Relevant bibliographies by topics / Dimension particule

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Academic literature on the topic 'Dimension particule'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 May 2022

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Journal articles on the topic "Dimension particule"

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Humbert-Droz, Julie, and Aurélie Picton. "Du Higgs à la particule de Dieu : une analyse de la variation terminologique dans un contexte de déterminologisation." SHS Web of Conferences 138 (2022): 04005. http://dx.doi.org/10.1051/shsconf/202213804005.

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Cet article propose d’alimenter la réflexion sur les fonctionnements de la variation terminologique dans un contexte de déterminologisation, en physique des particules. Les observations reposent sur une analyse outillée de deux corpus comparables, un de textes de spécialité (articles et thèses) et un de presse généraliste. Ces corpus prennent également en compte la dimension diachronique et couvrent la période 2003-2021. Les analyses menées mettent en évidence cinq types de fonctionnements spécifiques : les rôles de la centralité et de l’intertextualité, la place des contextes métalinguistiques, l’importance du potentiel métaphorique des variantes, ainsi que leur potentiel de créativité. Ces différents fonctionnements participent à expliquer l’utilisation de variantes des termes dans la presse, et la manière dont elles contribuent au processus de déterminologisation.
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MELCION, J. P. "La granulométrie de l’aliment : principe, mesure et obtention." INRAE Productions Animales 13, no. 2 (April 18, 2000): 81–97. http://dx.doi.org/10.20870/productions-animales.2000.13.2.3770.

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La granulométrie est l’étude de la distribution de la taille des particules d’une farine. C’est une caractéristique fondamentale, en relation directe avec toutes les opérations unitaires de broyage, séparation, mélange et transfert mais aussi avec les phénomènes physico-mécaniques liés à l’ingestion et au transit digestif des particules alimentaires. En raison de la forme irrégulière des particules, le résultat de la mesure est exprimé par le diamètre qu’aurait la sphère théorique se comportant de la même manière que la particule considérée pour la technique utilisée. Une telle sphère est appelée sphère équivalente. La distribution de ces sphères est ajustée ensuite sur des lois théoriques dans différentes échelles de dimension. La finesse de la farine est caractérisée alors par un paramètre de position (le diamètre médian ou le diamètre moyen), et l’hétérogénéité granulométrique par un paramètre de dispersion (l’étendue ou l’écart type). Les principales techniques utilisées sont le tamisage, à sec ou en milieu liquide, la diffraction de la lumière laser, l’imagerie. Ces deux dernières sont rapides, non destructives et peuvent être montées en ligne. La granulométrie est fonction de la texture et de l’humidité des matières premières à broyer. Elle peut être modulée en agissant sur les paramètres des broyeurs ou des séparateurs en fonction des applications souhaitées.
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Sambou, Diomba. "Résonances près de seuils d'opérateurs magnétiques de Pauli et de Dirac." Canadian Journal of Mathematics 65, no. 5 (October 1, 2013): 1095–124. http://dx.doi.org/10.4153/cjm-2012-057-7.

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RésuméNous considérons les perturbations H := H0 + V et D := D0 + V des Hamiltoniens libres H0 de Pauli et D0 de Dirac en dimension 3 avec champ magnétique non constant, V étant un potentiel électrique qui décroıt super-exponentiellement dans la direction du champ magnétique. Nous montrons que dans des espaces de Banach appropriés, les résolvantes de H et D définies sur le demi-plan supérieur admettent des prolongements méromorphes. Nous définissons les résonances de H et D comme étant les pôles de ces extensions méromorphes. D’une part, nous étudions la répartition des résonances de H prés de l’origine 0 et d’autre part, celle des résonances de D près de ±m o ùm est la masse d’une particule. Dans les deux cas, nous obtenons d’abord des majorations du nombre de résonances dans de petits domaines au voisinage de 0 et ±m. Sous des hypothèses supplémentaires, nous obtenons des développements asymptotiques du nombre de résonances qui entraınent leur accumulation près des seuils 0 et ±m. En particulier, pour une perturbation V de signe défini, nous obtenons des informations sur la répartition des valeurs propres de H et D près de 0 et ±m respectivement.
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Тюльпанова, Екатерина, Ekaterina Tyulpanova, Дмитрий Мельников, Dmitriy Melnikov, Надежда Кавешникова, Nadejda Kaveshnikova, Юрий Голубенко, Yuriy Golubenko, Елизавета Калёнова, and Elizaveta Kalyonova. "Irradiation condition impact upon nano-particle parameters obtained through method of laser ablation in liquid." Science intensive technologies in mechanical engineering 2018, no. 6 (May 30, 2018): 3–6. http://dx.doi.org/10.30987/article_5b0e4111a4af99.94656008.

