Gotowe bibliografie tematyczne / Granular Assemblies

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Gotowa bibliografia na temat „Granular Assemblies”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Granular Assemblies"

HIDAKA, Jusuke. "Numerical Experiments on Granular Assemblies." Journal of the Society of Powder Technology, Japan 29, nr 6 (1992): 465–71. http://dx.doi.org/10.4164/sptj.29.465.

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Suiker, Akke S. J., i Norman A. Fleck. "Frictional Collapse of Granular Assemblies". Journal of Applied Mechanics 71, nr 3 (1.05.2004): 350–58. http://dx.doi.org/10.1115/1.1753266.

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The frictional collapse of an assembly of equisized spheres is studied by a discrete element model. The macroscopic constitutive response is determined as a function of the level of Coulomb friction between particles. It is found that the level of Coulomb friction has a strong effect upon the relative proportion of sliding and rolling between particles, and consequently upon the macroscopic strength of the granular assembly. The discrete element predictions are shown to be in good agreement with experimental results obtained from triaxial tests on an aggregate of steel spheres. It is demonstrated that the shape of the collapse surface can be adequately represented by the Lade-Duncan continuum model.

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Melin, Stephan. "Wave propagation in granular assemblies". Physical Review E 49, nr 3 (1.03.1994): 2353–61. http://dx.doi.org/10.1103/physreve.49.2353.

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Benezet, J. C., P. Adamiec i M. Nemoz-Gaillard. "Study of real granular assemblies". Powder Technology 173, nr 2 (kwiecień 2007): 118–25. http://dx.doi.org/10.1016/j.powtec.2006.10.043.

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Manciu, Marian, Robert S. Sinkovits, Surajit Sen i Alan J. Hurd. "Nonlinear acoustics in granular assemblies". Granular Matter 3, nr 1-2 (1.01.2001): 33–39. http://dx.doi.org/10.1007/s100350000067.

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Sufian, Adnan, Adrian R. Russell, Andrew J. Whittle i Mohammad Saadatfar. "Pore Characterisation in Monodisperse Granular Assemblies". Applied Mechanics and Materials 846 (lipiec 2016): 583–88. http://dx.doi.org/10.4028/www.scientific.net/amm.846.583.

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The micro-scale geometric arrangement of pores was quantitatively characterised for monodisperse granular assemblies, particularly in relation to pore volume distribution and pore orientation characteristics. Using physical experiments and numerical simulations, the pore volume distribution was uniquely described by the analytical k-gamma distribution function [1-2]. A pore orientation tensor was defined to determine the preferred orientation of individual pores. This was subsequently used to define a global orientation tensor that revealed an isotropic pore network for the monodisperse granular assemblies considered in this study. The global orientation tensor was analytically linked to the parameters defining the pore volume distribution.

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Ning, Z., A. Khoubani i T. M. Evans. "Shear wave propagation in granular assemblies". Computers and Geotechnics 69 (wrzesień 2015): 615–26. http://dx.doi.org/10.1016/j.compgeo.2015.07.004.

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Bagi, Katalin. "Stress and strain in granular assemblies". Mechanics of Materials 22, nr 3 (marzec 1996): 165–77. http://dx.doi.org/10.1016/0167-6636(95)00044-5.

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Chen, Hui Liang, i Yu Ching Wu. "Viscoplastic Analysis of Mixed Polygonal Granular Material". Advanced Materials Research 446-449 (styczeń 2012): 3578–81. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.3578.

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In this paper, a series of mixed visco-plastic analyses for assembles of three types of asphalt are made using finite element method. Governing equations are derived for motion and deformation for particles, including coupling of rigid body motion and deformation for deformable bodies. Nonlinear viscous analysis is made for the assemblies using an implicit discrete element method. Among particles, three different contact types, cohering, rubbing and sliding, are taken into account. The numerical model is applied to simulate the compaction of aggregates consisting of mixed particles of different nonlinear viscous incompressible material. After minor modification, the application of the proposed numerical model to industry is possible.

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Okiy, Karinate Valentine. "Effect of Interparticle Friction on the Micromechanical Strength Characteristics of Three Dimensional Granular Media". International Journal of Engineering Research in Africa 16 (czerwiec 2015): 79–89. http://dx.doi.org/10.4028/www.scientific.net/jera.16.79.

