Littérature scientifique sur le sujet « Frequency transfer »
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Articles de revues sur le sujet "Frequency transfer"
Yukun Luo, Yukun Luo, Shuhua Yan Shuhua Yan, Aiai Jia Aiai Jia, Chunhua Wei Chunhua Wei, Zehuan Li Zehuan Li, Enlong Wang Enlong Wang et and Jun Yang and Jun Yang. « Revisiting the laser frequency locking method using acousto-optic frequency modulation transfer spectroscopy ». Chinese Optics Letters 14, no 12 (2016) : 121401–5. http://dx.doi.org/10.3788/col201614.121401.
Texte intégralSun, Oliver M., et Robert Pinkel. « Energy Transfer from High-Shear, Low-Frequency Internal Waves to High-Frequency Waves near Kaena Ridge, Hawaii ». Journal of Physical Oceanography 42, no 9 (11 avril 2012) : 1524–47. http://dx.doi.org/10.1175/jpo-d-11-0117.1.
Texte intégralTakiguchi, Hiroshi, Yasuhiro Koyama, Ryuichi Ichikawa, Tadahiro Gotoh, Atsutoshi Ishii, Thomas Hobiger et Mizuhiko Hosokawa. « VLBI Measurements for Frequency Transfer ». Proceedings of the International Astronomical Union 5, H15 (novembre 2009) : 225. http://dx.doi.org/10.1017/s1743921310008926.
Texte intégralPanfilo, Gianna, et Thomas E. Parker. « A theoretical and experimental analysis of frequency transfer uncertainty, including frequency transfer into TAI ». Metrologia 47, no 5 (8 septembre 2010) : 552–60. http://dx.doi.org/10.1088/0026-1394/47/5/005.
Texte intégralZhang, Hongyuan, Haoyun Wei, Honglei Yang et Yan Li. « Active laser ranging with frequency transfer using frequency comb ». Applied Physics Letters 108, no 18 (2 mai 2016) : 181101. http://dx.doi.org/10.1063/1.4948593.
Texte intégralZhang, Zhehao, et Lin Pan. « Galileo Time Transfer with Five-Frequency Uncombined PPP : A Posteriori Weighting, Inter-Frequency Bias, Precise Products and Multi-Frequency Contribution ». Remote Sensing 14, no 11 (26 mai 2022) : 2538. http://dx.doi.org/10.3390/rs14112538.
Texte intégralLi, Qi, Liang Hu, Jinbo Zhang, Jianping Chen et Guiling Wu. « Fiber Radio Frequency Transfer Using Bidirectional Frequency Division Multiplexing Dissemination ». IEEE Photonics Technology Letters 33, no 13 (1 juillet 2021) : 660–63. http://dx.doi.org/10.1109/lpt.2021.3086299.
Texte intégralZhang, Xiang, Liang Hu, Xue Deng, Qi Zang, Jie Liu, Dongdong Jiao, Jing Gao et al. « All-Passive Cascaded Optical Frequency Transfer ». IEEE Photonics Technology Letters 34, no 8 (15 avril 2022) : 413–16. http://dx.doi.org/10.1109/lpt.2022.3164406.
Texte intégralJaekel, Marc-Thierry, et Serge Reynaud. « Time-Frequency Transfer with Quantum Fields ». Physical Review Letters 76, no 14 (1 avril 1996) : 2407–11. http://dx.doi.org/10.1103/physrevlett.76.2407.
Texte intégralPufall, M. R., W. H. Rippard, S. Kaka, T. J. Silva et S. E. Russek. « Frequency modulation of spin-transfer oscillators ». Applied Physics Letters 86, no 8 (21 février 2005) : 082506. http://dx.doi.org/10.1063/1.1875762.
Texte intégralThèses sur le sujet "Frequency transfer"
Butler, Brandon. « Reliable data transfer via frequency transmission ». Thesis, Butler, Brandon (2017) Reliable data transfer via frequency transmission. Honours thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/40398/.
Texte intégralIlvedson, Corinne Rachel 1974. « Transfer function estimation using time-frequency analysis ». Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50472.
Texte intégralIncludes bibliographical references (p. 135-136).
