全文获取类型
收费全文 | 1029篇 |
免费 | 0篇 |
专业分类
化学 | 408篇 |
晶体学 | 28篇 |
力学 | 42篇 |
数学 | 210篇 |
物理学 | 341篇 |
出版年
2021年 | 12篇 |
2020年 | 16篇 |
2019年 | 19篇 |
2018年 | 35篇 |
2017年 | 26篇 |
2016年 | 30篇 |
2015年 | 11篇 |
2014年 | 26篇 |
2013年 | 37篇 |
2012年 | 33篇 |
2011年 | 48篇 |
2010年 | 37篇 |
2009年 | 37篇 |
2008年 | 37篇 |
2007年 | 36篇 |
2006年 | 38篇 |
2005年 | 31篇 |
2004年 | 19篇 |
2003年 | 26篇 |
2002年 | 18篇 |
2001年 | 31篇 |
2000年 | 22篇 |
1999年 | 10篇 |
1998年 | 14篇 |
1997年 | 14篇 |
1996年 | 14篇 |
1995年 | 13篇 |
1994年 | 8篇 |
1991年 | 10篇 |
1990年 | 17篇 |
1989年 | 16篇 |
1988年 | 14篇 |
1987年 | 12篇 |
1986年 | 12篇 |
1985年 | 12篇 |
1984年 | 8篇 |
1983年 | 16篇 |
1982年 | 13篇 |
1981年 | 7篇 |
1980年 | 17篇 |
1979年 | 18篇 |
1978年 | 18篇 |
1977年 | 18篇 |
1976年 | 21篇 |
1975年 | 13篇 |
1974年 | 11篇 |
1973年 | 9篇 |
1970年 | 10篇 |
1969年 | 7篇 |
1968年 | 10篇 |
排序方式: 共有1029条查询结果,搜索用时 31 毫秒
41.
Larionov S. V. Leonova T. G. Glinskaya L. A. Klevtsova R. F. Platonov V. E. Maksimov A. M. Fadeeva V. P. Batrachenko N. I. 《Russian Journal of Coordination Chemistry》2000,26(12):861-865
Compounds (CH3)2Sn(C12F9S)2 (I), (CH3)2Sn(C10F7S)2 (II), and (C2H5)2Sn(C10F7S)2 (III) were synthesized. Single crystals of Iwere grown and structurally characterized using X-ray diffraction analysis (1590 reflections, R = 0.0209). The crystals are orthorhombic, a = 40.848(8) Å, b = 6.058(1) Å, c = 11.183(2) Å, V = 2767(1) Å3, (calcd.) = 2.024 g/cm3, space group Pbcn, Z = 4. The structure is built from monomeric molecules. The coordination polyhedron of the Sn atom (the SnC2S2 core) is a distorted tetrahedron. Compounds I–III are volatile when heated in vacuo. Thermolysis of these compounds results in SnO2 (in air) or SnS2 (in argon). 相似文献
42.
Technical Physics - Taking damping into account in the problems of structural dynamics is an important and nontrivial problem. Its complexity is primarily determined by the required specification... 相似文献
43.
Data on the degradation kinetics of two organic dyes in a mixture by the action of electrical underwater discharges and ozone are presented. It has been found that the rate of degradation by the to combined treatment of the both dyes with face discharge and ozone is five times the sum of degradation rates expected on the assumption of the additive effect of each of these factors. 相似文献
44.
G. V. Kuznetsov V. I. Maksimov M. A. Sheremet 《Journal of Applied Mechanics and Technical Physics》2013,54(4):588-595
An experimental and numerical analysis was performed to investigate the laminar regimes of conjugate thermogravitational convection in a closed parallelepiped with heat-conducting walls of finite thickness in the presence of a local energy source with convective heat exchange with the environment. The numerical studies were performed using the Fluent software. The experimental data and numerical results agree well each other. 相似文献
45.
46.
47.
O. G. Maksimova T. O. Petrova A. V. Maksimov 《Bulletin of the Russian Academy of Sciences: Physics》2013,77(8):1068-1070
The ordering of ferroelectric and antiferroelectric polymer systems in an external electric field is studied by the Monte Carlo method. The threshold value of electric field strength at which the antiparallel packing of chains is converted into parallel is calculated. The hysteresis curves are studied and compared to experimental data. 相似文献
48.
49.
Yu. M. Maksimov O. V. Lapshin 《Russian Journal of Physical Chemistry B, Focus on Physics》2015,9(6):921-925
The modes of spin gasless combustion of plate- and disk-shaped Ti–2B–Cu samples are investigated using frame-by-frame filming. The combustion process takes place under unsteady conditions. An increase in the diameter of the reaction sample makes the pattern of movement of the reaction front more complicated. 相似文献
50.
E. R. Naranov V. O. Samoilov O. V. Golubev K. L. Zanaveskin A. L. Maksimov E. A. Karakhanov 《Russian Journal of Applied Chemistry》2018,91(10):1688-1693
Possibility of using mesoporous materials for obtaining Ni–Mo sorption-catalytic materials for purification of medium-distillate fractions to remove arsenic-containing compounds was examined. It was shown that, in the course of hydropurification, the acidity of the mesoporous material does not directly affect the extent to which the amount of arsenic in hydrocarbons is diminished. It was found that mesoporous supports of the SBA-15, TUD, and MCF types reduce the content of arsenic to less than 0.5 ppm at 360°C and 50 atm of H2. 相似文献