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Auteur D. Huang |
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A phase space reconstruction based single channel ICA algorithm and its application in dam deformation analysis / W. Dai in Survey review, vol 47 n° 345 (November 2015)
[article]
Titre : A phase space reconstruction based single channel ICA algorithm and its application in dam deformation analysis Type de document : Article/Communication Auteurs : W. Dai, Auteur ; D. Huang, Auteur ; B. Liu, Auteur Année de publication : 2015 Article en page(s) : pp 387 - 396 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie moderne
[Termes IGN] analyse en composantes indépendantes
[Termes IGN] barrage
[Termes IGN] filtrage du bruit
[Termes IGN] modèle de régression
[Termes IGN] niveau de l'eau
[Termes IGN] surveillance d'ouvrage
[Termes IGN] températureRésumé : (auteur) Separating noise, systematic errors and deformation components that are caused by different forces such as water pressure and temperature should be identified from dam deformation monitoring data to facilitate effective dam deformation analysis and consequently determine the potential dam structural damage. As source signals are assumed to be mutually independent, independent component analysis (ICA) can be used to separate the source signals from their mixtures. In addition to signal independence, another requirement of ICA theory is that the number of mixtures should not be less than that of source signals. Unfortunately, in most cases of dam deformation monitoring, only a single channel of observed displacement data is available for each monitoring point. Therefore, ICA with single channel data input (called single channel ICA) is necessary in the application of deformation analysis. In this paper, we apply a phase space reconstruction based single channel ICA (PSR-ICA) algorithm to de-noise deformation monitoring data and separate deformation components introduced by different forces from these de-noised data. A numerical simulation is conducted, and results indicate that PSR-ICA is an efficient tool not only for denoising data but also for separating deformation components caused by different forces. PSR-ICA is then further utilised to process the displacement monitoring data of Wuqiangxi Dam. Results indicate that the two extracted main displacement components are nearly consistent with the displacement components; temperature and water level are used as variables and are computed by using a regression model. Both numerical simulated and real life dams demonstrate that PSR-ICA is an effective tool for separating deformation components by different causative forces and is therefore beneficial to dam deformation analysis. Numéro de notice : A2015-945 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1179/1752270614Y.0000000139 En ligne : https://doi.org/10.1179/1752270614Y.0000000139 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79649
in Survey review > vol 47 n° 345 (November 2015) . - pp 387 - 396[article]Cybercity GIS (CCGIS): integration of DEMs, images, and 3D models / Q. Zhu in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 4 (April 2002)
[article]
Titre : Cybercity GIS (CCGIS): integration of DEMs, images, and 3D models Type de document : Article/Communication Auteurs : Q. Zhu, Auteur ; D. Li, Auteur ; Y. Zhang, Auteur ; Z. Zhong, Auteur ; D. Huang, Auteur Année de publication : 2002 Article en page(s) : pp 361 - 367 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] milieu urbain
[Termes IGN] modèle numérique de surface
[Termes IGN] modélisation 3D
[Termes IGN] réalité virtuelle
[Termes IGN] système d'information géographique
[Termes IGN] système d'information urbain
[Termes IGN] ville
[Termes IGN] visualisation 3DRésumé : (Auteur) A GyberCity is a virtual representation of a city that enables a person to explore and interact, in cyberspace, with the vast amount of environmental and cultural information gathered about the city. A GIS software for CyberCity, called CCGIS, has been developed, and this paper reports its technical characteristics, including the threedimensional hierarchical modeling technique, the integrated database structure, and the interactive method of visualization of the threedimensional data of urban environments. The effective integrated data organization strategy for dynamical loading and progressive rendering, which enables CCGIS to support the development, design, and presentation of a large CyberCity. is stressed. Finally, a pilot project for CCGIS software application is also demonstrated. Numéro de notice : A2002-068 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : sans En ligne : https://vrlab.org.cn/~zhuq/paper/2002-CyberCity%20GIS%20(CCGIS)%20Integration%20 [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21984
in Photogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 4 (April 2002) . - pp 361 - 367[article]