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The investigation results of the repeated irradiation impact of silver nano-particles upon their dimensions are shown. In particular, the attention is paid to the particles with dimensions from 10 to 40nm. As a result of the researches there were defined the regularities in dimension changes of particles at different degrees of irradiation. These results may be used for the development of strategies in nano-particle dimension control, which is significant for the laser synthesis method from the point of view of its competitive ability with chemical methods.
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Han, Hongxing, Yun Ma, Wei He, Weifang Yang, and Xudong Fu. "Numerical Simulation of Rockfill Materials Based on Fractal Theory." Applied Sciences 12, no. 1 (December 29, 2021): 289. http://dx.doi.org/10.3390/app12010289.

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With the use of the particle flow code in two dimensions, a fractal model is established with the number of particles of different particle fractions used as the statistics to study the fractal characteristics of particle size distribution. Numerically simulated specimens obtained by four scale methods are subjected to the relative density test and the biaxial compression test to explore the influences of fractal dimension D on the macroscopic and mesomechanical properties of specimens, as well as to study the relationship between fractal dimension D and different mechanical performance indexes. Results show that the particle size distribution of each of the four groups after scale exhibits fractal characteristics, with the fractal dimension D ranging from 1.27 to 2.03. The number of fine particles in the specimen increases with the fractal dimension D, the particle aggregates become more compact, the macroscopic mechanical properties of the specimens are improved, and a linear relationship exists between the fractal dimension D and different mechanical performance indexes. A large fractal dimension D corresponds to a great mesoparticle coordination number.
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DILKES, F. A., and D. G. C. McKEON. "THE SUPERCONFORMAL PARTICLE." International Journal of Modern Physics A 14, no. 05 (February 20, 1999): 761–67. http://dx.doi.org/10.1142/s0217751x99000373.

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By considering N=2 superconformal algebra in d=2 dimensions, we construct an N=2 superconformal algebra in d=1 dimension. An N=1 superconformally invariant action for a particle is constructed. It is not what is obtained by dimensional reduction of the action for a superconformally invariant string.
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Crane, Edward, Sean Ledger, and Bálint Tóth. "Diffusion and Superdiffusion in Lattice Models for Colliding Particles with Stored Momentum." Journal of Statistical Physics 177, no. 6 (November 7, 2019): 1240–62. http://dx.doi.org/10.1007/s10955-019-02419-9.

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Abstract We introduce two discrete models of a collection of colliding particles with stored momentum and study the asymptotic growth of the mean-square displacement of an active particle. We prove that the models are superdiffusive in one dimension (with power law correction) and diffusive in three and higher dimensions. In two dimensions we demonstrate superdiffusivity (with logarithmic correction) for certain anisotropic initial conditions.
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BACCHI, O. O. S., K. REICHARDT, and N. A. VILLA NOVA. "FRACTAL SCALING OF PARTICLE AND PORE SIZE DISTRIBUTIONS AND ITS RELATION TO SOIL HYDRAULIC CONDUCTIVITY." Scientia Agricola 53, no. 2-3 (May 1996): 356. http://dx.doi.org/10.1590/s0103-90161996000200027.

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Fractal scaling has been applied to soils, both for void and solid phases, as an approach to characterize the porous arrangement, attempting to relate particle-size distribution to soil water retention and soil water dynamic properties. One important point of such an analysis is the assumption that the void space geometry of soils reflects its solid phase geometry, taking into account that soil pores are lined by the full range of particles, and that their fractal dimension, which expresses their tortuosity, could be evaluated by the fractal scaling of particle-size distribution. Other authors already concluded that although fractal scaling plays an important role in soil water retention and porosity, particle-size distribution alone is not sufficient to evaluate the fractal structure of porosity. It is also recommended to examine the relationship between fractal properties of solids and of voids, and in some special cases, look for an equivalence of both fractal dimensions. In the present paper data of 42 soil samples were analyzed in order to compare fractal dimensions of pore-size distribution, evaluated by soil water retention curves (SWRC) of soils, with fractal dimensions of soil particle-size distributions (PSD), taking the hydraulic conductivity as a standard variable for the comparison, due to its relation to tortuosity. A new procedure is proposed to evaluate the fractal dimension of pore-size distribution. Results indicate a better correlation between fractal dimensions of pore-size distribution and the hydraulic conductivity for this set of soils, showing that for most of the soils analyzed there is no equivalence of both fractal dimensions. For most of these soils the fractal dimension of particle-size distribution does not indicate properly the pore trace tortuosity. A better equivalence of both fractal dimensions was found for sandy soils.
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Kuśnierz, Magdalena, and Paweł Wiercik. "Analysis of particle size and fractal dimensions of suspensions contained in raw sewage, treated sewage and activated sludge." Archives of Environmental Protection 42, no. 3 (September 1, 2016): 67–76. http://dx.doi.org/10.1515/aep-2016-0031.

