Дисертації з теми "Dispersion parameters"
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Wang, Bo Sen. "Statistical process control of process dispersion when parameters are unknown." Thesis, University of Macau, 2007. http://umaclib3.umac.mo/record=b1872930.
Повний текст джерелаDe, Samrat. "Effect of Variation of the Systemic Parameters on the Structural Response of Single Degree of Freedom Systems Subjected to Incremental Dynamic Analysis." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9730.
Повний текст джерелаMaster of Science
Nowak, Wolfgang. "Geostatistical methods for the identification of flow and transport parameters in the subsurface." [S.l. : s.n.], 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11759377.
Повний текст джерелаSashkova, Y. V., and E. N. Odarenko. "The Effect of Additional Layers Parameters on the Modifided Bragg Waveguide Characteristics." Thesis, IEEE, 2017. https://openarchive.nure.ua/handle/document/18112.
Повний текст джерелаRuddy, Sean Matthew. "Shrinkage of dispersion parameters in the double exponential family of distributions, with applications to genomic sequencing." Thesis, University of California, Berkeley, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3686002.
Повний текст джерелаThe prevalence of sequencing experiments in genomics has led to an increased use of methods for count data in analyzing high-throughput genomic data to perform analyses. The importance of shrinkage methods in improving the performance of statistical methods remains. A common example is that of gene expression data, where the counts per gene are often modeled as some form of an overdispersed Poisson. In this case, shrinkage estimates of the per-gene dispersion parameter have lead to improved estimation of dispersion in the case of a small number of samples. We address a different count setting introduced by the use of sequencing data: comparing differential proportional usage via an overdispersed binomial model. Such a model can be useful for testing differential exon inclusion in mRNA-Seq experiments in addition to the typical differential gene expression analysis. In this setting, there are fewer such shrinkage methods for the dispersion parameter. We introduce a novel method that is developed by modeling the dispersion based on the double exponential family of distributions proposed by Efron (1986), also known as the exponential dispersion model (Jorgensen, 1987). Our methods (WEB-Seq and DEB-Seq) are empirical bayes strategies for producing a shrunken estimate of dispersion that can be applied to any double exponential dispersion family, though we focus on the binomial and poisson. These methods effectively detect differential proportional usage, and have close ties to the weighted likelihood strategy of edgeR developed for gene expression data (Robinson and Smyth, 2007; Robinson et al., 2010). We analyze their behavior on simulated data sets as well as real data for both differential exon usage and differential gene expression. In the exon usage case, we will demonstrate our methods' superior ability to control the FDR and detect truly different features compared to existing methods. In the gene expression setting, our methods fail to control the FDR; however, the rankings of the genes by p-value is among the top performers and proves to be robust to both changes in the probability distribution used to generate the counts and in low sample size situations. We provide implementation of our methods in the R package DoubleExpSeq available from the Comprehensive R Archive Network (CRAN).
Gislason, Gardar. "Effect of Petrophysical Parameters on Seismic Waveform Signatures : Review of Theory with Case Study from Frigg Delta Oil Field, Norway." Thesis, Uppsala universitet, Geofysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303793.
Повний текст джерелаKonventionell AVO-analys har använts under fyra deceniär som ett hjälpmedel för att finna olje- och gasreserver, men tekniken kan även användas för att erhålla information om bergets porositet, vätskemättnaden och andra viktiga petrofysiska parametrar. I denna avhandlingen har jag studerat hur våginducerat vätskeflöde påverkar dämpningen av den seismiska vågformssignaturen. I den första delen av avhandlingen användes två metoder för att syntetisk modellera dämpning orsakad av våginducerat vätskeflöde: "White's modell" och "double-porosity dual-permeability (DPDP) modellen". Både syntetiska parametrar och verkliga parametrar från borrhålsdata från ett känt norskt oljefält användes vid modelleringen. White's modell visade sig modellera relativt kraftig dämpning (5%) för medelstarkt konsoliderade gasreservoarer medan för oljereservoarer med motsvaranda konsolidering dämpningen var så låg (0.3%) att det är uppenbart att i en verklig situation skulle dämpningen inte vara mätbar. DPDP modelleringen verkar vara bättre på att beskriva dämpningen och gav dämpningar upp till 10% för en medelstarkt konsoliderad oljereservoar. Brist på parametrar från borrhålsdata gjorde att det inte var möjligt att på ett tillfredställande sätt modellera en verklig situation.Dock visade syntetisk data intressant karaktäristik och det rekommenderas därför att mer och detaljerade borrhålsparametrar mäts om ytterligare forskning om detta ska genomföras. För den andra delen av avhandlingen har Svenska Petroleum Exploration AB och Det Norske Oljeselskap ASA bidragit med stackad seismisk data som även var spectralanalyserad för indikationer på frekvensberoende dämpningsvariationer (utfört med fouriertransform och komplex spectraldekomposition). Tolv områden på den stackade kuben analyserades; sex oljemättade och sex som antogs vara vattenmättade. I varje område valdes en huvudtracé och de två närmaste tracéerna på vardera sida (totalt fem tracéer). Metoden med komplex spectraldekomposition klarade inte att analysera signalen från den stackade sektionen, varför fouriertransform användes för vidare analys. Frekvensanalysen gav en topp vid ~30 Hz för både olje- och vattenmättade reservoarer vilket tycks vara en karaktäristisk frekvens för källan. Detta kunde tyvärr inte bekräftas och tiden räckte inte till för att testa antagandet. Fouriertransformen tycks visa en viss skillnad mellan olje- och vattenmättade tracéer, men det kan också bero på skillnad i litologin snarare än porvätskan. Där för rekommenderas vid fortsättning på denna forskning att 4D seismisk data används för att analysera samma område men med data från olika tidpunkter. Det rekommenderas även att ostackad eller råa skott-data används eftersom väsentlig information kan försvinna när data stackas.
