Relevant bibliographies by topics / Planar models

Academic literature on the topic 'Planar models'

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Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Planar models"

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Repetowicz, Przemysław, Uwe Grimm, and Michael Schreiber. "Planar quasiperiodic Ising models." Materials Science and Engineering: A 294-296 (December 2000): 638–41. http://dx.doi.org/10.1016/s0921-5093(00)01153-9.

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Ivanov, Evgeny, Luca Mezincescu, and Paul K. Townsend. "Planar super-Landau models." Journal of High Energy Physics 2006, no. 01 (January 26, 2006): 143. http://dx.doi.org/10.1088/1126-6708/2006/01/143.

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Curtright, Thomas, Luca Mezincescu, Evgeny Ivanov, and Paul K. Townsend. "Planar super-Landau models revisited." Journal of High Energy Physics 2007, no. 04 (April 3, 2007): 020. http://dx.doi.org/10.1088/1126-6708/2007/04/020.

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Yousaf, Z., and M. Zaeem-ul-Haq Bhatti. "Some anisotropic planar stellar models." International Journal of Geometric Methods in Modern Physics 15, no. 09 (August 8, 2018): 1850160. http://dx.doi.org/10.1142/s0219887818501608.

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The aim of this paper is to investigate the influence of expansion-free condition and cosmological constant in the modeling of planar relativistic self-gravitating objects. For this purpose, we have considered a non-static diagonally oriented planar geometry that is coupled with locally anisotropic non-radiating matter configurations. Firstly, we have explored the factor responsible for maintaining conformal flat state by relating tidal forces with matter dynamical variables. Then, we have smoothly joined our relativistic interior with the exterior one through Darmois junction conditions in the [Formula: see text]-dominated epoch. We have also shown that the well-known perfect fluid Skripkin model has disobeyed matching conditions for the case of planar system with cosmological constant. Lastly, we have inspected family of exact analytical solutions of Einstein-[Formula: see text] field equations with various backgrounds, like, an/isotropic matter, separable energy density and barotropic equation of state.
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Drezner, Tammy, and Zvi Drezner. "Equity Models in Planar Location." Computational Management Science 4, no. 1 (June 13, 2006): 1–16. http://dx.doi.org/10.1007/s10287-006-0021-0.

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Arcioni, Paolo, Giuseppe Conciauro, and Matteo Repossi. "Planar Models of Reconfigurable MEMS Circuits." IEEE Transactions on Microwave Theory and Techniques 55, no. 4 (April 2007): 722–28. http://dx.doi.org/10.1109/tmtt.2007.893674.

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Chernyak, Vladimir Y., and Michael Chertkov. "Planar graphical models which are easy." Journal of Statistical Mechanics: Theory and Experiment 2010, no. 11 (November 2, 2010): P11007. http://dx.doi.org/10.1088/1742-5468/2010/11/p11007.

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Canali, C. M., G. M. Cicuta, L. Molinari, and E. Montaldi. "The quantum mechanical planar propagator: From vector models to planar graphs." Nuclear Physics B 265, no. 3 (March 1986): 485–505. http://dx.doi.org/10.1016/0550-3213(86)90170-7.

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Ostoja-Starzewski, Martin. "Lattice models in micromechanics." Applied Mechanics Reviews 55, no. 1 (January 1, 2002): 35–60. http://dx.doi.org/10.1115/1.1432990.

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This review presents the potential that lattice (or spring network) models hold for micromechanics applications. The models have their origin in the atomistic representations of matter on one hand, and in the truss-type systems in engineering on the other. The paper evolves by first giving a rather detailed presentation of one-dimensional and planar lattice models for classical continua. This is followed by a section on applications in mechanics of composites and key computational aspects. We then return to planar lattice models made of beams, which are a discrete counterpart of non-classical continua. The final two sections of the paper are devoted to issues of connectivity and rigidity of networks, and lattices of disordered (rather than periodic) topology. Spring network models offer an attractive alternative to finite element analyses of planar systems ranging from metals, composites, ceramics and polymers to functionally graded and granular materials, whereby a fiber network model of paper is treated in considerable detail. This review article contains 81 references.
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Johnston, D. A. "Symmetric vertex models on planar random graphs." Physics Letters B 463, no. 1 (September 1999): 9–18. http://dx.doi.org/10.1016/s0370-2693(99)00948-x.

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Dissertations / Theses on the topic "Planar models"

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Venkateswaran, Ajay. "Analysis of planar EBG structures using transmission line models." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40812.

