Dissertations / Theses on the topic 'M-statistics'
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Fluck, Elody [Verfasser], and M. [Akademischer Betreuer] Kunz. "Hail statistics for European countries / Elody Fluck ; Betreuer: M. Kunz." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1153828693/34.
Full textAduba, Chukwuemeka Nnabuife. "N-Player Statistical Nash Game Control: M-th Cost Cumulant Optimization." Diss., Temple University Libraries, 2014. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/298838.
Full textPh.D.
Game theory is the study of tactical interactions involving conflicts and cooperations among multiple decision makers called players with applications in diverse disciplines such as economics, biology, management, communication networks, electric power systems and control. This dissertation studies a statistical differential game problem where finite N players optimize their system performance by shaping the distribution of their cost function through cost cumulants. This research integrates game theory with statistical optimal control theory and considers a statistical Nash non-cooperative nonzero-sum game for a nonlinear dynamic system with nonquadratic cost functions. The objective of the statistical Nash game is to find the equilibrium solution where no player has the incentive to deviate once other players maintain their equilibrium strategy. The necessary condition for the existence of the Nash equilibrium solution is given for the m-th cumulant cost optimization using the Hamilton-Jacobi-Bellman (HJB) equations. In addition, the sufficient condition which is the verification theorem for the existence of Nash equilibrium solution is given for the m-th cumulant cost optimization using the Hamilton-Jacobi-Bellman (HJB) equations. However, solving the HJB equations even for relatively low dimensional game problem is not trivial, we propose to use neural network approximate method to find the solution of the HJB partial differential equations for the statistical game problem. Convergence proof of the neural network approximate method solution to exact solution is given. In addition, numerical examples are provided for the statistical game to demonstrate the applicability of the proposed theoretical developments.
Temple University--Theses
Berta, Zachory Kaczmarczyk. "Super-Earth and Sub-Neptune Exoplanets: a First Look from the MEarth Project." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:10833.
Full textAstronomy
Lewis, John Robert. "Bayesian Restricted Likelihood Methods." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407505392.
Full textSavatovic, Anita, and Mejra Cakic. "Estimating Optimal Checkpoint Intervals Using GPSS Simulation." Thesis, Linköping University, Department of Mathematics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8558.
Full textIn this project we illustrate how queueing simulation may be used to find the optimal interval for checkpointing problems and compare results with theoretical computations for simple systems that may be treated analytically.
We consider a relatively simple model for an internet banking facility. From time to time, the application server breaks down. The information at the time of the breakdown has to be passed onto the back up server before service may be resumed. To make the change over as efficient as possible, information of the state of user’s accounts is saved at regular intervals. This is known as checkpointing.
Firstly, we use GPSS (a queueing simulation tool) to find, by simulation, an optimal checkpointing interval, which maximises the efficiency of the server. Two measures of efficiency are considered; the availability of the server and the average time a customer spends in the system. Secondly, we investigate how far the queueing theory can go to providing an analytic solution to the problem and see whether or not this is in line with the results obtained through simulation.
The analysis shows that checkpointing is not necessary if breakdowns occur frequently and log reading after failure does not take much time. Otherwise, checkpointing is necessary and the analysis shows how GPSS may be used to obtain the optimal checkpointing interval. Relatively complicated systems may be simulated, where there are no analytic tools available. In simple cases, where theoretical methods may be used, the results from our simulations correspond with the theoretical calculations.
Kouamo, Olaf. "Analyse des séries chronologiques à mémoire longue dans le domaine des ondelettes." Phd thesis, Paris, Télécom ParisTech, 2011. https://pastel.hal.science/pastel-00565656.
Full textThe theme of our work focuses on statistical process long memory, for which we propose and validate tools statistics from the wavelet analysis. In recent years these methods for estimating the memory setting became very popular. However, rigorously validating the theoretical results estimators for semiparametric models classic long memory are new (cf. The articles by E. Moulines, F. Roueff and M. Taqqu since 2007). The results we propose in this thesis are a direct extension of this work. We have proposed a test procedure for detecting changes on the generalized spectral density. In the wavelet domain, the test becomes a test of change in the variance of wavelet coefficients. We then developed an algorithm for fast computation of covariance matrix of wavelet coefficients. Two applications of this algorithm are proposed, first to estimate d and the other part to improve the test proposed in the previous chapter. Finally, we studied the robust estimators of the memory parameter in the wavelet domain, based on three estimators of the variance of wavelet coefficients at scale. The major contribution of this chapter is the central limit theorem obtained for three estimators in the context of Gaussian processes M (d)
Kouamo, Olaf. "Analyse des séries chronologiques à mémoire longue dans le domaine des ondelettes." Phd thesis, Télécom ParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00565656.
Full textElizalde, Torrent Sergi. "Consecutive patterns and statistics on restricted permutations." Doctoral thesis, Universitat Politècnica de Catalunya, 2004. http://hdl.handle.net/10803/5839.
Full textDesprés d'introduir algunes definicions sobre subseqüències i estadístics en permutacions i camins de Dyck, comencem estudiant la distribució dels estadístics -nombre de punts fixos' i -nombre d'excedències' en permutacions que eviten una subseqüència de longitud 3. Un dels resultats principals és que la distribució conjunta d'aquest parell de paràmetres és la mateixa en permutacions que eviten 321 que en permutacions que eviten 132. Això generalitza un teorema recent de Robertson, Saracino i Zeilberger. Demostrem aquest resultat donant una bijecció que preserva els dos estadístics en qüestió i un altre paràmetre. La idea clau consisteix en introduir una nova classe d'estadístics en camins de Dyck, basada en el que anomenem túnel.
A continuació considerem el mateix parell d'estadístics en permutacions que eviten simultàniament dues o més subseqüències de longitud 3. Resolem tots els casos donant les funcions generadores corresponents. Alguns casos són generalitzats a subseqüències de longitud arbitrària. També descrivim la distribució d'aquests paràmetres en involucions que eviten qualsevol subconjunt de subseqüències de longitud 3. La tècnica principal consisteix en fer servir bijeccions entre permutacions amb subseqüències prohibides i certs tipus de camins de Dyck, de manera que els estadístics en permutacions que considerem corresponen a estadístics en camins de Dyck que són més fàcils d'enumerar.
