Дисертації з теми "Multipole decomposition"
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Cocle, Roger. "Combining the vortex-in-cell and parallel fast multipole methods for efficient domain decomposition simulations : DNS and LES approaches." Université catholique de Louvain, 2007. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-08172007-165806/.
Повний текст джерелаDal, Forno Massimo. "Theoretical and experimental analysis of interactions between electromagnetic fields and relativistic electrons in vacuum chamber." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8570.
Повний текст джерелаIl laser ad elettroni liberi (FEL) è una sorgente luminosa di quarta generazione che ha specifiche più stringenti rispetto alle sorgenti luminose di terza generazione, tra le quali ricordiamo i sincrotroni. La cosiddetta emittanza e la traiettoria del fascio determinano la qualità del fascio, e devono soddisfare severi requisiti nei FEL. Per esempio, nella sala ondulatori, la posizione del fascio deve essere misurata con risoluzione micrometrica. Il controllo della posizione del fascio può essere effettuato utilizzando i “Cavity Beam Position Monitor” (Cavity BPM). Questa tesi descrive l’attività di ricerca eseguita sui Cavity BPM. Precisamente, la progettazione, la simulazione elettromagnetica e l'ottimizzazione di un Cavity BPM sono state effettuate. Successivamente, 25 Cavity BPM sono stati fabbricati e installati nella sala ondulatori del progetto FERMI@Elettra. I segnali sono stati acquisiti e processati con un nuovo tipo di elettronica, e una serie di misure sono state effettuate. Il secondo dispositivo studiato in questo dottorato è l'acceleratore lineare di particelle. Tradizionali strutture acceleranti, dotate di un accoppiatore a singolo ingresso causano la degradazione delle proprietà fascio elettronico, a causa dell’ asimmetria del campo elettromagnetico. Un nuovo tipo di accoppiatore, con cortocircuito mobile, viene proposto, nel quale il campo elettrico è stato simmetrizzato. La progettazione, simulazione elettromagnetica e ottimizzazione del dispositivo sono state effettuate, e un prototipo della struttura accelerante è stato prodotto e sintonizzato. Il campo elettrico è stato misurato con il metodo bead-pull. Infine, in questa tesi sono descritti i deflettori RF ad alta energia, che sono degli strumenti di diagnostica in grado di misurare le proprietà fascio elettronico, in particolare la lunghezza del banco di elettroni e lo spazio longitudinale di fase.
The Free Electron Laser (FEL) is a fourth generation light source that has more stringent specifications with respect to the third generation light sources, such as synchrotrons. The so-called emittance and the beam trajectory determine the beam quality, and must satisfy stringent requirements in FELs. For example, in the undulator hall, the beam position must be measured with the micrometer resolution. The control in the beam position can be achieved using a cavity beam position monitor (Cavity BPM). This thesis describes the research performed on the cavity BPM. Precisely, the electromagnetic design, the simulation and the optimization of a cavity BPM have been carried out. Subsequently, 25 cavity BPMs have been manufactured and installed in the undulator hall of the FERMI@Elettra project. A new RF front-end has been set up, and a series of measurements have been performed. The second device studied in this PhD is the travelling wave linear accelerator. Traditional accelerating structures endowed with a single feed coupler cause degradation of the electron beam properties, due to the electromagnetic field asymmetry. A new type of single feed structure with movable short circuit is proposed, where the electric field has been symmetryzed. The electromagnetic design, simulation and optimization of the device have been carried out, and a prototype of the accelerating structure has been produced and tuned. The electric field has been measured with the bead-pull method. Finally, in this thesis are described the High Energy RF Deflector (HERFD), which are a fundamental diagnostic tool to measure the electron beam properties, in particular the bunch length and the longitudinal phase space.
XXV Ciclo
1984
Dal, Forno Massimo. "Theoretical and experimental analysis of interactions between electromagnetic fields and relativistic electrons in vacuum chamber." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8537.
Повний текст джерелаIl laser ad elettroni liberi (FEL) è una sorgente luminosa di quarta generazione che ha specifiche più stringenti rispetto alle sorgenti luminose di terza generazione, tra le quali ricordiamo i sincrotroni. La cosiddetta emittanza e la traiettoria del fascio determinano la qualità del fascio, e devono soddisfare severi requisiti nei FEL. Per esempio, nella sala ondulatori, la posizione del fascio deve essere misurata con risoluzione micrometrica. Il controllo della posizione del fascio può essere effettuato utilizzando i “Cavity Beam Position Monitor” (Cavity BPM). Questa tesi descrive l’attività di ricerca eseguita sui Cavity BPM. Precisamente, la progettazione, la simulazione elettromagnetica e l'ottimizzazione di un Cavity BPM sono state effettuate. Successivamente, 25 Cavity BPM sono stati fabbricati e installati nella sala ondulatori del progetto FERMI@Elettra. I segnali sono stati acquisiti e processati con un nuovo tipo di elettronica, e una serie di misure sono state effettuate. Il secondo dispositivo studiato in questo dottorato è l'acceleratore lineare di particelle. Tradizionali strutture acceleranti, dotate di un accoppiatore a singolo ingresso causano la degradazione delle proprietà fascio elettronico, a causa dell’ asimmetria del campo elettromagnetico. Un nuovo tipo di accoppiatore, con cortocircuito mobile, viene proposto, nel quale il campo elettrico è stato simmetrizzato. La progettazione, simulazione elettromagnetica e ottimizzazione del dispositivo sono state effettuate, e un prototipo della struttura accelerante è stato prodotto e sintonizzato. Il campo elettrico è stato misurato con il metodo bead-pull. Infine, in questa tesi sono descritti i deflettori RF ad alta energia, che sono degli strumenti di diagnostica in grado di misurare le proprietà fascio elettronico, in particolare la lunghezza del banco di elettroni e lo spazio longitudinale di fase.
