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Littérature scientifique sur le sujet « ENERGY MATRICES »

Auteur : Grafiati

Publié le 16 janvier 2024

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Articles de revues sur le sujet "ENERGY MATRICES"

Bravo, Diego, Florencia Cubría et Juan Rada. « Energy of matrices ». Applied Mathematics and Computation 312 (novembre 2017) : 149–57. http://dx.doi.org/10.1016/j.amc.2017.05.051.

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Kharaghani, H., et B. Tayfeh-Rezaie. « On the energy of (0,1)-matrices ». Linear Algebra and its Applications 429, n^o 8-9 (octobre 2008) : 2046–51. http://dx.doi.org/10.1016/j.laa.2008.06.001.

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Borodin, Alexei, et Sylvia Serfaty. « Renormalized Energy Concentration in Random Matrices ». Communications in Mathematical Physics 320, n^o 1 (16 avril 2013) : 199–244. http://dx.doi.org/10.1007/s00220-013-1716-z.

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Nikiforov, Vladimir. « The energy of graphs and matrices ». Journal of Mathematical Analysis and Applications 326, n^o 2 (février 2007) : 1472–75. http://dx.doi.org/10.1016/j.jmaa.2006.03.072.

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Nikiforov, Vladimir. « Graphs and matrices with maximal energy ». Journal of Mathematical Analysis and Applications 327, n^o 1 (mars 2007) : 735–38. http://dx.doi.org/10.1016/j.jmaa.2006.03.089.

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Tafrikan, Mohammad, et Mohammad Ghani. « Iterative Method of Thomas Algorithm on The Case Study of Energy Equation ». Postulat : Jurnal Inovasi Pendidikan Matematika 3, n^o 1 (26 juillet 2022) : 14. http://dx.doi.org/10.30587/postulat.v3i1.4346.

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Implicit method is one of the finite difference method and is widely used for discretization some of ordinary or partial differential equations, such like: advection equation, heat transfer equation, burger equation, and many others. Implicit method is unconditionally stable and has been proved with the approximation of Von-Neumann stability criterion. Actually, implicit method is always identical to block matrices (tri-diagonal matrices or penta-diagonal matrices). These matrices can be solved numerically by Thomas algorithm including Gauss elimination using pivot or not, backward or forward substitution. Furthermore, it can be also solved using LU decomposition method with the elimination of lower triangle matrices first and then the elimination of upper triangle matrices. In this research, Thomas algorithm is used to solve numerically for the problem of convective flow on boundary layer, especially for energy equation with the variation of Prandtl number ( ).

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Gutman, Ivan. « Spectrum and energy of the Sombor matrix ». Vojnotehnicki glasnik 69, n^o 3 (2021) : 551–61. http://dx.doi.org/10.5937/vojtehg69-31995.

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Introduction/purpose: The Sombor matrix is a vertex-degree-based matrix associated with the Sombor index. The paper is concerned with the spectral properties of the Sombor matrix. Results: Equalities and inequalities for the eigenvalues of the Sombor matrix are obtained, from which two fundamental bounds for the Sombor energy (= energy of the Sombor matrix) are established. These bounds depend on the Sombor index and on the "forgotten" topological index. Conclusion: The results of the paper contribute to the spectral theory of the Sombor matrix, as well as to the general spectral theory of matrices associated with vertex-degree-based graph invariants.

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Godsi, Oded, Christian R. Evenhuis et Michael A. Collins. « Interpolation of multidimensional diabatic potential energy matrices ». Journal of Chemical Physics 125, n^o 10 (14 septembre 2006) : 104105. http://dx.doi.org/10.1063/1.2338912.

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Bofill, Josep Maria, Àngels Povill et Jaime Rubio. « Energy partitioning using two-electron average matrices ». Chemical Physics Letters 222, n^o 1-2 (mai 1994) : 51–57. http://dx.doi.org/10.1016/0009-2614(94)00322-x.

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Muratova, E. N., et A. A. Shemukhin. « Nanoscale matrices to transport high-energy beams ». Journal of Physics : Conference Series 917 (novembre 2017) : 092016. http://dx.doi.org/10.1088/1742-6596/917/9/092016.

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Thèses sur le sujet "ENERGY MATRICES"

Hisada, Kenji. « Triplet Energy Transfer and Migration in Polymer Matrices ». Kyoto University, 1998. http://hdl.handle.net/2433/157030.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである
Kyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第7329号
工博第1704号
新制||工||1104(附属図書館)
UT51-98-G258
京都大学大学院工学研究科高分子化学専攻
(主査)教授山本雅英, 教授山岡仁史, 教授増田俊夫
学位規則第4条第1項該当

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Fanfarillo, Michael. « Activation of carbon dioxide and dioxygen in low-energy matrices ». Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236314.

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Costa, Emerson Chagas. « Estudo de fluxo de potencia com aplicação de metodos diretos na resolução de sistemas de equações lineares ». [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306749.

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Orientador: Aurelio Ribeiro Leite de Oliveira
Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica
Made available in DSpace on 2018-08-10T18:21:37Z (GMT). No. of bitstreams: 1 Costa_EmersonChagas_M.pdf: 3002139 bytes, checksum: 1caa6878e65459343f93aa39d2841fa3 (MD5) Previous issue date: 2008
Resumo: Diante de um sistema elétrico de potência brasileiro, complexo e gigantesco, o presente trabalho trata do estudo de fluxo de potência, por meio de simulação com os sistemas de 30 e 118 barras da IEEE (Institute of Electrical and Electronics Engineers) com os métodos desacoplados e utilizando os métodos diretos de decomposições de matrizes...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: Considering a large-scale and complex Brazil electric power system, the present work concerns the study of power flows, through simulations with the 30 and 118 bus system of the IEEE (Institute of Electrical and Electronics Engineers) applying the uncoupled methods and the direct methods of matrix decomposition...Note: The complete abstract is available with the full electronic digital thesis or dissertations
Mestrado
Sistemas de Energia Eletrica
Mestre em Matemática Aplicada

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Dolz, Zaragozá Manuel Francisco. « Energy-aware matrix computacion on multirhreaded architectures ». Doctoral thesis, Universitat Jaume I, 2014. http://hdl.handle.net/10803/669082.

