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Relevant bibliographies by topics / Geometrical configuration

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Academic literature on the topic 'Geometrical configuration'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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Journal articles on the topic "Geometrical configuration"

1

Destainville, N., R. Mosseri, and F. Bailly. "Configurational entropy in random tilings: A geometrical analysis in configuration space." Mathematical and Computer Modelling 26, no. 8-10 (October 1997): 313–14. http://dx.doi.org/10.1016/s0895-7177(97)00214-8.

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Chen, F.-C. "On the structural configuration synthesis and geometry of machining centres." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 215, no. 6 (June 1, 2001): 641–52. http://dx.doi.org/10.1243/0954406011524018.

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The purpose of this paper is to synthesize all possible structural configurations of three-, four- and five-axis machining centres and to investigate the geometrical characteristics of five-axis machining centres. Based on the definition of coordinate systems and the configuration code of machine tools, it was found that there are 24, 96 and 288 feasible configurations for three-, four- and five-axis machining centres respectively. The geometric characteristics of five-axis machining centres were analysed and summarized by using the method of coordinate transformation. The results of this paper are beneficial to engineers in the design and evaluation of machining centres.

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Azlan Musa, Mohd, Mohammad Fadhli Ahmad, Nor Aieni Mokhtar, and Ahmad Jusoh. "Investigation of Wave Overtopping from Various Geometrical Configurations of Coastal Breakwater Ramps." International Journal of Engineering & Technology 7, no. 3.28 (August 17, 2018): 24. http://dx.doi.org/10.14419/ijet.v7i3.28.20959.

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Breakwater is often required for erosion protection. The effectiveness of breakwater structure as a coastal defence could be determined through overtopping wave surpass onto its crest freeboard structure. The common design practice of breakwater structure is using a linear ramp configuration. There is still a limited knowledge on the contribution of various configuration ramps shape into breakwater efficiency. Thus, this study attempts to investigate a few other's configuration of ramp geometries through overtopping discharge rate performance and identified its relationships with the crest freeboard. Three configurations of ramp geometries (convex, concave and cubic) have been investigated using numerical simulation of CFD-Flow 3D software. The result indicates that, there are significant influences of ramp configuration parameters on the overtopping rate and the highest overtopping rate is contributed from cubic shape ramp geometry. It is recommended that the detail study on cubic ramp shape geometry for determining its capability in increasing overtopping rate.

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De Queiroz, João Pedro T. P., Marcelo L. Cunha, Ana Pavlovic, Luiz Alberto O. Rocha, Elizaldo D. Dos Santos, Grégori da S. Troina, and Liércio A. Isoldi. "Geometric Evaluation of Stiffened Steel Plates Subjected to Transverse Loading for Naval and Offshore Applications." Journal of Marine Science and Engineering 7, no. 1 (January 7, 2019): 7. http://dx.doi.org/10.3390/jmse7010007.

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This work searched for the optimal geometrical configuration of simply supported stiffened plates subjected to a transverse and uniformly distributed load. From a non-stiffened reference plate, different geometrical configurations of stiffened plates, with the same volume as the reference plate, were defined through the constructal design method. Thus, applying the exhaustive search technique and using the ANSYS software, the mechanical behaviors of all the suggested stiffened plates were compared to each other to find the geometrical configuration that provided the minimum deflection in the plate’s center when subjected to this loading. The optimum geometrical configuration of stiffeners is presented at the end of this work, allowing a reduction of 98.57% for the central deflection of the stiffened plate if compared to the reference plate. Furthermore, power equations were adjusted to describe the deflections for each combination of longitudinal and transverse stiffeners as a function of the ratio between the height and the thickness of the stiffeners. Finally, a unique equation for determining the central deflections of the studied stiffened plates based only on the number of longitudinal stiffeners without significantly losing accuracy has been proposed.

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Dijksman, E. A. "Assembling Complete Pole Configurations for (Over)Constrained Planar Mechanisms." Journal of Mechanical Design 116, no. 1 (March 1, 1994): 215–25. http://dx.doi.org/10.1115/1.2919350.

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The complete pole configuration of a planar n-link mechanism having one instantaneous degree of mobility, possesses (3n−4)/2 independent poles determining (n−2)2/2 remaining poles of the configuration. The dependency is demonstrated through Desargues’ Theorem and her generalizations. Simultaneously, pole configurations have been “elated” into three-dimensional point-lattices intersected by a plane. The insight obtained in these configurations allows the designer to find clues in building overconstrained linkage mechanisms meeting certain geometrical properties.

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SEGEV, REUVEN. "A GEOMETRICAL FRAMEWORK FOR THE STATICS OF MATERIALS WITH MICROSTRUCTURE." Mathematical Models and Methods in Applied Sciences 04, no. 06 (December 1994): 871–97. http://dx.doi.org/10.1142/s0218202594000480.

