Search Results for author: Boian S. Alexandrov

Found 15 papers, 1 papers with code

MalwareDNA: Simultaneous Classification of Malware, Malware Families, and Novel Malware

no code implementations4 Sep 2023 Maksim E. Eren, Manish Bhattarai, Kim Rasmussen, Boian S. Alexandrov, Charles Nicholas

Here we introduce and showcase preliminary capabilities of a new method that can perform precise identification of novel malware families, while also unifying the capability for malware/benign-ware classification and malware family classification into a single framework.

Classification

SeNMFk-SPLIT: Large Corpora Topic Modeling by Semantic Non-negative Matrix Factorization with Automatic Model Selection

no code implementations21 Aug 2022 Maksim E. Eren, Nick Solovyev, Manish Bhattarai, Kim Rasmussen, Charles Nicholas, Boian S. Alexandrov

As the amount of text data continues to grow, topic modeling is serving an important role in understanding the content hidden by the overwhelming quantity of documents.

Model Selection

FedSPLIT: One-Shot Federated Recommendation System Based on Non-negative Joint Matrix Factorization and Knowledge Distillation

no code implementations4 May 2022 Maksim E. Eren, Luke E. Richards, Manish Bhattarai, Roberto Yus, Charles Nicholas, Boian S. Alexandrov

Non-negative matrix factorization (NMF) with missing-value completion is a well-known effective Collaborative Filtering (CF) method used to provide personalized user recommendations.

Collaborative Filtering Federated Learning +2

Topic Analysis of Superconductivity Literature by Semantic Non-negative Matrix Factorization

no code implementations1 Dec 2021 Valentin Stanev, Erik Skau, Ichiro Takeuchi, Boian S. Alexandrov

We utilize a recently developed topic modeling method called SeNMFk, extending the standard Non-negative Matrix Factorization (NMF) methods by incorporating the semantic structure of the text, and adding a robust system for determining the number of topics.

COVID-19 Multidimensional Kaggle Literature Organization

no code implementations17 Jul 2021 Maksim E. Eren, Nick Solovyev, Chris Hamer, Renee McDonald, Boian S. Alexandrov, Charles Nicholas

The unprecedented outbreak of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2), or COVID-19, continues to be a significant worldwide problem.

Tensor Decomposition

Boolean Hierarchical Tucker Networks on Quantum Annealers

1 code implementation12 Mar 2021 Elijah Pelofske, Georg Hahn, Daniel O'Malley, Hristo N. Djidjev, Boian S. Alexandrov

Quantum annealing is an emerging technology with the potential to solve some of the computational challenges that remain unresolved as we approach an era beyond Moore's Law.

Quantum Physics

Identification of Anomalous Diffusion Sources by Unsupervised Learning

no code implementations5 Oct 2020 Raviteja Vangara, Kim Ø. Rasmussen, Dimiter N. Petsev, Golan Bel, Boian S. Alexandrov

Fractional Brownian motion (fBm) is a ubiquitous diffusion process in which the memory effects of the stochastic transport result in the mean squared particle displacement following a power law, $\langle {\Delta r}^2 \rangle \sim t^{\alpha}$, where the diffusion exponent $\alpha$ characterizes whether the transport is subdiffusive, ($\alpha<1$), diffusive ($\alpha = 1$), or superdiffusive, ($\alpha >1$).

Determination of Latent Dimensionality in International Trade Flow

no code implementations29 Feb 2020 Duc P. Truong, Erik Skau, Vladimir I. Valtchinov, Boian S. Alexandrov

Nonnegative RESCAL computes a low dimensional tensor representation by finding the latent space containing multiple modalities.

Clustering Model Selection

Identification of release sources in advection-diffusion system by machine learning combined with Green function inverse method

no code implementations12 Dec 2016 Valentin G. Stanev, Filip L. Iliev, Scott Hansen, Velimir V. Vesselinov, Boian S. Alexandrov

The identification of sources of advection-diffusion transport is based usually on solving complex ill-posed inverse models against the available state- variable data records.

Nonnegative Matrix Factorization for identification of unknown number of sources emitting delayed signals

no code implementations12 Dec 2016 Filip L. Iliev, Valentin G. Stanev, Velimir V. Vesselinov, Boian S. Alexandrov

Especially difficult is the case when the number of sources of the signals with delays is unknown and has to be determined from the data as well.

blind source separation

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