Showing 281 - 300 results of 848 for search '"high frequency"', query time: 0.05s Refine Results
  1. 281

    Design of an Impulse Radiating Antenna Using a Curved TEM-Wire Fed Parabola by Donghyun Lee, Haengseon Lee, Sunmook Hwang, Jaewoon Ahn

    Published 2012-01-01
    “…It is also found that wire separation near the focal point limits the high frequency directivity.…”
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  2. 282

    DOA Estimation Performance Analysis and Verification of Dual Crossed-Loop/Monopole Antenna Array by Sijie Wang, Biyang Wen, Yingwei Tian

    Published 2019-01-01
    “…The compact high-frequency surface wave radar using a crossed-loop/monopole (CLM) antenna as the receiving sensor has been widely used in ocean remote sensing and target monitoring. …”
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    Article
  3. 283

    Adaptive Heterogeneous Autoregressive Models of Realized Volatility Based on a Genetic Algorithm by Hui Qu, Ping Ji

    Published 2014-01-01
    “…The heterogeneous autoregressive (HAR) models of high-frequency realized volatility are inspired by the Heterogeneous Market Hypothesis and incorporate daily, weekly and monthly realized volatilities in the volatility dynamics with a (1,5,22) time horizon structure. …”
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  4. 284

    Ventricular Tachycardia Originating from Moderator Band: New Perspective on Catheter Ablation by Jin-yi Li, Jing-bo Jiang, Yan He, Jian-chun Luo, Guo-qiang Zhong

    Published 2017-01-01
    “…Electroanatomic mapping revealed a complex fractionated, high frequency potential with long duration preceding the QRS onset of the IVT. …”
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    Article
  5. 285

    Prevalence of Oral Lesions Biopsies Among Different Laboratories by Layla Muhamad

    Published 2024-12-01
    “…Conclusions: The results showed a high frequency of malignant tumors, which need more evaluation of etiological factors. …”
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    Article
  6. 286

    Development of an Autonomous Endoscopically Implantable Submucosal Microdevice Capable of Neurostimulation in the Gastrointestinal Tract by J. Hajer, M. Novák

    Published 2017-01-01
    “…It is known that the application of high-frequency low-energetic stimulation can help to effectively moderate and alleviate the symptoms of gastric dysmotility. …”
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    Article
  7. 287

    Spondylodiscitis Occurring after Diagnostic Lumbar Puncture: A Case Report by Mehmet Sabri Gürbüz, Mehmet Zafer Berkman

    Published 2013-01-01
    “…However, the diagnosis is often delayed due to the rarity and insidious onset of the disease usually presenting with low back pain which has a high frequency in the society. If it is diagnosed early before development of an abscess requiring surgery or neurological deficit, it responds to antimicrobial therapy quite well. …”
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  8. 288

    Stability and Complexity Analysis of Temperature Index Model Considering Stochastic Perturbation by Jing Wang

    Published 2018-01-01
    “…Stochastic factors do not usually change the trend in temperature, but they can cause high frequency fluctuations in the process of temperature evolution. …”
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  9. 289

    Worldwide variations in the knowledge and use of fluoroscopy during percutaneous nephrolithotomy—should we do better? A survey by the European Association of Urology Section for Ur... by Otaš Durutovic, Guohua Zeng, Bhaskar Somani, Simon Choong, Giorgio Mazzon, Di Gu, Zeeshan Hameed, TP Rajeev, Bogomir Milojevic, Davide Brusa, Tiago Ribeiro Oliveira, Sergio Pereira, Nariman Gadzhiev, Ali Serdar Gozen, Evangelos Liatsikos, Panagiotis Kallidonis, Uros Bumbasirevic, Andreas Skolarikos

    Published 2025-01-01
    “…Precautions to reduce exposure appeared poorly followed as up to 25.4% of respondents used regularly continuous fluoroscopy, and up to 20.5% used regularly high-frequency setting and this trend was more obvious among senior specialists (6.2% of trainees used high-frequency settings vs. 21.3% of consultants, p<0.05). …”
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  10. 290

    Pneumoperitoneum without Intestinal Perforation in a Neonate: Case Report and Literature Review by Prabhavathi Gummalla, Gratias Mundakel, Maksim Agaronov, Haesoon Lee

