Academic literature on the topic 'Inferenza cauta'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Inferenza cauta.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Inferenza cauta"

1

Rodríguez-Villamizar, Laura Andrea. "Inferencia causal en epidemiología." Revista de Salud Pública 19, no. 3 (May 1, 2017): 409–15. http://dx.doi.org/10.15446/rsap.v19n3.66180.

Full text
Abstract:
En este ensayo, que corresponde a la segunda sesión del Seminario interuniversidades de programas de salud pública del I semestre de 2017, se revisó inicialmente de manera breve el desarrollo histórico de la definición de causa para comprender el desarrollo del pensamiento y de los modelos de causalidad. Posteriormente, se presentaron los fundamentos teóricos que sustentan la identificación de relaciones causales y los modelos y métodos de análisis disponibles. Finalmente, se presentaron algunas conclusiones respecto a las fortalezas y limitaciones que ofrece el análisis contrafactual en la identificación de relaciones causales en epidemiología social.
APA, Harvard, Vancouver, ISO, and other styles
2

Salvini, Alessandro, and Antonio Iudici. "Le attribuzioni di causa e il giudizio clinico in psichiatria forense e psicologia giuridica." RIVISTA SPERIMENTALE DI FRENIATRIA, no. 2 (July 2011): 69–81. http://dx.doi.org/10.3280/rsf2011-002006.

Full text
Abstract:
Il presente studio si č occupato di quei procedimenti conoscitivi in base ai quali gli psicologi e gli psichiatri effettuano le valutazioni psicodiagnostiche nell'ambito delle consulenze tecniche e delle perizie. Tali processi sono stati tradizionalmente trascurati dall'ambito clinico-forense privando i professionisti del settore di un utile confronto interdisciplinare e rendendo di dubbia validitŕ tecnicoscientifica alcune modalitŕ di indagine psicodiagnostica. Nello specifico si č voluto mettere in evidenza gli errori in cui lo specialista forense puň incorrere quando risponde agli interrogativi posti dalla committenza giuridica, sia sotto il profilo degli errori di attribuzione e delle inferenze, sia nell'ambito delle incongruenze epistemologiche.
APA, Harvard, Vancouver, ISO, and other styles
3

Gamboa, Lydia Deni. "La teoría de Adam of Wodeham sobre la percepción no verídica de círculos suspendidos en el aire." Perseitas 8 (July 10, 2020): 295. http://dx.doi.org/10.21501/23461780.3669.

Full text
Abstract:
Cuando vemos una vara moviéndose en círculos, aparece un círculo en el aire desde la perspectiva de la primera persona. Esta ilusión fue explicada por Peter Auriole mediante la idea según la cual, en tal caso, existe una entidad aparente en nuestra visión, la cual es la causa directa de tal ilusión. Wodeham presenta una explicación diferente pero similar a la de Ockham. Para él, cuando un agente cree que existe un círculo suspendido, él mismo forma una inferencia cuya conclusión es "existe un círculo suspendido en el aire". Esta inferencia es casi imperceptible para nosotros, según Wodeham. En este artículo reconstruyo la explicación que ofrece Wodeham del proceso por el cual un agente cree que "existe un círculo suspendido en el aire". Este proceso es diferente a lo propuesto por Ockham.
APA, Harvard, Vancouver, ISO, and other styles
4

Ocampo-Duque, William, Carolina Osorio, Christian Piamba, Marta Schuhmacher, and José L. Domingo. "Water quality analysis in rivers with non-parametric probability distributions and fuzzy inference systems: Application to the Cauca River, Colombia." Environment International 52 (February 2013): 17–28. http://dx.doi.org/10.1016/j.envint.2012.11.007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Matute Clavier, Arnaldo, and William Fernando Bernal Suárez. "Técnicas de lógica difusa en ingeniería de control." Revista Ciencia, Innovación y Tecnología 3 (November 27, 2017): 125–34. http://dx.doi.org/10.38017/2390058x.81.