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The role of interparticle friction on the micromechanical strength characteristics of granular assembly subjected to gradual shearing was analyzed. Three dimensional discrete element method (DEM) was applied in the simulation of quasi-static shearing of granular assemblies with varying interparticle frictional coefficients [µ= 0.10, 0.25, 0.50]. From the reported simulation results, analysis of the following was performed for varying interparticle frictional capacities.i. The normal and tangential stress contributions of weak and strong contacts to principal stress components.ii. Contribution of strong and weak contacts to principal and deviator stress.iii. Evolution of mechanical coordination number and fabric anisotropy of strong contact forces.From this analysis, it is safe to conclude that interparticle friction has a direct effect on the major and minor principal stress components in sheared granular assemblies. Consequently, increasing interparticle friction capacity enhances macroscopic shear strength in sheared granular assemblies. Likewise, at the peak shear strength of the sheared granular media, there exists a maximum fabric anisotropy of strong contact forces and this corresponds to a minimum value of mechanical coordination number (minimum possible number of load bearing contacts per particle).

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Rozprawy doktorskie na temat "Granular Assemblies"

Smith, Laurence M. "Statistical and visual probing of evolving granular assemblies". Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/843092/.

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The majority of processes in the chemical and allied industries involve the storage and conveyancing of granular material, the physics of which is still not particularly well understood. Whilst some non-invasive techniques have been developed, much experimental work unfortunately interferes with the fields being investigated. For this reason and in conjunction with increasing computing power, there has been an increase in simulation based studies. Granular dynamics simulations, being based upon inter-particle interaction laws, give the potential to investigate assemblies at the "micro-level" and have been successful in modelling process conditions in a number of granular flow situations. To date, most analyses of these simulations are essentially static in nature involving "time snapshots". However, in a granular dynamics simulation there is a wealth of data available on a time referenced basis which has the potential to allow a quantitative analysis of the dynamics of assembly evolution. This dissertation describes the development and application of a toolkit for postsimulation analysis. However, the utilities within the toolkit would be equally applicable to large experimental data sets should such data sets exist. The application of the toolset focuses largely on the dynamics of heap evolution in both 2D and 3D with some supportive 3D work on hopper discharge. A major part of the work involves the application of time series techniques (including the wavelet transform) in the context of variable coupling during avalanching. Segregation by self-diffusion receives particular attention and a new mechanism is proposed by which segregation by particle size takes place in the boundary layer of a low impact feed heap displaying a clear velocity gradient during discrete avalanching. Periodic lateral surging is shown to enforce mixing for a high impact feed, a phenomenon which appears to switch off below a certain feed impact. Segregation by self-diffusion is also shown to take place with the conical section of a 3D discharging hopper (in the presence of a velocity gradient) which is in agreement with experimental studies. In the context of the discrete defining events which characterise the evolution of a granular assembly, the discrete wavelet transform is shown to be capable of identifying "time constants" in the absence of real periodicity. A flexible colour coded display capability (for both 2D and 3D) is shown to be helpful in investigating the dynamics in conjunction with the time series methods developed.

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Ouafdel, Hamza. "Numerical simulations of granular assemblies with three-dimensional ellipsoid-shaped particles". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0011/NQ32850.pdf.

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El, Khatib Wael. "Boundary Conditions for Granular Flows at Penetrable Vibrating Surfaces: Applications to Inclined Flows of Monosized Assemblies and to Sieving of Binary Mixtures". Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/186.

