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S Kevin Zhou

37 accepted papers

2026

AD-BTS: Adaptive Dual-Branch Token Sparsification via Spatial Information Density

ICML 2026poster

High-resolution visual encoders in multimodal large language models (MLLMs) substantially improve fine-grained perception, yet incur prohibitive computational costs.Existing token pruning methods are effective on natural images but struggle with spatially sparse structured inputs (e.g., charts), whe…

Cited by 0SourceScholar
2026

LazyVAR: Accelerating Visual Autoregressive Models via Scale-wise Token Pruning and Parallel Group Decoding

CVPR 2026

Visual Autoregressive (VAR) modeling introduces a new paradigm for image generation by extending autoregressive mechanisms from next-token prediction to next-scale prediction, achieving remarkable performance. However, as the number of tokens increases rapidly with scale, processing full token maps

Cited by 0SourceScholar
2026

MedAtlas: Evaluating LLMs for Multi-Round, Multi-Task Medical Reasoning Across Diverse Imaging Modalities and Clinical Text

AAAI 2026technical

Artificial intelligence has demonstrated significant potential in clinical decision-making; however, developing models capable of adapting to diverse real-world scenarios and performing complex diagnostic reasoning remains a major challenge. Existing medical multi-modal benchmarks are typically limi

Cited by 0SourcePDFScholar
2026

MedGMAE: Gaussian Masked Autoencoders for Medical Volumetric Representation Learning

ICLR 2026poster

Self-supervised pre-training has emerged as a critical paradigm for learning transferable representations from unlabeled medical volumetric data. Masked autoencoder based methods have garnered significant attention, yet their application to volumetric medical image faces fundamental limitations from…

Cited by 0SourcecodeScholar
2026

NC-Bench and NCfold: A Benchmark and Closed-Loop Framework for RNA Non-Canonical Base-Pair Prediction

ICLR 2026poster

RNA secondary structure forms the basis for folding and function, with non-canonical (NC) interactions indispensable for catalysis, regulation, and molecular recognition. Despite their importance, predicting NC base pairs remains challenging due to the absence of a standardized benchmark for systema…

Cited by 0SourcecodeScholar
2026

Optimizing KV Cache Eviction from an Output Perturbation Perspective

ICML 2026poster

Large language models have revolutionized natural language processing but face significant challenges of high storage and runtime costs, due to the transformer architecture's reliance on self-attention, particularly the large KV cache for long-sequence inference. Recent efforts to reduce KV cache si…

Cited by 0SourceScholar
2026

Stem: Rethinking Causal Information Flow in Sparse Attention

ICML 2026poster

The quadratic computational complexity of self-attention remains a fundamental bottleneck for scaling Large Language Models (LLMs) to long contexts, particularly during the pre-filling phase. In this paper, we rethink the causal attention mechanism from the perspective of information flow. Due to ca…

Cited by 0SourceScholar
2026

Taming the Fragility of KV Cache Eviction in LLM Inference

ICLR 2026poster

Large language models have revolutionized natural language processing, yet their deployment remains hampered by the substantial memory and runtime overhead of the transformer’s Key-Value cache. To mitigate this, recent methods employ a scoring-aggregation framework to evict unimportant cache entries…

Cited by 0SourcecodeScholar
2025

A General Knowledge Injection Framework for ICD Coding

ACL 2025finding

ICD Coding aims to assign a wide range of medical codes to a medical text document, which is a popular and challenging task in the healthcare domain. To alleviate the problems of long-tail distribution and the lack of annotations of code-specific evidence, many previous works have proposed incorpora…

2025

Ada-KV: Optimizing KV Cache Eviction by Adaptive Budget Allocation for Efficient LLM Inference

NeurIPS 2025poster

Large Language Models have excelled in various domains but face efficiency challenges due to the growing Key-Value (KV) cache required for long-sequence inference. Recent efforts aim to reduce KV cache size by evicting vast non-critical cache elements during runtime while preserving generation quali…

Cited by 0SourcecodeScholar
2025

FRAG: A Flexible Modular Framework for Retrieval-Augmented Generation based on Knowledge Graphs

ACL 2025finding

To mitigate the hallucination and knowledge deficiency in large language models (LLMs), Knowledge Graph (KG)-based Retrieval-Augmented Generation (RAG) has shown promising potential by utilizing KGs as an external resource to enhance LLM reasoning.However, existing KG-RAG approaches struggle with a…

