Analysis of Vibroacoustic Modulations for Crack Detection: A Time-Frequency Approach Based on Zhao-Atlas-Marks Distribution by A. Trochidis, L. Hadjileontiadis, K. Zacharias

“…The VAM method is based on the effect of modulation of high-frequency acoustic waves by a low-frequency vibration. …”
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Nonlocal Electron-Phonon Interaction as a Source of Dynamic Charge Stripes in the Cuprates by Claus Falter, Thomas Bauer

“…The investigation is performed for the anomalous high-frequency oxygen bond-stretching modes, which experimentally are known to display a strong softening of the frequencies upon doping in the cuprates. …”
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Incompressible limit for the compressible viscoelastic fluids in critical space by Han Bin, Wu Dan

“…The proof relies on the dispersive property of the linear system on the high-frequency regime and the parabolic property on the low-frequency regime. …”
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Volatility Risk Premium, Return Predictability, and ESG Sentiment: Evidence from China’s Spots and Options’ Markets by Zhaohua Liu, Susheng Wang, Siyi Liu, Haixu Yu, He Wang

“…Based on the SSE 50 ETF 5-minute high-frequency spots and daily options data from 2016 to 2021, we adopt nonparametric model-free approaches to calculate realized and implied volatilities. …”
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Analysis of Cavitation Instabilities in a Four-Blade Inducer by O. Coutier-Delgosha, A. Dazin, G. Caignaert, G. Bois

“…Therefore, wavelet decomposition, flow visualizations, and direct analysis of the high-frequency force, moment, and pressure signals are applied. …”
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Estimating Target Heights Based on the Earth Curvature Model and Micromultipath Effect in Skywave OTH Radar by Hou Chengyu, Wang Yuxin, Chen Jiawei

“…They exploit skywave propagation reflection of high frequency signals from the ionosphere, which provides the ultra-long-range surveillance capabilities to detect and track maneuvering targets. …”
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Maple leaf-based triboelectric nanogenerator for efficient energy harvesting and precision monitoring in ping-pong training by He Yu, Zheng Li

“…Tested with a ping-pong paddle, the ML-TENG generates consistent voltage even under high-frequency impacts, demonstrating its sensitivity to both strong and weak forces. …”
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Radio and Clutter Suppression Algorithm Based on Spatial Multiple Beams for Small-Aperture HFSWR by Di Yao, Xin Zhang, Qiang Yang, Weibo Deng

“…Radio and clutter that cover a certain number of range-Doppler-angle cells have a major impact on the detection performance of a high-frequency surface wave radar (HFSWR) system. Especially for a small-aperture array, the angle spectrums of radio and clutter suffer from severe broadening, so the targets that are more easily submerged in the broadened radio and clutter can be hardly detected. …”
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Neural Network L1 Adaptive Control of MIMO Systems with Nonlinear Uncertainty by Hong-tao Zhen, Xiao-hui Qi, Jie Li, Qing-min Tian

“…In this architecture, a low-pass filter is adopted to guarantee fast adaptive rate without generating high-frequency oscillations in control signals. The auxiliary compensation controller is designed to approximate the unknown nonlinear functions by MIMO RBF neural networks to suppress the influence of uncertainties. …”
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Damage Evolution of Granite under Ultrasonic Vibration with Different Amplitudes by Junpeng Han, Dajun Zhao, Shulei Zhang, Yu Zhou

“…As a type of ultra-high frequency loading, ultrasonic vibration is an effective way to break the rock at high rates. …”
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Aeroelastic Flutter and Sliding Mode Control of Wind Turbine Blade by Lin Chang, Yingjie Yu, Tingrui Liu

