最小二乘曲线拟合在溶液表面张力实验数据处理中的应用  

Application of least squares curve fitting to processing for experimental data of the aqueous solutions surface tensions

作　　者：吴世彪[1] 徐玲[1] 王亚琴[1] 陈广美[1] 李菲菲[1] 

机构地区：[1]安徽建筑工业学院材料与化工学院,安徽合肥230601

出　　处：《计算机与应用化学》2010年第11期1523-1526,共4页Computers and Applied Chemistry

基　　金：安徽建筑工业学院教研课题资助项目"物理化学实验数据处理系统开发"(2004JX27)

摘　　要：为了优化正丁醇溶液表面张力实验的数据处理方法,本文使用线性和非线性最小二乘曲线拟合方法拟合σ-c关系曲线,并比较了2种拟合方法在溶液表面张力实验数据处理中的应用效果,发现后者能更好地反映正丁醇水溶液表面张力与浓度的函数关系,拟合效果较好,拟合后的计算较简便,计算正丁醇分子截面积结果较准确。继续用后者处理舍弃了2个高浓度数据后的实验数据,拟合效果更好,计算分子截面积结果更准确。在处理正丁醇溶液表面张力实验数据时,应避免使用线性最小二乘曲线拟合方法,应使用非线性最小二乘曲线拟合方法。在正丁醇溶液表面张力实验中,应避免使用高浓度溶液,应使用较低浓度的溶液。The methods of linearnonlinear least squares curve fitting are compared to optimize processing data of n-butanol solution surface tension experiment.The latter method is of better effect on curve fitting,the rest steps of data processing are more convenient and the cross section area of n-butanol molecule is calculated more accurately.The experiment data excluding two records which concentration item is the highest are processed by the later method again.The fitting effect is better,and the result of molecule cross section area is more accurate.It is reasonable that surface tensions experiments are carried out using the solutions which n-butanol concentration is lower.

关 键 词：物理化学实验 表面张力 最小二乘曲线拟合 

分 类 号：TQ015.9[化学工程] TP391.1[自动化与计算机技术—计算机应用技术]