Advisor present: Dr. Chris Juhlin
Examiner: Dr. Milovan Urosevic
Opponent: Álvaro Polín Tornero
RITA, ISAAC NEWTON FERREIRA SANTA. "COMPARISON OF TECHNIQUES FOR CFAR CLEAN AND ANALYSIS OF DISPERSION PARAMETERS OF MOBILE RADIO CHANNEL IN THE 2.5 GHZ." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35416@1.
Повний текст джерелаINSTITUTO MILITAR DE ENGENHARIA
CENTRO TECNOLÓGICO DO EXÉRCITO
Este trabalho objetiva apresentar os resultados das medições e a análise da resposta do canal banda larga na faixa de frequências de 2.5 GHz em um ambiente urbano, através da técnica de sondagem de multiportadoras. Para isso, os perfis de retardo de potência desse canal foram obtidos com base nos dados medidos na região da Gávea na cidade do Rio de Janeiro, utilizando duas técnicas de limpeza de perfis de retardo. As técnicas de limpeza são apresentadas e seus resultados são comparados para a transmissão de um sinal de 20MHz de largura de banda. Os Retardos RMS (Root Mean Square) são calculados a partir desses Perfis de Retardo de Potências filtrados e o erro médio quadrático para cada técnica de limpeza é avaliado e comparado para algumas posições do receptor.
This work presents the results of measurements and the analysis of the response of a wide band channel in the 2.5 GHz band for an urban environment, using the multicarrier sounding technique. To do this, the power delay profile (PDP) of the channel was obtained based on data measured at the neighborhood of Gávea, in the Rio de Janeiro, using two power delay profile filtering techniques. The power delay profile filtering techniques are presented and the results are compared for a transmitted signal of 20MHz bandwidth. The RMS (root mean square) delay spreads are determined from the filtered PDPs and from the original ones. The results are compared for some positions of the receiver and the quadratic mean error is evaluated.
Khodami, Maryam. "Dispersion Characteristics of One-dimensional Photonic Band Gap Structures Composed of Metallic Inclusions." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23179.
Повний текст джерелаSabnis, Aniket D. "Impact of material attributes & process parameters on critical quality attributes of the amorphous solid dispersion products obtained using hot melt extrusion." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/17458.
Повний текст джерелаDooher, Thomas. "Multi-walled carbon nanotube/high temperature polymer composites an investigation into the role of the solubility parameters in predicting dispersion and interfacial bonding." Thesis, University of Ulster, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536463.
Повний текст джерелаDedewanou, Myriam. "Vulnérabilité spécifique des forages vis-à-vis des phytosanitaires : moélisation et application au Val d'Orléans." Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2020/document.