The Free Electron Laser (FEL) is a fourth generation light source that has more stringent specifications with respect to the third generation light sources, such as synchrotrons. The so-called emittance and the beam trajectory determine the beam quality, and must satisfy stringent requirements in FELs. For example, in the undulator hall, the beam position must be measured with the micrometer resolution. The control in the beam position can be achieved using a cavity beam position monitor (Cavity BPM). This thesis describes the research performed on the cavity BPM. Precisely, the electromagnetic design, the simulation and the optimization of a cavity BPM have been carried out. Subsequently, 25 cavity BPMs have been manufactured and installed in the undulator hall of the FERMI@Elettra project. A new RF front-end has been set up, and a series of measurements have been performed. The second device studied in this PhD is the travelling wave linear accelerator. Traditional accelerating structures endowed with a single feed coupler cause degradation of the electron beam properties, due to the electromagnetic field asymmetry. A new type of single feed structure with movable short circuit is proposed, where the electric field has been symmetryzed. The electromagnetic design, simulation and optimization of the device have been carried out, and a prototype of the accelerating structure has been produced and tuned. The electric field has been measured with the bead-pull method. Finally, in this thesis are described the High Energy RF Deflector (HERFD), which are a fundamental diagnostic tool to measure the electron beam properties, in particular the bunch length and the longitudinal phase space.
XXV Ciclo
1984
Laffont, Pierre-Yves. "Intrinsic image decomposition from multiple photographs." Nice, 2012. http://www.theses.fr/2012NICE4060.
Повний текст джерелаEditing materials and lighting is a common image manipulation task that requires significant expertise to achieve plausible results. Each pixel aggregates the effect of both material and lighting, therefore standard color manipulations are likely to affect both components. Intrinsic image decomposition separates a photograph into independent layers : reflectance, which represents the color of the materials, and illumination, which encodes the effect of lighting at each pixel. In this thesis, we tackle this ill-posed problem by leveraging additional information provided by multiple photographs of the scene. We combine image-guided algorithms with sparse 3D information reconstructed from multi-view stereo, in order to constrain the decomposition. We first present an approach to decompose images of outdoor scenes, using photographs captured at a single time of day. This method not only separates reflectance from illumination, but also decomposes the illumination into sun, sky and indirect layers. We then develop a new method to extract lighting information about a scene only from a few images, thus simplifying the capture and calibration steps of our intrinsic decomposition. In the third part of this thesis, we focus on image collections gathered from photo-sharing websites or captured with a moving light source. We exploit the variations of lighting to process complex scenes without user assistance, not precise and complete geometry. The method described in this thesis enable advanced image manipulations such as lighting-aware editing, insertion of virtual objects, and image-based illumination transfer between photographs of a collection
Rajasekharan, Sabarinath. "The decomposition of multi robot systems : a human motor control perspective." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269653.
Повний текст джерелаJang, Young Jae 1974. "Multiple part type decomposition method in manufacturing processing line." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/89318.
Повний текст джерела"June 2001."
Includes bibliographical references (leaf 67).
by Young Jae Jang.
S.M.
Conway, Adrian E. "Decomposition methods and computational algorithms for multiple-chain closed queueing networks." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/4973.
Повний текст джерелаDray, Matthew William. "Effects of multiple environmental stressors on litter chemical composition and decomposition." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/68365/.
Повний текст джерелаSyrowicz, Diego A. (Syrowicz Gajnaj Diego Ariel) 1976. "Decomposition analysis of a deterministic, multi-part-type, multiple-failure-mode production line." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80128.
Повний текст джерелаIncludes bibliographical references (leaves 103-105).
by Diego A. Syrowicz.
M.Eng.
Araki, Sho. "Orthogonal transformation based algorithms for singular value decomposition." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263784.
Повний текст джерелаKeller, Brian. "Models and Methods for Multiple Resource Constrained Job Scheduling under Uncertainty." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/193630.
Повний текст джерелаIseric, Hamza. "BISER: fast characterization of segmental duplication structure in multiple genome assemblies." Thesis, Schloss Dagstuhl -- Leibniz-Zentrum für Informatik, 2021. http://hdl.handle.net/1828/13343.
Повний текст джерелаGraduate
Maier, Konradin, and Volker Stix. "A Semi-Automated Approach for Structuring Multi Criteria Decision Problems." Elsevier, 2013. http://dx.doi.org/10.1016/j.ejor.2012.10.018.
Повний текст джерелаMcKee, Alex Clive Seymoore. "Analytical solutions of orientation aggregation models, multiple solutions and path following with the Adomian decomposition method." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/7349.
Повний текст джерелаMetawe, Saad Abdel-Hamid. "The Prediction of Industrial Bond Rating Changes: a Multiple Discriminant Model Versus a Statistical Decomposition Model." Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc332370/.
Повний текст джерелаLiu, Xiaohua. "Anion-Peptide Adduct Formation and Decomposition As Studied by Fourier Transform Ion Cyclotron Resonance (FT-ICR) Mass Spectrometry." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1748.
Повний текст джерелаRasheed, Sarbast. "A Multiclassifier Approach to Motor Unit Potential Classification for EMG Signal Decomposition." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/934.
Повний текст джерелаThis thesis addresses the process of EMG signal decomposition by developing an interactive classification system, which uses multiple classifier fusion techniques in order to achieve improved classification performance. The developed system combines heterogeneous sets of base classifier ensembles of different kinds and employs either a one level classifier fusion scheme or a hybrid classifier fusion approach.
