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Jiajun Zhang

72 accepted papers

2026

Benchmarking the Limits of In-Context Reinforcement Learning for Ad-Hoc Teamwork

ICML 2026poster

In-Context Reinforcement Learning (ICRL) has enabled foundation agents to adapt instantaneously to novel tasks, yet its efficacy in Ad-Hoc Teamwork (AHT)—where coordination with unknown partners is required—remains unexplored. To rigorously evaluate this, we introduce a large-scale benchmark **ICRL4…

Cited by 0SourceScholar
2026

Beyond Multiple Choice: Verifiable OpenQA for Robust Vision-Language RFT

CVPR 2026

Multiple-choice question answering (MCQA) has been a popular format for evaluating and reinforcement fine-tuning (RFT) of modern multimodal language models. Its constrained output format allows for simplified, deterministic automatic verification.However, we find that the options may leak exploitabl

Cited by 0SourceScholar
2026

Bringing Code ALIVE: Optimizing Interactive Frontend Mini-Games via Automated Play and Reinforcement Learning at Scale

ICML 2026poster

The rapid evolution of Large Language Models (LLMs) has empowered even non-programmers to create visually appealing frontend mini-games with a single instruction. However, open-source models significantly lag behind proprietary counterparts in this domain. The core bottleneck is the lack of an evalu…

Cited by 0SourceScholar
2026

Context Tokens are Anchors: Understanding the Repetition Curse in Diffusion MLLMs from an Information Flow Perspective

ICLR 2026poster

Recent diffusion-based Multimodal Large Language Models (dMLLMs) suffer from high inference latency and therefore rely on caching techniques to accelerate decoding. However, the application of cache mechanisms often introduces undesirable repetitive text generation, a phenomenon we term the Repeat C…

Cited by 0SourcecodeScholar
2026

CueBench: Advancing Unified Understanding of Context-Aware Video Anomalies in Real-World

AAAI 2026technical

How far are deep models from real-world video anomaly understanding (VAU)? Current works typically emphasize detecting unexpected occurrences deviating from normal patterns or comprehending anomalous events with interpretable descriptions. However, they exhibit only a superficial comprehension of re

Cited by 0SourcePDFScholar
2026

EditScore: Unlocking Online RL for Image Editing via High-Fidelity Reward Modeling

ICLR 2026poster

Instruction-guided image editing has achieved remarkable progress, yet current models still face challenges with complex instructions and often require multiple samples to produce a desired result. Reinforcement Learning (RL) offers a promising solution, but its adoption in image editing has been se…

Cited by 0SourcecodeScholar
2026

GAF: Gaussian Action Field As a 4D Representation for Dynamic World Modeling in Robotic Manipulation

ICRA 2026poster

Accurate scene perception is critical for vision-based robotic manipulation. Existing approaches typically follow either a Vision-to-Action V-A paradigm, predicting actions directly from visual inputs, or a Vision-to-3D-to-Action V-3D-A paradigm, leveraging intermediate 3D representations. However, …

2026

HUMORCHAIN: Theory-Guided Multi-Stage Reasoning for Interpretable Multimodal Humor Generation

CVPR 2026

Humor, as both a creative human activity and a social binding mechanism, has long posed a major challenge for AI generation. Although producing humor requires complex cognitive reasoning and social understanding, theories of humor suggest that it follows learnable patterns and structures, making it

Cited by 0SourceScholar
2026

LENS: Multi-level Evaluation of Multimodal Reasoning with Large Language Models

ICLR 2026poster

Multimodal Large Language Models (MLLMs) have achieved significant advances in integrating visual and linguistic information, yet their ability to reason about complex and real-world scenarios remains limited. Existing benchmarks are usually constructed in a task-oriented manner, without a guarantee…

