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排序方式: 共有100条查询结果,搜索用时 15 毫秒
1.
V. V. Lozhkarev S. G. Garanin R. R. Gerke V. N. Ginzburg E. V. Katin A. V. Kirsanov G. A. Luchinin A. N. Mal’shakov M. A. Mart’yanov O. V. Palashov A. K. Poteomkin N. N. Rukavishnikov A. M. Sergeev S. A. Sukharev G. I. Freidman E. A. Khazanov A. V. Charukhchev A. A. Shaikin I. V. Yakovlev 《JETP Letters》2005,82(4):178-180
In experiments on the parametrical amplification of femtosecond pulses in wide-aperture DKDP crystals, a power of more than 100 TW has been reached, which is much higher than the record level achieved in such lasers. The energy efficiency obtained for the parametric amplifier is equal to 27%. The energy of a 72-fs pulse is equal to 10 J. 相似文献
2.
Methods and algorithms for the solution of spectral problems of singular and regular pencils D(λ, μ)=A(μ)-λB(μ) of polynomial
matrices A(μ) and B(μ) are suggested (the separation of continuous and discrete spectra, the computation of points of a discrete
spectrum with the corresponding, Jordan chains, the computation of minimal indices and a minimal basis of polynomial solutions,
the computation of the determinant of a regular pencil). Bibliography: 13 titles.
Translated by V. N. Kublanovskaya
Translated fromZapiski Nauchnykh Seminarov POMI, Vol. 202, 1992, pp. 26–70 相似文献
3.
4.
A. Yu. Spivak D. A. Nedopekina E. R. Shakurova R. R. Khalitova R. R. Gubaidullin V. N. Odinokov U. M. Dzhemilev Yu. P. Bel’skii N. V. Bel’skaya S. A. Stankevich E. V. Korotkaya V. A. Khazanov 《Russian Chemical Bulletin》2013,62(1):188-198
New derivatives of lupane triterpenoids, viz., 20,29-dihydrobetulinic and 3-epi-20,29-dihydrobetulinic acid derivatives containing triphenylphosphonium fragments as substituents were synthesized. These compound considerably exceed betulinic acid in antitumor activity. 相似文献
5.
Lezova I. E. Salamatov E. I. Taranov A. V. Khazanov E. N. Charnaya E. V. Shevchenko E. V. 《Journal of Experimental and Theoretical Physics》2019,129(5):849-854
Journal of Experimental and Theoretical Physics - The influence of the Schottky low-energy excitations related to the presence of rare-earth metals on the thermodynamic and kinetic characteristics... 相似文献
6.
Given hereby are the results of mathematical modelling of thermal conditions for the method of travelling temperature field (“travelling wave”). All the estimates have been made for the process of leucosapphire crystallization. Demonstrated are the advantages of the above method as against the horizontally directed crystallization on account of shifting the container. 相似文献
7.
Khazanov EA 《Optics letters》2002,27(9):716-718
Analytical expressions for eigenpolarizations and phase delays in grains of thermally loaded Nd:YAG ceramic rods have been derived. It is shown that the depolarization of radiation in polycrystalline ceramics results in beam modulation with a characteristic size of the order of the ceramic grain size. It is reasonable to increase the ratio of rod length to grain length both to diminish this modulation depth and to compensate for birefringence by use of known techniques. 相似文献
8.
V. N. Kublanovskaya T. N. Smirnova V. B. Khazanov 《Journal of Mathematical Sciences》1980,13(2):261-275
A modification of the Danilewski method is presented, permitting the solution of the eigenvalue problem for a constant sparse matrix of large order to be reduced to the solution of the same problem for a polynomial matrix of lower order. Certain solution algorithms are proposed for a partial eigenvalue problem for the polynomial matrix. Questions of the realization of the algorithms on a model PRORAB computer are examined.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 58, pp. 92–110, 1976. 相似文献
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The polarization thermal self-action of laser radiation propagating in an isotropic crystal has been studied experimentally. New nonlinear effects have been observed for the first time. These effects include a change in the symmetry of the depolarized-field distribution and the qualitative dependence of the degree of the self-induced depolarization on the geometry of the beam and crystal. The classical problem of self-induced depolarization has been analytically solved in the general form for an arbitrary orientation of any cubic crystal. The theoretical results agree well with the experimental data. The optimum orientation of the laser crystal has been determined, which can be effectively used in lasers with high average power. 相似文献