Results 11 to 20 of about 372,868 (297)

Frequency Estimation for Grid-Tied Inverters Using Resonant Frequency Estimator

open access: yesEnergies, 2021
This paper introduces a new strategy of frequency estimation for grid-tied and stand-alone mode AC/DC power converters. Frequency stabilization is required, especially when operating in stand-alone mode with a Droop Control strategy, or in hybrid mode ...
Dariusz Zieliński, Karol Fatyga
doaj   +1 more source

A Theoretical and Empirical Investigation of Design Characteristics in a Pb(Zr,Ti)O3-Based Piezoelectric Accelerometer

open access: yesSensors, 2020
A theoretical and experimental study on the design-to-performance characteristics of a compression-mode Pb(Zr,Ti)O3-based piezoelectric accelerometer is presented.
Min-Ku Lee   +3 more
doaj   +1 more source

Wireless High Temperature Sensing Chipless Tag Based on a Diamond Ring Resonator

open access: yesMicromachines, 2023
A passive wireless sensor is designed for real-time monitoring of a high temperature environment. The sensor is composed of a double diamond split rings resonant structure and an alumina ceramic substrate with a size of 23 × 23 × 0.5 mm3.
Bo Wang, Youwei Li, Tingting Gu, Ke Wang
doaj   +1 more source

Resonant electro-optic frequency comb [PDF]

open access: yesNature, 2019
High speed optical telecommunication is enabled by wavelength division multiplexing, whereby hundreds of individually stabilized lasers encode the information within a single mode optical fiber. In the seek for larger bandwidth the optical power sent into the fiber is limited by optical non-linearities within the fiber and energy consumption of the ...
Rueda, A.   +4 more
openaire   +4 more sources

Frequency Characteristic of Resonant Micro Fluidic Chip for Oil Detection Based on Resistance Parameter

open access: yesMicromachines, 2018
Monitoring the working condition of hydraulic equipment is significance in industrial fields. The abnormal wear of the hydraulic system can be revealed by detecting the variety and size of micro metal debris in the hydraulic oil.
Zilei Yu   +5 more
doaj   +1 more source

Time Domain Simplified Equations and its Iterative Calculation Model for LLC Resonant Converter

open access: yesIEEE Access, 2020
LLC resonant converters can achieve soft switching and loss reduction. However, the analysis methods of wide frequency range LLC converters generally have problems with incomplete working condition analysis at non-resonant frequencies and there is always
Jingkai Niu   +5 more
doaj   +1 more source

Frequency-hopping mechanism and control method for nonlinear parity-time-symmetric wireless power transfer systems

open access: yesFrontiers in Energy Research, 2023
Nonlinear parity-time-symmetric wireless power transfer (NPTS-WPT) is a novel wireless power transfer technology. NPTS-WPT systems exhibit the resonant frequency bifurcation phenomenon in the strong coupling region.
Changsheng Li   +4 more
doaj   +1 more source

Enhancement of second harmonic generation in a doubly resonant metamaterial [PDF]

open access: yes, 2011
We investigate second harmonic (SH) generation in a doubly resonant metamaterial. We show that SH generation can be enhanced when the resonant condition is satisfied for the SH frequency as well as for the fundamental frequency. A unit cell of the doubly
Kanazawa, Tetsuo   +3 more
core   +2 more sources

Resonance frequency analysis

open access: yesIndian Journal of Dental Research, 2011
Initial stability at the placement and development of osseointegration are two major issues for implant survival. Implant stability is a mechanical phenomenon which is related to the local bone quality and quantity, type of implant, and placement technique used.
Rajiv K Gupta, Thallam V Padmanabhan
openaire   +3 more sources

Analysis of HepG2 cell response to a wide concentration range of mitomycin C using a multichannel quartz crystal microbalance system with a microscope

open access: yesHeliyon, 2023
The morphological response of HepG2 cells to mitomycin C was analyzed using a multichannel quartz crystal microbalance system equipped with a home-built movable microscope that enables the simultaneous acquisition of cell images and measurements of eight-
Hiroshi Muramatsu   +3 more
doaj   +1 more source

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