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Xikun ZHANG

13 accepted papers

2026

MaskPro: Linear-Space Probabilistic Learning for Strict (N:M)-Sparsity on LLMs

ICLR 2026poster

The rapid scaling of large language models(LLMs) has made inference efficiency a primary bottleneck in the practical deployment. To address this, semi-structured sparsity offers a promising solution by strategically retaining $N$ elements out of every $M$ weights, thereby enabling hardware-friendly…

Cited by 0SourceScholar
2025

Crisp: Cognitive Restructuring of Negative Thoughts through Multi-turn Supportive Dialogues

EMNLP 2025

Cognitive Restructuring (CR) uses multi-turn dialogue to identify and restructure one’s negative thoughts, arising from mental health issues, into more helpful and positive ones. Clinician shortage and stigma urge the development of human-LLM interactive psychotherapy for CR. Yet, effectively implem

2025

Effective Policy Learning for Multi-Agent Online Coordination Beyond Submodular Objectives

NeurIPS 2025poster

In this paper, we present two effective policy learning algorithms for multi-agent online coordination(MA-OC) problem. The first one, **MA-SPL**, not only can achieve the optimal $(1-\frac{c}{e})$-approximation guarantee for the MA-OC problem with submodular objectives but also can handle the unex…

Cited by 0SourceScholar
2025

Learning system dynamics without forgetting

ICLR 2025poster

Observation-based trajectory prediction for systems with unknown dynamics is essential in fields such as physics and biology. Most existing approaches are limited to learning within a single system with fixed dynamics patterns. However, many real-world applications require learning across systems wi…

2025

MMReason: An Open-Ended Multi-Modal Multi-Step Reasoning Benchmark for MLLMs Toward AGI

ICCV 2025poster

Reasoning plays a crucial role in advancing Multimodal Large Language Models (MLLMs) toward Artificial General Intelligence.However, existing MLLM benchmarks often fall short in precisely and comprehensively evaluating long-chain reasoning abilities from three key aspects: (1) lack of difficulty and…

2025

R1-VL: Learning to Reason with Multimodal Large Language Models via Step-wise Group Relative Policy Optimization

ICCV 2025poster

Recent studies generally enhance MLLMs' reasoning capabilities via supervised fine-tuning on high-quality chain-of-thought reasoning data, which often leads models to merely imitate successful reasoning paths without understanding what the wrong reasoning paths are.In this work, we aim to enhance th…

2024

Empowering Time Series Analysis with Large Language Models: A Survey

IJCAI 2024poster

Recently, remarkable progress has been made over large language models (LLMs), demonstrating their unprecedented capability in varieties of natural language tasks. However, completely training a large general-purpose model from the scratch is challenging for time series analysis, due to the large vo…

2022

CLEVRER-Humans: Describing Physical and Causal Events the Human Way

NeurIPS 2022accept

Building machines that can reason about physical events and their causal relationships is crucial for flexible interaction with the physical world. However, most existing physical and causal reasoning benchmarks are exclusively based on synthetically generated events and synthetic natural language d…

Cited by 23SourcePDFScholar
2022

Deep Bidirectional Language-Knowledge Graph Pretraining

NeurIPS 2022accept

Pretraining a language model (LM) on text has been shown to help various downstream NLP tasks. Recent works show that a knowledge graph (KG) can complement text data, offering structured background knowledge that provides a useful scaffold for reasoning. However, these works are not pretrained to le…

2022

GreaseLM: Graph REASoning Enhanced Language Models

ICLR 2022spotlight

Answering complex questions about textual narratives requires reasoning over both stated context and the world knowledge that underlies it. However, pretrained language models (LM), the foundation of most modern QA systems, do not robustly represent latent relationships between concepts, which is ne…

Cited by 0SourcePDFScholar