Search Results for author: Peng Liao

Found 12 papers, 3 papers with code

PV-SSD: A Multi-Modal Point Cloud Feature Fusion Method for Projection Features and Variable Receptive Field Voxel Features

no code implementations13 Aug 2023 Yongxin Shao, Aihong Tan, Zhetao Sun, Enhui Zheng, Tianhong Yan, Peng Liao

This paper proposes a multi-modal point cloud feature fusion method for projection features and variable receptive field voxel features (PV-SSD) based on projection and variable voxelization to solve the information loss problem.

3D Object Detection Autonomous Driving +1

Did we personalize? Assessing personalization by an online reinforcement learning algorithm using resampling

1 code implementation11 Apr 2023 Susobhan Ghosh, Raphael Kim, Prasidh Chhabria, Raaz Dwivedi, Predrag Klasnja, Peng Liao, Kelly Zhang, Susan Murphy

We use a working definition of personalization and introduce a resampling-based methodology for investigating whether the personalization exhibited by the RL algorithm is an artifact of the RL algorithm stochasticity.

Decision Making Reinforcement Learning (RL)

EMT-NAS:Transferring Architectural Knowledge Between Tasks From Different Datasets

1 code implementation CVPR 2023 Peng Liao, Yaochu Jin, Wenli Du

In deep learning, this is usually achieved by sharing a common neural network architecture and jointly training the weights.

Multi-Task Learning Neural Architecture Search

Robust Batch Policy Learning in Markov Decision Processes

no code implementations9 Nov 2020 Zhengling Qi, Peng Liao

We study the offline data-driven sequential decision making problem in the framework of Markov decision process (MDP).

Decision Making

IntelligentPooling: Practical Thompson Sampling for mHealth

no code implementations31 Jul 2020 Sabina Tomkins, Peng Liao, Predrag Klasnja, Susan Murphy

In this work we are concerned with the following challenges: 1) individuals who are in the same context can exhibit differential response to treatments 2) only a limited amount of data is available for learning on any one individual, and 3) non-stationary responses to treatment.

reinforcement-learning Reinforcement Learning (RL) +1

Batch Policy Learning in Average Reward Markov Decision Processes

no code implementations23 Jul 2020 Peng Liao, Zhengling Qi, Runzhe Wan, Predrag Klasnja, Susan Murphy

The performance of the method is illustrated by simulation studies and an analysis of a mobile health study promoting physical activity.

Rapidly Personalizing Mobile Health Treatment Policies with Limited Data

no code implementations23 Feb 2020 Sabina Tomkins, Peng Liao, Predrag Klasnja, Serena Yeung, Susan Murphy

In mobile health (mHealth), reinforcement learning algorithms that adapt to one's context without learning personalized policies might fail to distinguish between the needs of individuals.

Reinforcement Learning (RL)

Off-Policy Estimation of Long-Term Average Outcomes with Applications to Mobile Health

no code implementations30 Dec 2019 Peng Liao, Predrag Klasnja, Susan Murphy

The mHealth intervention policies, often called just-in-time adaptive interventions, are decision rules that map an individual's current state (e. g., individual's past behaviors as well as current observations of time, location, social activity, stress and urges to smoke) to a particular treatment at each of many time points.

Personalized HeartSteps: A Reinforcement Learning Algorithm for Optimizing Physical Activity

no code implementations8 Sep 2019 Peng Liao, Kristjan Greenewald, Predrag Klasnja, Susan Murphy

In this paper, we develop a Reinforcement Learning (RL) algorithm that continuously learns and improves the treatment policy embedded in the JITAI as the data is being collected from the user.

reinforcement-learning Reinforcement Learning (RL)

Group-driven Reinforcement Learning for Personalized mHealth Intervention

1 code implementation14 Aug 2017 Feiyun Zhu, Jun Guo, Zheng Xu, Peng Liao, Junzhou Huang

Due to the popularity of smartphones and wearable devices nowadays, mobile health (mHealth) technologies are promising to bring positive and wide impacts on people's health.

Clustering Decision Making +2

Cohesion-based Online Actor-Critic Reinforcement Learning for mHealth Intervention

no code implementations25 Mar 2017 Feiyun Zhu, Peng Liao, Xinliang Zhu, Yaowen Yao, Junzhou Huang

In this paper, we propose a network cohesion constrained (actor-critic) Reinforcement Learning (RL) method for mHealth.

Decision Making reinforcement-learning +1

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