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The transmission line based analytical solutions have simplified engineering of complex microwave circuits like electromagnetic bandgap structures (EBGs). In this thesis, planar EBG structures are studied by derivation of lumped element and transmission line equivalent circuits followed by utilizing analytical formulations. Based on this approach, a code is developed that predicts the dispersion characteristics of these periodic structures in a matter of few seconds. Planar EBG structures containing meander sections are investigated and a method for development of an equivalent circuit for the meander line portion is presented. The analysis of the studied EBG structures begins from a simple 1D geometry and is extended to more complex 2D geometries. The analytical simulation results are evaluated against full-wave simulations. Inclusion of the meander sections reduces the beginning of the bandgap to below 1GHz resulting in a more attractive structure for low frequency omni-directional filtering.
Les solutions analytiques basées sur des lignes de transmission ont simplifié l'ingénierie de circuits micro-ondes complexes, tel que les EBG. La présente thèse étudie les structures coplanaires EBG à partir d'éléments discrets et de modèles de lignes de transmission, auxquels sont ensuite appliquées des formules analytiques. Grâce à cette approche, un logiciel a été développé permettant de prédire les caractéristiques de dispersion de ces structures périodiques en quelques secondes seulement. Les structures coplanaires EBG contenant des sections courbes sont étudiées et un modèle de circuit équivalent à la portion courbe est proposé. L'analyse des structures EBG commence par une simple géométrie 1D, puis est étendue à des géométries 2D plus complexes. Le résultat des simulations analytiques est évalué par rapport au résultat des simulations analogues. Lorsque les sections courbes sont incluses, le début de la bande interdite est porté en deçà de 1GHz, rendant la structure plus intéressante pour le filtrage basse fréquence omni- directionnel.
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Dods, Steven R. A. "A spectral theory for planar dielectric waveguides." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30690.

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The problem of electromagnetic wave propagation across the junction of two similar planar dielectric waveguides is analysed, within the Kirchhoff approximation, by expanding the field into transverse variations of all possible modes. It is proven that the expansion can represent any solution for any planar dielectric waveguide. The spectral function is introduced into the representation, and this helps resolve some of the theoretical problems in passing from the limit of closed waveguides to open waveguides. Using the spectral function and the Gel'fand-Levitan integral equation some new exact solutions to novel dielectric planar waveguides can be found. Examples of waveguiding by total internal reflection or by Bragg reflection (which are physically very different processes) can be generated by changing a single parameter in the formulation. Usually the representation for an open dielectric waveguide requires the matrix spectral function. However the Gel'fand-Levitan reconstruction is defined for scalar spectral functions. A technique for constructing the spectral matrix and the scattering solutions from two spectral functions is demonstrated. This technique uses a variational formulation of a scattering experiment. The connection between a dielectric structure and the characteristics of propagation on it is obscure. However the connection between these characteristics and the spectral function is much clearer. It is sometimes possible to make predictions about the properties of the waveguide by looking at its spectral function only. Since the connection between the spectral function and the dielectric structure is well established by inverse spectral theory, introducing the spectral function has been of help in establishing the desired connection between the dielectric structure and the characteristics of propagation on it. Such considerations suggest one of the above waveguides is sensitive to small perturbations and could be used as an electro-optic modulator. Detailed calculations confirm the hypothesis.
Applied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
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Lazaryan, Shushan, Nika LAzaryan, and Nika Lazaryan. "Discrete Nonlinear Planar Systems and Applications to Biological Population Models." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/4025.

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We study planar systems of difference equations and applications to biological models of species populations. Central to the analysis of this study is the idea of folding - the method of transforming systems of difference equations into higher order scalar difference equations. Two classes of second order equations are studied: quadratic fractional and exponential. We investigate the boundedness and persistence of solutions, the global stability of the positive fixed point and the occurrence of periodic solutions of the quadratic rational equations. These results are applied to a class of linear/rational systems that can be transformed into a quadratic fractional equation via folding. These results apply to systems with negative parameters, instances not commonly considered in previous studies. We also identify ranges of parameter values that provide sufficient conditions on existence of chaotic and multiple stable orbits of different periods for the planar system. We study a second order exponential difference equation with time varying parameters and obtain sufficient conditions for boundedness of solutions and global convergence to zero. For the autonomous case, we show occurrence of multistable periodic and nonperiodic orbits. For the case where parameters are periodic, we show that the nature of the solutions differs qualitatively depending on whether the period of the parameters is even or odd. The above results are applied to biological models of populations. We investigate a broad class of planar systems that arise in the study of stage-structured single species populations. In biological contexts, these results include conditions on extinction or survival of the species in some balanced form, and possible occurrence of complex and chaotic behavior. Special rational (Beverton-Holt) and exponential (Ricker) cases are considered to explore the role of inter-stage competition, restocking strategies, as well as seasonal fluctuations in the vital rates.
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Collet, Gwendal. "Enumeration and analysis of models of planar maps via the bijective method." Palaiseau, Ecole polytechnique, 2014. https://tel.archives-ouvertes.fr/tel-01084964/document.

