全文获取类型
收费全文 | 573篇 |
免费 | 2篇 |
专业分类
化学 | 310篇 |
晶体学 | 4篇 |
力学 | 23篇 |
数学 | 67篇 |
物理学 | 171篇 |
出版年
2022年 | 4篇 |
2021年 | 9篇 |
2020年 | 6篇 |
2019年 | 8篇 |
2018年 | 12篇 |
2017年 | 12篇 |
2016年 | 11篇 |
2014年 | 9篇 |
2013年 | 19篇 |
2012年 | 17篇 |
2011年 | 16篇 |
2010年 | 24篇 |
2009年 | 28篇 |
2008年 | 28篇 |
2007年 | 21篇 |
2006年 | 14篇 |
2005年 | 12篇 |
2004年 | 11篇 |
2003年 | 15篇 |
2002年 | 23篇 |
2001年 | 12篇 |
2000年 | 13篇 |
1999年 | 8篇 |
1998年 | 11篇 |
1997年 | 8篇 |
1996年 | 3篇 |
1995年 | 13篇 |
1994年 | 8篇 |
1993年 | 9篇 |
1992年 | 13篇 |
1991年 | 14篇 |
1990年 | 8篇 |
1989年 | 16篇 |
1988年 | 14篇 |
1987年 | 13篇 |
1986年 | 12篇 |
1985年 | 10篇 |
1984年 | 10篇 |
1983年 | 10篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1977年 | 8篇 |
1976年 | 8篇 |
1975年 | 7篇 |
1974年 | 7篇 |
1973年 | 7篇 |
1970年 | 5篇 |
1968年 | 3篇 |
排序方式: 共有575条查询结果,搜索用时 15 毫秒
61.
A. N. Isaev 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(3):434-443
Quantum chemical calculations of the molecular complexes (NH3)3Zn2+...(H2O)n3...NH3 (Cn, n=11, 16, 21, and 30) that model the proton donor-aqueous chain-acceptor channel in biological molecules were performed. Periodicity of O-H bond lengths in water chains and charges of the H atoms of H-bonds observed earlier were discussed. In Cn complexes, the geometry and electronic structure of the ionic defect in the aqueous chain with an excess proton were studied. The distributions of O-H bond lengths and charges on H-bond H atoms in the region of the ionic defect obtained in ab initio (B3LYP/6-31+G**) and semiempirical (PM3) calculations are compared. The influence of aqueous chain extension, the position of the protonated water molecule, and the mobility of water molecules in the chain on the structure of the ionic defect was analyzed. 相似文献
62.
Moscow University Chemistry Bulletin - Currently, the issue of minimizing the environmental impact of anthropogenic activities and improving the quality of water resources is topical. The paper... 相似文献
63.
A model of a closed fermionic string (FS) is studied within the superfield canonical approach in the framework of which a general solution is found to Hamilton's equations of motion. An auxiliary spectral problem for the FS-theory is formulated and an infinite set of conservation laws is constructed. Also, a method is proposed for constructing classical analogues of vertex operators describing the FS-massless field coupling. 相似文献
64.
Rasulov S. M. Orakova S. M. Isaev Z. A. 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2017,91(2):330-335
Russian Journal of Physical Chemistry A - The Р, ρ, and Т-properties of a water + n-hexane system immiscible under normal conditions are measured piezometrically in the water mole... 相似文献
65.
F. G. Gasanova F. F. Orudzhev Z. M. Aliev A. B. Isaev 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2012,86(3):495-497
The influence of the oxygen pressure on the photochemical oxidation of phenol is investigated. It is shown that raising the
oxygen pressure from 0.1 to 0.7 MPa leads to an increase in the photochemical oxidation of phenol by a factor of approximately
3.7. 相似文献
66.
67.
A. P. Isaev 《Theoretical and Mathematical Physics》2007,150(2):187-202
We consider integrable open chain models formulated in terms of the generators of affine Hecke algebras. We use the fusion
procedure to construct the hierarchy of commutative elements, which are analogues of the commutative transfer matrices. These
elements satisfy a set of functional relations generalizing functional relations for a family of transfer matrices in solvable
spin chain models of the Uq(gl(n|m)) type.
__________
Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 150, No. 2, pp. 219–236, February, 2007. 相似文献
68.
V. D. Okunev N. N. Pafomov V. A. Isaev T. A. D’yachenko A. Klimov S. J. Lewandowski 《Physics of the Solid State》2002,44(1):157-161
This paper reports on new results of experimental investigations into the nature of the electrical resistivity ρ(T) ? const at T<T crit for YBaCuO and LaSrMnO dielectric films. The films are prepared by pulsed laser deposition and contain nanocrystalline clusters with metallic conductivity. Dependences of the electrical resistivity ρ(T) ? const are observed for the epitaxial films YBaCuO (T crit=10 K) with a tetragonal structure after exposure to KrF excimer laser radiation and for the as-prepared amorphous films LaSrMnO (T crit?160 K). The effect of interest (ρ(T) ? const) manifests itself in the case when the optical spectra of the studied samples contain portions attributed to absorption by free charge carriers. The inference is made that this effect can be associated with tunneling conduction in a system of quantum dots. 相似文献
69.
70.
S. M. Rasulov I. A. Isaev 《Russian Journal of Physical Chemistry B, Focus on Physics》2013,7(8):895-900
The thermal properties of binary n-pentane-water (1: 4, wt.) system, as well as hydrocarbon liquid-vapor and aqueous liquid-vapor phase equilibria, were studied in the temperature range between 303 and 674 K under pressures (up to 60 MPa) along nine different isochores. The phase-equilibrium lines and critical points for the system were obtained, and the phase diagrams are described. 相似文献