930 resultados para orthogonal Gram polynomials


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Se plantea el problema que tienen los libros de texto de Ense??anza de Espa??ol como Lengua Extranjera, al relegar los texto literarios en espa??ol a las ??ltimas p??ginas y no presentar m??s variedad. Se centra en un texto literario concreto, Do??a Gram??tica, Se propone una secuencia de actividades para rentabilizar did??cticamente la pieza Do??a Gram??tica. Si bien algunas de ellas pueden ser adaptadas a otras obras teatrales, lo que se pretende fundamentalmente es que el profesor tenga una gu??a de cu??les son las l??neas en las que puede trabajar esta obra. Es un texto que puede explotarse m??s all?? de rentabilizar el paso del estilo directo al estilo indirecto y de una lectura dramatizada.

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El proceso de las purificaciones, que hab??a comenzado en 1810 y 1814, qued?? institucionalizado en 1823 por la Junta de Oy??rzun y la Regencia de Madrid. Despu??s de una moment??nea suspensi??n, a la vuelta de Fernando VII al poder, se dictan en 1824 normas sobre las purificaciones, encarg??ndose Calomarde de las de los intelectuales y profesores y Aymerich de los militares. Seg??n los Peset: ??Las purificaciones suponen una revisi??n ???especialmente dirigida a empleados p??blicos??? persona a persona. No contra sospechosos o presuntos delincuentes, como en las causas formadas por leyes penales, sino contra toda una amplia clase de personas. No es tampoco declaraci??n del cese de personas determinadas, sino pasar toda la administraci??n por el tamiz de un procedimiento??.

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We describe the use of bivariate 3d empirical orthogonal functions (EOFs) in characterising low frequency variability of the Atlantic thermohaline circulation (THC) in the Hadley Centre global climate model, HadCM3. We find that the leading two modes are well correlated with an index of the meridional overturning circulation (MOC) on decadal timescales, with the leading mode alone accounting for 54% of the decadal variance. Episodes of coherent oscillations in the sub-space of the leading EOFs are identified; these episodes are of great interest for the predictability of the THC, and could indicate the existence of different regimes of natural variability. The mechanism identified for the multi-decadal variability is an internal ocean mode, dominated by changes in convection in the Nordic Seas, which lead the changes in the MOC by a few years. Variations in salinity transports from the Arctic and from the North Atlantic are the main feedbacks which control the oscillation. This mode has a weak feedback onto the atmosphere and hence a surface climatic influence. Interestingly, some of these climate impacts lead the changes in the overturning. There are also similarities to observed multi-decadal climate variability.

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A new spectral-based approach is presented to find orthogonal patterns from gridded weather/climate data. The method is based on optimizing the interpolation error variance. The optimally interpolated patterns (OIP) are then given by the eigenvectors of the interpolation error covariance matrix, obtained using the cross-spectral matrix. The formulation of the approach is presented, and the application to low-dimension stochastic toy models and to various reanalyses datasets is performed. In particular, it is found that the lowest-frequency patterns correspond to largest eigenvalues, that is, variances, of the interpolation error matrix. The approach has been applied to the Northern Hemispheric (NH) and tropical sea level pressure (SLP) and to the Indian Ocean sea surface temperature (SST). Two main OIP patterns are found for the NH SLP representing respectively the North Atlantic Oscillation and the North Pacific pattern. The leading tropical SLP OIP represents the Southern Oscillation. For the Indian Ocean SST, the leading OIP pattern shows a tripole-like structure having one sign over the eastern and north- and southwestern parts and an opposite sign in the remaining parts of the basin. The pattern is also found to have a high lagged correlation with the Niño-3 index with 6-months lag.