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Xiangyang Li

35 accepted papers

2026

ATGen: Adversarial Reinforcement Learning for Test Case Generation

ICLR 2026poster

Large Language Models (LLMs) show remarkable code generation capabilities but often produce imperfect code with subtle bugs. A critical bottleneck for improving code quality is the scarcity of high-quality test cases. Existing approaches, primarily based on Supervised Fine-Tuning (SFT) over static d…

Cited by 0SourceScholar
2026

GA-VLN: Geometry-Aware BEV Representation for Efficient Vision-Language Navigation

CVPR 2026

Despite significant progress in Vision-Language Navigation (VLN), existing approaches still rely on dense RGB videos that produce excessive patch tokens and lack explicit spatial structure, resulting in substantial computational overhead and limited spatial reasoning. To address these issues, we int

Cited by 0SourceScholar
2026

MCPTox: A Benchmark for Tool Poisoning on Real-World MCP Servers

AAAI 2026technical

By providing a standardized interface for LLM agents to interact with external tools, the Model Context Protocol (MCP) is quickly becoming a cornerstone of the modern autonomous agent ecosystem. However, it creates novel attack surfaces due to untrusted external tools. While prior work has focused o

Cited by 0SourcePDFScholar
2026

Scalable Mixed-Integer Optimization with Neural Constraints via Dual Decomposition

AAAI 2026technical

Embedding deep neural networks (NNs) into mixed-integer programs (MIPs) is attractive for decision making with learned constraints, yet state-of-the-art monolithic linearisations blow up in size and quickly become intractable. In this paper, we introduce a novel dual-decomposition framework that rel

Cited by 0SourcePDFScholar
2025

Bridging Relevance and Reasoning: Rationale Distillation in Retrieval-Augmented Generation

ACL 2025finding

The reranker and generator are two critical components in the Retrieval-Augmented Generation (i.e., RAG) pipeline, responsible for ranking relevant documents and generating responses. However, due to differences in pre-training data and objectives, there is an inevitable gap between the documents ra…

Cited by 0SourcePDFScholar
2025

CoIR: A Comprehensive Benchmark for Code Information Retrieval Models

ACL 2025long

Despite the substantial success of Information Retrieval (IR) in various NLP tasks, most IR systems predominantly handle queries and corpora in natural language, neglecting the domain of code retrieval. Code retrieval is critically important yet remains under-explored, with existing methods and benc…

2025

CodePRM: Execution Feedback-enhanced Process Reward Model for Code Generation

ACL 2025finding

Code generation is a critical reasoning task for large language models (LLMs). Recent advancements have focused on optimizing the thought process of code generation, achieving significant improvements. However, such thought process lacks effective process supervision, making it hard to optimize the…

2025

CtrlA: Adaptive Retrieval-Augmented Generation via Inherent Control

ACL 2025finding

Retrieval-augmented generation (RAG) has emerged as a promising solution for mitigating hallucinations of large language models (LLMs) with retrieved external knowledge. Adaptive RAG enhances this approach by enabling dynamic retrieval during generation, activating retrieval only when the query exce…

2025

Don't Restart, Just Reuse: Reoptimizing MILPs with Dynamic Parameters

ICML 2025poster

Many real-world applications, such as logistics, routing, scheduling, and production planning, involve dynamic systems that require continuous updates to solutions for new Mixed Integer Linear Programming (MILP) problems. These systems often require rapid updates to their solutions to accommodate s…

Cited by 0SourcePDFScholar
2025

Humanity’s Last Code Exam: Can Advanced LLMs Conquer Human’s Hardest Code Competition?

EMNLP 2025

Code generation is a core capability of large language models (LLMs), yet mainstream benchmarks (e.g., APPs and LiveCodeBench) contain questions with medium-level difficulty and pose no challenge to advanced LLMs. To better reflected the advanced reasoning and code generation ability, We introduce H

2025

Improving Pre-trained Language Models with Knowledge Enhancement and Filtering Framework

NAACL 2025findings

Pre-trained language models (PLMs) are widely used in NLP but struggle with capturing entity knowledge. To address this, knowledge enhancement techniques have been proposed. However, existing methods rely heavily on external knowledge bases embedding and often introduce noisy entity representations.…

Cited by 0SourcePDFScholar
2025

LLMTreeRec: Unleashing the Power of Large Language Models for Cold-Start Recommendations

COLING 2025main

The lack of training data gives rise to the system cold-start problem in recommendation systems, making them struggle to provide effective recommendations. To address this problem, Large Language Models(LLMs) can model recommendation tasks as language analysis tasks and provide zero-shot results bas…

2025

Learning to Select Nodes in Branch and Bound with Sufficient Tree Representation

ICLR 2025poster

Branch-and-bound methods are pivotal in solving Mixed Integer Linear Programming (MILP), where the challenge of node selection arises, necessitating the prioritization of different regions of the space for subsequent exploration. While machine learning techniques have been proposed to address this,…

Cited by 0SourcePDFScholar
2025

MTRec: Learning to Align with User Preferences via Mental Reward Models

NeurIPS 2025poster

Recommendation models are predominantly trained using implicit user feedback, since explicit feedback is often costly to obtain. However, implicit feedback, such as clicks, does not always reflect users' real preferences. For example, a user might click on a news article because of its attractive he…

Cited by 0SourceScholar
2025

MURKA: Multi-Reward Reinforcement Learning with Knowledge Alignment for Optimization Tasks

NeurIPS 2025poster

Optimization plays a central role in Operations Research (OR) and numerous industrial applications, yet automating the end-to-end process of translating natural language descriptions into executable optimization programs remains a formidable challenge. While recent efforts have applied Large Languag…

