Zobrazeno 1 - 10
of 3 885
pro vyhledávání: '"phase measurement"'
Publikováno v:
IEEE Photonics Journal, Vol 16, Iss 3, Pp 1-6 (2024)
The Doppler Asymmetric Spatial Heterodyne (DASH) spectrometer is a new type of high-resolution spectral measurement instrument that has received widespread attention in re-cent years. However, in previous ground experiments, laser sources were often
Externí odkaz:
https://doaj.org/article/1ddb66821d7d497da58e10d53f2b4749
Autor:
Baoqiang Du, Lanqin Tan
Publikováno v:
Sensors, Vol 24, Iss 14, p 4606 (2024)
For the time and frequency signals of Beidou satellites, a high-accuracy phase frequency detection technology based on phase group synchronization is proposed. Using the Beidou receiver and satellite signals as the frequency standard and the measured
Externí odkaz:
https://doaj.org/article/835ac220279641bc91a30110acd93354
Publikováno v:
Photonics, Vol 11, Iss 6, p 512 (2024)
We investigate the utilization of advanced single photons produced by quantum dots (QDs) in a microcavity for quantum metrology. Through the integration of lateral excitation and the Purcell effect in an Fabry–Perot microcavity, we realized single-
Externí odkaz:
https://doaj.org/article/00ace848351047f7a2367e7d4aae4dbc
Autor:
Jihao Xin, Xuyang Ge, Yuan Zhang, Xingdong Liang, Hang Li, Linghao Wu, Jiashuo Wei, Xiangxi Bu
Publikováno v:
Remote Sensing, Vol 16, Iss 7, p 1197 (2024)
In unmanned aerial vehicle (UAV)-based time difference of arrival (TDOA) positioning technique, baselines are limited due to communication constraints. In this case, the accuracy is highly sensitive to the TDOA measurements’ error. This article pri
Externí odkaz:
https://doaj.org/article/d4067a1a26a14b67b58cbd02dda2c7ae
Publikováno v:
Journal of Modern Power Systems and Clean Energy, Vol 11, Iss 4, Pp 1235-1246 (2023)
High-impedance faults (HIFs) in distribution networks may result in fires or electric shocks. However, considerable difficulties exist in HIF detection due to low-resolution measurements and the considerably weaker time-frequency characteristics. Thi
Externí odkaz:
https://doaj.org/article/5f604c87ca7e4d959acc02abd5332cc7
Publikováno v:
Journal of Modern Power Systems and Clean Energy, Vol 11, Iss 3, Pp 907-916 (2023)
The single-line-to-ground faults with line breaks (SLGFs-LBs) occur more and more frequently in distribution networks and can cause major safety accidents. It is difficult to distinguish the single-line-to-ground faults (SLGFs) in resonant grounding
Externí odkaz:
https://doaj.org/article/6e46341f7583471aa7041ec9d8146662
Publikováno v:
Electronics Letters, Vol 59, Iss 13, Pp n/a-n/a (2023)
Abstract Aiming at the problems of high system cost, complex ranging process, low ranging accuracy, and limited measurement distance in commonly used methods for ground fixed point distance measurement journals, a variable frequency microwave ranging
Externí odkaz:
https://doaj.org/article/0812fe0cc58645968ebe3a480c055ab4
Akademický článek
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Akademický článek
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Publikováno v:
Космические аппараты и технологии, Vol 6, Iss 2, Pp 123-132 (2022)
The article presents the results of experimental studies of mutual high-precision navigation methods for unmanned and specialized transport systems. The proposed methods are based on the application of the relative operating modes of two or more angl
Externí odkaz:
https://doaj.org/article/189fbfcc4ca4427194f724c20315fd40