Littérature scientifique sur le sujet « Modulation angulaire »
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Articles de revues sur le sujet "Modulation angulaire"
Bertho, A., M. Dos Santos, A. François et F. Milliat. « Histoire de la prise en charge des cancers bronchopulmonaires non à petites cellules de stade précoce : de la chirurgie à la radiothérapie stéréotaxique ». Radioprotection 55, no 3 (20 mai 2020) : 165–72. http://dx.doi.org/10.1051/radiopro/2020050.
Texte intégralWang, Huan, Jiajun Linghu, Xuezhi Wang, Qiyi Zhao et Hao Shen. « Angular-Dependent THz Modulator with Hybrid Metal-Graphene Metastructures ». Nanomaterials 13, no 13 (23 juin 2023) : 1914. http://dx.doi.org/10.3390/nano13131914.
Texte intégralLiu, Peijun, Yanan Fu, Xi Xie, Changjun Min, Yuquan Zhang et Xiaocong Yuan. « High-efficiency monolayer metallic metasurface for modulation of orbital angular momentum ». Chinese Optics Letters 20, no 12 (2022) : 123601. http://dx.doi.org/10.3788/col202220.123601.
Texte intégralHuang Xianming, 黄先明, 王飞 Wang Fei, 陆宝乐 Lu Baole et 白晋涛 Bai Jintao. « 基于轨道角动量交换实现巨克尔非线性效应调控 ». Acta Optica Sinica 42, no 22 (2022) : 2219002. http://dx.doi.org/10.3788/aos202242.2219002.
Texte intégralWang, Jian, Jun Liu, Shuhui Li, Yifan Zhao, Jing Du et Long Zhu. « Orbital angular momentum and beyond in free-space optical communications ». Nanophotonics 11, no 4 (14 décembre 2021) : 645–80. http://dx.doi.org/10.1515/nanoph-2021-0527.
Texte intégralLiu, Jun, Shuang Zheng, Shi Chen, Long Zhu, Shimao Li, Shengqian Gao, Heyun Tan, Xinlun Cai et Jian Wang. « High-speed spatial light modulation based on photon dimension mapping assisted by an integrated mode multiplexer ». Applied Physics Letters 120, no 13 (28 mars 2022) : 131103. http://dx.doi.org/10.1063/5.0076652.
Texte intégralBuzzelli, A., P. de Bernardis, S. Masi, N. Vittorio et G. de Gasperis. « Optimal strategy for polarization modulation in the LSPE-SWIPE experiment ». Astronomy & ; Astrophysics 609 (janvier 2018) : A52. http://dx.doi.org/10.1051/0004-6361/201730754.
Texte intégralBelousov, Igor, Veniamin Samoseiko et Alecsandr Saushev. « Assessment of filtering properties of asynchronous electric drive with pulse width modulation ». E3S Web of Conferences 363 (2022) : 01025. http://dx.doi.org/10.1051/e3sconf/202236301025.
Texte intégralZhang, Chenming, Jie Li, Xiaoqiao Yuan, Xi Zhang, Xiaokai Wei, Kaiqiang Feng, Chenjun Hu, Debiao Zhang et Yubing Jiao. « Optimal Rotational Angular Velocity Determination Method Based on Compound Rotary Semi-Strapdown Inertial Navigation System ». Sensors 22, no 12 (17 juin 2022) : 4583. http://dx.doi.org/10.3390/s22124583.
Texte intégralKushiro, Keisuke, Mingjia Dai, Mikhail Kunin, Sergei B. Yakushin, Bernard Cohen et Theodore Raphan. « Compensatory and Orienting Eye Movements Induced By Off-Vertical Axis Rotation (OVAR) in Monkeys ». Journal of Neurophysiology 88, no 5 (1 novembre 2002) : 2445–62. http://dx.doi.org/10.1152/jn.00197.222.
Texte intégralThèses sur le sujet "Modulation angulaire"
Javahiraly, Nicolas. « Méthode d'analyse optique du module de rigidité. Application à un capteurs photonique de position angulaire et de couple à modulation d'amplitude et de polarisation ». Université Louis Pasteur (Strasbourg) (1971-2008), 2002. http://www.theses.fr/2002STR13092.
