全文获取类型
收费全文 | 113584篇 |
免费 | 1017篇 |
国内免费 | 257篇 |
专业分类
化学 | 60785篇 |
晶体学 | 1673篇 |
力学 | 4378篇 |
综合类 | 12篇 |
数学 | 13693篇 |
物理学 | 34317篇 |
出版年
2022年 | 794篇 |
2021年 | 1308篇 |
2020年 | 1436篇 |
2019年 | 1708篇 |
2018年 | 2503篇 |
2017年 | 2665篇 |
2016年 | 3449篇 |
2015年 | 1744篇 |
2014年 | 2879篇 |
2013年 | 5281篇 |
2012年 | 4788篇 |
2011年 | 5439篇 |
2010年 | 4519篇 |
2009年 | 4401篇 |
2008年 | 5199篇 |
2007年 | 5041篇 |
2006年 | 4839篇 |
2005年 | 4081篇 |
2004年 | 3597篇 |
2003年 | 3047篇 |
2002年 | 3035篇 |
2001年 | 2703篇 |
2000年 | 2352篇 |
1999年 | 1715篇 |
1998年 | 1666篇 |
1997年 | 1624篇 |
1996年 | 1252篇 |
1995年 | 1036篇 |
1994年 | 1009篇 |
1993年 | 983篇 |
1992年 | 1049篇 |
1991年 | 1104篇 |
1990年 | 1051篇 |
1989年 | 1051篇 |
1988年 | 968篇 |
1987年 | 933篇 |
1986年 | 865篇 |
1985年 | 1141篇 |
1984年 | 1209篇 |
1983年 | 1007篇 |
1982年 | 1100篇 |
1981年 | 964篇 |
1980年 | 971篇 |
1979年 | 1006篇 |
1978年 | 1134篇 |
1977年 | 1167篇 |
1976年 | 1014篇 |
1975年 | 941篇 |
1974年 | 958篇 |
1973年 | 919篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Mazurenko V. V. Kvashnin Y. O. Lichtenstein A. I. Katsnelson M. I. 《Journal of Experimental and Theoretical Physics》2021,132(4):506-516
Journal of Experimental and Theoretical Physics - Dzyaloshinskii–Moriya interaction, DMI in short, represents an antisymmetric type of magnetic interactions that favor orthogonal orientation... 相似文献
2.
Gaineev A. M. Galkina I. V. Davletshin R. R. Davletshina N. V. Kuznetsov N. O. Grishaev D. Yu. Shulayeva M. P. Pozdeev O. K. 《Russian Journal of General Chemistry》2022,92(7):1208-1213
Russian Journal of General Chemistry - Aminophosphabetaines, i.e., isobutyl {[alkyl(dimethyl)ammonio]methyl}phosphonates with higher alkyl substituents at the nitrogen atom, were obtained by a... 相似文献
3.
Kinetics and Catalysis - The results of studies in the field of synthesis and characterization of layered double hydroxides (LDHs) obtained using solid-phase reactions are summarized. The effect of... 相似文献
4.
Hassan E. A. M. Elabid A. E. A. Bashier E. O. Elagib T. H. H. 《Mechanics of Composite Materials》2022,58(2):261-270
Mechanics of Composite Materials - Carbon fiber (CF)/ polyamide (PA6) composites are one of the most promising thermoplastic materials for automobile applications. However, the interfacial... 相似文献
5.
Differential Equations - For a spectrally controllable linear autonomous system with incommensurable delays, we construct a dynamic state feedback in the form of a differential-difference... 相似文献
6.
Tsyganova S. I. Fetisova O. Yu. Mazurova E. N. Taran O. P. Kuznetsov B. N. 《Russian Journal of Applied Chemistry》2022,95(3):408-416
Russian Journal of Applied Chemistry - A method for the disposal of hydrolysis lignin waste based on its modification with ZnCl2 and FeCl3 and subsequent carbonization at 800°C was proposed.... 相似文献
7.
Mathematical Notes - Subspaces of the space of analytic functions on a convex domain in the complex plane that are invariant with respect to the differentiation operator are studied. The problem of... 相似文献
8.
Mohammad A. Khalilzadeh Soo Young Kim Ho Won Jang Rafael Luque Rajender S. Varma Richard A. Venditti Mohammadreza Shokouhimehr 《Materials Today Chemistry》2022
The requirement of green and sustainable materials to prepare heterogeneous catalysts has intensified for practical reasons over the past few decades. Carbohydrates are possibly the most plentiful and renewable organic materials in nature with inimitable physiochemical properties, plausible low-cost and large-scale production, and sustainability features could be exploited in the generation of nanostructured heterogeneous catalysts. This review article outlines the organic transformations catalyzed by diverse carbohydrate-based nanostructured catalysts in greener and environmentally friendly processes. Selected examples are highlighted for a variety of organic reactions exploiting the proposed catalysts’ reactivity and reusability, and interactions with the intrinsic nature of the applied carbohydrate supports; advantages and speculated challenges of the introduced catalysts are deliberated as well. 相似文献
9.
JETP Letters - Extraordinary multiparticle effects in quantizing magnetic fields that are manifested in strongly interacting two-dimensional electron systems in MgZnO/ZnO heterostructures have been... 相似文献
10.
Kopytov G. F. Malyshko V. V. Goryachko A. I. Sharafan M. V. Churkina A. V. Moiseev A. V. Shashkov D. I. Lyasota O. M. 《Russian Physics Journal》2021,64(2):255-260
Russian Physics Journal - The specific features of the sorption activity of silver nanoparticles (AgNPs) on biodegradable polymers of natural (collagen) and artificial (polyamide 6.6) origin have... 相似文献