Search Results for author: Rick L. Stevens

Found 8 papers, 4 papers with code

Influencing factors on false positive rates when classifying tumor cell line response to drug treatment

no code implementations17 Oct 2023 Priyanka Vasanthakumari, Thomas Brettin, Yitan Zhu, Hyunseung Yoo, Maulik Shukla, Alexander Partin, Fangfang Xia, Oleksandr Narykov, Rick L. Stevens

Several error analysis metrics such as the false positive rate (FPR), and the prediction uncertainty are evaluated, and the results are summarized by cancer type and drug mechanism of action (MoA) category.

Drug Response Prediction

Blending Imitation and Reinforcement Learning for Robust Policy Improvement

no code implementations3 Oct 2023 Xuefeng Liu, Takuma Yoneda, Rick L. Stevens, Matthew R. Walter, Yuxin Chen

Integral to RPI are Robust Active Policy Selection (RAPS) and Robust Policy Gradient (RPG), both of which reason over whether to perform state-wise imitation from the oracles or learn from its own value function when the learner's performance surpasses that of the oracles in a specific state.

Imitation Learning reinforcement-learning +1

Deep learning methods for drug response prediction in cancer: predominant and emerging trends

no code implementations18 Nov 2022 Alexander Partin, Thomas S. Brettin, Yitan Zhu, Oleksandr Narykov, Austin Clyde, Jamie Overbeek, Rick L. Stevens

A wave of recent papers demonstrates promising results in predicting cancer response to drug treatments while utilizing deep learning methods.

Drug Response Prediction

Cost-Effective Online Contextual Model Selection

no code implementations13 Jul 2022 Xuefeng Liu, Fangfang Xia, Rick L. Stevens, Yuxin Chen

In particular, we focus on the task of selecting pre-trained classifiers, and propose a contextual active model selection algorithm (CAMS), which relies on a novel uncertainty sampling query criterion defined on a given policy class for adaptive model selection.

Model Selection

Converting tabular data into images for deep learning with convolutional neural networks

1 code implementation Scientific Reports 2021 Yitan Zhu, Thomas Brettin, Fangfang Xia, Alexander Partin, Maulik Shukla, Hyunseung Yoo, Yvonne A. Evrard, James H. Doroshow, Rick L. Stevens

Convolutional neural networks (CNNs) have been successfully used in many applications where important information about data is embedded in the order of features, such as speech and imaging.

Spatial Graph Attention and Curiosity-driven Policy for Antiviral Drug Discovery

4 code implementations ICLR 2022 Yulun Wu, Mikaela Cashman, Nicholas Choma, Érica T. Prates, Verónica G. Melesse Vergara, Manesh Shah, Andrew Chen, Austin Clyde, Thomas S. Brettin, Wibe A. de Jong, Neeraj Kumar, Martha S. Head, Rick L. Stevens, Peter Nugent, Daniel A. Jacobson, James B. Brown

We developed Distilled Graph Attention Policy Network (DGAPN), a reinforcement learning model to generate novel graph-structured chemical representations that optimize user-defined objectives by efficiently navigating a physically constrained domain.

Drug Discovery Graph Attention

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