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Abstract The analysis of particle size in suspensions carried out with use of the laser diffraction method enables us to obtain not only information about the size of particles, but also about their properties, shape and spatial structure, determined basing on fractal dimension. The fractal dimension permits the evaluation of the interior of aggregates, at the same time showing the degree of complexity of the matter. In literature, much attention is paid to the evaluation of the fractal dimension of flocs in activated sludge, in the aspect of control of single processes, i.e. sedimentation, dehydration, coagulation or flocculation. However, results of research concerning the size of particles and the structure of suspensions existing in raw and treated sewage are still lacking. The study presents optical fractal dimensions D3 and particle size distributions measured with use of laser granulometer in raw and treated sewage and activated sludge collected from six mechanical-biological wastewater treatment plants located in the Lower Silesian region. The obtained test results demonstrate that wastewater treatment plants that use both sequencing batch reactors and continuous flow reactors are more efficient at capturing suspension particles of a size up to 30 μm and are characterized by an increased removal of particles of a size ranging from 30 μm to 550 μm to the outflow. Additionally, in the case of samples of treated sewage and activated sludge collected at the same location, at short intervals, similar particle distributions were observed. As far as the analysis of fractal dimensions is concerned, particles contained in the raw sewage suspension were characterized by the lowest values of the fractal dimension (median equals 1.89), while the highest values occurred in particles of activated sludge (median equals 2.18). This proves that the spatial structure of suspension particles contained in raw sewage was similar to a linear structure, with a large amount of open spaces, while the structure of particles contained in the activated sludge suspension was significantly more complex in the spatial aspect.
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Myjak, Józef. "Some typical properties of dimensions of sets and measures." Abstract and Applied Analysis 2005, no. 3 (2005): 239–54. http://dx.doi.org/10.1155/aaa.2005.239.

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This paper contains a review of recent results concerning typical properties of dimensions of sets and dimensions of measures. In particular, we are interested in the Hausdorff dimension, box dimension, and packing dimension of sets and in the Hausdorff dimension, box dimension, correlation dimension, concentration dimension, and local dimension of measures.
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Dissertations / Theses on the topic "Dimension particule"

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Boyaval, Stéphane. "Etude de la granulométrie des sprays produits par des injecteurs à swirl destinés à l'injection directe essence : mesures et application du formalisme d'entropie maximum." Rouen, 2000. http://www.theses.fr/2000ROUES062.

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Ce mémoire présente les travaux conduits sur une série d'injecteurs à « Swirl » haute pression d'injection destinés à l'injection directe essence (IDE). Cette étude a été menée en fonctionnement stationnaire et instationnaire. Un aspect important du travail a été la mise au point d'une technique originale pour corriger l'effet de la diffraction multiple sur les distributions de taille mesurées avec un granuloèetre « Malvern » Cette procédure a permis d'étudier les caractéristiques granulométriques dans une zone proche du nez de l'injecteur. Des facteurs de correction appliqués soit aux caractéristiques de la distribution volumique, soit aux intensités diffractées sont définis. Un autre point consiste à utiliser le formalisme d'entropie maximum (MEF) pour la détermination des distributions de taille. On obtient un bon accord entre les distributions de taille expérimentales, corrigées à partir des facteurs de correction, et les distributions calculées. De ces travaux, il ressort que le diamètre moyen d 4 3 moyenne arithmétique de la distribution volumique et le facteur de largeur relatif V sont des caractéristiques importantes de la distribution volumique. Un dernier aspect permet de déterminer des caractéristiques locales de taille à partir du développement d'une méthode originale de déconvolution des mesures « Malvern ». Les premiers résultats indiquent des comportements cohérents sur l'évolution radiale des caractéristiques locales de la distribution volumique. On constate que la phase d'ouverture de l'injecteur est un point critique du fonctionnement des injecteurs IDE. L'étude conduite permet d'identifier de façon assez complète l'influence de la pression d'injection et de la géométrie de l'injecteur sur les caractéristiques de fonctionnement de ces systèmes d'injection, en particulier de faire le point sur l'importance du pré-spray. Ce travail a mis en évidence des comportements importants que l'optimisation du procédé IDE devrait prendre en considération.
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Bouillot, Jean-Louis. "Etude de suspensions bidimensionnelles par une methode d'analyse d'images : statistique et geometrie des amas." Aix-Marseille 1, 1987. http://www.theses.fr/1987AIX11081.

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Ranguis-Barale, Isabelle. "Étude de la fragmentation ultrafine : application au broyage de la gibbsite par broyeur à jets d'air." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL062N.