Tot seguit presentem una nova família de bijeccions del conjunt de camins de Dyck a sí mateix, que envien estadístics que apareixen en l'estudi de permutacions amb subseqüències prohibides a estadístics clàssics en camins de Dyck, la distribució dels quals s'obté fàcilment. En particular, això ens dóna una prova bijectiva senzilla de l'equidistribució de punts fixos en les permutacions que eviten 321 i en les que eviten 132. A continuació donem noves interpretacions dels nombres de Catalan i dels nombres de Fine. Considerem una classe de permutacions definida en termes d'aparellaments de 2n punts en una circumferència sense creuaments. N'estudiem l'estructura i algunes propietats, i donem la distribució de diversos estadístics en aquests permutacions.
En la següent part de la tesi introduïm una noció diferent de subseqüències prohibides, amb el requeriment que els elements que formen la subseqüència han d'aparèixer en posicions consecutives a la permutació. Més en general, estudiem la distribució del nombre d'ocurrències de subparaules (subseqüències consecutives) en permutacions. Resolem el problema en diversos casos segons la forma de la subparaula, obtenint-ne les funcions generadores exponencials bivariades corresponents com a solucions de certes equacions diferencials lineals. El mètode està basat en la representació de permutacions com a arbres binaris creixents i en mètodes simbòlics.
La part final tracta de subseqüències generalitzades, que extenen tant la noció de subseqüències clàssiques com la de subparaules. Per algunes subseqüències obtenim nous resultats enumeratius. Finalment estudiem el comportament assimptòtic del nombre de permutacions de mida n que eviten una subseqüència generalitzada fixa quan n tendeix a infinit. També donem fites inferiors i superiors en el nombre de permutacions que eviten certes subseqüències.
Nardini, C. "STATISTICS IN CLINICAL TRIALS: OUT OF CONDITION. SOME PROBLEMS OF UNCONDITIONAL INFERENCEAT THE CROSSROADS OF METHODOLOGY AND ETHICS." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/218889.
Full textZhang, Zongjun. "Adaptive Robust Regression Approaches in data analysis and their Applications." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1445343114.
Full textNguyen, Thi Mong Ngoc. "Estimation récursive pour les modèles semi-paramétriques." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2010. http://tel.archives-ouvertes.fr/tel-00938607.
Full textPun, Man-chi, and 潘敏芝. "M out of n bootstrap for nonstandard M-estimation: consistency and robustness." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29833590.
Full textHou, Yunkui. "Stochastic optimal control of G/M/1 queueing system with breakdowns /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487694702782079.
Full textZhan, Yihui. "Bootstrapping functional M-estimators /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/8958.
Full textTra, Yolande. "A study of nonparametric estimation of location using L-, M- and R-estimators." Virtual Press, 1994. http://liblink.bsu.edu/uhtbin/catkey/917018.
Full textDepartment of Mathematical Sciences
Cheung, Kar-yee, and 張家愉. "Iteration of m out of n bootstrap in non-regular cases." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B26652432.
Full text宗錦軒 and Kam-hin Chung. "A study of M-out-of-N bootstrap approaches to construction of confidence sets." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B3121521X.
Full textChung, Kam-hin. "A study of M-out-of-N bootstrap approaches to construction of confidence sets /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19853038.
Full textZhang, Yi. "Statistical analyses of transcriptomic responses of M. tuberculosis under environmental stresses." Thesis, Birkbeck (University of London), 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499179.
Full textNeves, Vasco. "Étude sur les paramétres stellaires des naines M et leur lien à la formation planétaire." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENY082/document.
Full textAt the time of writing of this Thesis more than 900 planets have been announced and about 2700 planets from the Kepler space telescope are waiting to be confirmed. The very precise spectra and light curves obtained in Doppler and transit surveys, allows the in-depth study of the parameters of the host stars, and opens the possibility to investigate the star-plant correlations. Also, determining the stellar parameters with precision is critical for more precise determinations of the planetary parameters, namely, mass, radius, and density.In the case of the FGK dwarfs, the determination of stellar parameters is well established and can be used with confidence to study the star-planet relation as well as to obtain precise planetary parameters. However, this is not the case for M dwarfs, the most common stars in the Galaxy. Compared to their hotter cousins, M dwarfs are smaller, colder, and fainter, and therefore harder to study. The biggest challenge regarding M dwarfs is related to the presence of billions of molecular lines that depress the continuum making a classical spectral analysis almost impossible. Finding new and innovative ways to overcome this obstacle in order to obtain precise stellar parameters is the goal of this Thesis.To achieve this goal I focused my research into two main avenues: photometric and spectroscopic methods. My initial work had the objective of establishing a precise photometric metallicity calibration, but I could not reach this goal, as I did not have enough FGK+M binaries with good photometric data. However, it was possible, with the available data, to compare the already established photometric calibrations and slightly improve the best one, as described in Chapter 3.Then, I focused on spectroscopic approaches with the aim of obtaining precise M dwarf parame- ters. To this end I used HARPS high-resolution spectra and developed a method to measure the spectral lines disregarding the continuum completely. Using this method I established a new visible calibration with a precision of 0.08 dex for [Fe/H] and 80 K for Te f f . This work is detailed in Chapter 4.Finally, I also participated in the refinement of the parameters of the star GJ3470 and its planet, where my expertise in stellar parameters of M dwarfs had an important role. The details regarding this investigation are shown in Chapter 5
No momento em que escrevo esta Tese, o número de planetas anunciados já ultrapassou os 900 e os cerca de 2700 candidatos detectados pelo telescópio espacial Kepler esperam por confirmação. Os espectros e as curvas de luz obtidos nos programas de procura de planetas permitem, também, o estudo em profundidade dos parâmetros das estrelas com planetas e abrem a possibilidade de investigar a relação estrela-planeta. Neste contexto, a determinação com precisão dos parâmetros estelares é crítica na determinação precisa dos parâmetros planetários, nomeadamente, a massa, o raio e a densidade.No caso das anãs FGK, os métodos de determinação dos parâmetros estelares estão bem estabelecidos e podem ser usados com confiança no estudo da relação estrela-planeta, assim como na obtenção de parâmetros planetários precisos. No entanto, não é esse o caso para as anãs M, as estrelas mais comuns da nossa Galáxia. Ao contrário das suas primas, as estrelas M são mais pequenas, frias e ténues e, assim sendo, mais difíceis de estudar. O grande entrave no estudo das estrelas M está relacionado com a presença de biliões de linhas moleculares que deprimem o contínuo espectral, fazendo com que uma análise espectral clássica se torne quase impossível. A procura de métodos inovadores que possibilitem ultrapassar este obstáculo, tendo em vista a obtenção de parâmetros precisos, é o objectivo desta Tese.Tendo em conta esse objetivo, foquei os meus esforços em duas linhas principais de pesquisa, baseadas em métodos fotométricos e métodos espectroscópicos. O meu trabalho inicial tinha como objetivo o estabelecimento de uma calibração fotométrica para a metalicidade, mas não me foi possível atingir esse objetivo, pois não tinha sistemas binários FGK+M suficientes com bons dados fotométricos. No entanto, foi possível, com os dados disponíveis, comparar as calibrações fotométricas existentes e refinar ligeiramente a melhor delas, como descrito no Capítulo 3.Após este trabalho passei a concentrar-me em técnicas espectroscópicas de obtenção de parâmetros estelares em estrelas M. Tendo em mente esse objetivo, usei espectros HARPS de alta resolução para desenvolver um novo método de medição de linhas espectrais independente do contínuo espectral. Seguidamente, usei este método no desenvolvimento de uma nova calibração de metalicidade e temperatura efectiva em estrelas M na região do visível, através da qual consegui atingir uma precisão de 0.08 dex para a [Fe/H] e de 80 K para a temperatura. Este trabalho está descrito no Capítulo 4.Ao mesmo tempo colaborei na determinação com precisão dos parâmetros da estrela GJ3470 e do seu planeta, onde a minha proficiência na determinação de parâmetros estelares em anãs M teve um papel importante. Os detalhes relacionados com este trabalho de investigação estão descritos no Capítulo 5
Wallmark, Joakim. "Selection bias when estimating average treatment effects in the M and butterfly structures." Thesis, Umeå universitet, Statistik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160792.
