Results 191 to 200 of about 4,794,485 (241)
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High frequency transformer modeling
ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196), 2002This paper presents a technique of indirect measurement of linear and nonlinear elements of a wideband transformer using the reflection coefficient technique with the scattering matrix (S-parameters). The S-parameter frequency domain measurement method of the wideband RF transformer and conversion into a discrete model is discussed. The leakage and the
Janusz Biernacki, Dariusz Czarkowski
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Adaptive time-frequency transform
IEEE International Conference on Acoustics Speech and Signal Processing, 1993A matching pursuit decomposes any signal into a linear expansion of waveforms that belong to a dictionary of functions. These waveforms are selected in order to best match the signal structures. For dictionaries of functions that have a wide range of different time-frequency localizations, a matching pursuit yields an adaptive time-frequency transform.
Stéphane Mallat, Zhifeng Zhang
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General Parameterized Time-Frequency Transform
IEEE Transactions on Signal Processing, 2014zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yang Yang 0119 +4 more
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International Meeting for Applied Geoscience & Energy, 1992
In signal processing we often perform time shifts. Considering the duality of time domain and frequency domain representations, we may also want to shift the spectrum of a signal. The frequency shift transform is such a process. It is equivalent to complex modulation or demodulation of a signal (Oppenheim, 1987).
Youli Quan, J. M. Harris
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In signal processing we often perform time shifts. Considering the duality of time domain and frequency domain representations, we may also want to shift the spectrum of a signal. The frequency shift transform is such a process. It is equivalent to complex modulation or demodulation of a signal (Oppenheim, 1987).
Youli Quan, J. M. Harris
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2008 International Conference on Neural Networks and Signal Processing, 2008
Discrete cosine transform(DCT) is one of the most powerful tools in image processing. In this paper, we show that each basis of the two dimensional discrete cosine transform (2D-DCT) is an ldquoeigenvectorrdquo of the frequency matrix which is used to obtain basis images of a two dimensional frequency transform (2D-FRT).
null Suicheng Gu +2 more
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Discrete cosine transform(DCT) is one of the most powerful tools in image processing. In this paper, we show that each basis of the two dimensional discrete cosine transform (2D-DCT) is an ldquoeigenvectorrdquo of the frequency matrix which is used to obtain basis images of a two dimensional frequency transform (2D-FRT).
null Suicheng Gu +2 more
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Frequency-dependence of a balun evaluated by a frequency transformation
Radio and Electronic Engineer, 1969By using a network transformation the frequency dependence of the balancing and matching properties of a transmission-line balun can be evaluated by studying rational network functions.
M.C. Vanwormoudt, D.H.J. Baert
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Increased transformation frequency in E. coli
Biochemical and Biophysical Research Communications, 1978Abstract The transformation efficiency of Escherichia coli prepared by the calcium-heat shock procedure has been increased sixfold by growth of cells in 0.5 M sucrose and the addition of 1 μg/ml lysozyme along with DNA. A mutant of E. coli , hyt , has been selected which has a tenfold increased efficiency of transformation.
B, Molholt, J, Doskocil
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Proceedings of the IRE, 1927
In the foregoing paper a method for calculating the amplification curve of an audio frequency transformer is developed in terms of the usual constants of the transformer and of the tube. The distributed capacity of the coils and the mutual capacity between the primary and secondary coils are represented by lumped capacities. The exciting current of the
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In the foregoing paper a method for calculating the amplification curve of an audio frequency transformer is developed in terms of the usual constants of the transformer and of the tube. The distributed capacity of the coils and the mutual capacity between the primary and secondary coils are represented by lumped capacities. The exciting current of the
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Smart Transformer as a Variable Frequency Transformer
2021 6th IEEE Workshop on the Electronic Grid (eGRID), 2021Dwijasish Das, Chandan Kumar
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