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Auteur Wenmin Shi |
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Optimierung von hybriden geodatischen Überwachungsnetzen von Bauwerken am Beispiel von Staumauern / Wenmin Shi (1993)
Titre : Optimierung von hybriden geodatischen Überwachungsnetzen von Bauwerken am Beispiel von Staumauern Titre original : [Optimisation des réseaux géodésiques hybrides de surveillance de l'habitat au travers de l'exemple des barrages] Type de document : Thèse/HDR Auteurs : Wenmin Shi, Auteur Editeur : Zurich : Institut für Geodäsie und Photogrammetrie IGP - ETH Année de publication : 1993 Collection : IGP Mitteilungen, ISSN 0252-9335 num. 052 Importance : 154 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-906513-48-5 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Topographie
[Termes IGN] auscultation d'ouvrage
[Termes IGN] barrage
[Termes IGN] habitat (urbanisme)
[Termes IGN] modèle mathématique
[Termes IGN] optimisation (mathématiques)
[Termes IGN] réseau géodésique
[Termes IGN] surveillance d'ouvrage
[Termes IGN] système de coordonnéesIndex. décimale : 32.00 Topographie - généralités Résumé : (auteur) Geometrical monitoring of civil constructions is one of the important tasks of engineering surveying. By measurement the points of the object space and the points of the reference space are connected with each other. Their displacement (deformation) will be determined. Deformation monitoring surveying has unlimited duration. It demands generally high accuracy and are very expensive. Geodetic optimizations distinguish themselves according to different criterions. Up to now the optimization from zero to second order have been studied. The presented dissertation concentrates on the third order optimization, i.e. on the optimization of the network configuration and plan of observations according to the criterion of cost versus accuracy, homogeneity and isotropy. Because all Observation networks have a rieh redundance and a good geometric and observational configuration, gross errors can be discovered and the numerical reliability a priori can be ensured. Therefore the reliability will not be discussed in this study. Usually geodetic monitoring measurement consist of different networks. There exist very complex relations between geometric configuration, plan of observations, cost and accuracy. It is difficult to use the well-known optimization methods like linear and quadratic programming in the modelling and optimization. Therefore the heuristic method has been used in this paper. In tmonitoring surveying the Observation and data processing need high precision. Simultaneous adjustment of all data involved is necessary. The angle of the plummet convergence is not negligible. In this thesis the integrated adjustment of hybrid observations by fulfilling the above mentioned requirements has been carried out The subjects of this research are the following:
a) Suggestion of two coordinate Systems, in which the figure of the objects (spatial form and size) will be represented without any distortion. The simplified System is suggested for optimization and the extended System for applications in practice.
b) Establishing of a fictional model for the general adjustment of hybrid observations, i.e. the classic geodetic observations, a new kind of geodetic observations and the so-called physical-geometrical measurements.
c) Creation of a modular and effective program system. Using this System it is possible to handle a large configuration in a very short time for the optimization. Also the change of the stochastic model is easy.
d) Extensive computation of many different optimization examples under the criterion of precision versus working cost. The results of the optimizations will be heuristically derived from these examples.
e) Concreto suggestions for the optimal construction of hybrid monitoring networks.Numéro de notice : 56443 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-001304722 En ligne : http://dx.doi.org/10.3929/ethz-a-001304722 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60031 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 56443-01 32.00 Livre Centre de documentation Topographie Disponible 56443-02 32.00 Livre Centre de documentation Topographie Disponible