Добірка наукової літератури з теми "Modélisation inversion"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Modélisation inversion".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Статті в журналах з теми "Modélisation inversion":
Hélie, Thomas, and X. Rodet. "Modélisation physique d'instruments de musique en systèmes dynamiques et inversion." Journal Européen des Systèmes Automatisés 37, no. 10 (December 30, 2003): 1305–10. http://dx.doi.org/10.3166/jesa.37.1305-1310.
Saadi, Mohamed, Mohamed Moncef Turki, Abdeslam Rami, and Fouad Bellouti. "Modélisation des bassins sur relais de décrochement et témoignage d’une inversion de subsidence au cours du Santonien-Campanien en Tunisie centro-orientale." Boletín Geológico y Minero 127, no. 2-3 (September 30, 2016): 469–82. http://dx.doi.org/10.21701/bolgeomin.127.2-3.011.
Rodríguez, Ruben Dario Cruz, and Alexis Castillo Sauza. "Alternativa para minimizar el costo de la energía eléctrica en zonas francas de Colombia / Proposal to minimize the cost of electricity in commercial areas of Colombia." Revista EAN, no. 72 (August 1, 2013): 90. http://dx.doi.org/10.21158/01208160.n72.2012.570.
Дисертації з теми "Modélisation inversion":
Bonnefond, Xavier. "Contributions à la tomographie thermoacoustique : modélisation et inversion." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1155/.
ThermoAcoustic Tomography (TAT) is a medical imaging technique using the pressure wave generated by a body illuminated by an electromagnetic pulse. Since the acoustic signal is recorded around the body, the resulting inverse problem can be formulated as follows : from the knowledge of a solution of the wave equation on some hypersurface, reconstruct its initial condition. Despite several inversion formulas, so far no efficient procedure, taking partial data and damping into account, is known. As well as a state of the art, this work is dedicated to the introduction of a variational approach for the TAT problem. We studied the regularization by mollification, which consists in replacing the original object by a limited resolution version of it, and treating the data so that they fit this new objective. Moreover, we used a noise level estimation provided by the Golub-Kahan bidiagonalization process to allow an accurate regularization parameter selection. In the second part of this work, we investigate the usual TAT model and put forward some damped wave equation with a finite wave front speed. This improvement yields to the use of the Back and Forth Nudging (BFN) method, which was first implemented for data assimilation purposes, to invert the TAT problem. This technique provides a sequence of approximations of the solution by iterating forward and backward implementations of a wave equation including a newtonian recall to the data. This method, which is proved to be convergent in an ideal framework, leads to convincing results in both partial data and attenuated wave cases
Sladen, Anthony. "Modélisation non-linéaire des grands séismes de subduction." Paris 11, 2005. http://www.theses.fr/2005PA112098.
With the setting up of seismographic broad-band networks world wide in heighties, it has been possible to study the rupture process using information recorded in far-field. The inversion of seismograms to image the rupture, which is known for being highly non linear, is still commonly analysed using linearized methods. Based on this statement, we have developped an inversion method based on a stochastic algorithm called neighbourhood algorithm which has a certain number of avantages over other widely used algorithms. However, the need for a great number of variables for a kinematic inversion make it difficult to reach a good convergence. The alternative solution is to use a local exploration algorithm, the downhill simplex, in conjunction with the exploration phase. With a view to developping a simple and global method of inversion we use a simplified parametrization of the fault and the seismograms are generated from the ray theory. The methodology, aimed at pratical applications, is also a good way to evaluate the unicity of the problem and its resolution. We then set up a certain number of synthetic tests and used the well studied Antofagasta earthquake (30/07/1995) has a case study. Through this different examples we have concentrated on a certain number of essential points such as the resolution of P wave on the seismic moment, on the lateral and vertical distribution of the seismic rate and on the inversion of rupture velocity. We then invert for two major recent earthquakes : the Peruvian Aréquipa earthquake of the June 23rd, 2001 (Mw=8. 4) and of the Mexican Colima earthquake of January 22nd, 2003 (Mw=7. 6)
Dietrich, Michel. "Modélisation, traitements et inversion de profils de sismique marine." Brest, 1990. http://www.theses.fr/1990BRES2011.
Peyrat, Sophie. "Modélisation des tremblements de terre : rupture, rayonnement et inversion." Paris 11, 2001. http://www.theses.fr/2001PA112140.
Clarke, Richard William Barnes. "Modélisation et inversion de données cinématiques complexes en 3D." Pau, 1997. http://www.theses.fr/1997PAUU3010.
Hélie, Thomas. "Modélisation physique d'instruments de musique en systèmes dynamiques et inversion." Paris 11, 2002. http://www.theses.fr/2002PA112315.