Cited by 0SourceScholar
2026

Learning Cross-View Object Correspondence via Cycle-Consistent Mask Prediction

CVPR 2026

We study the task of establishing object-level visual correspondence across different viewpoints in videos, focusing on the challenging egocentric-to-exocentric and exocentric-to-egocentric scenarios. We propose a simple yet effective framework based on conditional binary segmentation, where an obje

Cited by 0SourcecodeScholar
2026

Learning Dynamics of Logits Debiasing for Long-Tailed Semi-Supervised Learning

ICLR 2026poster

Long-tailed distributions are prevalent in real-world semi-supervised learning (SSL), where pseudo-labels tend to favor majority classes, leading to degraded generalization. Although numerous long-tailed SSL (LTSSL) methods have been proposed, the underlying mechanisms of class bias remain underexpl…

Cited by 0SourceScholar
2026

OmniGen2: Towards Instruction-Aligned Multimodal Generation

CVPR 2026

Multimodal generative models can process instructions in various modalities and demonstrate outstanding performance across a wide range of image generation tasks. However, their robustness in complex real-world scenarios remains limited due to insufficient generalized instruction alignment. We intro

Cited by 0SourcecodeScholar
2026

PlotCraft: Pushing the Limits of LLMs for Complex and Interactive Data Visualization

ICML 2026poster

Recent Large Language Models (LLMs) have demonstrated remarkable proficiency in code generation. However, their ability to create complex visualizations for scaled and structured data remains largely unevaluated and underdeveloped. To address this gap, we introduce **PlotCraft**, a new benchmark fea…

Cited by 0SourceScholar
2026

SAMAS: A SPECTRUM-GUIDED MULTI-AGENT SYSTEM FOR ACHIEVING STYLE FIDELITY IN LITERARY TRANSLATION

ICASSP 2026poster

Modern large language models (LLMs) excel at generating fluent and faithful translations. However, they struggle to preserve an author's unique literary style, often producing semantically correct but generic outputs. This limitation stems from the inability of current single-model and static multi-…

Cited by 0SourcePDFScholar
2026

Scaling Agentic Verifier for Competitive Coding

ICML 2026poster

Large language models (LLMs) have demonstrated strong coding capabilities but still struggle to solve competitive programming problems correctly in a single attempt. Execution-based re-ranking offers a promising test-time scaling strategy, yet existing methods are constrained by either difficult tes…

Cited by 0SourceScholar
2026

SharpTimeGS: Sharp and Stable Dynamic Gaussian Splatting via Lifespan Modulation

CVPR 2026

Novel view synthesis of dynamic scenes is fundamental to achieving photorealistic 4D reconstruction and immersive visual experiences. Recent progress in Gaussian-based representations has significantly improved real-time rendering quality, yet existing methods still struggle to maintain a balance be

Cited by 0SourceScholar
2026

Synthesizing Multimodal Geometry Datasets from Scratch and Enabling Visual Alignment via Plotting Code

ICML 2026poster

Multimodal geometry reasoning requires models to jointly understand visual diagrams and perform structured symbolic inference, yet current vision--language models struggle with complex geometric constructions due to limited training data and weak visual--symbolic alignment. We propose a pipeline for…

Cited by 0SourceScholar
2026

UNSEEN: Enhancing Dataset Pruning from a Generalization Perspective

AAAI 2026technical

The growing scale of datasets in deep learning has introduced significant computational challenges. Dataset pruning addresses this challenge by constructing a compact but informative coreset from the full dataset with comparable performance. Previous approaches typically establish scoring metrics ba

Cited by 0SourcePDFScholar
2025

An Efficient and Precise Training Data Construction Framework for Process-supervised Reward Model in Mathematical Reasoning

ACL 2025long

Enhancing the mathematical reasoning capabilities of Large Language Models (LLMs) is of great scientific and practical significance. Researchers typically employ process-supervised reward models (PRMs) to guide the reasoning process, effectively improving the models’ reasoning abilities. However, ex…

