Bibliographies thématiques / Higher order harmonics

Littérature scientifique sur le sujet « Higher order harmonics »

Auteur : Grafiati
Publié le 11 mars 2023

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Articles de revues sur le sujet "Higher order harmonics"

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Vijayalakshmi, V. J., C. S. Ravichandran et A. Amudha. « Predetermination of Higher Order Harmonics by Dual Phase Analysis ». Applied Mechanics and Materials 573 (juin 2014) : 13–18. http://dx.doi.org/10.4028/www.scientific.net/amm.573.13.

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Previous research was mainly concentrated on eliminating the selected lower order harmonics depending on the level of inverter which was assumed to be high. The harmonics may be present even in the higher order also. The analysis of harmonic spectrum by Finite Fourier Transform yields a very accurate result for lower order harmonics. For obtaining accurate Total Harmonic Distortion (THD) value and the harmonic spectrum, inclusion of higher order harmonics is essential. The method for accurate estimation is proposed in this paper. In normal practice, the higher order harmonics present in the output of the inverter are suppressed by using filters. In order to obtain more optimized higher order harmonics, it is necessary to obtain an accurate assessment of the higher order spectrum. The higher order spectrum is predetermined by proposed technique termed as Dual Phase Analysis (DPA) so as to obtain more optimized switching angles with the application of any Optimization Technique. This is an effective tool to analyze the various higher order components of the harmonic spectrum.
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Ozaki, T., L. Elouga Bom et R. A. Ganeev. « Extending the capabilities of ablation harmonics to shorter wavelengths and higher intensity ». Laser and Particle Beams 26, no 2 (juin 2008) : 235–40. http://dx.doi.org/10.1017/s026303460800027x.

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AbstractWe study the generation of high-order harmonics from plasma plume, by using the 20 TW, 10 Hz laser of the Advanced Laser Light Source (ALLS). We perform detailed studies on enhancement of single high-order harmonics generated in laser plasma using the fundamental and second harmonic of the ALLS beam line. Quasi-monochromatic harmonics are observed for Mn, Cr, Sb, Sn, and In plasmas. We identify most of the ionic/neutral transitions responsible for the enhancement, which all have strong oscillator strengths. Intensity enhancements of the 13th, 17th, 21st, 29th, and 33rd harmonics from these targets are demonstrated using the 800 nm pump laser and varying its chirp. We also observed harmonic enhancement from some targets for 400 nm pump laser. Using Mn plume, we demonstrated the highest harmonic photon energy (52.9 eV) at which enhancement has been observed (17th order, λ = 23.5 nm).
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Yeganeh, Mohammad, et Saifollah Rasouli. « Moiré fringes of higher-order harmonics versus higher-order moiré patterns ». Applied Optics 57, no 33 (16 novembre 2018) : 9777. http://dx.doi.org/10.1364/ao.57.009777.

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Kuchuk, Kfir, et Uri Sivan. « Accurate, explicit formulae for higher harmonic force spectroscopy by frequency modulation-AFM ». Beilstein Journal of Nanotechnology 6 (13 janvier 2015) : 149–56. http://dx.doi.org/10.3762/bjnano.6.14.

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The nonlinear interaction between an AFM tip and a sample gives rise to oscillations of the cantilever at integral multiples (harmonics) of the fundamental resonance frequency. The higher order harmonics have long been recognized to hold invaluable information on short range interactions but their utilization has thus far been relatively limited due to theoretical and experimental complexities. In particular, existing approximations of the interaction force in terms of higher harmonic amplitudes generally require simultaneous measurements of multiple harmonics to achieve satisfactory accuracy. In the present letter we address the mathematical challenge and derive accurate, explicit formulae for both conservative and dissipative forces in terms of an arbitrary single harmonic. Additionally, we show that in frequency modulation-AFM (FM-AFM) each harmonic carries complete information on the force, obviating the need for multi-harmonic analysis. Finally, we show that higher harmonics may indeed be used to reconstruct short range forces more accurately than the fundamental harmonic when the oscillation amplitude is small compared with the interaction range.
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Sei, Norihiro, Hiroshi Ogawa, Kawakatsu Yamada, Masaki Koike et Hideaki Ohgaki. « Spectral modulation of higher harmonic spontaneous emission from an optical klystron ». Journal of Synchrotron Radiation 21, no 4 (10 mai 2014) : 654–61. http://dx.doi.org/10.1107/s160057751400678x.