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The purpose of this work is to study the effects of boundaries on granular flows down vibrating inclines, on segregation in granular mixtures induced by boundary vibrations, and on flows of granular mixtures through vibrating sieves. In each case, we employ techniques borrowed from the kinetic theory to derive an appropriate set of boundary conditions, and combine them with existing flow theories to calculate the profiles of solid volume fraction, mean velocity, and granular temperature throughout the flows. The boundaries vibrate with full three-dimensional anisotropy in a manner that can be related to their amplitudes, frequencies, and phase angles in three independent directions. At impenetrable surfaces (such as those on the inclines), the conditions derived ensure that momentum and energy are each balanced at the boundary. At penetrable surfaces (such as sieves), the conditions also ensure that mass is balanced at the boundary. In these cases, the momentum and energy balances also are modified to account for particle transport through the boundary. Particular interest in all the applications considered here is in how the details of the boundary geometry and the nature of its vibratory motion affect the resulting flows. In one case, we derive conditions that apply to a monosized granular material that interacts with a bumpy, vibrating, impenetrable boundary, and predict how such boundaries affect steady, fully developed unconfined inclined flows. Results indicate that the flows can be significantly enhanced by increasing the total energy of vibration and are more effectively enhanced by normal vibration than by tangential vibration. Regardless of the direction of vibration, the bumpiness of the boundary has a profound effect on the flows. In a second case, we derive conditions that apply to a binary granular mixture that interacts with a flat, vibrating, penetrable sieve-like boundary, and predict how such boundaries affect the process in which the particles pass through the sieve. In the special case in which the particles are all the same size, the results make clear that energy is more effectively transmitted to the assemblies when either the total vibrational energy or the normal component of the vibrational energy is increased, but that an increase in the energy transferred to the material can sometimes actually decrease the flow rates through the sieve. Consequently, at any instant of time in the sieving process, there is an optimum level of vibrational energy that will maximize the flow rate. For the sieving of binary granular assemblies, the physics associated with the effects of energy transfer on the flow rates still applies. However, in these cases, the flows through the sieve are also profoundly affected by segregation that occurs while the particles reside on sieve before the pass through. For this reason, we also isolate the segregation process from the sieving process by considering the special case in which the holes in the vibrating sieve are too small to allow any particles to pass through. In this case, the results show that under most circumstances the region immediately adjacent to the vibrating surface will be populated almost entirely by the smaller particles or by the more dissipative particles if there is no size disparity, and that the reverse is true in a second region above the first.

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Bondzic, Sasa. "Comb-shaped supramolecules phase behavior, shear alignment and application /". [S.l. : [Groningen : s.n.] ; University Library Groningen] [Host], 2007. http://irs.ub.rug.nl/ppn/301104026.

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Le, Dantec Nicolas. "A study of saturated granular assemblages and its implications for transport, stress propagation and failure in marine sediments". Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3369001.

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Thesis (Ph. D.)--University of California, San Diego, 2009.
Title from first page of PDF file (viewed September 16, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.

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Pecol, Philippe. "Modélisation 2D discrète du mouvement des piétons : application à l'évacuation des structures du génie civil et à l'interaction foule-passerelle". Phd thesis, Université Paris-Est, 2011. http://pastel.archives-ouvertes.fr/pastel-00674774.

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Développer un modèle de mouvement de foule capable de simuler l'évacuation d'un lieu public de moyenne ou forte affluence devient utile, voire nécessaire, afin que les futures constructions ou aménagements publics puissent offrir une qualité de sécurité optimale à leurs usagers. Les effets des piétons sur les structures du génie civil, comme l'interaction dynamique foule-structure, doivent aussi être pris en compte et modélisés. Dans le cadre de cette thèse, un modèle de foule 2D discret est proposé dans lequel les actions et les décisions de chaque piéton sont traitées individuellement. Ce modèle est aussi capable de modéliser le chargement dynamique d'un piéton sur une structure vibrante. Trois étapes sont nécessaires à l'établissement du modèle proposé. La première concerne la gestion du mouvement et des interactions piéton-piéton et piéton-obstacle. Nous nous sommes inspirés des milieux granulaires pour modéliser les interactions au sein de la foule. Nous avons étudié, implémenté et adapté dans l'environnement MATLAB, le modèle granulaire proposé par Frémond, entrant dans un cadre thermodynamique rigoureux dans lequel les interactions locales sont gérées par l'utilisation de pseudo-potentiels de dissipation, et dans lequel les collisions entre particules peuvent être élastiques ou inélastiques. Une comparaison de ce modèle à deux autres approches déjà adaptées aux mouvements de foule est présentée.La seconde étape consiste à gérer le comportement des piétons. Cette gestion du comportement se fait en plusieurs niveaux de complexité. Dans le premier niveau qui est nécessaire, une stratégie de déplacement est affectée à chaque piéton. La stratégie du chemin le plus court pour qu'un piéton se déplace d'un lieu à un autre a été choisie. Elle a été implémentée à l'aide d'un algorithme de Fast Marching et utilisée pour obtenir la direction souhaitée de chaque piéton au cours du temps. Les autres niveaux de complexité permettent de décrire des comportements plus élaborés tels que l'évitement entre piétons ou le déplacement en sous-groupe, grâce à l'introduction de forces sociales. Une approche originale permettant de former des sous-groupes de piétons à l'aide d'un pseudo-potentiel de dissipation est proposée. La dernière étape concerne le couplage piéton-structure, nous avons cherché à modéliser le chargement dynamique d'un piéton sur une structure vibrante. L'action du piéton sur le sol a été représentée par une force sinusoïdale qui modélise le mouvement d'oscillation de l'individu pendant la marche. En fixant notre attention sur les passerelles, on s'est intéressé au phénomène de synchronisation en fréquence qui peut apparaître entre la fréquence de marche de chaque piéton et la fréquence d'oscillation du système "foule-passerelle". Ce phénomène a été modélisé grâce à l'utilisation d'une équation différentielle de type Kuramoto qui gère la phase de la force de marche de chaque piéton. Un développement analytique du modèle proposé permet d'obtenir les expressions de certains paramètres liés à la synchronisation. Des simulations numériques appliquent ce modèle de foule à l'évacuation des structures du génie civil et à l'interaction foule-passerelle

