Centre de documentation
scientifique

A critical analysis of methods for rapid and nondestructive determination of wood density in standing trees / Shan Gao in Annals of Forest Science, vol 74 n° 2 (June 2017)  

Public [article]  inAnnals of Forest Science > vol 74 n° 2 (June 2017) Titre : A critical analysis of methods for rapid and nondestructive determination of wood density in standing trees Type de document : Article/Communication Auteurs : Shan Gao, Auteur ; Xiping Wang, Auteur ; Michael C. Wiemann, Auteur ; et al., Auteur Année de publication : 2017 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes IGN] analyse de sensibilité [Termes IGN] densité du bois [Termes IGN] forage [Termes IGN] instrument de mesure [Termes IGN] résistance des matériaux Résumé : (auteur) Key message: Field methods for rapid determination of wood density in trees have evolved from increment borer, torsiometer, Pilodyn, and nail withdrawal into sophisticated electronic tools of resistance drilling measurement. A partial resistance drilling approach coupled with knowledge of internal tree density distribution may offer an alternative solution for wood density surveys in the future. Context: Finding ways to nondestructively assess wood density in trees has been a quest by foresters and wood scientists around the world. In the past several decades, traditional increment borer methods have gradually evolved into sophisticated electronic tools of resistance drilling measurements. Aims: We provide a comprehensive review of research development in the use of several field nondestructive methods for rapid determination of wood density in trees and discuss pros and cons of each method for field applications. Results: The use of the increment borer has been a standard method for assessing wood density in trees, and it has been further developed into a system approach allowing the use of outer wood cores and knowledge of internal density distribution for predicting wood density of major tree components. Studies on the use of torsiometer, Pilodyn, and nail withdrawal tools have had very limited success and do not warrant replacement of the increment borer. Resistance drilling, on the other hand, has emerged as a potential tool for more efficient and economical collection of wood density information in trees. Conclusion: The resistance drilling method has considerable advantages over other methods in terms of less damage to trees, faster operation, and higher measurement sensitivity. Internal friction is a key factor that currently hinders further application. Numéro de notice : A2017-110 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-017-0623-4 Date de publication en ligne : 22/03/2017 En ligne : https://doi.org/10.1007/s13595-017-0623-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84501 [article]

Monitoring 3D vibrations in structures using high-resolution blurred imagery / David M.J. McCarhy in Photogrammetric record, vol 31 n° 155 (September - November 2016)  

Public [article]  inPhotogrammetric record > vol 31 n° 155 (September - November 2016) . - pp 304 - 324 Titre : Monitoring 3D vibrations in structures using high-resolution blurred imagery Type de document : Article/Communication Auteurs : David M.J. McCarhy, Auteur ; Jim H. Chandler, Auteur ; Alessandro Palmeri, Auteur Année de publication : 2016 Article en page(s) : pp 304 - 324 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] déformation d'édifice [Termes IGN] données localisées 3D [Termes IGN] image floue [Termes IGN] résistance des matériaux [Termes IGN] surveillance d'ouvrage [Termes IGN] test statistique [Termes IGN] vibration Résumé : (Auteur) Photogrammetry has been used in the past to monitor the laboratory testing of civil engineering structures using multiple image-based sensors. This has been successful, but detecting vibrations during dynamic structural tests has proved more challenging because they usually depend on high-speed cameras which often results in lower image resolutions and reduced accuracy. To overcome this limitation, a novel approach has been devised to take measurements from blurred images in long-exposure photographs. The motion of the structure is captured in individual motion-blurred images without dependence on imaging speed. A bespoke algorithm then determines each measurement point's motion. Using photogrammetric techniques, a model structure's motion with respect to different excitation frequencies is captured and its vibration envelope recreated in 3D. The approach is tested and used to identify changes in the model's vibration response. Numéro de notice : A2016-723 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12156 Date de publication en ligne : 18/09/2016 En ligne : https://doi.org/10.1111/phor.12156 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82251 [article]

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106-2016031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

