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1.
V. A. Artamonov 《Journal of Mathematical Sciences》1991,57(2):2959-3009
A survey of the development of the theory of universal algebras in the years 1976–1988. Such basic directions of development of this theory as classes of universal algebras (varieties, quasivarieties, etc.), Mal'tsev conditions, congruences, sheaves, homomorphisms, subalgebras, products of algebras, clones of operations, completeness, systems of equations in algeberas, and connections with computer mathematics show up in it. Considerable attention is given to concrete classes of algebras (p-algebras, BCK-algebras, unary algebras, etc.).Translated from Itogi Nauki i Tekhniki, Seriya Algebra, Topologiya, Geometriya, Vol. 27, pp. 45–124, 1989. 相似文献
2.
D. V. Artamonov 《Mathematical Notes》2007,81(5-6):573-589
A natural criterion for dimensional full-valuedness of locally compact spaces with finitely generated local homology is given. 相似文献
3.
The paraelectric resonance spectrum of non-central impurity ions situated in crystal fields of icosahedral symmetry is predicted.
A multiwell potential is considered that corresponds to the displacement of the ions from the center of symmetry toward the
vertices of the icosahedron, the faces of a dodecahedron, and the pentagonal faces of a fullerene molecule. The effective
Hamiltonian of endohedral complexes in external electric fields with arbitrary orientation is obtained, its eigenvalues are
found, and the line intensities of different transitions between the tunnelling levels are calculated.
Fiz. Tverd. Tela (St. Petersburg) 39, 1693–1698 (September 1997) 相似文献
4.
5.
6.
Li G Artamonov M Rabitz H Wang SW Georgopoulos PG Demiralp M 《Journal of computational chemistry》2003,24(5):647-656
High-dimensional model representation (HDMR) is a general set of quantitative model assessment and analysis tools for improving the efficiency of deducing high dimensional input-output system behavior. RS-HDMR is a particular form of HDMR based on random sampling (RS) of the input variables. The component functions in an HDMR expansion are optimal choices tailored to the n-variate function f(x) being represented over the desired domain of the n-dimensional vector x. The high-order terms (usually larger than second order, or equivalently beyond cooperativity between pairs of variables) in the expansion are often negligible. When it is necessary to go beyond the first and the second order RS-HDMR, this article introduces a modified low-order term product (lp)-RS-HDMR method to approximately represent the high-order RS-HDMR component functions as products of low-order functions. Using this method the high-order truncated RS-HDMR expansions may be constructed without directly computing the original high-order terms. The mathematical foundations of lp-RS-HDMR are presented along with an illustration of its utility in an atmospheric chemical kinetics model. 相似文献
7.
A. A. Artamonov A. A. Balandin G. M. Marukyan M. I. Kotelenets 《Chemistry of Heterocyclic Compounds》1967,3(3):456-458
A study is made of the reactions undergone by o-aminoethylbenzene over a mixed oxide catalyst at atmospheric pressure, temperature 580 °–620 ° C, either neat, or in the presence of H2O, CO2, or N2 as diluent. It is shown that under those conditions the main reaction is dehydrocyclization of the o-aminoethylbenzene to indole. The maximum yield of indole (39%) is obtained at 620 ° C with dilution with CO2 or N2 at a weight ratio 11 or 12, respectively. 相似文献
8.
A. F. Artamonov K. A. Nusipbekova F. S. Nigmatullina B. Zh. Dzhienbaev 《Chemistry of Natural Compounds》1997,33(2):162-164
The synthesis has been performed of -monoglyceride derivatives of coumarins — karatavic and galbanic acids and their modified derivatives — phosphates. The structures of the compounds have been confirmed by IR, UV, PMR, and13C and31P NMR spectroscopies.A. B. Bekturov Institute of Chemical Sciences, Academy of Sciences of the Republic of Kazakhstan, Almaty Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 217–220, March–April, 1997. 相似文献
9.
The current situation with research into the effect of ionizing radiation exposure on the structure and properties of polytetrafluoroethylene was analyzed. New methods of radiation-induced modification, that improve the performance characteristics of polytetrafluoroethylene, were discussed. The results of research into properties of polytetrafluoroethylene irradiated at temperatures exceeding the melting point of its crystalline phase in media with different compositions were presented. It is shown that, under certain irradiation conditions, an extremely strong increase (up to 10 000-fold) in the wear resistance of polytetrafluoroethylene can be achieved, with the creepage decreased up to 100-fold. A conclusion was made that high-temperature radiation-induced modification can yield new modifications of the polymer, in which the advantages offered by untreated polytetrafluoroethylene are combined with high mechanical and triboengineering characteristics. 相似文献
10.
A. F. Artamonov F. S. Nigmatullina M. P. Irismetov B. Zh. Dzhiembaev 《Chemistry of Natural Compounds》1999,35(6):638-641
α-Monoglycerides of triterpene acids, glycyrrhetic and 18-dehydroglycyrrhetic, and their citrates are synthesized. The structures
are confirmed using IR, UV, and1H and13C NMR spectroscopies.
A. B. Bekturov Institute of Chemical Sciences, Ministry of Science, Academy of Sciences of the Republic of Kazakhstan, Almaty,
fax (3272) 61 57 65. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 746–750, November–December, 1999. 相似文献