User profiles for Ka-Ho Chow

Ka-Ho Chow

The University of Hong Kong
Verified email at cs.hku.hk
Cited by 1916

LDP-Fed: Federated learning with local differential privacy

S Truex, L Liu, KH Chow, ME Gursoy… - Proceedings of the third …, 2020 - dl.acm.org
This paper presents LDP-Fed, a novel federated learning system with a formal privacy guarantee
using local differential privacy (LDP). Existing LDP protocols are developed primarily to …

Demystifying learning rate policies for high accuracy training of deep neural networks

Y Wu, L Liu, J Bae, KH Chow, A Iyengar… - … conference on big …, 2019 - ieeexplore.ieee.org
Learning Rate (LR) is an important hyper-parameter to tune for effective training of deep
neural networks (DNNs). Even for the baseline of a constant learning rate, it is non-trivial to …

A framework for evaluating gradient leakage attacks in federated learning

W Wei, L Liu, M Loper, KH Chow, ME Gursoy… - arXiv preprint arXiv …, 2020 - arxiv.org
Federated learning (FL) is an emerging distributed machine learning framework for collaborative
model training with a network of clients (edge devices). FL offers default client privacy …

A framework for evaluating client privacy leakages in federated learning

W Wei, L Liu, M Loper, KH Chow, ME Gursoy… - … on Research in …, 2020 - Springer
Federated learning (FL) is an emerging distributed machine learning framework for collaborative
model training with a network of clients (edge devices). FL offers default client privacy …

Adversarial objectness gradient attacks in real-time object detection systems

KH Chow, L Liu, M Loper, J Bae… - 2020 Second IEEE …, 2020 - ieeexplore.ieee.org
Real-time object detection is one of the key applications of deep neural networks (DNNs) for
real-world mission-critical systems. While DNN-powered object detection systems celebrate …

Lockdown: backdoor defense for federated learning with isolated subspace training

T Huang, S Hu, KH Chow, F Ilhan… - Advances in Neural …, 2023 - proceedings.neurips.cc
Federated learning (FL) is vulnerable to backdoor attacks due to its distributed computing
nature. Existing defense solution usually requires larger amount of computation in either the …

Structures of a non-ribosomal peptide synthetase condensation domain suggest the basis of substrate selectivity

…, JA Kaczmarski, A Gavriilidou, KH Chow… - Nature …, 2021 - nature.com
Non-ribosomal peptide synthetases are important enzymes for the assembly of complex
peptide natural products. Within these multi-modular assembly lines, condensation domains …

Impact of information technology on the performance of logistics industry: the case of Hong Kong and Pearl Delta region

…, A Gunasekaran, HY Lam, KH Chow… - Journal of the …, 2014 - Taylor & Francis
Over the last decade, a number of research studies have advocated the use of information
technology (IT) in different aspects of logistics and distribution operations. This study …

Deep neural network ensembles against deception: Ensemble diversity, accuracy and robustness

L Liu, W Wei, KH Chow, M Loper… - 2019 IEEE 16th …, 2019 - ieeexplore.ieee.org
Ensemble learning is a methodology that integrates multiple DNN learners for improving
prediction performance of individual learners. Diversity is greater when the errors of the …

Ocr hinders rag: Evaluating the cascading impact of ocr on retrieval-augmented generation

…, B Wang, L Ouyang, Z Wen, Y Li, KH Chow… - arXiv preprint arXiv …, 2024 - arxiv.org
Retrieval-augmented Generation (RAG) enhances Large Language Models (LLMs) by
integrating external knowledge to reduce hallucinations and incorporate up-to-date information …