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La combinatoire bijective est un domaine qui consiste à étudier les propriétés énumératives de familles d’objets mathématiques en exhibant des bijections (idéalement explicites) qui préservent ces propriétés entre de telles familles et des objets déjà connus. Cela permet alors d’appliquer tous les outils de la combinatoire analytique à ces nouveaux objets, afin d’en obtenir une énumération explicite, des propriétés asymptotiques, ou encore d’en faire la génération aléatoire. Dans cette thèse, nous nous intéresserons aux cartes planaires qui sont des graphes dessinés dans le plan sans croisement d’arêtes. Dans un premier temps, nous retrouverons une formule simple – établie par Eynard – pour la série génératrice des cartes biparties et cartes quasi-biparties avec des bords de longueurs définies, et nous en donnerons la généralisation naturelle aux p-constellations et quasi-p-constellations. Dans la seconde partie de cette thèse, nous présenterons une bijection originale pour les cartes simples – sans boucles, ni arêtes multiples – à face externe triangulaire et les triangulations eulériennes, nous permettant notamment de faire la génération aléatoire des cartes simples enracinées en contrôlant le nombre de sommets et d’arêtes. Grâce à cette bijection, nous étudierons également les propriétés métriques des cartes simples en démontrant la convergence du profil normalisé des distances vers une mesure aléatoire explicite liée au serpent brownien
Bijective combinatorics is a field which consists in studying the enumerative properties of some families of mathematical objects, by exhibiting bijections (ideally explicit) which preserve these properties between such families and already known objects. One can then apply any tool of analytic combinatorics to these new objets, in order to get explicit enumeration, asymptotics properties, or to perform random sampling. In this thesis, we will be interested in planar maps – graphs drawn on the plane with no crossing edges. First, we will recover a simple formula –obtained by Eynard – for the generating series of bipartite maps and quasi-bipartite maps with boundaries of prescribed lengths, and we will give anatural generalization to p-constellations and quasi-p-constellations. In the second part of this thesis, we will present an original bijection for outertriangular simple maps – with no loops nor multiple edges – and eulerian triangulations. We then use this bijection to design random samplers for rooted simple maps according to the number of vertices and edges. We will also study the metric properties of simple maps by proving the convergence of the rescaled distance-profile towards an explicit random measure related to the Brownian snake
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Sola, Alan. "Conformal Maps, Bergman Spaces, and Random Growth Models." Doctoral thesis, KTH, Matematik (Avd.), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12364.

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This thesis consists of an introduction and five research papers on topics related to conformal mapping, the Loewner equation and its applications, and Bergman-type spaces of holomorphic functions. The first two papers are devoted to the study of integral means of derivatives of conformal mappings. In Paper I, we present improved upper estimates of the universal means spectrum of conformal mappingsof the unit disk. These estimates rely on inequalities  obtained by Hedenmalm and Shimorin using Bergman space techniques, and on computer calculations. Paper II is a survey of recent results on the universal means spectrum, with particular emphasis on Bergman spacetechniques.Paper III concerns Bergman-type spaces of holomorphic functions in subsets of $\textbf{C}^d$ and their reproducing kernel functions. By expanding the norm of a function in a Bergman space along the zero variety of a polynomial, we obtain a series expansion of reproducing kernel functions in terms of kernels associated with lower-dimensionalspaces of holomorphic functions. We show how this general approach can be used to explicitly compute kernel functions for certain weighted Bergman and Bargmann-Fock spaces defined in domains in $\textbf{C}^2$.The last two papers contribute to the theory of Loewner chains and theirapplications in the analysis of planar random growth model defined in terms of compositions of conformal maps.In Paper IV, we study Loewner chains generated by unimodular L\'evy processes.We first establish the existence of a capacity scaling limit for the associated growing hulls in terms of whole-plane Loewner chains driven by a time-reversed process. We then analyze the properties of Loewner chains associated with a class of two-parameter compound Poisson processes, and we describe the dependence of the geometric properties of the hulls on the parameters of the driving process. In Paper V, we consider a variation of the Hastings-Levitov growth model, with anisotropic growth. We again establish results concerning scaling limits, when the number of compositions increases and the basic conformal mappings tends to the identity. We show that the resulting limit sets can be associated with solutions to the Loewner equation.We also prove that, in the limit, the evolution of harmonic measure on the boundary is deterministic and is determined by the flow associated with an ordinary differential equation, and we give a description of the fluctuations around this deterministic limit flow.