The hybrid classifier fusion approach is applied as a two-stage combination process that uses a new aggregator module which consists of two combiners: the first at the abstract level of classifier fusion and the other at the measurement level of classifier fusion such that it uses both combiners in a complementary manner. Both combiners may be either data independent or the first combiner data independent and the second data dependent. For the purpose of experimentation, we used as first combiner the majority voting scheme, while we used as the second combiner one of the fixed combination rules behaving as a data independent combiner or the fuzzy integral with the lambda-fuzzy measure as an implicit data dependent combiner.
Once the set of motor unit potential trains are generated by the classifier fusion system, the firing pattern consistency statistics for each train are calculated to detect classification errors in an adaptive fashion. This firing pattern analysis allows the algorithm to modify the threshold of assertion required for assignment of a motor unit potential classification individually for each train based on an expectation of erroneous assignments.
The classifier ensembles consist of a set of different versions of the Certainty classifier, a set of classifiers based on the nearest neighbour decision rule: the fuzzy k-NN and the adaptive fuzzy k-NN classifiers, and a set of classifiers that use a correlation measure as an estimation of the degree of similarity between a pattern and a class template: the matched template filter classifiers and its adaptive counterpart. The base classifiers, besides being of different kinds, utilize different types of features and their performances were investigated using both real and simulated EMG signals of different complexities. The feature sets extracted include time-domain data, first- and second-order discrete derivative data, and wavelet-domain data.
Following the so-called overproduce and choose strategy to classifier ensemble combination, the developed system allows the construction of a large set of candidate base classifiers and then chooses, from the base classifiers pool, subsets of specified number of classifiers to form candidate classifier ensembles. The system then selects the classifier ensemble having the maximum degree of agreement by exploiting a diversity measure for designing classifier teams. The kappa statistic is used as the diversity measure to estimate the level of agreement between the base classifier outputs, i. e. , to measure the degree of decision similarity between the base classifiers. This mechanism of choosing the team's classifiers based on assessing the classifier agreement throughout all the trains and the unassigned category is applied during the one level classifier fusion scheme and the first combiner in the hybrid classifier fusion approach. For the second combiner in the hybrid classifier fusion approach, we choose team classifiers also based on kappa statistics but by assessing the classifiers agreement only across the unassigned category and choose those base classifiers having the minimum agreement.
Performance of the developed classifier fusion system, in both of its variants, i. e. , the one level scheme and the hybrid approach was evaluated using synthetic simulated signals of known properties and real signals and then compared it with the performance of the constituent base classifiers. Across the EMG signal data sets used, the hybrid approach had better average classification performance overall, specially in terms of reducing the number of classification errors.
Kabeya, Kazuhisa III. "Structural Health Monitoring Using Multiple Piezoelectric Sensors and Actuators." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36709.
Повний текст джерелаMaster of Science
Mendoza, Michael A. "Water Fat Separation with Multiple-Acquisition Balanced Steady-State Free Precession MRI." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4304.
Повний текст джерелаChang, Chien Kuang Che. "Automated lung screening system of multiple pathological targets in multislice CT." Thesis, Evry, Institut national des télécommunications, 2011. http://www.theses.fr/2011TELE0021/document.
Повний текст джерелаThis research aims at developing a computer-aided diagnosis (CAD) system for fully automatic detection and classification of pathological lung parenchyma patterns in idiopathic interstitial pneumonias (IIP) and emphysema using multi-detector computed tomography (MDCT). The proposed CAD system is based on 3-D mathematical morphology, texture and fuzzy logic analysis, and can be divided into four stages: (1) a multi-resolution decomposition scheme based on a 3-D morphological filter was exploited to discriminate the lung region patterns at different analysis scales. (2) An additional spatial lung partitioning based on the lung tissue texture was introduced to reinforce the spatial separation between patterns extracted at the same resolution level in the decomposition pyramid. Then, (3) a hierarchic tree structure was exploited to describe the relationship between patterns at different resolution levels, and for each pattern, six fuzzy membership functions were established for assigning a probability of association with a normal tissue or a pathological target. Finally, (4) a decision step exploiting the fuzzy-logic assignments selects the target class of each lung pattern among the following categories: normal (N), emphysema (EM), fibrosis/honeycombing (FHC), and ground glass (GDG). The experimental validation of the developed CAD system allowed defining some specifications related with the recommendation values for the number of the resolution levels NRL = 12, and the CT acquisition protocol including the “LUNG” / ”BONPLUS” reconstruction kernel and thin collimations (1.25 mm or less). It also stresses out the difficulty to quantitatively assess the performance of the proposed approach in the absence of a ground truth, such as a volumetric assessment, large margin selection, and distinguishability between fibrosis and high-density (vascular) regions
RACIOPPI, STEFANO. "CHEMICAL BONDING IN METAL-ORGANIC SYSTEMS: NATURE, STRUCTURES AND PROPERTIES." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/606271.
Повний текст джерелаOkada, Daigo. "Decomposition of a set of distributions in extended exponential family form for distinguishing multiple oligo-dimensional marker expression profiles of single-cell populations and visualizing their dynamics." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263569.
Повний текст джерелаMatos, Luís Miguel de Oliveira. "Lossless compression algorithms for microarray images and whole genome alignments." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/14273.
Повний текст джерелаNowadays, in the 21st century, the never-ending expansion of information is a major global concern. The pace at which storage and communication resources are evolving is not fast enough to compensate this tendency. In order to overcome this issue, sophisticated and efficient compression tools are required. The goal of compression is to represent information with as few bits as possible. There are two kinds of compression, lossy and lossless. In lossless compression, information loss is not tolerated so the decoded information is exactly the same as the encoded one. On the other hand, in lossy compression some loss is acceptable. In this work we focused on lossless methods. The goal of this thesis was to create lossless compression tools that can be used in two types of data. The first type is known in the literature as microarray images. These images have 16 bits per pixel and a high spatial resolution. The other data type is commonly called Whole Genome Alignments (WGA), in particularly applied to MAF files. Regarding the microarray images, we improved existing microarray-specific methods by using some pre-processing techniques (segmentation and bitplane reduction). Moreover, we also developed a compression method based on pixel values estimates and a mixture of finite-context models. Furthermore, an approach based on binary-tree decomposition was also considered. Two compression tools were developed to compress MAF files. The first one based on a mixture of finite-context models and arithmetic coding, where only the DNA bases and alignment gaps were considered. The second tool, designated as MAFCO, is a complete compression tool that can handle all the information that can be found in MAF files. MAFCO relies on several finite-context models and allows parallel compression/decompression of MAF files.
