Littérature scientifique sur le sujet « Down and Up conversions »
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Articles de revues sur le sujet "Down and Up conversions"
LI Bin, 李斌, 冯勋立 FENG Xun-li et 张智明 ZHANG Zhi-ming. « Frequency Up- and Down-conversions in Two-mode Cavity ». ACTA PHOTONICA SINICA 40, no 8 (2011) : 1161–65. http://dx.doi.org/10.3788/gzxb20114008.1161.
Texte intégralLin, Hang, José Marqués-Hueso, Daqin Chen, Yuansheng Wang et Bryce S. Richards. « Tm3+-sensitized up- and down-conversions in nano-structured oxyfluoride glass ceramics ». Materials Research Bulletin 47, no 12 (décembre 2012) : 4433–37. http://dx.doi.org/10.1016/j.materresbull.2012.09.048.
Texte intégralZhuang, Jianle, Xianfeng Yang, Junxiang Fu, Chaolun Liang, Mingmei Wu, Jing Wang et Qiang Su. « Monodispersed β-NaYF4 Mesocrystals : In Situ Ion Exchange and Multicolor Up- and Down-Conversions ». Crystal Growth & ; Design 13, no 6 (6 mai 2013) : 2292–97. http://dx.doi.org/10.1021/cg301751c.
Texte intégralWang, L., P. Li et Y. Li. « Down- and Up-Conversion Luminescent Nanorods ». Advanced Materials 19, no 20 (20 septembre 2007) : 3304–7. http://dx.doi.org/10.1002/adma.200700144.
Texte intégralJuan, Yu Lin. « A Wide Voltage-Ratio Dual-Output DC Converter for Charging Series-Connected Batteries ». Energies 12, no 9 (30 avril 2019) : 1650. http://dx.doi.org/10.3390/en12091650.
Texte intégralDing, Mingye, Chunhua Lu, Yan Song, Yaru Ni et Zhongzi Xu. « Hydrothermal synthesis of ordered β-NaYF4 nanorod self-assemblies with multicolor up- and down-conversions ». CrystEngComm 16, no 6 (2014) : 1163. http://dx.doi.org/10.1039/c3ce41860j.
Texte intégralEhrler, Bruno, Nobuhiro Yanai et Lea Nienhaus. « Up- and down-conversion in molecules and materials ». Journal of Chemical Physics 154, no 7 (21 février 2021) : 070401. http://dx.doi.org/10.1063/5.0045323.
Texte intégralYan, R. X., et Y. D. Li. « Down/Up Conversion in Ln3+-Doped YF3 Nanocrystals ». Advanced Functional Materials 15, no 5 (mai 2005) : 763–70. http://dx.doi.org/10.1002/adfm.200305044.
Texte intégralScudder, Jillian M., Sara L. Ellison, Loubna El Meddah El Idrissi et Henry Poetrodjojo. « Conversions between gas-phase metallicities in MaNGA ». Monthly Notices of the Royal Astronomical Society 507, no 2 (13 août 2021) : 2468–87. http://dx.doi.org/10.1093/mnras/stab2339.
Texte intégralZhu, Jing, Shuai Yan, Hongjia Huang, Wei Cong, Changhui Gong, Fanfan Zheng et Shuo Li. « Research on Key Technologies of High-Reliability Telemetry Transmitters for Launch Vehicle Carrying ». Journal of Physics : Conference Series 2670, no 1 (1 décembre 2023) : 012016. http://dx.doi.org/10.1088/1742-6596/2670/1/012016.
Texte intégralThèses sur le sujet "Down and Up conversions"
Smara, Zakarya. « Etudes des propriétés optiques de nanoparticules de fluorures Na(Y,Bi)F4 dopées par des ions de terres rares et synthétisées par coprécipitation ». Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2021. http://www.theses.fr/2021UCFAC030.
