摘要
通过动态线性小振幅剪切震荡实验所得的熔体储能模量G′(ω)和耗能模量G″(ω)数据,采用最小二乘法线性回归、正则法和非线性回归法分别计算得到离散松弛时间谱,比较三种方法得到结果的差别,讨论计算参数和温度对离散松弛时间谱的影响。
By using dynamic rheometer-ARES, linear viscolelasticity of melts is characterized by small amplitude oscillatory shear test. From data of storage moduli and loss moduli, discrete relaxation spectra are obtain by means of linear regression method, regularization method and nonlinear regression method. Effects of the calculation methods, computing parameters, temperature and materials on the spectrum are discussed.
出处
《河南科学》
2004年第5期626-628,共3页
Henan Science
关键词
松弛时间谱
最小二乘法
线性回归
正则法
非线性回归法
discrete relaxation spectrum
least square method
linear regression
regularization, nonlinear regression
