Zobrazeno 1 - 10
of 1 514
pro vyhledávání: '"time–frequency domain"'
Publikováno v:
电力工程技术, Vol 43, Iss 4, Pp 177-185 (2024)
Time-frequency domain reflection (TFDR) method has the advantages of maturity, convenience and high resolution, so it is widely applied to locate defects in various cables. To ensure the fracture defect of the instrumentation and control (I&C) cable
Externí odkaz:
https://doaj.org/article/ecf148dc8cc341dfb8a5730494a73c30
Publikováno v:
Artificial Intelligence in Geosciences, Vol 5, Iss , Pp 100083- (2024)
Seismic inversion can be divided into time-domain inversion and frequency-domain inversion based on different transform domains. Time-domain inversion has stronger stability and noise resistance compared to frequency-domain inversion. Frequency domai
Externí odkaz:
https://doaj.org/article/1c3724c5f919484295c416cef0b3b925
Publikováno v:
地震科学进展, Vol 54, Iss 6, Pp 389-395 (2024)
During checking continuous waveform record, it was found that some stations of Tianjin such as EWZ were significantly affected by one unknown noise, and EWZ station was the most seriously affected. Long term observations had also found that this nois
Externí odkaz:
https://doaj.org/article/a69678483a744d5593189ce55dfc1a34
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-20 (2024)
Abstract The accurate classification of road surface conditions plays a vital role in ensuring road safety and effective maintenance. Vibration-based techniques have shown promise in this domain, leveraging the unique vibration signatures generated b
Externí odkaz:
https://doaj.org/article/1ca6836bd3f248b4bbe5374da69f2e3f
Publikováno v:
Applied Mechanics, Vol 5, Iss 1, Pp 180-191 (2024)
Face milling is among the processes that can produce a high-precision surface finish. Tool condition monitoring and signal processing algorithms are under extensive research to improve production quality and productivity in machining processes. In th
Externí odkaz:
https://doaj.org/article/d104350ed029449fa2b5b380dc506c87
Publikováno v:
Sensors, Vol 24, Iss 19, p 6449 (2024)
A variable frequency hopping (VFH) signal is a kind of frequency hopping (FH) signal that varies both in frequency and dwell time. However, in radio surveillance, the existing methods for unidentified signals using VFH cannot be effectively handled.
Externí odkaz:
https://doaj.org/article/d33a1ec71e444c52a1e90274f4e0e4a3
Publikováno v:
Metrology and Measurement Systems, Vol vol. 30, Iss No 4, Pp 773-790 (2023)
Since the induction motor operates in a complex environment, making the stator and rotor of the motor susceptible to damage, which would have significant impact on the whole system, efficient diagnostic methods are necessary to minimize the risk of f
Externí odkaz:
https://doaj.org/article/407784e597404d1e9847f335eb3eb074
Publikováno v:
Machines, Vol 12, Iss 10, p 679 (2024)
Gear transmission system fault diagnosis is crucial for the reliability and safety of industrial machinery. The combination of mathematical signal processing methods with deep learning technology has become a research hotspot in fault diagnosis. Firs
Externí odkaz:
https://doaj.org/article/50bc05a3580648cda62f46fecf58d754
Publikováno v:
Protection and Control of Modern Power Systems, Vol 8, Iss 1, Pp 1-16 (2023)
Abstract Because there is insufficient measurement data when implementing state estimation in distribution networks, this paper proposes an attention-enhanced recurrent neural network (A-RNN)-based pseudo-measurement modeling metho. First, based on a
Externí odkaz:
https://doaj.org/article/576023090c634ef3b868a5c225004d4b
Publikováno v:
Journal of Information and Telecommunication, Vol 7, Iss 3, Pp 376-391 (2023)
ABSTRACTMost speech processing models begin with feature extraction and then pass the feature vector to the primary processing model. The solution's performance mainly depends on the quality of the feature representation and the model architecture. M
Externí odkaz:
https://doaj.org/article/993f6de1fc2046089139142a26c22c57