2025

GraphInsight: Unlocking Insights in Large Language Models for Graph Structure Understanding

ACL 2025long

Although Large Language Models (LLMs) have demonstrated potential in processing graphs, they struggle with comprehending graphical structure information through prompts of graph description sequences, especially as the graph size increases. We attribute this challenge to the uneven memory performanc…

Cited by 0SourcePDFScholar
2025

Label-supervised surgical instrument segmentation using temporal equivariance and semantic continuity

IROS 2025

In robotic surgery, instrument presence labels are typically recorded alongside video streams, offering a cost-effective alternative to manual annotations for segmentation tasks. Label-supervised surgical instrument segmentation (SIS), a weakly supervised segmentation setting where only instrument p

Cited by 1SourceScholar
2025

Lego Sketch: A Scalable Memory-augmented Neural Network for Sketching Data Streams

ICML 2025poster

Sketches, probabilistic structures for estimating item frequencies in infinite data streams with limited space, are widely used across various domains. Recent studies have shifted the focus from handcrafted sketches to neural sketches, leveraging memory-augmented neural networks (MANNs) to enhance t…

2025

MVP-CBM: Multi-layer Visual Preference-enhanced Concept Bottleneck Model for Explainable Medical Image Classification

IJCAI 2025

The concept bottleneck model (CBM), as a technique improving interpretability via linking predictions to human-understandable concepts, makes high-risk and life-critical medical image classification credible. Typically, existing CBM methods associate the final layer of visual encoders with concepts

2025

Prototype-based Optimal Transport for Out-of-Distribution Detection

IJCAI 2025

Detecting Out-of-Distribution (OOD) inputs is crucial for improving the reliability of deep neural networks in the real-world deployment. In this paper, inspired by the inherent distribution shift between in-distribution (ID) and OOD data, we propose a novel method that leverages optimal transport t

2025

Self-Supervised Diffusion MRI Denoising via Iterative and Stable Refinement

ICLR 2025poster

Magnetic Resonance Imaging (MRI), including diffusion MRI (dMRI), serves as a ``microscope'' for anatomical structures and routinely mitigates the influence of low signal-to-noise ratio scans by compromising temporal or spatial resolution. However, these compromises fail to meet clinical demands for…

2025

SkewRoute: Training-Free LLM Routing for Knowledge Graph Retrieval-Augmented Generation via Score Skewness of Retrieved Context

EMNLP 2025

Large language models excel at many tasks but often incur high inference costs during deployment. To mitigate hallucination, many systems use a knowledge graph to enhance retrieval-augmented generation (KG-RAG). However, the large amount of retrieved knowledge contexts increase these inference costs

2024

CARZero: Cross-Attention Alignment for Radiology Zero-Shot Classification

CVPR 2024poster

The advancement of Zero-Shot Learning in the medical domain has been driven forward by using pre-trained models on large-scale image-text pairs focusing on image-text alignment. However existing methods primarily rely on cosine similarity for alignment which may not fully capture the complex relatio…

2024

FairMedFM: Fairness Benchmarking for Medical Imaging Foundation Models

NeurIPS 2024poster

The advent of foundation models (FMs) in healthcare offers unprecedented opportunities to enhance medical diagnostics through automated classification and segmentation tasks. However, these models also raise significant concerns about their fairness, especially when applied to diverse and underrepre…

2024

Mayfly: a Neural Data Structure for Graph Stream Summarization

ICLR 2024spotlight

A graph is a structure made up of vertices and edges used to represent complex relationships between entities, while a graph stream is a continuous flow of graph updates that convey evolving relationships between entities. The massive volume and high dynamism of graph streams promote research on dat…

Cited by 4SourcePDFScholar
2024

Out-of-Distribution Detection for Learning-Based Chest X-Ray Diagnosis

ICASSP 2024accepted

Deep learning has shown prominence in chest radiography interpretation, which is critical in evaluating various lung and chest diseases, such as pneumonia, emphysema, and tuberculosis. Deploying machine learning model, it is important to detect out-of-distribution (OOD) inputs, which are distinct fr…

Cited by 0SourceScholar
2024

Partial Optimal Transport Based Out-of-Distribution Detection for Open-Set Semi-Supervised Learning

