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141.
Gavrilov K. N. Bondarev O. G. Tsarev V. N. Shiryaev A. A. Lyubimov S. E. Kucherenko A. S. Davankov V. A. 《Russian Chemical Bulletin》2003,52(1):122-125
New chiral oxazoline-containing phosphoramidite was synthesized and its complex formation with rhodium(i) and palladium(ii) was examined. The new ligand is a highly efficient chiral inductor (ee up to 92%) in palladium-catalyzed asymmetric sulfonylation of 1,3-diphenylallyl acetate with sodium p-toluenesulfinate. 相似文献
142.
Let (x(t),y(t))? be a solution of a Fuchsian system of order two with three singular points. The vector space of functions of the form P(t)x(t)+Q(t)y(t), where P,Q are real polynomials, has a natural filtration of vector spaces, according to the asymptotic behavior of the functions at infinity. We describe a two-parameter class of Fuchsian systems, for which the corresponding vector spaces obey the Chebyshev property (the maximal number of isolated zeros of each function is less than the dimension of the vector space). Up to now, only a few particular systems were known to possess such a non-oscillation property. It is remarkable that most of these systems are of the type studied in the present paper. We apply our results in estimating the number of limit cycles that appear after small polynomial perturbations of several quadratic or cubic Hamiltonian systems in the plane. 相似文献
143.
144.
M. I. Gavrilov L. V. Gortinskaya A. A. Pestov I. Yu. Popov E. S. Tesovskaya 《Physics of Particles and Nuclei Letters》2007,4(2):137-140
Possible applications of two weakly coupled quantum waveguides for quantum computation are considered. The approach is based
on the resonance phenomena in the system. Two different qubits interpretations are described. Some single-qubit and two-qubits
operations are realized in the framework of these interpretations.
The text was submitted by the authors in English. 相似文献
145.
A. A. Vertiy S. P. Gavrilov S. I. Tarapov 《International Journal of Infrared and Millimeter Waves》1992,13(9):1403-1419
Due to rapid progress of the nonlinear optics it has become real to observe and use the phenomenon of optics bistability in such passive structure as a Fabry-Perot resonator filled (completely or partially) with a substance having nonlinear adsorbtion and refraction. The problem of the optic bistability of such resonance structures were discussed in [1,2]. 相似文献
146.
147.
S. P. Gavrilov A. A. Vertiy S. Samedov M. E. ?zel 《International Journal of Infrared and Millimeter Waves》1997,18(10):1967-1989
Time-domain response of a one-mode resonator is investigated by using a complex-exponential representation of the time-domain
impulse response. The transient response of a resonator has calculated for a short incident pulse which has rectangular form
and the radio frequency filling. The convolution integral has been analytically carried out and two solutions for the time
histories of the transient response of the resonator have been found. They are the early-time and late-time portions of the
signal. The behaviour of amplitude and frequency of the transient response of the electrodynamical structure under consideration
is studied. 相似文献
148.
149.
G. A. Zenkovets R. A. Shutilov V. Yu. Gavrilov 《Russian Journal of Inorganic Chemistry》2018,63(11):1511-1518
Stabilization of Cu2+ ions in aqueous and aqueous ammonia solutions of copper acetate was studied for a wide range of ammonia concentrations. The structure of copper acetate hydrate complexes was shown to markedly change upon dissolution in water. In aqueous solutions, copper is stabilized as strongly bound Cu2+ associates (dimers) in a distorted octahedral environment composed of water molecules and acetate groups oxygen atoms in equatorial positions with strong exchange interaction via acetate groups. In solutions of copper acetate in aqueous ammonia, the concentration of ammonia has a crucial effect on the ordering of Cu2+ ions in associates. At high ammonia concentration, disordered copper tetra-ammoniate associates with the \({d_{{x^2} - {y^2}}}\) ground state are formed, whereas at low ammonia concentration, bulky Cu2+ ion associate structures are generated, with the \({d_{{x^2} - {y^2}}}\) ground state, hydroxyl groups in the equatorial plane, and water molecules in the axial positions. 相似文献
150.