Results 61 to 70 of about 401,492 (244)
MachinesMotor current analysis is useful for ensuring the safety and reliability of electromechanical systems. However, for gearboxes, the commonly used methods of detecting faulty frequency sidebands are easily disturbed by installation errors, inherent ...
Shiyi Chai, Kai Xu
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An Instantaneous Frequency Identification Algorithm for Time-Varying Frequency Signals
IEEE Access, 2019 A high-precision instantaneous frequency (IF) identification algorithm is proposed in this paper. The algorithm is based on the relationship between the signal phase and time, and uses Taylor's expansion to parameterize the time-varying frequency. It can
Li Xiaocong, Meng Xuanren
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Photoswitchable Conductive Metal–Organic Frameworks
Advanced Functional Materials, EarlyView.A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu +5 more
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Analyzing transient-evoked otoacoustic emissions by concentration of frequency and time
, 2018 The linear part of transient evoked (TE) otoacoustic emission (OAE) is thought to be generated via coherent reflection near the characteristic place of constituent wave components.
Liu, Yi-Wen, Wu, Hau-tieng
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Advanced Functional Materials, EarlyView.Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana +2 more
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Practical implementation of digital down conversion for wideband direction finder on FPGA [PDF]
Scientific Technical Review, 2016 Modern direction finders are designed as sensors for interception of radio signals in wider instantaneous bandwidth. Software radio technology offers ability to develop wideband direction finder architectures with programmable intermediate frequency ...
Obradović Vuk +3 more
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Electronics Letters, 2023 This letter proposes a novel dynamic range extension method using an instantaneous frequency (IF)‐tracking method for heterodyne fibre optic hydrophones (FOHs). IFs are used to compensate for large signal amplitudes in the demodulator.
Sufan Yang, Chunxi Zhang, Xiaxiao Wang
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Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids
Advanced Functional Materials, EarlyView.This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow +9 more
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Motion synchronicity of a micro-magnetic-particle chain in a rotating field
AIP Advances, 2022 A magnetic chain consisted of micro-sized beads in a rotating magnetic field is experimented to observe its motion synchronicity with the external field.
Jia-Hong Cheng +2 more
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Computing Instantaneous Frequency by normalizing Hilbert Transform [PDF]
, 2005 This invention presents Normalized Amplitude Hilbert Transform (NAHT) and Normalized Hilbert Transform(NHT), both of which are new methods for computing Instantaneous Frequency. This method is designed specifically to circumvent the limitation set by the
Huang, Norden E.
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