2025

COIG-CQIA: Quality is All You Need for Chinese Instruction Fine-tuning

NAACL 2025findings

Remarkable progress on large language models (LLMs), particularly in English, has facilitated impressive capabilities in following human instructions. However, there remains a noticeable gap in instruction fine-tuning for Chinese, where the complex linguistic features pose significant challenges. Ex…

2025

Data Whisperer: Efficient Data Selection for Task-Specific LLM Fine-Tuning via Few-Shot In-Context Learning

ACL 2025long

Fine-tuning large language models (LLMs) on task-specific data is essential for their effective deployment. As dataset sizes grow, efficiently selecting optimal subsets for training becomes crucial to balancing performance and computational costs. Traditional data selection methods often require fin…

2025

Enhancing Knowledge Distillation of Large Language Models through Efficient Multi-Modal Distribution Alignment

COLING 2025main

Knowledge distillation (KD) is an effective model compression method that can transfer the internal capabilities of large language models (LLMs) to smaller ones. However, the multi-modal probability distribution predicted by teacher LLMs causes difficulties for student models to learn. In this paper…

2025

Group then Scale: Dynamic Mixture-of-Experts Multilingual Language Model

ACL 2025finding

The curse of multilinguality phenomenon is a fundamental problem of multilingual Large Language Models (LLMs), where the competition between massive languages results in inferior performance. It mainly comes from limited capacity and negative transfer between dissimilar languages. To address this is…

Cited by 0SourcePDFScholar
2025

Hit the Sweet Spot! Span-Level Ensemble for Large Language Models

COLING 2025main

Ensembling various LLMs to unlock their complementary potential and leverage their individual strengths is highly valuable. Previous studies typically focus on two main paradigms: sample-level and token-level ensembles. Sample-level ensemble methods either select or blend fully generated outputs, wh…

2025

Implicit Cross-Lingual Rewarding for Efficient Multilingual Preference Alignment

ACL 2025finding

Direct Preference Optimization (DPO) has become a prominent method for aligning Large Language Models (LLMs) with human preferences. While DPO has enabled significant progress in aligning English LLMs, multilingual preference alignment is hampered by data scarcity. To address this, we propose a nove…

2025

KTAE: A Model-Free Algorithm to Key-Tokens Advantage Estimation in Mathematical Reasoning

NeurIPS 2025poster

Recent advances have demonstrated that integrating reinforcement learning with rule-based rewards can significantly enhance the reasoning capabilities of large language models (LLMs), even without supervised fine-tuning (SFT). However, prevalent reinforcement learning algorithms such as GRPO and its…

Cited by 0SourcecodeScholar
2025

LADM: Long-context Training Data Selection with Attention-based Dependency Measurement for LLMs

ACL 2025long

Long-context modeling has drawn more and more attention in the area of Large Language Models (LLMs). Continual training with long-context data becomes the de-facto method to equip LLMs with the ability to process long inputs. However, it still remains an open challenge to measure the quality of long…

Cited by 0SourcePDFScholar
2025

LAGCL4Rec: When LLMs Activate Interactions Potential in Graph Contrastive Learning for Recommendation

EMNLP 2025

A core barrier preventing recommender systems from reaching their full potential lies in the inherent limitations of user-item interaction data: (1) Sparse user-item interactions, making it difficult to learn reliable user preferences; (2) Traditional contrastive learning methods often treat negativ

Cited by 0SourcePDFScholar
2025

LR²Bench: Evaluating Long-chain Reflective Reasoning Capabilities of Large Language Models via Constraint Satisfaction Problems

ACL 2025finding

Recent progress in o1-like models has significantly enhanced the reasoning abilities of Large Language Models (LLMs), empowering them to tackle increasingly complex tasks through reflection capabilities, such as making assumptions, backtracking, and self-refinement. However, effectively evaluating s…

Cited by 0SourcePDFScholar
2025

Language Imbalance Driven Rewarding for Multilingual Self-improving

ICLR 2025poster

Large Language Models (LLMs) have achieved state-of-the-art performance across numerous tasks. However, these advancements have predominantly benefited "first-class" languages such as English and Chinese, leaving many other languages underrepresented. This imbalance, while limiting broader applicati…