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Desde hace décadas, la computación de altas prestaciones ha concentrado sus esfuerzos en la optimización de algoritmos aplicados a la resolución de problemas complejos que aparecen en un amplio abanico de aplicaciones de casi todas las áreas científicas y tecnológicas. En este sentido el uso de herramientas y técnicas, tales como la computación paralela y distribuida, han impulsado la mejora de las prestaciones en este tipo de algoritmos y aplicaciones. Hoy en día, el término optimización hace referencia a la reducción del tiempo de ejecución, aunque también a la energía necesaria para su cómputo. La búsqueda de soluciones verdes o fuentes de energía alternativas que permitan reducir las emisiones de CO2 a la atmósfera demuestran la creciente preocupación por el medio ambiente. En el ámbito de las tecnologías de la información y, más concretamente, en la computación de altas prestaciones, la comunidad científico-técnica muestra especial interés en el desarrollo de componentes, herramientas y técnicas que permitan minimizar el consumo energético. En este sentido, se pretende que las aplicaciones sean conscientes de la energía disipada, tanto en el sistema operativo como en las bibliotecas de cómputo, comunicación y aplicaciones paralelas. Los objetivos de la presente tesis están orientados al estudio, análisis y aprovechamiento de las técnicas de ahorro disponibles en las arquitecturas de computadores multinúcleo e híbridas (CPU-GPU) actuales actuales con el fin de mejorar el rendimiento energético en aplicaciones que requieren la resolución de problemas de álgebra lineal densa y dispersa. Los resultados experimentales obtenidos que validan las ganancias conseguidas mediante medidores de energía, consiguiendo destacables ahorros energéticos y manteniendo un constante compromiso entre prestaciones y ahorros generados.

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Agirtopcu, Yasin. « Investigations On The Permeability Of Acrylic Powder Structures ». Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1045343/index.pdf.

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There are many examples where creation and usage of porous substrates play important roles in various fields of application in material science and technology. In the manufacture of ceramic products, as an alternative to the plaster molds, porous resin molds are used in order to resolve the drawbacks that result A porous substrate can be produced by various ways. In this study, porous polymeric matrices of poly(methyl methacrylate) (PMMA) and poly(methyl methacrylate-co-2-hydroxyethyl methacrylate) [poly(MMA-HEMA)] polymers were prepared by connecting the polymer microspheres to each other by an epoxy adhesive. To improve the surface properties, methyl methacrylate (MMA) was copolymerized with 2-hydroxyethyl methacrylate (HEMA). The microspheres used were synthesized by suspension polymerization and characterization was done by Nuclear Magnetic Resonance (NMR), Particle Size Analyzer and Scanning Electron Microscope (SEM). The porous samples were prepared with PMMA and poly(MMA-HEMA) copolymer microspheres with two different HEMA contents and their surface energies were measured. In addition, the effect of mean particle diameter of the microspheres used and the epoxy content of the solution used to bind the microspheres, on the impregnation capacity, morphology and the impact strength of the porous samples prepared, were studied. Inclusion of HEMA into the formulation improved the impregnation capacity of the samples. Using microspheres with narrower particle size distribution resulted in larger representative capillary radii and higher rate of impregnation of the samples. Increasing the epoxy content of the solution used to bind the beads, increased the impact strengths of the samples prepared.

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Stepanian, S. G., A. Yu Ivanov et L. Adamowicz. « Effect of low-temperature argon matrices on the IR spectra and structure of flexible N-acetylglycine molecules ». AMER INST PHYSICS, 2016. http://hdl.handle.net/10150/622884.

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A study of how the matrix environment impacts the structure and IR spectra of N-acetylglycine conformers. The conformational composition of this compound is determined according to an analysis of the FTIR spectra of N-acetylglycine isolated in low temperature argon matrices. Bands of three N-acetylglycine conformers are identified based on the spectra: one major and two minor. The structure of all observed conformers is stabilized by different intramolecular hydrogen bonds. The Gibbs free energies of the conformers were calculated (CCSD(T)/CBS method), and these energy values were used to calculate conformer population at a temperature of 360 K, of which 85.3% belonged to the main conformer, and 9.6% and 5.1% to the minor conformers. We also determined the size and shape of the cavities that form when the N-acetylglycine conformers are embedded in the argon crystal during matrix deposition. It is established that the most energetically favorable cavity for the planar main conformer is the cavity that forms when 7 argon atoms are replaced. At the same time, bulky minor conformers were embedded into cavities that correspond to 8 removed argon atoms. We calculated the complexation energy between argon clusters and conformers, and the deformation energy of the argon crystal and the N-acetylglycine conformers. The matrix-induced shifts to the conformer oscillation frequency are calculated. Published by AIP Publishing.

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Cougoulic, Florian. « Nuclear effects in high-energy proton-nucleus collisions : transverse momentum broadening of energetic parton systems and soft anomalous dimension matrices ». Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0086/document.

