【摘要】 根据激光诱导击穿光谱(LIBS)展宽主要为非线性Lorentz函数模型,利用Levenberg-Marquardt(L-M)算法对该理论模型中的待定参数进行优化估值,扣除了光谱信号中的连续背景,校正和还原了峰位和峰强,并对拟合数据点自动提取方法进行了分析;以MatrixVB与VB混合编程相结合,实现了基于L-M算法的LIBS光谱数据自动拟合与特征参数提取,与手动操作的常用数据分析软件Origin7.5的拟合结果进行了比较,验证了该方法的稳定性与可靠性。更多还原

【Abstract】 According to that the spectral line broadening of laser induced breakdown spectroscopy(LIBS)was lorentz nonlinearfunction model,using Levenberg-Marquardt(L-M)agorithm to optimally estimate the undetermined parameter in the function,the continuum background radiation and peak position and peak intensity were corrected,and the method of data points automaticextraction for fitting was analysed.Automatic fitting and feature parameter extraction for spectral data of LIBS based on L-M al-gorithm that was hybrid programming with matrixVB and VB were accomplished,and the result was compared with the origin7.5data analysis software which was manual and commonly used and verified its stability and reliability.更多还原