Littérature scientifique sur le sujet « Radar penetrante »
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Articles de revues sur le sujet "Radar penetrante"
Ucha, J. M., M. Botelho, G. S. Vilas Boas, L. P. Ribeiro et P. S. Santana. « Uso do radar penetrante no solo (GPR) na investigação dos solos dos tabuleiros costeiros no litoral norte do estado da Bahia ». Revista Brasileira de Ciência do Solo 26, no 2 (juin 2002) : 373–80. http://dx.doi.org/10.1590/s0100-06832002000200011.
Texte intégralKılıç, Alper, İsmail Babaoğlu, Ahmet Babalık et Ahmet Arslan. « Through-Wall Radar Classification of Human Posture Using Convolutional Neural Networks ». International Journal of Antennas and Propagation 2019 (31 mars 2019) : 1–10. http://dx.doi.org/10.1155/2019/7541814.
Texte intégralShumeyko, A. E., et M. L. Yaskevich. « Ground penetrate radar test of a difficult nonhomogeneous stores ». Environmental Protection in Oil and Gas Complex, no 5 (2019) : 42–50. http://dx.doi.org/10.33285/2411-7013-2019-5(290)-42-50.
Texte intégralXu, Qiangqiang, Jianquan Ge et Tao Yang. « Optimal Design of Cooperative Penetration Trajectories for Multiaircraft ». International Journal of Aerospace Engineering 2020 (25 janvier 2020) : 1–12. http://dx.doi.org/10.1155/2020/8490531.
Texte intégralEl Hajj, Mohammad, Nicolas Baghdadi, Hassan Bazzi et Mehrez Zribi. « Penetration Analysis of SAR Signals in the C and L Bands for Wheat, Maize, and Grasslands ». Remote Sensing 11, no 1 (26 décembre 2018) : 31. http://dx.doi.org/10.3390/rs11010031.
Texte intégralBecker, K. F., L. Georgi, R. Kahle, S. Voges, F. Brandenburger, J. Höfer, C. Ehrhardt et al. « Heterogeneous integration of a miniaturized W-band radar module ». International Symposium on Microelectronics 2015, no 1 (1 octobre 2015) : 000766–70. http://dx.doi.org/10.4071/isom-2015-thp11.
Texte intégralHargrave, Chad, Lance Munday, Gareth Kennedy et André de Kock. « Mine Machine Radar Sensor for Emergency Escape ». Resources 9, no 2 (4 février 2020) : 16. http://dx.doi.org/10.3390/resources9020016.
Texte intégralJofre, L., A. Broquetas, J. Romeu, S. Blanch, A. P. Toda, X. Fabregas et A. Cardama. « UWB Tomographic Radar Imaging of Penetrable and Impenetrable Objects ». Proceedings of the IEEE 97, no 2 (février 2009) : 451–64. http://dx.doi.org/10.1109/jproc.2008.2008854.
Texte intégralHu, Xiaoyu, Jinming Ge, Jiajing Du, Qinghao Li, Jianping Huang et Qiang Fu. « A robust low-level cloud and clutter discrimination method for ground-based millimeter-wavelength cloud radar ». Atmospheric Measurement Techniques 14, no 2 (3 mars 2021) : 1743–59. http://dx.doi.org/10.5194/amt-14-1743-2021.
Texte intégralNag, S., et L. Peters. « Radar images of penetrable targets generated from ramp profile functions ». IEEE Transactions on Antennas and Propagation 49, no 1 (2001) : 32–40. http://dx.doi.org/10.1109/8.910526.
Texte intégralThèses sur le sujet "Radar penetrante"
Oliveira, J?nior Josibel Gomes de. « Dois testes de imageamento com GPR em problemas de controle ambiental em regi?es tropicais : migra??o de dunas e localiza??o de dutos de ?leo enterrados ». Universidade Federal do Rio Grande do Norte, 2001. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18778.
