Results 61 to 70 of about 20,683 (150)

Enhanced Topic Modeling for Textual Data Supervisor: Professor Tomaso Erseghe tomaso.erseghe@unipd.it

open access: yes, 2023
openIn this thesis, we present an innovative approach for topic modeling and text classification using a combination of Non-Negative Matrix Factorization (NMF), Variational Autoencoder (VAE), and Bidirectional Long Short-Term Memory (Bi-LSTM) models. Our
JAVIDFAR, MASOUD
core  

Inertia-Constrained Pixel-by-Pixel Nonnegative Matrix Factorisation: A Hyperspectral Unmixing Method Dealing with Intra-Class Variability

open access: yesRemote Sensing, 2018
Blind source separation is a common processing tool to analyse the constitution of pixels of hyperspectral images. Such methods usually suppose that pure pixel spectra (endmembers) are the same in all the image for each class of materials.
Charlotte Revel   +4 more
doaj   +1 more source

Comparison of Standard-NMF and Full-NMF over the DLBCL data of Data set 1.

open access: yes, 2013
The matrix produced by using the DLBCL samples of Data set 1 as rows and their DNA copy number profiles as columns was used to test the distinct manners of running NMF. Full-NMF stands for the procedure which runs over all data, while Standard-NMF stands
Emanuele Zucca (487408)   +5 more
core   +1 more source

Enhancing Hyperspectral Unmixing With Two-Stage Multiplicative Update Nonnegative Matrix Factorization

open access: yesIEEE Access, 2019
Nonnegative matrix factorization (NMF) is a powerful tool for hyperspectral unmixing (HU). This method factorizes a hyperspectral cube into constituent endmembers and their fractional abundances.
Li Sun   +3 more
doaj   +1 more source

Another Robust NMF: Rethinking the Hyperbolic Tangent Function and Locality Constraint

open access: yesIEEE Access, 2019
Non-negative matrix factorization (NMF) is a classical data analysis tool for clustering tasks. It usually considers the squared loss to measure the reconstruction error, thus it is sensitive to the presence of outliers. Looking into the literature, most
Xingyu Shen   +4 more
doaj   +1 more source

Using NMF to decompose the NMF-based matrix from the patient–disease diagnosis matrix.

open access: yes, 2018
Using NMF to decompose the NMF-based matrix from the patient–disease diagnosis matrix.
Vincent S. Tseng (181095)   +2 more
core   +1 more source

Comparison of Compact-NMF and Full-NMF over the DLBCL data of Data set 1.

open access: yes, 2013
The matrix produced by using the DLBCL samples of Data set 1 as rows and their DNA copy number profiles as columns was used to test the distinct manners of running NMF.
Emanuele Zucca (487408)   +5 more
core   +1 more source

Max-margin semi-NMF

open access: yes, 2011
In this paper, we propose a maximum-margin framework for classification using Non-negative Matrix Factorization. In contrast to previous approaches where the classification and matrix factorization are separated, we incorporate the maximum margin ...
Patras, I., Kotsia, I., Kumar, B.
core   +4 more sources

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