QC 20100414

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Al-Awfi, Saud A. Gh. "Spontaneous emission and atom dynamics in planar and cylindrical structures." Thesis, University of Essex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298835.

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Yatsunyk, Liliya. "Synthesis, structure, and magnetic spectroscopies of non-planar hemes as models of the cytochrome B heme centers." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280394.

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Models of the heme b centers in the cytochrome bc₁ complex based on octaalkyltetraphenyliron(III) porphyrins (OETPP, OMTPP, and TC₆TPP) with various axial ligands (4-Me₂NPy, 4-CNPy, 1-MeIm, 2-McImH, CN- and t-BuNC) have been synthesized and explored via NMR and EPR spectroscopy and X-ray crystallography. The electron spin distributions and the electronic ground states of the complexes were determined based on the NMR and EPR results. The type of ground state of Fe(III) is defined by the number and nature of the axial ligands and peripheral substituents. Five-coordinate complexes with Cl- are high-spin (HS, S = 5/2) with ∼10% of intermediate spin (IS, S = 3/2) mixed in. Bis-(4-CNPy) porphyrins at relatively high temperatures, as well as five-coordinate perchlorates, have the IS state. Finally, six-coordinate complexes with pyridines, imidazoles, cyanides and isocyanides are all low-spin (LS, S = 1/2), with the (dxy)²(d xz,dyz)³ ground state in the case of strongly and moderately basic axial ligands, and the (dxz,dyz)⁴(dxy)¹ ground state when bound to weak sigma-donors and/or strong pi-acceptors like t-BuNC or 4-CNPy (at low temperatures only). Crystal structures of more than 15 complexes have been obtained in order to establish structure-property relationships in the systems studied. All of them adopt a saddled conformation with different degrees of ruffling and non-planarity and a wide range of dihedral angles between the axial ligands. Non-planar distortion of the macrocycle induced by the steric interaction between the peripheral substituents increases in the order TC₆TPP < OMTPP < OETPP. The rate of ring inversion of the porphyrin cores decreases in the same order, as shown by NMR spectroscopy. While all bis-ligated iron(III) porphyrinate of this study with pyridine or hindered imidazole ligands have close to perpendicular axial ligand orientations, bis-(1-MeIm) complexes have perpendicular as well as close to parallel ligand arrangements both in crystals and in solutions as observed by EPR and Mössbauer spectroscopy and X-ray crystallography. Preliminary Mössbauer studies of four of the complexes of this study have been carried out in the laboratory of Professor A. X. Trautwein, Institute of Physics, University of Lubeck, Germany. The results of the work presented in this dissertation suggest that octaalkyltetraphenylporphyrinatoiron(III) complexes are promising models for the heme b centers in the cytochrome bc₁ complex.
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Espinosa, Diego Alejandro. "Moment-dependent pseudo-rigid-body models for beam deflection and stiffness kinematics and elasticity." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002943.

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Albert, Jacques. "Characterizations and design of planar optical waveguides and directional couplers by two-step K+ -Na+ ion-exchange in glass." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75759.

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Planar optical waveguides fabricated by K$ sp+$-Na$ sp+$ ion-exchange in soda-lime glass substrates are investigated.
Experimental characterizations of planar waveguide with respect to a wide range of fabrication conditions have been carried out, including detailed measurements of the refractive index anisotropy resulting from the large induced surface stresses.
Parallel to this, the non-linear diffusion process of ion-exchange was simulated numerically to provide, along with the results of the characterizations, a complete description of the refractive index profile from any set of fabrication conditions.
The magnitude of the maximum surface index change observed was shown theoretically to be almost entirely due to the induced stress at the surface of the substrate, arising from the presence of the larger potassium ions.
Finally, a novel class of single-mode channel waveguides, made by a "two-step" ion-exchange was analyzed. A simple model for these waveguides was developed and used in the design of two directional coupler structures which were fabricated and measured.
The two-step process was conceived because it relaxes waveguides' dimensional control, yielding single-mode guides of larger size, better suited for low-loss connections to optical fibers. It also provides an additional degree of freedom to adjust device properties.
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Besri, Abdelhadi. "Modélisation analytique et outils pour l'optimisation des transformateurs de puissance haute fréquence planars." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00612344.