Texte intégralBecause the penetration depth of Ground Penetrating Radar (GPR) signals is very limited in high conductive soils, the usefullness of this method in tropical regions is not yet completly known. The main objective of this researh is to test the usefullness of the method in Brazil. Two typical problems where GPR has been used in Europe and North American were choosed for this test: the first one is to characterize the internal structures of a sand body and the second problem is the localization of old buried pipes lines. The first test was done near the city of S?o Bento do Norte, in the northern coast of Rio Grande do Norte state, NE Brazil. In this region, there is a sand dune that is migrating very fast in the direction of adjacent settling areas. To characterize the internal structure of the dune and its relationship to the prevailing wind direction, as a preliminary step to understand the dune migration, GPR profiles using the 400 MHz frequency were performed in E-W, N-S, NE-SW, and SE-NW directions over the sand dune intersecting at the top of the dune. The practical resolution of the GPR data is around 30 cm; this was sufficient to distinguish individual foresets inside the dune. After applying the elevation correction to the data, we identified that dips of bedding structures are smallest for the N-S profile, which is perpendicular to the dominant wind direction, largest for the E-W profile, and intermediate for the SW-NE and SE-NW profiles. Foresets in the E-W profile dip with angles varying from 2 to 6 degrees. In the E-W profile, the water table and a horizontal truncation interface separating two generations of dunes were identified, as well as an abrupt directional change in the foreset patterns associated to a lateral contact between two dune generations, the older one extending to the west. The used high frequency of 400 Mhz does not allow a penetration deep enough to map completely these internal contacts. The second test was done near Estreito, a small town near Carna?bais city, also in Rio Grande do Norte state. In this locality, there are several old pipe lines buried in area covered by plantations where digging should be minimized. Several GPR profiles using the 400 and 200 MHz frequency were performed trying to intercept perpendicularly the possible pipe lines. Because of the high conductivity of the soil, the raw original data can hardly be use to identify the pipe lines. However, after an adequate processing over the 200 MHz profiles, six pipe lines were identified. As a global result of the tests, GPR can be very usefull if the conductivity of the ground is low or, in the case of medium conductivities of the soils, if adequate processing is performed
O principal objetivo deste trabalho, ? testar o m?todo GPR (Ground Penetrating Radar) em ambientes com clima tropical. Desta forma, foram escolhidas duas localidades distintas que apresentam problemas considerados padr?es para a aplica??o do GPR. A natureza n?o invasiva deste m?todo, aliada ao baixo custo, rapidez e facilidade de opera??o, torna-o adequado para os trabalhos aqui propostos. A primeira localidade est? situada no munic?pio de S?o Bento do Norte e o problema relacionado a ela consiste na caracteriza??o de estruturas internas de dunas. Se??es de GPR com antena de 400 Mhz foram levantadas nas dire??es E-W, N-S, NE-SW e SE-NW. Estes perfis interceptaram-se no topo da duna e possibilitaram estabelecer rela??es entre a sua estrutura interna e a sua dire??o de migra??o, associada ao vento dominante na ?rea. Foi poss?vel identificar tamb?m contatos laterais entre dunas de diferentes gera??es, assim como bounding surfaces, n?vel fre?tico e mergulho de camadas. Na segunda localidade, de nome Estreito (pr?ximo ao munic?pio de Carnaubais), foram levantadas se??es de GPR com antenas de 200 Mhz e 400 Mhz para detectar dutos antigos de petr?leo enterrados em uma ?rea agricult?vel. Os perfis de GPR foram realizados perpendicularmente ? suposta dire??o dos dutos e, da sua interpreta??o, determinous-se a posi??o de seis oleodutos de diferentes di?metros (4", 10" e 16") enterrados, cujas posi??es exatas eram desconhecidas, assim como a produndidade em que estes se encontravam (variando de 1,2m e 1,5m). No tratamento dos dados foi adotado um processsamento semelhante ?queles utilizado nos m?todos s?smicos (ajuste do tempo zero, ganho, migra??o, corre??o topogr?fica, dewow, deconvolu??o e filtros passa-banda). Este processamento permitiu estabelecer rela??es entre os refletores contidos nas se??es de GPR e estruturas geol?gicas (ou n?o) presentes nos ambientes. A corre??o topogr?fica possibilitou identificar com precis?o estruturas planas (como o n?vel fre?tico), ao passo que a migra??o dos dados proporcionou a exata posi??o dos dutos
Thunberg, Billy, et Kalle Kurttio. « Radardetektering av stålämnen med hjälp av UWB-radar ». Thesis, Högskolan i Gävle, Elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22538.
Texte intégralThe steel industries Sandvik, Sandviken and SSAB, Borlänge, produces billets (quadratic,long steel units). Billets travelling through the furnace will heat up. At the end of the furnace,the billets will require precision measurements regarding its position, due to the extractingdevice. Sensors that are used today require an unobstructed view, which is achieved by holesin the furnace walls. Maintenance is needed in order to ensure that no impurities are cloggingthe holes. The goal with this thesis is to investigate whether it is possible to detect rectangular billets byusing an UWB-radar system. The broadband characteristics of an UWB-unit makes it asuitable successor, as free sight is not a requirement. This will decrease downtown due tomaintenance and optimize the time required for billets extraction.This involves economic and environmental aspects as well, due to lower energy consumption. This will be tested by collecting radar measurements for further signal processing. The usedradar system is forward scattering radar. The work started with a theoretical study aboutUWB-technique and basics about radar. Thereafter test scenarios were designed to study howthe radar wave is affected by changing environments. The resulting measurements were latersignal processed in Matlab. This work shows that it is possible to detect billets with various dimensions, using UWBradar.The algorithm can also be used as a passage alarm, which can be used in other areasthan furnaces.
PAPI, FEDERICO. « Sviluppo di un Prototipo Radar Penetrante SF-CW ad Altissima Risoluzione ». Doctoral thesis, 2016. http://hdl.handle.net/2158/1025123.
Texte intégralWang, Wen-Yu, et 王文郁. « Signal classification of Ground Penetrate Radar using neural network analyses ». Thesis, 2006. http://ndltd.ncl.edu.tw/handle/n2jgm5.
Texte intégral朝陽科技大學
營建工程系碩士班
94
The investigation of underground pipelines is very important prior the excavation project. Such investigation is usually based on the official record in the highway department. Accidents and sometimes disputes over the destruction of underground pipelines arise often due to false or incomplete information in the official record. Ground penetration radar, or GPR, may be very helpful to investigate underground pipelines. The objective of current study is to improve the detection of underground pipelines based on the GPR signals. Sample signals are obtained in the laboratory tests with a mockup of flexible pavement and a tube. The depth and type of the tube is varied. The collected signals are analyzed using artificial neural networks. The trained neural networks are then applied to GPR signals from the field tests. The initial results are promising.
Chapitres de livres sur le sujet "Radar penetrante"
Liang, Hongyu, Wenbin Xu, Xiaoli Ding, Lei Zhang et Songbo Wu. « Urban Sensing with Spaceborne Interferometric Synthetic Aperture Radar ». Dans Urban Informatics, 345–65. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8983-6_21.
Texte intégralS., Kannadhasan, Kanagaraj Venusamy et Nagarajan R. « Recent Trends in Internet of Medical Things ». Dans Advances in Medical Technologies and Clinical Practice, 39–47. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-5741-2.ch003.
Texte intégralDuLong, Jessica. « “It was like breathing dirt.” ». Dans Saved at the Seawall, 71–85. Cornell University Press, 2021. http://dx.doi.org/10.7591/cornell/9781501759123.003.0005.
Texte intégralSmith, Anne M. « Active Microwave Systems for Monitoring Drought Stress ». Dans Monitoring and Predicting Agricultural Drought. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195162349.003.0015.
Texte intégralActes de conférences sur le sujet "Radar penetrante"
Sainath, Kamalesh, Fernando L. Teixeira et Scott Hensley. « Interferometric SAR coherence arising from the vertically-polarized electromagnetic interrogation of layered, penetrable dielectric media ». Dans 2015 European Radar Conference (EuRAD). IEEE, 2015. http://dx.doi.org/10.1109/eurad.2015.7346223.
Texte intégralLinlin Lei, Sixin Liu, Lei Fu, Xu Meng et Junjun Wu. « Examples of pre-stack reverse-time migration applied to ground penetrate radar synthetic data ». Dans 15th International Conference on Ground-Penetrating Radar (GPR) 2014. IEEE, 2014. http://dx.doi.org/10.1109/icgpr.2014.6970501.
Texte intégralSang-Wook Kim, Jong-Sung Choi et Se-Yun Kim. « Distortion of pulse signatures penetrated obliquely through tunnel in a cross-borehole pulse radar ». Dans 2012 14th International Conference on Ground Penetrating Radar (GPR). IEEE, 2012. http://dx.doi.org/10.1109/icgpr.2012.6254989.
Texte intégralSong, Yihao, et Yanfeng Shen. « Steerable Unidirectional Wave Emission From a Single Piezoelectric Transducer Using a Shape Memory Alloy Composite Metasurface ». Dans ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23460.
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