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Characterizing Architectural Distortion in Mammograms by Linear Saliency
Journal of Medical Systems, 2016Architectural distortion (AD) is a common cause of false-negatives in mammograms. This lesion usually consists of a central retraction of the connective tissue and a spiculated pattern radiating from it. This pattern is difficult to detect due the complex superposition of breast tissue.
Fabián R. Narváez +4 more
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Linear distortional beam theory
Journal of Constructional Steel Research, 1993Abstract The present linear beam theory describes the distortional behaviour of a beam with an open cross-section. The theory accounts for cross-sectional distortion and is thus an improvement of the classic theory. The new theory has been used for an eccentrically loaded and simply-supported U-beam, where the rotation of the beam has been ...
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Identification of linear systems in the presence of nonlinear distortions
Proceedings of the 17th IEEE Instrumentation and Measurement Technology Conference [Cat. No. 00CH37066], 2002This paper treats the identification of linear systems in the presence of nonlinear distortions. It extends the theory developed previously for measurement setups where the input is exactly known and the output is observed with errors (output error framework) to measurement setups where both the input and output are observed with errors (errors-in ...
Pintelon, Rik, Schoukens, Joannes
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Non-linear distortion of the ULF waveform
Planetary and Space Science, 1991Abstract A method is developed, based on the phase portrait determination of quasi harmonic one-dimensional oscillations, which enables us to reveal the weak non-linear distortions of a waveform. The generalized phase portrait of Pc4 ULF waves, recorded by the ISEE satellite, was constructed with the use of the suggested algorithm.
B.V. Kiselev +2 more
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Triple features for linear distorted images
1995The theory of trace transformations and triple features is extended to a new area. In previous papers it was introduced for conformai distortion of images. Many triple features of images are proposed making use of this new theory. Some of the features are independent of shifting, rotating and shrinking images.
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Distortion in Linear Passive Networks
Proceedings of the IRE, 1951It is well known that distortion is suffered by a modulated wave in passing through a practical transmission network. The increasing use of frequency modulation in television relays and other uses where high fidelity is important has made the problem of FM distortion of current interest.
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A novel concept of intermodulation distortion linearization
Microwave and Optical Technology Letters, 1993AbstractIn most cases, microwave amplifier linearization requires complex and voluminous circuitry of very critical tuning, which leads to poor cost effectiveness and poor reproducibility. In this article an innovative concept of IMD linearization, based on direct active device IMD characteristic shaping, is presented.
Jose C. Pedro, Jorge Perez
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An Automatic Non-Linear Distortion Analyzer
The Journal of the Acoustical Society of America, 1951This paper describes a system for automatically recording the non-linear distortion frequency characteristic of a loudspeaker. The system consists of the standard automatic recorder for obtaining the response frequency characteristic, coupled with a system of electronically switched high pass filters which suppress the fundamental, and pass the ...
H. F. Olson, D. F. Pennie
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Array calibration in the presence of linear manifold distortion
2017 51st Asilomar Conference on Signals, Systems, and Computers, 2017We consider the problem of calibrating an antenna array using received signals from known or unknown directions. A linear distortion model is used to characterize the mismatch between the true and assumed array manifolds. An iterative algorithm is presented for the joint estimation of the directions-of-arrival and the distortion matrix based on data ...
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Non-linear distortion in transmission systems
Journal of the Institution of Electrical Engineers - Part I: General, 1945The problem of the distortion noise generated by a signal in its transmission through one or more non-linear devices is analysed. This subject has become of increasing importance in connection with the development of the transmission of different types of signals on a multi-channel basis through a common network, e.g.
R.A. Brockbank, C.A.A. Wass
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