Search Results for author: Vassilis Digalakis Jr

Found 7 papers, 2 papers with code

Towards Stable Machine Learning Model Retraining via Slowly Varying Sequences

no code implementations28 Mar 2024 Dimitris Bertsimas, Vassilis Digalakis Jr, Yu Ma, Phevos Paschalidis

We consider the task of retraining machine learning (ML) models when new batches of data become available.

Feature Importance

BackboneLearn: A Library for Scaling Mixed-Integer Optimization-Based Machine Learning

1 code implementation22 Nov 2023 Vassilis Digalakis Jr, Christos Ziakas

We present BackboneLearn: an open-source software package and framework for scaling mixed-integer optimization (MIO) problems with indicator variables to high-dimensional problems.

Clustering

Data Analytics with Differential Privacy

no code implementations20 Jul 2023 Vassilis Digalakis Jr

Our work includes a detailed theoretical analysis of the distributed, differentially private entropy estimator which we use in one of our algorithms, as well as a detailed experimental evaluation, using both synthetic and real-world data.

Improving Stability in Decision Tree Models

no code implementations26 May 2023 Dimitris Bertsimas, Vassilis Digalakis Jr

Owing to their inherently interpretable structure, decision trees are commonly used in applications where interpretability is essential.

Slowly Varying Regression under Sparsity

1 code implementation22 Feb 2021 Dimitris Bertsimas, Vassilis Digalakis Jr, Michael Linghzi Li, Omar Skali Lami

The algorithm is highly scalable, allowing us to train models with thousands of parameters.

regression

Frequency Estimation in Data Streams: Learning the Optimal Hashing Scheme

no code implementations17 Jul 2020 Dimitris Bertsimas, Vassilis Digalakis Jr

We present a novel approach for the problem of frequency estimation in data streams that is based on optimization and machine learning.

BIG-bench Machine Learning

The Backbone Method for Ultra-High Dimensional Sparse Machine Learning

no code implementations11 Jun 2020 Dimitris Bertsimas, Vassilis Digalakis Jr

We present the backbone method, a generic framework that enables sparse and interpretable supervised machine learning methods to scale to ultra-high dimensional problems.

BIG-bench Machine Learning regression +1

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