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Higher harmonics of spontaneous emission from an optical klystron have been observed. The modulation factor of the spontaneous emission spectrum for the higher harmonics can be described by considering the observation system. When the dispersive gap of the optical klystron was fixed, the microstructure interval of the spontaneous emission spectrum at a certain resonant wavelength became narrower as the order of the higher harmonic became larger. Some unique characteristics of the higher harmonics have been clarified, and these studies are likely to contribute to the development of free-electron lasers using higher harmonics of an optical klystron in the shorter-wavelengths region.
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Giesecke, A. L., C. Peth, T. Toncian, O. Willi et M. Cerchez. « UV harmonics generated on modulated targets irradiated by high-intensity laser pulses ». Laser and Particle Beams 37, no 01 (18 février 2019) : 12–17. http://dx.doi.org/10.1017/s0263034619000090.

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AbstractThe generation of high-order harmonics in ultraviolet spectral range by targets of periodic modulation interacting with relativistic, high contrast laser pulse (Iλ2= 1020W/cm2· μm2) was investigated experimentally and numerically. The spectral intensity of the 2nd- and 3rd-order harmonic emission from grating of different periodicities (250, 410, and 480 nm) is presented. The enhancement of the 3rd harmonic order compared with 2nd was observed for a grating of 480 nm periodicity. The experimental results indicate the role of the grating periodicity on the emission efficiency of different higher order harmonics in the UV spectral range. The higher order harmonics are emitted at the grating surface separated from the specular reflection of the laser pulse, due of the interference effects. In addition, 2D numerical PIC simulations demonstrate a complex angular distribution of the higher harmonics (HH) spectral intensity and confirm the strong dependence of the HH efficiency of a specific order on the grating periodicity, as observed experimentally. These special features of the high harmonic emission by periodically modulated targets open the route toward the control of HH spectral composition and of the emission efficiency of the lower order harmonics.
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González-López, Antonio. « Using higher order harmonics in MTF calculations ». Biomedical Physics & ; Engineering Express 3, no 2 (12 avril 2017) : 025019. http://dx.doi.org/10.1088/2057-1976/aa6702.

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Khan, Muhammad Imran, Ahmed S. Alshammari, Badr M. Alshammari et Ahmed A. Alzamil. « Estimation and Analysis of Higher-Order Harmonics in Advanced Integrated Circuits to Implement Noise-Free Future-Generation Micro- and Nanoelectromechanical Systems ». Micromachines 12, no 5 (10 mai 2021) : 541. http://dx.doi.org/10.3390/mi12050541.

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This work deals with the analysis of spectrum generation from advanced integrated circuits in order to better understand how to suppress the generation of high harmonics, especially in a given frequency band, to design and implement noise-free systems. At higher frequencies, the spectral components of signals with sharp edges contain more energy. However, current closed-form expressions have become increasingly unwieldy to compute higher-order harmonics. The study of spectrum generation provides an insight into suppressing higher-order harmonics (10th order and above), especially in a given frequency band. In this work, we discussed the influence of transistor model quality and input signal on estimates of the harmonic contents of switching waveforms. Accurate estimates of harmonic contents are essential in the design of highly integrated micro- and nanoelectromechanical systems. This paper provides a comparative analysis of various flip-flop/latch topologies on different process technologies, i.e., 130 and 65 nm. An FFT plot of the simulated results signifies that the steeper the spectrum roll-off, the lesser the content of higher-order harmonics. Furthermore, the results of the comparison illustrate the improvement in the rise time, fall time, clock-Q delay and spectrum roll-off on the better selection of slow-changing input signals and more accurate transistor models.
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Huang, Yubo, Jundong Zhang, Dong Chen et Zhiwei Jia. « Simulation Research on Phase Locking Technology Based on Modified DSOGI-PLL ». Journal of Physics : Conference Series 2219, no 1 (1 avril 2022) : 012004. http://dx.doi.org/10.1088/1742-6596/2219/1/012004.

