Relevant bibliographies by topics / Low-frequency pulse

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Low-frequency pulse'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Low-frequency pulse"

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Wang, Can, Lilianna E. Christman, Simon L. Klemperer, Jonathan M. Glen, Darcy K. McPhee, and Bin Chen. "Assessment of a claimed ultra-low frequency electromagnetic (ULFEM) earthquake precursor." Geophysical Journal International 229, no. 3 (2021): 2081–95. http://dx.doi.org/10.1093/gji/ggab530.

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SUMMARY The rate of occurrence of anomalous ultra-low frequency electromagnetic (ULFEM) pulses has been claimed to have increased days to weeks prior to the M5.4 2007 and M4.0 2010 Alum Rock earthquakes. We re-examine the previously reported ultra-low frequency (ULF: 0.01–10 Hz) magnetic data recorded at a QuakeFinder site located 9 km from the earthquake hypocentre, and compare to data from a nearby Stanford-USGS site located 42 km from the hypocentre, to analyse the characteristics of the pulses and assess their origin. Using pulse definitions and pulse-counting algorithms analogous to those
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Jiang Pei-heng, Shi Chao-du, Fu Shi-jie та ін. "130 μJ linear-polarized single-frequency 12-μm-core Er/Yb co-doped fiber amplifier based on pre-shaped seed pulse". Acta Physica Sinica 74, № 2 (2025): 0. https://doi.org/10.7498/aps.74.20241371.

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Stimulated Brillouin scattering (SBS) is the major barrier in the process of energy scaling for pulsed single-frequency fiber MOPA. Due to gain saturation effect, the laser pulse profile will be gradually distorted with the increase of pump power, which induces steep leading edge and narrower width for the amplified pulses. The resulting laser peak power would increase rapidly and thus the SBS threshold is reached earlier to limit the amplification of pulse energy.<br>A method to obtain high-energy pulsed single-frequency laser by pulse pre-shaping is demonstrated in this work. By design
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Zhou, Guangqi, Ye Tian, Feng Shi, et al. "Low-Energy Pulsed Ion Beam Technology with Ultra-High Material Removal Resolution and Widely Adjustable Removal Efficiency." Micromachines 12, no. 11 (2021): 1370. http://dx.doi.org/10.3390/mi12111370.

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High-precision optical component manufacturing by ion beam machining tools with ultra-high material removal resolution and dynamically adjustable removal efficiency is important in various industries. In this paper, we propose a low-energy pulsed ion beam (LPIB) technology that can obtain a single pulse with high-resolution material removal by adjusting the pulse frequency and duty cycle, and enable the dynamic adjustment of the removal efficiency. The pulse frequency is 1–100 Hz, and the duty cycle is 0–100%. For monocrystalline silicon, the pulse frequency and duty cycle are set to 100 Hz an
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Peng Zhang, Peng Zhang, Xuechun Li Xuechun Li, Youen Jiang Youen Jiang, and Guoyang Li Guoyang Li. "Automatic polarization compensation method for low-repetition frequency short optical pulse." Chinese Optics Letters 10, no. 1 (2012): 010602–10605. http://dx.doi.org/10.3788/col201210.010602.

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Ma, Li Ping, Zhi Qiang Liang, Xi Bin Wang, Wen Xiang Zhao, Tian Feng Zhou, and Hong Min Yao. "Effect of Low-Frequency Pulsed Magnetic Treatment on Micro-Hardness of High Speed Steel." Advanced Materials Research 797 (September 2013): 663–66. http://dx.doi.org/10.4028/www.scientific.net/amr.797.663.

