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Xingshan Zeng

27 accepted papers

2026

From Verifiable Dot to Reward Chain: Harnessing Verifiable Reference-based Rewards for Reinforcement Learning of Open-ended Generation

ICLR 2026poster

Reinforcement learning with verifiable rewards (RLVR) succeeds in reasoning tasks (e.g., math and code) by checking the final verifiable answer (i.e., a verifiable dot signal). However, extending this paradigm to open-ended generation is challenging because there is no unambiguous ground truth. Rely…

Cited by 0SourcecodeScholar
2026

Memory-T1: Reinforcement Learning for Temporal Reasoning in Multi-session Agents

ICLR 2026poster

Temporal reasoning over long, multi-session dialogues is a critical capability for conversational agents. As dialogue histories grow in length and accumulate noise, existing long-context models struggle to accurately identify temporally pertinent information, significantly impairing reasoning perfor…

Cited by 0SourcecodeScholar
2026

ToolACE-MT: Non-Autoregressive Generation for Agentic Multi-Turn Interaction

ICLR 2026poster

Agentic task-solving with Large Language Models (LLMs) requires multi-turn, multi-step interactions, often involving complex function calls and dynamic user-agent exchanges. Existing simulation-based data generation methods for such scenarios rely heavily on costly autoregressive interactions betwee…

Cited by 0SourcecodeScholar
2026

ToolACE-R: Model-aware Iterative Training and Adaptive Refinement for Tool learning

AAAI 2026technical

Tool learning, which allows Large Language Models (LLMs) to leverage external tools for solving complex user tasks, has emerged as a promising avenue for extending model capabilities. However, existing approaches primarily focus on data synthesis for fine-tuning LLMs to invoke tools effectively, lar

Cited by 0SourcePDFScholar
2025

ACEBench: A Comprehensive Evaluation of LLM Tool Usage

EMNLP 2025

Large Language Models (LLMs) have demonstrated significant potential in decision-making and reasoning, particularly when integrated with various tools to effectively solve complex problems. However, existing benchmarks for evaluating LLMs’ tool usage face several limitations: (1) limited evaluation

Cited by 0SourcePDFScholar
2025

Bridging and Modeling Correlations in Pairwise Data for Direct Preference Optimization

ICLR 2025poster

Direct preference optimization (DPO), a widely adopted offline preference optimization algorithm, aims to align large language models (LLMs) with human-desired behaviors using pairwise preference data. However, the generation of the winning response and the losing response within pairwise data are t…

2025

Chain-of-Probe: Examining the Necessity and Accuracy of CoT Step-by-Step

NAACL 2025findings

Current research found the issue of Early Answering in large language models (LLMs), where the models already have an answer before generating the Chain-of-Thought (CoT). This phenomenon suggests a potential lack of necessary dependency between the predicted answer and the reasoning process. Consequ…

Cited by 3SourcePDFScholar
2025

Do Mentioned Items Truly Matter? Enhancing Conversational Recommender Systems with Causal Intervention and Large Language Models

IJCAI 2025

Conversational Recommender Systems (CRS) have become increasingly important due to their ability to recommend items through interactive dialogue, adapting to user preferences in real time. Traditional CRS approaches face challenges in generating high-quality, diverse responses due to the limited ava

Cited by 0SourcePDFScholar
2025

Selective Forgetting: Advancing Machine Unlearning Techniques and Evaluation in Language Models

AAAI 2025technical

This paper explores Machine Unlearning (MU), an emerging field that is gaining increased attention due to concerns about neural models unintentionally remembering personal or sensitive information. We present SeUL, a novel method that enables selective and fine-grained unlearning for language models…

2025

Stepwise Reasoning Checkpoint Analysis: A Test Time Scaling Method to Enhance LLMs’ Reasoning

EMNLP 2025

Mathematical reasoning through Chain-of-Thought (CoT) has emerged as a powerful capability of Large Language Models (LLMs), which can be further enhanced through Test-Time Scaling (TTS) methods like Beam Search and DVTS. However, these methods, despite improving accuracy by allocating more computati

2025

ToolACE: Winning the Points of LLM Function Calling

ICLR 2025poster

Function calling significantly extends the application boundary of large language models (LLMs), where high-quality and diverse training data is critical for unlocking this capability. However, collecting and annotating real function-calling data is challenging, while synthetic data from existing pi…

Cited by 23SourcePDFScholar
2025

ToolFlow: Boosting LLM Tool-Calling Through Natural and Coherent Dialogue Synthesis

NAACL 2025long

Supervised fine-tuning (SFT) is a common method to enhance the tool calling capabilities of Large Language Models (LLMs), with the training data often being synthesized. The current data synthesis process generally involves sampling a set of tools, formulating a requirement based on these tools, and…

Cited by 4SourcePDFScholar
2024

FollowBench: A Multi-level Fine-grained Constraints Following Benchmark for Large Language Models

ACL 2024long

The ability to follow instructions is crucial for Large Language Models (LLMs) to handle various real-world applications. Existing benchmarks primarily focus on evaluating pure response quality, rather than assessing whether the response follows constraints stated in the instruction. To fill this re…