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A geometrical framework for the formulations of the invariant mechanical theories of materials with microstructure is presented. The suggested framework is based on the construction of an infinite-dimensional manifold containing the configurations of the body. Each configuration includes both the macro- and the micro-states of the body. The notions of forces, stresses, balance laws and latent microstructure are discussed. Liquid crystals are used as an example.

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KUPRIKOV, Mikhail Yu, and Leonid V. MARKIN. "Methods of the automated aircraft configuration." INCAS BULLETIN 11, S (August 1, 2019): 125–34. http://dx.doi.org/10.13111/2066-8201.2019.11.s.12.

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Aircraft are great and comprehensive technical systems, which are characterised by the great configuration density. This article presents formation of the geometrical conceptual design of the aircraft on the basis of the formal heuristic procedures within the framework of the infrastructural constraints. In addition, this article includes description of influence of the aerodynamic configuration and the volume-weight configuration upon formation of the geometrical conceptual design of the aircraft, as well as description of other mass/inertia characteristics of the aggregates, which are to be installed within the specific aircraft. This article also states that in the case of the "very strict" infrastructural constraints, it is necessary to solve "the inverse" problem of configuration, that is the problem, where initial data for formation of the geometrical conceptual design of the aircraft are determined by the necessary configuration space, which is determined by the infrastructural constraints. The article presents the project problem (in aggregate) of finding rational values for parameters of the geometrical conceptual design of the aircraft as the problem of the multiple criteria discrete optimisation. This article states that it is possible to formulate this problem as the search of the vector of structural parameters (that is, search of the multitude of the admissible alternatives of the drawing and designing solutions).

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Ali, Nicholas, and Kamran Behdinan. "OPTIMAL GEOMETRICAL DESIGN OF AIRCRAFT USING GENETIC ALGORITHMS." Transactions of the Canadian Society for Mechanical Engineering 26, no. 4 (December 2003): 373–88. http://dx.doi.org/10.1139/tcsme-2002-0022.

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With the advent of computers and search and optimization tools such as the genetic algorithm, the ability to manipulate numerous aircraft design parameters in a reasonable amount of time is feasible. From this angle, the lengthy time and effort spent creating and integrating aerodynamics codes, sizing routines, and performance modules, can be mitigated by the use of a genetic algorithm. Consequently, a genetic algorithm has been created and employed as a cost effective tool to explore possible aircraft geometries in the conceptual design process of the aircraft. A program has been developed to address most aspects of aircraft design such as aircraft sizing and configuration, performance, and propulsion, to name a few. These codes have been integrated into a genetic algorithm, which performs the task of searching and optimizing. The adaptive penalty method has been employed to handle all constraints imposed on the design. In addition, adjustments for varying degrees of selection and crossover intensities and types have been studied. A design study has also been carried out to compare an existing aircraft shape with the genetic algorithm optimized aircraft shape and configuration. Results indicate that the genetic algorithm is a powerful multi-disciplinary optimization and search tool, capable of simultaneously managing and varying numerous aircraft design parameters. Moreover, the genetic algorithm is capable of finding aircraft geometries and configurations that are both efficient and cost effective.

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Jirout, Tomáš, and Dita Jiroutová. "Application of Theoretical and Experimental Findings for Optimization of Mixing Processes and Equipment." Processes 8, no. 8 (August 8, 2020): 955. http://dx.doi.org/10.3390/pr8080955.

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The homogenization of the agitated batch and ensuring the suspension of particles are the most frequently encountered requirements in terms of mixing applications. These operations are affected by the flow of the agitated batch. The geometrical parameters of the mixing system, especially the shape of the agitator blade, affect flow and circulation in the agitated batch. The present work provides a general description of the most common processes in the agitated batch (blending and particle suspension), hydrodynamic parameters (flow in agitated batches, pumping and circulation capacity of impellers) and the geometrical configurations of the mixing equipment (shape of vessel, baffle and impeller, and their mutual arrangement) that influence the process. The dimensionless process characteristics of the agitator were derived by theoretical analysis. These characteristics were applied to evaluate an extensive set of experimental data with various geometric configurations of the mixing equipment. This study shows how the flow in the agitated batch, caused by the pumping and circulating effects of the agitators, affects the parameters and energy efficiency of these processes, depending on the geometric configuration of the mixing equipment. Moreover, the benefits of the hydrofoil impellers used for these mixing processes are presented.

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BUENO, J. R., and D. D. LORIGGIO. "Analysis of second order effects: case study." Revista IBRACON de Estruturas e Materiais 9, no. 4 (August 2016): 494–501. http://dx.doi.org/10.1590/s1983-41952016000400002.