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Dans le Modèle Standard de la physique des particules, la théorie de l’interaction forte, la chromodynamique quantique (QCD), est une théorie de jauge de groupe de symétrie SU (Nc) par rapport au nombre quantique de couleur. QCD obéit à la propriété de liberté asymptotique, permettant le calcul d’observables physiques à haute énergie en utilisant la QCD perturbative (pQCD). Cette thèse traite de la description en pQCD des taux de production de hadrons dans les collisions hadroniques à haute énergie, en vue d’applications à la phénoménologie des collisions proton-noyau et noyau-noyau dans les collisionneurs de hadrons (RHIC, LHC), où des effets nucléaires (shadowing, perte d’énergie partonique, élargissement de l’impulsion transverse) entrent en jeu. Dans une première partie, j’étudie l’élargissement de l’impulsion transverse d’un système de partons énergétiques traversant un noyau, en mettant l’accent sur la structure de couleur du processus. Un cadre théorique basé sur le formalisme des dipôles est utilisé, et une équation cinétique est dérivée pour la distribution en impulsion transverse de la paire de partons, en demandant que cette paire soit dans un état de couleur donné (représentation irréductible de SU (Nc)) à la fois dans l’état initial et dans l’état final. La structure de couleur est codée dans un opérateur d’évolution de couleur, qui est obtenu pour tout type de paire de partons. Pour une paire compacte de petite taille, la dérivation donne une interprétation physique claire du processus d’élargissement de l’impulsion transverse. Dans une deuxième partie, je discute la matrice de dimension anormale Q, qui est formellement analogue à l’opérateur d’évolution précédent, et qui apparaît lors de l’ étude du rayonnement de gluons mous associé à une diffusion partonique dure 2 −> 2. Il a été remarqué que la matrice Q associée à gg −> gg a une symétrie surprenante (reliant les degrés de liberté externe et interne). J’ai développé des outils pour dériver les matrices Q associées à des diffusions 2 −> 2 impliquant des partons généralisés, afin d’explorer si la symétrie observée pour gg −> gg est fortuite ou non
In the Standard Model of particle physics,the theory of the strong interaction, Quantum Chromodynamics (QCD), is a gauge theory of symmetry group SU (Nc) with respect to the color quantum number. QCD obeys the property of asymptotic freedom, allowing the computation of high-energy physical observables using perturbative QCD (pQCD). This thesis deals with the pQCD description of hadron production rates in high-energy hadronic collisions, in view of applications to the phenomenology of proton-nucleus and nucleus-nucleus collisions at hadron colliders (RHIC,LHC), where so-called nuclear effects (shadowing, parton energy loss, transverse momentum broadening) come into play. In a first part, I study the transverse broadening of an energetic parton system crossing a nucleus, putting emphasis on the color structure of the process. A theoretical setup based on the dipole formalism is used,and a kinetic equation is derived for the parton pair transverse momentum distribution, requiring the parton pair to be in a given color state (SU (Nc) irreducible representation) both in the initial and final state. The color structure is encoded in a color evolution operator, which is obtained for any type of parton pair. For a small-size compact pair, the derivation yields a transparent physical interpretation of the pair transverse broadening process. In a second part, I discuss the soft anomalous dimension matrix Q, which is formally analogous to the previous evolution operator, and which appears when studying soft gluon radiation associated to 2 −> 2 hard parton scattering. It has been noticed that the Q-matrix associated to gg −> gg has a surprising symmetry (relating external and internal degrees of freedom). I developed tools to derive the Q-matrices associated to2 −> 2 scatterings involving generalized partons, in order to explore if the symmetry observed for gg −> gg is fortuitous or not

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Molloy, James. « Argon and argon-chlorine plasma reactive ion etching and surface modification of transparent conductive tin oxide thin films for high resolution flat panel display electrode matrices ». Thesis, University of Ulster, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243741.

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Bryjko, Lilianna. « SA-CASSCF and R-matrix calculations of low-energy electron collisions with DNA bases and phosphoric acid ». Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2608.

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The research presented in this thesis was carried out as part of a collaboration between the groups of Dr Tanja van Mourik at the School of Chemistry, University of St Andrews and Professor Jonathan Tennyson at the Department of Physics and Astronomy at University College London. This thesis presents State-Averaged Complete Active Space Self Consistent Field (SA-CASSCF) calculations on nucleic acid bases, deoxyribose and phosphoric acid H₃PO₄). In the case of uracil, for comparison, Multireference Configuration Interaction calculations were also performed. The SA-CASSCF orbitals were subsequently used in R-matrix electron scattering calculations using the close-coupling model. Of major importance for obtaining accurate SA-CASSCF results is the choice of the active space and the number of calculated states. Properties such as the electronic energy, number of configurations, excitation energy and dipole moment were considered in the choice of active space. Electron-collision calculations were performed on two of the most stable isomers of phosphoric acid, a weakly dipolar form with all OH groups pointing up and a strongly dipolar form where one OH group points down. A broad shape resonance at about 7 eV was found for both isomers. Ten-state close-coupling calculations suggest the presence of narrow, Feshbach resonances in a similar energy region. Elastic and electronically inelastic cross sections were calculated for both isomers. The R-matrix calculations on uracil were done by the group from UCL. R-matrix calculations are currently being done on guanine. Scattering calculations on the other DNA bases will be performed in the near future.

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Alam, Ahmad Mahbubul. « Energy efficiency-spectral efficiency tradeoff in interference-limited wireless networks ». Thesis, Rennes, INSA, 2017. http://www.theses.fr/2017ISAR0028/document.