Texte intégralThis work is devoted to the development of nanophosphors of formulations β-NaBiF4 and α-NaYF4 monodoped Eu3+, Tb3+, Pr3+, codoped with Yb3+ and tridoped with Ce3+. These materials were prepared by coprecipitation, and the synthesis parameters were optimized to produce nanocubes (NCs) with edge lengths between 35 and 65 nm, reproducibly and with a narrow size distribution. The obtained NCs were characterized from a structural (XRD, IR), morphological (SEM and TEM) and optical (photoluminescence) point of view, making it possible to confirm their crystalline purities on the one hand and to record spectral distributions of luminescence in accordance with those expected on the other hand. Analysis of emission spectra and fluorescence decays, under UV and / or near infrared excitations, has demonstrated that efficient Stokes and anti-Stokes conversion processes occur in these NCs. The results are discussed by considering various paths of radiative de-excitations and energy transfer, making it possible to conclude that the two processes can be generated on the same NC, even if the latter are in competition in certain cases
Termos, Hassan. « Study of up & ; down conversion technique by all-optical sampling based on SOA-MZI ». Thesis, Brest, 2017. http://www.theses.fr/2017BRES0021/document.
Texte intégralFrequency mixing is a key function existing in different systems, especially in mixed photonic-microwave ones. Today, the supremacy of optical networks to carry high bitrate data over large distances motivates the optical implementation of such functions to benefit from the low loss, high bandwidth, low size and weight of optical technologies. In this work, we study a photonic mixer based on a SOA-MZI (Semiconductor Optical Amplifier Mach-Zehnder Interferometer) device and a sampling technique allowing both conversion towards high and low frequencies.The involved mixing principle exploits the spectral characteristics of a sampled signal in which replicas of the original spectrum exist at different other frequencies. Basing the frequency conversion on a sampling technique gives two advantages: the photonic mixer configuration is the same for up and down conversions, and the frequency of the local oscillator can be less than the addressed frequency range.The implementation of such a sampling technique needs an optically-controlled high-frequency optical switch. As shown in this work, a SOA-MZI can play this role. Depending on the relative phase between its arms, an interferometric structure (MZI) can transmit or cancel an optical input signal. By locating one SOA in each arm of the MZI structure, the cross-phase modulation that exists inside an SOA is exploited to optically control the optical switch state of the MZI.Controlled by an optical pulse source, this optical switch is able to sample an optical input signal carrying complexmodulated data. Frequency conversions of mono and multi-carrier signals in the range 0.5-39.5 GHz have been successfully achieved. By using a differential configuration of the SOA-MZI, both up and down conversions at bitrates up to 1 Gb/s are reached
Cheroura, Youcef. « Photoconversion et exaltation plasmonique de nanoparticules de β-NaGdF4 pour potentielles applications photovoltaïques sur silicium ». Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2021. http://www.theses.fr/2021UCFAC023.
Texte intégralA multifunctional system was developed to be used as a dual ultraviolet (UV) and near infrared (NIR) light harvester and photo-converters by Down (DS-DC) and Up Conversions (UC) in visible light to enhance the light trapping properties of thin-film solar cells. Nanorods ( 140 nm x 60 nm) of β-NaGdF4 singly doped by Eu3+, Pr3+, Er3+ and co-doped by Yb3+ were synthesized by co-precipitation method (optimized conditions: 150°C, 60 min). The structural and morphological properties were characterized by X-ray diffraction, infrared spectroscopy, Raman and electron microscopy (TEM) confirming the quality of the elaborated materials. Using the structural probe properties of the Eu3+ ion, local order was identified and discussed on the basis of Judd-Ofelt theory. The analysis of the fluorescence properties was carried out under pulsed and cw excitations. The radiative de-excitation and energy transfer channels for both DC and UC processes, occurring in each system, have been identified and discussed based on the evolution of fluorescence intensities as a function of continuous pump power and on the kinetics of luminescence decays under UV and NIR excitations. Particular attention was paid to the Er3+/Yb3+ system for which a coupling by plasmonic effect was considered with metallic nanoparticles (NPMs) of noble metals gold and silver. Depending on the nature, shape and size of the NPMs, enhancements or attenuations of fluorescence intensities, in addition in some cases to an increase in decaying rates have been observed. They are discussed considering two main processes, scattering and the Purcell effects
Dieudonné, Belto. « Guides d’onde en verres et vitrocéramiques fluorés dopés terre rare élaborés par PVD pour l’émission dans le visible et la conversion de fréquence ». Thesis, Le Mans, 2012. http://www.theses.fr/2012LEMA1023/document.