Texte intégralWe propose the principle, the concept and the technological development of two types of sensors: on fiber optic angular position sensor based on the modes coupling and a photonic torque sensor based on the polarization modulation. After a state of art concerning the torque and the angular sensor, we analyze the light propagation in the fiber optic in an electromagnetic and opto-geometrical way applicable to the sensor. We have analyzed the theoretical and the experimental responses of the sensors as a function of the material nature and its geometry. We obtained experimentally, for the torque sensor, a sensitivity between 2,233. 10-3 and 1,067 ʿ/N. M and a stiffness between 5,91 and 448,01 N. M/ʿ. The comparison between the theoretical and the experimental results gives a maximum difference between 1,68% and 3,4%. We have tested the Temperature fluctuations influence for DT=130ʿC and the results gave 7% of difference with the theory. By using an experimental set up to obtain a reference signal, we obtained a 0,59% maximum difference for the sensitivity and the stiffness. So, we minimize the source fluctuations with this reference set up
Keller, Niels. « Étude angulaire du deuxième champ critique dans les supraconducteurs à fermions lourds UPt3, URu2Si2 et CeCu2Si2 ». Université Joseph Fourier (Grenoble ; 1971-2015), 1994. http://www.theses.fr/1994GRE10119.
Texte intégralFourati, Aroua. « Modélisation électro-magnéto-mécanique d'une machine asynchrone sous approche angulaire : Application au diagnostic des défauts de roulements en régime non stationnaire ». Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI078.
Texte intégralIn an induction machine, the diagnosis of defects by analysis of the electrical current signal requires knowledge of the dynamic behavior of the machine. In addition to external excitation sources, the behavior of the motor is governed by a set of periodic phenomena related to its angularly periodic geometry and coupled by their multiphysical character. In the presence of a bearing defect, measurable quantities will have components at its characteristic frequency combined with the characteristic frequencies of the engine. The understanding of interactions, in particular modulation, requires the implementation of numerical models that represent the manifestations of coupled phenomena. This thesis work proposes an electro-magneto-mechanical model of a squirrel-cage induction machine coupled to a rolling bearing model in an original writing frame called "Angular Approaches". By keeping the "Angle-Time" relation in modeling, it is possible to easily extend the modeling to non-stationary operating conditions and to introduce a strong coupling between the mechanical and electromagnetic models. Thus, it is shown that the instantaneous angular speed is the quantity which ensures the transmission of the localized mechanical defect to the electrical quantities. The proposed model thus offers a decryption of the modulation phenomena present on the transfer path and described by the couplings of cyclic dynamic behaviors (permeance network, loading of the rolling elements, etc.) and / or periodic (structural resonances, electrical resonance, etc.). This work opens the way for a better understanding of the multiphysical coupled behaviors of an electrical machine to better specify the monitoring tools to be used. Further developments can now be directed to a complexity of models or to the exploitation of fine dynamic behaviors in a non-steady operating conditions
Ernould, Clément. « Développement et application d’une méthode à haute résolution angulaire pour la mesure des gradients d’orientation et des déformations élastiques par microscopie électronique à balayage ». Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0225.
