全文获取类型
收费全文 | 10391篇 |
免费 | 421篇 |
国内免费 | 61篇 |
专业分类
化学 | 7005篇 |
晶体学 | 49篇 |
力学 | 337篇 |
数学 | 1963篇 |
物理学 | 1519篇 |
出版年
2023年 | 70篇 |
2022年 | 67篇 |
2021年 | 189篇 |
2020年 | 191篇 |
2019年 | 200篇 |
2018年 | 198篇 |
2017年 | 155篇 |
2016年 | 385篇 |
2015年 | 335篇 |
2014年 | 333篇 |
2013年 | 631篇 |
2012年 | 744篇 |
2011年 | 811篇 |
2010年 | 489篇 |
2009年 | 464篇 |
2008年 | 694篇 |
2007年 | 656篇 |
2006年 | 608篇 |
2005年 | 536篇 |
2004年 | 478篇 |
2003年 | 360篇 |
2002年 | 319篇 |
2001年 | 158篇 |
2000年 | 138篇 |
1999年 | 107篇 |
1998年 | 98篇 |
1997年 | 84篇 |
1996年 | 125篇 |
1995年 | 77篇 |
1994年 | 100篇 |
1993年 | 76篇 |
1992年 | 77篇 |
1991年 | 71篇 |
1990年 | 72篇 |
1989年 | 56篇 |
1988年 | 51篇 |
1987年 | 50篇 |
1986年 | 40篇 |
1985年 | 62篇 |
1984年 | 78篇 |
1983年 | 45篇 |
1982年 | 58篇 |
1981年 | 38篇 |
1980年 | 42篇 |
1979年 | 31篇 |
1978年 | 33篇 |
1977年 | 33篇 |
1975年 | 16篇 |
1974年 | 15篇 |
1973年 | 16篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Gallaugher Michael P. B. Tomarchio Salvatore D. McNicholas Paul D. Punzo Antonio 《Advances in Data Analysis and Classification》2022,16(4):1097-1097
Advances in Data Analysis and Classification - In the original publication of the article, the line after equation (5) has been published incorrectly 相似文献
2.
Peralta Cecilia Mariana Acosta Gimena Henestrosa Cecilia Gil Raúl Andrés Fernández Liliana Patricia 《Journal of Analytical Chemistry》2022,77(3):308-317
Journal of Analytical Chemistry - The present development involved a flow injection strategy using a mini-column of multiwalled carbon nanotubes and fluorescent detection (λex of 283 nm,... 相似文献
3.
Cardin Pedro Toniol Teixeira Marco Antonio 《Journal of Dynamics and Differential Equations》2022,34(2):775-787
Journal of Dynamics and Differential Equations - In this paper we focus on a class of symmetric vector fields in the context of singularly perturbed fast-slow dynamical systems. Our main question... 相似文献
4.
Bazarra Noelia Castejón Alberto Fernández José R. Quintanilla Ramón 《Meccanica》2021,56(12):3025-3037
Meccanica - In this work we study, from the numerical point of view, a one-dimensional thermoelastic problem where the thermal law is of type III. Quasi-static microvoids are also assumed within... 相似文献
5.
Ojo Oluwasegun Taiwo Fernández Anta Antonio Lillo Rosa E. Sguera Carlo 《Advances in Data Analysis and Classification》2022,16(3):725-760
Advances in Data Analysis and Classification - We propose two new outlier detection methods, for identifying and classifying different types of outliers in (big) functional data sets. The proposed... 相似文献
6.
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
7.
8.
Di Turo Francesca Parra Rafael Piquero-Cilla Joan Favero Gabriele Doménech-Carbó Antonio 《Journal of Solid State Electrochemistry》2019,23(3):771-781
Journal of Solid State Electrochemistry - Electrochemical impedance spectroscopy (EIS) and voltammetry of immobilized particles (VIMP) measurements using air-saturated mineral water and... 相似文献
9.
Domnech-Carb Antonio Domnech-Casass Clara Pontones Jos Lus Ramos David 《Journal of Solid State Electrochemistry》2020,24(11):2853-2860
An electrochemical method for discriminating healthy and malignant tissues in prostate biopsies using the voltammetry of immobilized particles methodology is described. The method involves the sampling with graphite bars 0.5 mm in diameter on paraffin-impregnated cross sections of prostate tissues used in ordinary cytological evaluation after local staining with methylene blue (MB). The subsequent record of the voltammetric response of sample-modified graphite electrodes displays clearly different MB-centered features for healthy and malignant regions due to the different association of the dye to the respective cells.
相似文献10.