全文获取类型
收费全文 | 45篇 |
免费 | 0篇 |
专业分类
化学 | 7篇 |
晶体学 | 1篇 |
物理学 | 37篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2020年 | 2篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 1篇 |
2009年 | 1篇 |
2008年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1974年 | 4篇 |
1973年 | 2篇 |
1972年 | 1篇 |
1971年 | 6篇 |
1970年 | 2篇 |
1968年 | 1篇 |
1967年 | 2篇 |
1966年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有45条查询结果,搜索用时 6 毫秒
1.
Effect of experimental conditions on the possibility of formation of multidimensional images of motor fuels and liquid mineral technical oils used for the classification and identification of these samples by the method of pattern recognition is studied. Transmission spectra are considered as primary images of the studied samples. Multidimensional statistical analysis of the results of spectroscopic measurements is performed by principal component analysis. A noticeable increase in the separation of spectroscopic images on the statistical plane in the optimization of the spectral range of the primary image and the thickness of the absorbing layer is shown. 相似文献
2.
3.
4.
5.
Crystallography Reports - The effect of ultrasound on convective flow in the melt at pulling of Ga0.03In0.97Sb single crystals has been modeled by the light cut method in an ebonite crucible using... 相似文献
6.
7.
8.
9.
Egorova N. I. Konyushenko I. O. Nemets V. M. Peganov S. A. 《Optics and Spectroscopy》2020,128(4):553-561
Optics and Spectroscopy - The features and possibilities of absorption molecular spectroscopy of complex mixtures of organic compounds have been studied by the example of fractions of thermal... 相似文献
10.
The events which initiated the organization of the Laboratory of Spectrochemical Analysis and the Division of Optics of the Department of Physics of Leningrad State University in 1948 are set forth. The steps in the growth of the laboratory and the transformations in the main fields of scientific research are considered. The important role of the laboratory staff at all steps of its work is noted both in the development of methods of spectrochemical analysis and their application as well as in training students and highly skilled personnel in analytical spectroscopy. The researchers of the laboratory who made a great contribution to analytical spectroscopy are listed. 相似文献