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The effect of low-frequency pulsed magnetic treatment on micro-hardness of W9Mo3Cr4V(W9) high speed steel (HSS) has been investigated. A low-frequency pulsed magnetic treatment system was designed and applied to treat the tool material. Experiments were conducted at different magnetic field intensities and pulse frequencies. Experimental results show that the low-frequency pulsed magnetic treatment can effectively increase the micro-hardness of W9 HSS in a proper treatment parameters. The micro-hardness change rate first increase and then stabilize as the magnetic field intensity increases. Pu
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Riemann, Stephanie, Cornelia Helbing, and Frank Angenstein. "From unspecific to adjusted, how the BOLD response in the rat hippocampus develops during consecutive stimulations." Journal of Cerebral Blood Flow & Metabolism 37, no. 2 (2016): 590–604. http://dx.doi.org/10.1177/0271678x16634715.

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To determine the possibility to deconvolve measured BOLD responses to neuronal signals, the rat perforant pathway was electrically stimulated with 10 related stimulation protocols. All stimulation protocols were composed of low-frequency pulse sequences with superimposed high-frequency pulse bursts. Because high-frequency pulse bursts trigger only one synchronized spiking of granular cells, variations of the stimulation protocol were used: (a) to keep the spiking activity similar during the presentation of different numbers of pulses, (b) to apply identical numbers of pulses to induce differen
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Jones, G. "Scaling of echolocation call parameters in bats." Journal of Experimental Biology 202, no. 23 (1999): 3359–67. http://dx.doi.org/10.1242/jeb.202.23.3359.

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I investigated the scaling of echolocation call parameters (frequency, duration and repetition rate) in bats in a functional context. Low-duty-cycle bats operate with search phase cycles of usually less than 20 %. They process echoes in the time domain and are therefore intolerant of pulse-echo overlap. High-duty-cycle (>30 %) species use Doppler shift compensation, and they separate pulse and echo in the frequency domain. Call frequency scales negatively with body mass in at least five bat families. Pulse duration scales positively with mass in low-duty-cycle quasi-constant-frequency (
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Wang, W. M., Z. M. Sheng, and J. Zhang. "Electron injection into laser wakefields by colliding circularly-polarized laser pulses." Laser and Particle Beams 27, no. 1 (2009): 3–7. http://dx.doi.org/10.1017/s0263034609000019.

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AbstractElectron injection into a laser wakefield by the colliding of two circularly polarized laser pulses is analyzed by the Hamiltonian approach and particle-in-cell simulations. If the pump pulse driving the laser wakefield is right-circularly-polarized, electron injection is found only when the counter-propagating injection pulse is left-circularly-polarized and vice versa. This holds when the injection pulse is at low intensity and has a frequency near the pump pulse frequency ω0. For a moderately intense injection pulse, even if the two pulses have the same polarization, electron inject
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Xie, Xiao Hua, Quan Zhou, Cheng Bo Xiao, and Xin Tang. "Effect of Low-Voltage Pulsed Magnetic Field on Solidified Structure of Superalloy K4169." Applied Mechanics and Materials 423-426 (September 2013): 725–29. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.725.

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Effects of different pulse voltage and frequency on solidified structure of superalloy K4169 under low-voltage pulsed magnetic field (LVPMF) were investigated in this paper, and the related mechanism was also discussed. The experimental results show that grain of superalloy K4169 can be refined greatly by LVPMF treatment during the course of solidification. Growth of dendrite is restrained and primary grain is changed from large dendrites to smaller equiaxed grains. When the pulse voltage is at 0-280V, grain size of the alloy decreases as pulse voltage increases, and primary dendrites are frac
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Jones, Gareth. "Scaling of echolocation call parameters in bats." Journal of Experimental Biology 202, no. 23 (1999): 3359–67. https://doi.org/10.5281/zenodo.13474226.