Texte intégralUnderstanding the deformation mechanisms in crystalline materials requires a fine characterization of microstructures. The precise measurement of lattice rotations and elastic strains in the scanning electron microscope is the aim of the so-called high-angular resolution methods. For this purpose, digital image correlation techniques are used in order to register electron diffraction patterns. In this thesis, an original registration approach is proposed. The displacement field across the whole scintillator is modelled by a linear homography. Such a shape function is often met is the field of computer vision to describe projective transformations. The homography between two patterns is measured from a single and large region of interest using a numerically efficient inverse-compositional Gauss-Newton algorithm. It integrates a correction of optical distortions caused by camera lenses and its convergence is ensured by a pre-alignment step of the patterns. The latter relies on global cross-correlation algorithms based on Fourier-Mellin and Fourier transforms. It fairly accounts for rotations up to approximately ten degrees with an accuracy typically between 0.1 and 0.5°. The homography is measured independently from the projection geometry, which is only considered afterwards to analytically deduce the rotations and elastic strains. The proposed method is validated numerically from simulated and optically distorted patterns showing disorientations up to 14° in the presence of elastic strains up to 5×10⁻². The accurate measurement of elastic strains between 1×10⁻⁴ and 2×10⁻³ requires a correction of radial distortion effects, even when the disorientation angle is small. Finally, the method is applied to patterns acquired by means of electron backscatter diffraction (EBSD) and in transmission using the new on-axis transmission Kikuchi diffraction (TKD) configuration. Plastically deformed polycrystalline metals as well as semiconductors are characterized. The method highlights fine details of the microstructure of a quenched and tempered martensitic steel and of an interstitial free steel deformed by 15% in tension, although plastic deformation deteriorates the diffraction contrast. The deformation structures in a nanostructured aluminium obtained by severe plastic deformation are also analysed by coupling the image registration method to the on-axis TKD configuration. This coupling allows a high spatial resolution (3 to 10 nm) and a high angular resolution (0.01 to 0.05°) to be reached simultaneously. Elastic strain maps are obtained at the nanoscale in a SiGe thin foil. The geometrically necessary dislocation densities in a GaN single crystal are mapped with a resolution of about 2.5×10⁻³ µm⁻¹ (i.e. 8×10¹² m⁻²)
Klein, Maren. « Modulation phonologischer und semantischer Prozesse im Sprachnetzwerk : Eine kombinierte TMS-fMRT-Studie ». Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-165709.
Texte intégralVitullo, Dashiell. « Propagation of Photons through Optical Fiber : Spin-Orbit Interaction and Nonlinear Phase Modulation ». Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20708.
Texte intégralMcLaren, Melanie. « Tailoring quantum entanglement of orbital angular momentum ». Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95868.
Texte intégralENGLISH ABSTRACT: High-dimensional quantum entanglement offers an increase in information capacity per photon; a highly desirable property for quantum information processes such as quantum communication, computation and teleportation. As the orbital angular momentum (OAM) modes of light span an infinite-dimensional Hilbert space, they have become frontrunners in achieving entanglement in higher dimensions. In light of this, we investigate the potential of OAM entanglement of photons by controlling the parameters in both the generation and measurement systems. We show the experimental procedures and apparatus involved in generating and measuring entangled photons in two-dimensions. We verify important quantum tests such as the Einstein, Podolsky and Rosen (EPR) paradox using OAM and angle correlations, as well as a violation of a Bell-type inequality. By performing a full state tomography, we characterise our quantum state and show we have a pure, highly entangled quantum state. We demonstrate that this method can be extended to higher dimensions. The experimental techniques used to generate and measure OAM entanglement place an upper bound on the number of accessible OAM modes. As such, we investigate new methods in which to increase the spiral bandwidth of our generated quantum state. We alter the shape of the pump beam in spontaneous parametric down-conversion and demonstrate an effect on both OAM and angle correlations. We also made changes to the measurement scheme by projecting the photon pairs into the Bessel-Gaussian (BG) basis and demonstrate entanglement in this basis. We show that this method allows the measured spiral bandwidth to be optimised by simply varying the continuous radial parameter of the BG modes. We demonstrate that BG modes can be entangled in higher dimensions compared with the commonly used helical modes by calculating and comparing the linear entropy and fidelity for both modes. We also show that quantum entanglement can be accurately simulated using classical light using back-projection, which allows the study of projective measurements and predicts the strength of the coincidence correlations in an entanglement experiment. Finally, we make use of each of the techniques to demonstrate the effect of a perturbation on OAM entanglement measured in the BG basis. We investigate the self-healing property of BG beams and show that the classical property is translated to the quantum regime. By calculating the concurrence, we see that measured entanglement recovers after encountering an obstruction.