Full textKällberg, David. "Nonparametric Statistical Inference for Entropy-type Functionals." Doctoral thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-79976.
Full textRiou-Durand, Lionel. "Theoretical contributions to Monte Carlo methods, and applications to Statistics." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG006/document.
Full textThe first part of this thesis concerns the inference of un-normalized statistical models. We study two methods of inference based on sampling, known as Monte-Carlo MLE (Geyer, 1994), and Noise Contrastive Estimation (Gutmann and Hyvarinen, 2010). The latter method was supported by numerical evidence of improved stability, but no theoretical results had yet been proven. We prove that Noise Contrastive Estimation is more robust to the choice of the sampling distribution. We assess the gain of accuracy depending on the computational budget. The second part of this thesis concerns approximate sampling for high dimensional distributions. The performance of most samplers deteriorates fast when the dimension increases, but several methods have proven their effectiveness (e.g. Hamiltonian Monte Carlo, Langevin Monte Carlo). In the continuity of some recent works (Eberle et al., 2017; Cheng et al., 2018), we study some discretizations of the kinetic Langevin diffusion process and establish explicit rates of convergence towards the sampling distribution, that scales polynomially fast when the dimension increases. Our work improves and extends the results established by Cheng et al. for log-concave densities
Barkino, Iliam. "Summary Statistic Selection with Reinforcement Learning." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-390838.
Full textHaman, John T. "The energy goodness-of-fit test and E-M type estimator forasymmetric Laplace distributions." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1524756256837676.
Full textParolini, Giuditta <1978>. ""Making Sense of Figures": Statistics, Computing and Information Technologies in Agriculture and Biology in Britain, 1920s-1960s." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5289/1/Parolini_Giuditta_Tesi.pdf.
Full textParolini, Giuditta <1978>. ""Making Sense of Figures": Statistics, Computing and Information Technologies in Agriculture and Biology in Britain, 1920s-1960s." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5289/.
Full textRiou-Durand, Lionel. "Theoretical contributions to Monte Carlo methods, and applications to Statistics." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG006.
Full textThe first part of this thesis concerns the inference of un-normalized statistical models. We study two methods of inference based on sampling, known as Monte-Carlo MLE (Geyer, 1994), and Noise Contrastive Estimation (Gutmann and Hyvarinen, 2010). The latter method was supported by numerical evidence of improved stability, but no theoretical results had yet been proven. We prove that Noise Contrastive Estimation is more robust to the choice of the sampling distribution. We assess the gain of accuracy depending on the computational budget. The second part of this thesis concerns approximate sampling for high dimensional distributions. The performance of most samplers deteriorates fast when the dimension increases, but several methods have proven their effectiveness (e.g. Hamiltonian Monte Carlo, Langevin Monte Carlo). In the continuity of some recent works (Eberle et al., 2017; Cheng et al., 2018), we study some discretizations of the kinetic Langevin diffusion process and establish explicit rates of convergence towards the sampling distribution, that scales polynomially fast when the dimension increases. Our work improves and extends the results established by Cheng et al. for log-concave densities
Huck, Matthias Verfasser], Hermann [Akademischer Betreuer] [Ney, and Alexander M. [Akademischer Betreuer] Fraser. "Statistical models for hierarchical phrase-based machine translation / Matthias Huck ; Hermann Ney, Alexander M. Fraser." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1195151713/34.
Full textHuck, Matthias [Verfasser], Hermann [Akademischer Betreuer] Ney, and Alexander M. [Akademischer Betreuer] Fraser. "Statistical models for hierarchical phrase-based machine translation / Matthias Huck ; Hermann Ney, Alexander M. Fraser." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1195151713/34.
Full textBormann, Carsten [Verfasser], and M. [Akademischer Betreuer] Schienle. "Multivariate Extremes in Financial Markets: New Statistical Testing Methods and Applications / Carsten Bormann ; Betreuer: M. Schienle." Karlsruhe : KIT-Bibliothek, 2017. http://d-nb.info/112603679X/34.
Full textBlanc, Sebastian M. [Verfasser], and T. [Akademischer Betreuer] Setzer. "Bias-Variance Aware Integration of Judgmental Forecasts and Statistical Models / Sebastian M. Blanc ; Betreuer: T. Setzer." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/112049818X/34.
Full textBarilli, Elisa. "When 1 in 200 is higher than 5 in 1000: the "1 in X effect" on the perceived probability of having a Down syndrome-affected child." Doctoral thesis, University of Trento, 2010. http://eprints-phd.biblio.unitn.it/399/1/TESI_Barilli_UNITN_Eprints.pdf.