IJCAI 2024poster

Semi-supervised learning (SSL) is a machine learning paradigm that utilizes both labeled and unlabeled data to enhance the performance of learning tasks. However, SSL methods operate under the assumption that the label spaces of labeled and unlabeled data are identical, which may not hold in open-wo…

2024

Prompt Learning with Extended Kalman Filter for Pre-trained Language Models

IJCAI 2024poster

Prompt learning has gained popularity as a means to leverage the knowledge embedded in pre-trained language models (PLMs) for NLP tasks while using a limited number of trainable parameters. While it has shown promise in tasks like sentiment classification and natural language inference, generating s…

Cited by 1SourcePDFScholar
2024

WeakPCSOD: Overcoming the Bias of Box Annotations for Weakly Supervised Point Cloud Salient Object Detection

AAAI 2024technical

Point cloud salient object detection (PCSOD) is a newly proposed task in 3D dense segmentation. However, the acquisition of accurate 3D dense annotations comes at a high cost, severely limiting the progress of PCSOD. To address this issue, we propose the first weakly supervised PCSOD (named WeakPCSO…

Cited by 3SourcePDFScholar
2023

Rethinking Semi-Supervised Medical Image Segmentation: A Variance-Reduction Perspective

NeurIPS 2023poster

For medical image segmentation, contrastive learning is the dominant practice to improve the quality of visual representations by contrasting semantically similar and dissimilar pairs of samples. This is enabled by the observation that without accessing ground truth labels, negative examples with tr…

2023

Unsupervised Polychromatic Neural Representation for CT Metal Artifact Reduction

NeurIPS 2023poster

Emerging neural reconstruction techniques based on tomography (e.g., NeRF, NeAT, and NeRP) have started showing unique capabilities in medical imaging. In this work, we present a novel Polychromatic neural representation (Polyner) to tackle the challenging problem of CT imaging when metallic implant…

2022

DeltaNet: Conditional Medical Report Generation for COVID-19 Diagnosis

COLING 2022main

Fast screening and diagnosis are critical in COVID-19 patient treatment. In addition to the gold standard RT-PCR, radiological imaging like X-ray and CT also works as an important means in patient screening and follow-up. However, due to the excessive number of patients, writing reports becomes a he…

2022

Weakly Supervised Object Localization through Inter-class Feature Similarity and Intra-Class Appearance Consistency

ECCV 2022poster

"Weakly supervised object localization (WSOL) aims at detecting objects through only image-level labels. Class activation maps (CAMs) are the commonly used features for WSOL. However, existing CAM-based methods tend to excessively pursue discriminative features for object recognition and hence ignor…

Cited by 14SourcePDFScholar
2021

Shallow Feature Matters for Weakly Supervised Object Localization

CVPR 2021poster

Weakly supervised object localization (WSOL) aims to localize objects by only utilizing image-level labels. Class activation maps (CAMs) are the commonly used features to achieve WSOL. However, previous CAM-based methods did not take full advantage of the shallow features, despite their importance f…

Cited by 117PDFcodeScholar
2021

XraySyn: Realistic View Synthesis From a Single Radiograph Through CT Priors

AAAI 2021technical

A radiograph visualizes the internal anatomy of a patient through the use of X-ray, which projects 3D information onto a 2D plane. Hence, radiograph analysis naturally requires physicians to relate their prior knowledge about 3D human anatomy to 2D radiographs. Synthesizing novel radiographic views…

2020

SAINT: Spatially Aware Interpolation NeTwork for Medical Slice Synthesis

CVPR 2020poster

Deep learning-based single image super-resolution (SISR) methods face various challenges when applied to 3D medical volumetric data (i.e., CT and MR images) due to the high memory cost and anisotropic resolution, which adversely affect their performance. Furthermore, mainstream SISR methods are desi…

Cited by 63PDFScholar
2019

Multiview 2D/3D Rigid Registration via a Point-Of-Interest Network for Tracking and Triangulation

CVPR 2019poster

We propose to tackle the problem of multiview 2D/3D rigid registration for intervention via a Point-Of-Interest Network for Tracking and Triangulation (POINT^2). POINT^2 learns to establish 2D point-to-point correspondences between the pre- and intra-intervention images by tracking a set of random P…

Cited by 65PDFScholar