U radu je predstavljen pristup za modelovanje tema i klasifikaciju tekstualnih dokumenata. Konkretno, vršena 1) primena LDA (Latent Dirichlet Allocation) nad tekstom zarad dobijanja tema, pri čemu evaluacija rađena kvalitativno, kroz semantiku pronađenih tema; 2) klasifikacija dokumenta primenom reprezentacije teksta dobijene kombinacijom tf-idf obeležja izvučenih pomoću LSA Semantic Analysis);...

Linear discriminant analysis (LDA) is a classical approach for dimensionality reduction. It aims to maximize between-class scatter and minimize within-class scatter, thus maximize the class discriminant. However, for undersampled problems where the data dimensionality is larger than the sample size, all scatter matrices are singular and the classical LDA encounters computational difficulty. Rec...

An analysis of the general representation of the occupation number matrix on density functional theory in conjunction with the generalized Hubbard model is presented. A central fact that will be addressed is that the total charge density cannot be broken down into simple atomic contributions. This fact means that the orbital occupations are not well defined. Different representations of the occ...

A significant amount of speech is typically required for speaker verification system development and evaluation, especially in the presence of large intersession variability. This paper introduces a source and utterance-duration normalized linear discriminant analysis (SUN-LDA) approaches to compensate session variability in short-utterance i-vector speaker verification systems. Two variations ...

Facial feature extraction with enhanced discriminatory power plays an important role in face recognition (FR) applications. Linear discriminant analysis (LDA) is a powerful tool used for dimensionality reduction and feature extraction in FR tasks. However, the classification performance of traditional LDA is often degraded, due to two factors: 1) their classification accuracies suffer from the ...

In this thesis, we were interested in the interplay between the spin-orbit coupling and electronic correlations in condensedmatter physics. The spin-orbit interaction has indeed been found to play a significant role in the properties of a growingvariety of materials, such as the topological band insulators or the iridium-based 5d-transition metal oxides. Particularly,strontium irida...

OBJECTIVES To determine prognostic factors of clinically relevant radiographic progression (CRRP) in patients with rheumatoid arthritis (RA) achieving remission or low disease activity (LDA) in clinical practice. METHODS Using data from a nationwide, multicenter, prospective study in Japan, we evaluated 198 biological disease-modifying antirheumatic drug (bDMARD)-naïve RA patients who were in...