Results 31 to 40 of about 5,329,790 (237)
An Inverse Problem for Localization Operators
, 2012 A classical result of time-frequency analysis, obtained by I. Daubechies in 1988, states that the eigenfunctions of a time-frequency localization operator with circular localization domain and Gaussian analysis window are the Hermite functions.
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Equivalence analysis of dielectric test methods in time domain and frequency domain
International Journal of Electrical Power & Energy SystemsWideband dielectric response is crucial for accurate assessment of insulation condition. However, time-domain measurements such as polarization and depolarization current (PDC) tests often lose high-frequency components, while frequency domain ...
Lin Du, Xin Li, Shixian Hui, Chao Xing
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Analysis of nonlinear oscillators using volterra series in the frequency domain Part I : convergence limits [PDF]
, 2009 The Volterra series representation is a direct generalisation of the linear convolution integral and has been widely applied in the analysis and design of nonlinear systems, both in the time and the frequency domain.
Billings, S.A., Li, L.M.
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Research on signals extrapolation in the time domain based on wavelet analysis
The Journal of Engineering, 2019 Characteristic of modulation spectrum is important for radar targets classification and recognition, while signals with high occupation ratio cause low spectral resolution.
Huan Liu +3 more
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, 2016 Reissner-Nordstr\"om Anti-de Sitter (RNAdS) black holes are unstable against the charged scalar field perturbations due to the well-known superradiance phenomenon.
Li, Ran, Zhang, Hongbao, Zhao, Junkun
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Türk Yoğun Bakim Derneği DergisiSepsis causes a series of pathological changes, such as cardiovascular, respiratory, and thermoregulation. These changes alter heart rate variability (HRV).
Hasan Kazdağlı, Hasan Fehmi Özel
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Scalar Wave Equation Modeling with Time-Space Domain Dispersion-Relation-Based Staggered-Grid Finite-Difference Schemes [PDF]
, 2011 The staggered-grid finite-difference (SFD) method is widely used in numerical modeling of wave equations. Conventional SFD stencils for spatial derivatives are usually designed in the space domain.
Liu, Yang, Sen, Mrinal K.
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Nonlinear Flutter Time-domain Analysis of Control Surfaces with Freeplay in a Certain Airplane
Hangkong gongcheng jinzhan, 2021 The freeplay of control surfaces is one of typical types of structural nonlinearity,which is caused by design,manufacture,assembly,and it may easily lead to the limit cycle oscillation(LCO).LCO is usually shown as equal amplitude vibration,and it may ...
ZHANG Fei, CHENG Fang
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Analysis of losses in 2D photonic crystal waveguides using the 3D finite difference time domain (FDTD) method [PDF]
, 2002 The 3D FDTD method is used to obtain loss versus hole depth in a 2D photonic crystal waveguide by simulating two different length guides. The transmission results are validated against published measured data.
Craddock, IJ +4 more
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Machine Learning for GNSS Time Series Analysis in the Time Domain
Russian Journal of Earth SciencesThe paper presents the results of developing a method for analyzing time series of GNSS measurements based on a machine learning approach. The constructed algorithm was tested on GNSS data from the vicinity of sources of large earthquakes occurred in ...
Gabsatarov Yuriy, Vladimirova Irina
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