Full text
Abstract:
Se entiende por lógica difusa la forma de representar matemáticamente, razonamientos e ideas imprecisas o aproximadas. Se basa en relaciones de entrada-salida representadas en un compendio de reglas difusas, que son expresiones lingüísticas que asocian una causa con un efecto. Su versatilidad la ha hecho apta para la solución de problemas de seguimiento de referencia en ingeniería de control, donde ha mejorado el desempeño de controladores para sistemas no necesariamente lineales e invariantes en el tiempo. En su teoría, se estudian distintos esquemas de control en los cuales la lógica difusa desempeña un papel determinante en su condición de control adaptivo. También, la capacidad que tienen los sistemas de inferencia difusa (SID) para la identificación de sistemas dinámicos, aporta soluciones a esquemas de control que contemplan modelos de referencia. Así, las técnicas de lógica difusa en ingeniería de control han sido un alternativa exitosa en los esfuerzos dirigidos a mejorar el rendimiento de sistemas de control ante no linealidades, variabilidad de parámetros y situaciones en las cuales la información del proceso a controlar es impreciso o poco conocido.
APA, Harvard, Vancouver, ISO, and other styles
6

Franco Silva, Talita Cristina Marques, and João Fernando Marcolan. "Preconceito aos indivíduos com transtorno mental como agravo do sofrimento." Revista de Enfermagem UFPE on line 12, no. 8 (August 4, 2018): 2089. http://dx.doi.org/10.5205/1981-8963-v12i8a234776p2089-2098-2018.

Full text
Abstract:
RESUMOObjetivo: analisar a percepção dos indivíduos com transtornos mentais sobre o preconceito, fatores, sofrimento psíquico gerado e o enfrentamento. Método: estudo qualitativo, exploratório e descritivo. Foram entrevistados, com a aplicação de questionário semiestruturado, 21 participantes atendidos em uma Unidade Básica de Saúde. O processamento e a análise de dados se deram a partir da pré-análise, exploração do material, tratamento dos resultados, inferência e interpretação. Resultados: o preconceito e o estigma vieram dos diversos atores e contextos sociais, sendo que o advindo do meio familiar causou maior sofrimento ou agravo ao quadro instalado. Conclusão: os participantes relataram o sofrimento causado pelo preconceito. A falta de conhecimento sobre o transtorno mental foi a principal causa do preconceito e o enfrentamento ocorreu por meio de isolamento social, atividades laborais ou cotidianas. Este estudo traz à luz dados acerca da temática do preconceito e sofrimento mental e contribui para formular mudanças na formação e na prática dos profissionais envolvidos no atendimento com a finalidade de diminuição do preconceito, do estigma e do sofrimento psíquico. Descritores: Transtornos Mentais; Preconceito; Estigma Social; Saúde Mental; Saúde Coletiva; Enfermagem.ABSTRACT Objective: to analyze the perception of the individuals with mental disorders on the prejudice, factors, psychic suffering generated and the confrontation. Method: qualitative, exploratory and descriptive study. A total of 21 participants were interviewed using a semi-structured questionnaire. Data processing and analysis were based on pre-analysis, material exploration, treatment of results, inference and interpretation. Results: prejudice and stigma came from the various actors and social contexts, and the coming from the family environment caused greater suffering or aggravation to the installed picture. Conclusion: participants reported the suffering caused by prejudice. Lack of knowledge about mental disorder was the main cause of prejudice and confrontation occurred through social isolation, work or daily activities. This study brings to light data on the subject of prejudice and mental suffering and contributes to formulate changes in the training and practice of the professionals involved in care for the purpose of reducing prejudice, stigma and psychological distress. Descriptors: Mental Disorders; Preconception; Social Stigma; Mental health; Collective Health; Nursing. RESUMEN Objetivo: analizar la percepción de los individuos con trastornos mentales sobre el perjuicio, factores, sufrimiento psíquico generado y el enfrentamiento. Método: estudio cualitativo, exploratorio y descriptivo. Se entrevistaron, con la aplicación de cuestionario semiestructurado, 21 participantes atendidos en una Unidad Básica de Salud. El procesamiento y el análisis de datos se dieron a partir del pre-análisis, explotación del material, tratamiento de los resultados, inferencia e interpretación. Resultados: el Perjuicio y el estigma vinieron de los diversos actores y contextos sociales, siendo que el proveniente del medio familiar causó mayor sufrimiento o agravo al cuadro instalado. Conclusión: los participantes relataron el sufrimiento causado por el prejuicio. La falta de conocimiento sobre el trastorno mental fue la principal causa del prejuicio y el enfrentamiento ocurrió por medio de aislamiento social, actividades laborales o cotidianas. Este estudio trae a la luz datos sobre la temática del prejuicio y sufrimiento mental y contribuye a formular cambios en la formación y en la práctica de los profesionales involucrados en la atención con la finalidad de disminución del prejuicio, del estigma y del sufrimiento psíquico. Descritores: Trastornos Mentales; Prejuicio; Estigma Social; Salud Mental; Salud Colectiva; Enfermeria.
APA, Harvard, Vancouver, ISO, and other styles
7