2025

Look Again, Think Slowly: Enhancing Visual Reflection in Vision-Language Models

EMNLP 2025

Recent advances in text-only “slow-thinking” reasoning have prompted efforts to transfer this capability to vision-language models (VLMs), for training visual reasoning models (VRMs). However, such transfer faces critical challenges: Effective “slow thinking” in VRMs requires visual reflection, the

2025

ManiVideo: Generating Hand-Object Manipulation Video with Dexterous and Generalizable Grasping

CVPR 2025highlight

In this paper, we introduce ManiVideo, a novel method for generating consistent and temporally coherent bimanual hand-object manipulation videos from given motion sequences of hands and objects. The core idea of ManiVideo is the construction of a multi-layer occlusion (MLO) representation that learn…

Cited by 1SourcePDFScholar
2025

Negative Feedback Really Matters: Signed Dual-Channel Graph Contrastive Learning Framework for Recommendation

NeurIPS 2025poster

Traditional recommender systems have relied heavily on positive feedback for learning user preferences, while the abundance of negative feedback in real-world scenarios remains underutilized. To address this limitation, recent years have witnessed increasing attention on leveraging negative feedback…

Cited by 0SourceScholar
2025

SpikeLLM: Scaling up Spiking Neural Network to Large Language Models via Saliency-based Spiking

ICLR 2025poster

Recent advancements in large language models (LLMs) with billions of parameters have improved performance in various applications, but their inference processes demand significant energy and computational resources. In contrast, the human brain, with approximately 86 billion neurons, is much more en…

2025

Synthesizing Software Engineering Data in a Test-Driven Manner

ICML 2025poster

We introduce **SWE-Flow**, a novel data synthesis framework grounded in Test-Driven Development (TDD). Unlike existing software engineering data that rely on human-submitted issues, **SWE-Flow** automatically infers incremental development steps directly from unit tests, which inherently encapsulate…

2025

Teaching Vision-Language Models to Ask: Resolving Ambiguity in Visual Questions

ACL 2025long

In visual question answering (VQA) context, users often pose ambiguous questions to visual language models (VLMs) due to varying expression habits. Existing research addresses such ambiguities primarily by rephrasing questions. These approaches neglect the inherently interactive nature of user inter…

2025

Tensiworm: A Novel Tensegrity Robot with Enhanced Peristaltic Locomotion Efficiency

ICRA 2025

Tensegrity structures have been widely explored for their lightweight, high-stiffness, and foldable properties. These unique characteristics have enabled their application in various fields including robotics. Tensegrity robots have demonstrated diverse locomotion modes offering versatile solutions

Cited by 0SourceScholar
2024

BLSP-Emo: Towards Empathetic Large Speech-Language Models

EMNLP 2024main

The recent release of GPT-4o showcased the potential of end-to-end multimodal models, not just in terms of low latency but also in their ability to understand and generate expressive speech with rich emotions. While the details are unknown to the open research community, it likely involves significa…

2024

BiPFT: Binary Pre-trained Foundation Transformer with Low-Rank Estimation of Binarization Residual Polynomials

AAAI 2024technical

Pretrained foundation models offer substantial benefits for a wide range of downstream tasks, which can be one of the most potential techniques to access artificial general intelligence. However, scaling up foundation transformers for maximal task-agnostic knowledge has brought about computational c…

2024

CIF-Bench: A Chinese Instruction-Following Benchmark for Evaluating the Generalizability of Large Language Models

ACL 2024findings

The advancement of large language models (LLMs) has enhanced the ability to generalize across a wide range of unseen natural language processing (NLP) tasks through instruction-following.Yet, their effectiveness often diminishes in low-resource languages like Chinese, exacerbated by biased evaluatio…