Повний текст джерелаThe specific vulnerability estimations for the groundwater resources are GIS methods that establish spatial qualitative indices which determine the sensitivity of infiltration from surface contaminants. On the other hand, the transfer functions, using the Residence Time Distribution (RTD), are used to predict temporal water quality change in a borehole, but they do not integrate the spatial variability of the land use. Based on an analytic (advection / dispersion equation) approach, a simple GIS-linked RTD model for groundwater transport has been developed. The tool estimates the water quality from the vulnerability map dataset. This method enables to validate the specific vulnerability maps with the water quality monitoring at the borehole. It links the impacts of land use with the temporal evolution of the water quality. A equivalent formulation parameters is proposed to take into account the hydrodynamic characteristics of the soil compartments (unsaturated zone and Saturated Zone). A theoretical validation of the approach is made from finite-difference groundwater models: HYDRUS and MODFLOW. Also, an application of the RTD compilation was realized on the Val d’Orléans karstic aquifer. This last methodology allowed to determine the RTD of pesticides into the groundwater and highlighted the not insignificant presence of the metabolite of the metazachlor in the groundwater drilling. At the same time, the GIS-linked RTD model makes possible the localization of the contributing zones in the watershed
Toquet, Fabien. "Study of the combined roles of the Silica/Oil/UHMWPE formulation and process parameters on morphological and electrical properties of battery Separators." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1014/document.
Повний текст джерелаThis work is devoted to understand the effect of the formulation and more specifically of the precipitated silica on the resistivity of the PE-separators. The PE-separators are designed for the lead-acid batteries. PE-separators are composed of precipitated silica, ultrahigh molecular weight polyethylene (UHMW-PE) and organic oil. The first part of this work was to elaborate PE-separator models at a laboratory scale. Then, the factors impacting the structural and physico-chemicals properties of PE-separators were investigated. These factors are mainly the amounts of oil, precipitated silica, the grade of the precipitated silica, the temperature conditions of crystallization and the device used to elaborate the membrane. The influence of the amounts of oil and precipitated silica on the crystallization of the polyethylene wasthoroughly described showing that the oil helps to increase the final crystallinity of UHMWPE and that the silica plays a role of oil reservoir. Moreover, it was shown that the amount and the grade of precipitated silica have an influence on the wettable part of the porosity of the PE-separators. The coating of the pores by the precipitated silica is responsible of the wettability of the membranes by the electrolyte. Thus, an empirical parameter has been proposed in order to quantify the efficiency of the dispersion and distribution of the precipitated silica in the membrane. The more the membranes are wettable by the electrolyte the more the resistivity of the membranes is decreased. To finish, for a same amount of components and a same method of processing, it is possible to discriminate the efficiency of each grade of precipitated silica for the battery separator application
Bohli, Nadra. "Etude physique de la formation de films à base de polymères conducteurs et applications en micro-éléctronique." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13961/document.
Повний текст джерелаThe purpose of this study is to perform polyaniline films with the highest conductivity. The effect of the solvent type and the casting temperature on the electrical properties of plastdoped polyaniline dispersions and films were investigated. For this purpose, rheological and dielectric investigations have been undertaken for dispersions of plast-doped polyaniline in two different solvents (dichloroacetic acid and formic acid / dichloroacetic acid mixture). Changes appearing above a certain temperature, 318K for PANI/DCAA and 313K for PANI/DCAA-FA, for both rheological dielectric and rheological parameters revealed the existence of a second order liquid-liquid structural transition occurring in the polyaniline organic dispersions. We also investigated the effect of the selected processing parameters on the film properties. We found that the DC conductivity mechanism is governed by Mott’s three-dimensional variable range hopping (3D VRH) model for PANI/DCAA films and by a fluctuation induced tunnelling model (FIT) for PANI/DCAA-FA films. Besides, the films cast at temperatures around the second order liquid-liquid structural transition temperature of polyaniline dispersions lead to the lowest conductivity and crystallinity, regardless of the solvent type used. A qualitative correlation was also found between the conductivity and the crystallinity of the polyaniline films. So, in order to obtain films with the highest electric conductivities, we have to apply experimental conditions leading to the highest crystallinity (298 K for PANI/DCAA)
Wang, Junyang. "Dicke narrowing and speed-dependent effects in dispersion signals : Influence on assessment of concentration and spectral parameters by noise-immune cavity-enhanced optical heterodyne molecular spectrometry." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-70235.
Повний текст джерелаCorpace, Fabien. "Soudage par résistance du gainage combustible ODS d'un réacteur nucléaire de 4ème génération." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00786263.
Повний текст джерелаBeran, Jaroslav. "Počítačové modelování metamateriálů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217540.
Повний текст джерелаPalmberger, Anna. "Regularization parameter selection methods for an inverse dispersion problem." Thesis, Umeå universitet, Institutionen för fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-184296.
Повний текст джерелаMedianu, Silviu. "Identification des systèmes hamiltoniens à ports." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT116/document.