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Avec un encombrement minimal et rendement de 99% les transformateurs planars haute fréquence sont des solutions technologiques importantes pour les systèmes de conversion et de conditionnement de l'énergie électrique en électronique de puissance. L'objectif de l'étude consiste à rechercher un modèle du composant permettant à la fois de simuler son comportement dans un circuit d'électronique de puissance et d'optimiser ses performances lors de sa conception. Les modèles proposés prennent en compte les propriétés physiques et géométriques du composant. Les validations sont basées sur des confrontations avec les mesures. Une autre motivation forte de ce travail est que les modélisations numériques doivent prendre en compte simultanément les effets des courants induits et les capacités parasites, ce qui conduit, en haute fréquence, à des besoins prohibitifs en termes de capacité mémoire ou de temps de calcul. En se limitant aux transformateurs planar. La modélisation (dite LEEC) présentée ici s'appuie sur une discrétisation à échelle intermédiaire : spire par spire, c'est-à-dire couche par couche. Elle assemble deux approches analytiques déjà introduites par l'équipe : la première traite les aspects électrocinétiques (incluant les courants induits) et magnétiques et l'autre les aspects électrostatiques. Les circuits à constantes localisées basés sur la méthode LEEC montrent un très bon accord avec toutes les mesures jusqu'à 40 MHz. Des outils numériques sont aussi développés pour faciliter l'obtention de ces différents circuits en partant : soit de la description du composant, soit de mesures d'impédances. Pour compléter, la représentation des capacités d'un transformateur quelconque, développée en plusieurs étapes par l'équipe, est résumée et des précautions expérimentales originales appliquées à l'impédancemétrie sont exposées dans le détail. D'autres travaux visant à élargir le champ d'application de la méthode LEEC sont également présentés.
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Books on the topic "Planar models"

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Helszajn, J. Green's function, finite elements, and microwave planar circuits. Chichester: J. Wiley, 1996.

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Rozzi, T. Advanced electromagnetic analysis of passive and active planar structures. London: Institution of Electrical Engineers, 1999.

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Petrila, T. Modele matematice in hidrodinamica plana. Bucuresti: Acad. RSR, 1987.

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Hans-Georg, Lippert, Köth Anke, Schwarting Andreas 1966-, Gollan Rut-Maria 1981-, DFG-Sonderforschungsbereich 804--"Transzendenz und Gemeinsinn.", and Tagung Agora & Void (2011 : Dresden, Germany), eds. Un/planbar. Dresden: Thelem, 2012.

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Burns, Rowland E. Forbidden tangential orbit transfers between intersecting Keplerian orbits. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Hogan, Patrick G. Surface construction from planar contours. Monterey, California: Naval Postgraduate School, 1986.

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Velasco, Luis de. La democracia plana: Debilidades del modelo político español. Madrid: Biblioteca Nueva, 1999.

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Peterson, Keith A. An experimental approach for studying creep behavior of model planar interfaces. Monterey, Calif: Naval Postgraduate School, 2000.

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Singh, Hema, R. Chandini, and Rakesh Mohan Jha. RCS Estimation of Linear and Planar Dipole Phased Arrays: Approximate Model. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-754-3.

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Modelirovanie plana gornykh rabot pri podzemnoĭ dobyche rud. Moskva: Akademii͡a︡ nauk SSSR, In-t problem kompleksnogo osvoenii͡a︡ nedr, 1988.

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Book chapters on the topic "Planar models"

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Bajaj, Chanderjit, and Myung-Soo Kim. "Algorithms for planar geometric models." In Automata, Languages and Programming, 67–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/3-540-19488-6_107.

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Buenaposada, José M., Enrique Muñoz, and Luis Baumela. "Tracking Heads Using Piecewise Planar Models." In Pattern Recognition and Image Analysis, 126–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-44871-6_15.

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Southard, David A. "Piecewise Planar Surface Models from Sampled Data." In Scientific Visualization of Physical Phenomena, 667–80. Tokyo: Springer Japan, 1991. http://dx.doi.org/10.1007/978-4-431-68159-5_37.

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Katz, Dov, and Oliver Brock. "Extracting Planar Kinematic Models Using Interactive Perception." In Lecture Notes in Electrical Engineering, 11–23. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-75523-6_2.