Picón, Mariantonella. "La causalidad de la psicopatía: rasgos y características." Revista de Investigación Científica y Tecnológica 5, no. 1 (June 30, 2021): 84–89. http://dx.doi.org/10.36003/rev.investig.cient.tecnol.v5n1(2021)7.

Full text
Abstract:
Los psicópatas se caracterizan por la insensibilidad, la capacidad limitada de remordimiento y la falta de empatía. La causa exacta de estos rasgos de desorden de la personalidad es un área de continuo análisis y debate científico. La psicopatía ha sido considerada como como la capacidad limitada de inferencia acerca de los estados mentales de otros o la capacidad manipuladora y de desarrollar habilidades de deducción sobre otras personas. En este artículo de revisión se determinarán los principales rasgos y características del psicópata, así como las teorías sobre los factores de desarrollo de la psicopatía según las posturas de tres autores precisando las principales anomalías de la mente psicopática. La psicopatía como trastorno de la personalidad continúa siendo un tema difícil de estudio que no solo implica comprender los patrones cerebrales correspondientes específicos, sino también la comprensión de las expresiones faciales y las emociones genéricas. Se concluye que se puede identificar al psicópata cuando se encuentra bajo múltiples equipos de pruebas cerebrales, pero sin estos recursos, un psicópata podría ser cualquier persona. No hay certeza sobre las causas de la psicopatía, pero es probable que sea una combinación de factores genéticos, ambientales e interpersonales.
APA, Harvard, Vancouver, ISO, and other styles
8

Quirama, Uvenny, Paula Forero, Diego Montañez, Diana Mena, and Henner Solarte. "Resolviendo endogeneidad sin instrumentos. Una aplicación desde Lewbel." Unaciencia Revista de Estudios e Investigaciones 13, no. 24 (July 15, 2020): 71–83. http://dx.doi.org/10.35997/runacv13n24a9.

Full text
Abstract:
Hasta el día de hoy, se ha venido presentando una motivación académica importante por comprender las relaciones causales para hacer inferencia estadística robusta. No obstante, es muy común enfrentarse a problemas de endogeneidad y en la práctica encontrar instrumentos suele ser complejo. Aunque la endogeneidad puede deberse a diferentes mecanismos de interacción y relaciones entre los regresores y las variables respuesta con el error, el efecto que causa es la inconsistencia en la estimación, lo que significa que los resultados no están respondiendo de forma adecuada a resolver el problema propuesto. Parte de allí entonces, la motivación de investigaciones y metodologías que buscan corregir la endogeneidad sin recurrir al uso de instrumentos externos. En este documento de trabajo, se parte por considerar que la inconsistencia se debe a un error de medida en la variable endógena, y se exploran mecanismos de solución para corregir el sesgo. Dada la naturaleza de los datos la metodología elegida es la propuesta por Lewbel (1997). Finalmente, se realiza una aplicación a un ejercicio empírico empleando las bases de datos provistas por Stock and Watson (2007), concluyendo con la solución a los problemas de endogeneidad y la diferencia existente entre la solución encontrada en la investigación y otros estudios econométricos.
APA, Harvard, Vancouver, ISO, and other styles
9

Elleuch, Hanene, and Ali Wali. "UNWEARABLE MULTI-MODAL GESTURES RECOGNITION SYSTEM FOR INTERACTION WITH MOBILE DEVICES IN UNEXPECTED SITUATIONS." IIUM Engineering Journal 20, no. 2 (December 2, 2019): 142–62. http://dx.doi.org/10.31436/iiumej.v20i2.1000.

