic or benign prompts by misclassifying them as toxic. This behavior undermines models' helpfulness and restricts usability in sensitive or nuanced contexts. While prior work has propose…

Cited by 0SourceScholar
2026

Embodied Navigation Foundation Model

ICLR 2026poster

Navigation is a fundamental capability in embodied AI, representing the intelligence required to perceive and interact within physical environments. To achieve such intelligence, recent advanced works leverage Vision-Language Models (VLMs), which demonstrate strong generalizability and possess a wel…

Cited by 0SourcecodeScholar
2026

LeHome: A Simulation Environment for Deformable Object Manipulation in Household Scenarios

ICRA 2026poster

Household environments present one of the most common, impactful yet challenging application domains for robotics. Within household scenarios, manipulating deformable objects is particularly difficult, both in simulation and real-world execution, due to varied categories and shapes, complex dynamics…

2025

Adaptive Tool Use in Large Language Models with Meta-Cognition Trigger

ACL 2025long

Large language models (LLMs) have shown remarkable emergent capabilities, transforming the execution of functional tasks by leveraging external tools for complex problems that require specialized processing or up-to-date data. While existing research expands LLMs access to diverse tools (e.g., progr…

Cited by 0SourcePDFScholar
2025

Marginal Benefit Driven RL Teacher for Unsupervised Environment Design

AAAI 2025technical

Training generally capable agents in complex environments is a challenging task that involves identifying "right" environments at the training stage. Recent research has highlighted the potential of the Unsupervised Environment Design framework, which generates environment instances/levels adaptivel…

Cited by 0SourcePDFScholar
2025

Unlocking the Planning Capabilities of Large Language Models with Maximum Diversity Fine-tuning

NAACL 2025findings

Large language models (LLMs) have demonstrated impressive task-solving capabilities through prompting techniques and system designs, including solving planning tasks (e.g., math proofs, basic travel planning) when sufficient data is available online and used during pre-training. However, for plannin…

Cited by 0SourcePDFScholar
2024

Improving Environment Novelty Quantification for Effective Unsupervised Environment Design

NeurIPS 2024oral

Unsupervised Environment Design (UED) formalizes the problem of autocurricula through interactive training between a teacher agent and a student agent. The teacher generates new training environments with high learning potential, curating an adaptive curriculum that strengthens the student's ability…

Cited by 0SourcePDFScholar
2024

ODD: A Benchmark Dataset for the Natural Language Processing Based Opioid Related Aberrant Behavior Detection

NAACL 2024long

Opioid related aberrant behaviors (ORABs) present novel risk factors for opioid overdose. This paper introduces a novel biomedical natural language processing benchmark dataset named ODD, for ORAB Detection Dataset. ODD is an expert-annotated dataset designed to identify ORABs from patients’ EHR not…

2024

Unsupervised Training Sequence Design: Efficient and Generalizable Agent Training

AAAI 2024technical

To train generalizable Reinforcement Learning (RL) agents, researchers recently proposed the Unsupervised Environment Design (UED) framework, in which a teacher agent creates a very large number of training environments and a student agent trains on the experiences in these environments to be robust…

Cited by 0SourcePDFScholar
2023

Generalization through Diversity: Improving Unsupervised Environment Design

IJCAI 2023poster

Agent decision making using Reinforcement Learning (RL) heavily relies on either a model or simulator of the environment (e.g., moving in an 8x8 maze with three rooms, playing Chess on an 8x8 board). Due to this dependence, small changes in the environment (e.g., positions of obstacles in the maze,…

Cited by 4SourcePDFScholar
2022

An Accelerated Rank-(L, L, 1, 1) Block Term Decomposition Of Multi-Subject Fmri Data Under Spatial Orthonormality Constraint

ICASSP 2022accepted

The decomposition of multi-subject fMRI data using rank-(L,L,1,1) block term decomposition (BTD) can preserve higher-way data structure and is more robust to noise effects by decomposing shared spatial maps (SMs) into a product of two rank-L loading matrices. However, since the number of whole-brain…

Cited by 4SourceScholar