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L'une des stratégies utilisée pour augmenter l'efficacité spectrale (ES) des réseaux cellulaires est de réutiliser la bande de fréquences sur des zones relativement petites. Le problème majeur dans ce cas est un plus grand niveau d'interférence, diminuant l'efficacité énergétique (EE). En plus d'une plus grande largeur de bande, la densification des réseaux (cellules de petite taille ou multi-utilisateur à entrées multiples et sortie unique, MU-EMSO), peut augmenter l'efficacité spectrale par unité de surface (ESuS). La consommation totale d'énergie des réseaux sans fil augmente en raison de la grande quantité de puissance de circuit consommée par les structures de réseau denses, réduisant l'EE. Dans cette thèse, la région EE-SE est caractérisé dans un réseau cellulaire hexagonal en considérant plusieurs facteurs de réutilisation de fréquences (FRF), ainsi que l'effet de masquage. La région EE-ESuS est étudiée avec des processus de Poisson ponctuels (PPP) pour modéliser un réseau MU-EMSO avec un précodeur à rapport signal sur fuite plus bruit (RSFB). Différentes densités de station de base (SB) et nombre d'antennes aux SB avec une consommation d'énergie statique sont considérées.Nous caractérisons d'abord la région EE-SE dans le réseau cellulaire hexagonal pour différentes FRF, avec et sans masquage. Avec le masquage en plus de la perte de propagation, la mesure de coupure ε-EE-ES est proposée pour évaluer les performances. Les courbes EE-ES présentent une grande partie linéaire, due à la consommation de puissance statique, suivie d'une forte diminution de l'EE, puisque le réseau est homogène et limité par les interférences. Les résultats montrent qu'un FRF de 1 pour les régions proches de la SB et des FRF plus élevés dans la région plus proche du bord de la cellule améliorent le point optimal du EE-ES. De plus, un meilleur compromis EE-ES peut être obtenu avec une valeur plus élevée de coupure. En outre, un FRF de 1 est le meilleur choix pour une valeur élevée de coupure en raison d'une réduction du rapport signal sur interférence plus bruit (RSIB).Les précodeurs sont utilisés en liaison descendante des réseaux cellulaires MU-EMSO à accès multiple par division spatiale (AMDS) pour améliorer le RSIB. La géométrie stochastique a été utilisée intensivement pour analyser de tels systèmes complexes. Nous obtenons une expression analytique de l'ESuS en régime asymptotique, c.-à-d. nombre d'antennes et d'utilisateurs infinis, en utilisant des résultats de matrices aléatoires et de géométrie stochastique. Les SBs et les utilisateurs sont modélisés par deux PPP indépendants et le précodage RSFB est utilisé. L'EE est dérivée d'un modèle de consommation de puissance linéaire. Les simulations de Monte Carlo montrent que les expressions analytiques sont précises même pour un nombre faible d'antennes et d'utilisateurs. De plus, les courbes d'EE-ESuS ont une grande partie linéaire avant une forte décroissante de l'EE, comme pour les réseaux hexagonaux. Les résultats montrent également que le précodeur RSFB offre de meilleurs performances que le précodeur forçage à zéro (FZ), qui est typiquement utilisé dans la literature. Les résultats numériques pour le précodeur RSFB montrent que déployer plus de SBs ou d'antennes aux BSs augmente l'ESuS, mais que le gain dépend du rapport des densités SB-utilisateurs et du nombre d'antennes lorsque la densité de l'utilisateur est fixe. L'EE augmente seulement lorsque l'augmentation de l'ESuS est plus importante que l'augmentation de la consommation d'énergie par unité de surface. D'autre part, lorsque la densité d'utilisateur augmente, l'ESuS dans la région limitée par les interférences peut être améliorée en déployant davantage de SB sans sacrifier l'EE et le débit ergodique des utilisateurs
One of the used strategies to increase the spectral efficiency (SE) of cellular network is to reuse the frequency bandwidth over relatively small areas. The major issue in this case is higher interference, decreasing the energy efficiency (EE). In addition to the higher bandwidth, densification of the networks (e.g. small cells or multi-user multiple input single output, MU-MISO) potentially increases the area spectral efficiency (ASE). The total energy consumption of the wireless networks increases due to the large amount of circuit power consumed by the dense network structures, leading to the decrease of EE. In this thesis, the EE-SE achievable region is characterized in a hexagonal cellular network considering several frequency reuse factors (FRF), as well as shadowing. The EE-ASE region is also studied using Poisson point processes (PPP) to model the MU-MISO network with signal-to-leakage-and-noise ratio (SLNR) precoder. Different base station (BS) densities and different number of BS antennas with static power consumption are considered.The EE-SE region in a hexagonal cellular network for different FRF, both with and without shadowing is first characterized. When shadowing is considered in addition to the path loss, the ε-SE-EE tradeoff is proposed as an outage measure for performance evaluation. The EE-SE curves have a large linear part, due to the static power consumption, followed by a sharp decreasing EE, since the network is homogeneous and interference-limited. The results show that FRF of 1 for regions close to BS and higher FRF for regions closer to the cell edge improve the EE-SE optimal point. Moreover, better EE-SE tradeoff can be achieved with higher outage values. Besides, FRF of 1 is the best choice for very high outage value due to the significant signal-to-interference-plus-noise ratio (SINR) decrease.In downlink, precoders are used in space division multiple access (SDMA) MU-MISO cellular networks to improve the SINR. Stochastic geometry has been intensively used to analyse such a complex system. A closed-form expression for ASE in asymptotic regime, i.e. number of antennas and number of users grow to infinity, has been derived using random matrix theory and stochastic geometry. BSs and users are modeled by two independent PPP and SLNR precoder is used at BS. EE is then derived from a linear power consumption model. Monte Carlo simulations show that the analytical expressions are tight even for moderate number of antennas and users. Moreover, the EE-ASE curves have a large linear part before a sharply decreasing EE, as observed for hexagonal network. The results also show that SLNR outperforms the zero-foring (ZF) precoder, which is typically used in literature. Numerical results for SLNR show that deploying more BS or a large number of BS antennas increase ASE, but the gain depends on the BS-user density ratio and on the number of antennas when user density is fixed. EE increases only when the increase in ASE dominates the increase of the power consumption per unit area. On the other hand, when the user density increases, ASE in interference-limited region can be improved by deploying more BS without sacrificing EE and the ergodic rate of the users

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Livres sur le sujet "ENERGY MATRICES"

Random matrices. 3^e éd. Amsterdam : Elsevier/Academic Press, 2004.

