摘要
针对比色法测试二氧化硫浓度的问题,研究探讨试纸照片颜色读数,即红、绿、蓝三原色(RGB)的颜色值以及色调(H)、饱和度(S)的值,以及其与二氧化硫浓度之间的关系。利用多元非线性回归分析的方法,借助MATLAB编程模拟,建立了二氧化硫浓度关于试纸照片颜色读数的多元逐步回归数学模型。通过分析回归模型的统计检验量R2、F、p和σ2等取值的变化规律,并定义多元函数自变量的贡献率指标描述自变量在模型中的重要程度,利用剔除法,讨论了样本数量、重复独立实验次数、颜色维度等因素对模型的影响。
In consideration of the sulfur dioxide concentration measured in the colorimetric method,the author will study on and discuss the test paper photos,color and reading,namely,the three-primary color(RGB)value of red,green and blue,hue(H),degress of saturation(S)and the relationship with sulfur dioxide concentration,then,take advantage of MATLAB programming simulation to build the multiple stepwise regression mathematical model about test paper color and reading in the multiple nonlinear regression analysis method,after that,analyze the dereferencing change rules of statistical test quantity,R 2、F、p and others of regression modelσ2,define the contribution rate index of multivariate function variables,describe the importance degree of variables in model,as well as discuss the sample quantity,number of repeated and independent experiment,color dimension and other factors′influence on model in the excluding method.
作者
刘楠
刘迪
Liu Nan;Liu Di(Shaanxi Polytechnic Institute,Xianyang 712000,China)
出处
《甘肃科学学报》
2018年第2期40-44,共5页
Journal of Gansu Sciences
基金
陕西省科技厅基金项目(2015GY165)
陕西工业职业技术学院基金项目(14KCGG-090)
关键词
数码比色法
二氧化硫浓度
非线性逐步回归
MATLAB
Digital colorimetric method
Sulfur dioxide concentration
Nonlinear stepwise regression
MATLAB