Повний текст джерелаThe objective of this thesis is to develop a specific identification theory for Port Controlled Hamiltonian (PCH) systems. The main reasons to develop this theory comes from their remarkable properties like power conservation and stability under power preserving interconnection (e.g. parallel, series or feedback interconnections). In a first part PCH systems are analysed for structural identifiability using some classical or new techniques: observability/controllability identifiability, direct test, power series expansion or a new power energy approach, defining also a new concept of port identifiability. Further it is proposed a perturbation model by means of the interaction port together with a practical identifiability analysis realized using the controllability and observability concepts. The fourth part presents a new framework for time-discretization of PCH systems in the nonlinear or linear case, by combined discretization of the flows and efforts preserving in the same time their characteristic properties. Also in this part it is proposed a discretization error Hamiltonian to distinguish the continuous-time PCH system from the discrete-time one. The fifth part of the thesis makes an analysis of PCH systems identifiability using the subspace identification approach in the deterministic case, proposing also a new power energy approach in direct connection with the structural identifiability results. In the end are presented the main conclusions, personal contributions and perspectives for future work
Zaritsky, Dennis. "Clues to the nature of ultradiffuse galaxies from estimated galaxy velocity dispersions." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/624738.
Повний текст джерелаZhang, Zhaopeng. "Research into order parameters and graphene dispersions in liquid crystal systems using Raman spectroscopy." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/research-into-order-parameters-and-graphene-dispersions-in-liquid-crystal-systems-using-raman-spectroscopy(c7ccd62e-817b-4d82-b9e1-68be43f28ff5).html.
Повний текст джерелаWang, Ran. "Market power, cost efficiency and pricing strategies of domestic airline industry." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53930.
Повний текст джерелаPierangeli, Marco. "Il problema della misura delle correnti di dispersione negli impianti elettrici." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаAlsabbagh, Mohamad. "Parasitics and Current-Dispersion Modeling of AlGaN/GaN HEMTs Fabricated on Different Substrates Using the Equivalent-Circuit Modeling Technique." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40706.
Повний текст джерелаBalon, Jiří. "Měřící metody klíčových parametrů v optických sítích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218247.
Повний текст джерелаBaccouche, Yousra. "Caractérisation non linéaire de l'endommagement des matériaux composites par ondes guidées." Phd thesis, Université du Maine, 2013. http://tel.archives-ouvertes.fr/tel-00840424.
Повний текст джерелаHall, James Stroman. "Adaptive dispersion compensation and ultrasonic imaging for structural health monitoring." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41159.
Повний текст джерелаMcLaughlin, Eric M. "Analysis of the Impact of Over or Underestimating the Dispersion Parameter on the Results of Tests for Differential Gene Expression." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492731115824706.
Повний текст джерелаSenet, Christian M. "Dynamics of dispersive boundaries the determination of spatial hydrographic parameter maps from optical sea surface image sequences /." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972400729.
Повний текст джерелаCAMBIER, SIMON. "Approche probabiliste pour la prise en compte de la dispersion de parametres mecaniques application a la fatigue vibratoire de reseaux de tuyauteries." Paris, ENSAM, 2000. http://www.theses.fr/2000ENAM0024.
Повний текст джерелаAyad, Mohammad. "Homogenization-based, higher-gradient dynamical response of micro-structured media." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0062.
Повний текст джерелаA discrete dynamic approach (DDM) is developed in the context of beam mechanics to calculate the dispersion characteristics of periodic structures. Subsequently, based on this dynamical beam formulation, we calculate the dispersion characteristics of one-dimensional and two-dimensional periodic media. A sufficiently high order development of the forces and moments of the structural elements is necessary to accurately describe the propagation modes of higher order. These results show that the calculations of the dispersion characteristics of structural systems can be approached with good accuracy by the dynamics of the discrete elements. Besides, non-classical behaviors can be captured not only by higher order expansion but also by higher gradient formulations. To that scope, we develop a higher gradient dynamic homogenization method with micro-inertia effects. Using this formulation, we compute the macroscopic constitutive parameters up to the second gradient, using two distinct approaches, namely Hamilton’s principle and a total internal energy formulation. We analyze the sensitivity of the second gradient constitutive terms on the inner material and geometric parameters for the case of composite materials made of a periodic, layered microstructure. Moreover, we show that the formulations based on the total internal energy taking into account higher order gradient terms give the best description of wave propagation through the composite. We analyze the higher order and micro-inertia contributions on the mechanical behavior of composite structures by calculating the effective static and dynamic properties of composite beams using a higher order dynamic homogenization method. We compute the effective longitudinal static response with higher order gradient, by quantifying the relative difference compared to the classical formulation of Cauchy type, which is based on the first gradient of displacement. We then analyze the propagation properties of longitudinal waves in terms of the natural frequency of composite structural elements, taking into account the contribution of micro-inertia. The internal length plays a crucial role in the contributions of micro-inertia, which is particularly significant for low internal length values, therefore for a wide range of materials used in structural engineering. The developed method shows an important size effect for the higher gradients, and to remove these effects correction terms have been incorporated which are related to the quadratic moment of inertia. We analyze in this context the influence of the correction terms on the static and dynamic behavior of composites with a central inclusion
Zhang, Wei. "LONGITUDINAL SOLUTE TRANSPORT IN OPEN-CHANNEL FLOW - A Numerical Simulation Study on Longitudinal Dispersion, Surface Storage Effects, Transverse Mixing, Uncertainties and Parameter-Transferring Problems." Diss., Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/139476.