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Random matrices. 2^e éd. Boston : Academic Press, 1991.

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A, Walker, dir. Energy methods in structural mechanics : A comprehensive introduction to matrix and finite element methods of analysis. London : Thomas Telford, 1999.

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Mehta, M. L. Random Matrices and the Statistical Theory of Energy Levels. Elsevier Science & Technology Books, 2014.

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(Editor), Édouard Brezin, Vladimir Kazakov (Editor), Didina Serban (Editor), Paul Wiegmann (Editor) et Anton Zabrodin (Editor), dir. Applications of Random Matrices in Physics (NATO Science Series II : Mathematics, Physics and Chemistry). Springer, 2006.

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(Editor), Edouard Brezin, Vladimir Kazakov (Editor), Didina Serban (Editor), Paul Wiegmann (Editor) et Anton Zabrodin (Editor), dir. Applications of Random Matrices in Physics (NATO Science Series II : Mathematics, Physics and Chemistry). Springer, 2006.

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Muller, Sebastian, et Martin Sieber. Resonance scattering of waves in chaotic systems. Sous la direction de Gernot Akemann, Jinho Baik et Philippe Di Francesco. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780198744191.013.34.

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This article discusses some applications of random matrix theory (RMT) to quantum or wave chaotic resonance scattering. It first provides an overview of selected topics on universal statistics of resonances and scattering observables, with emphasis on theoretical results obtained via non-perturbative methods starting from the mid-1990s. It then considers the statistical properties of scattering observables at a given fixed value of the scattering energy, taking into account the maximum entropy approach as well as quantum transport and the Selberg integral. It also examines the correlation properties of the S-matrix at different values of energy and concludes by describing other characteristics and applications of RMT to resonance scattering of waves in chaotic systems, including those relating to time delays, quantum maps and sub-unitary random matrices, and microwave cavities at finite absorption.

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Olshanski, Grigori. Enumeration of maps. Sous la direction de Gernot Akemann, Jinho Baik et Philippe Di Francesco. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780198744191.013.26.

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This article discusses the relationship between random matrices and maps, i.e. graphs drawn on surfaces, with particular emphasis on the one-matrix model and how it can be used to solve a map enumeration problem. It first provides an overview of maps and related objects, recalling the basic definitions related to graphs and defining maps as graphs embedded into surfaces before considering a coding of maps by pairs of permutations. It then examines the connection between matrix integrals and maps, focusing on the Hermitian one-matrix model with a polynomial potential and how the formal expansion of its free energy around a Gaussian point (quadratic potential) can be represented by diagrams identifiable with maps. The article also illustrates how the solution of the map enumeration problem can be deduced by means of random matrix theory (RMT). Finally, it explains how the matrix model result can be translated into a bijective proof.

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Mencinger, Matej. Simetrijske grupe končnih vzorcev. University of Maribor Press, 2021. http://dx.doi.org/10.18690/978-961-286-536-8.

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Končni vzorci so najprej definirani intuitivno, kasneje pa še eksaktno (matematično). Simetrije končnih vzorcev so definirane s pomočjo izometrij ravnine. Obravnavani so štirje osnovni razredi izometrij ravnine: zrcaljenje, rotacija, translacija ter drsno zrcaljenje. V klasifikacijskem izreku je dokazano, da vsaka izometrija spada v enega od osnovnih štirih razredov. Pri obravnavi vektorjev in matrik se omejimo na ravnino in trirazsežni vektorski prostor. Dokazano je, da izometrijam ravnine s fiksno točko pripadajo natanko ortogonalne matrike. V poglavju o grupah so obravnavani pojmi: (pod)grupa, red grupe, izomorfizem grup ter generatorji grupe. Glavni rezultat je klasifikacija simetrijskih grup končnih vzorcev v ciklične ali diedrske, kar danes imenujemo Leonardov izrek. Podano je tudi nekaj informacij o zgodovinski dobi, v kateri je deloval Leonardo da Vinci in nekaterih povezavah med njegovim delom in matematiko. Učbenik je namenjen študentom arhitekture in vsebuje številne primere, rešene naloge ter obsežno slikovno gradivo.

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Perrone Campos Mello, Patricia, et Juan Jorge Faunes Peñafiel. Constitucionalismo em rede : o direito à identidade cultural dos povos indígenas como filtro hermenêutico para tutela da tradicionalidade da ocupação da terra. Centro de Pesquisa e Extensâo em Direito Socioambiental, 2022. http://dx.doi.org/10.32457/12728/1015020208.

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A Constituição da República Federativa do Brasil de 1988 (Constituição de 1988 ou CF) assegurou aos índios os direitos sobre as terras que tradicionalmente ocupam e determinou à União o dever de demarcá-las, protegê-las e de fazer respeitar todos os seus bens (art. 231). Previu, ainda, que a demarcação das referidas terras deveria ser concluída no prazo de cinco anos, a contar da promulgação da CF (art. 67, ADCT). Entretanto, passados mais de trinta anos, tal demarcação está, ainda, longe de ser concluída. De fato, o reconhecimento do direito dos povos indígenas às suas terras encontra resistências e dificuldades de todas as ordens. São exemplos delas: os interesses de expansão de atividades econômicas sobre as áreas de tais comunidades (como o agronegócio, a mineração, a exploração de novas matrizes energéticas e da biodiversidade); a necessidade de ampliação da infraestrutura no interior do país (com a abertura de novas estradas e a passagem de redes de energia elétrica); a preocupação com aspectos de segurança nacional, sobretudo quanto aos povos indígenas que se encontram em faixa de fronteira, em que se teme o ingresso clandestino de estrangeiros por suas áreas; a apreensão quanto à manipulação de tais comunidades por interesses estrangeiros, para apropriação ilegítima de recursos naturais estratégicos que se encontram em suas terras; o ímpeto de expansão da cultura dominante e a incompreensão quanto à sua cultura; o desinteresse por suas vidas, a ignorância.

