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Nan Zhang

30 accepted papers

2026

Error Notebook-Guided, Training-Free Part Retrieval in 3D CAD Assemblies via Vision-Language Models

ICLR 2026poster

Effective specification-aware part retrieval within complex CAD assemblies is essential for automated engineering tasks. However, using LLMs/VLMs for this task is challenging: the metadata sequences often exceed token budgets, and fine-tuning high-performing proprietary models (e.g., GPT, Gemini) is…

Cited by 0SourceScholar
2026

Position: Generative Engine Optimization Creates Underexamined Risks, Governance Must Target Concentration, Disclosure, and Academic Blind Spots

ICML 2026poster

Large language model (LLM) answer engines are increasingly used for information seeking, shifting visibility from ranked lists to synthesized answers. This enables Generative Engine Optimization (GEO), which targets LLM answer engines' evidence pool and generation. We analyze the search engine optim…

Cited by 0SourceScholar
2026

Scene Graph Thinking: Reinforcing Structured Visual Reasoning for Multimodal Large Language Models

ICML 2026poster

Multimodal Large Language Models (MLLMs) have demonstrated strong perception and reasoning capabilities. However, most existing models focus on isolated objects and neglect structured relationships for efficient target navigation, limiting their performance on visually intensive tasks. To address th…

Cited by 0SourceScholar
2026

Similarity-Guided Structural Matching Learning for Graph Dataset Condensation

IJCAI 2026

As graph repositories grow in scale and diversity, training Graph Neural Networks (GNNs) becomes computationally demanding. However, existing graph condensation methods often fail to retain the intrinsic structural patterns of the original graphs, which are essential in graph-based learning. Therefo

Cited by 0Scholar
2026

TRIAGE: HIERARCHICAL VISUAL BUDGETING FOR EFFICIENT VIDEO REASONING IN VISION-LANGUAGE MODELS

ICASSP 2026oral

Vision-Language Models (VLMs) face significant computational challenges in video processing due to massive data redundancy, which creates prohibitively long token sequences. To address this, we introduce Triage, a training-free, plug-and-play framework that reframes video reasoning as a resource all…

Cited by 0SourcePDFScholar
2026

Vista: Scene-Aware Optimization for Streaming Video Question Answering Under Post-Hoc Queries

AAAI 2026technical

Streaming video question answering (Streaming Video QA) poses distinct challenges for multimodal large language models (MLLMs), as video frames arrive sequentially and user queries can be issued at arbitrary timepoints. Existing solutions relying on fixed-size memory or naive compression often suffe

Cited by 0SourcePDFScholar
2026

When Reasoning Meets Compression: Understanding the Effects of LLMs Compression on Large Reasoning Models

ICLR 2026poster

Compression methods, including quantization, distillation, and pruning, improve the computational efficiency of large reasoning models (LRMs). However, existing studies either fail to sufficiently compare all three compression methods on LRMs or lack in-depth interpretation analysis. In this paper,…

Cited by 0SourceScholar
2025

HRScene: How Far Are VLMs from Effective High-Resolution Image Understanding?

ICCV 2025poster

High-resolution image (HRI) understanding aims to process images with a large number of pixels, such as pathological images and agricultural aerial images, both of which can exceed 1 million pixels. Vision Large Language Models (VLMs) can allegedly handle HRIs, however, there is a lack of a comprehe…

Cited by 0SourcePDFScholar
2025

MIND: Towards Immersive Psychological Healing with Multi-Agent Inner Dialogue

EMNLP 2025

Mental health issues are worsening in today’s competitive society, such as depression and anxiety. Traditional healings like counseling and chatbots fail to engage effectively, they often provide generic responses lacking emotional depth. Although large language models (LLMs) have the potential to c

Cited by 0SourcePDFScholar
2025

Mamba Only Glances Once (MOGO): A Lightweight Framework for Efficient Video Action Detection

NeurIPS 2025poster

Mamba, a lightweight sequence modeling framework offering near-linear complexity, presents a promising alternative to Transformers. In this work, we introduce MOGO (Mamba Only Glances Once), an end-to-end framework for efficient video action detection built entirely on the Mamba architecture. In MOG…

Cited by 0SourcecodeScholar
2025

Point Cloud Semantic Segmentation with Sparse and Inhomogeneous Annotations

AAAI 2025technical

Utilizing uniformly distributed sparse annotations, weakly supervised learning alleviates the heavy reliance on fine-grained annotations in point cloud semantic segmentation tasks. However, few works discuss the inhomogeneity of sparse annotations, albeit it is common in real-world scenarios. Theref…

2025

RAGEval: Scenario Specific RAG Evaluation Dataset Generation Framework

ACL 2025long

Retrieval-Augmented Generation (RAG) is a powerful approach that enables large language models (LLMs) to incorporate external knowledge. However, evaluating the effectiveness of RAG systems in specialized scenarios remains challenging due to the high costs of data construction and the lack of suitab…

2025

RATE-Nav: Region-Aware Termination Enhancement for Zero-shot Object Navigation with Vision-Language Models

ACL 2025finding

Object Navigation (ObjectNav) is a fundamental task in embodied artificial intelligence. Although significant progress has been made in semantic map construction and target direction prediction in current research, redundant exploration and exploration failures remain inevitable. A critical but unde…

Cited by 0SourcePDFScholar
2025

SiReRAG: Indexing Similar and Related Information for Multihop Reasoning

ICLR 2025poster

Indexing is an important step towards strong performance in retrieval-augmented generation (RAG) systems. However, existing methods organize data based on either semantic similarity (similarity) or related information (relatedness), but do not cover both perspectives comprehensively. Our analysis re…

2025

TaxoAdapt: Aligning LLM-Based Multidimensional Taxonomy Construction to Evolving Research Corpora

