Results 21 to 30 of about 37,322 (294)
Effect of Duration and Frequency of Acoustic Doppler Velocimetry Measurement on Calculation of Turbulent Flow Characteristics [PDF]
محیط زیست و مهندسی آب, 2022 Acoustic Doppler velocimetry (ADV) is one of the most suitable devices for measuring flow characteristics. Determination of measurement frequency and duration, in a way that the results are calculated with the lowest error, is very important. The goal of
Mohammad Reza Maddahi, Majid Rahimpour
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Adaptive noise cancelling and time–frequency techniques for rail surface defect detection [PDF]
, 2015 Adaptive noise cancelling (ANC) is a technique which is very effective to remove additive noises from the contaminated signals. It has been widely used in the fields of telecommunication, radar and sonar signal processing.
Liang, B. +11 more
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Photonic-Assisted Instantaneous Frequency Measurement System Based on a Scalable Structure
IEEE Photonics Journal, 2019 We propose and demonstrate a new photonic-assisted instantaneous frequency measurement (IFM) system based on a scalable structure. By using multiple scalable modules, the proposed IFM system can achieve both large operating bandwidth and high measurement
Chengwu Yang, Ling Wang, Jianguo Liu
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IEEE Photonics Journal, 2012 We propose and demonstrate a novel reconfigurable instantaneous frequency measurement (IFM) system based on the dual-parallel Mach-Zehnder modulator (DPMZM).
Wei Li, Ning Hua Zhu, Li Xian Wang
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Energies, 2021 This article proposes a measurement solution designed to monitor the instantaneous frequency in power systems. It uses a data acquisition module and a GPS receiver for time stamping and traceability.
Jose-María Sierra-Fernández +5 more
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Multitab digital instantaneous frequency measurement receiver
2017 25th Signal Processing and Communications Applications Conference (SIU), 2017 This paper proposes an instantaneous frequency measurement (IFM) receiver structure for electronic support measure (ESM) systems. The performance of instantaneous frequency (IF) measurement improves as the IFM receiver delay increases. However, it is observed that the increasing delay introduces ambiguity to the IF measurement In order to resolve the ...
Seckin Ami Yildinm +3 more
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Nature Communications, 2016 Photonic-based instantaneous frequency measurement systems are usually bulky or require high optical power. Here, Burla et al. demonstrate an integrated measurement system that can identify frequency-varying signals in a dynamic fashion, without the need
Maurizio Burla +4 more
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, 2009 Increasing penetration of distributed generation within electricity networks leads to the requirement for cheap, integrated, protection and control systems.
Burt, G.M. +2 more
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Roll angular rate extraction based on modified spline-kernelled chirplet transform
Defence Technology, 2022 The roll angular rate is much crucial for the guidance and control of the projectile. Yet the high-speed rotation of the projectile brings severe challenges to the direct measurement of the roll angular rate.
Hui Zhao +4 more
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IEEE Photonics Journal, 2022 Photonics-assisted microwave instantaneous frequency measurement (IFM) is considered as a promising technique for detecting an unknown radio-frequency (RF) signal, which has advantages of broad frequency measurement range and fast processing speed. Up to
Xin Wang +4 more
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