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Chapitres de livres sur le sujet "ENERGY MATRICES"

Bader, R. F. W., et K. B. Wiberg. « A Bond Energy from Quantum Mechanics ». Dans Density Matrices and Density Functionals, 677–92. Dordrecht : Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3855-7_37.

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Buzatu, Doru L., Paula Ianasi et Mihai V. Putz. « Quantum Metrological Matrices for Sustainable Graphentronics ». Dans Springer Proceedings in Energy, 315–26. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-55757-7_22.

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Vosko, S. H., et Jolanta B. Lagowski. « Understanding Energy Differences in Density Functional Theory ». Dans Density Matrices and Density Functionals, 391–441. Dordrecht : Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3855-7_21.

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Božin, V., et M. Mateljević. « Energy of Graphs and Orthogonal Matrices ». Dans Approximation and Computation, 87–96. New York, NY : Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-6594-3_6.

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Tiwari, G. N., et Lovedeep Sahota. « Energy Matrices of Solar-Distillation Systems ». Dans Advanced Solar-Distillation Systems, 319–45. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4672-8_8.

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Kryachko, Eugene S., et Eduardo V. Ludeña. « Many-Electron Wavefunctions, Density Matrices, Reduced Density Matrices and Variational Principles ». Dans Energy Density Functional Theory of Many-Electron Systems, 15–80. Dordrecht : Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-1970-9_2.

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Tiwari, Gopal Nath. « Thermal Energy and Exergy Matrices of Solar Energy Systems ». Dans Fundamental of Mathematical Tools for Thermal Modeling of Solar Thermal and Photo-voltaic Systems-Part-I, 545–601. Singapore : Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-7085-8_9.

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Levy, Mel. « Correlation Energy Functionals of One-Matrices and Hartree-Fock Densities ». Dans Density Matrices and Density Functionals, 479–98. Dordrecht : Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3855-7_25.

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Karim, Ansaf V., Swatantra Pratap Singh et Amritanshu Shriwastav. « Measurement and Removal of Endosulfan from Contaminated Environmental Matrices ». Dans Energy, Environment, and Sustainability, 145–64. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-7332-8_7.

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Mahajan, Neelu. « Texture Zeros of the Lepton Mass Matrices ». Dans XXII DAE High Energy Physics Symposium, 817–19. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73171-1_198.

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Actes de conférences sur le sujet "ENERGY MATRICES"

Min Liu et Felix F. Wu. « Correlation matrices estimation in energy portfolio optimization ». Dans Energy Society General Meeting. IEEE, 2008. http://dx.doi.org/10.1109/pes.2008.4596170.

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Dev, S., Sanjeev Kumar, Surender Verma, Shivani Gupta et Aalok Misra. « Degeneracies of Neutrino Mass Matrices with two Texture Zeros ». Dans THEORETICAL HIGH ENERGY PHYSICS : International Workshop on Theoretical High Energy Physics. AIP, 2007. http://dx.doi.org/10.1063/1.2803815.

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Corr, Jamie, Keith Thompson, Stephan Weiss, John G. McWhirter et Ian K. Proudler. « Maximum energy sequential matrix diagonalisation for parahermitian matrices ». Dans 2014 48th Asilomar Conference on Signals, Systems and Computers. IEEE, 2014. http://dx.doi.org/10.1109/acssc.2014.7094487.

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Weimann, Jacob, Matthew Schmidt, Arthur Bergles et Marc Compere. « Representing the Water-Energy Nexus With Decision Matrices ». Dans ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36918.

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The global water nexus is still in the formative stages as a area of study. The needs are mostly clear: people need adequate water for drinking, for growing food, for cooling steam-based power plants, and for sustaining the natural habitats that keep the carbon and hydrologic cycles functioning properly. What has emerged is a growing awareness of how finite the earth’s water resources are and how this creates a complex set of interconnected challenges in both developed and developing nations. What has also emerged are predictions with increasing urgency for water and energy crises in the next 20–50 years, especially if these concerns are left unaddressed. The Water-Nexus is not new, but its emerging importance now is driven primarily by population growth, climate change, and our growing awareness of societal impact on ecosystems. Providing energy for buildings, homes, and transportation is an increasingly difficult task for the growing population and aging infrastructure. Most individual issues within the Water-Energy Nexus are fairly well known with quantifiable water impacts. What is lacking is a clear representation of the Nexus relationships that show how changes in one sector impact another. What is needed is a compact way to represent the interrelationships that provide both insight and perspective on how much influence one proposed change has compared to another. Such an understanding should surface the most strategic, viable methods for simultaneously meeting water and energy needs while being a good steward of finances and natural resources. We propose the use of decision matrices from engineering design to represent the interconnected relationships that form the Water-Energy Nexus. The customers in this case are water-centric stakeholders such as government and corporate decision makers, educators, and water-oriented development agencies. Both quantitative and qualitative research methods are used to integrate the nexus topics into the decision matrix. Both positive and negative correlations in water impacts are indicated with their relative level of influence. Common units are used when possible to quantify water consumption or savings. Decision matrices are presented for transportation fuels and utility power generation. The transportation fuels matrix includes evaluation criteria for water impact, sustainability, convenience, emissions, public opinion, and geographic considerations. The utility power decision matrix has similar evaluation criteria except capacity factor is considered instead of convenience. These criteria are intended to aid policy makers in strategically navigating the legislative and policy generation process to emphasize or reduce emphasis on different fuel types. Recommendations are provided for strategic, viable methods to mitigate future effects of the Water-Energy crisis.