Hoje em dia, no século XXI, a expansão interminável de informação é uma grande preocupação mundial. O ritmo ao qual os recursos de armazenamento e comunicação estão a evoluir não é suficientemente rápido para compensar esta tendência. De forma a ultrapassar esta situação, são necessárias ferramentas de compressão sofisticadas e eficientes. A compressão consiste em representar informação utilizando a menor quantidade de bits possível. Existem dois tipos de compressão, com e sem perdas. Na compressão sem perdas, a perda de informação não é tolerada, por isso a informação descodificada é exatamente a mesma que a informação que foi codificada. Por outro lado, na compressão com perdas alguma perda é aceitável. Neste trabalho, focámo-nos apenas em métodos de compressão sem perdas. O objetivo desta tese consistiu na criação de ferramentas de compressão sem perdas para dois tipos de dados. O primeiro tipo de dados é conhecido na literatura como imagens de microarrays. Estas imagens têm 16 bits por píxel e uma resolução espacial elevada. O outro tipo de dados é geralmente denominado como alinhamento de genomas completos, particularmente aplicado a ficheiros MAF. Relativamente às imagens de microarrays, melhorámos alguns métodos de compressão específicos utilizando algumas técnicas de pré-processamento (segmentação e redução de planos binários). Além disso, desenvolvemos também um método de compressão baseado em estimação dos valores dos pixéis e em misturas de modelos de contexto-finito. Foi também considerada, uma abordagem baseada em decomposição em árvore binária. Foram desenvolvidas duas ferramentas de compressão para ficheiros MAF. A primeira ferramenta, é baseada numa mistura de modelos de contexto-finito e codificação aritmética, onde apenas as bases de ADN e os símbolos de alinhamento foram considerados. A segunda, designada como MAFCO, é uma ferramenta de compressão completa que consegue lidar com todo o tipo de informação que pode ser encontrada nos ficheiros MAF. MAFCO baseia-se em vários modelos de contexto-finito e permite compressão/descompressão paralela de ficheiros MAF.
Odedo, Victor. "High resolution time reversal (TR) imaging based on spatio-temporal windows." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/high-resolution-time-reversal-tr-imaging-based-on-spatiotemporal-windows(f0589f73-901f-4de2-9886-7045b7f6cfd4).html.
Повний текст джерелаSartori, Lauriana Rúbio. "Informação polarimétrica PALSAR/ALOS aplicada à discriminação de espécies e estimação de parâmetros morfológicos de macrófitas /." Presidente Prudente : [s.n.], 2011. http://hdl.handle.net/11449/100252.
Повний текст джерелаAbstract: The purpose of this work was to evaluate the potential of fully polarimetric PALSAR data to discriminate and map macrophyte species in the Amazon floodplain, more specifically in the Monte Alegre Lake, in the state of Pará, Brazil. Fieldwork was carried out almost simultaneously to the radar acquisition. Three main species were found in the study area: Paspalum repens (PR), Hymenachne amplexicaulis (HA) and Paspalum elephantipes (PE). Macrophyte morphological variables were measured on the field and used to derive others variables, like the biomass. Attributes were calculated from the covariance matrix [C] derived from the SLC (single look complex) data. The polarimetric attributes were analyzed for the three species and it was identified that ones capable of discriminating them. The following classification approaches were applied: a rule-based classification, model-based classifications (Freeman-Durden and Cloude-Pottier), a statistical-based classification (supervised classification using Wishart distance measure) and a hybrid classification (Wishart classifier with the input classes based on the H/a plane). Finally, the morphological variable "stem volume" was modeled using multiple regression. The findings suggest that the fully polarimetric image has potential for discriminating plant species, being the main attributes sigma-nought HH ( ), sigma-nought HV ( ) and sigma-nought VV ( ), canopy structure index ( ), HH-VV polarimetric coherence ( ), helicity of the third scattering mechanism (τ ), orientation angle of the first scattering mechanism ( ) and scattering type phase of the first mechanism ( ); among the different classifications, only the supervised (Wishart) and the rule-based discriminated the species, with overall accuracy of 75,04% and 87,18%, respectively; the stem volume was modeled using the following attributes: biomass index ( ), volumetric scattering ... (Complete abstract click electronic access below)
Orientador: Nilton Nobuhiro Imai
Coorientador: José Cláudio Mura
Banca: Evlyn Marcia Leão de Moraes Novo
Banca: Thiago Sanna Freire Silva
Banca: João Roberto dos Santos
Banca: Vilma Mayumi Tachibana
Doutor
Silva, Maria Joseane Cruz da. "Imputação múltipla: comparação e eficiência em experimentos multiambientais." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-08082012-143901/.