Full textCARCAGNÌ, ANTONELLA. "Una specificazione semiparametrica del modello di regressione M-Quantile ad effetti casuali con applicazioni a dati ambientali georeferenziati." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2017. http://hdl.handle.net/10281/180711.
Full textIn this work a M-quantile regression approach (Breckling and Chambers, 1988) is proposed to evaluate their impact at different level of the response variable. In particular, we extend the basic M-quantile model to include a spatial component in addition to other covariates. The spatial component is modelled by combining a random intercept (Chambers and Tzavidis, 2006) to catch the lithology effect on IRC and a semiparametric term, which is expected to grasp residual regularities across space (Pratesi et al. 2009). The flexible component is modeled via a thin-plate bivariate spline of the geographical coordinates (longitude and latitude) of the sampling sites. Akin to Ruppert et al. (2003), we propose to treat the coefficients of the knots of the bivariate spline as a further random component in order to obtain smoother results. A robust maximum likelihood approach (Richardson and Welsh, 1995) has been adopted to estimate the model using the two-stage algorithm proposed by Tzavidis et al. (2015). Three model-based simulations were carried out to confirm estimation and predictives performance and to compare the semiparametric M-Quantile random effect with alternative approach at the problem. The model is applied to a sample of IRC measures collected in two successive radon campaigns in Lombardy.
Ximenes, Lucas Cunha. "Avalia??o de m?todos de agrupamento para a classifica??o da capacidade produtiva de um trecho da Floresta Nacional do Tapaj?s ? PA." UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1380.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
O estudo teve como objetivo definir a melhor combina??o de m?todo de agrupamento com medida de similaridade para a classificar a capacidade produtiva de um trecho na Floresta Nacional do Tapaj?s. O invent?rio florestal amostral foi realizado no ano de 2012 e para a loca??o das parcelas foram abertas 12 faixas de, aproximadamente, 1,5 m de largura, equidistantes 4,0 km, na dire??o leste-oeste, e com comprimento variando de 4 km a 13,75 km. A instala??o das parcelas, com dimens?es de 30 x 250 m, distribu?das sistematicamente por 500 m em cada linha. Foi levado em considera??o para a defini??o das classes de tamanho (CT): CT 1 (classe de regenera??o) - 10 cm ? DAP < 25 cm nos primeiros 50 m da parcela (30 m x 50 m); CT 2 (classe de crescimento) - 25 cm ? DAP < 50 cm nos primeiros 100 m (30 m x 100 m); e CT 3 (classe de colheita) - DAP ? 50 cm em toda a parcela (30 m x 250 m). Para a classifica??o da capacidade produtiva, realizou-se um filtro no banco de dados original por classe de tamanho, no qual foram selecionados os indiv?duos com qualidade de fuste 1 (fuste reto) e 2 (fuste com pequenas tortuosidades) e que t?m valor no mercado regional. As 204 parcelas foram agrupadas em grupos homog?neos, no qual foram produzidos 40 dendrogramas do tipo vertical para cada uma das 3 classes de tamanho (totalizando 120 dendrogramas), baseados na combina??o de 5 medidas de dist?ncia (Euclidiana Simples, Euclidiana Quadrada, Manhattan, Canberra e Mahalanobis), com 8 m?todos de agrupamento hier?rquicos, sendo: Ward1, Ward2 Liga??o Simples, Liga??o Completa, UPGMA, WPGMA, Mediana e Centroide. Com o intuito de verificar a valida??o dos m?todos de agrupamento testados, foram confeccionadas 120 tabelas de an?lise discriminante linear de Fisher, sendo 40 para cada classe de tamanho, contendo as probabilidades para cada classe de estoque, bem como a porcentagem de classifica??o das combina??es testadas na an?lise de agrupamento. As an?lises de agrupamento e discriminante possibilitaram estratificar as parcelas heterog?neas de uma floresta inequi?nea em ?reas com parcelas homog?neas em termos de volume, densidade b?sica da madeira e grupo de comercializa??o. A combina??o entre medida de dist?ncia de Manhattan e m?todo de Ward2 mostrou-se ser a mais eficiente para estratificar florestas inequi?neas em classes de estoque volum?trico.
Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016.
The study aimed to determine the best combination of clustering method with similarity measure to classify the productive capacity of a stretch at Tapaj?s National Forest. The sample forest inventory was carried out in 2012 and for plot allocations we opened 12 tracks of approximately 1.5 m wide, 4.0 km equidistant in east-west direction, and length ranging from 4 km to 13.75 km. The plot installation, with dimensions of 30 x 250 m, systematically distributed in 500 m in each row. We took into account for the definition of size classes (CT): CT 1 (regeneration class) - 10 cm ? DBH <25 cm in the first 50 m of the plot (30 m x 50 m); CT 2 (growth class) - 25 cm ? DBH <50 cm in the first 100 m (30 m x 100 m); and CT 3 (harvesting class) - DBH ? 50 cm in the whole plot (30 m x 250 m). For the classification of productive capacity, there was a filter in the original database by size class, in which individuals were selected with bole quality 1 (straight bole) and 2 (bole with small tortuosities) and which have value in the regional market. The 204 plots were grouped into homogeneous groups, which were produced 40 dendrograms of the vertical type for each of the three size classes (totaling 120 dendrograms), based on the combination of five measures of distance (Euclidean Simple, Squared Euclidean, Manhattan, Canberra and Mahalanobis) with 8 hierarchical clustering methods, namely: Ward1, Ward2 Simple Link, Complete Link, UPGMA, WPGMA, Median and Centroid. In order to check the validation of the tested clustering methods, we produced 120 Fisher linear discriminant analysis tables, with 40 for each size class containing the probabilities for each stock class as well as the percentage of the combinations tested in the cluster analysis. The cluster and discriminant analysis made it possible to stratify the heterogeneous plots of a native forest in areas with homogeneous portions in terms of volume, wood density and commercialization group. The combination of measure distance of Manhattan and Ward2 method proved to be the most efficient to stratify uneven-aged stands in forest stock volume classes.
Alhumaidi, Mouhammad [Verfasser], Abdelhak M. [Akademischer Betreuer] Zoubir, and Harald [Akademischer Betreuer] Klingbeil. "Statistical Signal Processing Techniques for Coherent Transversal Beam Dynamics in Synchrotrons / Mouhammad Alhumaidi. Betreuer: Abdelhak M. Zoubir ; Harald Klingbeil." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2015. http://d-nb.info/1111112657/34.
