全文获取类型
收费全文 | 286篇 |
免费 | 3篇 |
专业分类
化学 | 166篇 |
晶体学 | 1篇 |
力学 | 6篇 |
数学 | 8篇 |
物理学 | 108篇 |
出版年
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 5篇 |
2019年 | 3篇 |
2018年 | 2篇 |
2016年 | 9篇 |
2015年 | 3篇 |
2014年 | 5篇 |
2013年 | 7篇 |
2012年 | 5篇 |
2011年 | 16篇 |
2010年 | 16篇 |
2009年 | 8篇 |
2008年 | 14篇 |
2007年 | 14篇 |
2006年 | 9篇 |
2005年 | 7篇 |
2004年 | 8篇 |
2003年 | 7篇 |
2002年 | 12篇 |
2001年 | 10篇 |
2000年 | 12篇 |
1999年 | 2篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1995年 | 6篇 |
1994年 | 5篇 |
1993年 | 5篇 |
1992年 | 4篇 |
1990年 | 2篇 |
1989年 | 7篇 |
1986年 | 6篇 |
1985年 | 2篇 |
1984年 | 5篇 |
1983年 | 2篇 |
1982年 | 5篇 |
1980年 | 7篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1977年 | 3篇 |
1975年 | 5篇 |
1972年 | 1篇 |
1971年 | 6篇 |
1970年 | 3篇 |
1969年 | 2篇 |
1968年 | 3篇 |
1967年 | 1篇 |
1966年 | 2篇 |
1961年 | 2篇 |
排序方式: 共有289条查询结果,搜索用时 15 毫秒
61.
Romanova I. P. Yusupova G. G. Fattakhov S. G. Nafikova A. A. Kovalenko V. I. Yanilkin V. V. Kataev V. E. Azancheev N. M. Reznik V. S. Sinyashin O. G. 《Russian Chemical Bulletin》2001,50(3):445-452
N-Isocyanurato-substituted aziridino[1,2][60]fullerenes were synthesized for the first time as the main products by the reaction of isocyanurato-substituted azides with C60. The thermal stability and the electrochemical behavior of the compounds synthesized were studied. 相似文献
62.
V. S. Reznik V. D. Akamsin I. V. Galyametdinova A. V. Chernova R. R. Shagidullin 《Russian Chemical Bulletin》2000,49(3):490-494
A method for the synthesis of hypotensive alkyl(phenyl)[ω-(N-phenylpiperazino)alkyl]-phosphine oxides by reacting alkyl(ω-haloalkyl)phenylphosphine oxides withN-phenylpiperazine was elaborated. Phenyl[γ-(N-phenylpiperazino)propyl]propylphosphine oxide reacts with alkyl halides to give [γ-(N-alkyl-N′-phenylpiperazinio)propyl]phenyl(propyl)oxophosphine halides.
For Part 1 see Ref. 1.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 488–492, March, 2000. 相似文献
63.
V. S. Reznik Ya. A. Levin V. D. Akamsin I. V. Galyametdinova R. I. Pyrkin 《Russian Chemical Bulletin》2000,49(3):495-498
Primary alkylamines, β-aryloxyethylamines, orN-[β-(2-methoxyphenoxy)ethyl]-α,ω-diaminoalkanes react with alkyl divinyl phosphinates or phenyl(divinyl)phosphine oxide to give the corresponding 4-alkoxy(4-phenyl)-1-alkyl-4-oxo-1,4-azaphosphorinanes. Reactions of the latter with mono- or dihaloalkanes afford 4-phosphapiperidinium halides. 1,4-Azaphosphorinanes containing a β-aryloxyethyl fragment exhibit hypotensive activity. 相似文献
64.
International Applied Mechanics - The problem of analysis of creep strains in thin-walled tubular elements made of linearly viscoelastic materials under uniaxial tension, pure torsion, and combined... 相似文献
65.
G.M. Reznik 《International Journal of Non》1984,19(2):95-113
The derivation of the transfer equation based on analysis of the equations for spectral semi-invariant and not invoking equations for realization of the random wave field is presented. Uniformly valid asymptotic expansions for the third and the fourth spectral semi-invariant are constructed using the multiple scale method and the matched asymptotic expansion method. This approach makes it possible to investigate the boundary layer in a neighbourhood of the resonant surface where intensive growth in time of the third spectral semi-invariant occurs. This boundary layer defines the form of the transfer equations. An analogous boundary layer for the fourth spectral semiinvariant and its influence on the second and the third spectral semi-invariants are also investigated. 相似文献
66.
67.
68.
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, p. 975, April, 1989. 相似文献
69.
Theoretical and experimental investigations demonstrate the prospects of near-field microwave location of malignant tumors
in biological tissue. The theoretical analysis is performed in terms of the theory of near-field location developed for layered
structures. The experimental verification of the theory is accomplished by sounding an aqueous medium with a controllable
permittivity. The tumor contrast is calculated based on the ideas of the dielectric properties of healthy and affected human
tissues. The reason for and the degree of background contrasts as applied to near-field measurements are studied experimentally.
An optimal measuring scheme for minimizing the masking effect of background contrasts is proposed. The 2D images of a tumor-simulating
contrast object immersed in the aqueous medium at different depths are obtained. The prospects of near-field diagnostics for
subsurface temperature measurement are discussed. 相似文献
70.
V. A. Gorodtsov S. N. Reznik Yu. A. Stepanyants 《Journal of Experimental and Theoretical Physics》1997,85(2):276-284
Both components of the total radiative force acting on uniformly moving mass sources in a stratified incompressible fluid
are calculated. These forces are related to the emission of internal gravity waves. One component of the radiative force is
directed opposite to the direction of motion. This is the well-known wave drag force. Different useful representations of
this component are derived for several typical point sources (monopole, dipole, and others). The other component, directed
perpendicular to the direction of the motion, is calculated for the first time. The results obtained are extended to the case
of rotating media, where internal inertial-gravity waves exist.
Zh. éksp. Teor. Fiz. 112, 507–523 (August 1997) 相似文献