Results 51 to 60 of about 4,484,179 (391)

Electromechanical Equivalent Circuit Model of a Piezoelectric Disk Considering Three Internal Losses

IEEE Access, 2020
Heat generation by internal loss factors of piezoelectrics is one of the critical issues for high power density piezoelectric applications, such as ultrasonic motors, piezoelectric actuators and transducers.
Xiaoxiao Dong, Kenji Uchino, Chunrong Jiang, Long Jin, Zhike Xu, Yue Yuan   +5 more
doaj   +1 more source

Improved Microstrip-to-ESIW Transition With Elliptical Dielectric Taper in Ku- and Ka-Bands

IEEE Access, 2022
Empty Substrate Integrated Waveguide (ESIW) technology preserves the many advantages of the Substrate Integrated Waveguide (SIW) such as low cost, low profile, and easy integration with Printed Circuit Boards (PCBs).
Jose A. Ballesteros, Angel Belenguer, Marcos D. Fernandez, Hector Esteban Gonzalez, Vicente E. Boria   +4 more
doaj   +1 more source

Propagation of the surface plasmon polaritons through gradient index and periodic structures

, 2010
We study the propagation of surface electromagnetic waves along the metallic surface covered by various layered dielectric structures. We show that strong radiative losses typical for the scattering of the surface wave can be considerably suppressed when
Economou, Hohenau, Johnson, Karalis, Lahm, Maier, Oulton, P. Markoš, Pendry, Shvartsburg, Stegeman, T. Váry, Váry, Váry, Zayats   +14 more
core   +1 more source

Approximate square-root-time relaxation in glass-forming liquids [PDF]

, 2007
We present data for the dielectric relaxation of 43 glass-forming organic liquids, showing that the primary (alpha) relaxation is often close to square-root-time relaxation.
Albena I. Nielsen, Barlow A. J., Bo Jakobsen, Davidson D. W., Doi M., Isakovich M. A., Isakovich M. A., Jeppe C. Dyre, Kremer F., Kristine Niss, Niels Boye Olsen, Ranko Richert, Tage Christensen   +12 more
core   +3 more sources

Dielectric properties of bismuth titanate ceramics containing SiO2 and Nd2O3 as additives [PDF]

Processing and Application of Ceramics, 2012
Bismuth-titanate ceramics containing SiO2 and Nd2O3 as additives are synthesized by melt quenching method in the system Bi2O3-TiO2-Nd2O3-SiO2 in the temperature range of 1250–1500 °C. The phase composition of the obtained materials is determined by X-ray
Stanislav S. Slavov, Milena Z. Krapchanska, Elena P. Kashchieva, Svetlin B. Parvanov, Yanko B. Dimitriev   +4 more
doaj  

Poynting's theorem for planes waves at an interface: a scattering matrix approach

, 2007
We apply the Poynting theorem to the scattering of monochromatic electromagnetic planes waves with normal incidence to the interface of two different media.
C. Zagoya, Cohen-Tannoudji C., Jackson J. D., M. Martínez-Mares, Marion J. B., Mello P. A., Merzbacher E., Reitz J. R., V. Domínguez-Rocha   +8 more
core   +1 more source

Dielectric spectroscopy study of thermally-aged extruded model power cables [PDF]

, 2010
“Model” extruded power cables, having a much reduced geometry but using the same extrusion techniques and materials as full-sized cables, have been examined using dielectric spectroscopy techniques to study their thermal ageing effects.
Dissado, L. A., Dodd, S. J., Fothergill, J., Fu, M., Liu, T., Nilsson, U. H., Perrot, F.   +6 more
core   +1 more source

Optimized Time–Frequency Analysis for Induction Motor Fault Detection Using Hybrid Differential Evolution and Deep Learning Techniques

International Journal of Adaptive Control and Signal Processing, EarlyView.
Workflow of the parameter optimization process for ITSC fault detection, applying Differential Evolution optimization and the Smooth Pseudo Wigner‐Ville Distribution for signal processing. The optimized parameters are then used in the failure identification pipeline, which combines the signal processing with a YOLO‐based architecture for fault severity
Rafael Martini Silva, Avyner Lorran de Oliveira Vitor, Marcelo Favoretto Castoldi, Alessandro Goedtel, Wesley Angelino Souza   +4 more
wiley   +1 more source

A new soft dielectric silicone elastomer matrix with high mechanical integrity and low losses

, 2015
Though dielectric elastomers (DEs) have many favourable properties, the issue of high driving voltages limits the commercial viability of the technology.
F. B. Madsen, Liyun Yu, A. Daugaard, S. Hvilsted, A. Skov   +4 more
semanticscholar   +1 more source

Transmission Losses in Left-handed Materials

, 2002
We numerically analyze the origin of the transmission losses in left-handed structures. Our data confirms that left handed structures can have very good transmission properties, in spite of the expectable dispersion of their effective permeability and ...
C. M. Soukoulis, D.R. Smith, D.R. Smith, D.R. Smith, I. Rousochatzakis, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.B. Pendry, M. Bayindir, N. Garcia, N. Garcia, P. Markoš, P. Markoš, P.M. Valanju, R.A. Shelby, R.A. Shelby, V.G. Veselago   +18 more
core   +1 more source