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51.
T. V. Magdesieva A. V. Dolganov P. M. Polestchuk A. V. Yakimanskii M. Ya. Goikhman I. V. Podeshvo V. V. Kudryavtsev 《Russian Chemical Bulletin》2007,56(7):1380-1389
Structural reorganization of polyamide (PA) and low-molecular-weight CuI and CuII complexes with biquinolyl (biQ) ligands during their mutual redox transformations in solution was studied using the electrochemical
methods (cyclic voltammetry and preparative electrolysis) and quantum chemical DFT calculations. The influence of electronic
factors and geometry distortions in the complexes on the ionization energy on going from CuI to CuII was evaluated in comparison. The catalytically active form of the [CuI(PA)L2]BF4 complex can be synthesized in situ from the stable tetrahedral complex [CuI(PA)2]BF4 by the series of successive redox transitions CuI → CuII → CuI accompanied by the loss of one biQ-containing macroligand.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1331–1340, July, 2007. 相似文献
52.
53.
This paper describes investigations of the interaction between bow shock waves generated by cylindrical bodies in a supersonic flow. Numerical simulations are performed using the inviscid Euler equations for cylinders whose axes are parallel to each other and normal to the flow direction. Mostly an infinite periodical cylinder array is considered, but the case of two cylinders is also briefly discussed. Three different regimes of the shock wave interaction, a regular interaction, a Mach interaction, and a choked flow, have been observed for the flow through the periodical cylinder array. In the case of the flow around two bodies, the choked flow is replaced by a regime with a collective bow shock. The transition between different flow regimes is studied by varying the inflow Mach number or the distance between the cylinders. A hysteretic behavior at the transition between the regular and Mach interactions has been observed. The transition is governed by the theoretical detachment and von Neumann criteria based on the local shock wave inclination at the interaction point. 相似文献
54.
D. V. Khotyanovsky A. N. Kudryavtsev 《Journal of Applied Mechanics and Technical Physics》2017,58(5):826-836
Direct numerical simulations of instability development and transition to turbulence in a supersonic boundary layer on a flat plate are performed. The computations are carried out for moderate supersonic (free-stream Mach number M = 2) and hypersonic (M = 6) velocities. The boundary layer development is simulated, which includes the stages of linear growth of disturbances, their nonlinear interaction, stochastization, and turbulent flow formation. A laminar–turbulent transition initiated by distributed roughness of the plate surface at the Mach number M = 2 is also considered. 相似文献
55.
Kudryavtsev V. N. Gamburg Yu. D. Petrii O. A. Grafov B. M. 《Russian Journal of Electrochemistry》2003,39(3):331-332
Russian Journal of Electrochemistry - 相似文献
56.
V. Kh. Kudoyarova G. M. Gusinsky L. A. Rassadin I. V. Kudryavtsev 《Applied Surface Science》1991,50(1-4):173-176
The hydrogen content and depth profile in a-Si1-xCx:H films were measured by the elastic recoil detection (ERD) technique. It is shown that the hydrogen content changes from 15 to 50 at% with increasing carbon content x. For x<0.4 the hydrogen content increases mainly due to the increase of the Si-CH3 contribution and for x > 0.4 due to C-H bonds. By combining the ERD and IR results, the proportionality between the number of Si-CH3 bonds and the intensity of IR absorption due to the Si-CH3 rocking mode vibration is ascertained. The proportionality constant is found to be ArocSi-CH3 = 5 × 1019 cm-2. 相似文献
57.
The concepts of polynomial stabilization, strong polynomial stabilization, and strong stabilization are introduced for a fundamental system of solutions of linear differential equations. Some criteria of such kinds of stabilizations and applications to the theory of existence and uniqueness of solutions of ordinary differential equations are given. An abstract scheme of the obtained results is presented for Banach spaces. 相似文献
58.
59.
D. I. Kudryavtsev 《Ukrainian Mathematical Journal》1989,41(9):1056-1060
Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 41, No. 9, pp. 1226–1230, September, 1989. 相似文献
60.
E. P. Kudryavtsev 《Fluid Dynamics》1980,15(5):683-687
The interaction of plane waves coming from infinity with an infinitely long elastic rod floating on the surface of a liquid is considered. The liquid is assumed to be ideal and have infinite depth. It is assumed that the rod cannot become separated from the liquid. The parameters of the waves that pass through the rod and are reflected from it are determined, and the force factors in the transverse sections of the rod are found.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 62–67, September–October, 1980. 相似文献