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Abstract This paper presents a nonlinear static analysis of a reinforced concrete plane frame. It has as main objective is to realize a global stability verification of a plane frame, by using geometric stiffness matrix. In order to obtain first and second order combined effects, equilibrium and kinematic relations were studied in the deformed geometric configuration. These results were obtained by using geometric stiffness matrix and multiplying horizontal forces by Gamma-Z coefficient. Both procedures disclosed very similar results in the study, indicating that Gamma-Z can be used to study equilibrium and kinematic relations in deformed geometrical configuration of the structure.

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Dissertations / Theses on the topic "Geometrical configuration"

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Ullah, Muhammad Arshad [Verfasser]. "Forage production in Panicum grass-legumes intercropping by combining geometrical configuration, inoculation and fertilizer under rainfed conditions / Muhammad Arshad Ullah." Kassel : Kassel University Press, 2010. http://d-nb.info/1016846126/34.

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Oksuz, Nevin. "Quantum-chemical Study Of Geometrical And Electronic Structures Of Aromatic Five-membered Heterocyclic Oligomers In The Ground And Lowest Singlet Excited States." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605397/index.pdf.

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The nature of the ground state and the first (lowest) singlet excited state geometrical conformations and electronic transitions in the aromatic five-membered heterocyclic oligomers &ndash
oligothiophenes (nT), oligofurans (nF), and oligopyrroles (nP)- containing up to six monomer units (total of 18 molecules) were explored using several computational methodologies. Geometry optimizations were carried out at Austin Model 1 (AM1), Restricted Hartree-Fock (RHF/6-31G*), and Density Functional Theory (DFT, B3LYP/6-31G*) levels for the ground-state conformations of these structurally well-defined heterocyclic oligomers. The Configuration Interaction Singles (CIS) method with the 6-31G* basis set was chosen in computation of the optimal geometry of the lowest singlet excited state. Lowest singlet excitation S1ß
S0 energies were calculated using the Zerner&rsquo
s Intermediate Neglect of Differential Overlap for Spectroscopy (ZINDO/S), CIS (CIS/6-31G*), and Time-Dependent DFT (TDDFT/6-31G* and TDDFT/6-31+G*) methods. In computation of the emission S1à
S0 energies, we have employed all methods above except ZINDO/S. In investigation of geometries of the ground and lowest singlet excited state, we compared the bond length alternation (BLA) parameters, Dri in the conjugated backbone of the oligomers. Saturation of the geometrical parameters at the center of oligomers was observed after a certain chain length. Among all methodologies used in computation of excitation (S1ß
S0) and emission (S1à
S0) energies, TDDFT results showed the best agreement with experimental data. Fits of computed and experimental excitation energies to an exponential function using the least squares method enabled us to predict Effective Conjugation Length (ECL) values. We obtained the ECLs of 17 (17), 16 (15), and 14 (13) monomer units for polythiophene (PTh), polyfuran (PFu), and polypyrrole (PPr), which have very good agreement with the results obtained from the fits of experimental data (the values in parentheses).

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Béreiziat, Daniel. "Structure locale de l'écoulement de fluides newtoniens et non newtoniens en canaux ondules." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL036N.

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L'objectif de ce travail expérimental consiste en la reconnaissance approfondie de la structure locale de l'écoulement le long de parois ondulées de grande amplitude, représentatives des échangeurs de chaleur adaptés au traitement des produits alimentaires. Les expériences sont menées à partir de deux techniques de mesure: la vélocimétrie à laser et la méthode polarographique. La gamme expérimentale d'écoulement va d'un nombre de Reynolds égal à 7 jusqu'à 17000. Les paramètres géométriques des plaques ondulées sont: le pas de l'ondulation vaut 11 mm ou 65 mm, le diamètre hydraulique varie de 7 mm à 33 mm et l'angle entre la direction principale de l'écoulement et l'ondulation est de 90 (géométrie 2d) ou de 60 (géométrie 3d). L'ensemble des mesures en canal bidimensionnel 2d montre la présence d'un tourbillon de recirculation qui nait dans la zone de sillage pour un nombre de Reynolds généralise reg de 30 et disparait pour reg=530. La fin du régime laminaire ou le gradient pariétal de vitesse varie linéairement avec reg est détectée pour un nombre de Reynolds généralisé de 2000 qui constitue le seuil d'apparition d'une turbulence pleinement développée. Nous avons montre également l'influence du caractère rheofluidifiant des solutions sur la forme, la taille et le développement du tourbillon de recirculation en régime laminaire

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Lallemand, Christine. "Optimisation de forme des structures axisymetriques." Lyon, INSA, 1985. http://www.theses.fr/1985ISAL0058.