“…The results show that a better control effect can be achieved on the premise of the design of the precise parameters of the controller: the proposed sliding mode control algorithm based on LMI can effectively act on the aeroelastic system of the blade, significantly reduce the vibration frequency, and make the aeroelastic system converge to an acceptable static difference in a short time, which proves the effectiveness of sliding mode control in suppressing high-frequency vibration under high wind speed.…”
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Multi‐port medium‐frequency PET topology for integrating photovoltaic generation with battery storage by Xuejiao Li, Mingyan Wang, Bingda Zhu, Chuang Liu

“…Finally, the PET only uses a single medium‐frequency transformer for voltage regulation and electrical isolation, so that it can avoid the use of DC capacitors in the traditional line/high‐frequency transformers, reduce the PET volume and its costs, as well as simplify the control strategy. …”
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Systematics of means of vibration isolation in technogenic systems by P. D. Balakin

“…Vibrations of small amplitude and high frequency are called vibrations, the weakening or elimination of which form a system of vibration protection of machines, part of which is vibration isolation. …”
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Recognition of life-threatening arrhythmias by ECG scalograms by A.P. Nemirko, A.S. Ba Mahel, L.A. Manilo

“…Especially dangerous are ventricular fibrillation and high-frequency heartbeat ventricular tachycardia. Timely detection of these dangerous disorders in the clinic allows doctors to effectively use electrical defibrillation, which saves the patient's life. …”
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Challenges and Innovations in CMOS-Based 300-GHz Transceivers for High-Speed Wireless Communication by Minoru Fujishima

“…This article discusses the challenges of implementing CMOS transceivers at such high frequencies, focusing on power amplification, phased array architectures, and low-power, high-speed demodulation circuits. …”
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Monoclonal Gammopathy of Renal Significance with Progression to Multiple Myeloma in a Patient with ASIA-MO Syndrome by David Alejandro Vargas Gutiérrez, Karina Ivonne Arias Callejas, Edwin Pavel Palacios Ruiz, Priscila Joseline Pérez Vinueza, Juan Diego Muñoz Vega, Ana Karen G. Mejía Geraldo, Ingrid Salinas Zaldívar

“…Autoimmune/inflammatory syndrome induced by adjuvants is a disease associated with an unregulated hyperactivity of the immune system and may also be associated with a high frequency of hematologic malignancies. Report. This is a case of a female with ASIA-MO syndrome secondary to infiltration of mineral oil for aesthetic purposes and presented with multiple episodes of urolithiasis resulting in renal impairment of her left kidney confirmed by scintigraphy and ending in unilateral nephrectomy. …”
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Modern concept of treatment of biliary peritonitis complicated by abdominal sepsis (<i>Review of the literature</i>) by O. A. Tereshchenko, A. A. Botashev, Yu. V. Pomeschik, E. A. Petrosyan, V. I. Sergiyenko

“…The urgency of this issue is caused by its high frequency in postoperative period in patients with gallstone disease. …”
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High resolution ultrasonography in the localization of non[1]palpable testes in children under two years of age by Muhammad Faisal

“…Ultrasound was done using high frequency linear array transducer with virtual convex function rather than convex probe or simple linear probe having limited depth and frequency. …”
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Comprehensive analysis of In0.53Ga0.47As SOI-FinFET for enhanced RF/wireless performance by Priyanka Agrwal, Ajay Kumar

“…The influence of device geometry, biasing schemes, and operating conditions on linearity characteristics and strategies for enhancing linearity while maintaining high-frequency performance is examined. Subsequently, an in-depth analysis of the RF performance metrics, such as fT, fMAX, TFP, GFP and GTFP. …”
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A Causal and Correlation Analysis between China Energy Futures and China Energy-Related Companies Stock Market by Yufang Liu, Chi Zhang, Wang Zhang

“…To identify the impact of INE on the related stock market, we collected high-frequency trading data of oil futures and 22 stocks owned by listed companies in the upstream and downstream of China’s oil-related industry chains, constructed a causal chain through Directed Acyclic Graph, and used MFDCCA-MODWT to perform multifractal analysis on the chain. …”
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