ACL 2025long

The rapid evolution of scientific fields introduces challenges in organizing and retrieving scientific literature. While expert-curated taxonomies have traditionally addressed this need, the process is time-consuming and expensive. Furthermore, recent automatic taxonomy construction methods either (…

2025

Understanding the Thinking Process of Reasoning Models: A Perspective from Schoenfeld’s Episode Theory

EMNLP 2025

While Large Reasoning Models (LRMs) generate extensive chain-of-thought reasoning, we lack a principled framework for understanding how these thoughts are structured. In this paper, we introduce a novel approach by applying Schoenfeld’s Episode Theory, a classic cognitive framework for human mathema

2024

Bias-aware Boolean Matrix Factorization Using Disentangled Representation Learning

UAI 2024poster

Boolean matrix factorization (BMF) has been widely utilized in fields such as recommendation systems, graph learning, text mining, and -omics data analysis. Traditional BMF methods decompose a binary matrix into the Boolean product of two lower-rank Boolean matrices plus homoscedastic random errors.…

2024

Cross-Image Distillation for Semi-Supervised Semantic Segmentation

ICASSP 2024accepted

Semi-supervised semantic segmentation approaches have drawn much more attention in recent years, which aim to exploit a large amount of unlabeled data together with a small number of labeled data. However, existing models usually regarded segmentation as pixel-wise classification, neglecting global…

Cited by 0SourceScholar
2024

Fair Abstractive Summarization of Diverse Perspectives

NAACL 2024long

People from different social and demographic groups express diverse perspectives and conflicting opinions on a broad set of topics such as product reviews, healthcare, law, and politics. A fair summary should provide a comprehensive coverage of diverse perspectives without underrepresenting certain…

2024

LLMs Assist NLP Researchers: Critique Paper (Meta-)Reviewing

EMNLP 2024main

Claim: This work is not advocating the use of LLMs for paper (meta-)reviewing. Instead, wepresent a comparative analysis to identify and distinguish LLM activities from human activities. Two research goals: i) Enable better recognition of instances when someone implicitly uses LLMs for reviewing act…

2024

Less Is More: Label Recommendation for Weakly Supervised Point Cloud Semantic Segmentation

AAAI 2024technical

Weak supervision has proven to be an effective strategy for reducing the burden of annotating semantic segmentation tasks in 3D space. However, unconstrained or heuristic weakly supervised annotation forms may lead to suboptimal label efficiency. To address this issue, we propose a novel label recom…

Cited by 20SourcePDFScholar
2024

PEaCE: A Chemistry-Oriented Dataset for Optical Character Recognition on Scientific Documents

COLING 2024main

Optical Character Recognition (OCR) is an established task with the objective of identifying the text present in an image. While many off-the-shelf OCR models exist, they are often trained for either scientific (e.g., formulae) or generic printed English text. Extracting text from chemistry publicat…

2024

Pruning as a Domain-specific LLM Extractor

NAACL 2024findings

Large Language Models (LLMs) have exhibited remarkable proficiency across a wide array of NLP tasks. However, the escalation in model size also engenders substantial deployment costs. While few efforts have explored model pruning techniques to reduce the size of LLMs, they mainly center on general o…

2023

FaMeSumm: Investigating and Improving Faithfulness of Medical Summarization

EMNLP 2023long main

Summaries of medical text shall be faithful by being consistent and factual with source inputs, which is an important but understudied topic for safety and efficiency in healthcare. In this paper, we investigate and improve faithfulness in summarization on a broad range of medical summarization task…

Cited by 0SourcecodeScholar
2023

Improving Graph Representation for Point Cloud Segmentation via Attentive Filtering

CVPR 2023poster

Recently, self-attention networks achieve impressive performance in point cloud segmentation due to their superiority in modeling long-range dependencies. However, compared to self-attention mechanism, we find graph convolutions show a stronger ability in capturing local geometry information with le…

Cited by 43SourcePDFScholar
2023

Null-Space Diffusion Sampling for Zero-Shot Point Cloud Completion

IJCAI 2023poster

Point cloud completion aims at estimating the complete data of objects from degraded observations. Despite existing completion methods achieving impressive performances, they rely heavily on degraded-complete data pairs for supervision. In this work, we propose a novel framework named Null-Space Dif…

Cited by 11SourcePDFScholar
2018

Learning Place-and-Time-Dependent Binary Descriptors for Long-Term Visual Localization

ICRA 2018poster

Vision-based navigation is extremely susceptible to natural scene changes. This can result in localization failures in less than a few hours after map creation. To combat short-term illumination changes as well as long-term seasonal variations, we propose using a place-and-time-dependent binary desc…

Cited by 19SourceScholar
2018

Software Defined Resource Allocation for Service-Oriented Networks

ICASSP 2018accepted

To support multiple on-demand services over several fixed communication networks, the network operators must allow flexible customization and fast provision of their network resources. One effective approach is network virtualization, whereby each service is mapped to a virtual subnetwork providing…

Cited by 0SourceScholar
2017

Traffic engineering for backhaul networks with wireless link scheduling

ICASSP 2017accepted

Traffic engineering (TE) problem is a central component of the next generation cloud-based wireless networks. In this paper, we study a new resource allocation scheme for effective traffic engineering under practical constraints such as the finite buffer size at each node. To reduce the computationa…

Cited by 0SourceScholar
2015

Fine-Grained Change Detection of Misaligned Scenes With Varied Illuminations

ICCV 2015poster

Detecting fine-grained subtle changes among a scene is critically important in practice. Previous change detection methods, focusing on detecting large-scale significant changes, cannot do this well. This paper proposes a feasible end-to-end approach to this challenging problem. We start from active…

Cited by 43PDFScholar