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Wentao Ma

16 accepted papers

2026

Rethinking Data Curation in LLM Training: Online Reweighting Offers Better Generalization than Offline Methods

ICLR 2026poster

Data curation is a critical yet underexplored component in large language model (LLM) training. Existing approaches (such as data selection and data mixing) operate in an offline paradigm, decoupled from the training process. This separation introduces extra engineering overhead and makes curated su…

Cited by 0SourcecodeScholar
2025

CrossHash: Cross-scale Vision Transformer Hashing for Image Retrieval

ICASSP 2025accepted

Transformers have made significant progress in dealing with computer vision tasks. However, most existing Vision Transformers (ViT) typically focus on single-scale information, limiting their capability to model interactions when processing multi-scale features. Moreover, the explicit mapping of con…

Cited by 0SourceScholar
2025

EPO: Explicit Policy Optimization for Strategic Reasoning in LLMs via Reinforcement Learning

ACL 2025long

Large Language Models (LLMs) have shown impressive reasoning capabilities in well-defined problems with clear solutions, such as mathematics and coding. However, they still struggle with complex real-world scenarios like business negotiations, which require strategic reasoning—an ability to navigate…

2025

SDPO: Segment-Level Direct Preference Optimization for Social Agents

ACL 2025long

Social agents powered by large language models (LLMs) can simulate human social behaviors but fall short in handling complex social dialogues. Direct Preference Optimization (DPO) has proven effective in aligning LLM behavior with human preferences across various agent tasks. However, standard DPO f…

2025

Vamba: Understanding Hour-Long Videos with Hybrid Mamba-Transformers

ICCV 2025poster

State-of-the-art transformer-based large multimodal models (LMMs) struggle to handle hour-long video inputs due to the quadratic complexity of the causal self-attention operations, leading to high computational costs during training and inference. Existing token compression-based methods reduce the…

Cited by 0SourcePDFScholar
2024

FlowBench: Revisiting and Benchmarking Workflow-Guided Planning for LLM-based Agents

EMNLP 2024finding

LLM-based agents have emerged as promising tools, which are crafted to fulfill complex tasks by iterative planning and action. However, these agents are susceptible to undesired planning hallucinations when lacking specific knowledge for expertise-intensive tasks. To address this, preliminary attemp…

2024

Self-Explanation Prompting Improves Dialogue Understanding in Large Language Models

COLING 2024main

Task-oriented dialogue (TOD) systems facilitate users in executing various activities via multi-turn dialogues, but Large Language Models (LLMs) often struggle to comprehend these intricate contexts. In this study, we propose a novel “Self-Explanation” prompting strategy to enhance the comprehension…

Cited by 12SourcePDFScholar
2024

Text-Based Occluded Person Re-identification via Multi-Granularity Contrastive Consistency Learning

AAAI 2024technical

Text-based Person Re-identification (T-ReID), which aims at retrieving a specific pedestrian image from a collection of images via text-based information, has received significant attention. However, previous research has overlooked a challenging yet practical form of T-ReID: dealing with image gall…

2024

UniPCM: Universal Pre-trained Conversation Model with Task-aware Automatic Prompt

COLING 2024main

Recent researches have shown that multi-task instruction tuning after pre-training greatly improves the model’s robustness and transfer ability, which is crucial for building a high-quality dialog system. However, most previous works on multi-task instruction tuning rely heavily on human-defined inp…

2023

Learning To Exploit the Sequence-Specific Prior Knowledge for Image Processing Pipelines Optimization

CVPR 2023poster

The hardware image signal processing (ISP) pipeline is the intermediate layer between the imaging sensor and the downstream application, processing the sensor signal into an RGB image. The ISP is less programmable and consists of a series of processing modules. Each processing module handles a subta…

Cited by 7SourcePDFScholar
2023

Speech-Text Pre-training for Spoken Dialog Understanding with Explicit Cross-Modal Alignment

ACL 2023long

Recently, speech-text pre-training methods have shown remarkable success in many speech and natural language processing tasks. However, most previous pre-trained models are usually tailored for one or two specific tasks, but fail to conquer a wide range of speech-text tasks. In addition, existing sp…

Cited by 20SourcePDFScholar
2023

SpokenWOZ: A Large-Scale Speech-Text Benchmark for Spoken Task-Oriented Dialogue Agents

NeurIPS 2023poster

Task-oriented dialogue (TOD) models have made significant progress in recent years. However, previous studies primarily focus on datasets written by annotators, which has resulted in a gap between academic research and real-world spoken con- versation scenarios. While several small-scale spoken TOD…

2020

A Sentence Cloze Dataset for Chinese Machine Reading Comprehension

COLING 2020main

Owing to the continuous efforts by the Chinese NLP community, more and more Chinese machine reading comprehension datasets become available. To add diversity in this area, in this paper, we propose a new task called Sentence Cloze-style Machine Reading Comprehension (SC-MRC). The proposed task aims…

2020

CharBERT: Character-aware Pre-trained Language Model

COLING 2020main

Most pre-trained language models (PLMs) construct word representations at subword level with Byte-Pair Encoding (BPE) or its variations, by which OOV (out-of-vocab) words are almost avoidable. However, those methods split a word into subword units and make the representation incomplete and fragile.…