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Abstract For complex working conditions in power grid, it is easy to produce a large number of harmonics, and the double second-order generalized integrator phase-locked loop (DSOGI-PLL) cannot effectively suppress low-order harmonics, a new DSOGI-PLL based on modified sequential cascaded harmonic cancellation module is proposed in this paper. By designing a harmonic cancellation module that eliminates specific frequency harmonics, different frequency harmonic cancellation modules are cascaded in order from small to large to eliminate low frequency harmonics near the basic frequency. By building the simulation model, the comparison analysis verifies that the modified DSOGI-PLL has higher accuracy in tracking the frequency and phase of the voltage signal, and is more suitable for the power grid.
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Omer, Mohammad, et Farasat Munir. « Interference cancellation for higher harmonics of supply-modulated efficient RF power amplifier systems ». International Journal of Microwave and Wireless Technologies 9, no 4 (18 août 2016) : 729–39. http://dx.doi.org/10.1017/s1759078716000933.

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In building highly efficient transmitters of today, one is forced to sacrifice linearity for efficiency. Some of the highest power amplifier efficiency figures are reported by envelope tracking (ET) amplifiers. These amplifiers can generate strong higher-order harmonics, which can lead to interference with receivers operating at the harmonic frequencies. Using non-linear interference cancellation, we can help to remove the interference being caused in those receivers. This paper looks at the problem of modeling the third and second-order harmonic emission from an ET amplifier. It derives the non-linear kernel for estimating such interference. This kernel has been rigorously expanded to show its correlation with the various harmonics and its effectiveness in predicting the harmonic content. We then set up an envelope amplifier test-bench to capture harmonic signal content and cancel it using the derived kernel model. The experiment yields excellent agreement with theory and provides a validation of the system and concept.
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Thèses sur le sujet "Higher order harmonics"

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Chowdhury, Rehana Momtaz Engineering &amp Information Technology Australian Defence Force Academy UNSW. « Use of Higher Order Harmonics from a Limiter to Improve the Single-Tone Detection Performance of an Envelope Detector ». Awarded by:University of New South Wales - Australian Defence Force Academy. Engineering & ; Information Technology, 2009. http://handle.unsw.edu.au/1959.4/43512.

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The limiter is a commonly used device in communication receiving systems to remove the amplitude variations of the received signal, but it is usually observed that limiter degrades the envelope detection performance of a single tone. In this thesis, it is demonstrated that the limiter-generated third harmonic can be used to improve the envelope detection performance of a single tone over that of the linearly processed fundamental. Differences in the probability distributions of the limiter-generated harmonics cause differences in their detection probabilities, which lead to differences in the performance of subsequent envelope detection. Comparison of the envelope detection performance of the limiter-generated third harmonic and the input to the limiter shows a maximum detection probability gain of 1.12 and also error probability gain of 2.4 in linear scale, whereas the fundamental harmonic does not show any practically significant gain. The envelope detection performance of the vector sum of the limiter-generated fundamental and third harmonics is also evaluated. This combination provides better performance than do the individual harmonics, especially for a large clipping parameter of the limiter. The combined harmonics shows a maximum detetction probability gain of 1.15 and error probability gain of 14, over that of the envelope detection performance of a tone without limiter. It is also observed that the envelope detection performance of a tone with limiter-generated higher harmonics shows non-monotonic behaviour as functions of either noise or the limiter-clipping parameter, which is a signature of stochastic resonance. The theoretical results from earlier research on the envelope detection of a single tone embedded in additive white Gaussian noise, both with and without a limiter, are presented and shown to match our simulation results. In previous work when a limiter was used in the envelope detection of a single tone, only the envelope of the fundamental harmonic was considered under very specific conditions. By contrast we also take notice of the limiter-generated higher harmonics and obtain improved envelope detection performance in the detection of a single tone.
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Schapper, Florian. « Attosecond structure of high-order harmonics ». Konstanz Hartung-Gorre, 2010. http://d-nb.info/1000540448/04.

