红外光谱计算分析鉴别海面溢油源的研究

Study on Identifing the Source of Spilled Oil on the Sea by Infrared Spectrometric Calculus Analysis

本法将数字化的溢油和可疑溢油源样品的红外光谱视为N—维空间的两个矢量,它们间的角距离即作为定量比较两油品相似程度的依据。计算时选用表征油品组成特征的四个关键谱带:1600、1375、810和720cm^(-1)作为分析谱带。为了降低实验误差和风化影响,附加了一种新的数学处理过程,研究规划出N行M列(N>M)的线性矛盾方程组,用最小二乘解法处理原始数据求得问题的最可信赖解,从而用计算分析取得令人满意结果,并在现场执法服务中得到证实。

In this method digitized IR spectra of the spilled oil and sample from possible source are considered as two vectors in n-dimensional space, and their angular distance in nspace as a quantitative criterion of the identity between the two samples. Four bands characteristic of oil samples-1600, 1375, 810 and 720cm-1, are chosen for comparison. In order to reduce the experimental error and the effect of weathering, a new mathematical trearment is added and contradictory linear equations of N-line and M-row(N>M)are thus derived. The least-square method is used to obtain the most reliable solution. The method is satisfcatory in field-work of enforce the law.