Search Results for author: Alnur Ali

Found 9 papers, 2 papers with code

The Lifecycle of a Statistical Model: Model Failure Detection, Identification, and Refitting

no code implementations8 Feb 2022 Alnur Ali, Maxime Cauchois, John C. Duchi

The statistical machine learning community has demonstrated considerable resourcefulness over the years in developing highly expressive tools for estimation, prediction, and inference.

Time Series Time Series Analysis

Predictive Inference with Weak Supervision

no code implementations20 Jan 2022 Maxime Cauchois, Suyash Gupta, Alnur Ali, John Duchi

The expense of acquiring labels in large-scale statistical machine learning makes partially and weakly-labeled data attractive, though it is not always apparent how to leverage such data for model fitting or validation.

Conformal Prediction Structured Prediction +1

Accelerated Gradient Flow: Risk, Stability, and Implicit Regularization

no code implementations20 Jan 2022 Yue Sheng, Alnur Ali

Acceleration and momentum are the de facto standard in modern applications of machine learning and optimization, yet the bulk of the work on implicit regularization focuses instead on unaccelerated methods.

regression

Minimum-Distortion Embedding

1 code implementation3 Mar 2021 Akshay Agrawal, Alnur Ali, Stephen Boyd

Our software scales to data sets with millions of items and tens of millions of distortion functions.

Dimensionality Reduction

Robust Validation: Confident Predictions Even When Distributions Shift

no code implementations10 Aug 2020 Maxime Cauchois, Suyash Gupta, Alnur Ali, John C. Duchi

One strategy -- coming from robust statistics and optimization -- is thus to build a model robust to distributional perturbations.

valid

The Implicit Regularization of Stochastic Gradient Flow for Least Squares

no code implementations ICML 2020 Alnur Ali, Edgar Dobriban, Ryan J. Tibshirani

We study the implicit regularization of mini-batch stochastic gradient descent, when applied to the fundamental problem of least squares regression.

regression

A Continuous-Time View of Early Stopping for Least Squares

no code implementations23 Oct 2018 Alnur Ali, J. Zico Kolter, Ryan J. Tibshirani

Our primary focus is to compare the risk of gradient flow to that of ridge regression.

regression

Communication-Avoiding Optimization Methods for Distributed Massive-Scale Sparse Inverse Covariance Estimation

1 code implementation30 Oct 2017 Penporn Koanantakool, Alnur Ali, Ariful Azad, Aydin Buluc, Dmitriy Morozov, Leonid Oliker, Katherine Yelick, Sang-Yun Oh

Across a variety of scientific disciplines, sparse inverse covariance estimation is a popular tool for capturing the underlying dependency relationships in multivariate data.

Clustering

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