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Xin Mao

11 accepted papers

2026

Risk-Sensitive Reinforcement Learning for Alleviating Exploration Dilemmas in Large Language Models

ICLR 2026poster

Reinforcement Learning with Verifiable Rewards (RLVR) has proven effective for enhancing Large Language Models (LLMs) on complex reasoning tasks. Yet current methods face an exploration dilemma: standard RL struggles to escape the local optima of pre-trained LLMs’ sharply peaked initial policies, bo…

Cited by 0SourceScholar
2025

As Simple as Fine-tuning: LLM Alignment via Bidirectional Negative Feedback Loss

ICLR 2025poster

Direct Preference Optimization (DPO) has emerged as a more computationally efficient alternative to Reinforcement Learning from Human Feedback (RLHF) with Proximal Policy Optimization (PPO), eliminating the need for reward models and online sampling. Despite these benefits, DPO and its variants rema…

Cited by 2SourcePDFScholar
2025

Full-Step-DPO: Self-Supervised Preference Optimization with Step-wise Rewards for Mathematical Reasoning

ACL 2025finding

Direct Preference Optimization (DPO) often struggles with long-chain mathematical reasoning. Existing approaches, such as Step-DPO, typically improve this by focusing on the first erroneous step in the reasoning chain. However, they overlook all other steps and rely heavily on humans or GPT-4 to ide…

2025

SCOPE: Compress Mathematical Reasoning Steps for Efficient Automated Process Annotation

ACL 2025finding

Process Reward Models (PRMs) have demonstrated promising results in mathematical reasoning, but existing process annotation approaches, whether through human annotations or Monte Carlo simulations, remain computationally expensive. In this paper, we introduce Step COmpression for Process Estimation…

2024

Don’t Forget Your Reward Values: Language Model Alignment via Value-based Calibration

EMNLP 2024main

While Reinforcement Learning from Human Feedback (RLHF) significantly enhances the generation quality of Large Language Models (LLMs), recent studies have raised concerns regarding the complexity and instability associated with the Proximal Policy Optimization (PPO) algorithm, proposing a series of…

2024

Sailor: Open Language Models for South-East Asia

EMNLP 2024system demonstrations

We present Sailor, a family of open language models ranging from 0.5B to 14B parameters, tailored for South-East Asian (SEA) languages. From Qwen1.5, Sailor models accept 200B to 400B tokens during continual pre-training, primarily covering the languages of English, Chinese, Vietnamese, Thai, Indone…

2023

An Effective and Efficient Time-aware Entity Alignment Framework via Two-aspect Three-view Label Propagation

IJCAI 2023poster

Entity alignment (EA) aims to find the equivalent entity pairs between different knowledge graphs (KGs), which is crucial to promote knowledge fusion. With the wide use of temporal knowledge graphs (TKGs), time-aware EA (TEA) methods appear to enhance EA. Existing TEA models are based on Graph Neura…

2022

A Simple Temporal Information Matching Mechanism for Entity Alignment between Temporal Knowledge Graphs

COLING 2022main

Entity alignment (EA) aims to find entities in different knowledge graphs (KGs) that refer to the same object in the real world. Recent studies incorporate temporal information to augment the representations of KGs. The existing methods for EA between temporal KGs (TKGs) utilize a time-aware attenti…

2022

An Effective and Efficient Entity Alignment Decoding Algorithm via Third-Order Tensor Isomorphism

ACL 2022long

Entity alignment (EA) aims to discover the equivalent entity pairs between KGs, which is a crucial step for integrating multi-source KGs.For a long time, most researchers have regarded EA as a pure graph representation learning task and focused on improving graph encoders while paying little attenti…

2022

LightEA: A Scalable, Robust, and Interpretable Entity Alignment Framework via Three-view Label Propagation

EMNLP 2022main

Entity Alignment (EA) aims to find equivalent entity pairs between KGs, which is the core step to bridging and integrating multi-source KGs. In this paper, we argue that existing complex EA methods inevitably inherit the inborn defects from their neural network lineage: poor interpretability and wea…

2021

From Alignment to Assignment: Frustratingly Simple Unsupervised Entity Alignment

EMNLP 2021main

Cross-lingual entity alignment (EA) aims to find the equivalent entities between crosslingual KGs (Knowledge Graphs), which is a crucial step for integrating KGs. Recently, many GNN-based EA methods are proposed and show decent performance improvements on several public datasets. However, existing G…