Search Results for author: Helen Zhou

Found 11 papers, 4 papers with code

MoCo-Transfer: Investigating out-of-distribution contrastive learning for limited-data domains

no code implementations15 Nov 2023 YuWen Chen, Helen Zhou, Zachary C. Lipton

Medical imaging data is often siloed within hospitals, limiting the amount of data available for specialized model development.

Contrastive Learning

Business Metric-Aware Forecasting for Inventory Management

no code implementations24 Aug 2023 Helen Zhou, Sercan O. Arik, Jingtao Wang

We explore a wide range of plausible cost trade-off scenarios, and empirically demonstrate that end-to-end optimization often outperforms optimization of standard business-agnostic forecasting metrics (by up to 45. 7% for a simple scaling model, and up to 54. 0% for an LSTM encoder-decoder model).

Management Time Series

Evaluating Model Performance in Medical Datasets Over Time

1 code implementation22 May 2023 Helen Zhou, YuWen Chen, Zachary C. Lipton

Machine learning (ML) models deployed in healthcare systems must face data drawn from continually evolving environments.

Model Evaluation in Medical Datasets Over Time

no code implementations14 Nov 2022 Helen Zhou, YuWen Chen, Zachary C. Lipton

Machine learning models deployed in healthcare systems face data drawn from continually evolving environments.

Domain Adaptation under Missingness Shift

1 code implementation3 Nov 2022 Helen Zhou, Sivaraman Balakrishnan, Zachary C. Lipton

Rates of missing data often depend on record-keeping policies and thus may change across times and locations, even when the underlying features are comparatively stable.

Domain Adaptation

Predicting Mortality Risk in Viral and Unspecified Pneumonia to Assist Clinicians with COVID-19 ECMO Planning

1 code implementation2 Jun 2020 Helen Zhou, Cheng Cheng, Zachary C. Lipton, George H. Chen, Jeremy C. Weiss

Finally, the PEER score is provided in the form of a nomogram for direct calculation of patient risk, and can be used to highlight at-risk patients among critical care patients eligible for ECMO.

Decompensation

Treatment Policy Learning in Multiobjective Settings with Fully Observed Outcomes

1 code implementation1 Jun 2020 Soorajnath Boominathan, Michael Oberst, Helen Zhou, Sanjat Kanjilal, David Sontag

In several medical decision-making problems, such as antibiotic prescription, laboratory testing can provide precise indications for how a patient will respond to different treatment options.

Decision Making

Digital Stylometry: Linking Profiles Across Social Networks

no code implementations17 May 2016 Soroush Vosoughi, Helen Zhou, Deb Roy

There is an ever growing number of users with accounts on multiple social media and networking sites.

Enhanced Twitter Sentiment Classification Using Contextual Information

no code implementations WS 2015 Soroush Vosoughi, Helen Zhou, Deb Roy

This combined classifier outperforms the purely linguistic classifier, showing that integrating the rich contextual information available on Twitter into sentiment classification is a promising direction of research.

Classification General Classification +2

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