排序方式: 共有31条查询结果,搜索用时 171 毫秒
21.
22.
23.
A Cu-Sn-Pb alloy modelled after an antique was cast and the powder-corrosion (P-C) was prepared on it under simulated natural conditions. The main components of the corrosion are much like those of the ancient bronze powder corrosion. It is found that chloride, water and oxygen are the essential factors for P-C formation of which chlorine plays the most important role. According to the results of expriments and thermodynamic calculations, the chemical mechanism of the copper desease was studied. It is pointed out that the fast spread of P-C is caused by two vicious circles. 相似文献
24.
25.
近年来,国际上在计算机辅助有机合成设计的理论与实践方面日臻完善,对此,国内也已有文章介绍在本文中,作者将根据自己研制计算机辅助合成设计系统的实践,从基本原理和技术路线的角度来介绍这项研究工作的细节,期望能够抛砖引玉,使更多化学界同行了解计算机辅助化学设计的前景与进展,并加入研究的行列。 相似文献
26.
27.
28.
小波分析与因子分析对吸收光谱去噪性能比较的初步观察 总被引:5,自引:2,他引:3
本文就因子分析和小波分析对吸收光谱的去噪能力进行了比较,并考察了此两种技术的不同联合方式的去噪功能,获得了一些初步的结果。 相似文献
29.
Systematic studies are made on application of chemometrics to chemical modeling and/or molecular modeling as well as the regularity of retention index for gas chromatography (GC). A set of novel molecular graph theoretical parameters, called the molecular distance-edge (MDE) vector (λ), is proposed and found to be excellently correlated to retention index of GC for alkanes. The MDE parameters were tested by the multiple linear regression (MLR) estimation and prediction of the retention index of GC, and the results obtained are satisfactory. 相似文献
30.