Texte intégralThe project joins in the development of miniaturized laser sources RGB for display and videoprojection, frequency conversion in solar cells.Fluoride glasses ZLAG ( ZrF4-LaF3-AlF3-GaF3) co-doped with rare earths were studied. This glass has a low phonon energy, a strong solubility of the rare earth ions and can be fabricated as thin films by PVD. It is also the precursor of transparent glass-ceramics. Similar emissions in both co-doped bulk and waveguides have been observed ; blue, orange, red emission for Pr3+-Yb3+ and blue, red emission for Tm3+-Yb3+. The RGB emission in bulk Tm3+-Er3+-Yb3+ tri-doped glass seems promising. Furthermore, the absorption cross section of Pr3+ and Yb3+ ions has been increased by 30% with the ceraming process.An energy transfer efficiency (ETE) of 92% has been obtained for co-doped glass with 0,5Pr3+-10Yb3+ for the conversion process of a blue photon into two infrared one
Tian, Hai, Tom Trojak et Charles H. Jones. « COMMUNICATIONS OVER AIRCRAFT POWER LINES : A PRACTICAL IMPLEMENTATION ». International Foundation for Telemetering, 2006. http://hdl.handle.net/10150/603939.
Texte intégralThis paper presents a practical implementation of a hardware design for transmission of data over aircraft power lines. The intent of such hardware is to significantly reduce the wiring in the aircraft instrumentation system. The potential usages of this technology include pulse code modulation (PCM), Ethernet and other forms data communications. Details of the fieldprogrammable gate array (FPGA) and printed circuit board (PCB) designs of the digital and analog front end will be discussed. The power line is not designed for data transmission. It contains considerable noise, multipath effects, and time varying impedance. Spectral analysis data of an aircraft is presented to indicate the difficulty of the problem at hand. A robust modulation is required to overcome the harsh environment and to provide reliable transmission. Orthogonal frequency division multiplexing (OFDM) has been used in power line communication industry with a great deal of success. OFDM has been deemed the most appropriate technology for high-speed data transmission on aircraft power lines. Additionally, forward error correction (FEC) techniques are discussed.
Dieudonné, Belto. « Guides d'onde en verres et vitrocéramiques fluorés dopés terre rare élaborés par PVD pour l'émission dans le visible et la conversion de fréquence ». Phd thesis, Université du Maine, 2012. http://tel.archives-ouvertes.fr/tel-00808593.
Texte intégralBjörklund, Daniel. « Implementation of a Software-Defined Radio Transceiver on High-Speed Digitizer/Generator SDR14 ». Thesis, Linköpings universitet, Elektroniksystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78213.
Texte intégralBall, Justin. « Up-down asymmetric tokamaks ». Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:b7932b07-1388-497e-8d95-4bdffabc52d9.
Texte intégralSolway, David. « Teaching down or learning up ». Mémoire, Université de Sherbrooke, 1995. http://hdl.handle.net/11143/9212.
Texte intégralKarlsson, Rikard. « Hybrid start up/shut down vibrations ». Thesis, KTH, Farkost och flyg, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-39688.
Texte intégralLivres sur le sujet "Down and Up conversions"
Munsch, Robert N. Up, up, down. Toronto : Scholastic, 2011.
Trouver le texte intégralMunsch, Robert N. Up, up, down ! New York : Scholastic, 2001.
Trouver le texte intégralMunsch, Robert N. Up, up, down. New York : Scholastic, 2002.
Trouver le texte intégralLittle Acorn & Associates, Inc et Roberta Suid, dir. Up down. Iverness, CA : Monday Morning Books, 2006.
Trouver le texte intégralUp / down. New York : Benchmark Books, 2004.
Trouver le texte intégralUp & down. [New York] : Little Simon, 1993.
Trouver le texte intégralStaying up, up, up in a down, down, world. Nashville, Tenn : Thomas Nelson, 2000.
Trouver le texte intégralUp, down, and up again. Santa Cruz, CA : American Poetry Association, 1990.
Trouver le texte intégralUp and down. Unity, Me : Five Star, 2000.
Trouver le texte intégralRivière, Marc. Up and down. Paris : Ipso Facto, 1999.
Trouver le texte intégralChapitres de livres sur le sujet "Down and Up conversions"
Zieliński, Tomasz P. « Introduction to SDR : IQ Signals and Frequency Up-Down Conversion ». Dans Starting Digital Signal Processing in Telecommunication Engineering, 483–515. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-49256-4_17.