Full textBassene, Aladji. "Contribution à la modélisation spatiale des événements extrêmes." Thesis, Lille 3, 2016. http://www.theses.fr/2016LIL30039/document.
Full textIn this thesis, we investigate nonparametric modeling of spatial extremes. Our resultsare based on the main result of the theory of extreme values, thereby encompass Paretolaws. This framework allows today to extend the study of extreme events in the spatialcase provided if the asymptotic properties of the proposed estimators satisfy the standardconditions of the Extreme Value Theory (EVT) in addition to the local conditions on thedata structure themselves. In the literature, there exists a vast panorama of extreme events models, which are adapted to the structures of the data of interest. However, in the case ofextreme spatial data, except max-stables models, little or almost no models are interestedin non-parametric estimation of the tail index and/or extreme quantiles. Therefore, weextend existing works on estimating the tail index and quantile under independent ortime-dependent data. The specificity of the methods studied resides in the fact that theasymptotic results of the proposed estimators take into account the spatial dependence structure of the relevant data, which is far from trivial. This thesis is then written in thecontext of spatial statistics of extremes. She makes three main contributions.• In the first contribution of this thesis, we propose a new approach of the estimatorof the tail index of a heavy-tailed distribution within the framework of spatial data. This approach relies on the estimator of Hill (1975). The asymptotic properties of the estimator introduced are established when the spatial process is adequately approximated by aspatial M−dependent process, spatial linear causal process or when the process satisfies a strong mixing condition.• In practice, it is often useful to link the variable of interest Y with covariate X. Inthis situation, the tail index depends on the observed value x of the covariate X and theunknown fonction (.) will be called conditional tail index. In most applications, the tailindexof an extreme value is not the main attraction, but it is used to estimate for instance extreme quantiles. The contribution of this chapter is to adapt the estimator of the tail index introduced in the first part in the conditional framework and use it to propose an estimator of conditional extreme quantiles. We examine the models called "fixed design"which corresponds to the situation where the explanatory variable is deterministic. To tackle the covariate, since it is deterministic, we use the window moving approach. Westudy the asymptotic behavior of the estimators proposed and some numerical resultsusing simulated data with the software "R".• In the third part of this thesis, we extend the work of the second part of the framemodels called "random design" for which the data are spatial observations of a pair (Y,X) of real random variables . In this last model, we propose an estimator of heavy tail-indexusing the kernel method to tackle the covariate. We use an estimator of the conditional tail index belonging to the family of the estimators introduced by Goegebeur et al. (2014b)
Stellet, Jan Erik [Verfasser], and J. M. [Akademischer Betreuer] Zöllner. "Statistical modelling of algorithms for signal processing in systems based on environment perception / Jan Erik Stellet. Betreuer: J. M. Zöllner." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1108451160/34.
Full textAzawi, Mayce al [Verfasser], and Thomas M. [Akademischer Betreuer] Breuel. "Statistical Language Modeling for Historical Documents using Weighted Finite-State Transducers and Long Short-Term Memory / Mayce Al Azawi. Betreuer: Thomas M Breuel." Kaiserslautern : Technische Universität Kaiserslautern, 2015. http://d-nb.info/1068504137/34.
Full textColombo, Alessio. "Socially aware motion planning of assistive robots in crowded environments." Doctoral thesis, University of Trento, 2015. http://eprints-phd.biblio.unitn.it/1396/1/colombo_phd_thesis.pdf.
Full textLeite, Paixao Edmilson <1966>. "Transição de egressos evadidos e diplomados da educação profissional técnica para o mundo do trabalho: situação e perfis ocupacionais de 2006 a 2010." Doctoral thesis, Università Ca' Foscari Venezia, 2013. http://hdl.handle.net/10579/6502.
Full textABSTRACT This PhD Thesis is a theoretical, quantitative, and exploratory research that investigates the professional profiles of students from 37 secondary professional schools from Brazilian Vocational Education Network, throughout Minas Gerais State. This research was done in Brazil and in Italy - co-supervision thesis -, by means an international agreement signed between Universidade Federal de Minas Gerais, and the Ca' Foscari University of Venice. The investigation was also supported by the Brazilian Federal Research Agencies . The micro data collection was done using two different sets of questionnaires, applied from 2011 to 2013, to subjects in two main samples: 762 dropouts and 742 graduated students from secondary Professional Education. The micro data, extracted from primary sources, were related to the academic period from 2006 to 2010. About the research problem, it was a key element for this study the establishment of subjects' occupational profiles and the connections of those final profiles to the pathways in their transition from school to work. The Philosophy of Praxis' categories established by Scholars Antonio Gramsci, in Italy, and Karl Heinrich Marx, in Germany, were set as the main theoretical framework for this thesis in a historical, political and economical view. In this thesis, an important educational argument was presented considering different scholars that argue for different school organizations: the duality school versus the unitarian school; the separation or not between the academic and vocational tracks. Based on the theoretical argument established between school qualification versus competencies, it was also possible to present two different types of occupational stratification systems used today. Methodologically, two quantitative analytical dimensions were used: 1) the Theoretical and Conceptual Model of High School Performance (California University - UCSB scholars - USA); 2) a table with simple and composite variables. In that way, those two dimensions allowed us to draw three different student occupational profiles: sociodemografic and economical, educational, and occupational. By testing two complementary hypothesis, this research concluded that the vocational students that graduated had significantly better occupational profiles than those of the dropouts, both in 2006 and 2011. From the two samples of students, 76% came from the low economic Brazilian classes, had been studying in public schools and they continued working in the same area of their vocational formation. This research also identified a key point: the thesis results, using a comparative sample analysis, showed to be valid for the N population of the Brazilian Federal Vocational Education System, of 189.988 students. Finally, the research allowed us to identify three hierarchies of factors statistically associated to the students' decisions to choose, and to dropout, and to conclude their vocational courses. Footnote: CNPq: Brazilian National Counsel of Technological and Scientific Development. CAPES: Brazilian Coordination for the Improvement of Higher Education Personnel. INEP: Brazilian Institute for Studies and Educational Research.
