全文获取类型
收费全文 | 7580篇 |
免费 | 165篇 |
国内免费 | 6篇 |
专业分类
化学 | 4380篇 |
晶体学 | 26篇 |
力学 | 142篇 |
综合类 | 1篇 |
数学 | 1030篇 |
物理学 | 2172篇 |
出版年
2020年 | 58篇 |
2018年 | 57篇 |
2017年 | 62篇 |
2016年 | 158篇 |
2015年 | 113篇 |
2014年 | 143篇 |
2013年 | 299篇 |
2012年 | 284篇 |
2011年 | 320篇 |
2010年 | 168篇 |
2009年 | 142篇 |
2008年 | 269篇 |
2007年 | 278篇 |
2006年 | 226篇 |
2005年 | 236篇 |
2004年 | 174篇 |
2003年 | 171篇 |
2002年 | 128篇 |
2001年 | 115篇 |
2000年 | 101篇 |
1999年 | 94篇 |
1998年 | 70篇 |
1997年 | 96篇 |
1996年 | 97篇 |
1995年 | 108篇 |
1994年 | 102篇 |
1993年 | 100篇 |
1992年 | 103篇 |
1991年 | 87篇 |
1990年 | 81篇 |
1989年 | 86篇 |
1988年 | 81篇 |
1987年 | 87篇 |
1986年 | 83篇 |
1985年 | 102篇 |
1984年 | 113篇 |
1983年 | 79篇 |
1982年 | 110篇 |
1981年 | 108篇 |
1980年 | 84篇 |
1979年 | 89篇 |
1978年 | 115篇 |
1977年 | 105篇 |
1976年 | 95篇 |
1975年 | 93篇 |
1974年 | 72篇 |
1973年 | 90篇 |
1971年 | 62篇 |
1967年 | 57篇 |
1966年 | 57篇 |
排序方式: 共有7751条查询结果,搜索用时 15 毫秒
11.
12.
T. Schäfer 《The European Physical Journal A - Hadrons and Nuclei》2007,31(4):403-408
We review many-body calculations of the equation of state of dilute neutron matter in the context of effective-field theories
of the nucleon-nucleon interaction. 相似文献
13.
14.
15.
Gunter M. Schütz 《Zeitschrift für Physik B Condensed Matter》1997,104(3):583-590
We study diffusion-limited (on-site) pair annihilation A + A → 0 and (on-site) fusion A + A → A which we show to be equivalent for arbitrary space-dependent diffusion and reaction rates. For one-dimensional lattices with nearest neighbour hopping we find that in the limit of infinite reaction rate the time-dependent n-point density correlations for many-particle initial states are determined by the correlation functions of a dual diffusion-limited annihilation process with at most 2n particles initially. Furthermore, by reformulating general properties of annihilating random walks in one dimension in terms of fermionic anticommutation relations we derive an exact representation for these correlation functions in terms of conditional probabilities for a single particle performing a random walk with dual hopping rates. This allows for the exact and explicit calculation of a wide range of universal and non-universal types of behaviour for the decay of the density and density correlations. 相似文献
16.
17.
The tunneling of single electrons in small capacitance tunnel junctions is influenced by charging effects and by the fluctuations of the elecromagnetic environment. We study the effect of an external circuit with arbitrary impedance on the tunneling of quasiparticles and Cooper pairs in voltage driven Josephson junctions. We present results at finite temperatures and also consider an acdriven system. 相似文献
18.
T. Gleisberg F. Krauss C. G. Papadopoulos A. Schälicke S. Schumann 《The European Physical Journal C - Particles and Fields》2004,34(2):173-180
In this paper total cross sections for signals and backgrounds of top- and Higgs-production channels in e + e- collisions at a future linear collider are presented. All channels considered are characterized by the emergence of six-particle final states. The calculation takes into account the full set of tree-level amplitudes in each process. Two multi-purpose parton level generators, HELAC/PHEGAS and AMEGIC + + , are used, and their results are found to be in perfect agreement.Received: 26 November 2003, Revised: 15 January 2004, Published online: 3 March 2004 相似文献
19.
20.
There are two major alternatives for violating the (usual) Lorentz invariance at large (Planckian) energies or momenta—either not all inertial frames (in the Planck regime) are equivalent (e.g., there is an effectively preferred frame) or the transformations from one frame to another are (nonlinearly) deformed (“doubly special relativity”). We demonstrate that the natural (and reasonable) assumption of an energy-dependent speed of light in the latter method goes along with violations of locality/separability (and even translational invariance) on macroscopic scales. 相似文献