AFRIKAANSE OPSOMMING: Hoë-dimensionele kwantumverstrengeldheid bied ’n toename in inligtingskapasiteit per foton. Hierdie is ’n hoogs wenslike eienskap vir kwantum inligting prosesse soos kwantum kommunikasie, berekening en teleportasie. Omdat die orbitale hoekmomentum (OAM) modusse van lig ’n oneindig dimensionele Hilbertruimte beslaan, het dit voorlopers geword in die verkryging van verstrengeling in hoër dimensies. In die lig hiervan, ondersoek ons die potensiaal van OAM verstrengeling van fotone deur die parameters in beide die generering en meting stelsels te beheer. Ons toon die eksperimentele prosedures en apparaat wat betrokke is by die generering en die meet van verstrengelde fotone in twee dimensies. Ons verifieer kwantumtoetse, soos die Einstein, Podolsky en Rosen (EPR) paradoks vir OAM en die hoekkorrelasies, sowel as ’n skending van ’n Bell-tipe ongelykheid. Deur middel van ’n volledige toestand tomografie, karakteriseer ons die kwantum toestand en wys ons dat dit ’n suiwer, hoogs verstrengel kwantum toestand is. Ons toon ook dat hierdie metode uitgebrei kan word na hoër dimensies. Die eksperimentele tegnieke wat tydens die generasie en meet van OAM verstrengeling gebruik is, plaas ’n bogrens op die aantal toeganklik OAM modusse. Dus ondersoek ons nuwe metodes om die spiraal bandwydte van ons gegenereerde kwantum toestand te verhoog. Ons verander die vorm van die pomp bundel in spontane parametriese af-omskakeling en demonstreer die uitwerking daarvan op beide OAM en die hoekkorrelasies. Ons het ook veranderinge aan die meting skema gemaak deur die foton pare op die Bessel-Gauss (BG) basis te projekteer. Ons wys dat hierdie metode die gemeetde spiraal bandwydte kan optimeer deur eenvoudig die kontinue radiale parameter van die BG modes te verander. Ons demonstreer dat BG modusse verstrengel kan word in hoër dimensies as die heliese modusse, wat algemeen gebruik word, deur berekeninge te maak en te vergelyk met lineêre entropie en vir beide modusse. Ons wys ook dat kwantumverstrengling akkuraat nageboots kan word, met behulp van die klassieke lig terug-projeksie, wat die studie van projeksie metings toelaat en voorspel die krag van die saamval korrelasies in ’n verstrengeling eksperiment. Ten slotte, gebruik ons elk van die tegnieke om die effek van ’n storing op OAM verstrengling wat in die BG basis gemeet is, te demonstreer. Ons ondersoek die self-genesingseienskap van BG bundels en wys dat die klassieke eienskap vertaal na die kwantum-gebied. Deur die berekening van die konkurrensie (concurrence), sien ons dat die gemeetde verstrengeling herstel word nadat ’n obstruksie ondervind is.
Chu, Jiaqi. « Orbital angular momentum encoding/decoding of 2D images for scalable multiview colour displays ». Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274903.
Texte intégralMaurer, Michael [Verfasser], et Yiannos [Akademischer Betreuer] Manoli. « System dimensioning, digital postprocessing, and nonideality control for electromechanical Delta-Sigma-Modulator based Angular Rate Detection ». Freiburg : Universität, 2018. http://d-nb.info/1167159624/34.
Texte intégralMmbaga, Paul Fahamuel. « Study, analysis and application of optical OFDM, Single Carrier (SC) and MIMO in Intensity Modulation Direct Detection (IM/DD) ». Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15952.
Texte intégralLivres sur le sujet "Modulation angulaire"
1957-, Goupil M. J., Hansen Carl J et United States. National Aeronautics and Space Administration., dir. On the role of resonances in nonradial pulsators. [Washington, DC : National Aeronautics and Space Administration, 1997.
Trouver le texte intégralChapitres de livres sur le sujet "Modulation angulaire"
Stevens, Peter M. « Growth Modulation for Angular and Length Correction ». Dans Pediatric Lower Limb Deformities, 51–66. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17097-8_4.
