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Titre : Computational Physics Type de document : Guide/Manuel Auteurs : Philipp Scherer, Auteur Editeur : Springer International Publishing Année de publication : 2013 Importance : 454 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-3-319-00401-3 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Physique
[Termes IGN] collocation
[Termes IGN] dynamique des fluides
[Termes IGN] équation linéaire
[Termes IGN] interpolation
[Termes IGN] Java (langage de programmation)
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] problème du voyageur de commerce
[Termes IGN] quantum (physique)
[Termes IGN] thermodynamique
[Termes IGN] transformation de Fourier
[Termes IGN] trigonométrieRésumé : (éditeur) This textbook presents basic and advanced computational physics in a very didactic style. It contains very-well-presented and simple mathematical descriptions of many of the most important algorithms used in computational physics. The first part of the book discusses the basic numerical methods. The second part concentrates on simulation of classical and quantum systems. Several classes of integration methods are discussed including not only the standard Euler and Runge Kutta method but also multi-step methods and the class of Verlet methods, which is introduced by studying the motion in Liouville space. A general chapter on the numerical treatment of differential equations provides methods of finite differences, finite volumes, finite elements and boundary elements together with spectral methods and weighted residual based methods. The book gives simple but non trivial examples from a broad range of physical topics trying to give the reader insight into not only the numerical treatment but also simulated problems. Different methods are compared with regard to their stability and efficiency. The exercises in the book are realised as computer experiments. Note de contenu : I- Numerical Methods
II- Simulation of Classical and Quantum SystemsNuméro de notice : 25827 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Manuel En ligne : https://doi.org/10.1007/978-3-319-00401-3 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95121 Spectral analysis of structural deformation - A case study / Alojz Kopacik in Journal of applied geodesy, vol 6 n° 3-4 (November 2012)
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Titre : Spectral analysis of structural deformation - A case study Type de document : Article/Communication Auteurs : Alojz Kopacik, Auteur ; Imrich Liptak, Auteur Année de publication : 2012 Article en page(s) : pp 159 - 166 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] analyse spectrale
[Termes IGN] auscultation d'ouvrage
[Termes IGN] Bratislava
[Termes IGN] déformation d'édifice
[Termes IGN] lever tachéométrique
[Termes IGN] pont
[Termes IGN] surveillance d'ouvrage
[Termes IGN] transformation rapide de FourierRésumé : (Auteur) Building structures are extremely sensitive to the influence of outdoor conditions. The most frequent types of outdoor conditions are the influence of wind, sunshine, changes in the temperature of a building's surroundings and, lastly, the effect of a buildings own loading or the improper loading by another source. According to the resonance of the structure with its surroundings, vibrations and oscillations at relatively high frequency intervals (0.1–100.0 Hz) also occur. These phenomena significantly affect the static and dynamic characteristics of structures, as well as their safety and functionality. The paper provides an example of the monitoring of these phenomena using geodetic methods at two different types of structures. The first example is an industrial structure with a cylindrical shape, the monitoring of which was made by a total station with a measuring frequency of approximately 2 Hz. The second example is the Apollo Bridge on the Danube in Bratislava (Slovakia), the steel structure of which was measured by acceleration sensors with a frequency of up to 10 Hz. The central aim of the paper is an analysis of the dynamic behavior of both structures using spectral analysis methods. The use of the Fast Fourier Transform (FFT) and the Lomb–Scargle periodogram is described; the structure's own frequencies and the amplitudes of the structure's oscillations are calculated. Numéro de notice : A2012-596 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : doi.org/10.1515/jag-2012-0023 En ligne : http://www.degruyter.com/view/j/jag.2012.6.issue-3-4/jag-2012-0023/jag-2012-0023 [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32042
in Journal of applied geodesy > vol 6 n° 3-4 (November 2012) . - pp 159 - 166[article]The application of the model of coordinate S-transformation for stability analysis of datum points in high-precision GPS deformation monitoring networks / Jiming Guo in Journal of applied geodesy, vol 6 n° 3-4 (November 2012)
