Tesis sobre el tema "Particle dynamic"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 50 mejores tesis para su investigación sobre el tema "Particle dynamic".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
Kim, JaeMo. "Dynamic simulation of suspended particles and drops at finite Reynolds numbers by dissipative particle dynamics /". For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.
Texto completoWang, Ge 1965. "Particle modeling of dynamic fragmentation". Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102230.
Texto completoConsequently, we test this new PM by simulating fracture response of an elastic-brittle material---epoxy, with randomly distributed holes, in tension and then comparing the model results with the experiments.
Then, we use this developed PM to many applications, such as (i) simulating dynamic fragmentation of minerals encountered in comminution and blasting processes in the mining industry. In particular, we simulate single as well as multi-phase materials in two dimensions (2-D) and 3-D. We redefine the interactive particle relationship by which material impact-collision problems are realistically simulated and computational time is saved as well; (ii) investigating cracking propagation of a plate with crack-tip under mode-I loading.
Rafferty, Thomas. "Dynamic properties of condensing particle systems". Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/91746/.
Texto completoUrade, Hemlata S. y Rahila Patel. "Performance Evaluation of Dynamic Particle Swarm Optimization". IJCSN, 2012. http://hdl.handle.net/10150/283597.
Texto completoIn this paper the concept of dynamic particle swarm optimization is introduced. The dynamic PSO is different from the existing PSO’s and some local version of PSO in terms of swarm size and topology. Experiment conducted for benchmark functions of single objective optimization problem, which shows the better performance rather the basic PSO. The paper also contains the comparative analysis for Simple PSO and Dynamic PSO which shows the better result for dynamic PSO rather than simple PSO.
Devarakonda, SaiPrasanth. "Particle Swarm Optimization". University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1335827032.
Texto completoCavallo, Antonio. "Four dimensional particle tracking in biological dynamic processes". [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964904667.
Texto completoLi, Changhe. "Particle swarm optimization in stationary and dynamic environments". Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/10284.
Texto completoSharma, Samvaran. "DARTPIV : Dynamic Adaptive Real-Time Particle Image Velocimetry". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85496.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 65-67).
Particle Image Velocimetry (PIV) is a technique that allows for the detailed visualization of fluid flow. By performing computational analysis on images taken by a high-sensitivity camera that monitors the movement of laser-illuminated tracer particles over time, PIV is capable of producing a vector field describing instantaneous velocity measurements of the fluid captured in the field of view. Nearly all PIV implementations perform offline processing of the collected data, a feature that limits the scope of the applications of this technique. Recently, however, researchers have begun to explore the possibility of using FPGAs or PCs to greatly improve the efficiency of these algorithms in order to obtain real-time speeds for use in feedback loops. Such approaches are very promising and can help expand the use of PIV into previously unexplored fields, such as high performance Unmanned Aerial Vehicles (UAVs). Yet these real-time algorithms have the potential to be improved even further. This thesis outlines an approach to make real-time PIV algorithms more accurate and versatile in large part by applying principles from another emerging technique called adaptive PIV, and in doing so will also address new issues created from the conversion of traditional PIV to a real-time context. This thesis also documents the implementation of this Dynamic Adaptive Real- Time PIV (DARTPIV) algorithm on a PC with CUDA parallel computing, and its performance and results analyzed in the context of normal real-time PIV.
by Samvaran Sharma.
M. Eng.
Wu, Yadong Carleton University Dissertation Mathematics. "Dynamic particle systems and multilevel measure branching processes". Ottawa, 1991.
Buscar texto completoBao, Yanyao. "Smoothed Particle Hydrodynamics Simulations for Dynamic Capillary Interactions". Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/19592.
Texto completoSong, Yongxin. "Study of the dynamic behavior of tablet movement in a rotating drum using discrete element modeling (DEM) method". Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4681.
Texto completoTitle from document title page. Document formatted into pages; contains xi, 110 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 105-110).
Robinson, Craig David. "Particle simulations on parallel computers with dynamic load balancing". Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269198.
Texto completoSaid, Mohd Farid bin Muhamad. "Development of particle sizing based on dynamic image analysis". Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/10246.
Texto completoBrackstone, Mark Andrew. "Dynamic properties of models of modulated systems in condensed matter". Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.255764.
Texto completoBotero, Cristina, Heiko Kremer, Andreas P. Fröba y Alfred Leipertz. "Particle diffusion coefficient and dynamic viscosity in non-ideal liquid mixtures by dynamic light scattering". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196233.
Texto completoBotero, Cristina, Heiko Kremer, Andreas P. Fröba y Alfred Leipertz. "Particle diffusion coefficient and dynamic viscosity in non-ideal liquid mixtures by dynamic light scattering". Diffusion fundamentals 2 (2005) 67, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14401.