RESUMO Esta tese de doutorado é uma pesquisa teórica, quantitativa e exploratória que investiga os perfis profissionais de alunos oriundos de 37 escolas secundárias da Rede Federal de Educação Profissional no Brasil, espalhadas por todo o Estado de Minas Gerais. A investigação foi desenvolvida no Brasil e na Itália - cotutela de tese -, a partir de um acordo internacional firmado entre a Universidade Federal de Minas Gerais e a Università Ca' Foscari Venezia. A investigação foi financiada por agências de pesquisa federais brasileiras. A coleta de microdados foi feita por meio de dois questionários distintos, aplicados, de 2011 a 2013, a sujeitos de duas amostras principais: 762 jovens que abandonaram a escola e 742 alunos formados em escolas secundárias Profissionais. Os microdados, extraídos de fontes primárias, eram referentes ao período acadêmico de 2006 a 2010. Sobre o problema de pesquisa, constituiu-se em um elemento chave deste estudo o traçado dos perfis ocupacionais finais destes dois grupos de indivíduos, assim como as conexões de seus perfis com os itinerários de sua transição escola-trabalho. As categorias da Filosofia da Práxis, desenvolvidas pelos estudiosos Antonio Gramsci, na Itália, e Karl Heinrich Marx, na Alemanha, foram definidas para esta tese como o principal referencial teórico em uma visão histórica, política e econômica. Estabeleceu-se um debate educacional entre distintos teóricos que defendem diferentes organizações escolares: a dualidade escolar X a escola unitária; separação ou não entre formação geral e formação profissional. Noutro debate teórico, qualificação X competências, foi possível também apresentar dois diferentes tipos de sistemas de estratificação ocupacional na atualidade. Na metodologia, foram usadas como dimensões de análise quantitativa: 1) o Modelo Teórico e Conceitual de Desempenho Escolar e Estudantil no Ensino Médio (autores da Universidade da Califórnia - UCSB - EUA); 2) uma tabela de variáveis simples e compostas. Assim, estas dimensões permitiram traçar três tipos de perfis profissionais dos alunos: sociodemográfico e econômico, educacional e profissional. Ao testar dois tipos complementares de hipótese, a pesquisa concluiu que os alunos formados no ensino profissional secundário tinham um perfil ocupacional significativamente melhor do que o daqueles que abandonaram a escola, tanto em 2006, quanto em 2011. Das duas amostras de estudantes, 76% vêm de classes econômicas baixas, estudaram em escolas públicas e estão trabalhando em áreas afins à formação profissional recebida na escola. Um ponto-chave é que os resultados da tese demonstraram-se válidos, por análises amostrais comparativas, também para a população N de 189.988 estudantes em todo o Brasil. Finalmente, a investigação permitiu o estabelecimento de três distintas hierarquias de fatores estatisticamente associados às decisões dos alunos de escolher, de abandonar e de concluir seus cursos técnicos. Footnote: CNPq: Brazilian National Counsel of Technological and Scientific Development. CAPES: Brazilian Coordination for the Improvement of Higher Education Personnel. INEP: Brazilian Institute for Studies and Educational Research.
Massias, Mathurin. "Sparse high dimensional regression in the presence of colored heteroscedastic noise : application to M/EEG source imaging." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLT053.
Full textUnderstanding the functioning of the brain under normal and pathological conditions is one of the challenges of the 21textsuperscript{st} century.In the last decades, neuroimaging has radically affected clinical and cognitive neurosciences.Amongst neuroimaging techniques, magneto- and electroencephalography (M/EEG) stand out for two reasons: their non-invasiveness, and their excellent time resolution.Reconstructing the neural activity from the recordings of magnetic field and electric potentials is the so-called bio-magnetic inverse problem.Because of the limited number of sensors, this inverse problem is severely ill-posed, and additional constraints must be imposed in order to solve it.A popular approach, considered in this manuscript, is to assume spatial sparsity of the solution: only a few brain regions are involved in a short and specific cognitive task.Solutions exhibiting such a neurophysiologically plausible sparsity pattern can be obtained through L21-penalized regression approaches.However, this regularization requires to solve time-consuming high-dimensional and non-smooth optimization problems, with iterative (block) proximal gradients solvers.% Issues of M/EEG: noise:Additionally, M/EEG recordings are usually corrupted by strong non-white noise, which breaks the classical statistical assumptions of inverse problems. To circumvent this, it is customary to whiten the data as a preprocessing step,and to average multiple repetitions of the same experiment to increase the signal-to-noise ratio.Averaging measurements has the drawback of removing brain responses which are not phase-locked, ie do not happen at a fixed latency after the stimuli presentation onset.%Making it faster.In this work, we first propose speed improvements of iterative solvers used for the L21-regularized bio-magnetic inverse problem.Typical improvements, screening and working sets, exploit the sparsity of the solution: by identifying inactive brain sources, they reduce the dimensionality of the optimization problem.We introduce a new working set policy, derived from the state-of-the-art Gap safe screening rules.In this framework, we also propose duality improvements, yielding a tighter control of optimality and improving feature identification techniques.This dual construction extrapolates on an asymptotic Vector AutoRegressive regularity of the dual iterates, which we connect to manifold identification of proximal algorithms.Beyond the L21-regularized bio-magnetic inverse problem, the proposed methods apply to the whole class of sparse Generalized Linear Models.%Better handling of the noiseSecond, we introduce new concomitant estimators for multitask regression.Along with the neural sources estimation, concomitant estimators jointly estimate the noise covariance matrix.We design them to handle non-white Gaussian noise, and to exploit the multiple repetitions nature of M/EEG experiments.Instead of averaging the observations, our proposed method, CLaR, uses them all for a better estimation of the noise.The underlying optimization problem is jointly convex in the regression coefficients and the noise variable, with a ``smooth + proximable'' composite structure.It is therefore solvable via standard alternate minimization, for which we apply the improvements detailed in the first part.We provide a theoretical analysis of our objective function, linking it to the smoothing of Schatten norms.We demonstrate the benefits of the proposed approach for source localization on real M/EEG datasets.Our improved solvers and refined modeling of the noise pave the way for a faster and more statistically efficient processing of M/EEG recordings, allowing for interactive data analysis and scaling approaches to larger and larger M/EEG datasets
Simpson, Daniel Peter. "Krylov subspace methods for approximating functions of symmetric positive definite matrices with applications to applied statistics and anomalous diffusion." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/29751/1/Simpson_Final_Thesis.pdf.
Full textSimpson, Daniel Peter. "Krylov subspace methods for approximating functions of symmetric positive definite matrices with applications to applied statistics and anomalous diffusion." Queensland University of Technology, 2008. http://eprints.qut.edu.au/29751/.