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L'étude porte sur la détermination des formes optimales de structures axisymétriques soumises à des charg~nts dissymétriques, (développements en séries de Fourier). L'objectif est de rendre la pius uniforme possible la contrainte tangentielle. Le programme utilise une méthode dite de Lagrangien étendu pour l'optimisation mathématique d'une fonction soumise à des limitations. Plusieurs améliorations ont été apportées au calcul des gradients. Le programme présente les résultats obtenus sur un exemple emprunté à l'aéronautique, (boîte de vitesse d'hélicoptères).

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Mignon, Hervé. "Anémométrie phase Doppler et particules non sphériques : cas des cylindres et des ellipsoïdes." Rouen, 1997. http://www.theses.fr/1997ROUES004.

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L'anémométrie phase Doppler est une technique de mesure optique utilisée pour évaluer la taille et la vitesse de particules sphériques et homogènes en mouvement. Ce mémoire est dédié à l'extension de cette technique aux particules non sphériques. En raison de leurs importances tant fondamentales qu'appliquées, ce manuscrit se focalise sur les cylindres infiniment longs et les particules ellipsoïdes. La géométrie dite plane est employée pour déterminer la taille d'une particule cylindrique arbitrairement orientée. La réponse des géométries dites planes et standard est étudiée pour des particules ellipsoïdes, déformées ou en cours de déformation. L'influence d'un écart à la sphéricité sur une mesure phase Doppler est quantifiée. Ces configurations sont évaluées numériquement par l'optique géométrique puis validées expérimentalement.

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Khalid, Jawed Mohammad. "Geometrically nonlinear configurations in rod-like structures." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106703.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 203-216).
Rod-like structures are ubiquitous in both nature (e.g. bacterial flagella) and engineering (ropes, cables, pipelines, and Carbon nanotubes), from nanometer to kilometer scale, and often undergo geometrically nonlinear deformation. Due to the slender geometry of the structures, the material strain usually remains in linear elastic limit even though the deformed geometry deviates significantly from the original geometry. The geometric nonlinearities that result from the deformation process pose enormous challenges to traditional analytical and numerical tools. Moreover, it is often unfeasible to perform experiments at the original length-scale of these systems. We overcome these challenges by combining model experiments with cutting-edge computational tools ported from computer graphics, and theoretical analysis towards developing predictive physical understanding of these systems. The prominence of geometry in this class of systems enables the scaling (up or down) of the problem to the desktop scale, which allows for systematic experimental exploration of parameter space. In parallel, we conduct numerical simulations using the Discrete Elastic Rods (DER) method, which was originally developed for the animation industry for special effects of the visually dramatic dynamics of hair, fur, and other rod-like structures. We port DER into engineering as a predictive computational tool and test ride it against our own model experiments. A collection of problems from three a priori unrelated scenarios, at disparate length-scales, are explored. First, as a model for laying of submarine cables onto the seabed (kilometer scale), we consider deployment of elastic rods onto a moving substrate (conveyor belt) and quantify the resulting nonlinear coiling patterns. The DER method is employed to identify the phase boundaries between different patterns and characterize the morphology. Our results are interpreted using a reduced geometric model for the evolution of the position of the contact point with the belt and the curvature of the rod in its neighborhood. This geometric model reproduces all of the coiling patterns, which allows us to establish a universal link between our elastic problem and the analogous patterns obtained when depositing a viscous thread onto a moving surface; a well-known system referred to as the fluid mechanical sewing machine. Secondly, we consider a macroscopic analog model for the locomotion of uni-flagellar bacteria (micron scale) in a viscous fluid. Our precision experiments are compared against numerical simulations that employ the Lighthill's slender body theory (a non-local description of fluid force) and DER, with excellent quantitative agreement without any fitting parameter. A novel mechanical instability is uncovered, whereby the filament buckles above a critical rotation frequency. We then augment our experiments and simulations to include the effect of a no-slip rigid boundary on the locomotion of uni-flagellar bacteria. We find that the propulsive force is strongly affected by the presence of a nearby boundary. Thirdly, we perform precision desktop experiments with overhand knots (centimeter scale) with increasing values for the crossing number (our measure of topology) and characterize their mechanical response through tension-displacement tests. The tensile force required to tighten the knot is governed by an intricate balance between topology, bending, and friction. A reduced theory is developed, which predictively rationalizes the process.
by Mohammad Khalid Jawed.
Ph. D.

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Cho, Sung Nae. "Casimir Force in Non-Planar Geometric Configurations." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/11156.