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(Uploaded by Plazi for the Bat Literature Project) I investigated the scaling of echolocation call parameters pulses when detecting distant targets. There is probably a (frequency, duration and repetition rate) in bats in a trade-off between call intensity and repetition rate because functional context. Low-duty-cycle bats operate with 'whispering' bats (and hipposiderids) produce several calls search phase cycles of usually less than 20 %. They process per predicted wingbeat and because batches of calls are echoes in the time domain and are therefore intolerant of emitted per wingbeat during
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Dissertations / Theses on the topic "Low-frequency pulse"

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Langrock, Carsten. "Classical and low-light-level detection and pulse characterization using optical-frequency mixers /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Hampus, Carlsson, and Öhlund Martina. "LOW COST ULTRA WIDEBANDRADAR FOR HUMAN PROTECTION." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-28359.

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The majority of the UWB radars available on the market today are expensive and often closed forfurther development due to proprietary rights. Therefore it is difficult to fully understand and adaptthe functionality of an available UWB system to fit one’s needs. The consulting-firm Addiva purchasedan UWB radar to be used in a safety system. However, the radar had limitations and the functionalityof it was partly unknown. This master thesis was inspired from this issue to examine the possibilitiesof developing a low-cost UWB radar, with main focus on research of human detection. The systemshould
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Cassidy, Brian Michael. "A Constant ON-Time 3-Level Buck Converter for Low Power Applications." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/73211.

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Smart cameras operate mostly in sleep mode, which is light load for power supplies. Typical buck converter applications have low efficiency under the light load condition, primarily from their power stage and control being optimized for heavy load. The battery life of a smart camera can be extended through improvement of the light load efficiency of the buck converter. This thesis research investigated the first stage converter of a car black box to provide power to a microprocessor, camera, and several other peripherals. The input voltage of the converter is 12 V, and the output voltage is 5
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Hung, Ching-Sui. "Effects of pulse-modulated microwave radiation from mobile phones on the sleep/waking EEG and psychomotor vigilance." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/15747.

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This study employed multiple assessments, including sleep/resting waking EEG (visual scoring and power spectral analysis) and psychomotor vigilance task, to access effects of varying pulse-modulated microwaves (such as: 'talk', 'listen' and 'standby' mode signals) emitted from a standard mobile phone. The idea was prompted by a finding that the pulse modulation frequencies of mobile phone signals correspond to the frequencies of brain delta and alpha waves. Thereby it is possible the brain is able to recognize and respond to the low-frequency components of the mobile phone signals. Supporting
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Fakhfakh, Seifeddine. "Nouvelles méthodes de caractérisation et de modélisation non-linéaire électrothermique des effets de piège dans la technologie HEMT GaN pour l’étude de la stabilité pulse à pulse dans les applications radar." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0103/document.

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La capacité d’un émetteur radar à assurer la bonne détection des cibles mouvantes sans générer de fausses alertes dépend principalement de sa stabilité pulse à pulse qui est affectée par de nombreux facteurs tels que les effets mécaniques, thermiques et électriques. Cependant, la stabilité pulse à pulse d’un émetteur radar à impulsions est liée à celle de ses amplificateurs de puissance, et plus particulièrement à la technologie des dispositifs actifs. Dans ce sens, ce travail présente une analyse de ce critère radar au plus près du composant (au niveau d’un transistor HEMT GaN) dans le cas d’
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Abu-Shikhah, Nazih M. "New methods in speech enhancement, and modelling, with applications to low bit rate speech coding." Thesis, Queensland University of Technology, 2001.

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Kirkconnell, Carl Scott. "Numerical analysis of the mass flow and thermal behavior in high-frequency pulse tubes." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/16434.

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Deshpande, Kshitija Bharat. "A Dedicated Search for Low Frequency Radio Transient Astrophysical Events using ETA." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/35666.

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Astrophysical phenomena such as self-annihilation of primordial black holes (PBHs), gamma ray bursts (GRBs), and supernovae are expected to produce single dispersed pulses detectable in the low end of the radio spectrum. Analysis of these pulses could provide valuable information about the sources, and the surrounding and intervening medium. The Eight-meter-wavelength Transient Array (ETA) is a radio telescope dedicated to the search for these pulses in an 18 MHz bandwidth centered at 38 MHz. ETA consists of 10 dual-polarized active dipoles providing an all-sky field of view. This thesis descr
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Yeago, Taylor Craig. "A Two-Phase Buck Converter with Optimum Phase Selection for Low Power Applications." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51230.

