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Zhiyang Xu

17 accepted papers

2026

LaTtE-Flow: Layerwise Timestep-Expert Flow-based Transformer

ICML 2026poster

Recent advances in multimodal foundation models unifying image understanding and generation have opened exciting avenues for tackling a wide range of vision-language tasks within a single framework. Despite progress, existing unified models typically require extensive pretraining, and many of these …

Cited by 0SourceScholar
2025

AR-RAG: Autoregressive Retrieval Augmentation for Image Generation

NeurIPS 2025poster

We introduce Autoregressive Retrieval Augmentation (AR-RAG), a novel paradigm that enhances image generation by autoregressively incorporating k-nearest neighbor retrievals at the patch level. Unlike prior methods that perform a single, static retrieval before generation and condition the entire ge…

Cited by 0SourcecodeScholar
2025

Grounded-VideoLLM: Sharpening Fine-grained Temporal Grounding in Video Large Language Models

EMNLP 2025

Despite their impressive performance in coarse-grained video understanding, Video Large Language Models (Video-LLMs) still face challenges in fine-grained temporal grounding, including ineffective temporal modeling and inadequate timestamp representations. In this work, we introduce Grounded-VideoLL

2025

Modality-Specialized Synergizers for Interleaved Vision-Language Generalists

ICLR 2025poster

Recent advancements in Vision-Language Models (VLMs) have led to the emergence of Vision-Language Generalists (VLGs) capable of understanding and generating both text and images. However, seamlessly generating an arbitrary sequence of text and images remains a challenging task for the current VLGs.…

Cited by 0SourcePDFScholar
2025

R2I-Bench: Benchmarking Reasoning-Driven Text-to-Image Generation

EMNLP 2025

Reasoning is a fundamental capability often required in real-world text-to-image (T2I) generation, e.g., generating “a bitten apple that has been left in the air for more than a week” necessitates understanding temporal decay and commonsense concepts. While recent T2I models have made impressive pro

Cited by 0SourcePDFScholar
2025

SPARTUN3D: Situated Spatial Understanding of 3D World in Large Language Model

ICLR 2025poster

Integrating the 3D world into large language models (3D-based LLMs) has been a promising research direction for 3D scene understanding. However, current 3D-based LLMs fall short in situated understanding due to two key limitations: 1) existing 3D datasets are constructed from a global perspective of…

Cited by 6SourcePDFScholar
2025

UniHGKR: Unified Instruction-aware Heterogeneous Knowledge Retrievers

NAACL 2025long

Existing information retrieval (IR) models often assume a homogeneous structure for knowledge sources and user queries, limiting their applicability in real-world settings where retrieval is inherently heterogeneous and diverse. In this paper, we introduce UniHGKR, a unified instruction-aware hetero…

2024

Holistic Evaluation for Interleaved Text-and-Image Generation

EMNLP 2024main

Interleaved text-and-image generation has been an intriguing research direction, where the models are required to generate both images and text pieces in an arbitrary order. Despite the emerging advancements in interleaved generation, the progress in its evaluation still significantly lags behind. E…

Cited by 6SourcePDFScholar
2024

MULTISCRIPT: Multimodal Script Learning for Supporting Open Domain Everyday Tasks

AAAI 2024technical

Automatically generating scripts (i.e. sequences of key steps described in text) from video demonstrations and reasoning about the subsequent steps are crucial to the modern AI virtual assistants to guide humans to complete everyday tasks, especially unfamiliar ones. However, current methods for gen…

2024

Multimodal Instruction Tuning with Conditional Mixture of LoRA

ACL 2024long

Multimodal Large Language Models (MLLMs) have demonstrated remarkable proficiency in diverse tasks across different domains, with an increasing focus on improving their zero-shot generalization capabilities for unseen multimodal tasks. Multimodal instruction tuning has emerged as a successful strate…

2024

Vision-Flan: Scaling Human-Labeled Tasks in Visual Instruction Tuning

ACL 2024findings

Despite vision-language models’ (VLMs) remarkable capabilities as versatile visual assistants, two substantial challenges persist within the existing VLM frameworks: (1) lacking task diversity in pretraining and visual instruction tuning, and (2) annotation error and bias in GPT-4 synthesized instru…

Cited by 34SourcePDFScholar
2024

X-Eval: Generalizable Multi-aspect Text Evaluation via Augmented Instruction Tuning with Auxiliary Evaluation Aspects

NAACL 2024long

Natural Language Generation (NLG) typically involves evaluating the generated text in various aspects (e.g., consistency and naturalness) to obtain a comprehensive assessment. However, multi-aspect evaluation remains challenging as it may require the evaluator to generalize to any given evaluation a…

2023

Learning from a Friend: Improving Event Extraction via Self-Training with Feedback from Abstract Meaning Representation

ACL 2023findings

Data scarcity has been the main factor that hinders the progress of event extraction. To overcome this issue, we propose a Self-Training with Feedback (STF) framework that leverages the large-scale unlabeled data and acquires feedback for each new event prediction from the unlabeled data by comparin…

2023

MultiInstruct: Improving Multi-Modal Zero-Shot Learning via Instruction Tuning

ACL 2023long

Instruction tuning, a new learning paradigm that fine-tunes pre-trained language models on tasks specified through instructions, has shown promising zero-shot performance on various natural language processing tasks. However, it has yet to be explored for vision and multimodal tasks. In this work, w…

2023

The Art of SOCRATIC QUESTIONING: Recursive Thinking with Large Language Models

EMNLP 2023long main

Chain-of-Thought (CoT) prompting enables large language models to solve complex reasoning problems by generating intermediate steps. However, confined by its inherent single-pass and sequential generation process, CoT heavily relies on the initial decisions, causing errors in early steps to accumula…

Cited by 0SourcecodeScholar
2022

Structured Energy Network As a Loss

NeurIPS 2022accept

Belanger & McCallum (2016) and Gygli et al. (2017) have shown that an energy network can capture arbitrary dependencies amongst the output variables in structured prediction; however, their reliance on gradient-based inference (GBI) makes the inference slow and unstable. In this work, we propose Str…

Cited by 4SourcePDFScholar
2021

Improved Latent Tree Induction with Distant Supervision via Span Constraints

EMNLP 2021main

For over thirty years, researchers have developed and analyzed methods for latent tree induction as an approach for unsupervised syntactic parsing. Nonetheless, modern systems still do not perform well enough compared to their supervised counterparts to have any practical use as structural annotatio…