Повний текст джерелаIn trials of genotypes by environment, the presence of absent values is common, due to the quantity of insufficiency of genotype application, making difficult for example, the process of recommendation of more productive genotypes, because for the application of the majority of the multivariate statistical techniques, a complete data matrix is required. Thus, methods that estimate the absent values from available data, known as imputation of data (simple and multiple) are applied, taking into consideration standards and mechanisms of absent data. The goal of this study is to evaluate the efficiency of multiple imputations free of distributions (IMLD) (BERGAMO et al., 2008; BERGAMO, 2007), compared with the Monte Carlo via Markov chain method of multiple imputation (IMMCMC), in the absent units present in trials of genotype interaction (25)environment (7). This data is provisional of random tests in blocks with Eucaluptus grandis cultures (LAVORANTI, 2003), of which random percentages of withdrawals (10%, 20%, 30%) were performed, with posterior imputation of the considered methods. The results obtained for each method show that, the relative efficiency in both percentages were maintained above 90%, being less for environmental (4) when imputed with an IMLD. The general measure of exactness, the measures where higher absent data occurred, was larger when absent values with an IMMCMC was imputed, as for the IMLD method, the varied absent values were lower at 20% for random withdrawals. Among results found, it is of sum importance to take into consideration the fact that the IMMCMC method considers it to be an assumption of normality, as for the IMLD method, it does not consider any restriction on the distribution of data, not on mechanisms and absent standards, which is an advantage on imputations.
Judd, Jason D. "Modeling and Analysis of a Feedstock Logistics Problem." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/26810.
Повний текст джерелаPh. D.
Neto, Raul Liberato de Lacerda. "Receptores MIMO baseados em algoritmo de decomposiÃÃo PARAFAC." Universidade Federal do CearÃ, 2005. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2032.
Повний текст джерелаEste trabalho tem como objetivo a aplicaÃÃo da anÃlise tensorial para o tratamento de sinais no domÃnio de comunicaÃÃes sem fio. Utilizando a decomposiÃÃo tensorial conhecida como PARAFAC (decomposiÃÃo por fatores paralelos), um receptor à modelado para um sistema de comunicaÃÃo sem fio que utiliza uma estrutura MIMO na qual cada antena transmissora possui um cÃdigo de espalhamento particular, baseado na tÃcnica de mÃltiplo acesso por divisÃo de cÃdigo (CDMA). Nesse trabalho sÃo analisadas duas estruturas receptoras baseadas na decomposiÃÃo PARAFAC. A primeira à baseada no conhecimento da matriz de cÃdigos de espalhamento e a segunda à baseada no conhecimento da matriz de seqÃÃncia de treinamento. Duas famÃlias de cÃdigos sÃo consideradas: cÃdigos de Hadamard-Walsh e cÃdigos de Hadamard-Walsh truncados. Como resultado, foi observado que os receptores propostos apresentaram rÃpida convergÃncia e foram capazes de eliminar todas as ambigÃidades, inclusive aquelas que sÃo intrÃnsecas à decomposiÃÃo PARAFAC, que foram observadas em outros trabalhos. Resultados de simulaÃÃo sÃo apresentados para comparar o desempenho das duas estruturas receptoras em diversas configuraÃÃes do sistema de comunicaÃÃo, revelando o impacto dos parÃmetros do sistema (nÃmero de antenas transmissoras, nÃmero de antenas receptoras, tamanho do cÃdigo e relaÃÃo sinal-ruÃdo).
This work deals with the application of multi-way analysis to the context of signal processing for wireless communications. A tensor decomposition known as PARAFAC (PARAllel FACtors) is considered in the design of multiple-input multiple-output (MIMO) receiver for a wireless communication system with Spread Spectrum codes. We propose two supervised PARAFAC-based receiver structures for joint symbol and channel estimation. The first one is based on the knowledge of the spreading codes and the second on the knowledge of a training sequence per transmit antenna. Two code structures are considered, which are Hadamard-Wash (HW) and Truncated Hadamard-Walsh (THW). The main advantages of the proposed PARAFAC receivers is on the fact that they exhibit fast convergence and eliminate all ambiguities inherent to the PARAFAC model. Simulation results are provided to compare the performances of the two receivers for several systems configurations, revealing the impact of the number of transmit antennas, number of receiver antennas, code length and signal to noise ratio in their performances.
Tolkkinen, M. (Mikko). "Biodiversity and ecosystem functioning in boreal streams:the effects of anthropogenic disturbances and naturally stressful environments." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526209043.
Повний текст джерелаTiivistelmä Biodiversiteetin väheneminen ja siitä seuraava ekosysteemin toiminnan heikkeneminen on eräs keskeisimmistä ekologisista kysymyksistä. Ekosysteemin toiminnot ovat kuitenkin monesti yhteydessä ympäristöolosuhteisiin, joten on vaikea erottaa vähentyneen biodiversiteetin ja ympäristöolojen suhteellista merkitystä ekosysteemien toimintoihin. Tässä väitöskirjatyössäni tutkin, kuinka virtavesien hajottajayhteisöt ja ekosysteemin toiminnot (lehtikarikkeen hajotus) muuttuvat valuma-alueen ihmistoimintojen myötä. Tutkin myös, kuinka luontainen stressi (matala pH) vaikuttaa yhteisöihin ja ekosysteemin toimintoihin. Tarkastelen myös akvaattisten sienten fylogeneettistä rakennetta ihmistoiminnan muuttamissa vesiympäristöissä. Osoitan tutkimuksissani, että ihmistoiminnoilla on vaikutuksia hajottajayhteisöiden kokonaisrunsauden jakautumiseen lajien kesken. Muutamien runsaiden lajien dominoimissa yhteisöissä lehtikarikkeen hajoaminen on tehokkaampaa kuin yhteisöissä, joissa lajien runsauserot ovat pienempiä. Myös ympäristöoloilla on vaikutus lehtikarikkeen hajotukseen. Luontaisesti happamissa puroissa metsäojituksen seurauksena lisääntynyt veden metallipitoisuus ja alhainen pH vähentävät hajotuksen määrää. Toisaalta joen korkea ravinnepitoisuus lisää hajotusta. Lehtikarikkeen hajotus vaihtelee enemmän vuosien välillä ihmistoimintojen muuttamissa virtavesissä kuin luonnontilaisissa vesissä. Toisaalta sieniyhteisöt pysyvät koostumukseltaan samankaltaisina vuosien välillä ihmistoiminnan muuttamissa paikoissa ja referenssipaikoissa. Tämä työ osoittaa, että toiminnallisten ja yhteisöihin perustuvien indikaattorien yhteiskäyttö antaa kokonaisvaltaisimman kuvan ihmistoimintojen vaikutuksesta virtavesien ekosysteemeihin
Barboteu, Mikaël. "Contact, frottement et techniques de calcul parallèle." Montpellier 2, 1999. http://www.theses.fr/1999MON20047.
