全文获取类型
收费全文 | 157篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
化学 | 92篇 |
晶体学 | 12篇 |
力学 | 1篇 |
数学 | 18篇 |
物理学 | 37篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 3篇 |
2014年 | 1篇 |
2012年 | 3篇 |
2011年 | 10篇 |
2010年 | 7篇 |
2009年 | 5篇 |
2008年 | 16篇 |
2007年 | 18篇 |
2006年 | 8篇 |
2005年 | 5篇 |
2004年 | 10篇 |
2003年 | 6篇 |
2002年 | 2篇 |
2001年 | 4篇 |
2000年 | 6篇 |
1999年 | 3篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 3篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 8篇 |
1983年 | 4篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1978年 | 4篇 |
1976年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有160条查询结果,搜索用时 17 毫秒
11.
We introduce a method for finding the required control parameters for a quantum computer that yields the desired quantum algorithm without invoking elementary gates. We concentrate on the Josephson charge-qubit model, but the scenario is readily extended to other physical realizations. Our strategy is to numerically find any desired double- or triple-qubit gate. The motivation is the need to significantly accelerate quantum algorithms in order to fight decoherence. 相似文献
12.
13.
Gerard A. van Albada Maarten G. van der Horst Simon J. Teat Patrick Gamez Olivier Roubeau Ilpo Mutikainen Urho Turpeinen Jan Reedijk 《Polyhedron》2009
In this study the synthesis, crystal structure and characterization of three new transition metal polynuclear compounds with formula [Cu(dipm)(μ-dca)2]n(H2O) (1), [Ni(dipm)(μ-dca)2]n(C2H6O)1/2 (2) and [Cd(dipm)(μ-dca)2]n (3) (in which dipm = bis(pyrimidin-2-yl)amine and dca = dicyanamide) are reported. The isostructural compounds 1 and 2 contain a double-bridging end-to-end dca unit connecting two metal ions and a single bridging end-to-end dca unit between subsequent metals. Compound 3 exhibits only single bridging end-to-end dca units, oriented in three directions, giving rise to a 3D framework. 相似文献
14.
We calculate the asymmetries in parity-nonconserving deuteron photodisintegration due to circularly polarized photons $
\vec \gamma d \to np
$
\vec \gamma d \to np
with the photon laboratory energy ranging from the threshold up to 10MeV and the radiative capture of thermal polarized neutrons
by protons $
\vec np \to \gamma d
$
\vec np \to \gamma d
. We use the leading-order electromagnetic Hamiltonian neglecting the smaller nuclear exchange currents. Comparative calculations
are done by using the Reid93 and Argonne v18 potentials for the strong interaction and the DDH and FCDH “best” values for the weak couplings in a weak one-meson exchange
potential. A weak NΔ transition potential is used to incorporate also the Δ(1232) -isobar excitation in the coupled-channels formalism. 相似文献
15.
We present a multifunction spectrophotometer for the measurement of light reflection from thick and transmission from very thin turbid liquid samples. Moreover, we present a method to get the complex refractive index of such turbid liquids. As an example of the high performance of the device and the method, we present data on inks that are used in offset printing. 相似文献
16.
Crystalline solids, co-existing in equilibrium with the 3-methyl-1H-imidazolium bromohydrogenates(I) ionic liquid, have been characterised by X-ray diffraction analysis. The Br?nsted acidic, homo-conjugate [H(2)Br(3)](-) anions presented are discussed in terms of their structure and reactivity, in efforts to advance the understanding of Br?nsted acidity in ionic liquid media. 相似文献
17.
18.
19.
A. Gersten L. G. Greeniaus J. A. Niskanen S. Ishikawa T. Sasakawa A. W. Thomas 《Few-Body Systems》1988,3(4):171-194
Tests of fundamental symmetries offer the promise of possibly unique insights into the nature of the strong interaction. We review the current status of selected experimental and theoretical investigations of charge symmetry in fewbody systems. 相似文献
20.