红外光谱计算分析鉴别海面溢油源的研究

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。

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

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.