Results 1 to 10 of about 5,320,784 (238)

Time to Frequency Domain Analysis of Narrow Band Antennas

International Journal of Antennas and Propagation, 2017
This paper presents system modeling of three different single band antennas using the singularity expansion method (SEM). To acquire the accurate physical complex poles and the corresponding residues of the narrow band antenna model, an enhanced Matrix ...
Sajjad Ur Rehman, Majeed A. S. Alkanhal
doaj   +1 more source

Design and System Characterization of Ultra-Wideband Antennas With Multiple Band-Rejection

IEEE Access, 2017
This paper presents system modelling and characterization of multiple-band notched ultrawideband (UWB) antennas using the singularity expansion method (SEM).
Sajjad ur Rehman, Majeed A. S. Alkanhal
doaj   +1 more source

FDTD Simulation of Dispersive Metasurfaces With Lorentzian Surface Susceptibilities

IEEE Access, 2020
A Finite-Difference Time-Domain (FDTD) simulation of broadband electromagnetic metasurfaces based on direct incorporation of Generalized Sheet Transition Conditions (GSTCs) into a conventional Yee-cell region has been proposed for arbitrary wave ...
Tom J. Smy, Scott A. Stewart, Joao G. N. Rahmeier, Shulabh Gupta   +3 more
doaj   +1 more source

Convergence analysis of domain decomposition based time integrators for degenerate parabolic equations

, 2017
Domain decomposition based time integrators allow the usage of parallel and distributed hardware, making them well-suited for the temporal discretization of parabolic systems, in general, and degenerate parabolic problems, in particular.
Eisenmann, Monika, Hansen, Eskil
core   +1 more source

Polarization reversal and jump-like domain wall motion in stoichiometric LiTaO 3 produced by vapor transport equilibration [PDF]

, 2012
The polarization reversal and domain structure evolution has been studied in stoichiometric lithium tantalate prepared by vapor transport equilibration process.
Akhmatkhanov, A. R., Baturin, I. S., Shishkina, E. V., Shur, V. Ya., Шур, В. Я.   +4 more
core   +1 more source

Machine Learning for GNSS Time Series Analysis in the Time Domain

Russian Journal of Earth Sciences
The paper presents the results of developing a method for analyzing time series of GNSS measurements based on a machine learning approach. The constructed algorithm was tested on GNSS data from the vicinity of sources of large earthquakes occurred in ...
Gabsatarov Yuriy, Vladimirova Irina
doaj   +1 more source

Application of Coupled-Wave Wentzel-Kramers-Brillouin Approximation to Ground Penetrating Radar

Remote Sensing, 2017
This paper deals with bistatic subsurface probing of a horizontally layered dielectric half-space by means of ultra-wideband electromagnetic waves. In particular, the main objective of this work is to present a new method for the solution of the two ...
Igor Prokopovich, Alexei Popov, Lara Pajewski, Marian Marciniak   +3 more
doaj   +1 more source

Thermoacoustic instability - a dynamical system and time domain analysis

, 2014
This study focuses on the Rijke tube problem, which includes features relevant to the modeling of thermoacoustic coupling in reactive flows: a compact acoustic source, an empirical model for the heat source, and nonlinearities.
Chenadec, Vincent Le, Massot, Marc, Richecoeur, Franck, Sayadi, Taraneh, Schmid, Peter   +4 more
core   +3 more sources

Efficient Groundness Analysis in Prolog [PDF]

, 2002
Boolean functions can be used to express the groundness of, and trace grounding dependencies between, program variables in (constraint) logic programs.
Howe, Jacob M., King, Andy
core   +4 more sources

Co-movement of energy commodities revisited: Evidence from wavelet coherence analysis

, 2012
In this paper, we contribute to the literature on energy market co-movement by studying its dynamics in the time-frequency domain. The novelty of our approach lies in the application of wavelet tools to commodity market data.
Barunik, Jozef, Vacha, Lukas
core   +1 more source