Results 31 to 40 of about 12,514,672 (344)

Power loss and electromagnetic energy density in a dispersive metamaterial medium

, 2009
The power loss and electromagnetic energy density of a metamaterial consisting of arrays of wires and split-ring resonators (SRRs) are investigated. We show that a field energy density formula can be derived consistently from both the electrodynamic (ED)
L. Brillouin, L. D. Landau, Pi-Gang Luan
core   +1 more source

Control Strategy for Hybrid Magnetic Bearing Based on Improved Cascaded Reduced-Order Active Disturbance Rejection Controller

CES Transactions on Electrical Machines and Systems
During the startup of the hydraulic turbine generators, the hybrid magnetic bearing support system exhibits displacement fluctuations, and the nonlinearity and strong coupling characteristics of the magnetic bearings limit the accuracy of rotor modeling,
Kaiyu Shan, Ke Wang, Wei Zhang, Yuxiang Zhu, Lu Zhao, Jinquan Zhu   +5 more
doaj   +1 more source

A 2023 update on the performance of ionic-liquid proton-exchange-membrane fuel cells

Frontiers in Energy Research, 2023
A mini-review is provided of the literature concerning the performance of proton-exchange-membrane fuel cells (PEMFCs) containing (immobilized) ionic liquids as possible electrolytes, focusing on papers reporting performance metrics (power and current ...
Allan L. L. East, Cuong M. Nguyen, Rolf Hempelmann   +2 more
doaj   +1 more source

2W/nm Peak-power All-Fiber Supercontinuum Source and its Application to the Characterization of Periodically Poled Nonlinear Crystals

, 2007
We demonstrate a uniform high spectral brightness and peak power density all-fiber supercontinuum source. The source consists of a nanosecond Ytterbium fiber laser and an optimal length PCF producing a continuum with a peak power density of 2 W/nm and ...
B.A. Cumberland, Demircan, Dudley, Dudley, Dunsby, Fei, Genty, Hsiung, J.C. Travers, J.R. Taylor, Jones, Knight, Kudlinski, R.E. Kennedy, Rakich, Ranka, S.V. Popov, Travers, Wadsworth   +18 more
core   +1 more source

Theoretical dark matter halo kinematics and triaxial shape [PDF]

, 2012
In a recent paper, Salvador-Sol\'e et al. (2012) have derived the typical inner structure of dark matter haloes from that of peaks in the initial random Gaussian density field, determined by the power-spectrum of density perturbations characterising the ...
Alberto Manrique, Allgood, Ascasibar, Avila Reese, Bailin, Bardeen, Basilakos, Bertschinger, Bett, Cole, Dehnen, Dekel, Del Popolo, Doroshkevich, Dubinski, Eduard Salvador-Solé, Einasto, Faltenbacher, Franx, Frenk, Guillermo González-Casado, Hansen, Hansen, Hayashi, Jing, Kasun, Lee, Lemson, Ludlow, Lynden Bell, Macciò, Manrique, Manrique, Merritt, Merritt, Navarro, Navarro, Navarro, Nusser, Patiri, Ragone-Figueroa, Rasia, Rossi, Salvador-Sole, Salvador-Solé, Salvador-Solé, Sinue Serra, Stadel, Subramanian, Syer, Taylor, Vass, Vera-Ciro, Wang, Warren, Zeldovich   +55 more
core   +3 more sources

Research on Multi-Dimensional MTPA Control for Five-Phase Interior Permanent Magnet Synchronous Motor

Energies
In order to improve the output torque/current utilization of five-phase interior permanent magnet synchronous motor (FP-IPMSM) when running below base speed, a multi-dimensional maximum torque per ampere (MTPA) control strategy based on virtual signal ...
Yihong Qin, Peng Zhou, Zhibao Yuan, Haiping Xu   +3 more
doaj   +1 more source

Sound Power Density Fields [PDF]

The Journal of the Acoustical Society of America, 1942
A theoretical study of the sound power density field radiated from a simple source, a doublet source, a single point source before a totally reflecting plane (free as well as rigid), and a piston vibrating in an infinite fixed wall have been investigated.
J. H. Enns, F. A. Firestone
openaire   +1 more source

Understanding redshift space distortions in density-weighted peculiar velocity

, 2016
Observations of the kinetic Sunyaev-Zel'dovich (kSZ) effect measure the density-weighted velocity field, a potentially powerful cosmological probe. This paper presents an analytical method to predict the power spectrum and two-point correlation function ...
Okumura, Teppei, Spergel, David N., Sugiyama, Naonori S.   +2 more
core   +1 more source

The cosmological gravitational wave background from primordial density perturbations [PDF]

, 2006
We discuss the gravitational wave background generated by primordial density perturbations evolving during the radiation era. At second-order in a perturbative expansion, density fluctuations produce gravitational waves. We calculate the power spectra of
A. A. Starobinskii, Chris Clarkson, David Wands, I. S. Gradshteyn, Kishore N. Ananda   +4 more
core   +4 more sources

Intraoperative Collection of Ascitic Fluid With Intra‐ or Postoperative Reinfusion in Ovarian Cancer: Safety and Feasibility of a Roller Pumping Method

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Patients with ovarian cancer often present with massive ascites, leading to significant protein loss during surgical procedures. Although cell‐free concentrated ascites reinfusion therapy (CART) is used in palliative settings to mitigate protein loss, its application in intraoperative settings remains unexplored.
Yutaka Yoneoka, Tsukuru Amano, Akimasa Takahashi, Mari Deguchi, Hiroyuki Yamanaka, Yuji Tanaka, Shunichiro Tsuji, Takashi Murakami   +7 more
wiley   +1 more source