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Comparison among three harmonic analysis techniques on the sphere and the ellipsoid / Hussein Abd-Elmotaal in Journal of applied geodesy, vol 8 n° 1 (April 2014)
[article]
Titre : Comparison among three harmonic analysis techniques on the sphere and the ellipsoid Type de document : Article/Communication Auteurs : Hussein Abd-Elmotaal, Auteur ; Kurt Seitz, Auteur ; Mostafa Abd-Elbaky, Auteur ; Bernhard Heck, Auteur Année de publication : 2014 Article en page(s) : pp 1 - 19 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] analyse comparative
[Termes IGN] anomalie de pesanteur
[Termes IGN] Earth Gravity Model 2008
[Termes IGN] ellipsoïde (géodésie)
[Termes IGN] harmonique ellipsoïdale
[Termes IGN] harmonique sphérique
[Termes IGN] méthode des moindres carrés
[Termes IGN] transformation rapide de FourierRésumé : (Auteur) The paper presents a comparison among three different techniques for harmonic analysis on the sphere and the ellipsoid. The EGM2008 global geopotential model has been used up to degree and order 360 in order to create gravity anomaly fields on both the sphere and the ellipsoid as the function fields of the current investigation. Harmonic analysis has then been carried out to compute the dimensionless potential coeficients using the created function fields. Three different harmonic analysis techniques have been applied: the least-squares technique, the Fast Fourier Transform (FFT) technique and the Gauss-Legendre numerical integration technique. The computed coeficients in spherical harmonics have then been compared with EGM2008 (in the frequency domain) and the computed fields on the sphere and the ellipsoid have been compared with fields created by EGM2008 up to degree and order 360 (in the space domain) in order to estimate the accuracy of the three different harmonic analysis techniques used within the current investigation. The results proved that the least-squares technique gives the best accuracy both in frequency and space domain. The FFT technique provides quite good results in a very short cpu time. The Gauss-Legendre technique gives the worst results among the presented techniques, but still the residuals in the space domain are negligibly small. Numéro de notice : A2014-270 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2013-0008 En ligne : http://www.degruyter.com/view/j/jag.2014.8.issue-1/jag-2013-0008/jag-2013-0008.x [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33173
in Journal of applied geodesy > vol 8 n° 1 (April 2014) . - pp 1 - 19[article]
Titre : Data Analysis : Statistical and Computational Methods for Scientists and Engineers Type de document : Monographie Auteurs : Siegmund Brandt, Auteur Editeur : Springer International Publishing Année de publication : 2014 Importance : 532 p. ISBN/ISSN/EAN : 978-3-319-03762-2 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Statistiques
[Termes IGN] analyse de variance
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] méthode des moindres carrés
[Termes IGN] méthode du maximum de vraisemblance (estimation)
[Termes IGN] probabilités
[Termes IGN] régression
[Termes IGN] série temporelle
[Termes IGN] statistiques
[Termes IGN] variable aléatoireRésumé : (éditeur) The fourth edition of this successful textbook presents a comprehensive introduction to statistical and numerical methods for the evaluation of empirical and experimental data. Equal weight is given to statistical theory and practical problems. The concise mathematical treatment of the subject matter is illustrated by many examples, and for the present edition a library of Java programs has been developed. It comprises methods of numerical data analysis and graphical representation as well as many example programs and solutions to programming problems. The programs (source code, Java classes, and documentation) and extensive appendices to the main text are available for free download from the book’s page at www.springer.com.
Contents: Probabilities. Random variables. Random numbers and the Monte Carlo Method. Statistical distributions (binomial, Gauss, Poisson). Samples. Statistical tests. Maximum Likelihood. Least Squares. Regression. Minimization. Analysis of Variance. Time series analysis.