2024

Learning to Edit: Aligning LLMs with Knowledge Editing

ACL 2024long

Knowledge editing techniques, aiming to efficiently modify a minor proportion of knowledge in large language models (LLMs) without negatively impacting performance across other inputs, have garnered widespread attention. However, existing methods predominantly rely on memorizing the updated knowledg…

2024

M4LE: A Multi-Ability Multi-Range Multi-Task Multi-Domain Long-Context Evaluation Benchmark for Large Language Models

ACL 2024long

Managing long sequences has become an important and necessary feature for large language models (LLMs). However, assessing their ability to handle long contexts remains a challenge. This paper introduces M4LE, a Multi-ability, Multi-range, Multi-task, Multi-domain benchmark for Long-context Evaluati…

2024

MT-Eval: A Multi-Turn Capabilities Evaluation Benchmark for Large Language Models

EMNLP 2024main

Large language models (LLMs) are increasingly used for complex multi-turn conversations across diverse real-world applications. However, existing benchmarks mainly focus on single-turn evaluations, overlooking the models’ capabilities in multi-turn interactions. To address this gap, we introduce , a…

2024

Planning, Creation, Usage: Benchmarking LLMs for Comprehensive Tool Utilization in Real-World Complex Scenarios

ACL 2024findings

The recent trend of using Large Language Models (LLMs) as tool agents in real-world applications underscores the necessity for comprehensive evaluations of their capabilities, particularly in complex scenarios involving planning, creating, and using tools. However, existing benchmarks typically focu…

2023

AdaTranS: Adapting with Boundary-based Shrinking for End-to-End Speech Translation

EMNLP 2023short findings

To alleviate the data scarcity problem in End-to-end speech translation (ST), pre-training on data for speech recognition and machine translation is considered as an important technique. However, the modality gap between speech and text prevents the ST model from efficiently inheriting knowledge fro…

Cited by 0SourceScholar
2023

Improving End-to-End Speech Processing by Efficient Text Data Utilization with Latent Synthesis

EMNLP 2023long findings

Training a high performance end-to-end speech (E2E) processing model requires an enormous amount of labeled speech data, especially in the era of data-centric artificial intelligence. However, labeled speech data are usually scarcer and more expensive for collection, compared to textual data. We pro…

Cited by 0SourceScholar
2023

KGA: A General Machine Unlearning Framework Based on Knowledge Gap Alignment

ACL 2023long

Recent legislation of the “right to be forgotten” has led to the interest in machine unlearning, where the learned models are endowed with the function to forget information about specific training instances as if they have never existed in the training set. Previous work mainly focuses on computer…

2022

DIGAT: Modeling News Recommendation with Dual-Graph Interaction

EMNLP 2022finding

News recommendation (NR) is essential for online news services. Existing NR methods typically adopt a news-user representation learning framework, facing two potential limitations. First, in news encoder, single candidate news encoding suffers from an insufficient semantic information problem. Secon…

2022

Learning When and What to Quote: A Quotation Recommender System with Mutual Promotion of Recommendation and Generation

EMNLP 2022finding

This work extends the current quotation recommendation task to a more realistic quotation recommender system that learns to predict when to quote and what to quote jointly. The system consists of three modules (tasks), a prediction module to predict whether to quote given conversation contexts, a re…

2022

MLSLT: Towards Multilingual Sign Language Translation

CVPR 2022poster

Most of the research to date focuses on bilingual sign language translation (BSLT). However, such models are inefficient in building multilingual sign language translation systems. To solve this problem, we introduce the multilingual sign language translation (MSLT) task. It aims to use a single mod…

Cited by 56PDFcodeScholar
2022

Prior Knowledge and Memory Enriched Transformer for Sign Language Translation

ACL 2022findings

This paper attacks the challenging problem of sign language translation (SLT), which involves not only visual and textual understanding but also additional prior knowledge learning (i.e. performing style, syntax). However, the majority of existing methods with vanilla encoder-decoder structures fail…

Cited by 26SourcePDFScholar
2021

Neural News Recommendation with Collaborative News Encoding and Structural User Encoding

EMNLP 2021finding

Automatic news recommendation has gained much attention from the academic community and industry. Recent studies reveal that the key to this task lies within the effective representation learning of both news and users. Existing works typically encode news title and content separately while neglecti…

2021

Quotation Recommendation and Interpretation Based on Transformation from Queries to Quotations

ACL 2021short

To help individuals express themselves better, quotation recommendation is receiving growing attention. Nevertheless, most prior efforts focus on modeling quotations and queries separately and ignore the relationship between the quotations and the queries. In this work, we introduce a transformation…

2021

Re-entry Prediction for Online Conversations via Self-Supervised Learning

EMNLP 2021finding

In recent years, world business in online discussions and opinion sharing on social media is booming. Re-entry prediction task is thus proposed to help people keep track of the discussions which they wish to continue. Nevertheless, existing works only focus on exploiting chatting history and context…