Full text
Abstract:
In this paper, a novel real-time system to control mobile devices, in unexpected situations like driving, cooking and practicing sports, based on eyes and hand gestures is proposed. The originality of the proposed system is that it uses a real-time video streaming captured by the front-facing camera of the device. To this end, three principal modules are charged to recognize eyes gestures, hand gestures and the fusion of these motions. Four contributions are presented in this paper. First, the proposition of the fuzzy inference system in the purpose of determination of eyes gestures. Second, a new database has been collected that is used in the classification of open and closed hand gesture. Third, two descriptors have been combined to have boosted classifiers that can detect hands gestures based on Adaboost detector. Fourth, the eyes and hand gestures are erged to command the mobile devices based on the decision tree classifier. Different experiments were assessed to show that the proposed system is efficient and competitive with other existing systems by achieving a recall of 76.53%, 98 % and 99% for eyes gesture recognition, detection of fist gesture, detection of palm gesture respectively and a success rate of 88% for eyes and hands gestures correlation. ABSTRAK: Kajian ini mencadangkan satu sistem masa nyata bagi mengawal peranti mudah alih, dalam keadaan tak terjangka seperti sedang memandu, memasak dan bersukan, berdasarkan gerakan mata dan tangan. Kelainan sistem yang dicadangkan ini adalah ia menggunakan masa nyata video yang diambil daripada peranti kamera hadapan. Oleh itu, tiga modul utama ini telah ditugaskan bagi mengenal pasti isyarat mata, tangan dan gabungan kedua-dua gerakan. Empat sumbangan telah dibentangkan dalam kajian ini. Anggaran pertama bahawa isyarat gerak mata mempengaruhi sistem secara kabur. Kedua, pangkalan data baru telah dikumpulkan bagi pengelasan isyarat tangan terbuka dan tertutup. Ketiga, dua pemerihal data telah digabungkan bagi merangsangkan pengelasan yang dapat mengesan isyarat tangan berdasarkan pengesan Adaboost. Keempat, gerakan mata dan tangan telah digunakan bagi mengarah peranti mudah alih berdasarkan pengelasan carta keputusan. Eksperimen berbeza telah dijalankan bagi membuktikan bahawa sistem yang dicadang adalah berkesan dan berdaya saing dengan sistem sedia ada. Keputusan menunjukkan 76.53%, 98% dan 99% masing-masing telah dikesan pada pengesanan gerak isyarat mata, genggaman tangan dan tapak tangan, dengan kadar 88% berjaya mengesan gerak isyarat mata dan tangan.
APA, Harvard, Vancouver, ISO, and other styles
10

Hiken, Jeffrey, Richard LeDuc, Petra Gilmore, Henry Rohrs, R. Reid Townsend, and Monica Bessler. "Global Differences in RBC Membrane Protein Expression Between Normal and PNH Individuals." Blood 114, no. 22 (November 20, 2009): 1986. http://dx.doi.org/10.1182/blood.v114.22.1986.1986.

