Добірка наукової літератури з теми "Surface thermique 3D"
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Статті в журналах з теми "Surface thermique 3D":
Zhang, Chi, Dajun Wu, Liming Shi, Yiping Zhu, Dayuan Xiong, Shaohui Xu, Rong Huang, et al. "Manganese molybdate nanoflakes on silicon microchannel plates as novel nano energetic material." Royal Society Open Science 4, no. 12 (December 2017): 171229. http://dx.doi.org/10.1098/rsos.171229.
Дисертації з теми "Surface thermique 3D":
Guilbert-Lepoutre, Aurélie. "Propriétés de surface et structure interne des objets Trans-Neptuniens et des Centaures : un nouveau modèle d'évolution thermique 3D." Paris 7, 2009. http://www.theses.fr/2009PA077246.
Small Icy bodies of the Solar System are mainly constituted by Transneptunian Objects and Centaurs. These two populations are composed of numerous bodies, whose dynamical, physical and chemical properties can be very different. Their observations have remained challenging until recently. Thus, the study of the Transneptunian région is a research field in rapid and constant evolution. TNOs and Centaurs should be composed of varions ices. At the very beginning of this thesis, an ESO Large Program has been undertaken, in order to constrain thé surface composition of a significant sample of bodies. I was in charge of the H+K spectra obtained with the new instrument SINFONI. I therefore had to establish an optimized observation technique and a performant data reduction procedure, for which each step has been widely tested. Each spectrum has been analyzed individually, and a radiative transfer model has been applied to determine the surface composition of each object. Absorption bands attributed to water ice and other volatil ices have been detected. The presence of some volatil ices on these objects' surfaces raises questions about the possible internal activity they can undergo. I consequently developed a three-dimensional thermal model, using a mathematical solution limiting the computation time. This new internal evolution model allows to compute lateral beat fluxes and 3D boundary conditions, without any excessive computation time. I tested the influence of the most critical parameters such as the formation time of the objects, the matrix thermal conductivity, etc. The main results throw new leads for the observations interpretation. Finally, I managed to draw a portrait of Centaur 10199 Chariklo: the data obtained in the framework of the Large Program show indeed important variations compared to the previously published ones. Several hypothesis are considered to explain these changes: spatial variations, temporal variations, or cometary outbursts. Observational data alone do not allow to discard any of those three explanations. I therefore applied the 3D thermal model which allows to exclude some temporal variations
Kurz, Britta. "Modélisation de l'anisotropie directionnelle de la température de surface : application au cas de milieux forestiers et urbains." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/609/.
The variability of the surface temperatures resulting from the coupling between energy and radiative transfers within canopies is prone to induce a strong directional anisotropy of measurements in the thermal infrared (TIR). A modelling approach developed for complex canopies is described. It is based on the combination of 3D models providing the information about the distribution of the elements of the canopy seen by the sensor, with transfer models computing the surface temperatures of the facets. The aggregation of radiances allows one to derive the directional temperature and the anisotropy by subtracting the nadir temperature. Two canopies are studied: a stand of maritime pine (in Landes de Gascogne, SW France) and a urban area (Toulouse city studied in the framework of the CAPITOUL experiment). For the forest canopy, a simplified 3D model concentrating all the foliage within cylinders is associated to a parametric model of hot spot which allows one to take into account the microscale effects related to needles and to their spatial distribution. The MuSICA model (developed at INRA) provides the temperatures of the crowns and herbaceous underneath layer at the ground. For the urban canopy, the SOLENE model (developed at CERMA, Nantes ) and the TEB model (developed at Météo France) are combined with the 3D model of Toulouse to simulate the TIR anisotropy both in daytime and nightime conditions. The simulations are compared against airborne measurements of anisotropy. For daytime conditions, the hot spot effects are satisfactorily reproduced with however a 15% underestimation, while the nightime directional anisotropy over the urban canopy is correctly simulated. The results are discussed and improvements proposed
Le, Guen Emilie. "Etude du procédé de soudage hybride laser/MAG : Caractérisation de la géométrie et de l'hydrodynamique du bain de fusion et développement d'un modèle 3D thermique." Phd thesis, Université de Bretagne Sud, 2010. http://tel.archives-ouvertes.fr/tel-00546986.
Bayareh, Mancilla Rafael. "Towards a Tool for Diabetic Foot Diagnosis using a 3D Modeling Based on Thermographic and Visible Spectrum Images." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0142.
Medical infrared thermography is a quantitative method for identifying irregular temperatures for medical diagnosis. Because abnormal body temperature is a natural sign of illness, this modality's data can be used to detect disease or physiological abnormalities, such as diabetic foot which is the subject of this thesis According to the International Diabetes Federation, nearly half a million people were diagnosed with diabetes mellitus in 2019. Peripheral neuropathy may affect 40 % to 60 % of individuals because of diabetic foot issues. Amputation below the knee joint as a preventive operation is a common risk among these individuals, and it is estimated that one amputation occurs every 30 seconds around the world. Currently, MRI, radiography, and thermography, together with image processing techniques, are among the medical imaging modalities utilized to diagnose the diabetic foot early. Medical infrared thermography, on the other hand, is a non-contact, non-invasive, and non-ionizing passive approach. Infrared imaging of the diabetic foot is still mostly reliant on 2D images that only show a portion of the anatomy. In this scenario, a 3D thermal model would allow for better observation and inspection of the region of interest, which includes the plantar, lateral, and dorsal areas. The use of 3D modeling for the diagnosis of the diabetic foot has been documented in a few articles at the publication of this thesis.The proposed method employs a series of merged infrared and visible spectrum images as data input for the 3D point cloud estimation and surface reconstruction, based on Structure from Motion and Multi-view Stereo methods. However, segmentation in thermal images is a task that remains manually performed since the detection of descriptive features is almost impossible in false-color images. Therefore, this thesis presents an automatic segmentation method based on the processing of radiometric information before generating a false-color image. Radiometric data processing is an alternative to digital image processing due to the feasibility to remove thermal interferences (e.g. lamp, thermal shadows, or even patient body parts) based on temperature threshold criteria, improving color contrast, and segmenting the region of interest, and combine onto visible spectrum images.The fused multimodal images were used as input information for the estimation of the 3D surface of the foot. The obtained model was provided with a temperature scale related to the radiometric data obtained by each volunteer, as well as the possibility to rotate the model to observe each viewpoint. The findings show that the 3D multimodal model is feasible, allowing for better and faster visualization of temperature distribution during diabetic foot diagnosis. The contribution of this thesis concerns the acquisition of a 3D model with thermal information and automatic segmentation in thermal images for multimodal fusion. The perspective is the clinical validation to pilot test the assistance in the diagnosis of diabetic foot. However, from the experimental/theoretical perspective, it is contemplated to study the accuracy of image registration with the proposed method of automatic segmentation, and the thermal and spatial accuracy of the 3D models carried out with phantoms
Bajard, Alban. "Numérisation 3D de surfaces métalliques spéculaires par imagerie infrarouge." Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00845939.