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Titre : The application of the model of coordinate S-transformation for stability analysis of datum points in high-precision GPS deformation monitoring networks Type de document : Article/Communication Auteurs : Jiming Guo, Auteur ; Mengyun Zhou, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 143 - 148 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] centrale hydroélectrique
[Termes IGN] Chine
[Termes IGN] coordonnées géodésiques
[Termes IGN] positionnement par GPS
[Termes IGN] réseau géodésique spécifique
[Termes IGN] surveillance d'ouvrage
[Termes IGN] transformation de coordonnées
[Termes IGN] transformation de FourierRésumé : (Auteur) Based on the model of coordinate S-transformation, a novel method of stability analysis of datum points in high-precision GPS deformation monitoring networks is proposed. The model of coordinate S-transformation is used to calculate seven transformation parameters in adjacent two measurement stages, in order to confirm the stability of stations by coordinate differences. To judge the stability of stations, in comparison to the traditional method by a fixed the same datum point, the “threshold approach” and “statistical test approach” have been developed and applied to evaluate the stability of datum points of a first-order GPS deformation monitoring network of a hydropower station located in the West Region of China. Numéro de notice : A2012-595 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2012-0028 En ligne : https://doi.org/10.1515/jag-2012-0028 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32041
in Journal of applied geodesy > vol 6 n° 3-4 (November 2012) . - pp 143 - 148[article]Detecting and correcting motion blur from images shot with channel-dependent exposure time / Lâmân Lelégard in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol I-3 (2012)
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Titre : Detecting and correcting motion blur from images shot with channel-dependent exposure time Type de document : Article/Communication Auteurs : Lâmân Lelégard , Auteur ; Emeric Delaygue, Auteur ; Mathieu Brédif , Auteur ; Bruno Vallet , Auteur Année de publication : 2012 Conférence : ISPRS 2012, Commission 3, 22th international congress 25/08/2012 01/09/2012 Melbourne Australie OA ISPRS Annals Commission 3 Article en page(s) : pp 341 - 346 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] détection de flou
[Termes IGN] image aérienne
[Termes IGN] image floue
[Termes IGN] image multibande
[Termes IGN] restauration d'image
[Termes IGN] transformation de FourierRésumé : (auteur) This article describes a pipeline developed to automatically detect and correct motion blur due to the airplane motion in aerial images provided by a digital camera system with channel-dependent exposure times. Blurred images show anisotropy in their Fourier Transform coefficients that can be detected and estimated to recover the characteristics of the motion blur. To disambiguate the anisotropy produced by a motion blur from the possible spectral anisotropy produced by some periodic patterns present in a sharp image, we consider the phase difference of the Fourier Transform of two channel shot with different exposure times (i.e. with different blur extensions). This is possible because of the deep correlation between the three visible channels ensures phase coherence of the Fourier Transform coefficients in sharp images. In this context, considering the phase difference constitutes both a good detector and estimator of the motion blur parameters. In order to improve on this estimation, the phase difference is performed on local windows in the image where the channels are more correlated. The main lobe of the phase difference, where the phase difference between two channels is close to zero actually imitates an ellipse which axis ratio discriminates blur and which orientation and minor axis give respectively the orientation and the blur kernel extension of the long exposure-time channels. However, this approach is not robust to the presence in the phase difference of minor lobes due to phase sign inversions in the Fourier transform of the motion blur. They are removed by considering the polar representation of the phase difference. Based on the blur detection step, blur correction is eventually performed using two different approaches depending on the blur extension size: using either a simple frequency-based fusion for small blur or a semi blind iterative method for larger blur. The higher computing costs of the latter method make it only suitable for large motion blur, when the former method is not applicable. Numéro de notice : A2012-709 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5194/isprsannals-I-3-341-2012 En ligne : http://dx.doi.org/10.5194/isprsannals-I-3-341-2012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82688