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The Casimir force for charge-neutral, perfect conductors of non-planar geometric configurations have been investigated. The configurations were: (1) the plate-hemisphere, (2) the hemisphere-hemisphere and (3) the spherical shell. The resulting Casimir forces for these physical arrangements have been found to be attractive. The repulsive Casimir force found by Boyer for a spherical shell is a special case requiring stringent material property of the sphere, as well as the specific boundary conditions for the wave modes inside and outside of the sphere. The necessary criteria in detecting Boyer's repulsive Casimir force for a sphere are discussed at the end of this thesis.
Ph. D.

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Cai, Li. "Dexel-based geometric reasoning and visualization for die configuration /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486402288260244.

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Rain, Pascal. "Étude des phénomènes prédisruptifs et disruptifs à grande distance dans l'huile minérale de transformateur sous tension alternative." Grenoble INPG, 1992. http://www.theses.fr/1992INPG0076.

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Ce travail se rapporte a l'étude des phénomènes predisruptifs et disruptifs des grands intervalles d'huile minérale (jusqu'a 25 cm) soumis a de hautes tensions alternatives 50 Hz (jusqu'a 250 kvcr). L'objectif est d'obtenir une compréhension plus approfondie des mécanismes de génération et de propagation des streamers, canaux conducteurs lumineux plus ou moins ramifies qui précèdent le claquage des liquides diélectriques, et d'identifier les facteurs d'atténuation de la tenue des grands volumes d'huile soumis a des hautes tensions. Le comportement des streamers a été caractérise en géométrie divergente grâce a un dispositif de visualisation approprie. L'influence de la configuration des électrodes a été soulignée. Les résultats ont permis de proposer un schéma général du claquage a grande distance. Parmi les causes les plus plausibles de rupture d'isolation en champ quasi-uniforme, l'action de particules conductrices peu nombreuses mais de grande taille a été retenue. Le comportement d'une particule métallique millimétrique unique a été étudie et son influence sur la tenue diélectrique a été caractérisée

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Herterich, Emmi. "Sequential Holonomic Quantum Gates : Open Path Holonomy in Λ-configuration." Thesis, Uppsala universitet, Materialteori, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-296137.

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In the Λ-system, non-adiabatic holonomic quantum phases are used to construct holonomic quantum gates. An interesting approach would be to implement open path holonomies in the Λ-system. By dividing the loop into two curve segments with a unitary transformation between them, universality can be reached. In doing so the exibility of the scheme has been increased by the fact that one single full pulse is now enough for universality, and we have achieved a clearer proof of the geometric property of the Λ system.
I ett Λ-system så används icke-adiabatiska holonoma kvantfaser för att bygga holonoma kvantgrindar. I detta arbete undersöker vi om holonomier för öppna kurvor kan implementeras i Λsystemet. Genom att dela upp en loop i Λ-systemet i två sekvenser med en unitär transformation emellan så kan vi konstruera en universell holonom kvantgrind. Med detta så har vi ökat exibiliteten för systemet genom att vi nu bara behöver ta en loop för att nå universalitet, och vi har även erhållit en klarare bild över den geometriska egenskapen hos Λ-systemet.

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Books on the topic "Geometrical configuration"

1

Fomenko, A. T. Geometrical and statistical methods of analysis of star configurations: Dating Ptolemy's Almagest. Boca Raton: CRC Press, 1993.

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1962-, Sturmfels Bernd, ed. Introduction to tropical geometry. Providence, Rhode Island: American Mathematical Society, 2015.

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Barg, Alexander, and O. R. Musin. Discrete geometry and algebraic combinatorics. Providence, Rhode Island: American Mathematical Society, 2014.

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Coopersmith, Jennifer. Hamiltonian Mechanics. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198743040.003.0007.

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Hamilton’s genius was to understand what were the true variables of mechanics (the “p − q,” conjugate coordinates, or canonical variables), and this led to Hamilton’s Mechanics which could obtain qualitative answers to a wider ranger of problems than Lagrangian Mechanics. It is explained how Hamilton’s canonical equations arise, why the Hamiltonian is the “central conception of all modern theory” (quote of Schrödinger’s), what the “p − q” variables are, and what phase space is. It is also explained how the famous conservation theorems arise (for energy, linear momentum, and angular momentum), and the connection with symmetry. The Hamilton-Jacobi Equation is derived using infinitesimal canonical transformations (ICTs), and predicts wavefronts of “common action” spreading out in (configuration) space. An analogy can be made with geometrical optics and Huygen’s Principle for the spreading out of light waves. It is shown how Hamilton’s Mechanics can lead into quantum mechanics.

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Geometrical and Statistical Methods of Analysis of Star Configurations Dating Ptolemy's Almagest. Taylor & Francis Group, 2017.

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Geometrical and Statistical Methods of Analysis of Star Configurations Dating Ptolemy's Almagest. CRC Press, 2018. http://dx.doi.org/10.1201/9781351072250.