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Hammond, Thomas John. « Intracavity generation of high order harmonics ». Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/39747.

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The goal of this work is the generation of extreme ultraviolet (EUV) radiation from a laser based source. To this end, we use high harmonic generation (HHG) to convert the near infrared output of a mode-locked Ti:Sapphire laser oscillator to the EUV. The requirement for HHG is a high peak intensity (>10¹³ W/cm²), which can be met by external amplification of the laser output. The method of amplification chosen for this work is a femtosecond enhancement cavity (fsEC), which stores and amplifies the output of a femtosecond mode-locked Ti:Sapphire laser by greater than a factor of 900 while maintaining the original repetition rate of 66 MHz. The design, benefits, and limitations of using a fsEC are discussed. The EUV light is created by the interaction of the amplified light with xenon gas delivered to the fsEC focus. The strong intracavity field leads to xenon plasma generation with detrimental effects on the HHG process, where it is shown that HHG is sensitive to the xenon gas and plasma dynamics. Methods of minimizing the plasma density and maximizing the EUV amplitude are discussed. The EUV is coupled out of the cavity, and up to the thirteenth harmonic (61 nm) of the laser is observed. The relative amplitudes of the different quantum trajectories generating the harmonics are calculated theoretically, and compared to experiment. The generated power of the eleventh harmonic (72 nm) is estimated to be 30μW, with a measured outcoupled power of 1.1μW. The relative intensity noise is also measured, with a cumulative root-mean-square (RMS) noise of <1.2% over 100 Hz - 100 kHz bandwidth. In comparison to other laser based HHG systems, while the EUV flux is similar, the cumulative RMS noise is an order of magnitude lower.
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Wagner, Nicholas L. « High-order harmonic generation from molecules ». Connect to online resource, 2008. 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:3303823.

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Zhu, Xuemei. « A higher-order panel method for third-harmonic diffraction problems ». Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43339.

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Kaassamani, Shatha. « Polarization Spectroscopy of High Order Harmonic Generation in Semiconductors Orbital angular momentum from semiconductor high-order harmonics All semiconductor enhanced highharmonic generation from a single nanostructured cone ». Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP091.

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Depuis sa première observation, la génération d'harmonique d'ordre élevé (HHG) dans les cristaux s'est avérée d'être une source efficace, contrôlable et compacte de rayonnement XUV cohérent. Dans cette thèse, nous étudions la génération d'harmonique d'ordre élevé (HHG) dans le graphène, et dans différents semi-conducteurs principalement oxyde de zinc, silicium, arséniure de gallium et oxyde de magnésium. Nous observons que les propriétés du laser, notamment l'intensité, polarisation et ellipticité ainsi que les propriétés du cristal impactent de manière corrélée au processus de génération d'harmonique. De plus, nous surlignons le rôle important des effets de propagation linéaire et non linéaire, surtout l'effet Kerr, qui peut modifier l'efficacité de génération d'harmonique. Bien que ceux-ci induisent des limitations, dans certaines conditions ils présentent un avantage. Finalement, nous démontrons la possibilité d'augmenter localement l'intensité du laser par confinement dans un cône nanostructuré et ainsi d’accroître le flux harmonique généré. Enfin, nous démontrons une application en imagerie par diffraction cohérente de la source harmonique nanostructurée
Since its first observation, a decade ago, high harmonic generation (HHG) in crystals has proved to be an efficient, controllable and compact source of coherent XUV radiation. In this thesis, we investigate HHG in 2D materials, particularly graphene, and in different semiconductor crystals mainly zinc oxide, silicon, gallium arsenide and magnesium oxide. We find that the laser properties, such as its intensity, polarization and ellipticity, and the crystal properties are interrelated. Moreover, we shed the light on the role of the linear and nonlinear propagation effects mainly the Kerr effect, upon laser interaction with the crystal, which can significantly influence the high harmonic generation efficiency. Although this presents major limitations, we show that in some cases it turns out to be an advantage. Finally, we demonstrate the manipulation of the harmonic radiation at the source of the emission by patterning nanostructures to confine and enhance nanojoule laser pulses, and generate harmonic beams carrying orbital angular momentum. Lastly, we successfully image a micrometer-sized sample by the coherent diffractive imaging (CDI) technique based on solid-state harmonics
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Kong, Fanqi. « High-Order Harmonic Generation with Structured Beams ». Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39609.

