Search results for "inversion"
showing 10 items of 312 documents
Crustal Structure of the Seismogenic Volume of the 2010–2014 Pollino (Italy) Seismic Sequence From 3D P- and S-Wave Tomographic Images
2021
A tomographic analysis of Mt. Pollino area (Italy) has been performed using earthquakes recorded in the area during an intense seismic sequence that occurred between 2010 and 2014. 870 local earthquakes with magnitude ranging from 1.8 to 5.0 were selected considering the number of recording stations, the signal quality, and the hypocenter distribution. P- and S-wave arrival times were manually picked and used to compute 3D velocity models through tomographic seismic inversion. The resulting 3D distributions of VP and VS are characterized by high resolution in the central part of the investigated area and from surface to about 10 km below sea level. The aim of the work is to obtain high-qual…
Faults role in geological processes. Repeated changing of activity mode and magnitude fron basin formation to mountain belt staking: the case of the …
2010
Le violazioni inerenti agli obblighi di documentazione, di registrazione e di individuazione di determinati prodotti, alle operazioni non imponibili …
2011
Commento delle norme sanzionatorie relative alle violazioni inerenti agli obblighi di emissione di documenti fiscali in materia di imposta sul valore aggiunto, compresi quelli relativi al regime monofase nel settore delle telecomunicazioni e quelli riferibili alla documentazione nel regime dell'inversione contabile
Denjoy and P-path integrals on compact groups in an inversion formula for multiplicative transforms
2009
Abstract Denjoy and P-path Kurzweil-Henstock type integrals are defined on compact subsets of some locally compact zero-dimensional abelian groups. Those integrals are applied to obtain an inversion formula for the multiplicative integral transform.
The Peculiarities of Gonad Transformation in Teleosts
1983
In teleosts the problem of sex determination and sex differentiation is more puzzling than in other vertebrates. It is not known whether the intriguing variety in the conditions of sex results from the position of these fishes within the vertebrate pedigree. They represent the final products of actinopterygian evolution toward the end of the age of reptiles, that is late in the Jurassic era. However, with that evolutionary fact in mind it is more plausible that teleosts deviate in many ways from the pattern that we are used to attribute to vertebrates in general. The following features of sex differentiation are striking examples of teleost peculiarity: (1) In both sexes there is no morphol…
Libre circulación de inversiones en la Unión Europea en tiempos de COVID-19
2020
Las inversiones extranjeras han fluido como nunca durante las últimas décadas, en el marco de una aceptación generalizada de sus beneficios. Esta situación, sin embargo, comienza a alterarse de forma acelerada en múltiples lugares del planeta. La presencia de un entorno geoestratégico más complejo y la aproximación crítica de muchos Estados hacia la globalización y lo que ella significa, está consolidando una visión más cautelosa hacia la libre circulación de inversiones extranjeras que, entre otros efectos, se plasma en la elaboración de normativas más restrictivas. La Unión Europea es un espacio económicamente integrado, muy abierto a las inversiones extranjeras y dotado además, de una po…
Deep Gaussian processes for biogeophysical parameter retrieval and model inversion
2020
Parameter retrieval and model inversion are key problems in remote sensing and Earth observation. Currently, different approximations exist: a direct, yet costly, inversion of radiative transfer models (RTMs); the statistical inversion with in situ data that often results in problems with extrapolation outside the study area; and the most widely adopted hybrid modeling by which statistical models, mostly nonlinear and non-parametric machine learning algorithms, are applied to invert RTM simulations. We will focus on the latter. Among the different existing algorithms, in the last decade kernel based methods, and Gaussian Processes (GPs) in particular, have provided useful and informative so…
Población y capital humano en España
2010
Se analiza las inversiones educativas en España desde una perspectiva histórica, haciendo referencia también a una comparación intenacional que permite resaltar algunos de los problemas que padece el sistema de enseñanza español respecto a los de las principales economías de su entorno. Después de describir el nivel de formación formal de la población adulta y de la población activa, se analiza los cambios que se han producido a largo plazo en la demanda de educación, haciendo una lectura comparada de los hechos a través de la organización del sistema educativo.
Block-Based Inversion of the Heat Equations
2014
This chapter presents robust methods, which refine the algorithms, in Sect. 7.2, for inversion of the heat equations. The idea behind the algorithms is to solve the inversion problem separately in different frequency bands. This is achieved by using spline wavelet packets. The solutions that minimize some parameterized quadratic functionals, are derived as linear combinations of the wavelet packets. Choice of parameters, which is performed automatically, determines the trade-off between the solution regularity and the initial data approximation. The Spline Harmonic Analysis (SHA) technique provides a unified computational scheme for the fast implementation of the algorithm and an explicit r…
Inversion of matrix pencils for generalized systems
1993
Abstract This paper clarifies the nature of the Leverrier-Faddeev algorithm for generalized and state-space systems. It presents useful diagrams for recursive computation of the coefficients of the characteristic polynomial and the coefficient matrices of the adjoint matrix for various matrix pencils. A simplified case covers recursive equations and diagrams for inversion of the second-order matrix pencil (Es2 + A1s + A0) where E may be singular. The appendix provides two examples of mechanical and heat exchange systems which can be described by the generalized models.