Search Results for author: Michael Muma

Found 18 papers, 7 papers with code

High-Dimensional False Discovery Rate Control for Dependent Variables

no code implementations28 Jan 2024 Jasin Machkour, Michael Muma, Daniel P. Palomar

In recent years, multivariate false discovery rate (FDR) controlling methods have emerged, providing guarantees even in high-dimensional settings where the number of variables surpasses the number of samples.

Survival Analysis

FDR-Controlled Portfolio Optimization for Sparse Financial Index Tracking

no code implementations26 Jan 2024 Jasin Machkour, Daniel P. Palomar, Michael Muma

In high-dimensional data analysis, such as financial index tracking or biomedical applications, it is crucial to select the few relevant variables while maintaining control over the false discovery rate (FDR).

Portfolio Optimization

False Discovery Rate Control for Gaussian Graphical Models via Neighborhood Screening

no code implementations18 Jan 2024 Taulant Koka, Jasin Machkour, Michael Muma

Unfortunately, well-established estimators, such as the graphical lasso or neighborhood selection, are known to be susceptible to a high prevalence of false edge detections.

Graph Learning Variable Selection

Sparse PCA with False Discovery Rate Controlled Variable Selection

no code implementations16 Jan 2024 Jasin Machkour, Arnaud Breloy, Michael Muma, Daniel P. Palomar, Frédéric Pascal

Sparse principal component analysis (PCA) aims at mapping large dimensional data to a linear subspace of lower dimension.

Dimensionality Reduction Variable Selection

Fast and Robust Sparsity-Aware Block Diagonal Representation

1 code implementation2 Dec 2023 Aylin Tastan, Michael Muma, Abdelhak M. Zoubir

The block diagonal structure of an affinity matrix is a commonly desired property in cluster analysis because it represents clusters of feature vectors by non-zero coefficients that are concentrated in blocks.

Accelerated Sample-Accurate R-Peak Detectors Based on Visibility Graphs

1 code implementation European Signal Processing Conference 2023 Jonas Emrich, Taulant Koka, Sebastian Wirth, Michael Muma

Further acceleration is obtained by adopting the computationally efficient horizontal visibility graph, which has not yet been used for R-peak detection.

Heart Rate Variability QRS Complex Detection

Emergency Response Person Localization and Vital Sign Estimation Using a Semi-Autonomous Robot Mounted SFCW Radar

1 code implementation25 May 2023 Christian A. Schroth, Christian Eckrich, Ibrahim Kakouche, Stefan Fabian, Oskar von Stryk, Abdelhak M. Zoubir, Michael Muma

The large number and scale of natural and man-made disasters have led to an urgent demand for technologies that enhance the safety and efficiency of search and rescue teams.

Human Detection

Shuffled Multi-Channel Sparse Signal Recovery

no code implementations14 Dec 2022 Taulant Koka, Manolis C. Tsakiris, Michael Muma, Benjamín Béjar Haro

Assuming that we have a sensing matrix for the underlying signals, we show that the problem is equivalent to a structured unlabeled sensing problem, and establish sufficient conditions for unique recovery.

Robust and Efficient Aggregation for Distributed Learning

no code implementations1 Apr 2022 Stefan Vlaski, Christian Schroth, Michael Muma, Abdelhak M. Zoubir

This is followed by an aggregation step, which traditionally takes the form of a (weighted) average.

The Terminating-Random Experiments Selector: Fast High-Dimensional Variable Selection with False Discovery Rate Control

no code implementations12 Oct 2021 Jasin Machkour, Michael Muma, Daniel P. Palomar

The T-Rex selector controls a user-defined target false discovery rate (FDR) while maximizing the number of selected variables.

Variable Selection

Robust Regularized Locality Preserving Indexing for Fiedler Vector Estimation

no code implementations26 Jul 2021 Aylin Tastan, Michael Muma, Abdelhak M. Zoubir

The Fiedler vector of a connected graph is the eigenvector associated with the algebraic connectivity of the graph Laplacian and it provides substantial information to learn the latent structure of a graph.

Image Segmentation Semantic Segmentation

Sparsity-aware Robust Community Detection(SPARCODE)

1 code implementation18 Nov 2020 Aylin Tastan, Michael Muma, Abdelhak M. Zoubir

We compare the performance to popular graph and cluster-based community detection approaches on a variety of benchmark network and cluster analysis data sets.

Community Detection

Real Elliptically Skewed Distributions and Their Application to Robust Cluster Analysis

1 code implementation30 Jun 2020 Christian A. Schroth, Michael Muma

This article proposes a new class of Real Elliptically Skewed (RESK) distributions and associated clustering algorithms that allow for integrating robustness and skewness into a single unified cluster analysis framework.

Clustering

Robust M-Estimation Based Bayesian Cluster Enumeration for Real Elliptically Symmetric Distributions

3 code implementations4 May 2020 Christian A. Schroth, Michael Muma

Robustly determining the optimal number of clusters in a data set is an essential factor in a wide range of applications.

Person Identification

Robust Bayesian Cluster Enumeration Based on the $t$ Distribution

no code implementations29 Nov 2018 Freweyni K. Teklehaymanot, Michael Muma, Abdelhak M. Zoubir

Hence, we propose a two-step cluster enumeration algorithm that uses the expectation maximization algorithm to partition the data and estimate cluster parameters prior to the calculation of one of the robust criteria.

Clustering

Bayesian Cluster Enumeration Criterion for Unsupervised Learning

1 code implementation22 Oct 2017 Freweyni K. Teklehaymanot, Michael Muma, Abdelhak M. Zoubir

We derive a new Bayesian Information Criterion (BIC) by formulating the problem of estimating the number of clusters in an observed data set as maximization of the posterior probability of the candidate models.

Clustering

Gravitational Clustering: A Simple, Robust and Adaptive Approach for Distributed Networks

no code implementations31 Aug 2017 Patricia Binder, Michael Muma, Abdelhak M. Zoubir

The cluster enumeration exploits the fact that the highest attraction on the mobile mass units is exerted by regions with a high density of feature vectors, i. e., gravitational clusters.

Clustering

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