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Grimus, Walter. « Neutrino mass matrices, texture zeros, and family symmetries ». Dans International Europhysics Conference on High Energy Physics. Trieste, Italy : Sissa Medialab, 2007. http://dx.doi.org/10.22323/1.021.0186.

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Thiru Senthil, R. « Invertor - Program to compute exact inversion of large matrices ». Dans 41st International Conference on High Energy physics. Trieste, Italy : Sissa Medialab, 2022. http://dx.doi.org/10.22323/1.414.1129.

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Datta, Priyanka, et Rajesh Rohilla. « Optimization and Performance matrices in 5G Networks ». Dans 2019 2nd International Conference on Power Energy, Environment and Intelligent Control (PEEIC). IEEE, 2019. http://dx.doi.org/10.1109/peeic47157.2019.8976723.

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Weaver, Bradley, Brian Landi et Ryne Raffaelle. « High Radiation Tolerance of Carbon Nanotube Matrices for Space Power Applications ». Dans 2nd International Energy Conversion Engineering Conference. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-5530.

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Pudari, Mahesh, Sabha Raj Arya et Papia Ray. « Parameter Estimation of IFOC-IMD using DEKF with Optimized Covariance Matrices ». Dans 2023 5th International Conference on Energy, Power and Environment : Towards Flexible Green Energy Technologies (ICEPE). IEEE, 2023. http://dx.doi.org/10.1109/icepe57949.2023.10201551.

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Blyumin, Semen, et Svetlana Tkachenko. « Accounting of Loops in Matrices of Graphs ». Dans 2019 1st International Conference on Control Systems, Mathematical Modelling, Automation and Energy Efficiency (SUMMA). IEEE, 2019. http://dx.doi.org/10.1109/summa48161.2019.8947591.

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Rapports d'organisations sur le sujet "ENERGY MATRICES"

Douglas, D. Interpolation of off-energy matrices : Symplectic and otherwise (A comparison of methods). Office of Scientific and Technical Information (OSTI), janvier 1985. http://dx.doi.org/10.2172/6813184.

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Walmsley, Terrie, Angel Aguiar et Badri Narayanan. Introduction to the Global Trade Analysis Project and the GTAP Data Base. GTAP Working Paper, mai 2012. http://dx.doi.org/10.21642/gtap.wp67.

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The Global Trade Analysis Project (GTAP) is a global network of researchers and policy makers conducting quantitative analysis of international policy issues. The motivation and ultimate success of the Project stems from the fact that collaboration is essential for detailed analysis of the global economy. The importance of collaboration to improve the quality of policy analysis world-wide is most clearly seen in the development of the GTAP Data Base. The GTAP Data Base is the centerpiece of the Global Trade Analysis Project. It records the annual flows of goods and services for the entire world economy in the benchmark year(s). It consists of bilateral trade, transport, and protection matrices that link individual country/regional economic data bases. The production of the GTAP Data Base relies on the valuable contributions of many individuals and organizations throughout the world. Individuals contribute the best available input-output table for their country, while other experts contribute the macro, trade, protection and other data required. The Center for Global Trade Analysis, the home of GTAP, then brings these contributions together into one useable, globally consistent, database. The result is a fully documented , publicly available and regularly updated global database. This year (2012), the eighth version of the GTAP Data Base was released, covering 129 countries, 57 sectors, 5 factors and two base years (2004 and 2007). The GTAP Data Base is utilized in a suite of comparative static and dynamic computable general equilibrium models and underlies most contemporary economic analysis of global policy issues related to trade, energy and the environment.

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Pérez Urdialez, Maria, Ariel Yépez, Mauricio Tolmasquim, Claudio Alatorre, Alejandro Rasteletti, Marco Stampini et Michelle Hallack. El papel de la transición energética en la recuperación sostenible de América Latina y el Caribe. Inter-American Development Bank, avril 2021. http://dx.doi.org/10.18235/0003214.

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Muchos países de América Latina y el Caribe (ALC) y del mundo se encuentran actualmente desarrollando ambiciosos planes para la reactivación económica y la generación de empleo en el período pospandemia. Estos planes representan una oportunidad única para la inclusión de medidas que, al mismo tiempo que reactivan la economía, también apoyan la transición energética de los países de la región. Esta nota técnica busca apoyar a los países de la región en el diseño de planes de recuperación sostenibles, presentando consideraciones que deben ser tomadas en cuenta para el diseño e implementación exitosa de estos planes. Los países de ALC presentan importantes ventajas comparativas para la transición hacia matrices más sostenibles. Particularmente, se destacan la gran cantidad de recursos naturales para la producción de biomasa, energía eólica y solar. Adicionalmente, las subastas para la adjudicación de nueva capacidad energética son habituales en la regionales y tanto desarrolladores internacionales de energías renovables como prestamistas internacionales presentan interés en el financiamiento de dichas inversiones. Es por ello que los países latinoamericanos y del Caribe tienen una oportunidad única para llevar adelante una transición energética sostenible que además incremente los recursos disponibles para dicho fin. Las inversiones sostenibles para fomentar la transición energética deben ser acompañadas de medidas que amplíen el espacio fiscal de los gobiernos, para no comprometer su sostenibilidad. Para alcanzar esto, la presente nota propone discutir los temas asociados a la introducción de mecanismos que permiten impulsar la transición abriendo espacios fiscales, como mecanismos de fijación de precios de carbono, como los impuestos al carbono o los permisos negociables de emisión de carbono. Adicionalmente, se propone la posibilidad de reducir los subsidios a energéticos con grande emisiones o aumentar la eficiencia de los instrumentos con diseños más focalizados, aprovechando el contexto de bajos precios internacionales de la energía.

