全文获取类型
收费全文 | 3489篇 |
免费 | 4篇 |
专业分类
化学 | 1635篇 |
晶体学 | 14篇 |
力学 | 333篇 |
数学 | 575篇 |
物理学 | 936篇 |
出版年
2014年 | 18篇 |
2013年 | 17篇 |
2011年 | 16篇 |
2009年 | 14篇 |
2008年 | 23篇 |
2007年 | 21篇 |
2006年 | 71篇 |
2005年 | 17篇 |
2004年 | 30篇 |
2003年 | 29篇 |
2002年 | 63篇 |
2001年 | 66篇 |
2000年 | 84篇 |
1999年 | 60篇 |
1998年 | 70篇 |
1997年 | 70篇 |
1996年 | 56篇 |
1995年 | 56篇 |
1994年 | 61篇 |
1993年 | 67篇 |
1992年 | 104篇 |
1991年 | 117篇 |
1990年 | 90篇 |
1989年 | 92篇 |
1988年 | 71篇 |
1987年 | 85篇 |
1986年 | 103篇 |
1985年 | 112篇 |
1984年 | 91篇 |
1983年 | 99篇 |
1982年 | 90篇 |
1981年 | 81篇 |
1980年 | 78篇 |
1979年 | 93篇 |
1978年 | 98篇 |
1977年 | 103篇 |
1976年 | 117篇 |
1975年 | 117篇 |
1974年 | 89篇 |
1973年 | 108篇 |
1972年 | 83篇 |
1971年 | 106篇 |
1970年 | 124篇 |
1969年 | 73篇 |
1968年 | 49篇 |
1967年 | 27篇 |
1966年 | 19篇 |
1965年 | 21篇 |
1964年 | 14篇 |
1963年 | 15篇 |
排序方式: 共有3493条查询结果,搜索用时 15 毫秒
31.
S. É. Lapin 《Mathematical Notes》1993,54(1):701-704
Translated from Matematicheskie Zametki, Vol. 54, No. 1, pp. 52–56, July, 1993. 相似文献
32.
33.
Precipitate-forming chemical reactions have been studied in chemically cross-linked poly(vinyl alcohol) gel medium. One of the reactive components was incorporated into the gel, the other was allowed to diffuse into it. Depending on the experimental conditions the reaction-diffusion process often results in patterns of different type. Experiments performed in tubes and in thin layers were carried out in order to investigate the effects of various factors (cross-linking density, swelling degree as well as the concentrations of the outer and inner electrolytes) on the morphologies of the precipitate patterns. It was found that precipitation occurs not only in the Liesegang bands, but also between bands. Beside Liesegang-type structures, tree-like patterns have been observed, showing a characteristic periodicity in the density profile obtained by digitalized image analyses. 相似文献
34.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 56, No. 2, pp. 268–273, February, 1992. 相似文献
35.
36.
Studies of the influence of plastic deformation and the straining temperature on the temperature dependence of the stresses
developed in titanium nickelide shape memory alloys are described.
Zh. Tekh. Fiz. 68, 141–142 (July 1998) 相似文献
37.
38.
É. Kh. Absalyamova Yu. I. Kol'tsov N. P. Matshina E. A. Nesmelov N. N. Soboleva 《Journal of Applied Spectroscopy》1991,54(1):79-83
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 54, No. 1, pp. 103–107, January, 1991. 相似文献
39.
40.
V. É. Distanov A. G. Kirdyashkin 《Journal of Applied Mechanics and Technical Physics》1998,39(1):85-90
In model experiments, the layer of melt bounded by the crystallization front and the heater for heating the diaphragm in a
growing furnace is shown to determine crystal growth by the Stockbarger method under conditions of induced convection and
also to control the crystallization process. The free volume of the melt exerts no effect on its hydrodynamic and thermal
structures. Optimum values of the exposure time are estimated for constant maximum and minimum velocities of modulated rotation
of the growing ampoule.
Institute of Mineralogy and Petrography, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090. Translated from
Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 39, No. 1, pp. 98–104, January–February, 1998. 相似文献