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Europium (Eu+) ions were confined in a Paul trap and detected by non-destructive method. Storage time of Eu+ ions achieved in vacuum was improved by orders of magnitude employing buffer gas cooling. The experimentally detected signal
was fitted to the ion response signal and the total number of ions trapped was estimated. It is found that the peak signal
amplitude as well as the product of FWHM and the peak signal amplitude is proportional to the total number of trapped ions.
The trapped ion secular frequency was swept at different rates and its effect on the absorption line profile was studied both
experimentally and theoretically. 相似文献
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S.G. Kryzhevich 《Journal of Applied Mathematics and Mechanics》2008,72(4):383-390
The bifurcations of dynamical systems, described by a second-order differential equation with periodic coefficients and an impact condition, are investigated. It is shown that a continuous change in the coefficients of the system, during which the number of impacts of the periodic solution increases, leads to the occurrence of a chaotic invariant set. 相似文献
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S. G. Kryzhevich 《Vestnik St. Petersburg University: Mathematics》2014,47(3):102-104
We prove a result concerning the presence of “partial” shadowing for mappings of the most general form. We demonstrate that, for any mapping of a metric compact set into itself and any sufficiently precise pseudotrajectory, there exists an infinite subsequence of some trajectory that pointwise approximates the subsequence of the pseudotrajectory in question with the same indices. 相似文献
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Eliene O Kozlowski Paula C Lima Cristina P Vicente Tito Lotufo Xingfeng Bao Kazuyuki Sugahara Mauro SG Pavão 《BMC biochemistry》2011,12(1):1-2
After the publication of the work entitled "Dermatan sulfate in tunicate phylogeny: Order-specific sulfation pattern and the effect of [→4IdoA(2-Sulfate)β-1→3GalNAc(4-Sulfate)β-1→] motifs in dermatan sulfate on heparin cofactor II activity", by Kozlowski et al., BMC Biochemistry 2011, 12:29, we found that the legends to Figures 2 to 5 contain serious mistakes that compromise the comprehension of the work. This correction article contains the correct text of the legends to Figures 2 to 5. 相似文献
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S. G. Kryzhevich 《Differential Equations》2011,47(1):29-37
We study the rectilinear motion of a mass point with impacts against a stopper. The motion between the impacts is described
by a second-order ordinary differential equation with a parameter. The impact recovery coefficient also depends on the parameter
of the vibroimpact system. We describe a bifurcation that leads to the generation of a Smale horseshoe in a parametric neighborhood
of the chatter phenomenon. We prove the existence of an invariant set described by symbolic dynamics. 相似文献
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Science China Mathematics - We study various weaker forms of the inverse shadowing property for discrete dynamical systems on a smooth compact manifold. First, we introduce the so-called ergodic... 相似文献
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S. G. Psakhie K. P. Zolnikov D. S. Kryzhevich A. V. Zheleznyakov V. M. Chernov 《Crystallography Reports》2009,54(6):1002-1010
The formation of radiation-damage regions (radiation-damage cascades) in vanadium crystallites with internal structures (intergrain boundary) has been simulated by the molecular-dynamic method. The interatomic interaction is described within the embedded-atom method. A relatively small number of clusters of intrinsic point defects (vacancies and self-interstitial atoms) are formed both in ideal vanadium crystallites and in crystallites with boundaries after the relaxation of atomic-displacement cascades. The evolutionary character of atomic-displacement cascades is determined in many respects by the presence of extended boundaries in materials. The intergrain boundaries hinder the propagation of atomic-displacement cascades and store many radiation-induced defects. 相似文献