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The generation of high-order harmonics opened an era of attosecond science wherein coherent light bursts are used to probe dynamic processes in matter with a time resolution short enough to resolve the motions of electrons. It enabled the development of extreme ultraviolet (XUV) and X-ray table-top sources with both temporal and spatial coherence, which provides the ability to shape the temporal and spatial structure of the XUV pulses. Scientists developed techniques to control and measure the temporal structure high harmonic emissions. These techniques exploited control of the driving laser pulse in the time domain and facilitated development of more advanced high-harmonic based XUV sources that have greatly impacted ultrafast measurements. In this thesis, I apply techniques to control and measure the spatial structure of high harmonic emissions, and discuss the underlying physics and potential applications of the interaction between spatially structured laser beams and materials. This study exploits the spatial degree of freedom in strong field interaction, which has not been given as much attention as the temporal degree of freedom. I use liquid crystal devices to shape the wave front of a fundamental laser beam to a vortex structure, then imprint this structured wave front onto XUV beams through high harmonic generation. This method provides an alternative to special XUV optics, which can manipulate the wave front of XUV radiation by all optical means. This result also reveals the conservation of orbital angular momentum in this extreme nonlinear wave mixing process. In addition to shaping the wave front, shaping the polarization of the driving beam also allows generation of circularly polarized the XUV radiation using a high harmonic source. This thesis also highlights the interplay between shaping the wave front and polarization in the high harmonic generation process. The topology of the structured beam can be maintained through this extreme nonlinear interaction due to the spin selection rules and spin-orbit conservation. Moreover, this thesis demonstrates an approach to integrate a vector beam into a broadband ultrafast light source and overcome the bandwidth limitation of mode converters. We use this approach to generate a few-cycle structured beam. In the future, this beam will be used to generate a strong ultrafast magnetic impulse in gas and solid targets by driving currents in a loop, which is a valuable tool for the future of magnetic metrology. The novel properties of structured laser beams discussed in this thesis expanded the capabilities of high harmonic based XUV sources and have opened a new field to explore this additional degree of freedom in strong field interactions.
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Yijian, Meng. « Extreme Ultraviolet Hyperspectral Coherent Diffractive Imaging ». Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/31928.

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We demonstrate hyperspectral imaging using two time-delayed, coherent extreme ultraviolet (XUV) sources. The approach combines broadband XUV high-harmonic generation, holographic imaging, and Fourier transform spectroscopy. The two harmonics sources are spatially separated at generation,and overlap in the far field resulting in a double slit diffraction pattern. We record the two-dimensional intensity modulation as a function of relative time delay; the Fourier transform determines the spatially dependent spectrum. To reduce the delay jitter and improve the spectral resolution, we demonstrate a novel experimental setup that records the relative delay of the two pulses through optical interference. Moreover, we have demonstrated that this broadband approach can be extended to Fourier transform holographic imaging, which avoids extensive phase retrieval computations. Applications include imaging of biological materials near the carbon K-edge.
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Brimhall, Nicole. « Extreme Ultraviolet Polarimetry with Laser-Generated High-Order Harmonics ». Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1926.pdf.

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Goodell, Brian Carpenter, et Brian Carpenter Goodell. « Probing Intracavity Plasma Dynamics with Higher-Order Transverse Modes ». Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/625686.

