Results 31 to 40 of about 8,503,197 (295)

Practical Instantaneous Cable Tension Estimation for Monitoring of Cable-Stayed Bridges

Applied Sciences
This study proposes a practical framework for estimating instantaneous stay-cable tension in cable-stayed bridges based on the first-order frequency moment (FFM).
Jungwook Seo, Changsu Shim, Jongchil Park   +2 more
doaj   +1 more source

A new technique for instantaneous frequency rate estimation [PDF]

, 2002
This letter introduces a two-dimensional bilinear mapping operator referred to as the cubic phase (CP) function. For first-, second-, or third-order polynomial phase signals, the energy of the CP function is concentrated along the frequency rate law of ...
O'Shea, Peter J.
core   +1 more source

An iterative method for instantaneous frequency estimation

, 2021
In this paper, we propose an iterative method to estimate the instantaneous frequency of a signal based on the discrete evolutionary transform (DET). The DET provides a representation for non-stationary signals and a time-frequency kernel that permits us
Yalcin, M, Akan, A, Chaparro, LF
core   +1 more source

A Demodulation Model of Dynamic Low-Finesse Fabry-Perot Cavity Based on the Instantaneous Frequency

IEEE Access, 2020
If the measurand changes during the spectrum acquisition process, it easily leads to the failure of the classic demodulation algorithms of low-finesse optical fiber Fabry-Perot (FP) sensors. To address this problem, a novel demodulation model is proposed
Wei Zhang, Bing Xiong, Bin Shao, Xiaohua Lei, Weimin Chen   +4 more
doaj   +1 more source

Kernel estimation of the instantaneous frequency [PDF]

IEEE Transactions on Signal Processing, 1994
We consider kernel estimators of the instantaneous frequency of a slowly evolving sinusoid in white noise. The expected estimation error consists of two terms. The systematic bias error grows as the kernel halfwidth increases while the random error decreases.
openaire   +3 more sources

Low-Complexity Vibration-Based Condition Monitoring for Rolling Bearings: A Novel Instantaneous Amplitude–Frequency Approach

IEEE Open Journal of Instrumentation and Measurement
In vibration-based condition monitoring (VBCM) of rotating machinery, bearing defects typically induce amplitude and frequency modulations, making joint instantaneous amplitude–frequency analysis effective for distinguishing healthy from abnormal ...
Sulaiman Aburakhia, Ismail Hamieh, Sami Muhaidat, Abdallah Shami   +3 more
doaj   +1 more source

Instantaneous Frequency Estimation By Group Delay Attractors And Instantaneous Frequency Attractors

, 2014
Publication in the conference proceedings of EUSIPCO, Lisbon, Portugal ...
Soo-Chang Pei, Shih-Gu Huang
openaire   +3 more sources

Instantaneous frequency estimation using the cross Wigner-Ville distribution with application to nonstationary transient detection [PDF]

, 1990
: A method based on an iterative procedure incorporating time-frequency distributions (TFDs) is proposed for instantaneous frequency (IF) estimation of rapidly time-varying signals.
Boashash, Boualem, O'Shea, Peter J.
core   +1 more source

A Chirp-Rate-Driven Adaptive Window Chirplet Transform and Its Application in Bearing Fault Diagnosis

Machines
In this paper, we propose an instantaneous chirp-rate-driven adaptive window Chirplet transform algorithm for the analysis of strong time-varying nonlinear frequency-modulated signals with uncorrelated components.
Zhonghao Liu, Gang Yu, Tian Ran Lin
doaj   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source