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Welker, Philipp [Verfasser]. "Failure of granular assemblies / vorgelegt von Philipp Welker". 2011. http://d-nb.info/1012004600/34.

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Liu, Jian-hon, i 劉建宏. "Numerical simulations for granular assemblies with 3D ellipsoidal particles". Thesis, 1998. http://ndltd.ncl.edu.tw/handle/93718740981876971473.

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碩士
國立中央大學
土木工程學系
86
In this thesis, a new algorithm and a computer program are developed for 3D numerical simulations of granular assemblies composed of ellipsoidal particles of different a/b aspect ratios. Each ellipsoidal particle is approximated by the revolution of an ellipse, formed by for connected arcs, about the major axis passing through its centroid. Coordinates of the centroid, direction of the major axis and lengths of major and minor axes are the essential data for the packing generation and associated contact detection. The domain to be filled with particles can be a polyhedron of any shape.New contact detection algorithms which obeying the no inter-penetrationkinematics of solid bodies for any two ellipsoids in the packing space were developed. There algorithms are simple but can effectively determine the contact condition and the contact point without solving the simultaneous equations of two ellipsoidal surfaces. By given boundaries of the packing domain, numbers and geometrical information of particles to be generated, the packing location of each particles and the coordinates of contact points together with three dimensional packing graphs can be generated as the outputs.

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Lin, Cha-Hom, i 林佳宏. "Numerical Simulations for Granular Assemblies with Mixed 3D Ridge Body". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/u68x86.

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碩士
國立中央大學
土木工程研究所
94
The stone or sand particle are full of different forms in the nature. There are angle or spherical particles . The two particles often mix in the nature or apply to engineer .For example in the concrete is mixed , mix materials always mix angle and spherical particles. Forefather who use contact types are categorized by contacts of vertex-to-face and edge-to-edge only write 3-D polyhedral blocks program. And ever develop granular assemblies with mixed ellipsoidal particles program. In this research, we assemblies two programs.Add ellipsoidal and polyhedral contact detection let can simulate mixed 3D ridge body In the study, we add ellipsoid and polyhedron contact method. we use the ellipsoid with four arcs. First ,we determine which arcs will contact polyhedron. If polyhedron may touch with the sphere ,we determine contact or not which use comparing distance of contact point to sphere center and radius of sphere . If polyhedron may touch with the arc face , we compare distance of contact point to arcs face center and radius of arcs face. We use this kinds of method in order contact detection : (1) vertices (2 ) edges (3) planes , but edges contact must check contact point in the edge line or not. In the planes contact must check contact point in the planes range. Finish correctional program, we simulate contact include: (1) planes (2 ) edges (3)vertices contact prove . And simulate freely falling body and contact test.After confirming , we use program to simulate simple shear test and gyroscope motion.

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Lin, Sheng-Hung, i 林昇鴻. "Numerical Simulations for Granular Assemblies with 3D Egg-shaped Particles". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/gq4p38.

