Results 21 to 30 of about 58,785 (356)
Effect of frequency and flexibility ratio on the seismic response of deep tunnels
Underground Space, 2017 Two-dimensional dynamic numerical analyses have been conducted, using FLAC 7.0, to evaluate the seismic response of underground structures located far from the seismic source, placed in either linear-elastic or nonlinear elastoplastic ground.
Eimar Sandoval, Antonio Bobet
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Target metric and Shell Shaping
Curved and Layered Structures, 2021 We exploit the possibility of deforming a shell by assigning a target metric, which, for 2D structures, is decomposed into the first and second target fundamental-forms.
Argento Gloria Rita +3 more
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Accuracy of face castings employing thermoplastic custom trays for facial molding
Brazilian Journal of Oral Sciences, 2015 Aim: To evaluate the dimensional stability of a new facial molding technique using thermoplastic custom molding tray. Methods: The designs established demarcation of facial anthropometrics landmarks, making linear measurements with a digital caliper ...
Kaue Campos Pavanello +2 more
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Physics and Imaging in Radiation Oncology, 2020 Magnetic resonance imaging (MRI) has exquisite soft-tissue contrast and is the foundation for image guided radiotherapy (IGRT) with integrated magnetic resonance linacs. However, MRI suffers from geometrical distortions. In this study the MRI system- and
Signe Winther Hasler +7 more
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Distortion in linearized electrooptic modulators [PDF]
IEEE Transactions on Microwave Theory and Techniques, 1995 Intermodulation and harmonic distortion are calculated for a simple fiber-optic link with a representative set of link parameters and a variety of electrooptic modulators: simple Mach-Zehnder, linearized dual and triple Mach-Zehnder, simple directional coupler (two operating points), and linearized directional coupler with one and two dc electrodes ...
Bridges, William B., Schaffner, James H.
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Analytical Analysis of SER for Beyond 5G Post-OFDM Waveforms in Presence of High Power Amplifiers
IEEE Access, 2019 This paper studies the performance of enhanced multicarrier waveforms in the presence of a nonlinear memoryless high power amplifier (HPA). In particular, we focus on the in-band non-linear distortions (NLD) and their effects on symbol-error-rate. First,
Hmaied Shaiek +3 more
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Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System
Instruments, 2018 Radio frequency (RF) circuit elements that are traditionally considered to be linear frequently exhibit nonlinear properties that affect the intended operation of many other RF systems. Devices such as RF connectors, antennas, attenuators, resistors, and
Ram M. Narayanan +4 more
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Mitigation of Fiber Nonlinearity Effects in Ultra High-Dense WDM System by Using Fractional Fourier Transform for 32 Channel System [PDF]
Engineering and Technology Journal, 2016 The optical signal is severely degraded when transmitted in the fiber due to both the linear and nonlinear distortions. It is well known that, the linear distortions in single mode fiber include chromatic dispersion (CD) and polarization-mode dispersion (
Ali Y. Fattah, Saif Hussam Abdul-Wahed
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Bit Error Rate Analysis of NOMA-OFDM in 5G Systems With Non-Linear HPA With Memory
IEEE Access, 2021 The orthogonal frequency division multiplexing (OFDM) and the non-orthogonal multiple access (NOMA) scheme are presented as promising techniques to meet the requirement of fifth-generation (5G) communication systems.
Alexander Hilario-Tacuri +3 more
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Stochastic linear programming with a distortion risk constraint [PDF]
OR Spectrum, 2014 Linear optimization problems are investigated whose parameters are uncertain. We apply coherent distortion risk measures to capture the possible violation of a restriction. Each risk constraint induces an uncertainty set of coefficients, which is shown to be a weighted-mean trimmed region.
Bazovkin, Pavel, Mosler, Karl
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