Повний текст джерелаSartori, Lauriana Rúbio [UNESP]. "Informação polarimétrica PALSAR/ALOS aplicada à discriminação de espécies e estimação de parâmetros morfológicos de macrófitas." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/100252.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O propósito deste trabalho foi avaliar o potencial dos dados PALSAR polarimétricos para discriminar e mapear espécies de macrófitas (vegetação aquática) de uma área alagável da Amazônia, a planície de inundação do Lago Grande de Monte Alegre, no estado do Pará. A coleta de dados foi realizada quase simultaneamente à aquisição dos dados de radar. Três principais espécies de macrófitas foram encontradas na área: Paspalum repens (PR), Hymenachne amplexicaulis (HA) e Paspalum elephantipes (PE). Variáveis morfológicas foram medidas em campo e usadas para derivar outras variáveis tais como a biomassa. Atributos foram gerados a partir da matriz de covariância [C] extraída da imagem ALOS/PALSAR em modo SLC (single look complex). Os atributos polarimétricos foram analisados para as três espécies e identificados aqueles capazes de discriminar as espécies. Foram aplicadas as seguintes abordagens de classificação: baseada em regras, baseada em modelos de decomposição (Decomposições de Freeman-Durden e Cloude-Pottier), baseada em estatística (Classificação supervisionada baseada na distância Wishart) e híbrida (Classificador Wishart com classes de entrada baseadas na decomposição de Cloude-Pottier). Finalmente, a variável morfológica “volume da haste” foi modelada por regressão múltipla em função de alguns atributos polarimétricos. Os resultados sugerem que a imagem polarimétrica banda L possui potencial para discriminar as espécies de macrófitas, sendo os principais atributos para isso sigma zero HH ( ), sigma zero HV ( ) e sigma zero VV ( ), índice de estrutura da copa...
The purpose of this work was to evaluate the potential of fully polarimetric PALSAR data to discriminate and map macrophyte species in the Amazon floodplain, more specifically in the Monte Alegre Lake, in the state of Pará, Brazil. Fieldwork was carried out almost simultaneously to the radar acquisition. Three main species were found in the study area: Paspalum repens (PR), Hymenachne amplexicaulis (HA) and Paspalum elephantipes (PE). Macrophyte morphological variables were measured on the field and used to derive others variables, like the biomass. Attributes were calculated from the covariance matrix [C] derived from the SLC (single look complex) data. The polarimetric attributes were analyzed for the three species and it was identified that ones capable of discriminating them. The following classification approaches were applied: a rule-based classification, model-based classifications (Freeman-Durden and Cloude-Pottier), a statistical-based classification (supervised classification using Wishart distance measure) and a hybrid classification (Wishart classifier with the input classes based on the H/a plane). Finally, the morphological variable “stem volume” was modeled using multiple regression. The findings suggest that the fully polarimetric image has potential for discriminating plant species, being the main attributes sigma-nought HH ( ), sigma-nought HV ( ) and sigma-nought VV ( ), canopy structure index ( ), HH-VV polarimetric coherence ( ), helicity of the third scattering mechanism (τ ), orientation angle of the first scattering mechanism ( ) and scattering type phase of the first mechanism ( ); among the different classifications, only the supervised (Wishart) and the rule-based discriminated the species, with overall accuracy of 75,04% and 87,18%, respectively; the stem volume was modeled using the following attributes: biomass index ( ), volumetric scattering ... (Complete abstract click electronic access below)
Silva, Marcus Vinícius Amaral e. "Estrutura de renda, consumo e sistema produtivo: mudanças na economia brasileira entre 2000 e 2010." Universidade Federal de Juiz de Fora (UFJF), 2018. https://repositorio.ufjf.br/jspui/handle/ufjf/7188.
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O objetivo desta tese é analisar as mudanças na estrutura de rendimento, ocorridas na economia brasileira entre 2000 e 2010, e sua relação com as alterações nos padrões de consumo e as transformações na estrutura produtiva do país. Para isso, são elaboradas duas matrizes, por meio de um modelo de Matriz de Contabilidade Social (MCS), desagregada para 10 grupos familiares representativos. A estrutura de interdependência de renda entre as famílias é investigada por meio dos multiplicadores inter-relacionais de renda de Miyazawa. Já as mudanças na estrutura produtiva, entre 2000 e 2010, induzida por cada uma das 10 famílias típicas é investigada por meio de uma Análise de Decomposição Estrutural. Os principais resultados alcançados pela aplicação desses dos dois métodos apontam para uma relevante redução na renda absorvida pela última classe familiar, dado um choque exógeno de renda, ao longo do período de análise. Por outro lado, as famílias que fazem parte dos grupos de menor rendimento, tiveram aumento significativo na absorção de renda entre 2000 e 2010. O que pode ser explicado pelas transformações na estrutura de rendimentos, ocorridas principalmente em favor das classes familiares de menor renda, representadas sobretudo pela redução dos indicadores de desigualdade de renda. Isso implica que, políticas de transferência de renda, como o Bolsa Família, e as mudanças no mercado de trabalho, observada principalmente por meio do aumento do salário mínimo real, passaram a gerar maiores benefícios às camadas mais pobres da população. Já a análise de decomposição estrutural indica que os grupos familiares com menor rendimento médio foram aqueles que mais contribuíram para o aumento da produção observada no período. Esse resultado sugere que o crescimento da renda, associado a novos padrões de consumo, está intimamente ligado aos avanços produtivos entre 2000 e 2010.
