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Wenhao Liu

30 accepted papers

2026

Paper Folding Puzzles: Can Multimodal Large Language Models Perform Spatial Reasoning?

AAAI 2026technical

Multimodal Large Language Models (MLLMs) largely lag human-level performance on abstract visual reasoning (AVR), which requires models to infer latent rules from visual question sets and generalize them to novel scenarios. Most AVR benchmarks are constrained to narrow and repetitive 2D patterns, inv

Cited by 0SourcePDFScholar
2026

PosPrune: Visual Token Pruning with Positional Bias Correction for Efficient Large Vision-Language Models

AAAI 2026technical

Large Vision-Language Models (LVLMs) enhance performance on vision-language tasks by integrating visual features from pre-trained vision encoders into large language models (LLMs). However, the large number of visual tokens introduces significant computational overhead. Existing token pruning method

Cited by 0SourcePDFScholar
2026

RECAST: Expanding the Boundaries of LLMs' Complex Instruction Following with Multi-Constraint Data

ICLR 2026poster

Large language models (LLMs) are increasingly expected to tackle complex tasks, driven by their expanding applications and users' growing proficiency in crafting sophisticated prompts. However, as the number of explicitly stated requirements increases (particularly more than $10$ constraints), LLMs…

Cited by 0SourceScholar
2026

TRIP-Bench: A Benchmark for Long-Horizon Interactive Agents in Real-World Scenarios

ICML 2026poster

As LLM-based agents are deployed in increasingly complex real-world settings, existing benchmarks underrepresent key challenges such as enforcing global constraints, coordinating multi-tool reasoning, and adapting to evolving user behavior over long, multi-turn interactions. To bridge this gap, we i…

Cited by 0SourceScholar
2025

A Bio-Inspired Sand-Rolling Robot: Effect of Body Shape on Sand Rolling Performance

ICRA 2025

The capability of effectively moving on complex terrains such as sand and gravel can empower our robots to robustly operate in outdoor environments, and assist with critical tasks such as environment monitoring, search-and-rescue, and supply delivery. Inspired by the Mount Lyell salamander's ability

Cited by 2SourceScholar
2025

FreeDOM: Online Dynamic Object Removal Framework for Static Map Construction Based on Conservative Free Space Estimation

RA-L 2025

Online map construction is essential for autonomous robots to navigate in unknown environments. However, the presence of dynamic objects may introduce artifacts into the map, which can significantly degrade the performance of localization and path planning. To tackle this problem, a novel online dyn

Cited by 3SourcecodeScholar
2025

KBQA-o1: Agentic Knowledge Base Question Answering with Monte Carlo Tree Search

ICML 2025poster

Knowledge Base Question Answering (KBQA) aims to answer natural language questions with a large-scale structured knowledge base (KB). Despite advancements with large language models (LLMs), KBQA still faces challenges in weak KB awareness, imbalance between effectiveness and efficiency, and high rel…

2025

Revisiting Jailbreaking for Large Language Models: A Representation Engineering Perspective

COLING 2025main

The recent surge in jailbreaking attacks has revealed significant vulnerabilities in Large Language Models (LLMs) when exposed to malicious inputs. While various defense strategies have been proposed to mitigate these threats, there has been limited research into the underlying mechanisms that make…

Cited by 5SourcePDFScholar
2025

STORM-BORN: A Challenging Mathematical Derivations Dataset Curated via a Human-in-the-Loop Multi-Agent Framework

ACL 2025finding

High-quality math datasets are crucial for advancing the reasoning abilities of large language models (LLMs). However, existing datasets often suffer from three key issues: outdated and insufficient challenging content, neglecting human-like reasoning, and limited reliability due to single-LLM gener…

2025

Safe and Efficient Navigation for Differential-Drive Robots in Dynamic Pedestrian Environments

IROS 2025

Differential-drive robots are widely used in dynamic pedestrian environments, such as hospitals, for time-sensitive tasks like medication delivery, which require high navigation efficiency to ensure timely arrivals. However, existing methods tend to overemphasize safety, resulting in overly conserva

Cited by 0SourceScholar
2025

Tell Me What You Don’t Know: Enhancing Refusal Capabilities of Role-Playing Agents via Representation Space Analysis and Editing

ACL 2025finding

Role-Playing Agents (RPAs) have shown remarkable performance in various applications, yet they often struggle to recognize and appropriately respond to hard queries that conflict with their role-play knowledge. To investigate RPAs’ performance when faced with different types of conflicting requests,…

Cited by 0SourcePDFScholar
2025

UPLex: Fine-Grained Personality Control in Large Language Models via Unsupervised Lexical Modulation

EMNLP 2025

Personality is a crucial factor that shapes human communication patterns, thereby regulating the personalities of large language models (LLMs) holds significant potential in enhancing their user experiences. Previous approaches either relied on fine-tuning LLMs on specific corpora or required manual

Cited by 0SourcePDFScholar
2025

scSiameseClu: A Siamese Clustering Framework for Interpreting Single-cell RNA Sequencing Data

IJCAI 2025

Single-cell RNA sequencing (scRNA-seq) reveals cell heterogeneity, with cell clustering playing a key role in identifying cell types and marker genes. Recent advances, especially graph neural networks (GNNs)-based methods, have significantly improved clustering performance. However, the analysis of

Cited by 0SourcePDFScholar
2024

Advancing Parameter Efficiency in Fine-tuning via Representation Editing

ACL 2024long

Parameter Efficient Fine-Tuning (PEFT) has gained significant attention for its ability to achieve competitive results while updating only a small subset of trainable parameters. Despite the promising performance of current PEFT methods, they present challenges in hyperparameter selection, such as d…