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Power consumption of smart cameras varies significantly between sleep mode and active mode, and a smart camera operates in sleep mode for 80 — 90% of time for typical use. To prolong the battery life of smart cameras, it is essential to increase the power converter efficiency for light load, while being able to manage heavy load. The power stage of traditional buck converter is optimized for maximum load, at the cost of light-load efficiency. Wei proposed a multiphase buck converter incorporating the baby-buck concept and optimum number of phases (ONP) control. This thesis research investigate
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Pumarica, Julio César Saldaña. "Projeto de modelos neurais pulsados em CMOS." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-01032011-115940/.

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O presente trabalho descreve o projeto de modelos neurais pulsados em tecnologia CMOS. Foram projetados dois modelos: um neurônio baseado em condutâncias e um neurônio do tipo integra e dispara. O primeiro gera impulsos elétricos similares aos potenciais de ação gerados pelo neurônio biológico. Mediante simulação, foram observadas as seguintes características: disparo do impulso quando se atinge a tensão de limiar, hiperpolarização após o potencial de ação, retorno passivo à tensão de repouso, presença de período refratário e relação sigmoide entre a frequência de disparo e a intensidade do es
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Book chapters on the topic "Low-frequency pulse"

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Ravex, A., J. M. Poncet, I. Charles, and P. Bleuzé. "Development of Low Frequency Pulse Tube Refrigerators." In Advances in Cryogenic Engineering. Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9047-4_247.

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Poncet, J. M., I. Charles, A. Gauthier, and T. Trollier. "Low Temperature High Frequency Pulse Tube Cooler Using Precooling." In Cryocoolers 13. Springer US, 2005. http://dx.doi.org/10.1007/0-387-27533-9_21.

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Vogel, M. H. "Design of the Low-Frequency Compensation of an Extreme-Bandwidth TEM Horn and Lens IRA." In Ultra-Wideband, Short-Pulse Electromagnetics 3. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-6896-1_13.

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Tillman, Karl A., Derryck T. Reid, D. Artigas, J. Hellström, V. Pasiskevicius, and F. Laurell. "Low Threshold, High Repetition Frequency, Femtosecond Optical Parametric Oscillator Based on Chirped-Pulse Frequency Conversion." In Springer Series in OPTICAL SCIENCES. Springer New York, 2004. http://dx.doi.org/10.1007/978-0-387-34756-1_49.

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Maeda, Akihide, and Takehiko Kobayashi. "An Omnidirectional and Low-VSWR Ultra Wideband Antenna for a Frequency Band of 6 to 40 GHz." In Ultra-Wideband Short-Pulse Electromagnetics 8. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-73046-2_6.

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Xu, Tingting, Xiaorui Hu, Aihua Tang, and Peng Gong. "Analysis of Pulse and Alternating Current Low Temperature Charging Based on Optimal Charging Frequency." In The Proceedings of the 5th International Conference on Energy Storage and Intelligent Vehicles (ICEIV 2022). Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1027-4_40.

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Xie, Huangsheng, Zhihe Fu, Jiaxiang Xue, Li Jin, and Min Xu. "Effect of Low-Frequency Pulse Modulation on Microstructure and Mechanical Properties of Aluminum Alloy Joints." In Transactions on Intelligent Welding Manufacturing. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-8192-8_8.

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Liu, Yiyang, Weichao Li, Liang Zhou, and Jinyang Han. "Chopping Compensation Control and Low Frequency Pulse Suppression Strategy of DC Side Current in Lithium Battery Energy Storage System." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1064-5_58.

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Cheng, Yuan, Haodan Shao, Mingli Wang, and Xiaojun Liu. "Research on Low-Frequency AC Excitation Control of Capacitor Charging and Discharging System Based on Brushless Doubly Fed Pulse Generator." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-1391-5_26.