An image engineering system for the inspection of transparent construction materials / Stefan Hinz in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 3 (May - June 2009)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 64 n° 3 (May - June 2009) . - pp 297 - 307 Titre : An image engineering system for the inspection of transparent construction materials Type de document : Article/Communication Auteurs : Stefan Hinz, Auteur ; M. Stephani, Auteur ; L. Schiemann, Auteur ; K. Zeller, Auteur Année de publication : 2009 Article en page(s) : pp 297 - 307 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse d'image numérique [Termes IGN] matière plastique [Termes IGN] photogrammétrie métrologique [Termes IGN] reconstruction 3D [Termes IGN] résistance des matériaux Résumé : (Auteur) This article presents a modular photogrammetric recording and image analysis system for inspecting the material characteristics of transparent foils, in particular Ethylen-TetraFluorEthylen-Copolymer (ETFE) foils. The foils are put under increasing air pressure and are observed by a stereo camera system. Determining the time-variable 3D shape of transparent material imposes a number of challenges: especially the automatic point transfer between stereo images and, in temporal domain, from one image pair to the next. We developed an automatic approach that accommodates for these particular circumstances and allows reconstruction of the 3D shape for each epoch as well as determining 3D translation vectors between epochs by feature tracking. Examples including numerical results and accuracy measures prove the applicability of the system. Copyright ISPRS Numéro de notice : A2009-248 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2008.10.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2008.10.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29878 [article]

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081-09031	SL	Revue	Centre de documentation	Revues en salle	Disponible

Integrating imaging spectroscopy (445-2543nm) and geographic information systems for post-disaster management: a case of hailstorm damage in Sydney / S. Bhaskaran in International Journal of Remote Sensing IJRS, vol 25 n° 13 (July 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 13 (July 2004) . - pp 2625 - 2639 Titre : Integrating imaging spectroscopy (445-2543nm) and geographic information systems for post-disaster management: a case of hailstorm damage in Sydney Type de document : Article/Communication Auteurs : S. Bhaskaran, Auteur ; B. Datt, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 2625 - 2639 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] classification spectrale [Termes IGN] correction d'image [Termes IGN] dommage matériel [Termes IGN] géoréférencement [Termes IGN] gestion de crise [Termes IGN] grêle [Termes IGN] habitat urbain [Termes IGN] image aérienne [Termes IGN] image hyperspectrale [Termes IGN] intégration de données [Termes IGN] précipitation [Termes IGN] réalité de terrain [Termes IGN] résistance des matériaux [Termes IGN] risque naturel [Termes IGN] Sydney (Nouvelle-Galles du Sud) [Termes IGN] système d'information géographique [Termes IGN] vulnérabilité Résumé : (Auteur) This paper demonstrates a methodology for the analysis and integration of airborne hyperspectral sensor data (445-2543nm) with GIS data in order to develop a vulnerability map which has the potential to assist in decision making during post-disaster emergency operations. Hailstorms pose a threat to people as well as property in Sydney, Australia. Emergency planning demands current, large-scale spatio-temporal information on urban areas that may be susceptible to hailstones. Several regions, dominated by less resistant roofing materials, have a higher vulnerability to hailstorm damage than others. Post-disaster operations must focus on allocating dynamic resources to these areas. Remote sensing data, particularly airborne hyperspectral sensor data, consist of spectral bands with narrow bandwidths, and have the potential to quantify and distinguish between urban features such as roofing materials and other man-made features. A spectral library of surface materials from urban areas was created by using a full range spectroradiometer. The image was atmospherically corrected using the empirical line method. A spectral angle mapper (SAM) method, which is an automated method for comparing image spectra to laboratory spectra, was used to develop a classification map that shows the distribution of roofing materials with different resistances to hailstones. Surface truthing yielded high percentage accuracy. Spatial overlay technique was performed in a GIS environment where several types of cartographic data such as special hazard locations, population density, data about less mobile people and the street network were overlaid on the classified geo-referenced hyperspectral image. The integrated database product, which merges high quality spectral information and cartographic GIS data, has vast potential to assist emergency organizations, city planners and decision makers in formulating plans and strategies for resource management. Numéro de notice : A2004-261 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001642331 En ligne : https://doi.org/10.1080/01431160310001642331 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26788 [article]

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080-04111	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Cours de calcul matriciel appliqué / Maurice Denis-Papin (1969)

Public Titre : Cours de calcul matriciel appliqué Type de document : Guide/Manuel Auteurs : Maurice Denis-Papin, Auteur ; A. Kaufmann, Auteur Mention d'édition : 5e édition revue et corrigée Editeur : Paris : Albin Michel Année de publication : 1969 Importance : 358 p. Format : 16 x 24 cm Langues : Français (fre) Descripteur : [Vedettes matières IGN] Analyse numérique [Termes IGN] calcul matriciel [Termes IGN] distribution de Maxwell [Termes IGN] dynamique [Termes IGN] résistance des matériaux Numéro de notice : 46992 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Manuel de cours Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=47878

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
46992-01	DEP-RECG	Livre	Marne-la-Vallée	Dépôt en unité	Exclu du prêt