排序方式: 共有16条查询结果,搜索用时 9 毫秒
1.
V. T. Ermolaev Yu. L. Rodygin A. G. Flaksman 《Radiophysics and Quantum Electronics》1994,37(4):308-318
Methods are proposed for determination of the weight vector in adaptive antenna arrays (AA) in the case of a short input-process sample, when the number of sampled vectors is smaller than the number of AA elements and an inverted correlation matrix of the interference in the AA receiving channels does not exist.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 37, No. 4, pp. 493–509, April, 1994. 相似文献
2.
3.
4.
5.
6.
V. L. Vaks G. A. Domrachev Yu. L. Rodygin D. A. Selivanovskii E. I. Spivak 《Radiophysics and Quantum Electronics》1994,37(1):85-88
The hydrogen-peroxide concentrations c(H2O2) in water irradiated by electromagnetic energy at frequencies of 2500 MHz and 10000 MHz are measured by means of chemiluminescence. It is concluded that water dissociation into H and OH groups is a part of the mechanism of microwave-radiation absorption.Institute of Applied Physics, Russian Academy of Sciences. Institute of Organometallic Chemistry, Russian Academy of Sciences. Translated from izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 37, No. 1, pp. 149–154, January, 1994. 相似文献
7.
The use of calcium carbide (in the presence of H2O) as a source of acetylene in the reaction with methyl 2-amino-4,6-O-benzylidene-2-deoxy-β-d-glucopyranoside under superbasic conditions (KF, KOH, DMSO, 130 °C, 3 h) led to the corresponding vinyl ether in 78% yield. The vinylation does not affect other reaction centers. Replacement of water with deuterium oxide in the reaction mixture gave a stable deuterated analog of this vinyl ether in 72% yield. The one-step isotopic enrichment was practically quantitative (isotopic purity >96%). Introduced deuterium atoms can be used as a convenient label in further transformations.
相似文献8.
I. V. Loginova K. S. Rodygin S. A. Rubtsova P. A. Slepukhin A. V. Kuchin V. A. Polukeev 《Russian Journal of Organic Chemistry》2011,47(1):124-130
3-Benzylsulfanyl-4,5-diphenyl-4H-1,2,4-triazole, 5-methylsulfanyl-1-phenyl-1H-tetrazole, 2-methylsulfanyl-1H-benzimidazole, 2-benzylsulfanyl-1H-benzimidazole, and 1-butylsulfanyl-4-nitrobenzene were oxidized to the corresponding sulfoxides with chlorine dioxide using different modes of oxidant supply. The oxidation process was characterized by high chemoselectivity. 相似文献
9.
Low-Temperature Operation Features of Proton-Exchange Membrane Fuel Cells with an Active Air Cooling
Rodygin A. I. Melnikov A. P. Ivashkin K. G. Sivak A. V. Kashin A. M. Ivanov D. A. 《Russian Journal of Electrochemistry》2021,57(9):985-988
Russian Journal of Electrochemistry - Development of operation algorithms and proper design of proton exchange membrane fuel cell stacks for effective operation at various external climatic... 相似文献
10.
A. S. Golubev G. S. Starostin K. S. Chunikhin A. S. Peregudov K. C. Rodygin S. A. Rubtsova P. A. Slepukhin A. V. Kuchin N. D. Chkanikov 《Russian Chemical Bulletin》2011,60(4):733-745
Methods for the synthesis of 4-R-6,7-dihydro-1H-pyrazolo[3,4-b]pyridin-6-ones (R = CF2SAr and 4-CFHSAr) were developed. The derivatives with R = CF2SAr were obtained by both heterocyclization of 1-substituted 5-aminopyrazoles with ethyl 4,4-difluoro-3-oxo-4-phenylsulfanylbutanoate
and replacement of the Br atom in 4-bromodifluoromethyl-6,7-dihydro-1H-pyrazolo[3,4-b]pyridin-6-ones by sodium arenethiolates. The fragment 4-CF-HSAr was introduced by replacement of the Cl atom in 4-chlorofluoromethyl-6,7-dihydro-1H-pyrazolo[3,4-b]pyridin-6-ones by sodium arenethiolates. Oxidation of 4-CF2SPh-6,7-dihydro-1H-pyrazolo[3,4-b]pyridin-6-ones gave the corresponding sulfoxides; their structures were confirmed by X-ray diffraction data. 相似文献