    Published 2017-01-01
    “…We report a case of pneumoperitoneum with no intestinal perforation in a preterm neonate with respiratory distress syndrome who was on high frequency oscillatory ventilation (HFOV). He developed bilateral pulmonary interstitial emphysema with localized cystic lesion, likely localized pulmonary interstitial emphysema, and recurrent pneumothoraces. …”
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    Article
  11. 291

    Experimental and Numerical Investigation of Acoustic Performance for Full-Sized SPS by Yu Gao, Kun Liu, Wenan Jiang, Yubin Fang

    Published 2022-01-01
    “…Furthermore, in the medium- and high-frequency domain, the main factors affecting the sound insulation were different in the different frequency ranges, and the frequency range should be considered during the design of the structure. …”
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  12. 292

    Study on the Detectability of the Sky-Surface Wave Hybrid Radar by Hou Chengyu, Ke Guo, Shi Tiange, Wang Yuxin

    Published 2014-01-01
    “…Working in the HF (high-frequency) band and the transmitter and receiver locating separately, the sky-surface wave hybrid radar both has the capabilities of the OTHR (over-the-horizon radar) and the advantage of the bistatic radar. …”
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  13. 293

    A Novel Method for Preparation of Zn-Doped CuInS2 Solar Cells and Their Photovoltaic Performance by Cheng-Hsiung Peng, Chyi-Ching Hwang

    Published 2013-01-01
    “…In this study, a novel method was proposed to synthesize high quality Zn-doped CuInS2 nanocrystals under high frequency magnetic field at ambient conditions. The magnetic Zn-doping gave superparamagnetic heating of the resulting nanocrystals via magnetic induction, causing an accelerating growth rate of the doped CuInS2 under ambient conditions faster than conventional autoclave synthesis. …”
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  14. 294

    An Experimental In Vivo Model to Characterize “Heavy Legs” Symptom in Topical Formulations by Pedro Contreiras Pinto, Luís Monteiro Rodrigues

    Published 2009-01-01
    “…Local blood flow records were obtained instantaneously and during postural change with a laser doppler flowmeter (LDF). High-frequency sonography and local morphometry were also obtained at Days 0, 14, and 28. …”
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  15. 295

    A Note on Directional Wavelet Transform: Distributional Boundary Values and Analytic Wavefront Sets by Felipe A. Apolonio, Daniel H. T. Franco, Fábio N. Fagundes

    Published 2012-01-01
    “…Moreover, we show that for a given distribution f∈𝒮′(ℝn), the continuous wavelet transform of f with respect to a conical wavelet is defined in such a way that the directional wavelet transform of f yields a function on phase space whose high-frequency singularities are precisely the elements in the analytic wavefront set of f.…”
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  16. 296

    Ou comme ça, machin et autres marqueurs d’indétermination dans les listes by Marie-José Béguelin, Gilles Corminboeuf

    Published 2017-09-01
    “…On the one hand, we study the sequence ou comme ça (“or like that”), whose high frequency seems to be characteristic of the OFROM corpus. …”
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  17. 297

    A Double-Boost Converter Based on Coupled Inductance and Magnetic Integration by Hongzhu Li, Ling Zhu, Le Wang

    Published 2021-01-01
    “…High-voltage gain converter has a high-frequency use in some industrial fields, for instance, the fuel cell system, the photovoltaic system, electric vehicles, and the high-intensity discharge lamp. …”
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  18. 298

    Focal Mechanisms of Mw 6.3 Aftershocks from Waveform Inversions, Phayao Fault Zone, Northern Thailand by Kasemsak Saetang

    Published 2017-01-01
    “…Band-pass filtering in the range of 0.03–0.15 Hz was selected for reducing low- and high-frequency noise. Source positions were created by using a single-source inversion and a grid-search method computed to optimize the waveform match. …”
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  19. 299

    Realized Jump Risk and Equity Return in China by Guojin Chen, Xiaoqun Liu, Peilin Hsieh, Xiangqin Zhao

    Published 2014-01-01
    “…After estimating daily realized jumps from high-frequency transaction data of the Chinese A-share stocks, we calculate monthly jump size, monthly jump standard deviation, and monthly jump arrival rate and then use those monthly jump factors to explain the return of the following month. …”
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  20. 300

    A Novel Nonlinear LPDA Design for HF Direction Finding by Xiaofei Ren, Hu Li, Shuxi Gong

    Published 2019-01-01
    “…A novel design of log-periodic dipole array (LPDA) for high-frequency direction finding (DF) is presented. The traditional Carrel method employs fixed values of scale factor and spacing factors in LPDA designs. …”
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