Texto completoThornton, Stuart C. "Computational volume dynamic analysis of a particle beam cluster source". Thesis, University of Leicester, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.552750.
Texto completoAb, Wahab M. N. "Self-limitation, dynamic and flexible approaches for particle swarm optimisation". Thesis, University of Salford, 2017. http://usir.salford.ac.uk/42351/.
Texto completoSilwal, Shrawani. "A Dynamic Taxi Ride Sharing System Using Particle Swarm Optimization". Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1588198872893409.
Texto completoGoel, Ashish. "Dynamic loading of structures by high speed granular media". Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277444.
Texto completoAlshammery, Anas Obeed Adras. "Modelling sintering at particle scale using variational and molecular dynamic methods". Thesis, University of Leicester, 2018. http://hdl.handle.net/2381/42879.
Texto completoZhu, Ting. "Color-Based Fingertip Tracking Using Modified Dynamic Model Particle Filtering Method". The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306863054.
Texto completoSchön, Thomas B. "Estimation of Nonlinear Dynamic Systems : Theory and Applications". Doctoral thesis, Linköpings universitet, Reglerteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7124.
Texto completoJohansson, Henrik. "Road-constrained target tracking using particle filter". Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11562.
Texto completoIn this work a particle filter (PF) that uses a one-dimensional dynamic model to estimate the position of vehicles traveling on a road is derived. The dynamic model used in the PF is a second order linear-Gaussian model. To be able to track targets traveling both on and off road two different multiple model filters are proposed. One of the filters is a modified version of the Efficient Interacting Multiple Model (E-IMM) and the other is a version of the Multiple Likelihood Models (MLM). Both of the filters uses two modes, one for the on road motion and one for the off road motion. The E-IMM filter and the MLM filter are compared to the standard PF to be able to see the performance gain in using multiple models. This result indicates that the multiple model filters have better performance, at least when the true mode switching probabilities are used.
Den här arbetet presenterar ett partikelfilter som använder sig av en endimensionell dynamisk modell för att skatta positionen på fordon som befinner sig på någon väg. Den dynamiska modellen som används i partikelfiltret är en andra ordningens linjär-gaussisk modell. För att kunna spåra fordon som befinner sig både på och utanför vägen så föreslås två olika multipla filter. Ena filtret är en modifierad
variant av Efficient Interacting Multiple Model (E-IMM) och den andra är en version a Multiple Likelihood Models (MLM). Båda filtren använder sig av två moder, en för rörelse på vägen och en för rörelse utanför vägen. E-IMM filtret och MLM filtret jämförs med ett standard partikelfilter för att kunna se förbättringen vid använding av multipla modeller. Resultatet visar att båda multipla modell filtren ger bättre resultat, i varje fall då rätt sannolikheter för modbyte används.
Thompson, Ian. "Dynamic phase transitions in biased ensembles of particle systems with repulsive interactions". Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.665407.
Texto completoGaunt, Adam P. "Towards micro-imaging with dissolution dynamic nuclear polarisation". Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/51219/.
Texto completoMüller, Alexandra [Verfasser]. "Dynamic Refinement and Coarsening for the Smoothed Particle Hydrodynamics Method / Alexandra Müller". Aachen : Shaker, 2017. http://d-nb.info/1124366555/34.
Texto completoRakitianskaia, A. S. (Anastassia Sergeevna). "Using particle swarm optimisation to train feedforward neural networks in dynamic environments". Diss., University of Pretoria, 2011. http://hdl.handle.net/2263/28618.
Texto completoDissertation (MSc)--University of Pretoria, 2011.
Computer Science
Unrestricted
Bilgen, Suheyla. "Dynamic pressure in particle accelerators : experimental measurements and simulation for the LHC". Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP020.
