全文获取类型
收费全文 | 214270篇 |
免费 | 2128篇 |
国内免费 | 420篇 |
专业分类
化学 | 112050篇 |
晶体学 | 2404篇 |
力学 | 9987篇 |
综合类 | 11篇 |
数学 | 27645篇 |
物理学 | 64721篇 |
出版年
2021年 | 2203篇 |
2020年 | 2427篇 |
2019年 | 2935篇 |
2018年 | 4098篇 |
2017年 | 4167篇 |
2016年 | 5465篇 |
2015年 | 2911篇 |
2014年 | 4707篇 |
2013年 | 9362篇 |
2012年 | 7806篇 |
2011年 | 9050篇 |
2010年 | 7060篇 |
2009年 | 7113篇 |
2008年 | 8535篇 |
2007年 | 8426篇 |
2006年 | 7559篇 |
2005年 | 6761篇 |
2004年 | 6295篇 |
2003年 | 5502篇 |
2002年 | 5235篇 |
2001年 | 5605篇 |
2000年 | 4231篇 |
1999年 | 3215篇 |
1998年 | 2863篇 |
1997年 | 2735篇 |
1996年 | 2616篇 |
1995年 | 2376篇 |
1994年 | 2365篇 |
1993年 | 2347篇 |
1992年 | 2376篇 |
1991年 | 2639篇 |
1990年 | 2540篇 |
1989年 | 2561篇 |
1988年 | 2451篇 |
1987年 | 2502篇 |
1986年 | 2320篇 |
1985年 | 2918篇 |
1984年 | 2928篇 |
1983年 | 2479篇 |
1982年 | 2571篇 |
1981年 | 2476篇 |
1980年 | 2270篇 |
1979年 | 2520篇 |
1978年 | 2674篇 |
1977年 | 2775篇 |
1976年 | 2837篇 |
1975年 | 2633篇 |
1974年 | 2537篇 |
1973年 | 2748篇 |
1972年 | 2191篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Pomogaev V. A. Lee H. J. Goh E. Tchaikovskaya O. N. Kononov A. I. Avramov P. V. 《Russian Physics Journal》2022,64(11):2076-2081
Russian Physics Journal - Theoretical calculations of excited states in the complexes of gold and silver three-atom nanoclusters with carbon quantum nanodots are performed using the M062X... 相似文献
3.
Palamarchuk I. V. Shulgau Z. T. Sergazy Sh. D. Zhulikeeva A. M. Seilkhanov T. M. Kulakov I. V. 《Russian Journal of General Chemistry》2022,92(9):1692-1705
Russian Journal of General Chemistry - On the basis of 4-(thien-2-yl)-3-aminopyridine-2(1H)-one, the corresponding chloroacetamide and condensed 1H-pyrido[2,3-b][1,4]oxazine-2(3H)-one were... 相似文献
4.
Ramón Fernández-Ruiz 《X射线光谱测定》2022,51(3):279-293
This work describes the basic principles of Total-reflection X-Ray Fluorescence (TXRF) spectrometry and some of its most outstanding applications for investigating metal traces, mainly in biological and biomedical samples. TXRF is an analytical technique that combines the versatility of elemental analysis by X-ray energy dispersion with a low detection limit in the order of picograms of absolute mass or a few ppb (μg L−1) as concentration. The microanalytical capacity of TXRF allows the study of small sample quantities. The TXRF can perform qualitative and mass ratio analyses of the elements present in a sample of only a few hundred nanograms. These properties are of great importance in the research of metal traces in biological systems, as they allow fast, precise, and accurate characterisation of the elemental fingerprint at trace level. Its successful application in studies of the coordination kinetics of new platinum-based antitumor drugs with DNA, its application in the study profile of the metal in healthy and cancerous human tissues, or even its application in the study of the processes of metal diffusion through cell membranes are just a few examples of TXRF capabilities in the biomedical sciences. This brief review's main objective is to provide an overview of the physical principles and possibilities of TXRF spectrometry. It also highlights some of the most outstanding applications that have been developed so far, mainly in the biological field, so that the reader can evaluate their potential applications. 相似文献
5.
Potekaev A. I. Klopotov A. A. Trishkina L. I. Cherkasova T. V. Kulagina V. V. Tazin I. D. 《Russian Physics Journal》2022,65(1):114-122
Russian Physics Journal - The results of a study of the dislocation structure evolution in polycrystals of homogeneous solid solutions in low-stability states in Cu-Mn-based alloys with FCC crystal... 相似文献
6.
Russian Physics Journal - Aiming at problems of low probability of interception and poor anti-jamming performance of the multi-output radar, the numerical simulation based on a chaos optimization... 相似文献
7.
Heßberger F. P. Antalic S. Giacoppo F. Andel B. Ackermann D. Block M. Heinz S. Khuyagbaatar J. Kojouharov I. Venhart M. 《The European Physical Journal A - Hadrons and Nuclei》2022,58(1):1-18
The European Physical Journal A - The goal of the present paper is twofold. First, a novel expansion many-body method applicable to superfluid open-shell nuclei, the so-called Bogoliubov in-medium... 相似文献
8.
Temerdashev Z. A. Musorina T. N. Ovsepyan S. K. Korpakova I. G. 《Journal of Analytical Chemistry》2022,77(5):595-603
Journal of Analytical Chemistry - The work is dedicated to the determination of polyaromatic hydrocarbons (PAHs) in soils and bottom sediments by gas chromatography–mass spectrometry using... 相似文献
9.
Journal of Applied Spectroscopy - IR reflectance spectroscopy at 50–450 cm–1 was used to study homogeneous monocrystals of (FeIn2S3)x?(In2S3)1–x grown by the method of... 相似文献
10.
Fernández Julio R. Gallego Inés Jiménez-Losada Andrés Ordóñez Manuel 《Fuzzy Optimization and Decision Making》2022,21(4):531-551
Fuzzy Optimization and Decision Making - Cost-allocation problems in a fixed network are concerned with distributing the costs for use by a group of clients who cooperate in order to reduce such... 相似文献