Texte intégralRedžić, M., A. Beganović, L. Čiva, R. Jašić, A. Skopljak-Beganović et S. Vegar-Zubović. « Quality control of angular tube current modulation ». Dans IFMBE Proceedings, 563–67. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4166-2_85.
Texte intégralGross, Richard S., Steven L. Marcus et Jean O. Dickey. « Modulation of the Seasonal Cycle in Length-of-Day and Atmospheric Angular Momentum ». Dans International Association of Geodesy Symposia, 457–62. Berlin, Heidelberg : Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04709-5_76.
Texte intégralDjordjevic, Ivan B., et Zhen Qu. « Coded Orbital Angular Momentum Modulation and Multiplexing Enabling Ultra-High-Speed Free-Space Optical Transmission ». Dans Optical Wireless Communications, 363–85. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30201-0_16.
Texte intégralActes de conférences sur le sujet "Modulation angulaire"
Hodgkinson, Ian, Qi hong Wu et Adrian McPhun. « Rugate filters with spatially-modulated nanostructures ». Dans Optical Interference Coatings. Washington, D.C. : Optica Publishing Group, 1997. http://dx.doi.org/10.1364/oic.1998.fb.3.
Texte intégralSabet, Arash A., Eftyxios Christoforou, Benjamin Zatlin, Guy M. Genin et Philip V. Bayly. « Deformation of the Human Brain Induced by Mild Angular Acceleration ». Dans ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-175638.
Texte intégralSison, Miguel, et Sophie Brasselet. « Real-time imaging of molecular organization by point scanning nonlinear fast polarization modulation ». Dans Polarized light and Optical Angular Momentum for biomedical diagnostics, sous la direction de Jessica C. Ramella-Roman, Hui Ma, I. Alex Vitkin, Daniel S. Elson et Tatiana Novikova. SPIE, 2021. http://dx.doi.org/10.1117/12.2578547.
Texte intégralZotov, Sergei A., Igor P. Prikhodko, Alexander A. Trusov et Andrei M. Shkel. « Frequency modulation based angular rate sensor ». Dans 2011 IEEE 24th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2011. http://dx.doi.org/10.1109/memsys.2011.5734490.
Texte intégralVicuña-Hernández, Verónica, Lorenzo Marrucci et Bruno Piccirillo. « Orbital angular momentum broadening in Poincaré beams ». Dans Frontiers in Optics. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/fio.2022.jw4a.1.
Texte intégralChen, Yanzi, Jin Jiang, Zeming Hu, Kun Yang, Chenhong Zhou et Zhengrong Lai. « Trellis Coded Modulation with Orbital Angular Momentum ». Dans 2021 IEEE 6th International Conference on Signal and Image Processing (ICSIP). IEEE, 2021. http://dx.doi.org/10.1109/icsip52628.2021.9688600.
Texte intégralAghion, Cristian, Ovidiu Ursaru, Mihai Lucanu, Laurentiu Dimitriu et Liliana Vornicu. « Software Control for PWMA (Angular Pulse Width Modulation) ». Dans 2007 International Symposium on Signals, Circuits and Systems. IEEE, 2007. http://dx.doi.org/10.1109/isscs.2007.4292754.
Texte intégralDjordjevic, Ivan B. « Orbital angular momentum modulation for fiber-optics communication ». Dans 2012 Opto-Electronics and Communications Conference (OECC). IEEE, 2012. http://dx.doi.org/10.1109/oecc.2012.6276613.
Texte intégralHao, Yanling, Bo Liu, Chunyang Yu et Guangtao Zhou. « Micromachined angular rate sensor allowing interchangeable operation in both amplitude modulation and frequency modulation ». Dans 2014 IEEE/ION Position, Location and Navigation Symposium - PLANS 2014. IEEE, 2014. http://dx.doi.org/10.1109/plans.2014.6851368.
Texte intégralChang. « Large angular aperture acousto-optic modulator ». Dans Proceedings of IEEE Ultrasonics Symposium ULTSYM-94. IEEE, 1994. http://dx.doi.org/10.1109/ultsym.1994.401683.
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