The aim of this thesis is to analyze the changes in the structure of income that occurred in the Brazilian economy between 2000 and 2010, and it's relation with the changes in patterns of consumption and the transformations in the productive structure of the country. To achieve this objective, two matrices are elaborated, using a Social Accounting Matrix (SAM) model, disaggregated for 10 representative households groups. The structure of income interdependence among households is investigated through Miyazawa's interrelational income multipliers. The changes in the productive structure, between 2000 and 2010, induced by each one of the 10 typical families are investigated through a Structural Decomposition Analysis (SDA). The main results point to a significant reduction in the income absorbed by the last household, given an exogenous income shock, throughout the period of analysis. On the other hand, the families that are part of the lower income groups had a significant increase in income absorption between 2000 and 2010. This can be explained by the changes in income structure, mainly in favor of lower income households, mainly represented by the reduction of income inequality indicators. This implies that income transfer policies, such as Bolsa Família, and changes in the labor market, observed mainly through the increase of the real minimum wage, generated greater benefits to the poorest sections of the population. On the other hand, the analysis of structural decomposition indicates that the household groups with the lowest average income were the ones that contributed the most to the production increase observed in the period. This result suggests that income growth and the rise of a new middle class, with new patterns of consumption, are closely linked to the productive advances between 2000 and 2010.
Pavelski, Lucas Marcondes. "Otimização evolutiva multiobjetivo baseada em decomposição e assistida por máquinas de aprendizado extremo." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1254.
Повний текст джерелаMany real optimization problems have more than one objective function. When the objectives are in conflict, there is a need for specialized strategies, as is the case of the Multi-objective Optimization Evolutionary Algorithms (MOEAs). However, if the functions evaluation is expensive (high computational or economical costs) many proposed MOEAs are impractical. An alternative might be the use of a machine learning model to approximate the fitness function (surrogates) in the optimization algorithm. This work proposes and investigates a framework called ELMOEA/D that aggregates state-of-the-art MOEAs based on decomposition of objectives (MOEA/D) and extreme learning machines as surrogate models. The proposed framework is tested with different MOEA/D variants and show good results in benchmark problems, compared to a literature algorithm that also encompasses MOEA/D but uses surrogate models based on radial basis function networks. The ELMOEA/D framework is also applied to the protein structure prediction problem (PSPP). Despite the fact that the results achieved by the proposed approach were not as encouraging as the ones achieved in the benchmarks (when the algorithms with and without surrogates are compared), many aspects of both algorithm and problem are explored. Finally, the ELMOEA/D framework is applied to an alternative formulation of the PSPP and the results lead to various directions for future works.
Kapfunde, Goodwell. "Near-capacity sphere decoder based detection schemes for MIMO wireless communication systems." Thesis, University of Hertfordshire, 2013. http://hdl.handle.net/2299/11350.
Повний текст джерела"Combining the vortex-in-cell and parallel fast multipole methods for efficient domain decomposition simulations : DNS and LES approaches." Université catholique de Louvain, 2007. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-08172007-165806/.
Повний текст джерелаAbduljabbar, Mustafa. "Communication Reducing Approaches and Shared-Memory Optimizations for the Hierarchical Fast Multipole Method on Distributed and Many-core Systems." Diss., 2018. http://hdl.handle.net/10754/630221.
Повний текст джерелаLin, Jenq-Jong, and 林正忠. "Multiple star decomposition of complete multigraphs and some decompositions of crowns." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/58221114818367737081.
Повний текст джерела國立中央大學
數學研究所
87
This thesis consists of two topics: (1) the decomposition of complete multigraphs into multiple stars and (2) some decompositions of crowns. (1) Decomposition of complete multigraphs into multiple stars: In Chapter 2, we give a criterion for the decomposition of complete multigraphsλKn into multiple stars (not necessarily isomorphic). Further we give a criterion for the decomposition of 2Kn into isomorphic multiple stars. (2) Some decompositions of crowns: In Chapter 3, we give a criterion for the decomposition of a multicrown into isomorphic stars. As a consequence, we obtain a criterion for the decomposition of the power of a cycle into isomorphic stars. In Chapter 4, we give some sufficient conditions for the decomposition of the crown into cycles. In Chapter 5, we investigate the decomposition numbers of the crown, which include the tree number, biclique number and star arboricity.
He, Ying active 2013. "Decomposition of multiple attribute preference models." 2013. http://hdl.handle.net/2152/22980.
Повний текст джерелаtext
"Structural decomposition of multiple time scale Markov processes." Laboratory for Information and Decision Systems, Massachusetts Institute of Technology], 1987. http://hdl.handle.net/1721.1/3021.
Повний текст джерелаCaption title. "October 1987."
Includes bibliographical references.
Supported in part by a grant from the Air Force Office of Scientific Research. AFOSR-82-0258 Supported in part by a grant from the Army Research Office. DAAG-29-84-K005
Kao, Huei-Yuan, and 高慧媛. "Multiple Group signature with Threshold authorization and Document Decomposition." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/968su8.
