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1.
Markov chain approach to rectifier circuits
Vijayan Vijesh, K. Satheesh Kumar, Mohanachandran Nair Sindhu Swapna, Sankaranarayana Iyer Sankararaman, 2024, objavljeni znanstveni prispevek na konferenci

Ključne besede: Markov chain, rectifier, graph theory
Objavljeno v RUNG: 15.04.2024; Ogledov: 512; Prenosov: 0
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2.
Markov chain approach to rectifier circuits
Mohanachandran Nair Sindhu Swapna, 2022, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: Markov chain, rectifier circuits, graph theory
Objavljeno v RUNG: 19.12.2022; Ogledov: 1096; Prenosov: 0
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3.
Semihypergroup-Based Graph for Modeling International Spread of COVID-n in Social Systems
Narjes Firouzkouhi, Reza Ameri, Abbas Amini, Hashem Bordbar, 2022, izvirni znanstveni članek

Opis: Graph theoretic techniques have been widely applied to model many types of links in social systems. Also, algebraic hypercompositional structure theory has demonstrated its systematic application in some problems. Influenced by these mathematical notions, a novel semihypergroup based graph (SBG) of G = hH, Ei is constructed through the fundamental relation gn on H, where semihypergroup H is appointed as the set of vertices and E is addressed as the set of edges on SBG. Indeed, two arbitrary vertices x and y are adjacent if xgny. The connectivity of graph G is characterized by xg y, whereby the connected components SBG of G would be exactly the elements of the fundamental group H/g . Based on SBG, some fundamental characteristics of the graph such as complete, regular, Eulerian, isomorphism, and Cartesian products are discussed along with illustrative examples to clarify the relevance between semihypergroup H and its corresponding graph. Furthermore, the notions of geometric space, block, polygonal, and connected components are introduced in terms of the developed SBG. To formulate the links among individuals/countries in the wake of the COVID (coronavirus disease) pandemic, a theoretical SBG methodology is presented to analyze and simplify such social systems. Finally, the developed SBG is used to model the trend diffusion of the viral disease COVID-n in social systems (i.e., countries and individuals).
Ključne besede: graph theory, hypergroup, fundamental relation, social systems, geometric space
Objavljeno v RUNG: 23.11.2022; Ogledov: 1168; Prenosov: 0
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4.
Bioacoustic signal analysis through complex network features
Mohanachandran Nair Sindhu Swapna, RAJ VIMAL, Sankararaman S, 2022, izvirni znanstveni članek

Opis: The paper proposes a graph-theoretical approach to auscultation, bringing out the potential of graph features in classifying the bioacoustics signals. The complex network analysis of the bioacoustics signals - vesicular (VE) and bronchial (BR) breath sound - of 48 healthy persons are carried out for understanding the airflow dynamics during respiration. The VE and BR are classified by the machine learning techniques extracting the graph features – the number of edges (E), graph density (D), transitivity (T), degree centrality (Dcg) and eigenvector centrality (Ecg). The higher value of E, D, and T in BR indicates the temporally correlated airflow through the wider tracheobronchial tract resulting in sustained high-intense low-frequencies. The frequency spread and high-frequencies in VE, arising due to the less correlated airflow through the narrow segmental bronchi and lobar, appears as a lower value for E, D, and T. The lower values of Dcg and Ecg justify the inferences from the spectral and other graph parameters. The study proposes a methodology in remote auscultation that can be employed in the current scenario of COVID-19.
Ključne besede: Bioacoustic signal, Graph theory, Complex network, Lung auscultation
Objavljeno v RUNG: 30.06.2022; Ogledov: 1388; Prenosov: 0
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5.
Condition number study of graph theory based preconditioners for isogeometric discretization of Poisson equation
K. Gahalaut, Satyendra Tomar, 2012, končno poročilo o rezultatih raziskav

Ključne besede: isogeometric discretization, graph theory, preconditioning, condition number
Objavljeno v RUNG: 13.11.2018; Ogledov: 3131; Prenosov: 0
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6.
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