Search Results for author: Ziyu Liu

Found 21 papers, 14 papers with code

MIA-DPO: Multi-Image Augmented Direct Preference Optimization For Large Vision-Language Models

1 code implementation23 Oct 2024 Ziyu Liu, Yuhang Zang, Xiaoyi Dong, Pan Zhang, Yuhang Cao, Haodong Duan, Conghui He, Yuanjun Xiong, Dahua Lin, Jiaqi Wang

Existing visual alignment methods, primarily designed for single-image scenarios, struggle to effectively handle the complexity of multi-image tasks due to the scarcity of diverse training data and the high cost of annotating chosen/rejected pairs.

ESP-MedSAM: Efficient Self-Prompting SAM for Universal Domain-Generalized Medical Image Segmentation

1 code implementation19 Jul 2024 Qing Xu, Jiaxuan Li, Xiangjian He, Ziyu Liu, Zhen Chen, Wenting Duan, Chenxin Li, Maggie M. He, Fiseha B. Tesema, Wooi P. Cheah, Yi Wang, Rong Qu, Jonathan M. Garibaldi

Finally, we design the Query-Decoupled Modality Decoder (QDMD) that leverages a one-to-one strategy to provide an independent decoding channel for every modality.

Decoder Image Segmentation +5

Guidelines for Augmentation Selection in Contrastive Learning for Time Series Classification

1 code implementation12 Jul 2024 Ziyu Liu, Azadeh Alavi, Minyi Li, Xiang Zhang

Self-supervised contrastive learning has become a key technique in deep learning, particularly in time series analysis, due to its ability to learn meaningful representations without explicit supervision.

Activity Recognition Contrastive Learning +3

MMDU: A Multi-Turn Multi-Image Dialog Understanding Benchmark and Instruction-Tuning Dataset for LVLMs

1 code implementation17 Jun 2024 Ziyu Liu, Tao Chu, Yuhang Zang, Xilin Wei, Xiaoyi Dong, Pan Zhang, Zijian Liang, Yuanjun Xiong, Yu Qiao, Dahua Lin, Jiaqi Wang

Generating natural and meaningful responses to communicate with multi-modal human inputs is a fundamental capability of Large Vision-Language Models(LVLMs).

Visual Question Answering

TinyLLaVA Factory: A Modularized Codebase for Small-scale Large Multimodal Models

2 code implementations20 May 2024 Junlong Jia, Ying Hu, Xi Weng, Yiming Shi, Miao Li, Xingjian Zhang, Baichuan Zhou, Ziyu Liu, Jie Luo, Lei Huang, Ji Wu

We present TinyLLaVA Factory, an open-source modular codebase for small-scale large multimodal models (LMMs) with a focus on simplicity of code implementations, extensibility of new features, and reproducibility of training results.

Philosophy

TBNet: A Neural Architectural Defense Framework Facilitating DNN Model Protection in Trusted Execution Environments

no code implementations7 May 2024 Ziyu Liu, Tong Zhou, Yukui Luo, Xiaolin Xu

Trusted Execution Environments (TEEs) have become a promising solution to secure DNN models on edge devices.

RAR: Retrieving And Ranking Augmented MLLMs for Visual Recognition

2 code implementations20 Mar 2024 Ziyu Liu, Zeyi Sun, Yuhang Zang, Wei Li, Pan Zhang, Xiaoyi Dong, Yuanjun Xiong, Dahua Lin, Jiaqi Wang

Notably, our approach demonstrates a significant improvement in performance on 5 fine-grained visual recognition benchmarks, 11 few-shot image recognition datasets, and the 2 object detection datasets under the zero-shot recognition setting.

Contrastive Learning Fine-Grained Visual Recognition +3

Self-Supervised Learning for Time Series: Contrastive or Generative?

1 code implementation14 Mar 2024 Ziyu Liu, Azadeh Alavi, Minyi Li, Xiang Zhang

In this paper, we will present a comprehensive comparative study between contrastive and generative methods in time series.

Model Optimization Representation Learning +2

Introducing Shape Prior Module in Diffusion Model for Medical Image Segmentation

no code implementations12 Sep 2023 Zhiqing Zhang, Guojia Fan, Tianyong Liu, Nan Li, Yuyang Liu, Ziyu Liu, Canwei Dong, Shoujun Zhou

Furthermore, to capture specific anatomical a priori information in medical images, we incorporate a shape a priori module.

Anatomy Anomaly Detection +8

On Privacy and Personalization in Cross-Silo Federated Learning

1 code implementation16 Jun 2022 Ziyu Liu, Shengyuan Hu, Zhiwei Steven Wu, Virginia Smith

While the application of differential privacy (DP) has been well-studied in cross-device federated learning (FL), there is a lack of work considering DP and its implications for cross-silo FL, a setting characterized by a limited number of clients each containing many data subjects.

Federated Learning Multi-Task Learning

The Skellam Mechanism for Differentially Private Federated Learning

1 code implementation NeurIPS 2021 Naman Agarwal, Peter Kairouz, Ziyu Liu

We introduce the multi-dimensional Skellam mechanism, a discrete differential privacy mechanism based on the difference of two independent Poisson random variables.

Federated Learning

ECG-Based Heart Arrhythmia Diagnosis Through Attentional Convolutional Neural Networks

1 code implementation18 Aug 2021 Ziyu Liu, Xiang Zhang

Electrocardiography (ECG) signal is a highly applied measurement for individual heart condition, and much effort have been endeavored towards automatic heart arrhythmia diagnosis based on machine learning.

Arrhythmia Detection BIG-bench Machine Learning

The Distributed Discrete Gaussian Mechanism for Federated Learning with Secure Aggregation

1 code implementation12 Feb 2021 Peter Kairouz, Ziyu Liu, Thomas Steinke

To ensure privacy, we add on-device noise and use secure aggregation so that only the noisy sum is revealed to the server.

Federated Learning Quantization

LightMC: A Dynamic and Efficient Multiclass Decomposition Algorithm

no code implementations25 Aug 2019 Ziyu Liu, Guolin Ke, Jiang Bian, Tie-Yan Liu

Instead of using fixed coding matrix and decoding strategy, LightMC uses a differentiable decoding strategy, which enables it to dynamically optimize the coding matrix and decoding strategy, toward increasing the overall accuracy of multiclass classification, via back propagation jointly with the training of base learners in an iterative way.

Classification General Classification

Towards Understanding Chinese Checkers with Heuristics, Monte Carlo Tree Search, and Deep Reinforcement Learning

no code implementations5 Mar 2019 Ziyu Liu, Meng Zhou, Weiqing Cao, Qiang Qu, Henry Wing Fung Yeung, Vera Yuk Ying Chung

The game of Chinese Checkers is a challenging traditional board game of perfect information that differs from other traditional games in two main aspects: first, unlike Chess, all checkers remain indefinitely in the game and hence the branching factor of the search tree does not decrease as the game progresses; second, unlike Go, there are also no upper bounds on the depth of the search tree since repetitions and backward movements are allowed.

Deep Reinforcement Learning Reinforcement Learning (RL)

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