Results 21 to 30 of about 248,313 (294)

Radio Frequency Fingerprint Extraction Based on Multidimension Permutation Entropy

open access: yesInternational Journal of Antennas and Propagation, 2017
Radio frequency fingerprint (RF fingerprint) extraction is a technology that can identify the unique radio transmitter at the physical level, using only external feature measurements to match the feature library.
Shouyun Deng   +3 more
doaj   +1 more source

Application of disturbance observer-based control on pulsed superconducting radio frequency cavities

open access: yesPhysical Review Accelerators and Beams, 2021
A disturbance observer (DOB)-based control approach was verified using the low-level radio-frequency systems of superconducting (SC) cavities operated in a continuous wave (CW) mode in a compact energy recovery linac (cERL) at KEK.
Feng Qiu   +12 more
doaj   +1 more source

RF power design optimization in MRI system

open access: yesMagnetic Resonance Letters, 2021
Magnetic resonance image quality and patient safety have been the focus of engineering and research ever since the invention of equipment in the early 1970s.
Baogui Zhang, Kun Wang, Tianzi Jiang
doaj   +1 more source

Transport properties of Andreev polarons in superconductor-semiconductor-superconductor junction with superlattice structure [PDF]

open access: yes, 2011
Transport properties of a superconductor-semiconductor-superconductor (S-Sm-S) junction with superlattice structure are investigated. Differential resistance as a function of voltage shows oscillatory behavior under the irradiation of radio-frequency (RF)
Akazaki, Tatsushi   +6 more
core   +3 more sources

Effects of Radio Frequency Heating on the Stability and Antioxidant Properties of Rice Bran

open access: yesFoods, 2021
Radio frequency (RF) technology is considered as a rapid heating method. Lipase in rice bran could highly accelerate lipid oxidation. The objectives of this study were to establish the radio frequency heating conditions for lipase inactivation and to ...
Yen-Hui Chen, Yu-Fen Yen, Su-Der Chen
doaj   +1 more source

Radio-Frequency (RF) Systems

open access: yes, 2021
31 pages, 38 figures, Proceedings of the CAS Course: Introduction to Accelerator ...
openaire   +2 more sources

Reconfigurable RF Energy Harvester with Customized Differential PCB Antenna

open access: yesJournal of Low Power Electronics and Applications, 2015
In this work, a Radio Frequency (RF) Energy Harvester comprised of a differential Radio Frequency-to-Direct Current (RF-DC) converter realized in ST130 nm Complementary Metal-Oxide-Semiconductor (CMOS) technology and a customized broadband Printed ...
Alessandro Bertacchini   +4 more
doaj   +1 more source

Construction of Hybrid Dual Radio Frequency RSSI (HDRF-RSSI) Fingerprint Database and Indoor Location Method

open access: yesSensors, 2020
Radio frequency communication technology has not only greatly improved public network service, but also developed a new technological route for indoor navigation service.
Haotai Sun   +3 more
doaj   +1 more source

Tunable negative permeability in a three-dimensional superconducting metamaterial [PDF]

open access: yes, 2015
We report on highly tunable radio frequency (rf) characteristics of a low-loss and compact three dimensional (3D) metamaterial made of superconducting thin film spiral resonators. The rf transmission spectrum of a single element of the metamaterial shows
Anlage, Steven M.   +3 more
core   +3 more sources

A Review of the Radio Frequency Non-destructive Testing for Carbon-fibre Composites

open access: yesMeasurement Science Review, 2016
The purpose of this paper is to review recent research on the applications of existing non-destructive testing (NDT) techniques, especially radio frequency (RF) NDT, for carbon-fibre reinforced plastics (CFRP) composites.
Li Zhen, Meng Zhaozong
doaj   +1 more source

Home - About - Disclaimer - Privacy