Given limited and noisy data, identifying the transfer function of a complex aerospace system may prove difficult. In order to obtain a clean transfer function estimate despite noisy data, a time-frequency analysis approach to system identification has been developed. The method is based on the observation that for a linear system, an input at a given frequency should result in a response at the same frequency, and a time localized frequency input should result in a response that is nearby in time to the input. Using these principles, the noise in the response can be separated from the physical dynamics. In addition, the impulse response of the system can be restricted to be causal and of limited duration, thereby reducing the number of degrees of freedom in the estimation problem. The estimation method consists of finding a rough estimate of the impulse response from the sampled input and output data. The impulse response estimate is then transformed to a two dimensional time-frequency mapping. The mapping provides a clear graphical method for distinguishing the noise from the system dynamics. The information believed to correspond to noise is discarded and a cleaner estimate of the impulse response is obtained from the remaining information. The new impulse response estimate is then used to obtain the transfer function estimate. The results indicate that the time-frequency transfer function estimation method can provide estimates that are often less noisy than those obtained from other methods such as the Empirical Transfer Function Estimate and Welch's Averaged Periodogram Method.
by Corinne Rachel Ilvedson.
S.M.
Lawson, James. « High frequency electromagnetic links for wireless power transfer ». Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/54841.
Texte intégralForeman, Seth M. « Femtosecond frequency combs for optical clocks and timing transfer ». Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3273700.
Texte intégralZhao, Rui. « Double resonant high-frequency converters for wireless power transfer ». Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/22958/.
Texte intégralMarra, Giuseppe. « Transfer of optical frequency combs over optical fibre links ». Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/350220/.
Texte intégralBoaventura, Alírio de Jesus Soares. « Efficient wireless power transfer and radio frequency identification systems ». Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/17374.
Texte intégralIn the IoT context, where billions of connected objects are expected to be ubiquitously deployed worldwide, the frequent battery maintenance of ubiquitous wireless nodes is undesirable or even impossible. In these scenarios, passive-backscatter radios will certainly play a crucial role due to their low cost, low complexity and battery-free operation. However, as passive-backscatter devices are chiefly limited by the WPT link, its efficiency optimization has been a major research concern over the years, gaining even more emphasis in the IoT context. Wireless power transfer has traditionally been carried out using CW signals, and the efficiency improvement has commonly been achieved through circuit design optimization. This thesis explores a fundamentally different approach, in which the optimization is focused on the powering waveforms, rather than the circuits. It is demonstrated through theoretical analysis, simulations and measurements that, given their greater ability to overcome the built-in voltage of rectifying devices, high PAPR multi-sine (MS) signals are capable of more efficiently exciting energy harvesting circuits when compared to CWs. By using optimal MS signals to excite rectifying devices, remarkable RF-DC conversion efficiency gains of up to 15 dB with respect to CW signals were obtained. In order to show the effectiveness of this approach to improve the communication range of passive-backscatter systems, a MS front-end was integrated in a commercial RFID reader and a significant range extension of 25% was observed. Furthermore, a software-defined radio RFID reader, compliant with ISO18000-6C standard and with MS capability, was constructed from scratch. By interrogating passive RFID transponders with MS waveforms, a transponder sensitivity improvement higher than 3 dB was obtained for optimal MS signals. Since the amplification and transmission of high PAPR signals is critical, this work also proposes efficient MS transmitting architectures based on space power combining techniques. This thesis also addresses other not less important issues, namely self-jamming in passive RFID readers, which is the second limiting factor of passive-backscatter systems. A suitable self-jamming suppression scheme was first used for CW signals and then extended to MS signals, yielding a CW isolation up to 50 dB and a MS isolation up 60 dB. Finally, a battery-less remote control system was developed and integrated in a commercial TV device with the purpose of demonstrating a practical application of wireless power transfer and passive-backscatter concepts. This allowed battery-free control of four basic functionalities of the TV (CH+,CH-,VOL+,VOL-).