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Moortgat, Peter, Mieke Anthonissen, Ulrike Van Daele, Jill Meirte, Tine Vanhullebusch, and Koen Maertens. "Shock Wave Therapy for Wound Healing and Scar Treatment." In Textbook on Scar Management. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44766-3_55.

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AbstractShock Wave Therapy (SWT) meets all the requirements for the ideal non-invasive scar treatment. It is safe, well tolerated by patients, cost-effective, easy to apply, has low complication rates, and can be used in an outpatient setting. The overall effect of SWT is an improvement of tissue homeostasis, accompanied by an improvement of the tissue self-healing abilities, and it seems to focus on inducing tissue regeneration and matrix remodeling in vivo by means of mechanotransduction.SWT has a beneficial effect on wound healing and is characterized by an upregulation of the angio-active
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Conference papers on the topic "Low-frequency pulse"

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Hu, Jianjian, Wu Chen, Zhan Shen, and Jianfei Sun. "A Two-Stage rTMS Pulse Generation Circuit with High-Current and Low-Frequency." In 2024 CPSS & IEEE International Symposium on Energy Storage and Conversion (ISESC). IEEE, 2024. https://doi.org/10.1109/isesc63657.2024.10785347.

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Zou, Jinbo. "Controller design of bidirectional Buck-Boost converter for low frequency pulse power supply." In 2025 4th International Conference on Smart Grid and Green Energy (ICSGGE). IEEE, 2025. https://doi.org/10.1109/icsgge64667.2025.10984657.

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Karunakaran, Anamika nair, Angelo Manetta, Poul Varming, et al. "Reducing Frequency Noise in Dark-Pulse Kerr Combs." In CLEO: Science and Innovations. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_si.2024.sw3f.3.

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This paper investigates the impact of pump-resonance detuning on various soliton properties in dual ring microresonators. Bandwidth, conversion efficiency, repetition frequency, spectral envelope and comb line noise are characterised and low noise states are identified.
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Lompe, Thomas, Phillip Woschnik, Kerstin Schlichting, et al. ">1.5 Octave-broad Optical Frequency Comb for Multi-clock Comparisons and Wide-band Spectral Purity Transfer." In CLEO: Science and Innovations. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_si.2024.sm2g.5.

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We present a system composed of an Er:laser-based ultra-low-noise frequency comb seeding a custom-designed photonic-crystal fiber with 2nJ pulse energies. A super-continuum is obtained spanning from 650nm to 2µm. System qualifications will be presented.
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Манульчев, Д. С. "ENERGY PROPAGATION OF THE LOW-FREQUENCY PULSE ENERGY IN VITYAZ BAY." In Физики геосфер. Crossref, 2020. http://dx.doi.org/10.35976/poi.2020.30.21.008.

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Представлены результаты натурных исследований распространения низкочастотного акустического импульсного сигнала в бухте Витязь, Японское море. Измерения были проведены с помощью цифровых радиогидроакустических буев и импульсного пневмоизлучателя, свешиваемого с борта катера. Показано, что на трассе длиной 2,2 км со средней глубиной 30 м формируется сигнал в виде двух импульсов с соизмеримыми амплитудами и с задержкой 0,19 с, что, по-видимому, связано с наличием накопленного в бухте осадочного слоя. Данное предположение подтверждается численным моделированием путем введения в модельный волновод
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Dwivedi, Amit Krishna, Rishab Mehra, Sarika Tyagi, and Aminul Islam. "A Compact Low Power High Frequency Pulse Generator." In 2015 Fifth International Conference on Communication Systems and Network Technologies (CSNT). IEEE, 2015. http://dx.doi.org/10.1109/csnt.2015.159.