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碩士
國立中央大學
土木工程研究所
94
In this thesis, a new algorithm and a computer code are developed for 3D numerical simulations of granular assemblies composed of egg-shaped particles, ellipsoidal particles and long ellipsoidal particles. The newly developed egg-shaped particles are designed by the revolution of an ellipse, formed by four connected arcs, about the major axis passing through its centroid in order to speed up the process of algorithm. Coordinates of the centroid, directions of the major axis and lengths of major and minor axes are the essential data for the packing generation and associated contact detection. The domain to be filled with particles can be a polyhedron of any shape. Simulation results can be processed by MATLAB 7.1 to display the distribution of particles in space and the fabric structure at any instant. Parameter studies of the influence of the void ration, the contact numbers among the gravels, particle shape and the internal friction angle between particles on the macroscopic behaviors of particles assemblies are conducted in this thesis. In this study, it emphasizes the relationship between the angle of repose and the particle shape. The reactions of angle of repose are taken account by the relative particle shape through remove one side of wall and set a wall spinning slowly into 90 degree. It is found that the particle shape will influence the angle of repose, ellipsoidal particles are the most, and then egg-shaped particles and the long ellipsoidal particles are the least.

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Części książek na temat "Granular Assemblies"

Goddard, J. D. "Continuum Modeling of Granular Assemblies". W Physics of Dry Granular Media, 1–24. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-2653-5_1.

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Bagi, K., i A. Vásárhelyi. "Statistical Characterization of Granular Assemblies". W Lecture Notes in Economics and Mathematical Systems, 177–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-88272-2_10.

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Misra, Anil. "Particle Kinematics in Sheared Rod Assemblies". W Physics of Dry Granular Media, 261–66. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-2653-5_18.

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Thompson, P. A. "Vibrated Granular Assemblies: Fluidization and Convection". W Springer Proceedings in Physics, 31–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78448-4_4.

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Adams, M. J., i B. J. Briscoe. "Deterministic Micromechanical Modelling of Failure or Flow in Discrete Planes of Densely Packed Particle Assemblies: Introductory Principles". W Granular Matter, 259–91. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4612-4290-1_8.

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Anandarajah, A. "Numerical Analysis of Clay Particle Assemblies". W IUTAM Symposium on Mechanics of Granular and Porous Materials, 203–13. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5520-5_19.

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Herminghaus, Stephan, Ciro Semprebon i Martin Brinkmann. "Capillary Interaction in Wet Granular Assemblies: Part 1". W Particles in Contact, 239–75. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15899-6_8.

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Wittel, Falk K., Roman Mani, Konstantin Melnikov, Filippo Bianchi i Hans J. Herrmann. "Capillary Interaction in Wet Granular Assemblies: Part 2". W Particles in Contact, 277–309. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15899-6_9.

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Li, Xia. "From Internal Structure to Constitutive Modeling of Granular Assemblies". W Springer Series in Geomechanics and Geoengineering, 577–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32814-5_78.

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de Jong, G. De Josselin. "The double sliding, free rotating model for granular assemblies". W Soil Mechanics and Transport in Porous Media, 19–27. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/978-1-4020-3629-3_4.

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Streszczenia konferencji na temat "Granular Assemblies"

Welker, Philipp, Sean McNamara, Masami Nakagawa i Stefan Luding. "Failure in small granular assemblies". W POWDERS AND GRAINS 2009: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MICROMECHANICS OF GRANULAR MEDIA. AIP, 2009. http://dx.doi.org/10.1063/1.3179915.

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Russell, Adrian, David Muir Wood, Mamoru Kikumoto, Masami Nakagawa i Stefan Luding. "Particle Crushing in Granular Assemblies". W POWDERS AND GRAINS 2009: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MICROMECHANICS OF GRANULAR MEDIA. AIP, 2009. http://dx.doi.org/10.1063/1.3180069.

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Evans, T. Matthew, i Colin B. Brown. "Microstates and Macrostructures for Granular Assemblies". W Geo-Congress 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413272.277.

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Buscarnera, G., i I. Einav. "Modelling Particle Breakage in Unsaturated Granular Assemblies". W Fifth Biot Conference on Poromechanics. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412992.167.

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Tutumluer, E., H. Huang, Y. M. A. Hashash, J. Ghaboussi, Glaucio H. Paulino, Marek-Jerzy Pindera, Robert H. Dodds, Fernando A. Rochinha, Eshan Dave i Linfeng Chen. "Imaging Based Discrete Element Modeling of Granular Assemblies". W MULTISCALE AND FUNCTIONALLY GRADED MATERIALS 2006. AIP, 2008. http://dx.doi.org/10.1063/1.2896837.

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Wang, Linbing, Emir Macari i Eyassu Woldesenbet. "New Micromechanics Formulations for the Assessment of Elastic Moduli of Granular Assemblies". W ASME 2002 Engineering Technology Conference on Energy. ASMEDC, 2002. http://dx.doi.org/10.1115/etce2002/ot-29019.