Повний текст джерелаPh.D.
The longitudinal solute transport modeling is critical in river and stream water quality management, control, and the mitigation of hazardous riverine spills. One of the widely used "deadzone" model is the transient storage model (TSM). TSM is a significant improvement over the advection-dispersion model (ADM), but it cannot simulate the breakthrough curve (BTC) immediately after a large pool. Additionally, the calibration (parameterization) method is challenged by the non-identifiability which is common to all inverse modeling, and it seems TSM cannot be easily used as a predictive tool, more of an interpretive tool of solute transport, i.e., is the parameter set calibrated via inverse modeling transferable? Pools are fundamental stream morphology unit in streams with mixed bed materials in pool-riffle or pool-step sequences. Understanding of how a pool impacts the longitudinal solute transport is the first step towards improving current model such as TSM or developing new models. By introducing a dimensionless group, e= Q/(Dt W) (where, Q is the average volumetric flow rate; Dt is an average transverse dispersion coefficient; W is the channel flow width), derived from non-dimensionalization of the governing equations of one of the most rigorous 2-dimansional (2D) (depth-averaged) model, Mike21, this work presents an alternative way of longitudinal solute transport investigation. Using the 2D fully hydrodynamic Mike21, numerical experiments were conducted on hypothetical streams in this dissertation. Simulation study on hypothetical stream with pool reveals that a pool's effects on longitudinal solute transport are manifested by three aspects: boosting longitudinal spreading (concentration peak attenuation), causing a solute plume delay and increasing solute residence time. These effects fade like a "wake" as the solute plume moves downstream. e provides an insight into the physics of longitudinal transport; it outlines a relative transverse mixing intensity of a stream. The internal transport and mixing condition (including the secondary circulations) in a pool together with the pool's dimensions determine the pool's storage effects especially when e >>1. The BTCs downstream from a pool may be "heavy tailed" (i.e., have enormously slow decaying rate) which cannot be modeled by the TSM. Results also suggest that the falling limb of a BTC more accurately characterizes the pool's storage effects because the corresponding solute has more chance to sample the entire storage area. n a more fundamental perspective, the predictive ability of inverse modeling parameterized model is discussed and conclusion is made about the role of a stream/river system's nonlinearity in determining the predictability; a misleading mis-nomenclature in TSM application is also demonstrated with a numerical experiment.
Temple University--Theses
Költzsch, Konrad. "Parameter des turbulenten Strömungsfeldes und der Stoffausbreitung in rauhen turbulenten Plattengrenzschichten mit Bezug auf die atmosphärische Grenzschicht." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2001. http://nbn-resolving.de/urn:nbn:de:swb:14-994441263625-94079.
Повний текст джерелаBARROS, Fabiana Uchôa. "Matriz de covariâncias do estimador de máxima verossimilhança corrigido pelo viés em modelos lineares generalizados com parâmetro de dispersão desconhecido." Universidade Federal de Campina Grande, 2011. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1278.
Повний текст джерелаMade available in DSpace on 2018-07-27T16:10:22Z (GMT). No. of bitstreams: 1 FABIANA UCHÔA BARROS - DISSERTAÇÃO PPGMAT 2011..pdf: 444205 bytes, checksum: dd1ada684703bcb400e631c5f044668b (MD5) Previous issue date: 2011-12
Capes
Com base na expressão de Pace e Salvan (1997 pág. 30), obtivemos a matriz de covariâncias de segunda ordem dos estimadores de máxima verossimilhança corrigidos pelo viés de ordem n−1 em modelos lineares generalizados, considerando o parâmetro de dispersão desconhecido, porém o mesmo para todas as observações. A partir dessa matriz, realizamos modi cações no teste de Wald. Os resultados obtidos foram avaliados através de estudos de simulação de Monte Carlo.
