全文获取类型
收费全文 | 5545篇 |
免费 | 100篇 |
国内免费 | 14篇 |
专业分类
化学 | 3657篇 |
晶体学 | 46篇 |
力学 | 79篇 |
数学 | 916篇 |
物理学 | 961篇 |
出版年
2019年 | 41篇 |
2016年 | 81篇 |
2015年 | 61篇 |
2014年 | 81篇 |
2013年 | 162篇 |
2012年 | 162篇 |
2011年 | 194篇 |
2010年 | 115篇 |
2009年 | 106篇 |
2008年 | 183篇 |
2007年 | 176篇 |
2006年 | 181篇 |
2005年 | 168篇 |
2004年 | 174篇 |
2003年 | 151篇 |
2002年 | 146篇 |
2001年 | 97篇 |
2000年 | 125篇 |
1999年 | 84篇 |
1998年 | 84篇 |
1997年 | 74篇 |
1996年 | 98篇 |
1995年 | 125篇 |
1994年 | 106篇 |
1993年 | 76篇 |
1992年 | 89篇 |
1991年 | 84篇 |
1990年 | 78篇 |
1989年 | 91篇 |
1988年 | 94篇 |
1987年 | 75篇 |
1986年 | 76篇 |
1985年 | 110篇 |
1984年 | 82篇 |
1983年 | 98篇 |
1982年 | 111篇 |
1981年 | 98篇 |
1980年 | 88篇 |
1979年 | 101篇 |
1978年 | 76篇 |
1977年 | 77篇 |
1976年 | 67篇 |
1975年 | 61篇 |
1974年 | 73篇 |
1973年 | 73篇 |
1972年 | 44篇 |
1971年 | 56篇 |
1970年 | 41篇 |
1968年 | 39篇 |
1966年 | 39篇 |
排序方式: 共有5659条查询结果,搜索用时 0 毫秒
1.
2.
Werner Leißner 《Results in Mathematics》1991,20(1-2):530-537
3.
We relate the Schramm–Loewner Evolution processes (SLE) to highest-weight representations of the Virasoro Algebra. The restriction properties of SLE that have been recently derived in [19] play a crucial role. In this setup, various considerations from conformal field theory can be interpreted and reformulated via SLE. This enables one to make a concrete link between the two-dimensional discrete critical systems from statistical physics and conformal field theory. To cite this article: R. Friedrich, W. Werner, C. R. Acad. Sci. Paris, Ser. I 335 (2002) 947–952. 相似文献
4.
Viviane Van Hoof Hugo Cluckers Vera Verhaeghe An Hennebel Marleen Truyens Edith Van Loock Pierre Rombouts Dirk Maes Jan Van Elven Katrien Lesage Mark Flothmann Lieve Nijs Filip Colpaert Werner Vercammen Dominique Bolain 《Accreditation and quality assurance》2004,10(1-2):55-59
In response to a change of the Belgian National Directives whereby hospital laboratories became responsible for all point-of-care testing (POCT) performed within hospital walls a standardized and automated POC glucose-testing system was implemented in our hospital. The system consists of 50 AccuCheck Inform instruments (Roche Diagnostics, Vilvoorde, Belgium), 50 docking stations, a DataCare Server, and connections to the medical laboratory information system (MOLIS, Sysmex, Barchon, Belgium) and to the hospital information system. Implementation involved many parties and extensive preparation and communication. Key issues were bar-coded patient and user identification, training, and responsibilities. One year after the hospital wide implementation of this system the quality of POC glucose testing has significantly increased, thereby improving patient safety. This study describes a stepwise change over involving the medical laboratory and with a focus on hands-on quality.Presented at the ninth conference on Quality in the Spotlight, 18–19 March 2004, Antwerp, Belgium. 相似文献
5.
We examine certain special features exhibited by various classes of linear operators acting in a hereditarily indecomposable
Banach space. For instance, we show that the family of all Riesz operators in a H.I. space forms a closed, 2-sided ideal.
We also give further characterizations of the class of scalar-type spectral operators (to those already given in [16]). The
final section discusses some properties of the spectral maximal spaces of (necessarily decomposable) linear operators in such
spaces.
Conferenza tenuta il 16 settembre 1997
The support of the German Academic Exchange Scheme (DAAD) is gratefully acknowledged 相似文献
6.
Synthesis and Properties of the Layered Perovskite Phase Sr3Mo1.5Zn0.5O7‐δ The new layered perovskite phase Sr3Mo1.5Zn0.5O7‐δ was synthesized by solid state reaction using a Zn/ZnO oxygen buffer. The crystal structure was refined from X‐ray powder pattern by the Rietveld method. The compound crystallizes tetragonal in the space group I4/mmm (no. 139) with the lattice parameters a = 3.9631(3) Å, c = 20.583(1) Å. An oxygen deficiency corresponding to δ ≈ 0.25 was determinated, indicating the presence of molybdenum in mixed valence (Mo4+ and Mo6+). 相似文献
7.
8.
Werner WinterGünther W.H Höhne 《Thermochimica Acta》2003,403(1):43-53
A method for measuring heat capacities of small samples using a chip-calorimeter and a heat pulse technique is described. The theoretical background to calculate the heat transport properties and the heat capacity of the sample from the pulse response function is given. Problems and potentials of the method are discussed. An example is given. 相似文献
9.
Klaus Anderle Richard Birenheide Martin J. A. Werner Joachim H. Wendorff 《Liquid crystals》1991,9(5):691-699
Polarized light leads to an effective reorientation of the optic axis in the glassy state of liquid-crystalline side chain polymers containing azobenzene mesogenic groups, via a trans-cis and cis-trans isomerization. Using a combination of U V and IR dichroitic studies it is shown for copolymers consisting of chromophores (azobenzene) and non-chromophores (phenylbenzoate) that only the chromophores are reoriented by light as far as the glassy state is concerned. Individual chromophores are thus addressed by photoselection. Photoselection in the fluid nematic state, on the other hand, leads also to a reorientation of the non-chromophores. 相似文献
10.