2024

Improving In-context Learning of Multilingual Generative Language Models with Cross-lingual Alignment

NAACL 2024long

Multilingual generative models obtain remarkable cross-lingual in-context learning capabilities through pre-training on large-scale corpora. However, they still exhibit a performance bias toward high-resource languages and learn isolated distributions of multilingual sentence representations, which…

2024

Large Language Models Know What is Key Visual Entity: An LLM-assisted Multimodal Retrieval for VQA

EMNLP 2024main

Visual question answering (VQA) tasks, often performed by visual language model (VLM), face challenges with long-tail knowledge. Recent retrieval-augmented VQA (RA-VQA) systems address this by retrieving and integrating external knowledge sources. However, these systems still suffer from redundant v…

Cited by 3SourcePDFScholar
2024

ProxyCap: Real-time Monocular Full-body Capture in World Space via Human-Centric Proxy-to-Motion Learning

CVPR 2024poster

Learning-based approaches to monocular motion capture have recently shown promising results by learning to regress in a data-driven manner. However due to the challenges in data collection and network designs it remains challenging to achieve real-time full-body capture while being accurate in world…

Cited by 13SourcePDFScholar
2024

SpikeLM: Towards General Spike-Driven Language Modeling via Elastic Bi-Spiking Mechanisms

ICML 2024poster

Towards energy-efficient artificial intelligence similar to the human brain, the bio-inspired spiking neural networks (SNNs) have advantages of biological plausibility, event-driven sparsity, and binary activation. Recently, large-scale language models exhibit promising generalization capability, ma…

2024

X-Instruction: Aligning Language Model in Low-resource Languages with Self-curated Cross-lingual Instructions

ACL 2024findings

Large language models respond well in high-resource languages like English but struggle in low-resource languages. It may arise from the lack of high-quality instruction following data in these languages. Directly translating English samples into these languages can be a solution but unreliable, lea…

2023

Parameter-efficient Tuning for Large Language Model without Calculating Its Gradients

EMNLP 2023long main

Fine-tuning all parameters of large language models (LLMs) requires significant computational resources and is time-consuming. Recent parameter-efficient tuning methods such as Adapter tuning, Prefix tuning, and LoRA allow for updating a small subset of parameters in large language models. However,…

Cited by 0SourceScholar
2023

Take a Closer Look at Multilinguality! Improve Multilingual Pre-Training Using Monolingual Corpora Only

EMNLP 2023long findings

Recent studies have revealed the remarkable cross-lingual capability of multilingual pre-trained language models (mPLMs), even when pre-trained without parallel corpora (mono-mPLMs). Intuitively, semantic alignments may be the reason behind such capability but remain under-explored. In this work, we…

Cited by 0SourceScholar
2023

Unified Prompt Learning Makes Pre-Trained Language Models Better Few-Shot Learners

ICASSP 2023accepted

Language prompting induces the model to produce a textual output during the training phase, which achieves remarkable performance in few-shot learning scenarios. However, current prompt-based methods either use the same task-specific prompts for each instance, losing the particularity of instance-de…

Cited by 0SourceScholar
2022

Addressing Asymmetry in Multilingual Neural Machine Translation with Fuzzy Task Clustering

COLING 2022main

Multilingual neural machine translation (NMT) enables positive knowledge transfer among multiple translation tasks with a shared underlying model, but a unified multilingual model usually suffers from capacity bottleneck when tens or hundreds of languages are involved. A possible solution is to clus…

2022

Cross-Modal Cloze Task: A New Task to Brain-to-Word Decoding

ACL 2022findings

Decoding language from non-invasive brain activity has attracted increasing attention from both researchers in neuroscience and natural language processing. Due to the noisy nature of brain recordings, existing work has simplified brain-to-word decoding as a binary classification task which is to di…

2022

Discrete Cross-Modal Alignment Enables Zero-Shot Speech Translation

EMNLP 2022main

End-to-end Speech Translation (ST) aims at translating the source language speech into target language text without generating the intermediate transcriptions. However, the training of end-to-end methods relies on parallel ST data, which are difficult and expensive to obtain. Fortunately, the superv…