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Center, Langley Research, and Ohio State University. ElectroScience Laboratory., eds. A uniform GTD analysis of the EM diffraction by a thin dielectic/ferrite half-plane and related configurations. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1985.

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Coolen, Ton, Alessia Annibale, and Ekaterina Roberts. Generating Random Networks and Graphs. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198709893.001.0001.

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This book supports researchers who need to generate random networks, or who are interested in the theoretical study of random graphs. The coverage includes exponential random graphs (where the targeted probability of each network appearing in the ensemble is specified), growth algorithms (i.e. preferential attachment and the stub-joining configuration model), special constructions (e.g. geometric graphs and Watts Strogatz models) and graphs on structured spaces (e.g. multiplex networks). The presentation aims to be a complete starting point, including details of both theory and implementation, as well as discussions of the main strengths and weaknesses of each approach. It includes extensive references for readers wishing to go further. The material is carefully structured to be accessible to researchers from all disciplines while also containing rigorous mathematical analysis (largely based on the techniques of statistical mechanics) to support those wishing to further develop or implement the theory of random graph generation. This book is aimed at the graduate student or advanced undergraduate. It includes many worked examples, numerical simulations and exercises making it suitable for use in teaching. Explicit pseudocode algorithms are included to make the ideas easy to apply. Datasets are becoming increasingly large and network applications wider and more sophisticated. Testing hypotheses against properly specified control cases (null models) is at the heart of the ‘scientific method’. Knowledge on how to generate controlled and unbiased random graph ensembles is vital for anybody wishing to apply network science in their research.

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Owens, Thomas. Wordsworth, Coleridge, and 'the language of the heavens'. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198840862.001.0001.

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This book explores some of the exultant visions inspired by Wordsworth’s and Coleridge’s close scrutiny of the night sky, the natural world, and the domains of science. It examines a set of scientific patterns drawn from natural, geometric, celestial, and astronomical sources which Wordsworth and Coleridge used to express their ideas about poetry, religion, literary criticism, and philosophy. It establishes the central important of analogy in their creative thinking. Analogies prompted the poets’ imaginings in geometry and cartography, in nature (representations of the Moon) and natural history (studies of spider-webs, streams, and dew), in calculus and conical refraction, and in the discovery of infra-red and ultraviolet light. Although this is primarily a study of the patterns which inspired their writing, the findings overturn the prevalent critical consensus that Wordsworth and Coleridge did not have the access, interest, or capacity to understand the latest developments in nineteenth-century astronomy and mathematics, which they did in fact possess. This research reinstates many relationships which the poets had with scientists and their sources. Most significantly, the book illustrates that these sources are not simply another context or historical lens through which to engage with Wordsworth’s and Coleridge’s work but are instead a controlling device of the symbolic imagination. Exploring the structures behind Wordsworth’s and Coleridge’s poems and metaphysics stakes out a return to the evidence of the Romantic imagination, not for its own sake, but in order to reveal that their analogical configuration of the world provided them with a scaffold for thinking, an intellectual orrery which ordered artistic consciousness and which they never abandoned.

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Book chapters on the topic "Geometrical configuration"

1

Zhang, Xiaolong, and Baoxin Li. "Retrieving Images of Similar Geometrical Configuration." In Advances in Visual Computing, 449–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-17274-8_44.

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Simons, Jack. "Configuration Interaction Energy Derivatives." In Geometrical Derivatives of Energy Surfaces and Molecular Properties, 27–34. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4584-5_3.

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King, Harry F., and Andrew Komornicki. "Single Configuration SCF Second Derivatives on a Cray." In Geometrical Derivatives of Energy Surfaces and Molecular Properties, 207–14. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4584-5_16.

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Talukdar, Priyanka, and Arindam Dey. "Effect of Varying Geometrical Configuration of Sheet Piles on Exit Gradient and Uplift Pressure." In Lecture Notes in Civil Engineering, 135–42. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0368-5_15.

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Bourou, Dimitra, Marco Schorlemmer, and Enric Plaza. "Image Schemas and Conceptual Blending in Diagrammatic Reasoning: The Case of Hasse Diagrams." In Diagrammatic Representation and Inference, 297–314. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-86062-2_31.

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AbstractIn this work, we propose a formal, computational model of the sense-making of diagrams by using the theories of image schemas and conceptual blending, stemming from cognitive linguistics. We illustrate our model here for the case of a Hasse diagram, using typed first-order logic to formalise the image schemas and to represent the geometry of a diagram. The latter additionally requires the use of some qualitative spatial reasoning formalisms. We show that, by blending image schemas with the geometrical configuration of a diagram, we can formally describe the way our cognition structures the understanding of, and the reasoning with, diagrams. In addition to a theoretical interest for diagrammatic reasoning, we also briefly discuss the cognitive underpinnings of good practice in diagram design, which are important for fields such as human-computer interaction and data visualization.