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The elastic moduli of granular assemblies are sensitive to the confining conditions as well as the volume fractions of each of its constituents (i.e. solid, fluid, gas). Theoretical estimations using granular mechanics are based on assumed distributions of contact normals and branch vectors using idealized particle shapes and therefore cannot quantitatively predict the moduli. This paper presents a new method to use the moduli of the granular skeleton and those of the matrix to estimate the moduli of the composite and makes it possible to back-calculate the moduli of the skeleton from the moduli of the composite and the matrix.

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N., Kumara, i Luding S. "Is there Shear Jamming in Frictionless Three Dimensional Granular Assemblies?" W 5th Asian Particle Technology Symposium. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-2518-1_059.

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Xuan, Guangtao, Mirko Ebert, Simson Julian Rodrigues, Christian Lessig, Nicole Vorhauer-Huget i Benoît Fond. "Temperature distribution in granular assemblies using luminescence thermometry and radiative transfer simulation". W Laser Applications to Chemical, Security and Environmental Analysis. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/lacsea.2022.lth4e.4.

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An optical method for multi-point temperature measurements inside granular assemblies is proposed. Signals originating from distinct thermographic phosphor-coated particles exiting the bed are separated using a linear least square method.

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Lumay, Geoffroy, Jorge Fiscina, Francois Ludewig i Nicolas Vandewalle. "Influence of cohesive forces on the macroscopic properties of granular assemblies". W POWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. AIP, 2013. http://dx.doi.org/10.1063/1.4812101.

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Fu, Pengcheng, i Yannis F. Dafalias. "Global and Local Mechanical-Fabric Measurements in Granular Assemblies Using DEM". W GeoCongress 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412121.108.

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Raporty organizacyjne na temat "Granular Assemblies"

Sundaresan, Sankaran, Gabriel I. Tardos i Shankar Subramaniam. Rheological Behavior of Dense Assemblies of Granular Materials. Office of Scientific and Technical Information (OSTI), marzec 2011. http://dx.doi.org/10.2172/1026503.

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Ali, Usman, Mamoru Kikumoto, Matteo Ciantia i Ying Cui. Direct observation of particle kinematics in biaxial shearing test. University of Dundee, grudzień 2021. http://dx.doi.org/10.20933/100001233.

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Biaxial shearing tests on dual-sized, 2d particle assemblies are conducted at several confining pressures. The effect of particle angularity, an important mesoscale shape descriptor, is investigated at the macro and micro levels. Macroscopically, it is observed that assemblies composed of angular particles exhibit higher strengths and dilations. The difference observed in bulk behavior due to particle angularity can be explained reasonably by considering particle-level mechanisms. A novel 2D image analysis technique is employed to estimate particle kinematics. Particle rotation results to be a key mechanism strongly influenced by particle shape determining the overall granular behavior. Unlike circular particles, angular ones are more resistant to rotations due to stronger interlocking and consequently exhibit higher strengths.

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Alonso-Robisco, Andrés, José Manuel Carbó i José Manuel Carbó. Machine Learning methods in climate finance: a systematic review. Madrid: Banco de España, luty 2023. http://dx.doi.org/10.53479/29594.

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Preventing the materialization of climate change is one of the main challenges of our time. The involvement of the financial sector is a fundamental pillar in this task, which has led to the emergence of a new field in the literature, climate finance. In turn, the use of Machine Learning (ML) as a tool to analyze climate finance is on the rise, due to the need to use big data to collect new climate-related information and model complex non-linear relationships. Considering the proliferation of articles in this field, and the potential for the use of ML, we propose a review of the academic literature to assess how ML is enabling climate finance to scale up. The main contribution of this paper is to provide a structure of application domains in a highly fragmented research field, aiming to spur further innovative work from ML experts. To pursue this objective, first we perform a systematic search of three scientific databases to assemble a corpus of relevant studies. Using topic modeling (Latent Dirichlet Allocation) we uncover representative thematic clusters. This allows us to statistically identify seven granular areas where ML is playing a significant role in climate finance literature: natural hazards, biodiversity, agricultural risk, carbon markets, energy economics, ESG factors & investing, and climate data. Second, we perform an analysis highlighting publication trends; and thirdly, we show a breakdown of ML methods applied by research area.

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