Texto completoUltra-High Vacuum is an essential requirement to achieve design performances and high luminosities in high-energy particle colliders. Consequently, the understanding of the dynamic pressure evolution during accelerator operation is fundamental to provide solutions to mitigate pressure rises induced by multiple-effects occurring in the vacuum chambers and leading to beam instabilities. For the LHC, the appearance of instabilities may be due to the succession of several phenomena. First, the high intensity proton beams ionize the residual gas producing positive ions (mainly H₂⁺ or CO⁺) as well as accelerated electrons which impinge the copper wall of the beam pipe. Then, these interactions induce: (i) the desorption of gases adsorbed on the surfaces leading to pressure rises; (ii) the creation of secondary particles (ions, electrons). In this latter case, the production of secondary electrons leads to the so-called “Electron Cloud” build-up by multipacting effect, the mitigation of which being one of the major challenges of the LHC storage ring. Electron clouds generate beam instabilities, pressure rises and heat loads on the walls of beam pipe and can lead to “quench” of the superconducting magnets. All these phenomena limit the maximum intensity of the beams and thus the ultimate luminosity achievable in a proton accelerator. This work aims to investigate some fundamental phenomena which drive the dynamic pressure in the LHC, namely the effects induced by electrons and ions interacting with the copper surface of the beam screens on the one hand and the influence of the surface chemistry of copper on the other hand. First, in-situ measurements were performed. Electron and ion currents as well as pressure were recorded in situ in the Vacuum Pilot Sector (VPS) located on the LHC ring during the RUN II. By analyzing the results, more ions than expected were detected and the interplay between electrons, ions and pressure changes was investigated. Then, the ion-stimulated desorption was studied, using a devoted experimental set-up at the CERN vacuum Lab. The influence of the nature, mass, and energy of the incident ions interacting with the copper surface on the ion-desorption yields was discussed. In addition, extensive surface analyses were performed in the IJCLab laboratory to identify the role played by the surface chemistry on the electron emission yield, surface conditioning processes and the stimulated gas desorption. The fundamental role of the surface chemical components (contaminants, presence of carbon and native oxide layers) on the secondary electron yield was evidenced. Finally, we proposed a simulation code allowing to predict the pressure profiles in the vacuum chambers of particle accelerators as well as their evolution under dynamic conditions (i.e. as a function of time). This new simulation code called DYVACS (DYnamic VACuum Simulation) is an upgrade of the VASCO code developed at CERN. It was applied to simulate the dynamic pressure in the VPS when proton beams circulate into the ring. The electron cloud build-up was implemented in the code via electron cloud maps. The ionization of the residual gas by electrons was also considered. Results obtained with the DYVACS code are compared to pressure measurements recorded during typical fills for physics and a good agreement is obtained. This PhD study has provided interesting results and has allowed the development of new experimental and simulation tools that will be useful for further investigations on the vacuum stability of future particle accelerators such as HL-LHC or FCC (ee and hh)
Helbig, Marde. "Solving dynamic multi-objective optimisation problems using vector evaluated particle swarm optimisation". Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/28161.
Texto completoThesis (PhD)--University of Pretoria, 2012.
Computer Science
unrestricted
McGeorge-Henderson, Ben P. "Novel acquisition strategies for dissolution dynamic nuclear polarisation". Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/43266/.
Texto completoZhang, Fangli. "A particle-set distributed hydrological model for the dynamic simulation of surface runoff". HKBU Institutional Repository, 2017. https://repository.hkbu.edu.hk/etd_oa/472.
Texto completoAbbaspour-Fard, Mohammad Hossein. "Discrete element modelling of the dynamic behaviour of non-spherical particulate materials". Thesis, University of Newcastle Upon Tyne, 2000. http://hdl.handle.net/10443/970.
Texto completoBlom, Andrej. "Comparing FumeFx with Autodesk Maya Dynamic System". Thesis, University of Gävle, Department of Mathematics, Natural and Computer Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-610.
Texto completoOne of the main problem areas within computer graphics is simulating natural phenomena’s, working with fluid solvers, and particle systems. In the special effects industry, there is a demand for mimicking appearance of common special effect such as fire, smoke, and water. Autodesk Maya and FumeFx are used for exploring those methods in creating smoke and fire simulations and implementing those into a
large dynamic system, while researching the possibility to efficiently control and modify an entire dynamic system on a per object level. Final production renders results are from both Maya and FumeFx.
Lavis, Benjamin Mark Mechanical & Manufacturing Engineering Faculty of Engineering UNSW. "Spatially reconfigurable and non-parametric representation of dynamic bayesian beliefs". Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2008. http://handle.unsw.edu.au/1959.4/41468.
Texto completoWisniewski, Daniel. "Simulations of Dynamic Nuclear Polarization pathways in large spin ensembles". Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/39045/.
Texto completoCurrie, T. D. G. "Application of particle image velocimetry to the investigation of gas dynamic flow in pipes". Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411093.
Texto completoChao, Chien-Wei. "An Improved Dynamic Particle Packing Model for Prediction of the Microstructure in Porous Electrodes". BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5632.
Texto completoPérez, Linde Angel Joaquin. "Application of cross polarisation techniques to dynamic nuclear polarisation dissolution experiments". Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11417/.
Texto completoMiguel, López María del Carmen. "Dynamic Properties of Magnetic Colloidal Particles and Holes". Doctoral thesis, Universitat de Barcelona, 1985. http://hdl.handle.net/10803/667638.