Texte intégralAgrawal, Ruchi, Manas Srivastava et Raghumani S. Ningthoujam. « Photo-Luminescent Materials : Down-Conversion, Quantum Cutting, Up-Conversion, Photo-Avalanche, Core@Shell Nanostructures ». Dans Handbook of Materials Science, Volume 1, 25–67. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-7145-9_2.
Texte intégralBorne, Adrien, Iännis Roland, Marco Ravaro, Giuseppe Marino, Stefan Suffit, Pascal Filloux, Aristide Lemaître, Ivan Favero et Giuseppe Leo. « Nonlinear Up- and Down-Conversion in AlGaAs Microdisks Integrated in a Photonic Circuit ». Dans NATO Science for Peace and Security Series B : Physics and Biophysics, 247–49. Dordrecht : Springer Netherlands, 2021. http://dx.doi.org/10.1007/978-94-024-2138-5_15.
Texte intégralBill, Kirsten. « "Thus Alle pis Thyngys Turnyng Up-so-down" : Translation, Conversion and Subjectivity in The Book of Margery Kempe ». Dans The Medieval Translator. Traduire au Moyen Age, 270–84. Turnhout : Brepols Publishers, 1998. http://dx.doi.org/10.1484/m.tmt-eb.4.00027.
Texte intégralStrathausen, Roger. « Up and Down ». Dans Leading When You’re Not the Boss, 113–17. Berkeley, CA : Apress, 2015. http://dx.doi.org/10.1007/978-1-4842-1748-1_9.
Texte intégralMidgley, Mary. « Up and Down ». Dans Beast and Man, 145–64. 2e éd. London : Routledge, 2021. http://dx.doi.org/10.4324/9780203380192-10.
Texte intégralDevonshire-Ellis, Chris, Andy Scott et Sam Woollard. « WFOE Conversions and Closures ». Dans Setting Up Wholly Foreign Owned Enterprises in China, 49–60. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15540-6_3.
Texte intégralDevonshire-Ellis, Chris, Andy Scott et Sam Woollard. « Joint Venture Conversions and Closures ». Dans Setting Up Joint Ventures in China, 107–12. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16040-0_6.
Texte intégralAuzel, F. « Up-conversions in RE-doped Solids ». Dans Spectroscopic Properties of Rare Earths in Optical Materials, 266–319. Berlin, Heidelberg : Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-28209-2_5.
Texte intégralBerg Hansen, Kim. « Up-and-Down Patterns ». Dans Practical Oracle SQL, 325–49. Berkeley, CA : Apress, 2020. http://dx.doi.org/10.1007/978-1-4842-5617-6_17.
Texte intégralActes de conférences sur le sujet "Down and Up conversions"
Jaiyen, Jakaphan, Alongkom Namahoot et Prayoot Akkaraekthalin. « A 2.4-2.5 GHz Singly Balanced Diode Mixer for Up and Down Conversions ». Dans 2006 International Symposium on Communications and Information Technologies. IEEE, 2006. http://dx.doi.org/10.1109/iscit.2006.339951.
Texte intégralTermos, Hassan, Thierry Rampone, Ammar Sharaiha, Ali Hamie et Ali Alaeddine. « OFDM signal up and down frequency conversions by a sampling method using a SOA-MZI ». Dans 2017 29th International Conference on Microelectronics (ICM). IEEE, 2017. http://dx.doi.org/10.1109/icm.2017.8268822.
Texte intégralKwiat, P. G. « The Conversion Revolution : Down, Up and Sideways ». Dans QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING. AIP, 2004. http://dx.doi.org/10.1063/1.1834448.
Texte intégralRichards, Bryce S., Aruna Ivaturi, Sean K. W. MacDougall et Jose Marques-Hueso. « Up- and down-conversion materials for photovoltaic devices ». Dans SPIE Photonics Europe, sous la direction de Ralf Wehrspohn et Andreas Gombert. SPIE, 2012. http://dx.doi.org/10.1117/12.923298.
Texte intégralKwiat, Paul, Joseph Altepeter, Evan Jeffrey, Nicholas Peters et Aaron VanDevender. « Up-, down- and sideways-conversion for quantum information ». Dans International Quantum Electronics Conference. Washington, D.C. : OSA, 2004. http://dx.doi.org/10.1364/iqec.2004.itha1.