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Cortés-Antonio, Prometeo, Fevrier Valdez, Oscar Castillo, and Patricia Melin. "Towards Tracking Trajectory of Planar Quadrotor Models." In Intuitionistic and Type-2 Fuzzy Logic Enhancements in Neural and Optimization Algorithms: Theory and Applications, 313–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35445-9_24.

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Hahn, Hubert. "Planar models of an unconstrained rigid body." In Rigid Body Dynamics of Mechanisms, 31–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-09769-4_3.

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Jovanovic, D., J. P. Leburton, H. Chang, R. Grundbacher, and I. Adesida. "Disorder-Induced Resonant Tunneling in Planar Quantum Dot Nanostructures." In Physical Models for Quantum Dots, 31–52. New York: Jenny Stanford Publishing, 2021. http://dx.doi.org/10.1201/9781003148494-3.

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He, Zhongjie, Hua Li, and Karl Erik Birgersson. "Development of Reduced PEMFC Models." In Reduced Modelling of Planar Fuel Cells, 89–165. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42646-4_4.

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Karandashev, Iakov M. "Planar Ising-Spin Models in Probabilistic Machine Learning." In Advances in Neural Computation, Machine Learning, and Cognitive Research II, 14–38. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01328-8_2.

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Au-Yang, Helen, and Jacques H. H. Perk. "Wavevector-Dependent Susceptibility in Aperiodic Planar Ising Models." In MathPhys Odyssey 2001, 1–21. Boston, MA: Birkhäuser Boston, 2002. http://dx.doi.org/10.1007/978-1-4612-0087-1_1.

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Conference papers on the topic "Planar models"

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Bodo, G. "Vortices and waves in planar and disk flows." In MHD COUETTE FLOWS: Experiments and Models. AIP, 2004. http://dx.doi.org/10.1063/1.1832147.

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Poliannikov, Oleg V., and Hamid Krim. "Parameterization models for sampling planar curves." In Electronic Imaging 2002, edited by Edward R. Dougherty, Jaakko T. Astola, and Karen O. Egiazarian. SPIE, 2002. http://dx.doi.org/10.1117/12.467970.

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Tanaka, Masaru, Hiroyuki Shimai, Takio Kurita, and Takaomi Shigehara. "Multilevel autoregressive models for planar shape." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Andrew G. Tescher. SPIE, 1999. http://dx.doi.org/10.1117/12.365864.

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Golbert, Avram, David Arnon, and Aviv Sever. "Piecewise Planar and Non-Planar Segmentation of Large Complex 3D Urban Models." In 2014 2nd International Conference on 3D Vision (3DV). IEEE, 2014. http://dx.doi.org/10.1109/3dv.2014.88.

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Kotti, M., R. Gonzalez-Echevarria, E. Roca, R. Castro-Lopez, F. V. Fernandez, M. Fakhfakh, J. Sieiro, and J. M. Lopez-Villegas. "Surrogate models of Pareto-optimal planar inductors." In 2012 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD). IEEE, 2012. http://dx.doi.org/10.1109/smacd.2012.6339412.

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Burger, H. A. "Edge Corrections for Microstrip Planar Analysfs Models." In MTT-S International Microwave Symposium Digest. MTT005, 1987. http://dx.doi.org/10.1109/mwsym.1987.1132502.

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Mesa, Francisco, Raul Rodriguez-Berral, and Francisco Medina. "Circuit Models for Stacked Planar Periodic Structures." In 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA). IEEE, 2019. http://dx.doi.org/10.1109/iceaa.2019.8879240.

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Guttmann, Anthony J., and Iwan Jensen. "Exact Solution of Two Planar Polygon Models." In Proceedings of the 23rd International Conference of Differential Geometric Methods in Theoretical Physics. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772527_0016.

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Lusk, Craig P. "Quantifying Uncertainty for Planar Pseudo-Rigid Body Models." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47456.

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The Pseudo-Rigid-Body Model (PRBM) is an important technique for analyzing and synthesizing compliant mechanisms. This paper describes an approach for generalizing the PRBM and for quantifying its accuracy. The Bernoulli-Euler beam equations are solved and the solution is represented using a phase-portrait. It is shown that the slope-curvature relations for all uniform fixed free-beams can be represented on a single phase portrait. This representation allows for data about PRBM representations for each cantilever beam to be efficiently presented, and for broad conclusions to be drawn, e.g. that the relative position error associated with a simple version of the PRBM is never greater than 7%.
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AU-YANG, HELEN, and JACQUES H. H. PERR. "NEW RESULTS FOR SUSCEPTIBILITIES IN PLANAR ISING MODELS." In Proceedings of APCTP-NANKAI Joint Symposium. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776358_0028.