Full textDorigoni, Alessia. "An eye tracking exploration of cognitive reflection in consumer decision-making." Doctoral thesis, Università degli studi di Trento, 2019. https://hdl.handle.net/11572/368835.
Full textDorigoni, Alessia. "An eye tracking exploration of cognitive reflection in consumer decision-making." Doctoral thesis, University of Trento, 2019. http://eprints-phd.biblio.unitn.it/3792/1/TESI-DEFINITIVA-DORIGONI.pdf.
Full textSantolin, Chiara. "Learning Regularities from the Visual World." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424417.
Full textIl mondo sensoriale è composto da un insieme di regolarità. Sequenze di sillabe e note musicali, oggetti disposti nell’ambiente visivo e sequenze di eventi sono solo alcune delle tipologie di pattern caratterizzanti l’input sensoriale. La capacità di rilevare queste regolarità risulta fondamentale per l’acquisizione di alcune proprietà del linguaggio naturale (ad esempio, la sintassi), l’apprendimento di sequenze di azioni (ad esempio, il linguaggio dei segni), la discriminazione di eventi ambientali complessi come pure la pianificazione del comportamento. Infatti, rilevare regolarità da una molteplicità di eventi permette di anticipare e pianificare azioni future, aspetti cruciali di adattamento all’ambiente. Questo meccanismo di apprendimento, riportato in letteratura con il nome di statistical learning, consiste nella rilevazione di distribuzioni di probabilità da input sensoriali ovvero, relazioni di dipendenza tra i suoi diversi componenti (ad esempio, X predice Y). Come illustrato nell capitolo introduttivo della presente ricerca, nonostante si tratti di uno dei meccanismi responsabili dell’apprendimento del linguaggio naturale umano, lo statistical learning non sembra essersi evoluto in modo specifico per servire questa funzione. Tale meccanismo rappresenta un processo cognitivo generale che si manifesta in diversi domini sensoriali (acustico, visivo, tattile), modalità (temporale oppure spaziale-statico) e specie (umana e non-umane). La rilevazione di pattern gioca quindi un ruolo fondamentale nell’elaborazione dell’informazione sensoriale, necessaria ad una corretta rappresentazione dell’ambiente. Una volta apprese le regolarità e le strutture presenti nell’ambiente, gli organismi viventi devono saper generalizzare tali strutture a stimoli nuovi da un punto di vista percettivo, ma rappresentanti le stesse regolarità. L’aspetto cruciale della generalizzazione è quindi la capacità di riconoscere una regolarità familiare anche quando implementata da nuovi stimoli. Anche il processo di generalizzazione ricopre un ruolo fondamentale nell’apprendimento della sintassi del linguaggio naturale umano. Ciò nonostante, si tratta di un meccanismo dominio-generale e non specie-specifico. Ciò che non risultava chiaro dalla letteratura era l’ontogenesi di entrambi i meccanismi, specialmente nel dominio visivo. In altre parole, non era chiaro se le abilità di statistical learning e generalizzazione di strutture visive fossero completamente sviluppate alla nascita. Il principale obbiettivo degli esperimenti condotti in questa tesi era quindi quello di approfondire le origini di visual statistical learning e generalizzazione, tramite del pulcino di pollo domestico (Gallus gallus) come modello animale. Appartenendo ad una specie precoce, il pulcino neonato è quasi completamente autonomo per una serie di funzioni comportamentali diventando il candidato ideale per lo studio dell’ontogenesi di diverse abilità percettive e cognitive. La possibilità di essere osservato appena dopo la nascita, e la completa manipolazione dell’ambiente pre- e post- natale (tramite schiusa e allevamento in condizioni controllate), rende il pulcino un’ottimo modello sperimentale per lo studio dell’apprendimento di regolarità. La prima serie di esperimenti illustrati erano allo studio di statistical learning (Chapter 2). Tramite un paradigma sperimentale basato sull’apprendimento per esposizione (imprinting filiale), pulcini neonati naive dal punto di vista visivo, sono stati esposti ad una video-sequenza di elementi visivi arbitrari (forme geometriche). Tale stimolo è definito da una struttura “statistica” basata su transitional (conditional) probabilities che determinano l’ordine di comparsa di ciascun elemento (ad esempio, il quadrato predice la croce con una probabilità del 100%). Al termine della fase di esposizione, i pulcini riuscivano a riconoscere tale sequenza, discriminandola rispetto a sequenze non-familiari che consistevano in una presentazione random degli stessi elementi (ovvero nessun elemento prediceva la comparsa di nessun altro elemento; Experiment 1) oppure in una ricombinazione degli stessi elementi familiari secondo nuovi pattern statistici (ad esempio, il quadrato predice la T con probabilità del 100% ma tale relazione statistica non era mai stata esperita dai pulcini; Experiment 2). In entrambi gli esperimenti i pulcini discriminarono la sequenza familiare da quella non-familiare, dimostrandosi in grado di riconoscere il struttura statistica alla quale erano stati esposti durante la fase d’imprinting. Uno degli aspetti più affascinanti di questo risultato è che il processo di apprendimento è non-supervisionato ovvero nessun rinforzo era stato dato ai pulcini durante la fase di esposizione. Successivamente, sono stati condotti altri due esperimenti (Experiments 3 and 4) con l’obbiettivo di verificare se i pulcini fossero in grado di apprendere regolarità più complesse di quelle testate in precedenza. In particolare, il compito che dovevano svolgere i pulcini consisteva nel differenziare una sequenza familiare strutturata similmente a quella appena descritta e una sequenza non-familiare composta da part-pairs ovvero coppie di figure composte dall’unione dell’ultima figura componente una coppia familiare e la prima figura componente un’altra coppia familiare. Essendo formate dall’unione di elementi appartenenti a coppie familiari, le part-pairs venivano esperite dai pulcini durante la fase di familiarizazzione ma con una probabilità più bassa rispetto alle pairs. La difficoltà del compito risiede quindi nel rilevare una sottile differenza caratterizzante la distribuzione di probabilità dei due stimoli. Sfortunatamente i pulcini non sono stati in grado di discriminare le due sequenze ne quando composte da 8 elementi (Experiment 3) ne da 6 (Experiment 4). L’obbiettivo finale di questi due esperimenti sarebbe stato quello di scoprire il tipo di regolarità appresa dai pulcini. Infatti, negli esperimenti 1 e 2 i pulcini potrebbero aver discriminato sequenze familiari e non familiari sulla base delle frequenze di co-occorrenza delle figure componenti le coppie familiari (ad esempio, co-occorrenza di X e Y) piuttosto che sulle probabilità