Search Results for author: Trong Nghia Hoang

Found 24 papers, 11 papers with code

Promoting Robustness of Randomized Smoothing: Two Cost-Effective Approaches

no code implementations11 Oct 2023 Linbo Liu, Trong Nghia Hoang, Lam M. Nguyen, Tsui-Wei Weng

The second approach introduces a post-processing method EsbRS which greatly improves the robustness certificate based on building model ensembles.

Adversarial Robustness

Personalized Federated Domain Adaptation for Item-to-Item Recommendation

no code implementations5 Jun 2023 Ziwei Fan, Hao Ding, Anoop Deoras, Trong Nghia Hoang

To mitigate this data bottleneck, we postulate that recommendation patterns learned from existing mature market segments (with private data) could be adapted to build effective warm-start models for emerging ones.

Domain Adaptation Personalized Federated Learning +1

Federated Learning of Models Pre-Trained on Different Features with Consensus Graphs

1 code implementation2 Jun 2023 Tengfei Ma, Trong Nghia Hoang, Jie Chen

Second, we need to learn a consensus graph that captures the high-order interactions between local feature spaces and how to combine them to achieve a better prediction.

Federated Learning Time Series

Robust Multivariate Time-Series Forecasting: Adversarial Attacks and Defense Mechanisms

1 code implementation19 Jul 2022 Linbo Liu, Youngsuk Park, Trong Nghia Hoang, Hilaf Hasson, Jun Huan

This work studies the threats of adversarial attack on multivariate probabilistic forecasting models and viable defense mechanisms.

Adversarial Attack Multivariate Time Series Forecasting +2

Learning Personalized Item-to-Item Recommendation Metric via Implicit Feedback

no code implementations18 Mar 2022 Trong Nghia Hoang, Anoop Deoras, Tong Zhao, Jin Li, George Karypis

We develop and investigate a personalizable deep metric model that captures both the internal contents of items and how they were interacted with by users.

Metric Learning Recommendation Systems

Federated Inference through Aligning Local Representations and Learning a Consensus Graph

no code implementations29 Sep 2021 Tengfei Ma, Trong Nghia Hoang, Jie Chen

On the top is a federation of the local data representations, performing global inference that incorporates all distributed parts collectively.

Federated Learning

Federated Estimation of Causal Effects from Observational Data

1 code implementation31 May 2021 Thanh Vinh Vo, Trong Nghia Hoang, Young Lee, Tze-Yun Leong

Many modern applications collect data that comes in federated spirit, with data kept locally and undisclosed.

Causal Inference Gaussian Processes

Adaptive Multi-Source Causal Inference

no code implementations31 May 2021 Thanh Vinh Vo, Pengfei Wei, Trong Nghia Hoang, Tze-Yun Leong

The proposed method can infer causal effects in the target population without prior knowledge of data discrepancy between the additional data sources and the target.

Causal Inference Transfer Learning

Revisiting the Sample Complexity of Sparse Spectrum Approximation of Gaussian Processes

1 code implementation NeurIPS 2020 Quang Minh Hoang, Trong Nghia Hoang, Hai Pham, David P. Woodruff

We introduce a new scalable approximation for Gaussian processes with provable guarantees which hold simultaneously over its entire parameter space.

Gaussian Processes

CHEER: Rich Model Helps Poor Model via Knowledge Infusion

no code implementations21 May 2020 Cao Xiao, Trong Nghia Hoang, Shenda Hong, Tengfei Ma, Jimeng Sun

There is a growing interest in applying deep learning (DL) to healthcare, driven by the availability of data with multiple feature channels in rich-data environments (e. g., intensive care units).

Bayesian Nonparametric Federated Learning of Neural Networks

1 code implementation28 May 2019 Mikhail Yurochkin, Mayank Agarwal, Soumya Ghosh, Kristjan Greenewald, Trong Nghia Hoang, Yasaman Khazaeni

In federated learning problems, data is scattered across different servers and exchanging or pooling it is often impractical or prohibited.

