Search Results for author: Peter J. Haas

Found 5 papers, 0 papers with code

Stochastic Package Queries in Probabilistic Databases

no code implementations11 Mar 2021 Matteo Brucato, Nishant Yadav, Azza Abouzied, Peter J. Haas, Alexandra Meliou

We provide methods for specifying -- via a SQL extension -- and processing stochastic package queries (SPQs), in order to solve optimization problems over uncertain data, right where the data resides.

Decision Making Decision Making Under Uncertainty +1 Databases

Temporally-Biased Sampling Schemes for Online Model Management

no code implementations11 Jun 2019 Brian Hentschel, Peter J. Haas, Yuanyuan Tian

To maintain the accuracy of supervised learning models in the presence of evolving data streams, we provide temporally-biased sampling schemes that weight recent data most heavily, with inclusion probabilities for a given data item decaying over time according to a specified "decay function".

Management

Unknown Examples & Machine Learning Model Generalization

no code implementations24 Aug 2018 Yeounoh Chung, Peter J. Haas, Eli Upfal, Tim Kraska

Over the past decades, researchers and ML practitioners have come up with better and better ways to build, understand and improve the quality of ML models, but mostly under the key assumption that the training data is distributed identically to the testing data.

BIG-bench Machine Learning Selection bias

Temporally-Biased Sampling for Online Model Management

no code implementations29 Jan 2018 Brian Hentschel, Peter J. Haas, Yuanyuan Tian

Moreover, time-biasing lets the models adapt to recent changes in the data while -- unlike in a sliding-window approach -- still keeping some old data to ensure robustness in the face of temporary fluctuations and periodicities in the data values.

Databases

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