Full text
Abstract:
Abstract Abstract 1986 Poster Board I-1008 Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired hemolytic anemia that results from the deficiency of glycosyl phosphatidylinositol (GPI)-linked proteins on the surface of blood cells carrying a PIGA gene mutation. The absence of 2 GPI-linked complement regulatory proteins, CD59 and CD55, on PNH red blood cells (RBCs) accounts for their increased susceptibility to complement-mediated lysis. The pathophysiology of other PNH complications, including thrombophilia and the association with aplastic anemia, is less well understood. We hypothesized that the differences between PNH and normal RBCs are not restricted to the lack of GPI-linked proteins. To test this hypothesis we have developed a label-free proteomics platform to identify global differences in RBC membrane protein expression between normal and PNH individuals. Six control samples and 17 PNH samples from 13 different patients were analyzed. PNH patients were categorized as high (>80%), medium (between 20% and 80%), and low (<20%), based on their combined percentage of type II and type III PNH RBCs. RBC membranes were prepared, and proteins were extracted and subjected to trypsin digest. Peptides were then analysed by nano-liquid chromatography coupled to tandem mass spectrometry (nanoLC-MS/MS). All 23 nanoLC-MS/MS runs (6 control and 17 PNH) were aligned, and peptide ion currents were extracted and normalized for relative quantitation of peptide abundances and inference of relative protein abundance. ANOVA analyses of the different sample classes were performed in order to distinguish differences in the relative abundances at the peptide level (from a dataset containing ∼30,000 peptides). Comparison of control vs. high PNH samples yielded a set of 142 peptides showing patterns of expression that clearly separated the two groups. Targeted nanoLC-MS/MS identified the differential expression of peptides from 5 of the 8 known GPI-linked proteins expressed on human RBCs. As expected, the relative abundances of these peptides were inversely related to the percentage of PNH RBCs in the samples. In addition, we found peptides from complement protein C3 increased on PNH RBCs from patients receiving the complement C5 inhibitor eculizumab. We have developed a statistical model that uses peptide ion intensities to infer relative abundance at the protein level, and allows for significance testing between healthy and disease groups. RBC membranes from the 6 normal control and 7 high PNH samples were processed using MS with ‘data-dependant acquisition', which is biased towards annotation of the more abundant peptides. 1676 peptides from 119 proteins were annotated with high confidence. Nine of these showed a significant difference between control and PNH, including CD59 and semaphorin-7A, the 2 known GPI-linked proteins annotated in this experiment. The remaining 7 non-GPI-linked proteins were peroxiredoxin-2 (PXDN2), valosin-containing protein, gamma-actin, catalase (CATA), heat shock protein 90A, flotilin-1, and RAP1A. Several of these non-GPI-linked proteins are of potential interest to the PNH phenotype or PNH pathophysiology. The anti-oxidative enzymes CATA and PXDN2 both showed significantly lower levels associated with PNH RBC membranes compared to control, and may contribute to an increased susceptibility of the PNH RBC plasma membrane to oxidative damage. The small G-protein RAP1A showed a significantly elevated expression in PNH RBC membrane preparations. RAP1A activation mediates increased sickle cell RBC adhesion to laminin (Blood, 105: 3322), suggesting that elevated RAP1A levels may also contribute to the increased propensity of thrombosis in PNH patients. In summary, differential protein expression analysis indicates that PNH and normal RBCs differ by more than only the lack of GPI-linked proteins. Differences in protein expression are likely to contribute to disease manifestations and are likely to provide insights into additional unexpected underlying disease processes. Future studies will investigate longitudinal changes in the RBC proteome during the course of the disease and in response to treatment, potentially providing new biomarkers that help to distinguish patients at risk for complications and patients likely to benefit from specific forms of treatment. Our comparative label-free proteomics platform should be broadly applicable to the analysis of other RBC disorders. Disclosures: Bessler: Alexion Pharaceuticals Inc: Membership on an entity's Board of Directors or advisory committees.
APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Inferenza cauta"

1

CAMPAGNER, ANDREA. "Robust Learning Methods for Imprecise Data and Cautious Inference." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2023. https://hdl.handle.net/10281/404829.