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Reports on the topic "Planar models"

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Alon, Jonathan, and Stan Sclaroff. Recovery of Piece-Wise Planar and Piece-Wise Rigid Models from Non-Rigid Motion. Fort Belvoir, VA: Defense Technical Information Center, August 1999. http://dx.doi.org/10.21236/ada366998.

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Garcia, M. Model for designing planar magnetron cathodes. Office of Scientific and Technical Information (OSTI), September 1997. http://dx.doi.org/10.2172/328518.

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Garcia, M. Model for designing planar magnetron cathodes. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/16554.

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Hordiienko, Valentyna V., Galyna V. Marchuk, Tetiana A. Vakaliuk, and Andrey V. Pikilnyak. Development of a model of the solar system in AR and 3D. [б. в.], November 2020. http://dx.doi.org/10.31812/123456789/4410.

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In this paper, the possibilities of using augmented reality technology are analyzed and the software model of the solar system model is created. The analysis of the available software products modeling the solar system is carried out. The developed software application demonstrates the behavior of solar system objects in detail with augmented reality technology. In addition to the interactive 3D model, you can explore each planet visually as well as informatively – by reading the description of each object, its main characteristics, and interesting facts. The model has two main views: Augmented Reality and 3D. Real-world object parameters were used to create the 3D models, using the basic ones – the correct proportions in the size and velocity of the objects and the shapes and distances between the orbits of the celestial bodies.
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Lessick, Jennifer, Bethel Tarekegne, and Rebecca O'Neil. Business Models for Coal Plant Decommissioning. Office of Scientific and Technical Information (OSTI), August 2021. http://dx.doi.org/10.2172/1821476.

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Khvechshenko, D. V., Y. I. Kogan, and S. K. Nechaev. The vortices in the latticed model of the planar nematic. Office of Scientific and Technical Information (OSTI), June 1990. http://dx.doi.org/10.2172/105510.

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Garcia, M. A 2D fluid model of the DC planar magnetron cathode. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/251390.

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Lieth, J. Heiner, Michael Raviv, and David W. Burger. Effects of root zone temperature, oxygen concentration, and moisture content on actual vs. potential growth of greenhouse crops. United States Department of Agriculture, January 2006. http://dx.doi.org/10.32747/2006.7586547.bard.

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Soilless crop production in protected cultivation requires optimization of many environmental and plant variables. Variables of the root zone (rhizosphere) have always been difficult to characterize but have been studied extensively. In soilless production the opportunity exists to optimize these variables in relation to crop production. The project objectives were to model the relationship between biomass production and the rhizosphere variables: temperature, dissolved oxygen concentration and water availability by characterizing potential growth and how this translates to actual growth. As part of this we sought to improve of our understanding of root growth and rhizosphere processes by generating data on the effect of rhizosphere water status, temperature and dissolved oxygen on root growth, modeling potential and actual growth and by developing and calibrating models for various physical and chemical properties in soilless production systems. In particular we sought to use calorimetry to identify potential growth of the plants in relation to these rhizosphere variables. While we did experimental work on various crops, our main model system for the mathematical modeling work was greenhouse cut-flower rose production in soil-less cultivation. In support of this, our objective was the development of a Rose crop model. Specific to this project we sought to create submodels for the rhizosphere processes, integrate these into the rose crop simulation model which we had begun developing prior to the start of this project. We also sought to verify and validate any such models and where feasible create tools that growers could be used for production management. We made significant progress with regard to the use of microcalorimetry. At both locations (Israel and US) we demonstrated that specific growth rate for root and flower stem biomass production were sensitive to dissolved oxygen. Our work also identified that it is possible to identify optimal potential growth scenarios and that for greenhouse-grown rose the optimal root zone temperature for potential growth is around 17 C (substantially lower than is common in commercial greenhouses) while flower production growth potential was indifferent to a range as wide as 17-26C in the root zone. We had several set-backs that highlighted to us the fact that work needs to be done to identify when microcalorimetric research relates to instantaneous plant responses to the environment and when it relates to plant acclimation. One outcome of this research has been our determination that irrigation technology in soilless production systems needs to explicitly include optimization of oxygen in the root zone. Simply structuring the root zone to be “well aerated” is not the most optimal approach, but rather a minimum level. Our future work will focus on implementing direct control over dissolved oxygen in the root zone of soilless production systems.
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Peterson, Eric, Wenbin Wei, and Lydon George. A Model for Integrating Rail Services with other Transportation Modalities: Identifying the Best Practices and the Gaps for California’s Next State Rail Plan. Mineta Transportation Institute, July 2021. http://dx.doi.org/10.31979/mti.2021.1949.