in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences > vol I-3 (2012) . - pp 341 - 346[article]Extraction of vineyards out of aerial photo-image using texture information / Arnaud Le Bris in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol I-3 (2012)
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Titre : Extraction of vineyards out of aerial photo-image using texture information Type de document : Article/Communication Auteurs : Arnaud Le Bris , Auteur Année de publication : 2012 Conférence : ISPRS 2012, Commission 3, 22th international congress 25/08/2012 01/09/2012 Melbourne Australie OA ISPRS Annals Commission 3 Article en page(s) : pp 383 - 388 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] détection automatique
[Termes IGN] occupation du sol
[Termes IGN] orthoimage
[Termes IGN] SIFT (algorithme)
[Termes IGN] transformation de Fourier
[Termes IGN] viticultureRésumé : (auteur) A cartography of vineyards is required by many mapping agencies, both to draw topographic maps and to complete the "vineyard" layer of large scale land cover databases. In this paper, two distinct approaches are proposed and tested to achieve a (semi-)automatic detection of vineyards task out of 50cm ground resolution ortho-images. Both are object based approaches relying on image texture analysis in homogeneous land cover regions. Therefore, the first step (common to both approaches) is a segmentation of the image into homogeneous land cover regions. These regions can then be classified as vineyards or not by the next approaches. A first approach consists in a frequency analysis of the image texture in each region. A semi-variogram is first calculated from the ortho-image for each region of the segmentation. A Fourier transform (FFT) of this semi-variogram of the image is then considered. If a periodic signal with a high frequency (i.e. of which the frequency is upper than a threshold) is identified, the region is labelled as a vineyard. The second approach is a supervised (per region) land cover classification one. It uses texture indexes calculated from ortho-images as input image information. In particular, some texture indexes derived from SIFT descriptors calculated from ortho-images have been used in the experiments, giving good results. Numéro de notice : A2012-761 Affiliation des auteurs : LASTIG MATIS (2012-2019) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.5194/isprsannals-I-3-383-2012 Date de publication en ligne : 23/07/2012 En ligne : https://doi.org/10.5194/isprsannals-I-3-383-2012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101199
in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences > vol I-3 (2012) . - pp 383 - 388[article]On the detectability of synthetic disturbances in FG5 absolute gravimetry data using lomb-scargle analysis / M. Orlob in Geomatica, vol 66 n° 2 (June 2012)PermalinkCorrection du flou de mouvement sur les images prises de nuit par le STEREOPOLIS / Vincent Daval (2012)PermalinkInterference suppression algorithm for SAR based on time-frequency transform / S. Zhang in IEEE Transactions on geoscience and remote sensing, vol 49 n° 10 Tome 1 (October 2011)PermalinkMathématiques pour le traitement du signal / M. Bergounioux (2010)PermalinkMotion blur detection in aerial images shot with channel-dependent exposure time / Lâmân Lelégard (2010)PermalinkNavigation Signal Processing for GNSS Software Receivers / T. Pany (2010)PermalinkMerging hyperspectral and panchromatic image data: qualitative and quantitative analysis / M. Cetin in International Journal of Remote Sensing IJRS, vol 30 n° 7 (April 2009)PermalinkAnalyse et traitement des signaux / E. Tisserand (2008)PermalinkImagerie spatiale / P. Lier (2008)PermalinkIntroduction au traitement d'images / D. Lingrand (2008)PermalinkModern radar systems / H. Meikle (2008)PermalinkFFT-enhanced IHS transform method for fusing high-resolution satellite images / Y. Ling in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 6 (February 2007)PermalinkElectronique pour le traitement du signal en huit volumes avec problèmes corrigés, volume 6. Filtrage numérique / Yvon Mori (2007)PermalinkERS-2 SAR and IRS-1C LISS III data fusion: a PCA approach to improve remote sensing based geological interpretation / T.J. Majumdar in ISPRS Journal of photogrammetry and remote sensing, vol 61 n° 5 (January 2007)PermalinkLe traitement du signal sous Matlab / André Quinquis (2007)PermalinkFourier series and the cartographic line / G.J. Lawford in International journal of geographical information science IJGIS, vol 20 n° 1 (january 2006)PermalinkTraitement numérique du signal / M. Bellanger (2006)PermalinkGravimétrie, géoïde et nivellement par GPS en Belgique / Henri Duquenne in XYZ, n° 105 (décembre 2005 - février 2006)PermalinkFundamentals of radar signal processing / M. Richards (2005)PermalinkThéorie élémentaire du signal / Luc Jolivet (2005)Permalink