全文获取类型
收费全文 | 28682篇 |
免费 | 1738篇 |
国内免费 | 859篇 |
专业分类
化学 | 6983篇 |
晶体学 | 332篇 |
力学 | 1749篇 |
综合类 | 216篇 |
数学 | 11046篇 |
物理学 | 10953篇 |
出版年
2023年 | 164篇 |
2022年 | 314篇 |
2021年 | 299篇 |
2020年 | 321篇 |
2019年 | 618篇 |
2018年 | 462篇 |
2017年 | 482篇 |
2016年 | 406篇 |
2015年 | 344篇 |
2014年 | 514篇 |
2013年 | 1410篇 |
2012年 | 793篇 |
2011年 | 1305篇 |
2010年 | 778篇 |
2009年 | 1147篇 |
2008年 | 1296篇 |
2007年 | 1311篇 |
2006年 | 1231篇 |
2005年 | 909篇 |
2004年 | 1264篇 |
2003年 | 1427篇 |
2002年 | 1962篇 |
2001年 | 1948篇 |
2000年 | 1775篇 |
1999年 | 1951篇 |
1998年 | 1659篇 |
1997年 | 1053篇 |
1996年 | 557篇 |
1995年 | 324篇 |
1994年 | 280篇 |
1993年 | 131篇 |
1992年 | 152篇 |
1991年 | 114篇 |
1990年 | 193篇 |
1989年 | 166篇 |
1988年 | 123篇 |
1987年 | 94篇 |
1986年 | 136篇 |
1985年 | 209篇 |
1984年 | 189篇 |
1983年 | 87篇 |
1982年 | 145篇 |
1981年 | 241篇 |
1980年 | 238篇 |
1979年 | 115篇 |
1978年 | 175篇 |
1977年 | 105篇 |
1976年 | 77篇 |
1975年 | 82篇 |
1974年 | 78篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Genkai Zhang 《manuscripta mathematica》1998,97(3):371-388
Let X=G
* be a compact Hermitian symmetric space. We study the Berezin transform on L
2(X) and calculate its spectrum under the decomposition of L
2(X) into the irreducible representations of G
*. As applications we find the expansion of powers of the canonical polynomial (Bergman reproducing kernel for the canonical
line bundle) in terms of the spherical polynomials on X, and we find the irreducible decomposition of tensor products of Bergman spaces on X.
Received: 10 September 1996 / Revised version: 10 September 1997 相似文献
102.
103.
L.-Q. Han S.-Y. Zhao Y.-D. Zhou P.-L. Zhang 《Applied physics. B, Lasers and optics》1997,65(3):399-402
Received: 18 June 1996/Revised version: 3 January 1997 相似文献
104.
A free-piston driver that employs entropy-raising shock processes with diaphragm rupture has been constructed, which promises
significant theoretical advantages over isentropic compression. Results from a range of conditions with helium and argon driver
gases are reported. Significant performance gains were achieved in some test cases. Heat losses are shown to have a strong
effect on driver processes. Measurements compare well with predictions from a quasi-one-dimensional numerical code.
Received 7 September 1996 / Accepted 5 October 1996 相似文献
105.
106.
A. Sánchez-Lavega A. Salazar A. Ocariz L. Pottier E. Gomez L.M. Villar E. Macho 《Applied Physics A: Materials Science & Processing》1997,65(1):15-22
Received: 16 September 1996/Accepted: 6 January 1997 相似文献
107.
108.
An assignment of the near-infrared bands in the 600–800 nm spectral region observed in magnetic circular dichroism (MCD)
spectra of high-spin ferrous haemoproteins is presented. The assignment is based on a relative energy level scheme for iron
d-electrons, a comparison of predicted and measured temperature dependences of MCD intensity, a sign of MCD bands and a group
theoretical analysis of allowed transitions. The proposed assignment is consistent with the ∼15-nm red shift of the ∼760 nm
band on breakage of the Fe-His bond in deoxy-myoglobin at low pH, with low-temperature photolysis experiments available for
CO complexes of several haemoproteins. In accordance with the observations, the intensity of the MCD bands for proteins with
a sulphur anion of cysteine as proximal haemligand (cytochrome P450 and chloroperoxidase) is predicted to be diminished by
at least one order of magnitude compared to that for proteins with an imidazole of a histidine as a protein-derived haemligand
(i.e. myoglobin, haemoglobin and horseradish peroxidase).
Received: 4 February 1997 / Accepted: 1 May 1997 相似文献
109.
Summary. We present a simple proof, based on modified logarithmic Sobolev inequalities, of Talagrand’s concentration inequality for
the exponential distribution. We actually observe that every measure satisfying a Poincaré inequality shares the same concentration
phenomenon. We also discuss exponential integrability under Poincaré inequalities and its consequence to sharp diameter upper
bounds on spectral gaps.
Received: 10 June 1996 / In revised form: 9 August 1996 相似文献
110.
Kevin Houston 《Inventiones Mathematicae》2002,147(3):471-485
The disentanglement of certain augmentations is shown to be the topological join of a disentanglement and a Milnor fibre.
The kth disentanglement of a finite map is defined and for corank 1 maps from ℂ
n
to ℂ
n
+1 it is shown that they are homotopically equivalent to a wedge of spheres. Applications to the Mond conjecture are given.
Oblatum 24-VII-2000 & 5-VII-2001?Published online: 12 October 2001 相似文献