全文获取类型
收费全文 | 707篇 |
免费 | 5篇 |
国内免费 | 2篇 |
专业分类
化学 | 360篇 |
晶体学 | 7篇 |
力学 | 7篇 |
数学 | 57篇 |
物理学 | 283篇 |
出版年
2020年 | 10篇 |
2016年 | 4篇 |
2015年 | 6篇 |
2014年 | 3篇 |
2013年 | 15篇 |
2012年 | 15篇 |
2011年 | 37篇 |
2010年 | 18篇 |
2009年 | 17篇 |
2008年 | 28篇 |
2007年 | 38篇 |
2006年 | 28篇 |
2005年 | 18篇 |
2004年 | 28篇 |
2003年 | 17篇 |
2002年 | 23篇 |
2001年 | 24篇 |
2000年 | 28篇 |
1999年 | 23篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 17篇 |
1995年 | 15篇 |
1994年 | 24篇 |
1993年 | 24篇 |
1992年 | 17篇 |
1991年 | 9篇 |
1990年 | 10篇 |
1989年 | 6篇 |
1988年 | 10篇 |
1987年 | 9篇 |
1986年 | 11篇 |
1985年 | 11篇 |
1984年 | 7篇 |
1982年 | 4篇 |
1981年 | 11篇 |
1980年 | 4篇 |
1979年 | 11篇 |
1978年 | 10篇 |
1977年 | 7篇 |
1976年 | 5篇 |
1975年 | 3篇 |
1974年 | 10篇 |
1973年 | 13篇 |
1972年 | 7篇 |
1971年 | 6篇 |
1970年 | 6篇 |
1968年 | 6篇 |
1967年 | 5篇 |
1966年 | 4篇 |
排序方式: 共有714条查询结果,搜索用时 15 毫秒
91.
R. Schreiber 《Fresenius' Journal of Analytical Chemistry》1900,39(7):457
Ohne Zusammenfassung 相似文献
92.
93.
Nakhjavan B Tahir MN Panthöfer M Gao H Gasi T Ksenofontov V Branscheid R Weber S Kolb U Schreiber LM Tremel W 《Chemical communications (Cambridge, England)》2011,47(31):8898-8900
A wet chemical approach from organometallic reactants allowed the targeted synthesis of Co@Fe(2)O(3) heterodimer and CoFe(2)O(4) ferrite nanoparticles. They display magnetic properties that are useful for magnetic MRI detection. 相似文献
94.
M.A. Bouchene V. Blanchet C. Nicole N. Melikechi B. Girard H. Ruppe S. Rutz E. Schreiber L. Wöste 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》1998,2(2):131-141
The interaction of a sequence of two identical ultrashort laser pulses with an atomic system results in quantum interferences
as in Ramsey fringes experiments. These interferences allow achievement of temporal coherent control of the excitation probability.
We present the results of a temporal coherent control experiment on two different atomic systems: one-photon absorption in
K (4s-4p) and two-photon absorption in Cs (6s-7d). In K, the quantum interferences between the two excitation paths associated with the laser pulses are revealed through
rapid oscillations of the excitation probability as a function of the time delay between the two pulses. These oscillations
take place at the transition frequency (period T = 2.56 fs). The interferences are modulated by beats (at about 580 fs) resulting from the doublet structure of the excited
state (4p (2
P
1/2
, 2
P
3/2
)). Three complementary interpretations of this experiment are presented: in terms of beats of quantum interferences, of variation
in the spectrum intensity, and of wave packet interferences. Whenever the two laser pulses are temporally overlapped, optical
interferences are superimposed on to the quantum interferences. The distinction between these two types of interference is
clearly revealed in the two-photon excitation scheme performed on Cs (6s-7d (2
D
3/2
, 2
D
5/2
)) because quantum interferences occur at twice the frequency of the optical interferences.
Received: 30 December 1997 / Revised: 28 February 1998 / Accepted: 4 March 1998 相似文献
95.
96.
Peter Schreiber 《Mathematical Logic Quarterly》1993,39(1):131-132
The uniqueness of the parallel lines is independent from the analogous statement on parallel planes and the usual further axioms of three-dimensional affine geometry. MSC: 51A15, 03F65. 相似文献
97.
98.
K. U. Schreiber J. -P. R. Wells G. E. Stedman 《General Relativity and Gravitation》2008,40(5):935-943
Large ring lasers with a cavity Q well above 1012 are characterized by extremely narrow line-widths and high coherence. At this point, active Sagnac interferometers do not
quite reach the quantum limit. In this paper, we will explore the current status of this technology and look at the various
noise processes involved with large ring lasers rigidly mounted to the Earth crust. 相似文献
99.
For locally compact groups G and H, let BM(G, H) denote the Banach space of bounded bilinear forms on C0(G) × C0(H). Using a consequence of the fundamental inequality of A. Grothendieck. a multiplication and an adjoint operation are introduced on BM(G, H) which generalize the convolution structure of M(G × H) and which make BM(G, H) into a KG2-Banach -algebra, where KG is Grothendieck's universal constant. Various topics relating to the ideal structure of BM(G, H) and the lifting of unitary representations of G × H to -representations of BM(G, H) are investigated. 相似文献
100.