activity
20202026
most citedCountry Image in COVID-19 Pandemic: A Case Study of China

38 citations · 50 across the 12 of their papers we have counts for

collaborators

13 papers

cs.CY2026

Representational Equality in Cross-country Value Simulation: A Systematic Analysis of Large Language Models

Xiaowen Jian, Xinyi Mou, Daisong Gong +3

Traditional methods for studying human opinions often struggle to support representative and scalable research across countries. Large language models (LLMs) can serve as scalable…

cs.LG2026

KARL: Mitigating Hallucinations in LLMs via Knowledge-Boundary-Aware Reinforcement Learning

Cheng Gao, Cheng Huang, Kangyang Luo +5

Enabling large language models (LLMs) to appropriately abstain from answering questions beyond their knowledge is crucial for mitigating hallucinations. While existing reinforcemen…

cs.AI2025

H-Neurons: On the Existence, Impact, and Origin of Hallucination-Associated Neurons in LLMs

Cheng Gao, Huimin Chen, Chaojun Xiao +3

Large language models (LLMs) frequently generate hallucinations -- plausible but factually incorrect outputs -- undermining their reliability. While prior work has examined halluci…

cs.CY2025

Large Language Models' Complicit Responses to Illicit Instructions across Socio-Legal Contexts

Xing Wang, Huiyuan Xie, Yiyan Wang +7

Large language models (LLMs) are now deployed at unprecedented scale, assisting millions of users in daily tasks. However, the risk of these models assisting unlawful activities re…

cs.CL2025

The Overthinker's DIET: Cutting Token Calories with DIfficulty-AwarE Training

Weize Chen, Jiarui Yuan, Tailin Jin +4

Recent large language models (LLMs) exhibit impressive reasoning but often over-think, generating excessively long responses that hinder efficiency. We introduce DIET ( DIfficulty-…

cs.IR2024★ 1 cited

Enhancing Legal Case Retrieval via Scaling High-quality Synthetic Query-Candidate Pairs

Cheng Gao, Chaojun Xiao, Zhenghao Liu +3

Legal case retrieval (LCR) aims to provide similar cases as references for a given fact description. This task is crucial for promoting consistent judgments in similar cases, effec…

cs.AI2024★ 4 cited

Configurable Foundation Models: Building LLMs from a Modular Perspective

Chaojun Xiao, Zhengyan Zhang, Chenyang Song +20

Advancements in LLMs have recently unveiled challenges tied to computational efficiency and continual scalability due to their requirements of huge parameters, making the applicati…

cs.CL2024★ 1 cited

PersLLM: A Personified Training Approach for Large Language Models

Zheni Zeng, Jiayi Chen, Huimin Chen +5

Large language models (LLMs) exhibit human-like intelligence, enabling them to simulate human behavior and support various applications that require both humanized communication an…

cs.CL2024

The Right Time Matters: Data Arrangement Affects Zero-Shot Generalization in Instruction Tuning

Bingxiang He, Ning Ding, Cheng Qian +10

Understanding alignment techniques begins with comprehending zero-shot generalization brought by instruction tuning, but little of the mechanism has been understood. Existing work…

cs.AI2024★ 5 cited

Advancing LLM Reasoning Generalists with Preference Trees

Lifan Yuan, Ganqu Cui, Hanbin Wang +12

We introduce Eurus, a suite of large language models (LLMs) optimized for reasoning. Finetuned from Mistral-7B and CodeLlama-70B, Eurus models achieve state-of-the-art results amon…

cs.CL2024

Controllable Preference Optimization: Toward Controllable Multi-Objective Alignment

Yiju Guo, Ganqu Cui, Lifan Yuan +9

Alignment in artificial intelligence pursues the consistency between model responses and human preferences as well as values. In practice, the multifaceted nature of human preferen…

cs.CY2021★ 1 cited

From Symbols to Embeddings: A Tale of Two Representations in Computational Social Science

Huimin Chen, Cheng Yang, Xuanming Zhang +3

Computational Social Science (CSS), aiming at utilizing computational methods to address social science problems, is a recent emerging and fast-developing field. The study of CSS i…

cs.CY2020★ 38 cited

Country Image in COVID-19 Pandemic: A Case Study of China

Huimin Chen, Zeyu Zhu, Fanchao Qi +4

Country image has a profound influence on international relations and economic development. In the worldwide outbreak of COVID-19, countries and their people display different reac…