No contexto da internet das coisas (IoT), onde são esperados bilhões de objetos conectados espalhados pelo planeta de forma ubíqua, torna-se impraticável uma frequente manutenção e troca de baterias dos dispositivos sem fios ubíquos. Nestes cenários, os sistemas radio backscatter passivos terão um papel preponderante dado o seu baixo custo, baixa complexidade e não necessidade de baterias nos nós móveis. Uma vez que a transmissão de energia sem fios é o principal aspeto limitativo nestes sistemas, a sua otimização tem sido um tema central de investigação, ganhando ainda mais ênfase no contexto IoT. Tradicionalmente, a transferência de energia sem-fios é feita através de sinais CW e a maximização da eficiência é conseguida através da otimização dos circuitos recetores. Neste trabalho explora-se uma abordagem fundamentalmente diferente, em que a otimização foca-se nas formas de onda em vez dos circuitos. Demonstra-se, teoricamente e através de simulações e medidas que, devido à sua maior capacidade em superar a barreira de potencial intrínseca dos dispositivos retificadores, os sinais multi-seno (MS) de elevado PAPR são capazes de excitar os circuitos de colheita de energia de forma mais eficiente quando comparados com o sinal CW tradicional. Usando sinais MS ótimos em circuitos retificadores, foram verificadas experimentalmente melhorias de eficiência de conversão RF-DC notáveis de até 15 dB relativamente ao sinal CW. A fim de mostrar a eficácia desta abordagem na melhoria da distância de comunicação de sistemas backscatter passivos, integrou-se um front-end MS num leitor RFID comercial e observou-se um aumento significativo de 25% na distância de leitura. Além disso, desenvolveu-se de raiz um leitor RFID baseado em software rádio, compatível com o protocolo ISO18000-6C e capaz de gerar sinais MS, com os quais interrogou-se transponders passivos, obtendo-se ganhos de sensibilidade dos transponders maiores que 3 dB. Uma vez que a amplificação de sinais de elevado PAPR é uma operação crítica, propôs-se também novas arquiteturas eficientes de transmissão baseadas na combinação de sinais em espaço livre. Esta tese aborda também outros aspetos não menos importantes, como o self-jamming em leitores RFID passivos, tido como o segundo fator limitativo neste tipo de sistemas. Estudou-se técnicas de cancelamento de self-jamming CW e estendeu-se o conceito a sinais MS, tendo-se obtido isolamentos entre o transmissor e o recetor de até 50 dB no primeiro caso e de até 60 dB no segundo. Finalmente, com o objetivo de demonstrar uma aplicação prática dos conceitos de transmissão de energia sem fios e comunicação backscatter, desenvolveu-se um sistema de controlo remoto sem pilhas, cujo protótipo foi integrado num televisor comercial a fim de controlar quatro funcionalidades básicas (CH+,CH-,VOL+,VOL-).
Hopper, David J. « Investigation of laser frequency stabilisation using modulation transfer spectroscopy ». Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/16667/1/David_John_Hopper_Thesis.pdf.
Texte intégralHopper, David J. « Investigation of laser frequency stabilisation using modulation transfer spectroscopy ». Queensland University of Technology, 2008. http://eprints.qut.edu.au/16667/.
Texte intégralHeikkinen, Jouko. « TELEMETRY AND RADIO FREQUENCY IDENTIFICATION ». International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607334.
Texte intégralComparison of short-range telemetry and radio frequency identification (RFID) systems reveals that they are based on very similar operating principles. Combining the identification and measurement functions into one transponder sensor offers added value for both RFID and telemetry systems. The presence of a memory (e.g. FRAM) in the transponder, required for ID information, can also be utilized for storing measurement results. For passive transponders low power consumption is one of the main objectives. Wireless power transfer for passive transponder sensors together with above aspects concerning a combined telemetry and identification system are discussed.
Livres sur le sujet "Frequency transfer"
Ramaswamy, Ramkumar. On the characteristic frequency of a filter. Norwich, N.Y.] : Knovel, 2011.
Trouver le texte intégralChakraborty, D. R. Estimation of nonlinear heat and momentum transfer in the frequency domain by the use of frequency co-spectra and cross-bispectra. Pune : Indian Institute of Tropical Meteorology, 2002.
Trouver le texte intégralZhang, H. Analysing the transfer functions of nonlinear systems in the frequency domain. Sheffield : University of Sheffield, Dept. of Automatic Control and Systems Engineering, 1992.
Trouver le texte intégralMiller, R. L. Dynamic modelling of an electromechanical valve using frequency response data. Monterey, Calif : Naval Postgraduate School, 1986.
Trouver le texte intégralQ, Pan J., et United States. National Aeronautics and Space Administration., dir. Frequency analysis via the method of moment functionals. [Washington, D.C : National Aeronautics and Space Administration, 1990.
Trouver le texte intégralPinelli, Thomas E. NASA/DoD aerospace knowledge diffusion research project : summary report to phase 3 faculty and student respondents including frequency distributions. Hampton, VA : Langley Research Center, 1991.
