Results 121 to 130 of about 81,530 (345)

Effect of losses in an active device and harmonic network on the efficiency of Class F and inverse Class F power amplifiers [PDF]

, 2012
High frequency class F and inverse class F power amplifiers obtain high efficiency of dc to ac power conversion, by reducing the overlap of voltage and current waveforms at the output of the active device, to ensure that the power dissipated in the ...
Danaher, Sean, Ghassemlooy, Zabih, Korolkiewicz, Edward, Liu, Lei, Lu, Qing, Sambell, Alistair   +5 more
core  

Nonlinear Near-Field Microwave Microscope For RF Defect Localization in Superconductors

, 2010
Niobium-based Superconducting Radio Frequency (SRF) cavity performance is sensitive to localized defects that give rise to quenches at high accelerating gradients.
Anlage, Steven M., Mircea, Dragos I., Tai, Tamin, Xi, X. X., Zhuang, C. G.   +4 more
core   +1 more source

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Calculation and Optimization of Resistive Wall and RF Cavity Impedance in Medium Energy Diffraction Limit Storage Ring

Yuanzineng kexue jishu, 2022
In the diffraction limit storage ring, the size of the vacuum chamber was greatly reduced compared with the third-generation synchronous light source due to the high-gradient small-aperture magnet, and the impedance of ring is significantly increased ...
WANG Meng;ZHANG Wenzhi;TIAN Shunqiang;CAI Chuanbing;LIU Xinzhong
doaj  

A Distributed-Controlled Harmonic Virtual Impedance Loop for AC Microgrids

, 2020
Anubrata Das, Ankit Shukla, A. Shyam, Sandeep Anand, Josep M. Guerreo, Soumya Ranjan Sahoo   +5 more
openalex   +2 more sources

Harmonic stability analysis of single‐phase converters in electric multiple units based on an impedance model with harmonic linearization [PDF]

, 2023
Ting Li, Jiawei Liu, Xunjun Chen, Jing Gou, Heng Zhou, Siqi Wu, Zhigang Liu   +6 more
openalex   +1 more source

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source

Harmonic State Space Based Impedance Modeling and Virtual Impedance Based Stability Enhancement Control for LCC-HVDC Systems

Journal of Modern Power Systems and Clean Energy
Line commutated converter based high-voltage direct-current (LCC-HVDC) transmissions are prone to harmonic oscillation under weak grids. Impedance modeling is an effective method for assessing interaction stability.
Yifeng Liu, Xiaoping Zhou, Quan Chen, Hanhang Yin, Lerong Hong, Hao Tian, Ying Chen, Siyuan Li   +7 more
doaj   +1 more source

Soft Ionic and Electronic Triboelectric Nanogenerators: Toward Attachable and Implantable Biomedical Applications

Advanced Materials, EarlyView.
This review provides an overview of triboelectric nanogenerator (TENG)–based biomedical applications by classifying studies into electronic and ionic systems across attachable and implantable platforms. It summarizes key material choices, device structures, and working mechanisms that characterize current TENG‐based research, and outlines six future ...
Kyongtae Choi, Jimin Park, Won Jun Song, Soohwan An, Seonggyu Choe, Byeong‐Rak Keum, Min Young Kim, Dae Hee Hwang, Young‐Geun Park, Sung‐Won Kim, Sangyul Baik, Gwang‐Bum Im, Younghoon Lee   +12 more
wiley   +1 more source

Magnetization reversal process and nonlinear magneto-impedance in Cu/NiFe and Nb/NiFe composite wires

, 2004
The magnetization reversal of Cu/NiFe and Nb/NiFe composite wires carrying AC current is studied. The frequency spectrum of a voltage induced in a pick-up coil wound around the wire is analyzed.
A.B Granovsky, A.F Prokoshin, A.L Rakhmanov, A.M Yakunin, A.S Antonov, Antonov, Antonov, Antonov, Beach, Garcia, I.T Iakubov, Kurlyandskaya, Kurlyandskaya, N.A Buznikov, Stoner, Usov, Vazquez, Yelon   +17 more
core   +1 more source