Cited by 0SourceScholar
2025

MoonCast: High-Quality Zero-Shot Podcast Generation

NeurIPS 2025poster

Recent advances in text-to-speech synthesis have achieved notable success in generating high-quality short utterances for individual speakers. However, these systems still face challenges when extending their capabilities to long, multi-speaker, and spontaneous dialogues, typical of real-world scena…

Cited by 0SourcecodeScholar
2025

Process vs. Outcome Reward: Which is Better for Agentic RAG Reinforcement Learning

NeurIPS 2025poster

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by integrating external knowledge, yet traditional RAG systems struggle with static workflows and limited adaptability for complex, multistep reasoning tasks. Agentic RAG systems, such as DeepResearch, address these issues th…

Cited by 0SourcecodeScholar
2025

TaCIE: Enhancing Instruction Comprehension in Large Language Models through Task-Centred Instruction Evolution

COLING 2025main

The fine-tuning of Large Language Models (LLMs) specialized in code generation has seen notable advancements through the use of open-domain coding queries. Despite the successes, existing methodologies like Evol-Instruct encounter performance limitations, impeding further enhancements in code genera…

2024

Instruction Fusion: Advancing Prompt Evolution through Hybridization

ACL 2024long

The fine-tuning of Large Language Models (LLMs) specialized in code generation has seen notable advancements through the use of open-domain coding queries. Despite the successes, existing methodologies like Evol-Instruct encounter performance limitations, impeding further enhancements in code genera…

2024

Lookahead Exploration with Neural Radiance Representation for Continuous Vision-Language Navigation

CVPR 2024highlight

Vision-and-language navigation (VLN) enables the agent to navigate to a remote location following the natural language instruction in 3D environments. At each navigation step the agent selects from possible candidate locations and then makes the move. For better navigation planning the lookahead exp…

2024

MC-indexing: Effective Long Document Retrieval via Multi-view Content-aware Indexing

EMNLP 2024finding

Long document question answering (DocQA) aims to answer questions from long documents over 10k words. They usually contain content structures such as sections, sub-sections, and paragraph demarcations. However, the indexing methods of long documents remain under-explored, while existing systems gene…

2024

NaturalSpeech 3: Zero-Shot Speech Synthesis with Factorized Codec and Diffusion Models

ICML 2024oral

While recent large-scale text-to-speech (TTS) models have achieved significant progress, they still fall shorts in speech quality, similarity, and prosody. Considering that speech intricately encompasses various attributes (e.g., content, prosody, timbre, and acoustic details) that pose significant…

Cited by 172SourcePDFScholar
2024

PromptTTS 2: Describing and Generating Voices with Text Prompt

ICLR 2024poster

Speech conveys more information than text, as the same word can be uttered in various voices to convey diverse information. Compared to traditional text-to-speech (TTS) methods relying on speech prompts (reference speech) for voice variability, using text prompts (descriptions) is more user-friendly…

2024

Sim-to-Real Transfer via 3D Feature Fields for Vision-and-Language Navigation

CoRL 2024poster

Vision-and-language navigation (VLN) enables the agent to navigate to a remote location in 3D environments following the natural language instruction. In this field, the agent is usually trained and evaluated in the navigation simulators, lacking effective approaches for sim-to-real transfer. The VL…

Cited by 11SourcecodeScholar
2023

GridMM: Grid Memory Map for Vision-and-Language Navigation

ICCV 2023poster

Vision-and-language navigation (VLN) enables the agent to navigate to a remote location following the natural language instruction in 3D environments. To represent the previously visited environment, most approaches for VLN implement memory using recurrent states, topological maps, or top-down seman…

Cited by 59PDFcodeScholar
2023

KERM: Knowledge Enhanced Reasoning for Vision-and-Language Navigation

CVPR 2023poster

Vision-and-language navigation (VLN) is the task to enable an embodied agent to navigate to a remote location following the natural language instruction in real scenes. Most of the previous approaches utilize the entire features or object-centric features to represent navigable candidates. However,…

2023

Plug-and-Play Document Modules for Pre-trained Models

ACL 2023long

Large-scale pre-trained models (PTMs) have been widely used in document-oriented NLP tasks, such as question answering. However, the encoding-task coupling requirement results in the repeated encoding of the same documents for different tasks and queries, which is highly computationally inefficient.…

2022

BinauralGrad: A Two-Stage Conditional Diffusion Probabilistic Model for Binaural Audio Synthesis

NeurIPS 2022accept

Binaural audio plays a significant role in constructing immersive augmented and virtual realities. As it is expensive to record binaural audio from the real world, synthesizing them from mono audio has attracted increasing attention. This synthesis process involves not only the basic physical warpin…

2022

Contrastive Learning enhanced Author-Style Headline Generation

EMNLP 2022main

Headline generation is a task of generating an appropriate headline for a given article, which can be further used for machine-aided writing or enhancing the click-through ratio. Current works only use the article itself in the generation, but have not taken the writing style of headlines into consi…

2021

FastCorrect: Fast Error Correction with Edit Alignment for Automatic Speech Recognition

NeurIPS 2021poster

Error correction techniques have been used to refine the output sentences from automatic speech recognition (ASR) models and achieve a lower word error rate (WER) than original ASR outputs. Previous works usually use a sequence-to-sequence model to correct an ASR output sentence autoregressively, wh…

2021

Label-Aware Text Representation for Multi-Label Text Classification

ICASSP 2021accepted

Multi-label text classification (MLTC) is an important task in natural language processing (NLP), which is appealing to researchers in both academia and industry. However, few of studies have been conducted on the relations among the labels. Most of existing methods tend to neglect the semantic info…

Cited by 0SourceScholar