Full text
Abstract:
La rappresentazione, quantificazione e gestione dell'incertezza è uno dei problemi centrali nell'Intelligenza Artificiale, ed in particolare nel Machine Learning, in cui l'incertezza è intrinsecamente collegata alla natura induttiva dell'apprendimento. Tra diverse forme d'incertezza, la modellazione dell'imprecisione, cioè il problem di gestire dati o conoscenza imperfetta o incompleta, ha recentemente attratto molto interesse nella comunità di ricerca, per via delle sue implicazione teoriche e applicate sull'uso di strumenti basati sul Machine Learning. Questo lavoro si concentra sul problema di gestire l'imprecision nel Machine Learning, sotto due diverse prospettive. Da un lato, l'imprecisione che riguarda i dati di input alla pipeline di Machine Learning, da cui si origina il problema dell'apprendimento da dati imprecisi. Dall'altro, l'imprecisione come strumento per implementare processi di quantificazione dell'incertezza nel Machine Learning, al fine di permettere a questi ultimi di fornire previsioni set-valued e portare quindi alla definizione di metodi di inferenza cauta. Lo scopo di questo lavoro, quindi, riguarda lo studio teorico ed empirico dei due scenari summenzionati. Per quanto riguarda il problema dell'apprendimento da dati imprecisi, il focus principale riguarda l'investigazione del problema dell'apprendimento da fuzzy label, sia da un punto di visto teorico che algoritmo. I contributi principali includono: la proposta di una caratterizzazione teorica del problema; la proposta di un nuovo algoritmo di ensemble, basato su pseudo-label, e il suo studio dal punto di visto teorico ed empirico; l'applicazione del summenzionato algoritmo in tre problemi medici reali; ed infine la proposta e lo studio di algoritmi di feature selection per ridurre la complessità computazionale e limitare la "curse of dimensionality" per algoritmi di apprendimento da fuzzy label. Per quanto riguarda l'inferenza cauta, il focus principale riguarda lo studio teorico di tre framework per l'inferenza cauta e lo sviluppo di nuovi algoritmi ed approcci per estendere l'applicabilità di tali framework in setting complessi. I contributi principali in questo senso riguardo lo studio delle proprietà teoriche di, e le relazioni tra, metodi di inferenza cauta decision-teorici, basati sulla selective prediction e sulla conformal prediction; lo studio di modelli ensemble di inferenza cauta, sia da un punto di vista empirico che teorico, mostrando in particolare che tali ensemble permettono di migliorare la robustezza e la generalizzazione di algoritmi di Machine Learning, nonché di facilitare l'applicazione di metodi d'inferenza cauta a dati complessi, multi-sorgenti o multi-modali
The representation, quantification and proper management of uncertainty is one of the central problems in Artificial Intelligence, and particularly so in Machine Learning, in which uncertainty is intrinsically tied to the inductive nature of the learning problem. Among different forms of uncertainty, the modeling of imprecision, that is the problem of dealing with data or knowledge that are imperfect} and incomplete, has recently attracted interest in the research community, for its theoretical and application-oriented implications on the practice and use of Machine Learning-based tools and methods. This work focuses on the problem of dealing with imprecision in Machine Learning, from two different perspectives. On the one hand, when imprecision affects the input data to a Machine Learning pipeline, leading to the problem of learning from imprecise data. On the other hand, when imprecision is used a way to implement uncertainty quantification for Machine Learning methods, by allowing these latter to provide set-valued predictions, leading to so-called cautious inference methods. The aim of this work, then, will be to investigate theoretical as well as empirical issues related to the two above mentioned settings. Within the context of learning from imprecise data, focus will be given on the investigation of the learning from fuzzy labels setting, both from a learning-theoretical and algorithmic point of view. Main contributions in this sense include: a learning-theoretical characterization of the hardness of learning from fuzzy labels problem; the proposal of a novel, pseudo labels-based, ensemble learning algorithm along with its theoretical study and empirical analysis, by which it is shown to provide promising results in comparison with the state-of-the-art; the application of this latter algorithm in three relevant real-world medical problems, in which imprecision occurs, respectively, due to the presence of conflicting expert opinions, the use of vague technical vocabulary, and the presence of individual variability in biochemical parameters; as well as the proposal of feature selection algorithms that may help in reducing the computational complexity of this task or limit the curse of dimensionality. Within the context of cautious inference, focus will be given to the theoretical study of three popular cautious inference frameworks, as well as to the development of novel algorithms and approaches to further the application of cautious inference in relevant settings. Main contributions in this sense include the study of the theoretical properties of, and relationships among, decision-theoretic, selective prediction and conformal prediction methods; the proposal of novel cautious inference techniques drawing from the interaction between decision-theoretic and conformal predictions methods, and their evaluation in medical settings; as well as the study of ensemble of cautious inference models, both from an empirical point of view, as well as from a theoretical one, by which it is shown that such ensembles could be useful to improve robustness, generalization, as well as to facilitate application of cautious inference methods on multi-source and multi-modal data.
APA, Harvard, Vancouver, ISO, and other styles
2

Tasca, Gustavo Henrique 1990. "Inferência bayesiana para distribuições de cauda longa." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307583.

