全文获取类型
收费全文 | 711篇 |
免费 | 23篇 |
国内免费 | 2篇 |
专业分类
化学 | 553篇 |
晶体学 | 9篇 |
力学 | 4篇 |
数学 | 15篇 |
物理学 | 155篇 |
出版年
2020年 | 8篇 |
2019年 | 7篇 |
2018年 | 8篇 |
2017年 | 3篇 |
2016年 | 12篇 |
2015年 | 12篇 |
2014年 | 14篇 |
2013年 | 32篇 |
2012年 | 34篇 |
2011年 | 35篇 |
2010年 | 21篇 |
2009年 | 25篇 |
2008年 | 39篇 |
2007年 | 48篇 |
2006年 | 57篇 |
2005年 | 54篇 |
2004年 | 41篇 |
2003年 | 45篇 |
2002年 | 27篇 |
2001年 | 18篇 |
2000年 | 20篇 |
1999年 | 7篇 |
1998年 | 3篇 |
1997年 | 8篇 |
1996年 | 10篇 |
1994年 | 4篇 |
1992年 | 6篇 |
1991年 | 3篇 |
1990年 | 7篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 6篇 |
1985年 | 6篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1982年 | 6篇 |
1981年 | 7篇 |
1980年 | 6篇 |
1979年 | 9篇 |
1978年 | 5篇 |
1977年 | 8篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1974年 | 6篇 |
1973年 | 6篇 |
1972年 | 6篇 |
1971年 | 3篇 |
1969年 | 3篇 |
1968年 | 3篇 |
排序方式: 共有736条查询结果,搜索用时 0 毫秒
51.
Haino T Araki H Fujiwara Y Tanimoto Y Fukazawa Y 《Chemical communications (Cambridge, England)》2002,(18):2148-2149
A new class of fullerene sensors based on calix[5]arenes has produced the highly sensitive detection of C60 and C70. 相似文献
52.
Haino T Yamanaka Y Araki H Fukazawa Y 《Chemical communications (Cambridge, England)》2002,(5):402-403
The metal-induced regulation of fullerene complexation with double-calix[5]arene is described. The receptor shows strong binding to C70 only in the presence of Cu+. 相似文献
53.
The energy of superfluid turbulence without the normal fluid is studied numerically under the vortex filament model. Time evolution of the Taylor-Green vortex is calculated under the full nonlocal Biot-Savart law. It is shown that for k<2pi/l the energy spectrum is very similar to the Kolmogorov's -5/3 law which is the most important statistical property of the conventional turbulence, where k is the wave number of the Fourier component of the velocity field and l is the average intervortex spacing. The vortex length distribution converges to a scaling property reflecting the self-similarity of the tangle. 相似文献
54.
Kubo K Akemoto M Anderson S Aoki T Araki S Bane KL Blum P Corlett J Dobashi K Emma P Frisch J Fukuda M Guo Z Hasegawa K Hayano H Higo T Higurashi A Honda Y Iimura T Imai T Jobe K Kamada S Karataev P Kashiwagi S Kim E Kobuki T Kotseroglou T Kurihara Y Kuriki M Kuroda R Kuroda S Lee T Luo X McCormick DJ McKee B Mimashi T Minty M Muto T Naito T Naumenko G Nelson J Nguyen MN Oide K Okugi T Omori T Oshima T Pei G Potylitsyn A Qin Q Raubenheimer T Ross M Sakai H Sakai I Schmidt F Slaton T Smith H 《Physical review letters》2002,88(19):194801
Electron beams with the lowest, normalized transverse emittance recorded so far were produced and confirmed in single-bunch-mode operation of the Accelerator Test Facility at KEK. We established a tuning method of the damping ring which achieves a small vertical dispersion and small x-y orbit coupling. The vertical emittance was less than 1% of the horizontal emittance. At the zero-intensity limit, the vertical normalized emittance was less than 2.8 x 10(-8) rad m at beam energy 1.3 GeV. At high intensity, strong effects of intrabeam scattering were observed, which had been expected in view of the extremely high particle density due to the small transverse emittance. 相似文献
55.
56.
57.
58.
Karataev P Araki S Hamatsu R Hayano H Muto T Naumenko G Potylitsyn A Terunuma N Urakawa J 《Physical review letters》2004,93(24):244802
An experiment on the investigation of optical diffraction radiation (ODR) from a slit target as a possible tool for noninvasive electron beam-size diagnostics has been performed at the KEK accelerator test facility. The experimental setup has been installed at the diagnostics section of the extraction line. We have performed the first incoherent ODR observation from a slit target. The measured angular distributions are in reasonable agreement with the theoretical expectation. The beam-size effect onto the ODR angular pattern has been observed. Moreover, the sensitivity to the beam size as small as 14 microm has been achieved. 相似文献
59.
Almost all studies of vortex states in helium II have been concerned with either ordered vortex arrays or disordered vortex tangles. This work numerically studies what happens in the presence of both rotation (which induces order) and thermal counterflow (which induces disorder). We find a new statistically steady state in which the vortex tangle is polarized along the rotational axis. Our results are used to interpret an instability that was discovered experimentally by Swanson et al. [Phys. Rev. Lett. 50, 190 (1983)]] and the vortex state beyond the instability that has been unexplained until now. 相似文献
60.
Q. Hu H. Araki H. Suzuki N. Ishikawa W. Yang T. Noda 《Applied Physics A: Materials Science & Processing》2003,76(4):561-563
A few of the interesting structures made by the assemblage of Si-Ge nanowires fabricated by the floating-zone melting-vapor
method have been observed. They reveal shapes that are similar to coral, jellyfish and sea anemones. The pre-sintered substrate
bar has some large crystalline particles (1–15 μm), which produce sites that are energetically predisposed to nucleation.
The peculiar structures created by the assemblage of Si-Ge nanowires form on favored nucleation sites that consist of numerous
bundles of nanowires with diameters of 20–50 nm. The periodic variation in the diameter of the bundles of nanowires is a common
feature of these structures. In addition, a growth mechanism assisted by the coexistence of Ge and Si-Ge oxides is suggested.
The growth process of these assemblages opens up new possibilities for the study of the growth mechanism of Si-Ge nanowires.
Received: 25 July 2002 / Accepted: 9 September 2002 / Published online: 17 December 2002
RID="*"
ID="*"Corresponding author. Fax: 81-298/59-2736, E-mail: HU.Quanli@nims.go.jp 相似文献