Based on the expression of Pace and Salvan (1997 pág. 30), we obtained the second order covariance matrix of the of the maximum likelihood estimators corrected for bias of order n−1in generalized linear models, considering that the dispersion parameter is the same although unknown for all observations. From this matrix, we made modi cations to the Wald test. The results were evaluated through simulation studies of Monte Carlo.
Aslam, Shagufta. "Robust testing procedures based on S-estimate for the dispersion parameter of univariate and multivariate normal distribution and for the two-way mixed effect models /." Connect to Digital dissertations. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.
Повний текст джерелаKöltzsch, Konrad. "Parameter des turbulenten Strömungsfeldes und der Stoffausbreitung in rauhen turbulenten Plattengrenzschichten mit Bezug auf die atmosphärische Grenzschicht." Doctoral thesis, Technische Universität Dresden, 1999. https://tud.qucosa.de/id/qucosa%3A24749.
Повний текст джерелаFagerland, Steffen Knut. "Investigation of Focused Ion Beam/Scanning Electron Microscope parameters for Slice and View and Energy Dispersive X-ray Spectroscopy of Embedded Brain Tissue." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25765.
Повний текст джерелаDas, Suma Rani. "Investigation of Design and Operating Parameters in Partially-Filled Rubber Mixing Simulations." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1479151141596147.
Повний текст джерелаMarte, Judson Sloan. "High temperature flow behavior of titanium aluminide intermetallic matrix composites." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/45422.
Повний текст джерелаMaster of Science
Vijay, Dig. "Forced convective heat transfer through open cell foams." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2017. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-226330.
Повний текст джерелаBack, Markus. "Out-of-plane Ferromagnetic Resonance (FMR) measurements on magnetic nanoparticle dispersions for biomedical sensor applications." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-410179.
Повний текст джерелаJuutilainen, I. (Ilmari). "Modelling of conditional variance and uncertainty using industrial process data." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514282620.
Повний текст джерелаLekmine, Grégory. "QUANTIFICATION DES PARAMETRES DE TRANSPORT DES SOLUTES EN MILIEUX POREUX PAR TOMOGRAPHIE DE RESISTIVITE ELECTRIQUE : DEVELOPPEMENTS METHODOLOGIQUES ET EXPERIMENTAUX." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00682952.
Повний текст джерелаCarrasco, Carrillo Tomás. "Methods and tools for the design of RFICs." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/131009.
Повний текст джерелаL'enginyeria de radiofreqüència i la tecnologia de microones han assolit un desenvolupament inimaginable i avui en dia formen part de la majoria de les nostres activitats diàries. Probablement, la tecnologia mòbil ha tingut un desenvolupament més ràpid que qualsevol altre avenç tecnològic de l'era digital. Avui en dia, podem dir que el paradigma de la mobilitat s'ha assolit i tenim accés ràpid a internet des de qualsevol lloc on podem estar amb un dispositiu de butxaca. No obstant això, encara hi ha fites per endavant. Es més que probable que el paradigma de l’ "ambient intelligence” sigui el centre dels pròxims avenços en les tecnologies sense fils. A diferencia del paradigma de l"ambient intelligence', l'evolució de la tecnologia de la informació mai ha tingut l'objectiu explícit de canviar la societat, sinó que ho van fer com un efecte secundari, en canvi, les visions d' “ambient intelligence” proposen expressament el transformar la societat mitjançant la connexió completa i la seva informatització. Per tant, l'augment de la demanda de dispositius de ràdio freqüència (RF) i de les seves possibles aplicacions representa, no només un repte per a les indústries tecnològiques per millorar els seus plans de treball, sinó també per als enginyers de RF que hauran de dissenyar dispositius de baixa potència, més robusts, de mida petita i de baix cost. Quant a la robustesa dels dispositius, en els últims anys, les topologies de tipus diferencial han adquirit una important rellevància per la seva immunitat natural al soroll i resistència a les interferències. Dins d'aquest marc, un dispositiu de nports diferencial, encara pot ser tractat com un dispositiu 2nx2n i la teoria clàssica d'anàlisi de circuits (és a dir, la temia de quadripols) es pot aplicar a través de paràmetres Z, Y, h o els paràmetres S, més adequats en el camp de freqüència de ràdio. Tot i