Full text
Abstract:
Orientador: Laura Leticia Ramos Rifo
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matemática Estatística e Computação Científica
Made available in DSpace on 2018-08-26T15:05:12Z (GMT). No. of bitstreams: 1 Tasca_GustavoHenrique_M.pdf: 979052 bytes, checksum: bb1371bb1b8626882cebcf01550bb823 (MD5) Previous issue date: 2015
Resumo: Neste trabalho, estudamos métodos de inferência bayesiana para distribuições de cauda longa, que não envolvam o cálculo da função de verossimilhança. Inicialmente, apresentamos uma análise das propriedades de distribuições de cauda pesada e seus casos particulares, como as famílias de distribuições de cauda longa, subexponenciais e de variação regular. Apresentamos algumas estatísticas e seus comportamentos amostrais, a fim de desenvolvermos medidas de diagnóstico. Para obtenção de inferências a posteriori, discutimos o método ABC de mínima entropia e outros algoritmos para verificação e seleção de modelos, que não utilizam o cálculo da função de verossimilhança. Introduzimos um novo algoritmo para seleção de modelos baseado na distribuição preditiva a posteriori, cujos resultados são validados através de simulações e análises de dados reais relacionados à hidrologia
Abstract: In this work, we study Bayesian inference methods for long-tailed distributions that don't involve the evaluation of the likelihood function. Initially, we present an analysis of the properties of heavy-tailed distributions and particular cases, as long-tailed, subexponencial and regular variation families. Some statistics are presented and their sampling behavior studied, in order to develop diagnostic measures. For obtaining posterior inferences, we discuss the minimum entropy ABC and others likelihood-free algorithms, aiming model checking and model selection. We introduce a new model selection algorithm based on the posterior predictive distribution, the results of which are validated through simulations and real data related to river flow
Mestrado
Estatistica
Mestre em Estatística
APA, Harvard, Vancouver, ISO, and other styles
3

Santos, Junior James Dean Oliveira dos. "Considerações sobre a relação entre distribuições de cauda pesada e conflitos de informação em inferencia bayesiana." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306673.

Full text
Abstract:
Orientadores: Veronica Andrea Gonzales-Lopez, Laura Leticia Ramos Rifo
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica
Made available in DSpace on 2018-08-08T04:30:52Z (GMT). No. of bitstreams: 1 SantosJunior_JamesDeanOliveirados_M.pdf: 1844173 bytes, checksum: 122644f8bc0dedaaa7d7633d9b25eb9c (MD5) Previous issue date: 2006
Resumo: Em inferência bayesiana lidamos com informações provenientes dos dados e com informações a priori. Eventualmente, um ou mais outliers podem causar um conflito entre as fontes de informação. Basica!llente, resolver um conflito entre as fontes de informações implica em encontrar um conjunto de restrições tais que uma das fontes domine, em certo sentido, as demais. Têm-se utilizado na literatura distribuições amplamente aceitas como sendo de cauda pesada para este fim. Neste trabalho, mostramos as relações existentes entre alguns resultados da teoria de conflitos e as distribuições de caudas pesadas. Também mostramos como podemos resolver conflitos no caso locação utilizando modelos subexponenciais e como utilizar a medida credence para resolver problemas no caso escala
Abstract: In bayesian inference we deal with information proceeding from the data and prior information. Eventually, one ar more outliers can cause a conflict between the sources information. Basically, to decide a conflict between the sources of information implies in finding a set of restrictions such that one of the sources dominates, in certain sense, the outher. Widely distributions have been used in literature as being of heavy tailed for this end. In this work, we show the relations between some results of the theory of conflicts and the heavy tailed distributions. Also we show how we can decide a conflicts in the location case using subexponential models and how to use the measure credence to decide problems in the scale case
Mestrado
Inferencia Bayesiana
Mestre em Estatística
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography