Littérature scientifique sur le sujet « Signals attenuation »
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Articles de revues sur le sujet "Signals attenuation"
Lysenko, Iu Iu, Yu V. Kuts, V. M. Uchanin et V. F. Petryk. « Research of oscillation mode in automated pulsed eddy current testing systems ». Information extraction and processing 2021, no 49 (17 décembre 2021) : 9–18. http://dx.doi.org/10.15407/vidbir2021.49.009.
Texte intégralMatsushima, Jun, Makoto Suzuki, Ippei Matsugi, Yoshibumi Kato et Shuichi Rokugawa. « Attenuation estimation using sweep signals in ultrasonic laboratory measurements ». GEOPHYSICS 79, no 3 (1 mai 2014) : V115—V130. http://dx.doi.org/10.1190/geo2013-0281.1.
Texte intégralHuang, Yaping, Hanyong Bao et Xuemei Qi. « Seismic Random Noise Attenuation Method Based on Variational Mode Decomposition and Correlation Coefficients ». Electronics 7, no 11 (28 octobre 2018) : 280. http://dx.doi.org/10.3390/electronics7110280.
Texte intégralWang, Xiang Hong, Hong Wei Hu et Zhi Yong Zhang. « Attenuation of Acoustic Emission Signals in Structural Interfaces ». Advanced Materials Research 569 (septembre 2012) : 343–46. http://dx.doi.org/10.4028/www.scientific.net/amr.569.343.
Texte intégralSalomonsson, Göran, et Benny Löfström. « Analysis of a System for Ultrasonic Imaging of Attenuation and Texture in Soft Tissue ». Ultrasonic Imaging 7, no 3 (juillet 1985) : 225–43. http://dx.doi.org/10.1177/016173468500700303.
Texte intégralKupchenko, L. F., A. S. Rybiak et А. V. Ponomar. « Compensation method for atmospheric attenuation of laser radiation in active electro-optical systems with dynamic spectral processing of optical signals ». Semiconductor Physics, Quantum Electronics and Optoelectronics 25, no 02 (30 juin 2022) : 211–18. http://dx.doi.org/10.15407/spqeo25.02.211.
Texte intégralZribi, Mehrez, Erwan Motte, Pascal Fanise et Walid Zouaoui. « Low-Cost GPS Receivers for the Monitoring of Sunflower Cover Dynamics ». Journal of Sensors 2017 (2017) : 1–9. http://dx.doi.org/10.1155/2017/6941739.
Texte intégralAbdorahimi, Danial, et Ali M. Sadeghioon. « Comparison of Radio Frequency Path Loss Models in Soil for Wireless Underground Sensor Networks ». Journal of Sensor and Actuator Networks 8, no 2 (22 juin 2019) : 35. http://dx.doi.org/10.3390/jsan8020035.
Texte intégralKoda, Yusuke, Koji Yamamoto, Takayuki Nishio et Masahiro Morikura. « Measurement Method of Temporal Attenuation by Human Body in Off-the-Shelf 60 GHz WLAN with HMM-Based Transmission State Estimation ». Wireless Communications and Mobile Computing 2018 (2018) : 1–9. http://dx.doi.org/10.1155/2018/7846936.
Texte intégralRODRÍGUEZ, O. C., S. JESUS, Y. STEPHAN, X. DEMOULIN, M. PORTER et E. COELHO. « NONLINEAR SOLITON INTERACTION WITH ACOUSTIC SIGNALS : FOCUSING EFFECTS ». Journal of Computational Acoustics 08, no 02 (juin 2000) : 347–63. http://dx.doi.org/10.1142/s0218396x0000025x.
Texte intégralThèses sur le sujet "Signals attenuation"
Smith, Patrick John. « Attenuation of volcanic seismic signals ». Thesis, University of Leeds, 2010. http://etheses.whiterose.ac.uk/1131/.
Texte intégralJohnston, Jerry W., et Steve LaPoint. « ROCKET MOTOR PLUME EFFECTS ON TM SIGNALS - MODEL CORROBORATION ». International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/607592.
Texte intégralThis paper presents the interim results of an effort to corroborate analytic model predictions of the effects of rocket motor plume on telemetry signal RF propagation. When space is available, telemetry receiving stations are purposely positioned to be outside the region of a rocket motor's plume interaction with the RF path; therefore, little historical data has been available to corroborate model predictions for specific rocket motor types and altitudes. RF signal strength data was collected during the flight of HERA target missile by White Sands Missile Range (WSMR) using a transportable telemetry receiving site specifically positioned to be within the rocket plume region of influence at intermediate altitudes. The collected data was analyzed and compared to an RF plume attenuation model developed for pre-mission predictions. This work was directed by the US Army Kwajalein Atoll (USAKA)/ Kwajalein Missile Range (KMR) Safety Division.
Doh, Yann. « Nouveaux modèles d'estimation monophone de distance et d'analyse parcimonieuse : Applications sur signaux transitoires et stationnaires bioacoustiques à l’échelle ». Thesis, Toulon, 2014. http://www.theses.fr/2014TOUL0020/document.
Texte intégralAcoustic waves show low dispersion due to the underwater propagation, compared to the propagation in the air. Some species of cetaceans communicate at long distance, others use their sound production for orientation. The goal of the scientic area called bioacoustics is to study animal species based on the analysis of their emitted sound. Their sounds can be used to detect, to classify and to locate the cetaceans. Recordings can be done with an passive acoustic array of multiple hydrophones, but this method is expensive and difficult to deploy. Thus, in order to scale this approach, we propose in this Phd thesis several original single hydrophone models to analyze these stationary or transient signals.Firstly, we provide a new theoretical model to estimate the distance between the impulsive source (ex. biosonar of the cetacean) and the hydrophone. Our model, the Intra Spectral ATtenuation (ISAT), is based on the spectral signal alteration due to the underwater acoustic propagation, especially the differences in different frequency bands. We also approximated ISAT by an artificial neural network. Both models are validated on clicks emitted by sperm whales (Physeter macrocephalus) recorded by our sonobuoy BOMBYX and our data-acquisition system DECAV developed incollaboration with the National Park of Port-Cros (France) and the Pelagos sanctuary for the protection of marine mammals in the Mediterranean sea (France). The error (RMSE) measures on the recordings of the NATO test center in the Bahamas are about500 meters, promising further real applications. Secondly, we worked on the variations of the cetacean vocalizations using the sparse coding method. The encoding of thecepstrums by unsupervised learning of a dictionary shows bigrammic time changes of the songs of humpback whales (Megaptera novaeangliae). We validate this model on signals recorded in the Ste Marie Channel (Madagascar) between 2008 and 2014, through our network of hydrophones BAOBAB which is the first passive acoustic array deployed in the Indian Ocean.Our models are part of the Saled Bioacoustics project (SABIOD, MI CNRS) and open perspectives for temporal and spatial scaling of bioacoustics
Maenou, Takatoshi, et Masaaki Katayama. « Study on Signal Attenuation Characteristics in Power Line Communications ». IEEE, 2006. http://hdl.handle.net/2237/7798.
Texte intégralDe, Villiers Wernich. « Prediction and measurement of power line carrier signal attenuation and fluctuation ». Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52410.
Texte intégralENGLISH ABSTRACT: A frequency domain Power Line Carrier (PLC) simulation program, with the ability to simulate signal attenuation including the coupling equipment, was developed. This simulation program was put to the test against the independent program of Professor L.M. Wedepohl and against practical field measurements. The predictions of the two programs were in precise agreement for a wide range of input parameters. Results from the field tests and predictions also showed close agreement. Further investigations, applying the simulation program, explained how ground conductors and soil resistivity influences PLC signal propagation. An experiment, which was developed to monitor PLC signal attenuation, was installed on the PLC system between Koeberg power station and Acacia substation, both near Cape Town. Data logged continuously over 28 days, indicated measurable and deterministic PLC signal attenuation variations with typical time constants of a few hours. Simulations of the PLC system indicated that the signal amplitude variations were influenced by changes in the height above the ground plane of the phase conductor. This significant finding creates the possibility to obtain real time knowledge of the sag of an Over Head Transmission Line (OHTL) by exploiting an operational PLC system. The knowledge about real time sag can be used in economical dynamic ampacity control systems. The practical and financial benefits to the electricity supply and distribution industry can be significant.
AFRIKAANSE OPSOMMING: 'n Frekwensie gebied "Power Line Carrier" (PLC) simulasie program wat die sein verswakking en die koppeling verliese kan naboots, is ontwikkel. Die program is getoets teen die onafhanklike program van Professor L.M. Wedepohl asook praktiese metings in die veld. Die vooruitskatings van beide programme is presies die selfde vir 'n wye reeks van parameters. Metings en nabootsings het ook noue ooreenstemming getoon. Verdere ondersoek, m. b. v. die program, is gedoen ten einde te verduidelik hoe grond-geleiers en grond weerstand die PLC sein se voortplanting beïnvloed. 'n Eksperiment om die PLC sein se verswakking mee te monitor is ontwerp. Die eksperiment was geïnstalleer in die PLC stelsel tussen Koeberg kernkragstasie en Acacia substasie, naby Kaapstad. Die eksperiment was vir 28 dae geaktiveer en die data wat die eksperiment opgelewer het toon meetbare PLC sein verswakking met tyd konstantes van 'n paar uur. Verdere nabootsings het gewys dat die veranderende verswakking in die PLC seinsterkte toegeskryf kan word aan die wisseling in hoogte van die fase geleiers bo die grondvlak. Hierdie bevinding is van besondere belang aangesien dit die moontlikheid oopmaak om die gemiddelde sak van kraglyne in reële tyd en onder bedryfs toestande te kan meet. Die informasie van die reële sak van kraglyne kan gebruik word in effektiewe stroomdrae-vermoë beheer stelsels. Die praktiese en finansiële voordele wat krag voorsieners en verspreiders hieruit kan put kan aansienlik wees.
Pokorný, Rostislav. « Návrh programovatelného útlumového členu ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413091.
Texte intégralViklund, Johan. « Atmospheric Attenuation for Lidar Systems in Adverse Weather Conditions ». Thesis, Umeå universitet, Institutionen för fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-184706.
Texte intégralWhite, John D. H. « A random signal ultrasonic test system for highly attenuating media ». Thesis, Keele University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315234.
Texte intégralPollard, Kimberley Jeanne. « Study of slant path attenuation ratios derived from a dual-polarized radar ». Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03122009-040448/.
Texte intégralSalchak, Iana. « Ingested Wireless Capsule Localisation Based on In-body RF Attenuation Path Loss ». Thesis, Griffith University, 2022. http://hdl.handle.net/10072/417699.
Texte intégralThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Eng & Built Env
Science, Environment, Engineering and Technology
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Livres sur le sujet "Signals attenuation"
Lamczyk, Mark Anthony. Experimental and numerical investigations of the Gaussian suppression of sound by sound. Monterey, Calif : Naval Postgraduate School, 1997.
Trouver le texte intégralR, Spilker Thomas, et United States. National Aeronautics and Space Administration., dir. Microwave resonator measurements of atmospheric absorption coefficients : A preliminary design study. Pasadena, Calif : National Aeronautics and Space Administration, Jet Propulsion Laborator[y], California Institute of Technology, 1995.
Trouver le texte intégralNational Institute of Standards and Technology (U.S.), dir. Electromagnetic signal attenuation in construction materials. Gaithersburg, Md : U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1997.
Trouver le texte intégralFaramaz, Davarian, Jet Propulsion Laboratory (U.S.) et Advanced Communications Technology Satellite (ACTS) Propagation Studies Workshop (7th : 1995 : Fort Collins, Colo.), dir. Proceedings of the nineteenth NASA Propagation Experimenters Meeting (NAPEX XIX) and the Advanced Communications Technology Satellite (ACTS) Propagation Studies Workshop (APSW VII) held in Fort Collins, Colorado, June 14-16, 1995. Pasadena, Calif : National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology, 1995.
Trouver le texte intégralCenter, NASA Glenn Research, dir. Acousto-ultrasonics to assess material and structural properties. [Cleveland, Ohio] : National Aeronautics and Space Administration, Glenn Research Center, 2002.
Trouver le texte intégralCenter, NASA Glenn Research, dir. Acousto-ultrasonics to assess material and structural properties. [Cleveland, Ohio] : National Aeronautics and Space Administration, Glenn Research Center, 2002.
Trouver le texte intégralCenter, NASA Glenn Research, dir. Acousto-ultrasonics to assess material and structural properties. [Cleveland, Ohio] : National Aeronautics and Space Administration, Glenn Research Center, 2002.
Trouver le texte intégralKaufmann, Philipp A., et Oliver Gaemperli. Hybrid Cardiac Imaging. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199392094.003.0028.
Texte intégralĢēģere, Lilita. Research on Next Generation Fiber Optical Amplifiers and Their Evaluation in Dense Communication Systems. RTU Press, 2021. http://dx.doi.org/10.7250/9789934226878.
Texte intégralAcousto-ultrasonics to assess material and structural properties. [Cleveland, Ohio] : National Aeronautics and Space Administration, Glenn Research Center, 2002.
Trouver le texte intégralChapitres de livres sur le sujet "Signals attenuation"
Becerra-Luna, B., R. Martínez-Memije, J. C. Sánchez et O. Infante. « Miokinetic Noise Attenuation in Photoplethysmographic Pulse Signals by LMS Adaptive Filtering with Adequacy of the Input Signals ». Dans VI Latin American Congress on Biomedical Engineering CLAIB 2014, Paraná, Argentina 29, 30 & ; 31 October 2014, 128–31. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13117-7_34.
Texte intégralBeura, Chandra Prakash, Michael Beltle et S. Tenbohlen. « Attenuation of UHF Signals in a 420 kV Power Transformer Based on Experiments and Simulation ». Dans Lecture Notes in Electrical Engineering, 1276–85. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31680-8_122.
Texte intégralWeik, Martin H. « signal attenuation ». Dans Computer Science and Communications Dictionary, 1577. Boston, MA : Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_17340.
Texte intégralPanetta, P. D., F. J. Margetan, I. Yalda et R. B. Thompson. « Observation and Interpretation of Microstructurally Induced Fluctuations of Back-Surface Signals and Ultrasonic Attenuation in Titanium Alloys ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 1547–54. Boston, MA : Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5947-4_202.
Texte intégralAl-Shuhail, Abdullatif, et Saleh Al-Dossary. « Denoising Using Signal Model ». Dans Attenuation of Incoherent Seismic Noise, 129–51. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32948-8_7.
Texte intégralKeiser, Gerd. « Optical Signal Attenuation and Dispersion ». Dans Fiber Optic Communications, 93–145. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4665-9_3.
Texte intégralMargetan, F. J., P. D. Panetta et R. B. Thompson. « Ultrasonic Signal Attenuation in Engine Titanium Alloys ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 1469–76. Boston, MA : Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5339-7_190.
Texte intégralPorcino, Domenico. « Analysis of UWB Signal Attenuation Through Typical Building Materials ». Dans Ultra-Wideband, 265–82. Chichester, UK : John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470056843.ch13.
Texte intégralYoon, Myung-Hyun, et Tenkasi V. Ramabadran. « Accounting for Ultrasonic Signal Attenuation Through Model Parameter Interpolation ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 767–74. Boston, MA : Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2848-7_97.
Texte intégralRovelli, Antonio, Sandro Marcucci et Giuliano Milana. « The Objective Determination of the Instantaneous Predominant Frequency of Seismic Signals and Inferences on Q of Coda Waves ». Dans Scattering and Attenuations of Seismic Waves, Part I, 281–93. Basel : Birkhäuser Basel, 1988. http://dx.doi.org/10.1007/978-3-0348-7722-0_15.
Texte intégralActes de conférences sur le sujet "Signals attenuation"
Zhao, Yumin, Yunyue Elita Li, Bei Li, Wei Luo, Zhaoyin Liu et Yuxuan Zhou. « Seismic attenuation extracted from isolated traffic signals ». Dans Second International Meeting for Applied Geoscience & Energy. Society of Exploration Geophysicists and American Association of Petroleum Geologists, 2022. http://dx.doi.org/10.1190/image2022-3746998.1.
Texte intégralLu, Yimin, Zhufeng Du et Tiexia Huang. « Attenuation characteristics of underwater target lidar signals ». Dans SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, sous la direction de Wallace G. Fishell, Arthur A. Andraitis, Michael S. Fagan, Jerry D. Greer et Mark C. Norton. SPIE, 1998. http://dx.doi.org/10.1117/12.330186.
Texte intégralShen, Yongna, Gongtian Shen, Pengcheng Gan, Junjiao Zhang et Yilin Yuan. « Research on the Attenuation Characteristics of Acoustic Emission From Corrosion of Tank Bottom Plate ». Dans ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-96869.