això, Bockelman i Eisenstadt introdueixen els paràmetres S mixtos, que expressen més adequadament el comportament diferencial i en mode comú de dispositius simètrics o asimètrics. Des de llavors, aquests paràmetres s'han utilitzat amb un grau variable d'èxit, com es mostrarà, principalment a causa d'una mala interpretació. D'aquesta manera, la primera part d'aquesta tesi està dedicada a estendre la teoria dels paràmetres S de mode mixt i proposa la metodologia d'anàlisi d'aquest tipus de dispositius i circuits. D'aquesta forma, en el Capítol 2, es desenvolupa el cas més simple d'un dispositiu de dos ports. En resoldre aquest cas simple, la major part de les mancances de la teoria actual es posen de relleu. Com a exemple, pennet la caracterització i la comparació de bobines simètriques i espiral no simètriques, que han estat un punt de controvèrsia fins ara. Després de resoldre aquest cas, al Capítol 3 s'estén la teOIia a un dispositiu de n-ports dels quals un nombre pot ser single-ended i la resta diferencials. És en aquest moment quan la dualitat existent entre els paràmetres S estàndard i de mode mixt es pot veure clarament i es destaca en el seu conjunt. Aquesta teoria permet, tanmateix, estendre la teoria clàssica d'amplificadors quan s'analitzen per mitjà de paràmetres S. Un altre punt clau en el desenvolupament ràpid i de baix cost dels dispositius de radiofreqüència és l'avenç en les eines CAD ràpides per a l'anàlisi i síntesi dels dispositius passius, en especial dels inductors. Aquests dispositius apareixen tot sovint en el disseny de radio freqüència degut a la seva gran versatilitat. Tot i que hi ha hagut múltiples intents de reemplaçar amb components externs o circuits, fins i tot actius, en el cas de les tecnologies de silici, els inductors planars s'han convertit en les formes més populars per la seva integrabilitat. No obstant això, el disseny d'inductors implica conèixer i posseir una experiència profunda no només en el comportament d'aquests dispositius, però també en l'ús de simuladors electromagnètics (EM). Desafortunadament, l'ús dels simuladors EM consumeix una quantitat important de temps i recursos. Per tant, la síntesi dels inductors representa un important inconvenient actualment. D'aquesta manera, la segona part d'aquesta tesi està dedicada a millorar alguns dels aspectes que frenen el procés de síntesi dels inductors. Per tant, en el Capítol 4, es descriu una tècnica 'ab initio' de generació de la malla per bobines planars en ràdio freqüència i microones. La tècnica es basa en l'estudi analític dels fenòmens d'aglomeració de corrent que tenen lloc a l'interior del component. En aquesta avaluació, no es requereix una solució explícita dels corrents i de les càrregues arreu del circuit. Llavors, el nombre de cel•les de la malla assignades a una tira de metall donada, depèn del valor inicialment obtingut a partir de l'estudi analític. La tècnica presentada pot avaluar les pèrdues en el component amb una gran precisió només en uns pocs segons, quan comparat amb un simulador electromagnètic normalment es necessitaria hores. De la mateixa manera, en el Capítol 5 es presenta un senzill algoritme de bisecció per a la síntesi d'inductors planars compactes. Es basa en un conjunt de regles heurístiques obtingut a partir de l'estudi del comportament electromagnètic d'aquests dispositius planars. D'aquesta manera, el nombre d'iteracions es manté moderadament baix.D'altra banda, per tal d'accelerar l'anàlisi en cada pas, s'utilitza un simulador ràpid electromagnètic planar, el qual es basa en el coneixement que es té del component sintetitzat. Finalment, en el Capítol 6, la metodologia de paràmetres S de mode mixt proposada i les eines CAD introduides s'utilitzen àmpliament en el disseny d'un amplificador de baix soroll “single-ended” a diferencial (LNA), mitjançant una tecnologia estàndard CMOS.L'amplificador de baix soroll és un dels components claus en un sistema de recepció de radio freqüència, ja que tendeix a dominar la sensibilitat i la figura de soroll (NF) de tot el sistema. D'altra banda, les característiques d'aquest circuit estan directament relacionades amb els components actius i passius disponibles en una tecnologia donada. Per tant, la tecnologia escollida, el factor de qualitat dels passius, i la forma com es caracteritzen tindran un alt impacte en les principals figures de mèrit del circuit real.
Beeravolu, Reddy Champak. "Écologie des communautés neutralistes : inférence des paramètres des modèles à l'aide de la composition spécifique en forêt tropicale." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20183.
