no code implementations • 13 Sep 2021 • Sneha Gathani, Madelon Hulsebos, James Gale, Peter J. Haas, Çağatay Demiralp
The fundamental goal of business data analysis is to improve business decisions using data.
no code implementations • 11 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
no code implementations • 11 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".
no code implementations • 24 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.
no code implementations • 29 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