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Extreme ultraviolet (XUV) frequency combs exhibit promise for enabling high-precision spectroscopic measurements of myriad chemical species for the first time. Coherent XUV radiation can be generated through high harmonic generation (HHG) in femtosecond enhancement cavities. HHG efficiency is limited by nonlinear phase shifts induced by residual intracavity plasma. The goal of this work is to gain insight regarding plasma dynamics in order to allay the detrimental effects of plasma interactions. Our approach is to conduct simulations of cavity pump-probe experiments by probing with higher-order transverse modes. We propose methods for estimating spatial plasma profiles, gas jet velocities, and the plasma recombination coefficient based on measurements of plasma-induced phase shifts. Beam distortion due to plasma interaction is analyzed and used as another reference for plasma dynamics.
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Livres sur le sujet "Higher order harmonics"

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Nahmod, Andrea R. Recent advances in harmonic analysis and partial differential equations : AMS special sessions, March 12-13, 2011, Statesboro, Georgia : the JAMI Conference, March 21-25, 2011, Baltimore, Maryland. Sous la direction de American Mathematical Society et JAMI Conference (2011 : Baltimore, Md.). Providence, Rhode Island : American Mathematical Society, 2012.

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Higher order Fourier analysis. 2012.

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Chapitres de livres sur le sujet "Higher order harmonics"

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Jung, P., et R. Bartussek. « Generation of Higher Harmonics in Noisy Nonlinear Systems ». Dans Fluctuations and Order, 35–52. New York, NY : Springer US, 1996. http://dx.doi.org/10.1007/978-1-4612-3992-5_3.

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Wang, Jierong, et Albert C. S. Chung. « Higher-Order Flux with Spherical Harmonics Transform for Vascular Analysis ». Dans Medical Image Computing and Computer Assisted Intervention – MICCAI 2020, 55–65. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59725-2_6.

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Salières, Pascal. « High-Order Harmonic Generation ». Dans Atoms, Solids, and Plasmas in Super-Intense Laser Fields, 83–97. Boston, MA : Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1351-3_5.

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Lompré, L. A., A. L’Huillier, M. Ferray et G. Mainfray. « Very High Order Harmonic Generation ». Dans Springer Series in Chemical Physics, 96–100. Berlin, Heidelberg : Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-84269-6_30.

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Tarasevitch, Alexander, Clemens Wünsche et Dietrich von der Linde. « High-Order Harmonics from Plasma Surfaces ». Dans Strong Field Laser Physics, 301–19. New York, NY : Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-34755-4_14.

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Meyerhofer, D. D., et J. Peatross. « Angular Distributions of High-Order Harmonics ». Dans Super-Intense Laser-Atom Physics, 19–29. Boston, MA : Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-7963-2_3.

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Lorek, Eleonora, E. W. Larsen, C. M. Heyl, P. Rudawski, M. Miranda, C. Guo, E. Mårsell et al. « High-Order Harmonic Generation and Plasmonics ». Dans NATO Science for Peace and Security Series B : Physics and Biophysics, 531. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9133-5_56.

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Ramos, Germán A., Ramon Costa-Castelló et Josep M. Olm. « Odd-Harmonic High Order Repetitive Control ». Dans Digital Repetitive Control under Varying Frequency Conditions, 37–64. Berlin, Heidelberg : Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37778-5_5.

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Jin, Cheng. « Introduction to High-Order Harmonic Generation ». Dans Springer Theses, 1–23. Cham : Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01625-2_1.

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Erenso, Daniel, Ron Adams, Hua Deng, Reeta Vyas et Surendra Singh. « Higher order photon statistics of intracavity second harmonic generation ». Dans Coherence and Quantum Optics VIII, 513–14. Boston, MA : Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8907-9_144.

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Actes de conférences sur le sujet "Higher order harmonics"

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Moreira, Mariana Geny, Danton Diego Ferreira et Carlos Augusto Duque. « Sub-harmonics detection and identification using higher order statistics ». Dans 2014 16th International Conference on Harmonics and Quality of Power (ICHQP). IEEE, 2014. http://dx.doi.org/10.1109/ichqp.2014.6842750.

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Farhang, Kambiz, et Vinay Ghatti. « A Higher Order Synthesis for Harmonic Motion Generating RSSR Mechanisms ». Dans ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16110.