Повний текст джерелаUnderstanding the dynamics of highly diverse communities such as tropical forests has always been a challenging task in ecology. Historically, simplified logistic models and complex niche theories have had a limited success in explaining the species diversity and composition in a tropical context. With the advent of neutral models, we have an original quantitative framework in terms of a sampling theory which opens new perspectives in the field of tropical community ecology. These parsimonious models originally developed from existing theories in population genetics, have a highly selective interpretation of niche theory defined as the functional equivalence of species which has been insufficiently explored. To begin with, we review recent advances of this extremely active field and provide insights into future developments of this theory. Further on, we provide a detailed account of parameter inference which is the crucial link between theoret ical models and field data. In addition, we improve on existing approaches by introducing a novel estimator for the parameter explaining the species richness found in these forests. These results are put into perspective by using field data from the wet evergreen forests of the Western Ghats region of India and the tropical rain forests around the Panama Canal Watershed. Our results are also rigorously tested using simulations of neutral community composition. Lastly, we provide insights into whether parameter inferences dealing with immigration correspond to the seed dispersal distances typically found in tropical forests
Essebbar, Abderrahman. "Séparation paramétrique des ondes en sismique." Phd thesis, Grenoble INPG, 1992. http://tel.archives-ouvertes.fr/tel-00785644.
Повний текст джерелаLibengue, Dobele-kpoka Francial Giscard Baudin. "Méthode non-paramétrique des noyaux associés mixtes et applications." Thesis, Besançon, 2013. http://www.theses.fr/2013BESA2007/document.
Повний текст джерелаWe present in this thesis, the non-parametric approach using mixed associated kernels for densities withsupports being partially continuous and discrete. We first start by recalling the essential concepts of classical continuousand discrete kernel density estimators. We give the definition and characteristics of these estimators. We also recall thevarious technical for the choice of smoothing parameters and we revisit the problems of supports as well as a resolutionof the edge effects in the discrete case. Then, we describe a new method of continuous associated kernels for estimatingdensity with bounded support, which includes the classical continuous kernel method. We define the continuousassociated kernels and we propose the mode-dispersion for their construction. Moreover, we illustrate this on the nonclassicalassociated kernels of literature namely, beta and its extended version, gamma and its inverse, inverse Gaussianand its reciprocal, the Pareto kernel and the kernel lognormal. We subsequently examine the properties of the estimatorswhich are derived, specifically, the bias, variance and the pointwise and integrated mean squared errors. Then, wepropose an algorithm for reducing bias that we illustrate on these non-classical associated kernels. Some simulationsstudies are performed on three types of estimators lognormal kernels. Also, we study the asymptotic behavior of thecontinuous associated kernel estimators for density. We first show the pointwise weak and strong consistencies as wellas the asymptotic normality. Then, we present the results of the global weak and strong consistencies using uniform andL1norms. We illustrate this on three types of lognormal kernels estimators. Subsequently, we study the minimaxproperties of the continuous associated kernel estimators. We first describe the model and we give the technicalassumptions with which we work. Then we present our results that we apply on some non-classical associated kernelsmore precisely beta, gamma and lognormal kernel estimators. Finally, we combine continuous and discrete associatedkernels for defining the mixed associated kernels. Using the tools of the unification of discrete and continuous analysis,we show the different properties of the mixed associated kernel estimators. All through this work, we choose thesmoothing parameter using the least squares cross-validation method
Samuel, Tomáš. "Vliv připojování disperzních zdrojů na DS 22 kV v dané oblasti a určení dopadů na provoz DS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218534.
Повний текст джерелаGraciá, Salgado Rogelio. "Diseño y caracterización de metamateriales acústicos basados en guías de onda." Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/38759.
Повний текст джерелаGraciá Salgado, R. (2014). Diseño y caracterización de metamateriales acústicos basados en guías de onda [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/38759
TESIS
Prudík, Jiří. "Model metropolitní optické sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217666.
Повний текст джерела"Testing dispersion parameters in generalized linear models." Chinese University of Hong Kong, 1990. http://library.cuhk.edu.hk/record=b5886615.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 1990.
Bibliography: leaves 69-71.
Chapter Chapter 1 --- Introduction --- p.1
Chapter Chapter 2 --- Generalized Linear Models --- p.7
Chapter §2.1 --- The Model --- p.7
Chapter §2.2 --- Estimation of the Parameters --- p.10
Chapter Chapter 3 --- Tests for the Dispersion Parameters --- p.15
Chapter S3.1 --- Three Asymptotically Equivalent Tests based on MLE --- p.15
Chapter §3.2 --- Application of the Tests for the Dispersion Parameters --- p.22
Chapter Chapter 4 --- Finite Sample Study of the Three Tests based on Simulation --- p.29
Chapter §4.1 --- Introduction --- p.29
Chapter §4.2 --- The Simulation --- p.31
Chapter §4.3 --- The Results --- p.34
Chapter Chapter 5 --- An Example --- p.38
Chapter Chapter 6 --- Conclusions and Discussions --- p.42
Tables
References