Audience: The book is conceived both as an introduction and as a work of reference. In particular it addresses itself to students, scientists and practitioners in science and engineering as a help in the analysis of their data in laboratory courses, working for bachelor or master degrees, in thesis work, and in research and professional work.Note de contenu : 1- Introduction
2- Probabilities
3- Random Variables: Distributions
4- Computer Generated Random Numbers: The Monte Carlo Method
5- Some Important Distributions and Theorems
6- Samples
7- The Method of Maximum Likelihood
8- Testing Statistical Hypotheses
9- The Method of Least Squares
10- Function Minimization
11- Analysis of Variance
12- Linear and Polynomial Regression
13- Time Series AnalysisNuméro de notice : 25778 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Monographie En ligne : https://doi.org/10.1007/978-3-319-03762-2 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94973
Titre de série : Selected papers, Tome 3 Titre : Version 5.d Type de document : Guide/Manuel Auteurs : Abdelmajid Ben Hadj Salem, Auteur Editeur : Tunis [Tunisie] : République tunisienne. Ministère de l’Equipement et de l’Environnement Année de publication : 2014 Autre Editeur : Tunis : Office de la Topographie et de la Cartographie OTC Importance : 95 p. Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géodésie
[Termes IGN] détermination par hauteurs égales
[Termes IGN] mécanique céleste
[Termes IGN] méthode des moindres carrés
[Termes IGN] méthode robuste
[Termes IGN] orbite
[Termes IGN] problème des deux corps
[Termes IGN] problème des trois corps
[Termes IGN] topographie
[Termes IGN] TunisieNote de contenu : Partie 1 Éléments de géodésie et d’astronomie
53. La méthode des moindres carrés et les estimateurs robustes
54. Histoire de la topographie en Tunisie : les coordonnées origines fuseaux
55. Calcul des soirées de hauteurs égales par la méthode des moindres carrés
Partie 2 Éléments de mécanique céleste : sur le mouvement de N corps
56. Le mouvement de n corps
57. Notions sur le mouvement d’un satellite artificiel de la Terre
58. Le mouvement de 2 corps
59. Les équations du mouvement de 3 corpsNuméro de notice : 19747 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84218 Documents numériques
en open access
Selected papers de l’ingénieur général, Tome 3. Version 5.d (3)Adobe Acrobat PDF The use of single-date MODIS imagery for estimating large-scale urban impervious surface fraction with spectral mixture analysis and machine learning techniques / Chengbin Deng in ISPRS Journal of photogrammetry and remote sensing, vol 86 (December 2013)
[article]
Titre : The use of single-date MODIS imagery for estimating large-scale urban impervious surface fraction with spectral mixture analysis and machine learning techniques Type de document : Article/Communication Auteurs : Chengbin Deng, Auteur ; Changshan Wu, Auteur Année de publication : 2013 Article en page(s) : pp 100 - 110 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse de mélange spectral d’extrémités multiples
[Termes IGN] analyse des mélanges spectraux
[Termes IGN] apprentissage automatique
[Termes IGN] image multibande
[Termes IGN] image Terra-MODIS
[Termes IGN] méthode des moindres carrés
[Termes IGN] surface imperméable
[Termes IGN] zone urbaineRésumé : (Auteur) Urban impervious surface information is essential for urban and environmental applications at the regional/national scales. As a popular image processing technique, spectral mixture analysis (SMA) has rarely been applied to coarse-resolution imagery due to the difficulty of deriving endmember spectra using traditional endmember selection methods, particularly within heterogeneous urban environments. To address this problem, we derived endmember signatures through a least squares solution (LSS) technique with known abundances of sample pixels, and integrated these endmember signatures into SMA for mapping large-scale impervious surface fraction. In addition, with the same sample set, we carried out objective comparative analyses among SMA (i.e. fully constrained and unconstrained SMA) and machine learning (i.e. Cubist regression tree and Random Forests) techniques. Analysis of results suggests three major conclusions. First, with the extrapolated endmember spectra from stratified random training samples, the SMA approaches performed relatively well, as indicated by small MAE values. Second, Random Forests yields more reliable results than Cubist regression tree, and its accuracy is improved with increased sample sizes. Finally, comparative analyses suggest a tentative guide for selecting an optimal approach for large-scale fractional imperviousness estimation: unconstrained SMA might be a favorable option with a small number of samples, while Random Forests might be preferred if a large number of samples are available. Numéro de notice : A2013-705 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.09.010 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.09.010 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32841
in ISPRS Journal of photogrammetry and remote sensing > vol 86 (December 2013) . - pp 100 - 110[article]Automated detection of slum area change in Hyderabad, India using multitemporal satellite imagery / Oleksandr Kit in ISPRS Journal of photogrammetry and remote sensing, vol 83 (September 2013)
[article]
Titre : Automated detection of slum area change in Hyderabad, India using multitemporal satellite imagery Type de document : Article/Communication Auteurs : Oleksandr Kit, Auteur ; Matthias Lüdeke, Auteur Année de publication : 2013 Article en page(s) : pp 130 - 137 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] agglomération
[Termes IGN] bidonville
[Termes IGN] détection automatique
[Termes IGN] détection de changement
[Termes IGN] filtre de Canny
[Termes IGN] image multitemporelle
[Termes IGN] image satellite
[Termes IGN] Inde
[Termes IGN] méthode des moindres carrésRésumé : (Auteur) This paper presents an approach to automated identification of slum area change patterns in Hyderabad, India, using multi-year and multi-sensor very high resolution satellite imagery. It relies upon a lacunarity-based slum detection algorithm, combined with Canny- and LSD-based imagery pre-processing routines. This method outputs plausible and spatially explicit slum locations for the whole urban agglomeration of Hyderabad in years 2003 and 2010. The results indicate a considerable growth of area occupied by slums between these years and allow identification of trends in slum development in this urban agglomeration. Numéro de notice : A2013-491 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2013.06.009 En ligne : https://doi.org/10.1016/j.isprsjprs.2013.06.009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32629
in ISPRS Journal of photogrammetry and remote sensing > vol 83 (September 2013) . - pp 130 - 137[article]Réservation
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