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Consideration of a mechanism for high-speed application inevitably poses certain kinematic design requirements that can be cast as a function generation synthesis problem involving the entire motion cycle of the mechanism. This paper addresses such application of RSSR four bar mechanisms for high-speed application. It employs a perturbational kinematic analysis of the mechanism to obtain approximate equations relating the follower and input angular displacements. The follower angular motion is derived, approximately, as a linear combination of two simple harmonic functions, in terms of the first and second harmonics of the crank angle. Albeit the exact mathematical description relating the input and output links exists it is not conducive to a kinematic design for dynamic performance. In contrast the approximate equations derived in this paper enable function generation of RSSR four bar mechanisms in which the higher harmonics of the input link are minimized. This utility of the approximate equations are demonstrated through several mechanism design examples.
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Bhosale, Kalyani, Gayathri Pillai et Sheng-Shian Li. « Nonlinearity Driven Higher Order Harmonics in CMOS-MEMS Resonators ». Dans 2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF). IEEE, 2020. http://dx.doi.org/10.1109/ifcs-isaf41089.2020.9234852.

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Nguyen, Thien Minh, et Patrice Wira. « Power grid higher-order harmonics estimation with multilayer perceptrons ». Dans INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2015 (ICCMSE 2015). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4938925.

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Mas-Abellan, P., R. Madrigal et A. Fimia. « Analysis of higher order harmonics with holographic reflection gratings ». Dans SPIE Optics + Optoelectronics, sous la direction de Miroslav Hrabovský, John T. Sheridan et Antonio Fimia. SPIE, 2017. http://dx.doi.org/10.1117/12.2266939.

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Giannakis, Georgios B., et Guotong Zhou. « Retrieving random amplitude modulated harmonics using higher-order statistics ». Dans SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, sous la direction de Franklin T. Luk. SPIE, 1994. http://dx.doi.org/10.1117/12.190830.

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Zhou, Hongjun, Guanjun Wang, Jinjin Zheng, Tonglin Hou et Keqiang Qiu. « Higher order harmonics contribution and suppression in metrology beamline ». Dans Sixth International Symposium on Precision Engineering Measurements and Instrumentation. SPIE, 2010. http://dx.doi.org/10.1117/12.885285.

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Caporal, M., C. Tsingas, M. S. Almubarak et H. Alnasser. « Automated, Inversion-Based Fundamental and Higher Order Harmonics Separation ». Dans 83rd EAGE Annual Conference & Exhibition. European Association of Geoscientists & Engineers, 2022. http://dx.doi.org/10.3997/2214-4609.202210032.

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Moreira, Mariana Geny, Danton Diego Ferreira et Carlos Augusto Duque. « Interharmonic detection and identification based on higher-order statistics ». Dans 2016 17th International Conference on Harmonics and Quality of Power (ICHQP). IEEE, 2016. http://dx.doi.org/10.1109/ichqp.2016.7783431.

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Donahue, Kevin, Yu-Fang Jin, Shuying Zhao, Sara Ahmed et Shan Chen. « Adaptive estimation of higher order harmonics from voltage source inverters ». Dans 2017 4th International Conference on Systems and Informatics (ICSAI). IEEE, 2017. http://dx.doi.org/10.1109/icsai.2017.8248402.

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Rapports d'organisations sur le sujet "Higher order harmonics"

1

Budil, Kimberly Susan. High order harmonic generation in rare gases. Office of Scientific and Technical Information (OSTI), mai 1994. http://dx.doi.org/10.2172/79020.

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T. Khabibouline, N. Solyak et R. Wanzenberg. Higher order modes of a 3rd harmonic cavity with an increased end-cup iris. Office of Scientific and Technical Information (OSTI), mai 2003. http://dx.doi.org/10.2172/810965.

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Lin, Chii Dong. Time-resolved Chemical Imaging of Molecules by High-order Harmonics and Ultrashort Rescattering Electrons. Office of Scientific and Technical Information (OSTI), mars 2016. http://dx.doi.org/10.2172/1242403.

