Search Results for author: Yajing Liu

Found 13 papers, 1 papers with code

ReLU Neural Networks, Polyhedral Decompositions, and Persistent Homolog

no code implementations30 Jun 2023 Yajing Liu, Christina M Cole, Chris Peterson, Michael Kirby

A ReLU neural network leads to a finite polyhedral decomposition of input space and a corresponding finite dual graph.

Quantization

Hamming Similarity and Graph Laplacians for Class Partitioning and Adversarial Image Detection

no code implementations2 May 2023 Huma Jamil, Yajing Liu, Turgay Caglar, Christina M. Cole, Nathaniel Blanchard, Christopher Peterson, Michael Kirby

Here, we investigate the potential for ReLU activation patterns (encoded as bit vectors) to aid in understanding and interpreting the behavior of neural networks.

Hierarchical Prompt Learning for Multi-Task Learning

no code implementations CVPR 2023 Yajing Liu, Yuning Lu, Hao liu, Yaozu An, Zhuoran Xu, Zhuokun Yao, Baofeng Zhang, Zhiwei Xiong, Chenguang Gui

Considering this, we present Hierarchical Prompt (HiPro) learning, a simple and effective method for jointly adapting a pre-trained VLM to multiple downstream tasks.

Multi-Task Learning

Dual Graphs of Polyhedral Decompositions for the Detection of Adversarial Attacks

no code implementations23 Nov 2022 Huma Jamil, Yajing Liu, Christina M. Cole, Nathaniel Blanchard, Emily J. King, Michael Kirby, Christopher Peterson

This paper illustrates how one can utilize the dual graph to detect and analyze adversarial attacks in the context of digital images.

Self-Supervision Can Be a Good Few-Shot Learner

4 code implementations19 Jul 2022 Yuning Lu, Liangjian Wen, Jianzhuang Liu, Yajing Liu, Xinmei Tian

Specifically, we maximize the mutual information (MI) of instances and their representations with a low-bias MI estimator to perform self-supervised pre-training.

cross-domain few-shot learning Unsupervised Few-Shot Image Classification +1

Source-Free Domain Adaptation for Real-world Image Dehazing

no code implementations14 Jul 2022 Hu Yu, Jie Huang, Yajing Liu, Qi Zhu, Man Zhou, Feng Zhao

Although certain Domain Adaptation (DA) dehazing methods have been presented, they inevitably require access to the source dataset to reduce the gap between the source synthetic and target real domains.

Image Dehazing Source-Free Domain Adaptation +1

Prompt Distribution Learning

no code implementations CVPR 2022 Yuning Lu, Jianzhuang Liu, Yonggang Zhang, Yajing Liu, Xinmei Tian

We present prompt distribution learning for effectively adapting a pre-trained vision-language model to address downstream recognition tasks.

Language Modelling

Improving Fraud Detection via Hierarchical Attention-based Graph Neural Network

no code implementations12 Feb 2022 Yajing Liu, Zhengya Sun, Wensheng Zhang

In this paper, we propose a Hierarchical Attention-based Graph Neural Network (HA-GNN) for fraud detection, which incorporates weighted adjacency matrices across different relations against camouflage.

Fraud Detection Relation

Exposure Normalization and Compensation for Multiple-Exposure Correction

no code implementations CVPR 2022 Jie Huang, Yajing Liu, Xueyang Fu, Man Zhou, Yang Wang, Feng Zhao, Zhiwei Xiong

However, the procedures of correcting underexposure and overexposure to normal exposures are much different from each other, leading to large discrepancies for the network in correcting multiple exposures, thus resulting in poor performance.

Image Enhancement

Phoneme-based Distribution Regularization for Speech Enhancement

no code implementations8 Apr 2021 Yajing Liu, Xiulian Peng, Zhiwei Xiong, Yan Lu

Specifically, we propose a phoneme-based distribution regularization (PbDr) for speech enhancement, which incorporates frame-wise phoneme information into speech enhancement network in a conditional manner.

Speech Enhancement

Model-Free State Estimation Using Low-Rank Canonical Polyadic Decomposition

no code implementations13 Apr 2020 Ahmed S. Zamzam, Yajing Liu, Andrey Bernstein

As electric grids experience high penetration levels of renewable generation, fundamental changes are required to address real-time situational awareness.

Imputation

Compact Feature Learning for Multi-Domain Image Classification

no code implementations CVPR 2019 Yajing Liu, Xinmei Tian, Ya Li, Zhiwei Xiong, Feng Wu

However, they view the distributions of features from different classes as a general distribution and try to match these distributions across domains, which lead to the mixture of features from different classes across domains and degrade the performance of classification.

Classification domain classification +2

Deep Domain Generalization via Conditional Invariant Adversarial Networks

no code implementations ECCV 2018 Ya Li, Xinmei Tian, Mingming Gong, Yajing Liu, Tongliang Liu, Kun Zhang, DaCheng Tao

Under the assumption that the conditional distribution $P(Y|X)$ remains unchanged across domains, earlier approaches to domain generalization learned the invariant representation $T(X)$ by minimizing the discrepancy of the marginal distribution $P(T(X))$.

Domain Generalization Representation Learning

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