Texte intégralLopatin, M., N. Moskovitch, T. Trigano et Y. Sepulcre. « Pileup attenuation for spectroscopic signals using a sparse reconstruction ». Dans 2012 IEEE 27th Convention of Electrical & Electronics Engineers in Israel (IEEEI 2012). IEEE, 2012. http://dx.doi.org/10.1109/eeei.2012.6377045.
Texte intégralKikkert, Cornelis Jan, et Geoffrey Reid. « Radiation and attenuation of communication signals on power lines ». Dans Signal Processing (ICICS). IEEE, 2009. http://dx.doi.org/10.1109/icics.2009.5397568.
Texte intégralTimothy D Drysdale, Toby Trevor Mottram et David RS Cumming. « WSN : Modelling the Attenuation of Radio Signals by Bovines ». Dans 2008 Providence, Rhode Island, June 29 - July 2, 2008. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.24842.
Texte intégralBai, Wenling, Lilin Dan, Yue Xiao et Shaoqian Li. « Attenuation Factor Analysis for OFDM Signals with Peak Cancellation ». Dans 2009 IEEE 69th Vehicular Technology Conference Spring. IEEE, 2009. http://dx.doi.org/10.1109/vetecs.2009.5073408.
Texte intégralLi, Meng, et Zhonghua Huang. « Attenuation characteristic of UWB signals propagation in free space ». Dans International Symposium on Optoelectronic Technology and Application 2016, sous la direction de Bingheng Lu et Huaming Wang. SPIE, 2016. http://dx.doi.org/10.1117/12.2243759.
Texte intégralCarcreff, Ewen, Sébastien Bourguignon, Jéro^me Idier, Laurent Simon et Aroune Duclos. « Including frequency-dependent attenuation for the deconvolution of ultrasonic signals ». Dans ICA 2013 Montreal. ASA, 2013. http://dx.doi.org/10.1121/1.4800850.
Texte intégralNazari, A., M. A. Riahi et N. Abbasi. « The Influence of Attenuation on Frequency Component of Seismic Signals ». Dans KazGeo 2012. Netherlands : EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20142944.
Texte intégralRapports d'organisations sur le sujet "Signals attenuation"
Becquet, Yann, D. G. Camell, Galen H. Koepke, Kate A. Remley, William F. Young et Christopher L. Holloway. Attenuation of radio wave signals coupled into twelve large building structures. Gaithersburg, MD : National Bureau of Standards, 2008. http://dx.doi.org/10.6028/nist.tn.1545.
Texte intégralBrown Horowitz, Sigal, Eric L. Davis et Axel Elling. Dissecting interactions between root-knot nematode effectors and lipid signaling involved in plant defense. United States Department of Agriculture, janvier 2014. http://dx.doi.org/10.32747/2014.7598167.bard.
Texte intégralTaylor, Oliver-Denzil, Amy Cunningham,, Robert Walker, Mihan McKenna, Kathryn Martin et Pamela Kinnebrew. The behaviour of near-surface soils through ultrasonic near-surface inundation testing. Engineer Research and Development Center (U.S.), septembre 2021. http://dx.doi.org/10.21079/11681/41826.
Texte intégralBrown, C. T., V. G. McDonnell et D. G. Talley. Accounting for Laser Extinction, Signal Attenuation, and Secondary Emission While Performing Optical Patternation in a Single Plane. Fort Belvoir, VA : Defense Technical Information Center, janvier 2002. http://dx.doi.org/10.21236/ada410872.
Texte intégralFarahbod, A. M., et J. F. Cassidy. An overview of seismic attenuation in the Northern Appalachians Seismic Zone, New Brunswick and Nova Scotia. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329702.
Texte intégralFarahbod, A. M., et J. F. Cassidy. An overview of seismic attenuation in the Eastern Canadian Arctic and the Hudson Bay Complex, Manitoba, Newfoundland and Labrador, Nunavut, Ontario, and Quebec. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330396.
Texte intégralRon, Eliora, et Eugene Eugene Nester. Global functional genomics of plant cell transformation by agrobacterium. United States Department of Agriculture, mars 2009. http://dx.doi.org/10.32747/2009.7695860.bard.
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