Federated Learning General Classification +1

RDPD: Rich Data Helps Poor Data via Imitation

1 code implementation6 Sep 2018 Shenda Hong, Cao Xiao, Trong Nghia Hoang, Tengfei Ma, Hongyan Li, Jimeng Sun

In many situations, we need to build and deploy separate models in related environments with different data qualities.

Knowledge Distillation

Collective Online Learning of Gaussian Processes in Massive Multi-Agent Systems

no code implementations23 May 2018 Trong Nghia Hoang, Quang Minh Hoang, Kian Hsiang Low, Jonathan How

Distributed machine learning (ML) is a modern computation paradigm that divides its workload into independent tasks that can be simultaneously achieved by multiple machines (i. e., agents) for better scalability.

Gaussian Processes

Decentralized High-Dimensional Bayesian Optimization with Factor Graphs

no code implementations19 Nov 2017 Trong Nghia Hoang, Quang Minh Hoang, Ruofei Ouyang, Kian Hsiang Low

This paper presents a novel decentralized high-dimensional Bayesian optimization (DEC-HBO) algorithm that, in contrast to existing HBO algorithms, can exploit the interdependent effects of various input components on the output of the unknown objective function f for boosting the BO performance and still preserve scalability in the number of input dimensions without requiring prior knowledge or the existence of a low (effective) dimension of the input space.

Bayesian Optimization Vocal Bursts Intensity Prediction

Stochastic Variational Inference for Bayesian Sparse Gaussian Process Regression

no code implementations1 Nov 2017 Haibin Yu, Trong Nghia Hoang, Kian Hsiang Low, Patrick Jaillet

This paper presents a novel variational inference framework for deriving a family of Bayesian sparse Gaussian process regression (SGPR) models whose approximations are variationally optimal with respect to the full-rank GPR model enriched with various corresponding correlation structures of the observation noises.

GPR regression +2

Near-Optimal Adversarial Policy Switching for Decentralized Asynchronous Multi-Agent Systems

no code implementations17 Oct 2017 Trong Nghia Hoang, Yuchen Xiao, Kavinayan Sivakumar, Christopher Amato, Jonathan How

The practicality of existing works addressing this challenge is limited to only small-scale synchronous decision-making scenarios or a single agent planning its best response against a single adversary with fixed, procedurally characterized strategies.

Decision Making

A Generalized Stochastic Variational Bayesian Hyperparameter Learning Framework for Sparse Spectrum Gaussian Process Regression

no code implementations18 Nov 2016 Quang Minh Hoang, Trong Nghia Hoang, Kian Hsiang Low

While much research effort has been dedicated to scaling up sparse Gaussian process (GP) models based on inducing variables for big data, little attention is afforded to the other less explored class of low-rank GP approximations that exploit the sparse spectral representation of a GP kernel.

regression Stochastic Optimization

Near-Optimal Active Learning of Multi-Output Gaussian Processes

1 code implementation21 Nov 2015 Yehong Zhang, Trong Nghia Hoang, Kian Hsiang Low, Mohan Kankanhalli

This paper addresses the problem of active learning of a multi-output Gaussian process (MOGP) model representing multiple types of coexisting correlated environmental phenomena.

Active Learning Gaussian Processes

Interactive POMDP Lite: Towards Practical Planning to Predict and Exploit Intentions for Interacting with Self-Interested Agents

1 code implementation18 Apr 2013 Trong Nghia Hoang, Kian Hsiang Low

A key challenge in non-cooperative multi-agent systems is that of developing efficient planning algorithms for intelligent agents to interact and perform effectively among boundedly rational, self-interested agents (e. g., humans).

A General Framework for Interacting Bayes-Optimally with Self-Interested Agents using Arbitrary Parametric Model and Model Prior

no code implementations7 Apr 2013 Trong Nghia Hoang, Kian Hsiang Low

Recent advances in Bayesian reinforcement learning (BRL) have shown that Bayes-optimality is theoretically achievable by modeling the environment's latent dynamics using Flat-Dirichlet-Multinomial (FDM) prior.

Multi-agent Reinforcement Learning reinforcement-learning +1

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