This work deals with the modeling and the inversion process "sound/instrumental gesture" of musical instruments with like standard application : brasses and production of the voice. The physical modeling has large a interest for the sound synthesis since it generates not only the sound but also the behavior of the instrument (attacks, transients, false notes, etc). For these reasons, the difficulty of playing with virtual instruments is comparable to that of real instruments. The difficulty of controlling such models leads to the question of the inversion process : "how do I control my model to obtain this target sound that this musician obtained with his own instrument?" To cope with this problematic, we first indicate that the synthesis modeling and the associated inverse system may be thought together. Our thesis presents a work aiming to obtain mathematic objects as simple as possible. The problem of the excitor (lips, reeds, etc. . ) has been considered during our Master's Thesis. That of the resonator (description of the propagation in a pipe with a varying cross-section and its radiation) are thus the principal object of this work. In the first part, we establish a new model 1D of the acoustic propagation in axisymmetrical pipes with a slowly varying cross-section. This model makes it possible to take into account for example the motion of walls (case adapted with the vocal tract), or the existence of visco-thermic losses (which involes fractional derivatives). For this last case, it is possible of represent the whole guide by concatenating input-ouput systems associated with pieces of pipes locally adapted with the curvature of the pipe. As the involved transfer functions are too complicated to allow the derivation of a low cost time-simulation, we propose two methods which approach them with linear differential systems of finite order with delay. These methods are based on, respectively, troncated divergent series, and the theory of the diffusive representations of pseudo-differential operators. In the second part, a new model of the radiation of the bell which takes the wavefront curvature is developed and used to model the boundary condition at the output of the instrument. The results of this work may be used for the study of the brasses and, partially, for the vocal tract
Cognet, Jean-Marc. "Inversion sismique : identification du signal source et modélisation des réflexions multiples." Paris 9, 2001. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=2001PA090016.
Breton, Sylvain. "Dynamique des surfaces planétaires actives : quantification des paysages, modélisation et inversion." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1280.
Impact crater are often used in the study of planetary surfaces. On the one hand, statistics on crater number provide the age of the surface, on the other hand, their shapes reflect the surface processes they witnessed. This study combines the statistic and morphology approaches in order to investigate the timing and intensity of sedimentary and volcanic processes of planetary surfaces. The use of crater depth measurements add a dimension to frequency distributions with the introduction of size and depth frequency distribution (SDFD). SDFSs can be interpreted in term of crater obliteration rates thanks to crater chronology models. We also developed models of crater population taking into account obliteration. Mars surface is highly cratered with many craters displaying signs of modifications by volcanic process, sedimentation and erosion. We interpreted SDFDs using a classic crater chronology system, to produce global maps of obliteration at different epochs of Mars. During Noachian, obliteration rates reach several thousands m/Gy, but rapidly decrease during early Hesperian and are close to 0 during Amazonian. Obliteration on the province of Tharsis decreased slower, suggesting a persistence of volcanic activity until early Amazonian. Northern lowlands witness Amazonian obliteration rates one order of magnitude higher than the rest of the planet, which may indicate the continuous formation of Vastitas Borealis during middle Amazonian. In addition to our global approach, we computed recent obliteration rates from mapping of high resolution images on landing sites of rover missions. Mawrth Vallis and Oxia Planum present significant obliteration rates, especially on units containing hydrated minerals
Furst, Séverine. "Multi-objective optimization for joint inversion of geodetic data." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS017/document.
The Earth’s surface is affected by numerous local processes like volcanic events, landslides or earthquakes. Along with these natural processes, anthropogenic activities including extraction and storage of deep resources (e.g. minerals, hydrocarbons) shape the Earth at different space and time scales. These mechanisms produce ground deformation that can be detected by various geodetic instruments like GNSS, InSAR, tiltmeters, for example. The purpose of the thesis is to develop a numerical tool to provide the joint inversion of multiple geodetic data associated to plate deformation or volume strain change at depth. Four kinds of applications are targeted: interseismic plate deformation, volcano deformation, deep mining, and oil & gas extraction. Different inverse model complexities were considered: the I-level considers a single type of geodetic data with a time independent process. An application is made with inverting GPS data across southern California to determine the lateral variations of lithospheric rigidity (Furst et al., 2017). The II-level also accounts for a single type of geodetic data but with a time-dependent process. The joint determination of strain change history and the drift parameters of a tiltmeter network is studied through a synthetic example (Furst et al., submitted). The III-level considers different types of geodetic data and a timedependent process. A fictitious network made by GNSS, InSAR, tiltmeters and levelling surveys is defined to compute the time dependent volume change of a deep source of strain. We develop a methodology to implement these different levels of complexity in a single software. Because the inverse problem is possibly ill-posed, the functional to minimize may display several minima. Therefore, a global optimization algorithm is used (Mohammadi and Saïac, 2003). The forward part of the problem is treated by using a collection of numerical and analytical elastic models allowing to model the deformation processes at depth. Thanks to these numerical developments, new advances for inverse geodetic problems should be possible like the joint inversion of various types of geodetic data acquired for volcano monitoring. In this perspective, the possibility to determine by inverse problem the tiltmeter drift parameters should allow for a precise determination of deep strain sources. Also, the developed methodology can be used for an accurate monitoring of oil & gas reservoir deformation
Jurado, Fabrice. "Modélisation sismique et inversion non linéaire pour les milieux 3D élastiques tabulaires." Montpellier 2, 1992. http://www.theses.fr/1992MON20244.
Частини книг з теми "Modélisation inversion":
BATO, Mary Grace, Virginie PINEL, and Yajing YAN. "Assimilation de données ensembliste en volcanologie." In Inversion et assimilation de données de télédétection, 133–67. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9142.ch4.