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Ce travail a pour objectif de caractériser la fragmentation ultrafine. L’étude est réalisée avec un broyeur à jets d'air dans lequel les particules mises en mouvement par insufflation d'air comprimé entrent violemment en collision. Le matériau réalisé, de la gibbsite Al(OH)3 obtenue industriellement à partir de la bauxite, se présente sous la forme de grains polycristallins complexes de taille moyenne égale à 100 microns. Une méthode d'étude originale basée sur l'analyse des courbes granulométriques couplée à l'analyse morphologique a permis de montrer que la fragmentation s'opère selon trois mécanismes: l'éclatement, l'écaillage et l'attrition. Il en résulte trois populations granulométriques dont les tailles moyennes sont 75, 20 et 7 microns composés par quatre types morphologiques, les blocs compacts, les éclats, les écailles et les fines. En comparant les résultats obtenus dans un broyeur à jets d'air à ceux obtenus par compression dans un broyeur annulaire et par compression-cisaillement dans un broyeur vibroinertiel, on constate que les produits ont une morphologie identique bien que les répartitions pondérales varient avec le type de broyage. On conclut que la structure du matériau joue un rôle déterminant dans la fragmentation
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Lartiges, Bruno. "Déstabilisation d'une suspension de silice colloïdale par un sel d'aluminium : relations entre les phénomènes de surface, la structure et la granulométrie des flocs." Vandoeuvre-les-Nancy, INPL, 1994. http://docnum.univ-lorraine.fr/public/INPL_T_1994_LARTIGES_B_S.pdf.

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Cette étude présente les résultats obtenus avec des suspensions de silice colloïdale floculées par un sel d'aluminium hydrolyse, le Wac HB, dans différentes conditions de mélange, pH, et concentration en floculant. La RMN de 27Al est utilisée pour définir la nature de la relation floculant/particule de silice, la structure des agrégats formes est caractérisée par diffusion des rayons X aux petits angles et par diffusion de la lumière, et la taille des flocs est mesurée par diffraction de Fraunhofer. On montre que la déstabilisation de la silice par un sel d'aluminium hydrolyse s'accompagne de la formation de sites aluminosilicates superficiels chargés négativement. La présence de ces sites suppose qu'une partie des polycations Al se soient dépolymérisés au contact de la silice, et implique qu'ils servent de point d'ancrage potentiel pour les espèces floculantes. Cette consommation d'aluminium par la surface de la silice contrôle l'organisation de la structure des agrégats, d'une part en limitant le nombre de polycations Al à l'origine des ponts interparticulaires, et d'autre part en déterminant une probabilité de collage des amas voisine de zéro. Le résultat de cette double influence est une augmentation progressive de la dimension fractale des flocs de silice avec la concentration en aluminium jusqu'a la valeur maximale de 2,1 qui caractérise une agrégation d'amas limitée par l'adhésion. La croissance des agrégats s'effectue sous la forme d'une répartition en taille monomodale qui se scinde par la suite en une, deux ou trois populations de flocs suivant la concentration en floculant et l'intensité de l'agitation ; la mise en place de ces distributions granulométriques multimodales est attribuée à la coexistence des phénomènes de croissance et de désagrégation au sein de la suspension
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CHERRE, JEAN-PIERRE. "Contribution a l'etude de la production de poudres metalliques par atomisation centrifuge de metal ou alliage liquides." Clermont-Ferrand 2, 1989. http://www.theses.fr/1989CLF2D217.

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Etude de la formation de gouttelettes par atomisation centrifuge dans le cas de l'eutectique bismuth-etain. On montre que pour 25% environ de la poudre produite, la taille des particules spheriques peut etre prevue sur la base d'un mecanisme de centrifugation pure. Mise en evidence qualitative de l'effet des chocs entre particules et de l'effet de l'erosion aerodynamique du metal liquide s'ecoulant sur le disque
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Onofri, Fabrice. "Prise en compte de la dimension finie des faisceaux d'éclairage en granulométrie optique : anémométrie phase Doppler. diagnostics des milieux diphasiques." Phd thesis, Université de Rouen, 1995. http://tel.archives-ouvertes.fr/tel-00287923.

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Le diagnostic par une méthode optique telle que l'anémométrie phase Doppler, des particules présentes dans les milieux diphasiques, nécessite l'emploi de faisceaux laser focalisés. La compréhension et l'élimination des effets engendrés sur les mesures de taille, par les gradients d'éclairage ou les « effets de trajectoire », est au centre de la première partie de cette thèse. Différentes solutions, testées numériquement et expérimentalement, sont proposées pour éliminer les biais constatés. L'extension de l'anémométrie phase Doppler à la mesure de la partie réelle et complexe (absorption) de l'indice de réfraction des particules est ensuite considérée. Les méthodes originales proposées autorisent, en plus des mesures de taille et de vitesse, la reconnaissance des particules par leur indice, l'étude de la coalescence de gouttes (liquides transparents ou absorbants) ou la détection des fortes variations de température de particules. La dernière partie de ce travail propose diverses solutions pour étendre l'anémomètrie phase Doppler à la mesure de particules cylindriques (fibres, jets liquides), ovoïdes (oblates/problates), sphériques non­homogènes (multicouches, à coeur, hétérogènes: diphasiques ou non) et irrégulières. Le cas des particules multicouches est particulièrement détaillé, à partir de simulations basées sur le travail théorique effectué pour étendre la théorie de Lorenz-­Mie généralisée à ce type de particules.
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Onofri, Fabrice. "Prise en compte de la dimension finie des faisceaux d'éclairage en granulométrie optique : anémométrie phase Doppler. diagnostics des milieux diphasiques." Phd thesis, Rouen, 1995. https://tel.archives-ouvertes.fr/tel-00287923.