Trouver le texte intégralS, Melis Theodore, United States. Bureau of Reclamation. et Geological Survey (U.S.), dir. Magnitude and frequency data for historic debris flows in Grand Canyon National Park and vicinity, Arizona. Tucson, Ariz : U.S. Dept. of the Interior, U.S. Geological Survey, 1995.
Trouver le texte intégralM, Wang C., et National Institute of Standards and Technology (U.S.), dir. Calibration service of optoelectronic frequency response at 1319 nm for combined photodiode/RF power sensor transfer standards. Boulder, Colo : U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1999.
Trouver le texte intégralZink, L. R. NO?□heterodyne frequency measurements with a tunable diode laser, a CO laser transfer oscillator, and CO?□laser standards. Gaithersburg, MD : U.S. Dept. of Commerce, National Bureau of Standards, 1987.
Trouver le texte intégralZink, L. R. NOb2s heterodyne frequency measurements with a tunable diode laser, a CO laser transfer oscillator, and COb2s laser standards. Gaithersburg, MD : U.S. Dept. of Commerce, National Bureau of Standards, 1987.
Trouver le texte intégralChapitres de livres sur le sujet "Frequency transfer"
Frisch, Hélène. « Asymptotic Results for Partial Frequency Redistribution ». Dans Radiative Transfer, 563–81. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-95247-1_26.
Texte intégralJonscher, A. K. « Surface Transport in Time and Frequency Domains ». Dans Energy Transfer Dynamics, 112–35. Berlin, Heidelberg : Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-71867-0_12.
Texte intégralDefraigne, Pascale. « GNSS Time and Frequency Transfer ». Dans Springer Handbook of Global Navigation Satellite Systems, 1187–206. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-42928-1_41.
Texte intégralGlisson, Tildon H. « Transfer Functions and Frequency-Domain Analysis ». Dans Introduction to Circuit Analysis and Design, 539–82. Dordrecht : Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9443-8_15.
Texte intégralSvehla, Drazen. « First Phase Clocks and Frequency Transfer ». Dans Geometrical Theory of Satellite Orbits and Gravity Field, 53–63. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76873-1_4.
Texte intégralXie, Bin, Changqing Liao, Xian Li et Zihao Ding. « Color Transfer Based on Frequency Tuning ». Dans Exploration of Novel Intelligent Optimization Algorithms, 345–52. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4109-2_31.
Texte intégralLin, Huang-Tien. « Precise Time and Frequency Transfer : Techniques ». Dans Handbook of Metrology and Applications, 1–26. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1550-5_24-1.
Texte intégralYang, Zhichao, Digbijoy N. Nath, Yuewei Zhang, Sriram Krishnamoorthy, Jacob Khurgin et Siddharth Rajan. « III-Nitride Tunneling Hot Electron Transfer Amplifier (THETA) ». Dans High-Frequency GaN Electronic Devices, 109–57. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20208-8_5.
Texte intégralFang, Zujie, Haiwen Cai, Gaoting Chen et Ronghui Qu. « Optical Phase Locked Loop and Frequency Transfer ». Dans Optical and Fiber Communications Reports, 235–66. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5257-6_8.
Texte intégralBlower, Gordon. « Transfer Functions, Frequency Response, Realization and Stability ». Dans Linear Systems, 139–72. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-21240-6_5.
Texte intégralActes de conférences sur le sujet "Frequency transfer"
CITRO, M. « PHARMACOLOGICAL FREQUENCY TRANSFER ». Dans Proceedings of the International School of Biophysics. WORLD SCIENTIFIC, 1998. http://dx.doi.org/10.1142/9789812816887_0038.
Texte intégralRieck, Carsten, Rudiger Haas, Per Jarlemark et Kenneth Jaldehag. « VLBI frequency transfer using CONT11 ». Dans 2012 European Frequency and Time Forum (EFTF). IEEE, 2012. http://dx.doi.org/10.1109/eftf.2012.6502358.
Texte intégralPetit, Gerard, Amale Kanj, Aurelie Harmegnies, Sylvain Loyer, Jerome Delporte, Flavien Mercier et Felix Perosanz. « GPS frequency transfer with IPPP ». Dans 2014 European Frequency and Time Forum (EFTF). IEEE, 2014. http://dx.doi.org/10.1109/eftf.2014.7331533.
Texte intégralDefraigne, P., W. Aerts, A. Harmegnies, G. Petit, D. Rovera et P. Uhrich. « Advances in multi-GNSS time transfer ». Dans 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC). IEEE, 2013. http://dx.doi.org/10.1109/eftf-ifc.2013.6702126.
