全文获取类型
收费全文 | 330篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
化学 | 248篇 |
力学 | 2篇 |
数学 | 34篇 |
物理学 | 49篇 |
出版年
2020年 | 5篇 |
2019年 | 10篇 |
2018年 | 8篇 |
2017年 | 7篇 |
2016年 | 7篇 |
2015年 | 8篇 |
2014年 | 5篇 |
2013年 | 10篇 |
2012年 | 6篇 |
2011年 | 14篇 |
2010年 | 11篇 |
2009年 | 14篇 |
2008年 | 6篇 |
2007年 | 5篇 |
2006年 | 4篇 |
2005年 | 5篇 |
2004年 | 8篇 |
2003年 | 7篇 |
2002年 | 7篇 |
2001年 | 15篇 |
2000年 | 9篇 |
1999年 | 7篇 |
1998年 | 7篇 |
1997年 | 5篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 6篇 |
1991年 | 10篇 |
1990年 | 14篇 |
1989年 | 7篇 |
1988年 | 7篇 |
1987年 | 6篇 |
1986年 | 8篇 |
1985年 | 12篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1981年 | 4篇 |
1980年 | 3篇 |
1979年 | 7篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1974年 | 4篇 |
1973年 | 4篇 |
1972年 | 6篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1969年 | 2篇 |
1968年 | 2篇 |
排序方式: 共有333条查询结果,搜索用时 0 毫秒
41.
E. B. Rakhimova I. V. Vasil’eva L. M. Khalilov A. G. Ibragimov U. M. Dzhemilev 《Russian Journal of Organic Chemistry》2011,47(9):1300-1304
A novel procedure has been developed for selective synthesis of N-aryl-1,3,5-dithiazinanes, 1,2,6,7-tetrahydro-3,5,1,7-benzodithiadiazonine, and 6,7-dihydro-1,3,5,7-benzotrithiazonine by
reactions of aniline derivatives with N-methyl-1,3,5-dithiazinane or 1,3,5-trithiane in the presence of transition and rare earth metal salts and complexes. 相似文献
42.
We find all self-adjoint Dirac Hamiltonians in Coulomb and Aharonov-Bohm potentials in 2+1 dimensions with the fermion spin taken into account. We obtain implicit equations for the spectra and construct eigenfunctions
for all self-adjoint Dirac Hamiltonians in the indicated external fields. We find explicit solutions of the equations for
the spectra in some cases. 相似文献
43.
V. R. Khalilov 《Theoretical and Mathematical Physics》2006,149(3):1726-1740
We obtain exact solutions of the Dirac equation in 2+1 dimensions and the electron energy spectrum in the superposition of
the Aharonov-Bohm and Coulomb potentials, which are used to study the Aharonov-Bohm effect for states with continuous and
discrete energy spectra. We represent the total scattering amplitude as the sum of amplitudes of scattering by the Aharonov-Bohm
and Coulomb potentials. We show that the gauge-invariant phase of the wave function or the energy of the electron bound state
can be observed. We obtain a formula for the scattering cross section of spin-polarized electrons scattered by the Aharonov-Bohm
potential. We discuss the problem of the appearance of a bound state if the interaction between the electron spin and the
magnetic field is taken into account in the form of the two-dimensional Dirac delta function.
__________
Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 149, No. 3, pp. 502–517, December, 2006.
An erratum to this article is available at . 相似文献
44.
V. G. Bagrov V. Ch. Zhukovskii I. M. Ternov V. R. Khalilov 《Russian Physics Journal》1984,27(7):550-553
The fundamental characteristics of electromagnetic processes are considered in the presence of an external magnetic field in which electron (positron) self-polarization occurs.From material of a report to the All-Union Conference on Investigation of Spin Phenomena in High-Energy Physics (Protvino, November, 1982).Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 12–16, July, 1984. 相似文献
45.
F. Z. Galin Yu. A. Kashina R. A. Zainullin O. S. Kukovinets L. M. Khalilov G. A. Tolstikov 《Russian Chemical Bulletin》1998,47(1):185-186
The reaction of car-3-ene-2,5-dione (1), an oxidation product of (+)-car-3-ene, with lithium acetylides proceeds stereospecifically, but not regioselectively, to
give only mixtures of regioisomeric acetylenic alcohols with thesyn-orientation of the hydroxy group.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 183–185, January, 1998. 相似文献
46.
Different methods of generating electromagnetic radiation in connection with the motion of electrons in external electromagnetic fields are discussed in this paper.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 5–31, February, 1980. 相似文献
47.
48.
G. A. Tolstikov A. Yu. Spivak L. M. Khalilov E. V. Vasil'eva S. I. Lomakina I. A. Ivanova 《Russian Chemical Bulletin》1985,34(8):1662-1667
Conclusions The reactions of nopyl tosylates and 4-hydroxymethyl-2-carene with Et3Al and (i-Bu)3Al are accompanied by skeletal rearrangements, leading to bi- and tricyclic hydrocarbons, containing small rings. The previously unknown rearrangement of nopyl tosylate into brendane series of hydrocarbons has been established.For Communication 4, see [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1814–1820, August, 1985. 相似文献
49.
The methods of classical electrodynamics are used to consider the problem of the radiation from an electron moving in the field of a monochromatic circularly polarized wave and a uniform magnetic field directed parallel to the direction of propagation of the wave. Expressions for the total radiation intensity and for the angular spectral distribution of the radiation are derived. Certain particular cases are studied. 相似文献
50.