全文获取类型
收费全文 | 96篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
化学 | 40篇 |
力学 | 2篇 |
数学 | 6篇 |
物理学 | 49篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2019年 | 2篇 |
2018年 | 4篇 |
2017年 | 6篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 1篇 |
2013年 | 5篇 |
2012年 | 5篇 |
2011年 | 7篇 |
2010年 | 3篇 |
2009年 | 3篇 |
2008年 | 3篇 |
2007年 | 2篇 |
2006年 | 3篇 |
2005年 | 3篇 |
2003年 | 1篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1978年 | 4篇 |
1977年 | 4篇 |
1976年 | 7篇 |
1975年 | 5篇 |
1971年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有97条查询结果,搜索用时 0 毫秒
61.
Z.H. Tagiev 《Optics Communications》2006,261(2):258-265
Theoretical consideration of the second harmonic generation in the constant-intensity approximation with account of the inverse effect of the excited wave on a stimulation wave through account of the phase change of interaction waves is presented. The behavior of harmonic wave intensity in a fiber for different parameters of the problem has been studied, the self-action of the light both in glass optical fiber and inside the homogeneous medium has been analyzed. In this approximation a decrease of conversion efficiency and a change of parameters of the curves of synchronism versus the pump intensity, in particular, the change of positions of intensity minima that does not take place in the constant-field approximation, are observed. The propagation of a plane wave packet in the homogeneous medium with quadratic nonlinearity and in an optical fiber accompanied by the self-phase modulation and leading to the change of the Gaussian pulse spectrum is analyzed with account of the phase changes of all the interacting waves. 相似文献
62.
63.
64.
65.
A. A. Buniyat-zade Yu. B. Tagiev L. A. Ismailova Ya. M. Bilalov T. M. Ismailov 《Mechanics of Composite Materials》1976,12(3):485-486
The effect of the molecular weight on the instantaneous dynamic modulus of elasticity of monodisperse specimens of linear polyethylene has been studied. It is shown that above a critical value of the molecular weight the modulus of elasticity is constant and equal to 4·109 N/m2, while below that value it increases to 7.28·109 N/m2.M. Azizbekov Azerbaidzhan Institute of Petroleum and Chemistry, Baku. Translated from Mekhanika Polimerov, No. 3, pp. 531–533, May–June, 1976. 相似文献
66.
67.
68.
G.K. Aslanov G.M. Niftiev O.B. Tagiev CH.M. Briskina V.F. Zolin V.M. Markushev 《Journal of luminescence》1985,33(2):135-140
Photoluminescence of chalcogenides of europium-gallium, EuGa2S4 and EuGa2Se4, doped with neodymium is investigated. The positions of Stark levels are determined from the spectra. The symmetry of luminescence centres is shown to be lower than cubic and the existence of nonequivalent centers is established. At 77 K the decay time of luminescence from the excited levels of Nd3+ depends on the spin of the states. That indicates a slow relaxation rate in the crystals under investigation. It is probable that these crystals can be used as effective luminophores. 相似文献
69.
70.
The paper deals with the results of investigations of the photoelectric properties of GaSexTe1?x : Sn single crystals in a strong electric field.The maximum influence of light on the current-voltage characteristics is observed to beat wavelength between 400 and 800 nm.The sensitivity of the phototrigger effect is about 107 in these crystals. 相似文献