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Le diagnostic par une méthode optique telle que l'anémométrie phase Doppler des particules présentes dans les milieux diphasiques, nécessite l'emploi de faisceaux laser focalisés. La compréhension et l'élimination des effets engendrés par les gradients d'éclairage ou effets de trajectoire sur la mesure de la taille des particules sphériques est au centre de la première partie de cette thèse. Différentes solutions, testées numériquement et expérimentalement, sont proposées pour éliminer les biais constatés. L'extension de l'anémométrie phase Doppler à la mesure de la partie réelle et complexe (absorption) de l'indice de réfraction des particules est ensuite considérée. Les méthodes originales proposées autorisent en plus des mesures de taille et de vitesse, la reconnaissance des particules par leur indice, l'étude de la coalescence de gouttes (liquides transparents ou absorbants) ou la détection des fortes variations de température des particules. La dernière partie de ce travail propose diverses solutions pour étendre l'anémométrie phase Doppler à la mesure de particules cylindriques (fibres, jets liquides), ovoïdes (oblates/problates), sphériques non homogènes (multicouches, à coeur, hétérogènes: diphasiques ou non) et irrégulières. Le cas des particules multicouches ou à coeur simple, est particulièrement détaillé, ceci à partir de simulations basées sur le travail théorique effectué pour étendre la théorie de Lorenz-Mie généralisée au cas des particules multicouches
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El, Rhess Es-Saïd. "Synthèse, mode de croissance et caractérisations physico-chimiques de microparticules monodispersés de silice dans le système SI(OC : :(2)h::(5))::(4)-nh::(3)-h::(2)o-roh." Besançon, 1988. http://www.theses.fr/1988BESA2023.

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Preparation de microparticules de silice a partir du precurseur organometallique si(oc::(2)h::(5))::(4). Etude de l'influence de la temperature et de la concentration en nh::(3) et roh sur la dimension des particules
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ROBIN, PASCAL. "Contribution a la caracterisation de l'echantillonnage de melanges granulaires en vue d'etudier les phenomenes de malaxage." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF2D213.

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Les melanges utilises en genie civil sont constitues a raison de 90 a 95**(o) en poids de particules solides dures, de dimensions comprises entre quelques microns et quelques centimetres, le pourcentage restant etant generalement un fluide. Apres definition d'un plan d'echantillonnage, l'homogeneite du melange est appreciee en analysant sa composition sur diverses parties et en comparant les compositions obtenues entre elles et/ou a une composition theorique visee. Or, les differentes phases de l'echantillonnage sont assimilables a des processus aleatoires qui introduisent des erreurs sur les teneurs en constituant. Parmi celles-ci, une seule ne s'annule jamais meme lorsque l'echantillonnage est conduit idealement : il s'agit d'une erreur intrinseque a la matiere echantillonnee. Nous avons elabore un modele probabiliste de constitution dont l'objectif est d'assigner une limite inferieure a la dispersion d'une composition granulaire. Nous presentons enfin le calage de ce modele sur une analyse experimentale par echantillonnage d'un melange granulaire, malaxe sans eau d'apport ni liant
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Zerghouni, Ahmed. "Etude des charges électriques genérées par le choc des particules sphériques sur les parois solides." Poitiers, 1988. http://www.theses.fr/1988POIT2316.

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Calcul de la charge initiale des particule et de leur vitesse au moment du choc. Analyse experimentale de l'influence de plusieurs parametres sur le processus de generation des charges : angle et vitesse d'impact, dimensions et charge initiale des particules. Evolution de la charge d'une particule en fonction du nombre de chocs. Analyse comparee du comportement de trois materiaux : cuivre, polyethylene noir, polyethylene jaune
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Books on the topic "Dimension particule"

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Particle size measurement. 5th ed. London: Chapman & Hall, 1997.

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Allen, Terence. Particle size measurement. 4th ed. London: Chapman and Hall, 1990.

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Radcliffe, Robert C. Reducing particle dimensions of chunkwood. St. Paul, Minn. (1992 Folwell Avenue, St. Paul 55108): U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1990.

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Oblak, Blagoje. BMS Particles in Three Dimensions. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61878-4.

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The tenth dimension: An informal history of high-energy physics. New York: McGraw-Hill, 1989.

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Youngquist, John. Dimensional stability of acetylated aspen flakeboard. Madison, WI: Forest Products Laboratory, 1987.

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Youngquist, John. Dimensional stability of acetylated aspen flakeboard. Madison, WI: Forest Products Laboratory, 1987.

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Youngquist, John. Dimensional stability of acetylated aspen flakeboard. Madison, WI: Forest Products Laboratory, 1987.

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Zakrzewski, W. J. Low-dimensional sigma models. Bristol, England: A. Hilger, 1989.

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Goossens, K. G. Three dimensional modelling of particle filled polymer film. Manchester: UMIST, 1994.

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Book chapters on the topic "Dimension particule"

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Marchildon, Louis. "Particle in One Dimension." In Quantum Mechanics, 71–107. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04750-7_5.

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Cini, Michele. "Particle in One Dimension." In UNITEXT for Physics, 191–206. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-71330-4_11.

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Marchildon, Louis. "Particle in Three Dimensions." In Quantum Mechanics, 127–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04750-7_7.

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Hu, Chengyu, Xuesong Yan, and Chuanfeng Li. "Particle Swarm Optimization with Dynamic Dimension Crossover for High Dimensional Problems." In Advances in Computation and Intelligence, 750–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-92137-0_82.

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Nicolai, Hermann. "Two-Dimensional Supergravities, Hidden Symmetries and Integrable Systems." In Particle Physics, 99–133. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-0977-2_3.

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Chen, Zengtao, and Cliff Butcher. "Three-Dimensional Particle Fields." In Micromechanics Modelling of Ductile Fracture, 201–21. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6098-1_8.

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Hinsch, Klaus D. "Three-Dimensional Particle Velocimetry." In Optical Diagnostics for Flow Processes, 303–18. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1271-8_15.

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Hinsch, Klaus D., and Heiko Hinrichs. "Three-Dimensional Particle Velocimetry." In Three-Dimensional Velocity and Vorticity Measuring and Image Analysis Techniques, 129–52. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8727-3_6.

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Brandt, Siegmund, Hans Dieter Dahmen, and Tilo Stroh. "Free Particle Motion in One Dimension." In Interactive Quantum Mechanics, 5–31. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7424-2_2.

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Brandt, Siegmund, Hans Dieter Dahmen, and Tilo Stroh. "Free Particle Motion in One Dimension." In Interactive Quantum Mechanics, 5–23. New York, NY: Springer New York, 2003. http://dx.doi.org/10.1007/978-0-387-21653-9_2.

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Conference papers on the topic "Dimension particule"

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Dan, Bo, Sasanka Kanuparthi, Ganesh Subbarayan, and Bahgat G. Sammakia. "An Improved Network Model for Determining the Effective Thermal Conductivity of Particulate Thermal Interface Materials." In ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASMEDC, 2009. http://dx.doi.org/10.1115/interpack2009-89116.

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Thermal Interface Materials (TIMs) are particulate composite materials widely used in the microelectronics industry to reduce the thermal resistance between the device and heat sink. Predictive modeling using fundamental physical principles is critical to developing new TIMs since it can be used to quantify the effect of particle volume fraction and arrangements on the effective thermal conductivity. The existing analytical descriptions of thermal transport in particulate systems do not accurately account for the effect of inter-particle interactions, especially in the intermediate volume fractions of 30%–80%. An efficient Random Network Model (RNM) that captures the near-percolation transport in these particle-filled systems, taking into account the inter-particle interactions and random size distributions, was previously developed by the authors. The RNM is computationally efficient compared to full field simulations and was demonstrated to match to within 5% of the full field simulations and to within 15% of the experimentally measured values. The RNM approach uses a cylindrical region to approximate the thermal transport within the filler particles and to capture the inter-particle interactions. This approximation is less accurate when the polydispersivity of the particulate system increases. In the present paper, a novel semi-spherical approximation to the conductance of the fillers is presented as an alternative to the cylindrical region approximation used earlier. The new semi-spherical model is compared to the cylindrical model in two and three dimensions. In two dimensions, the semi-spherical model and the cylindrical model were compared with Finite Element Model (FEM) results. The comparison showed that the temperature distribution of the semi-spherical model matched more closely to the FEM model than the temperature distribution of the cylinder model when the radius ratio of the two particles increases. In three dimension microstructures, the semi-spherical model and the cylindrical model were compared under various volume fractions. The comparison showed that thermal conductivities of the semi-spherical model were always higher than thermal conductivities of the cylindrical model and were in better agreement with existing experimental data for particulate TIMs at 58% volume loading.
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Ouldarbi, L., H. Shen, G. Péret, S. Coëtmellec, G. Gréhan, D. Lebrun, and M. Brunel. "Simultaneous 3D location and size measurement of mixed bubbles and sand particles in a flow using interferometric particle imaging." In Digital Holography and Three-Dimensional Imaging. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/dh.2015.dth3a.2.

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Tu, J. Y., G. H. Yeoh, Y. S. Morsi, and W. Yang. "Numerical and Experimental Study of Particle Rebounding Flow Characteristics in a Gas-Particle Flow Over Curved Bodies." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45741.

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The particle rebounding characteristics of a gas–particle flow over a cylindrical body and an in-line tube bundle arrangement is investigated. With the aim of adopting both numerical and experimental approaches, the mean particulate flow patterns, comprising both incident and rebound particles resulting from the impact of particles on solid walls, are examined. Experimentally, a two-dimensional Laser-Doppler Anemometry (LDA) technique is used to measure the instantaneous incident and rebound particle velocities in the immediate vicinity of body surfaces. Computationally, the Reynolds-Averaging Navier-Stokes equations are solved for the continuum gas phase; the results are used in conjunction with a Lagrangian trajectory model to predict the particle-rebound characteristics. For a single tube model, the computational observations, also confirmed through experiment, reveal a particle rebound zone where the mean particulate flow pattern is significantly modified due to the contribution of the rebound particles during particle-wall impact interaction. For the in-line tube bundle model, particles being rebounded from the first row of tubes at upstream migrated downstream and impinged the other tubes in an extremely complex and random disposition. Analysis of the effect of the above-mentioned parameters on the rebounding particle flow characteristics has provided a better understanding on the behaviour of particulate flow impinging on curved solid wall bodies.
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Kajishima, Takeo, Katsuya Kondo, and Shintaro Takeuchi. "Numerical Simulation of Heat Transfer in Shear Flow of Liquid-Solid Two-Phase Media by Immersed Solid Approach." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-07513.

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We developed a direct numerical simulation (DNS) method of solid-fluid two-phase flows to study the effects of heat conductivity within a solid particle and the particle motion on the heat transfer. Heat transfer and particle behaviors were studied for different ratios of heat conductivity (solid to liquid) and solid volume fractions. The simulation results emphasize the effect of temperature distributions within the particles, and the heat transfer through each particle plays an important role for the motion of the particulate flow. The particle-laden flow in a two-dimensional channel of instable thermal stratification, namely hot wall at the bottom and cold wall at the top, is simulated. In the two-dimensional computation, the heat transfer attenuates by increasing the neutral conductive particles because of the resistance to the thermal convection. In case of highly conductive particles, the thermal convection and conductions are enhanced to some extent of addition but the overload of particles suddenly reduces the intensity of convection, resulting in the lower heat transfer. The inverse gradient of mean temperature is observed particularly in case of moderate loading of neutral conductive particles. It is due to the modulation of the profile of convection cells. Most of the above-mentioned findings are reproduced by the fully three-dimensional simulation.
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Fan, Jing, and Liqiu Wang. "Numerical Simulation of Thermal Conductivity of Nanofluids." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22453.

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The recent first-principle model shows a dual-phase-lagging heat conduction in nanofluids at the macroscale. The macroscopic heat-conduction behavior and the thermal conductivity of nanofluids are determined by their molecular physics and microscale physics. We examine numerically effects of particle-fluid thermal conductivity ratio, particle volume fraction, shape, aggregation, and size distribution on macroscale thermal properties for nine types of nanofluids, without considering the interfacial thermal resistance and dynamic processes on particle-fluid interfaces and particle-particle contacting surfaces. The particle radius of gyration and non-dimensional particle-fluid interfacial area in the unit cell are two very important parameters in characterizing the effect of particles’ geometrical structures on thermal conductivity of nanofluids. Nanofluids containing cross-particle networks have conductivity which practically reaches the Hashin-Shtrikman bounds. Moreover, particle aggregation influences the effective thermal conductivity only when the distance between particles is less than the particle dimension. Uniformly-sized particles are desirable for the conductivity enhancement, although to a limited extent.
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Nasseri, Forough. "Chaotic inflation with variable space dimension." In Cosmology and particle physics. AIP, 2001. http://dx.doi.org/10.1063/1.1363575.

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Kim, Young Won, and Jung Yul Yoo. "Sheath Free Three-Dimensional Particle Focusing Using Electro-Hydrodynamics." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62297.

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A conventional flow cytometry is a crucial and versatile instrument that measures the fluorescence and light scattering of individual cell and other particulate or molecular analytes in biomedical research. Recently, there have been many efforts to achieve this conventional flow cytometry on lab-on-a-chip devices powered by microfluidics. One of the key techniques of this instrument is to hydrodynamically focus samples within the sensing area of optical systems in order to optimize detection signals. Recent three-dimensional focusing methods using MEMS technology contain sheath flows with very complex channel geometries. In the present investigation, we demonstrated 3-D particle focusing in a single straight micro-capillary without sheath flows using electro-hydrodynamics. Particle beam was successfully made with a beam diameter of about 10 μm for rigid particles. Proposed device provides critical solutions for simple and innovative 3-D particle focusing method for the applications to the MEMS-based micro-flow cytometry.
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Tian, Lei, Justin Lee, and George Barbastathis. "Compressive holographic inversion of particle scattering." In Digital Holography and Three-Dimensional Imaging. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/dh.2011.dma6.