Texte intégralHartmann, Paul, Peter Pachler, Elisabeth L. Payrer et Stefan Tasch. « Up and down : color conversion for solid-state lighting ». Dans SPIE OPTO : Integrated Optoelectronic Devices, sous la direction de Klaus P. Streubel, Heonsu Jeon et Li-Wei Tu. SPIE, 2009. http://dx.doi.org/10.1117/12.809033.
Texte intégralLi, Guanlin, Hongwen Li, Xiyou Chen, Mahshid Amirabadi, Xianmin Mu et Brad Lehman. « Quadratic Step-up/down Converters with Wider Conversion Ratio ». Dans 2022 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2022. http://dx.doi.org/10.1109/ecce50734.2022.9947507.
Texte intégralSong, Ming, Weiwei Guan, Guodong Liu, Meichen Yan et Shigang Zhou. « Design of the Ka-Band Up-Down Conversion Module ». Dans 2021 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP). IEEE, 2021. http://dx.doi.org/10.1109/imws-amp53428.2021.9644026.
Texte intégralVerma, Deepak, Tor O. Saetre et Ole-Morten Midtgard. « Review on up/down conversion materials for solar cell application ». Dans 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC). IEEE, 2012. http://dx.doi.org/10.1109/pvsc.2012.6318129.
Texte intégralKou, Xiaobing, Facheng Zhang, Liang Li et Guanghua Yang. « An X-band Up-down Conversion System with Variable Bandwidth ». Dans 2022 International Conference on Microwave and Millimeter Wave Technology (ICMMT). IEEE, 2022. http://dx.doi.org/10.1109/icmmt55580.2022.10022704.
Texte intégralRapports d'organisations sur le sujet "Down and Up conversions"
Richards, Whitman. Top-Down Influences on Bottom-Up Processing. Fort Belvoir, VA : Defense Technical Information Center, janvier 1993. http://dx.doi.org/10.21236/ada261514.
Texte intégralOrdoñez, Guillermo, et Facundo Piguillem. Savings and Saving Rates : Up or Down ? Cambridge, MA : National Bureau of Economic Research, mai 2020. http://dx.doi.org/10.3386/w27179.
Texte intégralRichards, Whitman. Top-Down Influences on Bottom-Up Processing. Fort Belvoir, VA : Defense Technical Information Center, mai 1991. http://dx.doi.org/10.21236/ada238235.
Texte intégralLogan, John, Andrew Foster, Hongwei Xu et Wenquan Zhang. Income Segregation : Up or Down, and for Whom ? Cambridge, MA : National Bureau of Economic Research, avril 2020. http://dx.doi.org/10.3386/w27045.
Texte intégralKristanto, Gabriel Andari. Garbage went up as homes were locked down. Sous la direction de Ria Ernunsari, Sarah Bailey et Sara Phillips. Monash University, juin 2022. http://dx.doi.org/10.54377/12bc-6537.
Texte intégralDoerry, Armin. Coherent Processing of Up/Down Linear Frequency Modulated Chirps. Office of Scientific and Technical Information (OSTI), novembre 2020. http://dx.doi.org/10.2172/1716574.
Texte intégralMumm, Jared M., Joseph D. Stock, Samaneh Azarpajouh, Amber Howell, Anna K. Johnson, Kenneth J. Stalder et Julia A. Calderón Díaz. Depiction of Lying Down and Standing up Sequences in Multiparous Sows. Ames (Iowa) : Iowa State University, janvier 2017. http://dx.doi.org/10.31274/ans_air-180814-346.
Texte intégralJohnson, Paul, et Christopher Giles. Taxes down, taxes up : the effects of a decade of tax changes. Institute for Fiscal Studies, février 1994. http://dx.doi.org/10.1920/co.ifs.1994.0041.
Texte intégralSammy Andrzejaczek, Sammy Andrzejaczek. Why do tiger sharks swim up and down the water column ? – An up-close view of their vertical movements. Experiment, mai 2016. http://dx.doi.org/10.18258/7190.
Texte intégralBenzarti, Youssef, Dorian Carloni, Jarkko Harju et Tuomas Kosonen. What Goes Up May Not Come Down : Asymmetric Incidence of Value-Added Taxes. Cambridge, MA : National Bureau of Economic Research, septembre 2017. http://dx.doi.org/10.3386/w23849.
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