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Pisanski, Tomaž, and Brigitte Servatius. "Geometric Configurations." In Configurations from a Graphical Viewpoint, 197–263. Boston: Birkhäuser Boston, 2012. http://dx.doi.org/10.1007/978-0-8176-8364-1_6.

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Suciu, Alexander I. "Geometric and homological finiteness in free abelian covers." In Configuration Spaces, 461–501. Pisa: Scuola Normale Superiore, 2012. http://dx.doi.org/10.1007/978-88-7642-431-1_21.

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Bouadi, M., K. Yanallah, M. R. Bouazza, and F. Pontiga. "Effect of the Variation of the Electrode Geometrical Configuration on the Electric Wind Velocity Produced by an Electric Corona Discharge." In ICREEC 2019, 465–74. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5444-5_58.

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Whiteley, Walter. "Representing Geometric Configurations." In Learning and Geometry: Computational Approaches, 143–78. Boston, MA: Birkhäuser Boston, 1996. http://dx.doi.org/10.1007/978-1-4612-4088-4_7.

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Schmiermund, Torsten. "Configuration Isomers: Geometric Isomerism." In essentials, 23–28. Wiesbaden: Springer Fachmedien Wiesbaden, 2021. http://dx.doi.org/10.1007/978-3-658-32035-5_5.

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Conference papers on the topic "Geometrical configuration"

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Vunckx, K., M. Defrise, D. Beque, C. Vanhove, A. Andreyev, and J. Nuyts. "Geometrical calibration and aperture configuration design in multi-pinhole SPECT." In 2008 5th IEEE International Symposium on Biomedical Imaging (ISBI 2008). IEEE, 2008. http://dx.doi.org/10.1109/isbi.2008.4541268.

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Kočí, Jan, and Jiří Maděra. "Optimization procedure for design of geometrical configuration of acoustic bricks." In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5043729.

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Elsabahy, Mohamed M., Ramy Rabie, and Mahmoud Ahmed. "Performance Study of Thermoelectric Power Generators at Different Geometrical Configurations." In ASME 2021 15th International Conference on Energy Sustainability collocated with the ASME 2021 Heat Transfer Summer Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/es2021-63914.

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Abstract The thermoelectric generator (TEG) output power is mainly dependent on physical characteristics, dimensions, leg configuration, number of p-n thermocouples, and other parameters. Therefore, identifying the optimal leg configuration that attains the best performance is essential. The present work considers several leg configurations by the volume reduction of the conventional prism leg, without changing the shape class via decreasing basic dimensions (i.e. leg height or cross-sectional area) and with morphing the original prism into X and trapezoidal shapes. A three-dimensional thermo-electric model is developed to investigate the performance of TEG legs at the uni-thermocouple level. Besides, to determine the reliability of the proposed configurations, a wide range of thermal boundary conditions are applied on the hot side to resemble the realistic working environment that TEG might experience at room temperature on the cold side with natural convective cooling. The model is numerically simulated after being validated with the available experimental and numerical data. The comparison indicates that decreasing leg height adversely affects the TEG performance, whereas a significant enhancement in the performance is achieved (in order) for X, trapezoidal and reduced area shapes. However, the performance enhancement, i.e. power and efficiency, associated with the simple reduced area configuration is relatively close to those achieved by X or trapezoidal ones, raising many questions in terms of simplicity and manufacturing cost. The performed research further deepens our understanding of TEG performance enhancement via optimizing legs’ attributes at uni-thermocouple as a single building block of the full-size TEG module.

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Studen, Andrej, Vladimir Cindro, Neal H. Clinthorne, Harris Kagan, Carlos Lacasta, Gabriela Llosa, Marko Mikuz, Josep F. Oliver, and Dejan Zontar. "Evaluation of geometrical arrangements of high resolution sensors in PET probe configuration." In 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD). IEEE, 2016. http://dx.doi.org/10.1109/nssmic.2016.8069529.

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Gomez, Hector, Usama Tohid, and Arturo Pacheco-Vega. "Geometrical Effects of Channel Configuration on the Performance of Membraneless Fuel Cells." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72235.