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The California State Rail Plan (CSRP) is among the best rail plan documents published by any jurisdiction in the United States to date. As such, the CSRP is used in this paper as the basis of comparison to other state rail service plans. These plans will have been submitted to the Federal Railroad Administration (FRA) on record as of June 2020—as required under Section 303 of the Passenger Rail Investment and Improvement Act (PRIIA) of 2008. The purpose of this paper is to identify the best practices and gaps that may inform California and other states in their future rail service plan development. This paper is grounded in the realization that, while the general outline of FRA requirements is uniform for all states, the actual content and inclusion of these requirements in the myriad state plans varies greatly. For example, California was granted an exception to help update FRA Rail Plan Guidance for its 2018 Rail Plan, other states have complained that FRA guidance and requirements on rail service planning have put state rail agencies in the position of constantly writing plans with little or no time to implement them. Throughout this research, the authors identify all the elements of FRA guidelines as reflected in the CSRP and rail plans of other states. This report also identifies the best features and planning strategies that may inform and improve the state rail planning process going forward, steps that will positively contribute to the public benefit of enhanced rail systems.
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Dudley, Lynn M., Uri Shani, and Moshe Shenker. Modeling Plant Response to Deficit Irrigation with Saline Water: Separating the Effects of Water and Salt Stress in the Root Uptake Function. United States Department of Agriculture, March 2003. http://dx.doi.org/10.32747/2003.7586468.bard.

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Standard salinity management theory, derived from blending thermodynamic and semi- empirical considerations leads to an erroneous perception regarding compensative interaction among salinity stress factors. The current approach treats matric and osmotic components of soil water potential separately and then combines their effects to compute overall response. With deficit water a severe yield decrease is expected under high salinity, yet little or no reduction is predicted for excess irrigation, irrespective of salinity level. Similarly, considerations of competition between chloride and nitrate ions have lead to compensation hypothesis and to application of excess nitrate under saline conditions. The premise of compensative interaction of growth factors behind present practices (that an increase in water application alleviates salinity stress) may result in collateral environmental damage. Over-irrigation resulting in salinization and elevated ground water threatens productivity on a global scale. Other repercussions include excessive application of nitrate to compensate for salinity, unwillingness to practice deficit irrigation with saline water, and under-utilization of marginal water. The objectives for the project were as follows: 1) To develop a database for model parameterization and validation by studying yield and transpiration response to water availability, excessive salinity and salt composition. 2) To modify the root sink terms of an existing mechanism-based model(s) of water flow, transpiration, crop yield, salt transport, and salt chemistry. 3) To develop conceptual and quantitative models of ion uptake that considers the soil solution concentration and composition. 4) To develop a conceptual and quantitative models of effects of NaCl and boron accumulation on yield and transpiration. 5) To add a user interface to the water flow, transpiration, crop yield, salt transport, chemistry model to make it easy for others to use. We conducted experiments in field plots and lysimeters to study biomass production and transpiration of com (Zeamays cv. Jubilee), melon (Cucumismelo subsp. melo cv. Galia), tomato (Lycopersiconesculentum Mill. cv. 5656), onion (Alliumcepa L. cv. HA 944), and date palms (Phoenix Dactylifera L. cv. Medjool) under salinity combined with water or with nitrate (growth promoters) or with boron (growth inhibitor). All factors ranged from levels not limiting to plant function to severe inhibition. For cases of combined salinity with water stress, or excess boron, we observed neither additive nor compensative effects on plant yield and transpiration. In fact, yield and transpiration at each combination of the various factors were primarily controlled by one of them, the most limiting factor to plant activity. We proposed a crop production model of the form Yr = min{gi(xi), where Yr = Yi ym-1 is relative yield,Ym is the maximum yield obtained in each experiment, Xi is an environmental factor, gi is a piecewise-linear response function, Yi is yield of a particular treatment. We selected a piecewise-linear approach because it highlights the irrigation level where the response to one factor ceases and a second factor begins. The production functions generate response "envelopes" containing possible yields with diagonal lines represent response to Xi alone and the lines parallel to the X-axis represent response to salinity alone. A multiplicative model was also derived approximating the limiting behaviour for incorporation in a hydrochemical model. The multiplicative model was selected because the response function was required to be continuous. The hydrochemical model was a better predictor of field-measured water content and salt profiles than models based on an additive and compensative model of crop response to salinity and water stress.
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