Search Results for author: Hak-Keung Lam

Found 6 papers, 1 papers with code

Constrained Proximal Policy Optimization

no code implementations23 May 2023 Chengbin Xuan, Feng Zhang, Faliang Yin, Hak-Keung Lam

The problem of constrained reinforcement learning (CRL) holds significant importance as it provides a framework for addressing critical safety satisfaction concerns in the field of reinforcement learning (RL).

reinforcement-learning Reinforcement Learning (RL)

Distributed Learning in Heterogeneous Environment: federated learning with adaptive aggregation and computation reduction

no code implementations16 Feb 2023 Jingxin Li, Toktam Mahmoodi, Hak-Keung Lam

Although federated learning has achieved many breakthroughs recently, the heterogeneous nature of the learning environment greatly limits its performance and hinders its real-world applications.

Federated Learning Transfer Learning

Improving COVID-19 CT Classification of CNNs by Learning Parameter-Efficient Representation

no code implementations9 Aug 2022 Yujia Xu, Hak-Keung Lam, Guangyu Jia, Jian Jiang, Junkai Liao, Xinqi Bao

And the achieved precision, sensitivity, and specificity for the COVID-19 pneumonia category are 98. 40%, 99. 59%, and 99. 50%, respectively.

Contrastive Learning COVID-19 Diagnosis +1

UncertaintyFuseNet: Robust Uncertainty-aware Hierarchical Feature Fusion Model with Ensemble Monte Carlo Dropout for COVID-19 Detection

1 code implementation18 May 2021 Moloud Abdar, Soorena Salari, Sina Qahremani, Hak-Keung Lam, Fakhri Karray, Sadiq Hussain, Abbas Khosravi, U. Rajendra Acharya, Vladimir Makarenkov, Saeid Nahavandi

Differently from most of existing studies, which used either CT scan or X-ray images in COVID-19-case classification, we present a simple but efficient deep learning feature fusion model, called UncertaintyFuseNet, which is able to classify accurately large datasets of both of these types of images.

Computed Tomography (CT)

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