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In this study, numerical simulations were performed to find the current-voltage distribution for a laminar flow-based membraneless fuel cell (LFFC). The system uses formic acid and oxygen as the fuel and oxidant, respectively, and has a Y-shaped geometry with two separate inlets that merge into a single channel. The main objective of this work is to analyze the impact of geometry and operating conditions on the performance of these devices. This is done by proposing a novel wavy-channel-based geometry for the side walls, along with planar top and bottom walls, and comparing the behavior of the corresponding system to that of LFFCs based on straight-channel walls. Special attention is placed on the effect of both the amplitude of the sinusoid and its wavelength on the performance of the device. The effect of flow rates — in the range of [200, 350] μL/min — is also studied. The mathematical model is formulated by considering the Navier-Stokes equations along with Butler-Volmer and Fick’s law. For each fuel-cell configuration, the governing equations are discretized and solved using finite elements, and the solutions given in terms of the polarization curves. The model was first verified using published numerical data for a straight-channel-based LFFC. The simulations show that the performance achieved by the device, based on the proposed wavy channel geometry, is slightly better than that of the LFFC with straight channel walls. On the other hand, higher flowrates significantly improve the power density of the device. Although the current mathematical model may be useful in a variety of applications, improvements on it are currently underway to account for the effects of potential distributions on ions within the flow channel, and results from it will be reported in the future.

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Shi, Chen Jie, and Yin Shun Wang. "Critical current of HTS strand with geometrical symmetric configuration in magnetic field." In 2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD). IEEE, 2015. http://dx.doi.org/10.1109/asemd.2015.7453665.

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Söderberg, Rikard, and Hans L. Johannesson. "Spatial Incompatibility: Part Interaction and Tolerance Allocation in Configuration Design." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/dtm-5643.

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Abstract This paper describes how function-means modeling techniques and spatial coupling analysis can be used in early design stages to increase robustness and knowledge about geometrical sensitivity of an assembly design. By incorporating spatial constraint decomposition in function-means modeling, overall spatial constraints may be broken down into nominal dimensions and tolerances for geometrical features. The analysis is carried out at the very early design stages, before CAD models are created and when only simple sketches exist. By documenting all information about functional requirements, design parameters and constraints in a hierarchically decomposed function-means structure, spatial couplings and overall sensitivities may be detected and alternative, less sensitive, concept solutions may be developed. Analyses of functional and constraint couplings increases the knowledge of and understanding for the geometrical sensitivity of a complex assembly design. This knowledge and understanding then serves as a base for tolerance allocation, where tolerances are to be allocated in the most functional and cost effective way.

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Dagman, Andreas, and Rikard So¨derberg. "Geometrical Robust Form Division." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34764.

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By combining a Computer Aided Industrial Design (CAID) tool with a Computer Aided Tolerancing (CAT) tool, concurrent work between two related, but in industry often separated, areas with correlated product design features is facilitated. This paper presents an analysis tool that allows the creation and evaluation of split-lines in design concepts with respect to geometrical robustness and aesthetics. The aim with the analysis tool is to create products that are insensitive to manufacturing variation with the industrial design intent preserved. Since the split-lines are clues to detecting variation in assembled products, as well as part of the design language and the characterization of the product, it is important to work with these issues concurrently. The platform concept has been increasingly adopted in companies which, in many cases, provide an inheritance of the locating schemes, thus affecting the geometrical robustness of the concept, between models and sometimes even brands. This means that the parts creating an assembled product need to be designed in such a way that they satisfy the locating scheme configuration to achieve a geometrically robust solution. The functionality of the analysis tool has been demonstrated on an automobile body.

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Furuya, Hiroshi, Yoko Miyazaki, and Hiroyasu Takeuchi. "Deployment Characteristics of Creased Membrane for Solar Sail on Geometrical Configuration and Fold Pattern." In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1908.

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Camburn, Bradley, Kristin Wood, Richard Crawford, and Dan Jensen. "Novel Geometrical Approach to Designing Flow Channels." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71448.

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Many natural systems that transport heat, energy or fluid from a distributed volume to a single flow channel exhibit an analogous appearance to trees (examples include bronchial tubes, watersheds, lightening, and blood vessels). Several authors have proceeded with analytical methods to develop fractal or pseudo-fractal designs analogous to these natural instances. This implicates an implicit belief in some designers that there is an optimal attribute to this ‘tree-like’ appearance. A novel explanation for the appearance of these systems is presented in this paper. Natural systems follow the path of least resistance; or in other words, minimize transport effort. Effort is required to overcome all forms of friction (an unavoidable consequence of motion). Therefore effort minimization is analogous to transport distance (path length) minimization. Effort due to friction will be integrated over the total transport distance. Leveraging this observation a simple, geometric explanation for the emergent ‘tree-like’ architecture of many natural systems is now achievable. Note that this ‘tree’ effect occurs when most of the flow volume exhibits diffusion, with a small percentage of interdigitated high flow velocity channels. One notable application of our novel method, path length analysis, is the automated creation of cooling channel networks for heat generating micro-chips. As a demonstration, this path length analysis method was used to develop a significantly more efficient channel configuration (by 14%) than the state of the art for conductive microchip cooling. An extensive array of finite element models confirms the performance of this novel configuration.

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