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4

Mahdavian, Farnaz. Germany Country Report. University of Stavanger, février 2022. http://dx.doi.org/10.31265/usps.180.

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Résumé :
Germany is a parliamentary democracy (The Federal Government, 2021) with two politically independent levels of 1) Federal (Bund) and 2) State (Länder or Bundesländer), and has a highly differentiated decentralized system of Government and administration (Deutsche Gesellschaft für Internationale Zusammenarbeit, 2021). The 16 states in Germany have their own government and legislations which means the federal authority has the responsibility of formulating policy, and the states are responsible for implementation (Franzke, 2020). The Federal Government supports the states in dealing with extraordinary danger and the Federal Ministry of the Interior (BMI) supports the states' operations with technology, expertise and other services (Federal Ministry of Interior, Building and Community, 2020). Due to the decentralized system of government, the Federal Government does not have the power to impose pandemic emergency measures. In the beginning of the COVID-19 pandemic, in order to slowdown the spread of coronavirus, on 16 March 2020 the federal and state governments attempted to harmonize joint guidelines, however one month later State governments started to act more independently (Franzke & Kuhlmann, 2021). In Germany, health insurance is compulsory and more than 11% of Germany’s GDP goes into healthcare spending (Federal Statistical Office, 2021). Health related policy at the federal level is the primary responsibility of the Federal Ministry of Health. This ministry supervises institutions dealing with higher level of public health including the Federal Institute for Drugs and Medical Devices (BfArM), the Paul-Ehrlich-Institute (PEI), the Robert Koch Institute (RKI) and the Federal Centre for Health Education (Federal Ministry of Health, 2020). The first German National Pandemic Plan (NPP), published in 2005, comprises two parts. Part one, updated in 2017, provides a framework for the pandemic plans of the states and the implementation plans of the municipalities, and part two, updated in 2016, is the scientific part of the National Pandemic Plan (Robert Koch Institut, 2017). The joint Federal-State working group on pandemic planning was established in 2005. A pandemic plan for German citizens abroad was published by the German Foreign Office on its website in 2005 (Robert Koch Institut, 2017). In 2007, the federal and state Governments, under the joint leadership of the Federal Ministry of the Interior and the Federal Ministry of Health, simulated influenza pandemic exercise called LÜKEX 07, and trained cross-states and cross-department crisis management (Bundesanstalt Technisches Hilfswerk, 2007b). In 2017, within the context of the G20, Germany ran a health emergency simulation exercise with representatives from WHO and the World Bank to prepare for future pandemic events (Federal Ministry of Health et al., 2017). By the beginning of the COVID-19 pandemic, on 27 February 2020, a joint crisis team of the Federal Ministry of the Interior (BMI) and the Federal Ministry of Health (BMG) was established (Die Bundesregierung, 2020a). On 4 March 2020 RKI published a Supplement to the National Pandemic Plan for COVID-19 (Robert Koch Institut, 2020d), and on 28 March 2020, a law for the protection of the population in an epidemic situation of national scope (Infektionsschutzgesetz) came into force (Bundesgesundheitsministerium, 2020b). In the first early phase of the COVID-19 pandemic in 2020, Germany managed to slow down the speed of the outbreak but was less successful in dealing with the second phase. Coronavirus-related information and measures were communicated through various platforms including TV, radio, press conferences, federal and state government official homepages, social media and applications. In mid-March 2020, the federal and state governments implemented extensive measures nationwide for pandemic containment. Step by step, social distancing and shutdowns were enforced by all Federal States, involving closing schools, day-cares and kindergartens, pubs, restaurants, shops, prayer services, borders, and imposing a curfew. To support those affected financially by the pandemic, the German Government provided large economic packages (Bundesministerium der Finanzen, 2020). These measures have adopted to the COVID-19 situation and changed over the pandemic. On 22 April 2020, the clinical trial of the corona vaccine was approved by Paul Ehrlich Institute, and in late December 2020, the distribution of vaccination in Germany and all other EU countries
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