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Bugay, Aleksandr N., Sergey V. Sazonov, and Anatoly P. Sukhorukov. "On nonlinear reflection of optical pulse from low-frequency few cycle pulse." In ICONO 2010. SPIE, 2010. http://dx.doi.org/10.1117/12.880954.

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Burke, William, and David Auslander. "Low-Frequency Pulse Width Modulation Design for HVAC Compressors." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87611.

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This paper discusses the design of low-frequency pulse width modulation for heating ventilation and air conditioning (HVAC) compressors. HVAC units are traditionally controlled using nonlinear control techniques like hysteresis control. Using a very long pulse width, this method can treat an on/off air conditioner or heat pump compressor as a variable input for which traditional linear (or nonlinear) controls can be applied. The key advantage of this method is direct control over the compressor power using tunable saturation. Power control is especially useful when considering load management
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Ohno, Masashi, Shokei Numamoto, Mitsuru Shinagawa, et al. "Low-Frequency Analysis of Shielding Effectiveness Using Pulse Waveform." In 2018 IEEE 7th Global Conference on Consumer Electronics (GCCE). IEEE, 2018. http://dx.doi.org/10.1109/gcce.2018.8574709.

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Ronen, Shuki, and Steve Chelminski. "Tuned Pulse Source -- a new low frequency seismi source." In SEG Technical Program Expanded Abstracts 2017. Society of Exploration Geophysicists, 2017. http://dx.doi.org/10.1190/segam2017-w16-04.1.

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Reports on the topic "Low-frequency pulse"

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Sweeney, J. Low Frequency Electromagnetic Pulse and Explosions. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1030215.

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Wolfson, Michael. Semiclassical Investigation of Low Frequency, Long Range Acoustic Pulse Propagation in Deep Ocean Environments. Defense Technical Information Center, 1999. http://dx.doi.org/10.21236/ada630175.

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Schartau, Markus, Tronje Peer Kemena, Vanessa Lampe, Jan Taucher, and Miriam Seifert. New/refined parameterizations for modelling ocean alkalinization effects on biogeochemistry and plankton dynamics. OceanNets, 2024. http://dx.doi.org/10.3289/oceannets_d5.8.

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In this report the potential effects of pulsed ocean alkalinity enhancement (OAE) on plankton growth dynamics, efficacy and carbon dioxide removal (CDR) are simulated at an oligotrophic site nearby the Canary Islands (Spain). Parameterizations of how phytoplankton and bacterial growth respond to variations in carbonate chemistry are introduced and applied. The model resolves vertical profiles within a 420 km2 area of OAE, and within a 2.05×105 km2 surrounding region. Both areas are connected and lateral dispersion causes a horizontal exchange of chemical and biological tracers. The analysis co
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Lee, Wall, and Burch. L52333 NDE and Inspection Techniques Applied to Composite Wrap Repairs. Pipeline Research Council International, Inc. (PRCI), 2012. http://dx.doi.org/10.55274/r0010468.

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The objective includes: Assess commercially available inspection methods to validate integrity of composite repair systems. Identify applicability to inspect composite overwrap and parent metal for both onshore and sub-sea pipelines (where information is available). Identify sources of data to include other users of composite materials(aerospace/aircraft, naval/ship repairs). Identify procedures and technologies to assess inspection effectiveness and provide a gap analysis. Interface with other PRCI projects on long-term testing of composite repairs and other joint industry projects on composi
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Monetary Policy Report, January 2024. Banco de la República, 2024. http://dx.doi.org/10.32468/inf-pol-mont-eng.tr1-2024.

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Inflation continues to decline but remains well above 3%. It is anticipated to decrease significantly in 2024 and draw closer to the established target in the first half of 2025. The ongoing moderation in the economy's price levels is evidenced by the decline in headline inflation from 11% to 9.3% between September and December 2023. A noteworthy contributor to the decrease in inflation has been the reduction of food prices adjustments throughout 2023, complemented by favorable trends in the price of goods. The decrease in inflation has, however, been constrained by the behavior of the price o
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