Results 21 to 30 of about 4,366 (193)
Wigner-Ville Distribution Associated with the Linear Canonical Transform
Journal of Applied Mathematics, 2012 The linear canonical transform is shown to be one of the most powerful tools for nonstationary signal processing. Based on the properties of the linear canonical transform and the classical Wigner-Ville transform, this paper investigates the Wigner-Ville
Rui-Feng Bai +2 more
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International Journal of Distributed Sensor Networks, 2021 Imperfection in a bonding point can affect the quality of an entire integrated circuit. Therefore, a time–frequency analysis method was proposed to detect and identify fault bonds.
Wuwei Feng +3 more
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On Two-Dimensional Quaternion Wigner-Ville Distribution
Journal of Applied Mathematics, 2014 We present the two-dimensional quaternion Wigner-Ville distribution (QWVD). The transform is constructed by substituting the Fourier transform kernel with the quaternion Fourier transform (QFT) kernel in the classical Wigner-Ville distribution definition.
Mawardi Bahri
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Statistical Study of the Entanglement for Qubit Interacting with an Electromagnetic Field
Advances in Mathematical Physics, 2021 A statistical method is applied to predict the behaviour of a quantum model consisting of a qubit interacting with a single-mode cavity field. The qubit is prepared in excited state while the field starts from the binomial distribution state.
Neveen Sayed-Ahmed +6 more
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Post-Earthquake Damage Identification of Buildings with LMSST
Buildings, 2023 The structure is said to be damaged if there is a permanent shift in the post-event natural frequency of a structure as compared with the pre-event frequency. To assess the damage to the structure, a time-frequency approach that can capture the pre-event
Roshan Kumar +2 more
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Robust and fast algorithm for extracting the periodic feature from jet engine modulation signals
The Journal of Engineering, 2019 Jet engine modulation (JEM), a modulation phenomenon induced by the rotating structure of jet engines, is a representative feature extracted from the radar returns for aircraft target recognition.
Jingming Sun, Junpeng Yu
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SAR ground moving target's along-track velocity estimation in the complex image domain via SoWVD
The Journal of Engineering, 2019 A ground moving target is always defocused in the synthetic aperture radar (SAR) image domain due to the along-track velocity. In the image domain, a moving target's complex response along the azimuth direction can be modelled as a linear frequency ...
Zuzhen Huang +3 more
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ANALOGY OF THE SECOND ORDER PHASE TRANSITION IN QUASI-OPTICAL MICROWAVE CAVITY RESONATOR [PDF]
Радиофизика и электроника, 2015 In this paper for the first time we have discovered and studied the analogy of the second order phase transition in spheri-cal microwave cavities with heterogeneity in the form of a metal ball. The transition occurs between the state when the ball is sym-
E. M. Ganapolskii
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Spectral analysis of ultrasonic signals backscartted by mortar: Effect of sand size and temperatures
Materials Letters: X, 2022 This paper presents results of application of Ultrasonic Waves UW in civil engineering. The measurement has been performed by ultrasonic reflection technique using a transducer with central frequency 0,5MHz.
Hicham LOTFI +3 more
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Uncertainty principles for coupled fractional Wigner–Ville distribution
Royal Society Open ScienceThe coupled fractional Wigner–Ville distribution is a more general version of the fractional Wigner–Ville distribution. Main properties including boundedness, Moyal’s formula and inversion formula are studied in detail for the transformation ...
Andi Tenri Ajeng Nur +3 more
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