2024

Aligning Large Language Models with Human Preferences through Representation Engineering

ACL 2024long

Aligning large language models (LLMs) with human preferences is crucial for enhancing their utility in terms of helpfulness, truthfulness, safety, harmlessness, and interestingness. Existing methods for achieving this alignment often involve employing reinforcement learning from human feedback (RLHF…

2024

Promoting Data and Model Privacy in Federated Learning through Quantized LoRA

EMNLP 2024finding

Conventional federated learning primarily aims to secure the privacy of data distributed across multiple edge devices, with the global model dispatched to edge devices for parameter updates during the learning process. However, the development of large language models (LLMs) requires substantial dat…

Cited by 3SourcePDFScholar
2023

CaPE: Contrastive Parameter Ensembling for Reducing Hallucination in Abstractive Summarization

ACL 2023findings

Hallucination is a known issue for neural abstractive summarization models. Recent work suggests that the degree of hallucination may depend on factual errors in the training data. In this work, we propose a new method called Contrastive Parameter Ensembling (CaPE) to use training data more effectiv…

Cited by 20SourcePDFScholar
2023

Improving Gender Fairness of Pre-Trained Language Models without Catastrophic Forgetting

ACL 2023short

Existing studies addressing gender bias of pre-trained language models, usually build a small gender-neutral data set and conduct a second phase pre-training on the model with such data. However, given the limited size and concentrated focus of the gender-neutral data, catastrophic forgetting would…

2023

Parameter Efficient Multi-task Fine-tuning by Learning to Transfer Token-wise Prompts

EMNLP 2023long findings

Prompt tuning has been proven to be successful on various tasks by incorporating a small number of trainable parameters while freezing large pre-trained language models (PLMs). However, it is still unsettled how to generate more proper prompts for any individual examples and how to extend prompt tu…

Cited by 0SourceScholar
2022

A Generative Language Model for Few-shot Aspect-Based Sentiment Analysis

NAACL 2022findings

Sentiment analysis is an important task in natural language processing. In recent works, pre-trained language models are often used to achieve state-of-the-art results, especially when training data is scarce. It is common to fine-tune on the downstream task, usually by adding task-specific layers o…

2022

Conformal Predictor for Improving Zero-Shot Text Classification Efficiency

EMNLP 2022main

Pre-trained language models (PLMs) have been shown effective for zero-shot (0shot) text classification. 0shot models based on natural language inference (NLI) and next sentence prediction (NSP) employ cross-encoder architecture and infer by making a forward pass through the model for each label-text…

Cited by 3SourcePDFScholar
2022

DialFact: A Benchmark for Fact-Checking in Dialogue

ACL 2022long

Fact-checking is an essential tool to mitigate the spread of misinformation and disinformation. We introduce the task of fact-checking in dialogue, which is a relatively unexplored area. We construct DialFact, a testing benchmark dataset of 22,245 annotated conversational claims, paired with pieces…

2022

Exploring Neural Models for Query-Focused Summarization

NAACL 2022findings

Query-focused summarization (QFS) aims to produce summaries that answer particular questions of interest, enabling greater user control and personalization. While recently released datasets, such as QMSum or AQuaMuSe, facilitate research efforts in QFS, the field lacks a comprehensive study of the b…

2022

HydraSum: Disentangling Style Features in Text Summarization with Multi-Decoder Models

EMNLP 2022main

Summarization systems make numerous “decisions” about summary properties during inference, e.g. degree of copying, specificity and length of outputs, etc. However, these are implicitly encoded within model parameters and specific styles cannot be enforced. To address this, we introduce HydraSum, a n…

2022

MixQG: Neural Question Generation with Mixed Answer Types

NAACL 2022findings

Asking good questions is an essential ability for both human and machine intelligence. However, existing neural question generation approaches mainly focus on short factoid type of answers. In this paper, we introduce a neural question generator, MixQG, to bridge this gap. We combine nine question a…

2022

Near-Negative Distinction: Giving a Second Life to Human Evaluation Datasets

EMNLP 2022main

Precisely assessing the progress in natural language generation (NLG) tasks is challenging, and human evaluation to establish a preference in a model’s output over another is often necessary.However, human evaluation is usually costly, difficult to reproduce, and non-reusable.In this paper, we propo…

2022

Open Vocabulary Object Detection with Pseudo Bounding-Box Labels

ECCV 2022poster

"Despite great progress in object detection, most existing methods work only on a limited set of object categories, due to the tremendous human effort needed for bounding-box annotations of training data. To alleviate the problem, recent open vocabulary and zero-shot detection methods attempt to det…

2022

QAConv: Question Answering on Informative Conversations

ACL 2022long

This paper introduces QAConv, a new question answering (QA) dataset that uses conversations as a knowledge source. We focus on informative conversations, including business emails, panel discussions, and work channels. Unlike open-domain and task-oriented dialogues, these conversations are usually l…

2022

QAFactEval: Improved QA-Based Factual Consistency Evaluation for Summarization

NAACL 2022long

Factual consistency is an essential quality of text summarization models in practical settings. Existing work in evaluating this dimension can be broadly categorized into two lines of research, entailment-based and question answering (QA)-based metrics, and different experimental setups often lead t…

2022

Quiz Design Task: Helping Teachers Create Quizzes with Automated Question Generation

NAACL 2022findings

Question generation (QGen) models are often evaluated with standardized NLG metrics that are based on n-gram overlap. In this paper, we measure whether these metric improvements translate to gains in a practical setting, focusing on the use case of helping teachers automate the generation of reading…