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131.
V.?V.?Elkin V.?Ya.?Mishuk M.?A.?AbaturovEmail author V.?N.?Alekseev B.?M.?Grafov 《Russian Journal of Electrochemistry》2005,41(11):1141-1158
The electrochemical SOI of an adsorption process occurring at a finite rate is analyzed theoretically in the frequency-potential plane with the diffusion of species undergoing adsorption out of the bulk solution taken into account (Frumkin-Melik-Gaikazyan model). 相似文献
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136.
V. B. Loginov V. I. Troyan A. G. Elkin B. A. Loginov P. V. Borisyuk V. D. Borman V. N. Tronin 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2014,8(3):456-461
A new technique of contour measurements with nanometer precision for the diagnostics of multilayer structures and other samples applied in optical and silicon technologies, and metal processing is proposed. This paper describes the development of two main technical solutions to achieve and verify nanometer resolution of the contour measuring instrument—single-crystal-silicon guide and test plates. The use of a crystal as a linear guide gives the possibility to achieve long-term stability of its bearing surface within a few nanometers. A test sample of a multilayer structure is developed and its parameters are controlled by means of transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge spectroscopy (XANES). The results of measuring test samples with a step height of 100 and 200 nm by means of the contour measurement technique are presented. 相似文献
137.
Michael Elkin 《Israel Journal of Mathematics》2011,184(1):93-128
The problem of constructing dense subsets S of {1, 2, ..., n} that contain no three-term arithmetic progression was introduced by Erdős and Turán in 1936. They have presented a construction
with |S| = W(nlog32)|S| = \Omega ({n^{{{\log }_3}2}}) elements. Their construction was improved by Salem and Spencer, and further improved by Behrend in 1946. The lower bound
of Behrend is
|S| = W( [(n)/(22?2 ?{log2n} ·log1/4n)] ).|S| = \Omega \left( {{n \over {{2^{2\sqrt 2 \sqrt {{{\log }_2}n} }} \cdot {{\log }^{1/4}}n}}} \right). 相似文献
138.
Elkin T��lvez Natalia D��az M. Isabel Men��ndez Dimas Su��rez Ram��n L��pez 《Theoretical chemistry accounts》2011,128(4-6):465-475
Replacement of [Pd(H2O)4]2+ by cis-[Pd(en)(H2O)2]2+, [PdCl4]2?, and [Pd(NH3)4]2+ on the hydrolytic cleavage of the Ace-Ala-Lys-Tyr-Gly?CGly-Met-Ala-Ala-Arg-Ala peptide is theoretically investigated by using different quantum chemical methods both in the gas phase an in water solution. First, we carry out a series of validation calculations on small Pd(II) complexes by computing high-level ab initio [MP2 and CCSD(T)] and Density Functional Theory (B3LYP) electronic energies while solvent effects are taken into account by means of a Poisson-Boltzmann continuum model coupled with the B3LYP method. After having assessed the actual performance of the DFT calculations in predicting the stability constants for selected Pd(II)-complexes, we compute the relative free energies in solution of several Pd(II)?Cpeptide model complexes. By assuming that the reaction of the peptide with cis-[Pd(en)(H2O)2]2+, [Pd(Cl)4]2?, and [Pd(NH3)4]2+ would lead to the initial formation of the respective peptide-bound complexes, which in turn would evolve to afford a hydrolytically active complex [Pd(peptide)(H2O)2]2+ through the displacement of the en, Cl?, and NH3 ligands by water, our calculations of the relative stability of these complexes allow us to rationalize why [Pd(H2O)4]2+ and [Pd(NH3)4]2+ are more reactive than cis-[Pd(en)(H2O)2]2+ and [PdCl4]2? as experimentally found. 相似文献
139.
富钇混合稀土对AM60镁合金显微组织与力学性能的影响 总被引:1,自引:0,他引:1
在AM60镁合金的基础上添加不同质量分数的富Y混合稀土(分别为0.5%,1.0%,1.5%,2.0%),研究了富钇混合稀土对AM60镁合金显微组织与力学性能的影响。结果表明:富Y稀土的加入使AM60镁合金的显微组织明显细化,并能显著提高合金的抗拉强度、屈服强度及延伸率。加入混合稀土后,合金中形成块状的铝钇化合物Al2Y,Al6Mn6Y,β-Mg17Al12相数量减少。当稀土加入量为1%时,合金的各方面性能达到最好。 相似文献
140.
V. I. Elkin 《Differential Equations》2009,45(12):1721-1731
We consider the equivalence problem for underdetermined systems of ordinary differential equations. We present canonical forms
for some types of autonomous systems linear in the derivatives. It is shown that, among three-dimensional autonomous systems
linear in the derivatives, there are infinitely many locally nonequivalent systems. 相似文献
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