全文获取类型
收费全文 | 1237篇 |
免费 | 56篇 |
国内免费 | 3篇 |
专业分类
化学 | 850篇 |
晶体学 | 33篇 |
力学 | 46篇 |
数学 | 128篇 |
物理学 | 239篇 |
出版年
2023年 | 7篇 |
2022年 | 16篇 |
2021年 | 23篇 |
2020年 | 29篇 |
2019年 | 23篇 |
2018年 | 18篇 |
2017年 | 20篇 |
2016年 | 53篇 |
2015年 | 34篇 |
2014年 | 54篇 |
2013年 | 64篇 |
2012年 | 69篇 |
2011年 | 99篇 |
2010年 | 51篇 |
2009年 | 40篇 |
2008年 | 64篇 |
2007年 | 61篇 |
2006年 | 57篇 |
2005年 | 30篇 |
2004年 | 39篇 |
2003年 | 40篇 |
2002年 | 27篇 |
2001年 | 18篇 |
2000年 | 16篇 |
1999年 | 7篇 |
1998年 | 10篇 |
1997年 | 11篇 |
1996年 | 19篇 |
1995年 | 16篇 |
1994年 | 19篇 |
1993年 | 16篇 |
1992年 | 18篇 |
1991年 | 10篇 |
1990年 | 16篇 |
1989年 | 18篇 |
1988年 | 11篇 |
1987年 | 23篇 |
1986年 | 18篇 |
1985年 | 13篇 |
1984年 | 23篇 |
1983年 | 6篇 |
1982年 | 15篇 |
1981年 | 10篇 |
1980年 | 11篇 |
1978年 | 10篇 |
1977年 | 4篇 |
1976年 | 7篇 |
1975年 | 4篇 |
1974年 | 5篇 |
1973年 | 4篇 |
排序方式: 共有1296条查询结果,搜索用时 15 毫秒
81.
82.
Bipin Singh Koranga Mohan Narayan S. Uma Sankar 《International Journal of Theoretical Physics》2011,50(3):760-766
The neutrino parameters determined from the solar neutrino data and the anti-neutrino parameters determined from KamLAND reactor
experiment are in good agreement with each other. However, the best fit points of the two sets differ from each other by about
10−5 eV2 in mass-square difference and by about 2° in the mixing angle. Future solar neutrino and reactor anti-neutrino experiments
are likely to reduce the uncertainties in these measurements. This, in turn, can lead to a signal for CPT violation in terms
a non-zero difference between neutrino and anti-neutrino parameters. In this paper, we propose a CPT violating mass matrix
which can give rise to the above differences in both mass-squared difference and mixing angle and study the constraints imposed
by the data on the parameters of the mass matrix. 相似文献
83.
Khongsit Ansar Rajput Yudhishthir Singh Meena Sunita Sharma Rajan 《Journal of Analytical Chemistry》2022,77(3):295-300
Journal of Analytical Chemistry - Methods for the determination of mercury are described using gold nanoparticles functionalized with nitrogen containing cyclic molecules. Detection methods are... 相似文献
84.
85.
Venkatraman S Anand VG PrabhuRaja V Rath H Sankar J Chandrashekar TK Teng W Senge KR 《Chemical communications (Cambridge, England)》2002,(16):1660-1661
First successful syntheses and structural characterization of new core modified meso aryl azuliporphyrins by a simple [3 + 1] methodology are reported. 相似文献
86.
[reaction: see text]. A facile one-pot synthesis of 1-amino-4-aryl-tetralin derivatives by the CAN-induced cyclodimerization of various styrenes in acetonitrile and acrylonitrile is described. 相似文献
87.
Rahul Pandit Samriddhi Sankar Ray Dhrubaditya Mitra 《The European Physical Journal B - Condensed Matter and Complex Systems》2008,64(3-4):463-469
We give an overview of the progress that has been made in recent years in understanding dynamic multiscaling in homogeneous, isotropic turbulence and related problems. We emphasise the similarity of this problem with the dynamic scaling of time-dependent correlation functions in the vicinity of a critical point in, e.g., a spin system. The universality of dynamic-multiscaling exponents in fluid turbulence is explored by detailed simulations of the GOY shell model for fluid turbulence. 相似文献
88.
89.
Phonon anomalies in two intermediate valence compounds (IVC), SmS and Sm0·75Y0·25S have been investigated using breathing shell model (BSM). The BSM includes breathing motion of electron shells of the rare
earth atom due tof−d hybridization. The phonon dispersion curves of IVC, calculated from the present model, agree well with the measured data.
One-phonon density of states calculated from the present model compares well with the Raman spectra. 相似文献
90.