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Kinikles, Dellena, et John McCartney. Hyperbolic Hydro-mechanical Model for Seismic Compression Prediction of Unsaturated Soils in the Funicular Regime. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, décembre 2022. http://dx.doi.org/10.55461/yunw7668.

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A semi-empirical elasto-plastic constitutive model with a hyperbolic stress-strain curve was developed with the goal of predicting the seismic compression of unsaturated sands in the funicular regime of the soil-water retention curve (SWRC) during undrained cyclic shearing. Using a flow rule derived from energy considerations, the evolution in plastic volumetric strain (seismic compression) was predicted from the plastic shear strains of the hysteretic hyperbolic stress-strain curve. The plastic volumetric strains are used to predict the changes in degree of saturation from phase relationships and changes in pore air pressure from Boyle’s and Henry’s laws. The degree of saturation was used to estimate changes in matric suction from the transient scanning paths of the SWRC. Changes in small-strain shear modulus estimated from changes in mean effective stress computed from the constant total stress and changes in pore air pressure, degree of saturation and matric suction, in turn affect the hyperbolic stress-strain curve’s shape and the evolution in plastic volumetric strain. The model was calibrated using experimental shear stress-strain backbone curves from drained cyclic simple shear tests and transient SWRC scanning path measurements from undrained cyclic simple shear tests. Then the model predictions were validated using experimental data from undrained cyclic simple shear tests on unsaturated sand specimens with different initial degrees of saturation in the funicular regime. While the model captured the coupled evolution in hydro-mechanical variables (pore air pressure, pore water pressure, matric suction, degree of saturation, volumetric strain, effective stress, shear modulus) well over the first 15 cycles of shearing, the predictions were less accurate after continued cyclic shearing up to 200 cycles. After large numbers of cycles of undrained shearing, a linear decreasing trend between seismic compression and initial degree of saturation was predicted from the model while a nonlinear increasing-decreasing trend was observed in the cyclic simple shear experiments. This discrepancy may be due to not considering post shearing reconsolidation in the model, calibration of model parameters, or experimental issues including a drift in the position of the hysteretic shear-stress strain curve. Nonetheless, the trend from the model is consistent with predictions from previously- developed empirical models in the funicular regime of the SWRC. The developments of the new mechanistic model developed in this study will play a key role in the future development of a holistic model for predicting the seismic compression across all regimes of the SWRC.

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Friedman, Shmuel, Jon Wraith et Dani Or. Geometrical Considerations and Interfacial Processes Affecting Electromagnetic Measurement of Soil Water Content by TDR and Remote Sensing Methods. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7580679.bard.

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Time Domain Reflectometry (TDR) and other in-situ and remote sensing dielectric methods for determining the soil water content had become standard in both research and practice in the last two decades. Limitations of existing dielectric methods in some soils, and introduction of new agricultural measurement devices or approaches based on soil dielectric properties mandate improved understanding of the relationship between the measured effective permittivity (dielectric constant) and the soil water content. Mounting evidence indicates that consideration must be given not only to the volume fractions of soil constituents, as most mixing models assume, but also to soil attributes and ambient temperature in order to reduce errors in interpreting measured effective permittivities. The major objective of the present research project was to investigate the effects of the soil geometrical attributes and interfacial processes (bound water) on the effective permittivity of the soil, and to develop a theoretical frame for improved, soil-specific effective permittivity- water content calibration curves, which are based on easily attainable soil properties. After initializing the experimental investigation of the effective permittivity - water content relationship, we realized that the first step for water content determination by the Time Domain Reflectometry (TDR) method, namely, the TDR measurement of the soil effective permittivity still requires standardization and improvement, and we also made more efforts than originally planned towards this objective. The findings of the BARD project, related to these two consequential steps involved in TDR measurement of the soil water content, are expected to improve the accuracy of soil water content determination by existing in-situ and remote sensing dielectric methods and to help evaluate new water content sensors based on soil electrical properties. A more precise water content determination is expected to result in reduced irrigation levels, a matter which is beneficial first to American and Israeli farmers, and also to hydrologists and environmentalists dealing with production and assessment of contamination hazards of this progressively more precious natural resource. The improved understanding of the way the soil geometrical attributes affect its effective permittivity is expected to contribute to our understanding and predicting capability of other, related soil transport properties such as electrical and thermal conductivity, and diffusion coefficients of solutes and gas molecules. In addition, to the originally planned research activities we also investigated other related problems and made many contributions of short and longer terms benefits. These efforts include: Developing a method and a special TDR probe for using TDR systems to determine also the soil's matric potential; Developing a methodology for utilizing the thermodielectric effect, namely, the variation of the soil's effective permittivity with temperature, to evaluate its specific surface area; Developing a simple method for characterizing particle shape by measuring the repose angle of a granular material avalanching in water; Measurements and characterization of the pore scale, saturation degree - dependent anisotropy factor for electrical and hydraulic conductivities; Studying the dielectric properties of cereal grains towards improved determination of their water content. A reliable evaluation of the soil textural attributes (e.g. the specific surface area mentioned above) and its water content is essential for intensive irrigation and fertilization processes and within extensive precision agriculture management. The findings of the present research project are expected to improve the determination of cereal grain water content by on-line dielectric methods. A precise evaluation of grain water content is essential for pricing and evaluation of drying-before-storage requirements, issues involving energy savings and commercial aspects of major economic importance to the American agriculture. The results and methodologies developed within the above mentioned side studies are expected to be beneficial to also other industrial and environmental practices requiring the water content determination and characterization of granular materials.

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