958 resultados para INDEPENDENCE
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hindi
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HINDI
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HINDI
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Graphical techniques for modeling the dependencies of randomvariables have been explored in a variety of different areas includingstatistics, statistical physics, artificial intelligence, speech recognition, image processing, and genetics.Formalisms for manipulating these models have been developedrelatively independently in these research communities. In this paper weexplore hidden Markov models (HMMs) and related structures within the general framework of probabilistic independencenetworks (PINs). The paper contains a self-contained review of the basic principles of PINs.It is shown that the well-known forward-backward (F-B) and Viterbialgorithms for HMMs are special cases of more general inference algorithms forarbitrary PINs. Furthermore, the existence of inference and estimationalgorithms for more general graphical models provides a set of analysistools for HMM practitioners who wish to explore a richer class of HMMstructures.Examples of relatively complex models to handle sensorfusion and coarticulationin speech recognitionare introduced and treated within the graphical model framework toillustrate the advantages of the general approach.
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A condition needed for testing nested hypotheses from a Bayesian viewpoint is that the prior for the alternative model concentrates mass around the small, or null, model. For testing independence in contingency tables, the intrinsic priors satisfy this requirement. Further, the degree of concentration of the priors is controlled by a discrete parameter m, the training sample size, which plays an important role in the resulting answer regardless of the sample size. In this paper we study robustness of the tests of independence in contingency tables with respect to the intrinsic priors with different degree of concentration around the null, and compare with other “robust” results by Good and Crook. Consistency of the intrinsic Bayesian tests is established. We also discuss conditioning issues and sampling schemes, and argue that conditioning should be on either one margin or the table total, but not on both margins. Examples using real are simulated data are given
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Resumen tomado de la publicación. Resumen también en inglés
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Este artículo evalúa el vínculo entre la independencia del banco central y la inflación, para el caso de Colombia. Se desarrolla un marco teórica relacionada con la independencia del Banco Central y la inflación. La conclusión es que la independencia del Banco Central es una característica importante de cara a la reducción de la inflación y con el fin de resolver parcialmente el problema de la inconsistencia temporal, y asumiendo la existencia de un régimen monetario dominante la independencia del Banco Central ha llevado a una reducción de la inflación y de su variabilidad en Colombia. No obstante, los resultados de la inflación en el último periodo no han sido tan impresionantes. Este artículo sugiere explicaciones alternativas a este resultado. La independencia real del Banco Central colombiano puede ser más baja que su independencia formal. Adicionalmente, otros factores pueden contribuir a explicar una inflación más elevada que la esperada, particularmente la existencia de un déficit fiscal financiado con recursos externos.
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Material de apoyo para la enseñanza de la lectura en toda la primaria. Es una guía esencial para orientar al profesor en cómo usar los recursos principalmente para alumnos de seis a siete años. Hay orientaciones detalladas fotocopiables para el profesorado y hojas de trabajo para los alumnos para trabajar con cada uno de los textos de la serie Cambridge reading.
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Forma parte de una serie que estudia la historia del hombre negro y de sus logros en el contexto histórico mundial, para lo cual utiliza material gráfico y biografías. El contenido de este recurso comienza en la década de los años treinta y cuarenta del siglo XX y finaliza en 1968 con la independencia de Mauritania y Guinea Ecuatorial. En el transcurso de estos años, se produce la descolonización de África, aunque en Sudáfrica se inicia en 1948 la política del apartheid, y la independencia del Caribe y de América del Sur; los afroamericanos luchan por la igualdad de derechos y para poner fin a la discriminación racial y la segregación; surge el movimiento por los Derechos Civiles y las protestas pacíficas en Estados Unidos.
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In a recent investigation, Landsat TM and ETM+ data were used to simulate different resolutions of remotely-sensed images (from 30 to 1100 m) and to analyze the effect of resolution on a range of landscape metrics associated with spatial patterns of forest fragmentation in Chapare, Bolivia since the mid-1980s. Whereas most metrics were found to be highly dependent on pixel size, several fractal metrics (DLFD, MPFD, and AWMPFD) were apparently independent of image resolution, in contradiction with a sizeable body of literature indicating that fractal dimensions of natural objects depend strongly on image characteristics. The present re-analysis of the Chapare images, using two alternative algorithms routinely used for the evaluation of fractal dimensions, shows that the values of the box-counting and information fractal dimensions are systematically larger, sometimes by as much as 85%, than the "fractal" indices DLFD, MPFD, and AWMFD for the same images. In addition, the geometrical fractal features of the forest and non-forest patches in the Chapare region strongly depend on the resolution of images used in the analysis. The largest dependency on resolution occurs for the box-counting fractal dimension in the case of the non-forest patches in 1993, where the difference between the 30 and I 100 m-resolution images corresponds to 24% of the full theoretical range (1.0 to 2.0) of the mass fractal dimension. The observation that the indices DLFD, MPFD, and AWMPFD, unlike the classical fractal dimensions, appear relatively unaffected by resolution in the case of the Chapare images seems due essentially to the fact that these indices are based on a heuristic, "non-geometric" approach to fractals. Because of their lack of a foundation in fractal geometry, nothing guarantees that these indices will be resolution-independent in general. (C) 2006 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS). Published by Elsevier B.V. All rights reserved.