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Tian, Lei, Justin Lee, and George Barbastathis. "Compressive holographic inversion of particle scattering." In Digital Holography and Three-Dimensional Imaging. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/dh.2011.dwc27.

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Snoeyink, Craig A., Gordon Christopher, Sourav Barman, and Steve Wereley. "Sub-Diffraction Limit Three Dimensional Particle Tracking Velocimetry." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65522.

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Here we present an optical measurement technique and image analysis process capable of tracking particles in three dimensions with a single point of view. In addition to single view 3D-PTV, the optical system is capable of tracking individual particles even at particle-particle spacings that are closer then the diffraction limit of the base imaging system. The measurement system, termed Bessel Beam Microscopy (BBM), functions as an attachment for a microscope that fits between the microscope base and camera. The addition of the BBM attachment transforms the point spread function (PSF) of the microscope allowing two unique functions: single image superresolution imaging, and the extraction of three dimension location information of particles without calibration. The result is a fluid characterization tool with unique capabilities for velocimetry and characterization of the dynamics of dense fluid-particle suspensions.
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Reports on the topic "Dimension particule"

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Radcliffe, Robert C. Reducing particle dimensions of chunkwood. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station, 1990. http://dx.doi.org/10.2737/nc-rp-296.

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Friesen, W. I., and R. J. Mikula. Fractal dimensions of coal particles. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/304962.

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Hewett, JoAnne L. Particle Physics Probes of Extra Spacetime Dimensions. Office of Scientific and Technical Information (OSTI), May 2002. http://dx.doi.org/10.2172/799063.

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Smith, Douglas R. Three-Dimensional Particle Image Velocimetry System. Fort Belvoir, VA: Defense Technical Information Center, January 2003. http://dx.doi.org/10.21236/ada411006.

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Friedman, A., D. P. Grote, C. M. Celata, and J. W. Staples. Synthesizing a four-dimensional beam particle distribution frommultiple two-dimensional views. Office of Scientific and Technical Information (OSTI), February 2002. http://dx.doi.org/10.2172/881378.

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Snider, D. M., P. J. O`Rourke, and M. J. Andrews. An incompressible two-dimensional multiphase particle-in-cell model for dense particle flows. Office of Scientific and Technical Information (OSTI), June 1997. http://dx.doi.org/10.2172/510351.

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Guildenbecher, Daniel Robert, and Elise Munz Hall. Plenoptic Imaging for Three-Dimensional Particle Field Diagnostics. Office of Scientific and Technical Information (OSTI), June 2017. http://dx.doi.org/10.2172/1368165.

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Hellström, Anders. How anti-immigration views were articulated in Sweden during and after 2015. Malmö University, Malmö Institute for Studies of Migration, Diversity and Welfare (MIM), 2021. http://dx.doi.org/10.24834/isbn.9789178771936.

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The development towards the mainstreaming of extremism in European countries in the areas of immigration and integration has taken place both in policy and in discourse. The harsh policy measures that were implemented after the 2015 refugee crisis have led to a discursive shift; what is normal to say and do in the areas of immigration and integration has changed. Anti-immigration claims are today not merely articulated in the fringes of the political spectrum but more widely accepted and also, at least partly, officially sanctioned. This study investigates the anti-immigration claims, seen as (populist) appeals to the people that centre around a particular mythology of the people and that are, as such, deeply ingrained in national identity construction. The two dimensions of the populist divide are of relevance here: The horizontal dimension refers to articulated differences between "the people", who belong here, and the "non-people" (the other), who do not. The vertical dimension refers to articulated differences between the common people and the established elites. Empirically, the analysis shows how anti-immigration views embedded in processes of national myth making during and after 2015 were articulated in the socially conservative online newspaper Samtiden from 2016 to 2019. The results indicate that far-right populist discourse conveys a nostalgia for a golden age and a cohesive and homogenous collective identity, combining ideals of cultural conformism and socioeconomic fairness.
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Barry D. Ganapol. Time-Dependent Neutral Particle Transport Benchmarks in Two and Three Dimensions. Office of Scientific and Technical Information (OSTI), October 2007. http://dx.doi.org/10.2172/918692.

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W.U. Boeglin, A. L. Roquemore, and R. Maqueda. Three-dimensional Reconstruction of Dust Particle Trajectories in the NSTX. Office of Scientific and Technical Information (OSTI), March 2009. http://dx.doi.org/10.2172/950779.

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