Texto completoA lo largo de esta monografía nos hemos ocupado del estudio de sistemas fluidos, tanto con monodominios magnéticos como con dos tipos distintos de partículas, magnéticas y no magnéticas, en dispersión en un líquido newtoniano en situaciones fuera del equilibrio. El comportamiento de estos sistemas se ve influenciado en gran medida por la presencia de un campo magnético externo, lo que da lugar a nuevos fenómenos que han sido el fundamento de muchas aplicaciones prácticas. Sin embargo, esta influencia depende de los diferentes procesos de relajación que tienen lugar dentro las partículas, con respecto a sus ejes cristalinos, así como fuera de ellas, con respecto al fluido portador. Hemos descrito cuáles son estos procesos y obtenido la dependencia con respecto de los parámetros que describen las partículas y el fluido, de algunos coeficientes que caracterizan las propiedades reológicas, magnéticas y ópticas de la suspensión coloidal.
Hobbs, Andrew M. "Design and optimization of a vortex particle separator for a hot mix asphalt plant using computational fluid dynamics". Thesis, Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04192004-101304/unrestricted/hobbs%5Fandrew%5Fm%5F200312%5Fms.pdf.
Texto completoMANFREDOTTI, CRISTINA ELENA. "Modeling and inference with relational dynamic bayesian networks". Doctoral thesis, Università degli Studi di Milano-Bicocca, 2010. http://hdl.handle.net/10281/7829.
Texto completoKim, Yeonsu. "Probabilistic Estimation of River Discharge Considering Channel Characteristics Uncertainty with Particle Filters". 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/180482.
Texto completoPANTALEI, CLAUDIA. "Single-particle dynamics of helium mixtures and 4He in nanometric confinement". Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/473.
Texto completoThe aim of this thesis work is the study, by means of Deep Inelastic Neutron Scatter- ing, of the microscopic dynamics of two different helium systems at low temperature (T=2K): an isotopic helium mixture (in the fluid phase and near the melting point) and a system of 4He in nanometric confinement. The interest in the helium, from the first decades of 1900, is due to its unique features: it is the only element in nature that doesn't have a solid phase at absolute zero. Thus, at low temperatures it presents quantum effects, usually negligible in other physical systems that in this condition crystallise. The helium is thus the unique test-bed for theoretical quantum models, in particular for studying the interacting boson (4He) and fermion (3He) systems. Moreover, if in 4He are added some atoms of 3He it is possible to derive important information about the interplay of these two statistics. In this context, several experiments on liquid and solid helium have been performed. Measurements on pure 3He and 4He have shown that the mean kinetic energy of pure liquids depends on the density of the system and increases decreasing the molar volume. On the other hand, the microscopic dynamics of helium mixtures reveals quite a different picture with respect to pure 3He and 4He: the mean kinetic energy of the light isotope, above a molar volume of 25cm3/mole, shows a remarkable independence from molar volume and concentration. This behaviour could be explained by quantum effects, such as exchange effects. The first part of the present work deals with the experiments performed to investigate the dynamics of the mixtures from 22cm3/mole to 25cm3/mole and shows how, at these low molar volumes, the mean kinetic energy of 3He starts again to be strongly dependent on the molar volume, increasing until reaching, at 22.7cm3/mole, the corresponding value of pure helium. Recent measurements have been also performed to investigate the influence of confinement on helium. Experiments on 4He, adsorbed in flat surface or slit geometry porous substrates, have shown a large increase in helium mean kinetic energy. This has been attributed to the strong localisation effects induced by the helium-substrate interaction potential, which mainly influence the firsts two or three adsorbed layers. Such effects can be also investigated by confining 4He atoms in cylindrical pore geometries and by studying their dynamics as function of pore size. Aim of the second part of the thesis has been the determination of the single particle mean kinetic energy of 4He adsorbed in cylindrical silica nanopores (Xerogel) having two different pore diameters, namely, 24 ºAand 160 ºA, and to evaluate the dependence of single- particle dynamics on pore sizes, layer coverage, and confining system geometry. The measurements have been performed at a temperature of T=2.5K, saturated vapour pressure, and 95% volume filling. Significant changes in the values of the single particle mean kinetic energy are found: they are remarkably higher than the value of normal liquid 4He at the same conditions. The results are interpreted in terms of a model in which 4He atoms are arranged in concentric annuli along the cylindrical pore axis, growing layer-by-layer and with the mean kinetic energy mainly dependent on the ratio between the atomic diameter and the pore diameter.