condizionali (ad esempio, X predice Y). Tuttavia, non avendo superato il test presentato negli esperimenti 3 e 4, la questione riguardante quale tipo di cue statistico viene appreso da questa specie rimane aperta. Possibili spiegazioni e implicazioni teoriche di tale risultato non significativo sono discusse nel capitolo conclusivo. Il secondo gruppo di esperimenti condotti nella presente ricerca riguarda l’indagine del processo di generalizzazione di regolarità visive (Chapter 3). Le regolarità indagate sono rappresentate come stringhe di figure geometriche organizzate spazialmente, i cui elementi sono visibili simultaneamente. Ad esempio, la regolarità definita come AAB viene descritta come una tripletta in cui i primi due elementi sono identici tra loro (AA), seguiti da un’altro elemento diverso dai precedenti (B). I pattern impiegati erano AAB, ABA (Experiment 5) ABB e BAA (Experiment 6) e la procedura sperimentale utilizzata prevedeva addestramento tramite rinforzo alimentare. Una volta imparato a riconoscere il pattern rinforzato (ad esempio, AAB implementato da croce-croce-cerchio) da quello non rinforzato (ad esempio, ABA implementato da croce-cerchio-croce), i pulcini dovevano riconoscere tali strutture rappresentate da nuovi elementi (ad esempio, clessidra-clessidra-freccia vs. clessidra-freccia-clessidra). Gli animali si dimostrarono capaci di generalizzare tutte le regolarità a nuovi esemplari delle stesse. L’aspetto più importante di questi risultati è quanto dimostrato nell’esperimento 6, il cui obbiettivo era quello di indagare le possibili strategie di apprendimento messe in atto dagli animali nello studio precedente. Infatti, considerando il confronto AAB vs. ABA, i pulcini potrebbero aver riconosciuto (e generalizzato) il pattern familiare sulla base della presenza di una ripetizione consecutiva di uno stesso elemento (presente in AAB ma non in ABA, dove lo stesso elemento A è ripetuto e posizionato ai due estremi della tripletta). Nell’esperimento 6 sono state quindi confrontate regolarità caratterizzate da ripetizioni: AAB vs. ABB e AAB vs. BAA. I pulcini si mostrarono comunque in grado di distinguere le nuove regolarità e di generalizzare a nuovi esemplari, suggerendo come tale abilità non sia limitata a un particolare tipo di configurazione. Complessivamente, i risultati ottenuti nella presente ricerca costituiscono la prima evidenza di statistical learning e generalizzazione di regolarità visive in un modello animale osservato appena dopo la nascita. Per quanto riguarda lo statistical learning, i pulcini dimostrano capacità comparabili a quelle osservate in altre specie animali e agli infanti umani ma apparentemente superiori a quelle osservate nel neonato. Ipotesi e implicazioni teoriche di tali differenze sono riportate nel capitolo conclusivo. Per quanto riguarda i processi di generalizzazione, la performance dei pulcini è in linea con quanto dimostrato dai neonati umani nel dominio linguistico. Alla luce di questi risultati, è plausibile pensare che il pulcino si biologicamente predisposto ad rilevare regolarità caratterizzanti il suo ambiente visivo, a partire dai primi momenti di vita.
Last, Carsten [Verfasser], and Dr Ing Wahl Friedrich M. [Akademischer Betreuer] Prof. "From Global to Local Statistical Shape Priors - Novel methods to obtain accurate reconstruction results with a limited amount of training shapes / Carsten Last ; Betreuer: Friedrich M. Prof. Dr.-Ing. Wahl." Braunschweig : Technische Universität Braunschweig, 2016. http://d-nb.info/117581816X/34.
Full textSORGENTE, ANGELA. "BENESSERE FINANZIARIO DEI GIOVANI ADULTI: QUALI METODOLOGIE DI RICERCA E TECNICHE STATISTICHE SONO NECESSARIE?" Doctoral thesis, Università Cattolica del Sacro Cuore, 2018. http://hdl.handle.net/10280/39103.
Full textThe general aim of this research work is to enrich the literature on emerging adults’ financial well-being with research methodologies and statistical techniques never previously applied in this research field. Specifically, the first chapter of this thesis concerns the scoping methodology, a knowledge synthesis methodology that I adopted to identify the emerging adults’ financial well-being definition, components, predictors and outcomes. The second chapter consists in the application of a new statistical technique, Latent Transition Analysis, that I used to identify subgroups of emerging adults homogeneous in their configuration of adult social markers already reached and to investigate the relation between these emerging adults’ subgroups and their financial well-being. The third chapter describes a three-step methodology to develop and validate new measurement instruments, based on the contemporary view of validity proposed in the last fifty years. This three-step procedure was here applied to develop and validate a new instrument measuring subjective financial well-being for an emerging adult target population. Finally, the fourth chapter concerns the multiple informant methodology that I applied to collect information about family financial socialization and its impact on the child’s financial well-being from mother, father and the emerging adult child.
SORGENTE, ANGELA. "BENESSERE FINANZIARIO DEI GIOVANI ADULTI: QUALI METODOLOGIE DI RICERCA E TECNICHE STATISTICHE SONO NECESSARIE?" Doctoral thesis, Università Cattolica del Sacro Cuore, 2018. http://hdl.handle.net/10280/39103.
Full textThe general aim of this research work is to enrich the literature on emerging adults’ financial well-being with research methodologies and statistical techniques never previously applied in this research field. Specifically, the first chapter of this thesis concerns the scoping methodology, a knowledge synthesis methodology that I adopted to identify the emerging adults’ financial well-being definition, components, predictors and outcomes. The second chapter consists in the application of a new statistical technique, Latent Transition Analysis, that I used to identify subgroups of emerging adults homogeneous in their configuration of adult social markers already reached and to investigate the relation between these emerging adults’ subgroups and their financial well-being. The third chapter describes a three-step methodology to develop and validate new measurement instruments, based on the contemporary view of validity proposed in the last fifty years. This three-step procedure was here applied to develop and validate a new instrument measuring subjective financial well-being for an emerging adult target population. Finally, the fourth chapter concerns the multiple informant methodology that I applied to collect information about family financial socialization and its impact on the child’s financial well-being from mother, father and the emerging adult child.