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81.
Herranz J Pastor I Castejon F de La Luna E Garcia-Cortes I Barth CJ Ascasibar E Sanchez J Tribaldos V 《Physical review letters》2000,85(22):4715-4718
Fine structures are found in the TJ-II stellarator electron temperature and density profiles, when they are measured using a high spatial resolution Thomson scattering system. These structures consist of peaks and valleys superimposed to a smooth average. Some irregularities remain in an ensemble average of discharges with similar macroscopic parameters such as line density, central temperature, and plasma current. They are found in all the magnetic configurations explored in plasmas heated by electron cyclotron waves. Their characteristics are shown and their possible origin is discussed. 相似文献
82.
The Helmholtz equation describing the propagation of acoustic and electromagnetic waves in a nonhomogeneous media slowly varying
in the horizontal direction is considered. The contribution of the discrete and continuous spectra of the transversal Sturm-Liouville
problem to the asymptotics is studied. A uniform asymptotics for the Green function in neighborhoods of thresholds is obtained. 相似文献
83.
Tom Schoonjans Antonio Brunetti Bruno Golosio Manuel Sanchez del Rio Vicente Armando Solé Claudio Ferrero Laszlo Vincze 《Spectrochimica Acta Part B: Atomic Spectroscopy》2011,66(11-12):776-784
This work presents the recent developments of xraylib, an ANSI C library that provides convenient access to a large number of X-ray related databases, with a focus on quantitative X-ray fluorescence applications. The enhancements include improved X-ray fluorescence production cross sections that take into account cascade effects and M-lines, as well as revised line energies, atomic level widths, Compton broadening profiles etc. A full overview of the complete application programming interface is presented. 相似文献
84.
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87.
In this text, we introduce and study involutive class groups and Brauer groups of a Krull domain R. We derive some exact sequences, connecting these groups and linking them to classical invariants, thus allowing to calculate them in concrete situations. We provide a geometric interpretation in terms of etale cohomology with respect to the sheaf of square roots of unity on Spec(R), as another useful tool to calculate these invariants. 相似文献
88.
It has been found that unsolvated bis (diorganoamino) magnesium compounds react smoothly with carboxylic acids to give the corresponding carboxamides directly in good to excellent yields. 相似文献
89.
D.-X. Chen E. Pardo A. Sanchez 《Physica C: Superconductivity and its Applications》2010,470(9-10):444-450
The driving force on an Abrikosov vortex is calculated numerically from the London equation and involved energies for a vortex perpendicular to the screening current near the surface of a superconductor. Compared with previous analytical derivation of the total force, the partial magnetic, kinematic, and external forces are also obtained so that the nature of the driving force may be deeply discussed. It is shown that the force is neither a Lorentz force nor a Magnus force as often believed and that in order to get a correct result, the image effects and the work done by the applied field must be taken into account. A name of London force is suggested for the driving force. A deep understanding of the nature of the driving force on Abrikosov vortices may also be important in the study of vortex pinning and dynamics in type-II superconductors. 相似文献
90.
J. A. Sanchez H. D. Murray W. Minajew K. Swetljakow S. Frolow P. P. Ssasanow W. A. Blinow H. H. Evers N. Strafford D. O. Jones H. R. Lee Erich Müller E. Dachselt L. Desvergnes S. Palkin K. Lehmstedt O. Zumstein K. Heller und Z. Fleischhaus 《Fresenius' Journal of Analytical Chemistry》1931,86(5-6):262-267
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