Stanhope, Austin. "A control architecture for dynamic execution of robot tasks trained in real-time using particle filters". abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1472980.
Texto completoBohne, W., D. Polster, H. G. Ortlepp, D. Hilscher y Guntram Pausch. "Particle identification in a wide dynamic range based on pulse-shape analysis with solid-state detectors". Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-32464.
Texto completoYin, Shu-Chen y 殷淑貞. "Particle Swarm Optimization for Dynamic Clustering". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/34944364571653171729.
Texto completo大同大學
資訊經營學系(所)
96
Data clustering, one of the major research technologies of data mining, is the process of grouping together similar multi-dimensional data vectors into a number of clusters. The process of data clustering needs to consider the number of clusters and the result of clusters. The natural number of clusters will influence the final clustering result. How to find the optimal number of clusters becomes an important issue. In this research, the author develops a novel dynamic clustering method, called Particle Swarm Optimization for Dynamic Clustering (PSODC), to cluster a dataset without setting the cluster number in advance. PSODC consists of two stages: evolution of optimal cluster numbers and data clustering in each sub-swarm representing a specified cluster number. In the first stage, the particles in a sub-swarm randomly move toward one of other sub-swarms based on the so-far-best cluster number. In the second stage, the particle swarm algorithm is used to cluster the data items. After that, a clustering validity index is applied to evaluate the clustering result of each sub-swarm. The above procedure is repeated until the clustering computation converges. To test the proposed algorithm and compare it with other dynamic clustering algorithms, thirteen test problems, including artificial data sets and UCI data sets, are used. The experimental results show that PSODC has outstanding performance in dynamic data clustering.
Lin, Wei-Hsun. "Dynamic Characterization of Micro-Particle Systems". Thesis, 2016. https://thesis.library.caltech.edu/9054/55/lin_wei-hsun_2015_thesis.pdf.
Texto completoOrdered granular systems have been a subject of active research for decades. Due to their rich dynamic response and nonlinearity, ordered granular systems have been suggested for several applications, such as solitary wave focusing, acoustic signals manipulation, and vibration absorption. Most of the fundamental research performed on ordered granular systems has focused on macro-scale examples. However, most engineering applications require these systems to operate at much smaller scales. Very little is known about the response of micro-scale granular systems, primarily because of the difficulties in realizing reliable and quantitative experiments, which originate from the discrete nature of granular materials and their highly nonlinear inter-particle contact forces.
In this work, we investigate the physics of ordered micro-granular systems by designing an innovative experimental platform that allows us to assemble, excite, and characterize ordered micro-granular systems. This new experimental platform employs a laser system to deliver impulses with controlled momentum and incorporates non-contact measurement apparatuses to detect the particles’ displacement and velocity. We demonstrated the capability of the laser system to excite systems of dry (stainless steel particles of radius 150 micrometers) and wet (silica particles of radius 3.69 micrometers, immersed in fluid) micro-particles, after which we analyzed the stress propagation through these systems.
We derived the equations of motion governing the dynamic response of dry and wet particles on a substrate, which we then validated in experiments. We then measured the losses in these systems and characterized the collision and friction between two micro-particles. We studied wave propagation in one-dimensional dry chains of micro-particles as well as in two-dimensional colloidal systems immersed in fluid. We investigated the influence of defects to wave propagation in the one-dimensional systems. Finally, we characterized the wave-attenuation and its relation to the viscosity of the surrounding fluid and performed computer simulations to establish a model that captures the observed response.
The findings of the study offer the first systematic experimental and numerical analysis of wave propagation through ordered systems of micro-particles. The experimental system designed in this work provides the necessary tools for further fundamental studies of wave propagation in both granular and colloidal systems.
李金紋. "A particle-based cloth dynamic behavior simulation". Thesis, 2001. http://ndltd.ncl.edu.tw/handle/85022844194024505693.
Texto completo國立成功大學
工程科學系
89
A mass-spring system was employed to model cloth. The mass particles, arranged in a rectilinear grid, are connected with three types of springs. These are 1)structural springs that connect nearest-neighbor particles along thread lines, 2)shear springs that connect nearest-neighbor particles along diagonals, and 3)bending springs that connect a particle with its second neighbor along thread lines. The dynamic behaviors of the springs are considered in order to simulate a cloth hanging from to points and a tablecloth draping over a table. Two-step method was used to handle collision detection and response problems. Several examples were given to show the results. It is shown that the proposed cloth simulation system is useful for simulating the dynamic behavior of cloth.
Bellissima, Stefano. "Single particle dynamics in liquid systems". Doctoral thesis, 2017. http://hdl.handle.net/2158/1088719.
Texto completo