Search Results for author: Feiyun Zhu

Found 14 papers, 2 papers with code

Robust Actor-Critic Contextual Bandit for Mobile Health (mHealth) Interventions

no code implementations27 Feb 2018 Feiyun Zhu, Jun Guo, Ruoyu Li, Junzhou Huang

Extensive experiment results on two datasets demonstrate that our method can achieve almost identical results compared with state-of-the-art contextual bandit methods on the dataset without outliers, and significantly outperform those state-of-the-art methods on the badly noised dataset with outliers in a variety of parameter settings.

Decision Making

Adaptive Graph Convolutional Neural Networks

2 code implementations10 Jan 2018 Ruoyu Li, Sheng Wang, Feiyun Zhu, Junzhou Huang

Graph Convolutional Neural Networks (Graph CNNs) are generalizations of classical CNNs to handle graph data such as molecular data, point could and social networks.

Metric Learning

Hyperspectral Unmixing: Ground Truth Labeling, Datasets, Benchmark Performances and Survey

no code implementations17 Aug 2017 Feiyun Zhu

However, the HU research has been constrained a lot by three factors: (a) the number of hyperspectral images (especially the ones with ground truths) are very limited; (b) the ground truths of most hyperspectral images are not shared on the web, which may cause lots of unnecessary troubles for researchers to evaluate their algorithms; (c) the codes of most state-of-the-art methods are not shared, which may also delay the testing of new methods.

Hyperspectral Unmixing

Robust Contextual Bandit via the Capped-$\ell_{2}$ norm

no code implementations17 Aug 2017 Feiyun Zhu, Xinliang Zhu, Sheng Wang, Jiawen Yao, Junzhou Huang

In the critic updating, the capped-$\ell_{2}$ norm is used to measure the approximation error, which prevents outliers from dominating our objective.

Decision Making

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

WSISA: Making Survival Prediction From Whole Slide Histopathological Images

no code implementations CVPR 2017 Xinliang Zhu, Jiawen Yao, Feiyun Zhu, Junzhou Huang

Different from existing state-of-the-arts image-based survival models which extract features using some patches from small regions of WSIs, the proposed framework can efficiently exploit and utilize all discriminative patterns in WSIs to predict patients' survival status.

Survival Analysis Survival Prediction

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

Accurate Urban Road Centerline Extraction from VHR Imagery via Multiscale Segmentation and Tensor Voting

no code implementations25 Aug 2015 Guangliang Cheng, Feiyun Zhu, Shiming Xiang, Chunhong Pan

Finally, to overcome the ineffectiveness of current methods in the road intersection, a fitting based road centerline connection algorithm is proposed.

Road Segmentation

10,000+ Times Accelerated Robust Subset Selection (ARSS)

no code implementations12 Sep 2014 Feiyun Zhu, Bin Fan, Xinliang Zhu, Ying Wang, Shiming Xiang, Chunhong Pan

Subset selection from massive data with noised information is increasingly popular for various applications.

Action Recognition Collaborative Filtering +16

Effective Spectral Unmixing via Robust Representation and Learning-based Sparsity

no code implementations2 Sep 2014 Feiyun Zhu, Ying Wang, Bin Fan, Gaofeng Meng, Chunhong Pan

Based on this observation, we exploit a learning-based sparsity method to simultaneously learn the HU results and a sparse guidance map.

Hyperspectral Unmixing

Structured Sparse Method for Hyperspectral Unmixing

no code implementations19 Mar 2014 Feiyun Zhu, Ying Wang, Shiming Xiang, Bin Fan, Chunhong Pan

With this constraint, our method can learn a compact space, where highly similar pixels are grouped to share correlated sparse representations.

Hyperspectral Unmixing

Spectral Unmixing via Data-guided Sparsity

no code implementations13 Mar 2014 Feiyun Zhu, Ying Wang, Bin Fan, Gaofeng Meng, Shiming Xiang, Chunhong Pan

Hyperspectral unmixing, the process of estimating a common set of spectral bases and their corresponding composite percentages at each pixel, is an important task for hyperspectral analysis, visualization and understanding.

Hyperspectral Unmixing

Robust Hyperspectral Unmixing with Correntropy based Metric

no code implementations31 May 2013 Ying Wang, Chunhong Pan, Shiming Xiang, Feiyun Zhu

In addition, with sparsity constraints, our model can naturally generate sparse abundances.

Hyperspectral Unmixing

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