全文获取类型
收费全文 | 237篇 |
免费 | 4篇 |
专业分类
化学 | 111篇 |
力学 | 1篇 |
数学 | 34篇 |
物理学 | 95篇 |
出版年
2021年 | 2篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2014年 | 2篇 |
2013年 | 10篇 |
2012年 | 5篇 |
2011年 | 11篇 |
2010年 | 7篇 |
2009年 | 6篇 |
2008年 | 13篇 |
2007年 | 13篇 |
2006年 | 11篇 |
2005年 | 10篇 |
2004年 | 12篇 |
2003年 | 8篇 |
2002年 | 8篇 |
2001年 | 7篇 |
2000年 | 6篇 |
1999年 | 6篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1989年 | 2篇 |
1983年 | 2篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1976年 | 7篇 |
1975年 | 2篇 |
1974年 | 7篇 |
1973年 | 6篇 |
1971年 | 2篇 |
1940年 | 3篇 |
1928年 | 2篇 |
1927年 | 1篇 |
1925年 | 1篇 |
1919年 | 2篇 |
1914年 | 2篇 |
1910年 | 4篇 |
1909年 | 1篇 |
1906年 | 1篇 |
1905年 | 1篇 |
1903年 | 1篇 |
1900年 | 1篇 |
1884年 | 1篇 |
1868年 | 1篇 |
排序方式: 共有241条查询结果,搜索用时 31 毫秒
11.
Moshammer R Ullrich J Feuerstein B Fischer D Dorn A Schröter CD Crespo Lopez-Urrutia JR Hoehr C Rottke H Trump C Wittmann M Korn G Sandner W 《Physical review letters》2003,91(11):113002
Electron emission for single ionization of Ne by 25 fs, 1.0 PW/cm(2) laser pulses at 800 nm has been investigated in a kinematically complete experiment using a "reaction microscope." Mapping the complete final state momentum space with high resolution, a distinct local minimum is observed at P(e parallel )=0, where P(e parallel ) is the electron momentum parallel to the laser polarization. Whereas tunneling theory predicts a maximum at zero momentum, our findings are in good agreement with recent semiclassical predictions which were interpreted to be due to "recollision." 相似文献
12.
We report the temporal characteristics of laser radiation transmitted through impulsively excited SF6 and exhibiting sideband Raman lines. Even without special dispersion control we observed a sequence of compressed fs pulses following with the period of the excited A(1g) vibrational mode of SF6. The use of both negative and positive group velocity dispersion compensation for the temporal compression was found to be as appropriately efficient. The results prove our new concept of the ultrafast molecular phase modulator. 相似文献
13.
Ralf Korn 《Computational Management Science》2008,5(4):289-304
We survey some recent developments in the area of continuous-time portfolio optimization. These will include the use of options
and of defaultable assets as investment classes and the presentation of a worst-case investment approach that takes the possibility
of stock market crashes into account.
相似文献
14.
15.
Triacetone-triperoxide is a high explosive mainly used by terrorist groups. With the spreading of the recipe on the Internet, increasing number of bomb attacks are being reported worldwide using triacetone-triperoxide. A simple identification method is described using 100 μm polydimethyl siloxane fibre solid phase microextraction and gas chromatography combined with spectrometry. The method was tested on various pre- and post-explosion models that can be collected in a house search or after a bomb attack. Sample preservation and stability was also examined. Identification of triacetone-triperoxide residues in post-explosion models was feasible 24 h after ignition, the detection limit being 5 ng. 相似文献
16.
Ohne Zusammenfassung 相似文献
17.
18.
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, No. 5, pp. 144–150, September–October, 1993. 相似文献
19.
20.
Ralf Korn 《Applied Mathematical Finance》2013,20(1):65-79
We consider the problem of L 2-hedging of contingent claims in diffusion type models for securities markets. In contrast to a recent paper of Schweizer (1994) we insist on a non-negative wealth process corresponding to the optimal hedge portfolio. For this reason the usual projection methods cannot be applied. We give some applications of L 2-hedging in this setting including hedging under constraints, a problem of approximating the wealth process of a richer investor and a mean-variance version of it. 相似文献