Повний текст джерела國立臺灣科技大學
資訊管理系
106
In recent years, many large-scale integrated projects have been launched, a large and complex integrated project document contains multiple departments responsible for different domians, when the project is running, all departments need to sign the professional domains involved. In order to solve the trivial and complicated signing of each department in the large-scale project document, and ensuring that the entire document is signed, will not be tampered with, so the study was proposed. Proposed the Multiple Group signature with Threshold authorization and Document Decomposition, through document segmentation the departments are responsible for signing the responsibility. Each department signs the document with different Thresholds authorization of Elliptic Curves Digital Signatures. The final output of the organization is a multi-group signature with multiple Elliptic Curves Digital Signatures. The seal can only allow external receivers to verify that signature is from the organization, and receivers is impossible to know who is signed by those departments.This study comply with Federal Information Processing Standards (FIPS) requirements of the U.S. federal government three security provisions for digital signatures: Authentication, Integrity, and Non-repudiation.
Lu, Ting-You, and 陸亭佑. "Modified Gram-Schmidt-based QR decomposition Hardware Architecture and Implementation for Multiple-Input Multiple-Output System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/73480903740726606402.
Повний текст джерела雲林科技大學
電子與資訊工程研究所
99
In recent years, due to the increasing use of wireless communications in applications such as cell phone video and multimedia downloads, high-speed wireless communication is necessary to be applied. An improved implementation of QR decomposition for Multiple-Input Multiple-Output Orthogonal frequency-division multiplexing (MIMO-OFDM) detection which is based on the Gram-Schmidt method is used in this thesis. In wireless communication systems, the accuracy for transmitting signals is essential. In this thesis, we present a preprocessing MIMO signal detection circuit architecture and FPGA implementation based on Triangular Systolic Array QRD (TSAQRD) which can approach near-ML performance with a fixed computational complexity. The thesis presents a dual-mode-process (DMP) hardware and it works on the 8 × 8 16 QAM MIMO systems.
Yan, Wei-Jhih, and 顏威志. "Decomposition of a Finite Product of Multiples ofRiemann Zeta Values." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/95073135094788108345.
Повний текст джерела國立中正大學
數學研究所
103
The classical Euler decomposition theorem expresses a product of two Riemann zeta values as a weighted sum of double Euler sums. Such a decomposition theorem can be generalized to a finite product of Riemann zeta values and of multiple zeta values of height one. In this thesis, we investigate a decomposition of the product in its theoretical form. In particular, we will illustrate its explicit decomposition for the cases of n = 3 and 4 in terms of weighted sums of multiple zeta values.
Zhang, Zhenyu, and Stanley B. Gershwin. "Modeling and Analysis of Manufacturing Systems with Multiple-Loop Structures." 2005. http://hdl.handle.net/1721.1/29836.
Повний текст джерелаSingapore-MIT Alliance (SMA)
Abeysundera, Melanie. "Phylogenetic analysis of multiple genes based on spectral methods." 2011. http://hdl.handle.net/10222/14310.
Повний текст джерелаGhosh, Shaunak. "Multiple suppression in the t-x-p domain." 2013. http://hdl.handle.net/2152/23207.
Повний текст джерелаtext
ZHANG, SHI-PENG, and 張世鵬. "A study on the application of decomposition principle to multiple parallelly serial-connected reservoirs." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/58609782880032429542.
Повний текст джерелаWu, Kuo-Hao, and 吳國豪. "SIMULTANEOUS TEMPLATE ASSIGNMENT AND LAYOUT DECOMPOSITION USING MULTIPLE BCP MATERIALS IN DSA-MP LITHOGRAPHY." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/yvc3a6.
Повний текст джерела國立臺灣科技大學
電機工程系
105
In sub 10-nm technology nodes, the directed selfassembly technology with multiple patterning lithography (DSA-MP) is a promising solution for contact/via layer fabrication. However, previous studies using multiple patterning with a single block copolymer (BCP) material still suffer from low via manufacturability due to limited types of feasible guiding templates. To mitigate the problem, multiple patterning in combination with two different BCP materials has been proposed, which contributes to more flexible DSA-compatible pattern matching. In this paper, we propose the first work of simultaneous guiding template assignment and layout decomposition with multiple BCP materials for general via layouts in DSA-MP. An optimal integer linear programming (ILP) formulation and a practical and sophisticated heuristic algorithm are proposed. Experimental results indicate that adopting two different BCP materials can greatly reduce conflict numbers compared with existing works using a single BCP material, and the proposed heuristic method can efficiently obtain good solutions.
Hasbullah, Hasbullah. "Alleviating the negative effect of salinity on soil respiration by plant residue addition: effect of residue properties, mixing and amendment frequency." Thesis, 2015. http://hdl.handle.net/2440/102766.
Повний текст джерелаThesis (Ph.D.) (Research by Publication) -- University of Adelaide, School of Agriculture, Food and Wine, 2015.
Lu, Chi-Hsuan, and 呂霽軒. "Application of constrained independent component analysis and empirical mode decomposition to diagnose synchronous multiple bearing faults." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/x44dsg.
Повний текст джерела國立中興大學
機械工程學系所
106
This study investigates the diagnosis of multiple faults that occur concurrently in the bearing through empirical mode decomposition and constrained independent component analysis. The vibration measurements are first decomposed into several intrinsic modal functions through the empirical mode decomposition method. The intrinsic mode functions that present obvious amplitude modulation phenomenon are selected to synthesize a new signal. The constrained independent component analysis is employed to extract the signal component which is highly correlated to the bearing fault features. The fast Fourier transform is utilized to obtain the frequency-domain features of the faulted signal, and the extracted features are compared with the one derived from the theoretical characteristics. The time-domain and frequency-domain characteristics of this independent component are quantified for the intelligent diagnosis through the support vector machine classifier.
Lassaux, G., and Karen E. Willcox. "Model reduction for active control design using multiple-point Arnoldi methods." 2003. http://hdl.handle.net/1721.1/3702.
Повний текст джерелаSingapore-MIT Alliance (SMA)