2022

Learning Confidence for Transformer-based Neural Machine Translation

ACL 2022long

Confidence estimation aims to quantify the confidence of the model prediction, providing an expectation of success. A well-calibrated confidence estimate enables accurate failure prediction and proper risk measurement when given noisy samples and out-of-distribution data in real-world settings. Howe…

2022

Other Roles Matter! Enhancing Role-Oriented Dialogue Summarization via Role Interactions

ACL 2022long

Role-oriented dialogue summarization is to generate summaries for different roles in the dialogue, e.g., merchants and consumers. Existing methods handle this task by summarizing each role’s content separately and thus are prone to ignore the information from other roles. However, we believe that ot…

2022

Probing Word Syntactic Representations in the Brain by a Feature Elimination Method

AAAI 2022technical

Neuroimaging studies have identified multiple brain regions that are associated with semantic and syntactic processing when comprehending language. However, existing methods cannot explore the neural correlates of fine-grained word syntactic features, such as part-of-speech and dependency relations.…

Cited by 16SourcePDFScholar
2021

Attention Calibration for Transformer in Neural Machine Translation

ACL 2021long

Attention mechanisms have achieved substantial improvements in neural machine translation by dynamically selecting relevant inputs for different predictions. However, recent studies have questioned the attention mechanisms’ capability for discovering decisive inputs. In this paper, we propose to cal…

2021

Bilingual Mutual Information Based Adaptive Training for Neural Machine Translation

ACL 2021short

Recently, token-level adaptive training has achieved promising improvement in machine translation, where the cross-entropy loss function is adjusted by assigning different training weights to different tokens, in order to alleviate the token imbalance problem. However, previous approaches only use s…

2021

CSDS: A Fine-Grained Chinese Dataset for Customer Service Dialogue Summarization

EMNLP 2021main

Dialogue summarization has drawn much attention recently. Especially in the customer service domain, agents could use dialogue summaries to help boost their works by quickly knowing customer’s issues and service progress. These applications require summaries to contain the perspective of a single sp…

2021

Entity-level Cross-modal Learning Improves Multi-modal Machine Translation

EMNLP 2021finding

Multi-modal machine translation (MMT) aims at improving translation performance by incorporating visual information. Most of the studies leverage the visual information through integrating the global image features as auxiliary input or decoding by attending to relevant local regions of the image. H…

Cited by 12SourcePDFScholar
2021

Synchronous Interactive Decoding for Multilingual Neural Machine Translation

AAAI 2021technical

To simultaneously translate a source language into multiple different target languages is one of the most common scenarios of multilingual translation. However, existing methods cannot make full use of translation model information during decoding, such as intra-lingual and inter-lingual future info…

2020

Distill and Replay for Continual Language Learning

COLING 2020main

Accumulating knowledge to tackle new tasks without necessarily forgetting the old ones is a hallmark of human-like intelligence. But the current dominant paradigm of machine learning is still to train a model that works well on static datasets. When learning tasks in a stream where data distribution…

2020

Knowledge Graph Enhanced Neural Machine Translation via Multi-task Learning on Sub-entity Granularity

COLING 2020main

Previous studies combining knowledge graph (KG) with neural machine translation (NMT) have two problems: i) Knowledge under-utilization: they only focus on the entities that appear in both KG and training sentence pairs, making much knowledge in KG unable to be fully utilized. ii) Granularity mismat…

2020

Multimodal Sentence Summarization via Multimodal Selective Encoding

COLING 2020main

This paper studies the problem of generating a summary for a given sentence-image pair. Existing multimodal sequence-to-sequence approaches mainly focus on enhancing the decoder by visual signals, while ignoring that the image can improve the ability of the encoder to identify highlights of a news e…

Cited by 41SourcePDFScholar