Scattering by an array of PEC cylinders in ferrite media using spectral technique

2021 ◽  
Author(s):  
Zahra Bahrami ◽  
Asghar Keshtkar ◽  
Ayaz Ghorbani
Keyword(s):  
Spectral Technique

On Spectral-Homotopy Perturbation Method Solution of Nonlinear Differential Equations in Bounded Domains

2013 ◽  
Vol 1 (1) ◽  
pp. 25-37
Author(s):  
Ahmed A. Khidir
Keyword(s):  
Perturbation Method ◽  
Homotopy Perturbation Method ◽  
Nonlinear Boundary ◽  
Nonlinear Differential Equations ◽  
Iteration Algorithm ◽  
Test Problems ◽  
Nonlinear Boundary Value Problems ◽  
Homotopy Perturbation ◽  
Spectral Technique ◽  
Homotopy Analysis

In this study, a combination of the hybrid Chebyshev spectral technique and the homotopy perturbation method is used to construct an iteration algorithm for solving nonlinear boundary value problems. Test problems are solved in order to demonstrate the efficiency, accuracy and reliability of the new technique and comparisons are made between the obtained results and exact solutions. The results demonstrate that the new spectral homotopy perturbation method is more efficient and converges faster than the standard homotopy analysis method. The methodology presented in the work is useful for solving the BVPs consisting of more than one differential equation in bounded domains. 

Nuclear Magnetic Resonance Spectroscopic Behaviour of Some Selective Natural Flavonoids: A Look Through

2020 ◽  
Vol 17 (2) ◽  
pp. 185-196
Author(s):  
Shyamal K. Jash ◽  
Dilip Gorai ◽  
Lalan C. Mandal ◽  
Rajiv Roy
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Natural Products ◽  
Magnetic Resonance ◽  
Hard Core ◽  
2D Nmr ◽  
Vital Role ◽  
Spectral Technique ◽  
Nmr Techniques ◽  
Significant Class ◽  
Nuclear Magnetic

Flavonoids are considered as a significant class of compounds among the natural products, exhibiting a variety of structural skeletons as well as multidirectional biological potentials. In structural elucidations of natural products, Nuclear Magnetic Resonance (NMR) spectroscopy has been playing a vital role; the technique is one of the sharpest tools in the hands of natural products chemists. The present resume deals with hard-core applications of such spectral technique, particularly in structural elucidation of flavonoids; different NMR techniques including 1H-NMR, 13C-NMR, and 2D-NMR [viz. 1H-1H COSY, COLOC, HMBC, HMQC] are described in detail.

Corrigendum to “Spectral technique for accurate efficiency measurements of emerging solar cells”. [Sol. Energy 206 (2020) 770–777]

Solar Energy ◽  
2020 ◽  
Author(s):  
Alexey Gavrik ◽  
Artur L. Mannanov ◽  
Sergey Tsarev ◽  
Vladimir V. Bruevich ◽  
Vasiliy A. Trukhanov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Spectral Technique

scholarly journals Towards a spectral technique for determining material geometry around evolved stars: application to HD 179821

2008 ◽  
Vol 388 (2) ◽  
pp. 716-722 ◽  
Author(s):  
J. Nordhaus ◽  
I. Minchev ◽  
B. Sargent ◽  
W. Forrest ◽  
E. G. Blackman ◽  
...  
Keyword(s):  
Evolved Stars ◽  
Spectral Technique

The Influence of Non-linear Longitudinal Aerodynamic Characteristics on the Power Spectral Response of Aircraft to Atmospheric Turbulence

1973 ◽  
Vol 24 (4) ◽  
pp. 284-294
Author(s):  
P A T Christopher ◽  
J M H Dunn
Keyword(s):  
Root Mean Square ◽  
Normal Force ◽  
Spectral Response ◽  
Aerodynamic Characteristics ◽  
Pitching Moment ◽  
Mean Square ◽  
Acceleration Response ◽  
Spectral Technique ◽  
Power Spectral ◽  
Normal Acceleration

SummaryThe power spectral technique has been extended to show the effect of aerodynamic non-linearities on the normal acceleration response of a rigid aircraft in the cruise configuration. Non-linearities in the normal force and pitching moment variations with incidence have been considered. The resulting changes from the linear root-mean-square values of normal acceleration were only 3 to 5½% for a root-mean-square vertical gust velocity of 20 m/s.

BWO-Characterization of Materials and Devices at Frequencies 100-1000 GHz.

2000 ◽  
Vol 631 ◽  
Author(s):  
A. A. Volkov ◽  
V. B. Anzin ◽  
Yu. G. Goncharov ◽  
B. P. Gorshunov ◽  
G. A. Komandin ◽  
...  
Keyword(s):  
High Speed ◽  
Open Space ◽  
Frequency Tuning ◽  
High Radiation ◽  
Phase Measurements ◽  
Spectral Technique ◽  
Wide Range ◽  
Characterization Of Materials ◽  
Space Measurement

ABSTRACTWe have developed multipurpose spectral technique for amplitude and phase measurements at frequencies 100–1000 GHz based on the use of backward wave oscillators (BWOs) as sources of probing radiation. It utilizes to the utmost all the remarkable advantages of BWOs such as high radiation intensity, monochromaticity, polarization, as well as high speed and wide range of frequency tuning. Extremely simple and flexible open-space measurement geometries are used. The developed technique seems to be the most appropriate and promising for the reliable, precise and mass characterization of materials and devices at millimeter-submillimeter waves.

716 Active Noise Control with Moving Evaluation Point by Cross Spectral Technique

2015 ◽  
Vol 2015.68 (0) ◽  
pp. 289-290
Author(s):  
Kou FUKUNAGA ◽  
Yosuke KOBA ◽  
Satoshi ISHIKAWA ◽  
Shinya KIJIMOTO
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Spectral Technique ◽  
Active Noise ◽  
Evaluation Point
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