Texte intégralParker, Thomas E., et Gianna Panfilo. « Experimental Analysis of Frequency Transfer Uncertainty ». Dans 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum. IEEE, 2007. http://dx.doi.org/10.1109/freq.2007.4319228.
Texte intégralXuhai, Yang, Hu Zhenyuan, Guo Ji, Li Xiaohui, Li Zhigang et Yuan Haibo. « Method of common-view time transfer with transfer mode based on geostationary satellite ». Dans 2012 IEEE International Frequency Control Symposium (FCS). IEEE, 2012. http://dx.doi.org/10.1109/fcs.2012.6243622.
Texte intégralSmotlacha, Vladimir, Josef Vojtech et Alexander Kuna. « Optical infrastructure for time and frequency transfer ». Dans 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC). IEEE, 2013. http://dx.doi.org/10.1109/eftf-ifc.2013.6702170.
Texte intégralHu, Liang, Guiling Wu, Jianguo Shen, Huang Huang et Jianping Chen. « Distributed time transfer using optical fiber links ». Dans 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC). IEEE, 2013. http://dx.doi.org/10.1109/eftf-ifc.2013.6702146.
Texte intégralSchediwy, Sascha, Andre Luiten, Guido Aben, Kenneth Baldwin, Yabai He, Brian Orr et Bruce Warrington. « Microwave frequency transfer with optical stabilisation ». Dans 2012 European Frequency and Time Forum (EFTF). IEEE, 2012. http://dx.doi.org/10.1109/eftf.2012.6502369.
Texte intégralKroese, Bethany, Gabriele Giorgi et Christoph Gunther. « Relativistic corrections for intersatellite frequency transfer ». Dans 2018 European Frequency and Time Forum (EFTF). IEEE, 2018. http://dx.doi.org/10.1109/eftf.2018.8409041.
Texte intégralRapports d'organisations sur le sujet "Frequency transfer"
Tang, J. Non-Markovian electron transfer reactions with frequency-dependent friction. Office of Scientific and Technical Information (OSTI), décembre 1993. http://dx.doi.org/10.2172/10141924.
Texte intégralTrudnowski, D. J. Frequency domain transfer function identification using the computer program SYSFIT. Office of Scientific and Technical Information (OSTI), décembre 1992. http://dx.doi.org/10.2172/10106833.
Texte intégralTill, Andrew T. Linear-Multi-Frequency-Grey Preconditioning for Radiative Transfer SN Calculations. Office of Scientific and Technical Information (OSTI), août 2013. http://dx.doi.org/10.2172/1090639.
Texte intégralTrudnowski, D. J. Frequency domain transfer function identification using the computer program SYSFIT. Office of Scientific and Technical Information (OSTI), décembre 1992. http://dx.doi.org/10.2172/6971318.
Texte intégralSlinker, S., et A. W. Ali. Electron Momentum Transfer Collision Frequency in N(2), O(2) and Air. Fort Belvoir, VA : Defense Technical Information Center, juillet 1985. http://dx.doi.org/10.21236/ada157030.
Texte intégralBailey, J. W. W-320 waste retrieval sluicing system transfer line flushing volume and frequency calculation. Office of Scientific and Technical Information (OSTI), novembre 1997. http://dx.doi.org/10.2172/10148004.
Texte intégralWolfe, C. R., J. D. Downie et J. K. Lawson. Measuring the spatial frequency transfer function of phase measuring interferometers for laser optics. Office of Scientific and Technical Information (OSTI), juin 1996. http://dx.doi.org/10.2172/281674.
Texte intégralBailey, J. W. W-320 waste retrieval sluicing system transfer line flushing volume and frequency calculation. Office of Scientific and Technical Information (OSTI), avril 1997. http://dx.doi.org/10.2172/16874.
Texte intégralHale, Paul D., et C. M. Wang. Calibration service of optoelectronic frequency response at 1319 nm for combined photodiodeRF power sensor transfer standards. Gaithersburg, MD : National Institute of Standards and Technology, 1999. http://dx.doi.org/10.6028/nist.sp.250-51.
Texte intégralZink, L. R. NO₂ Heterodyne frequency measurements with a tunable diode laser, a CO laser transfer oscillator, and CO₂ laser standards,. Gaithersburg, MD : National Bureau of Standards, 1987. http://dx.doi.org/10.6028/nbs.tn.1308.
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