摘要
地质和天文变量中常常存在参数可变的振荡衰减型自相关函数。本文提出一套分周期的初值确定方法以对该类自相关函数进行非线性拟合。作者以实例说明分周期的拟合精度是不分周期拟合精度的17～28倍,并且分周期拟合具有较好的拟合效果。
Variations of geology and astronomy have constantly parameter variable auto-correlation function of vibration attenuation type. This paper puts forward a suit of initial value determinate method of separated periodic to go on nonlinear fitting for this type of autocorrelation function. An actual example is taken to illustrate that fitting precision of separated period is 17~28 times larger than non-separated period and the fitting of separated period has good effect.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1990年第2期189-195,共7页
Earth Science-Journal of China University of Geosciences
关键词
振荡衰减型
自相关函数
拟合
autocorrelation function of vibration attenuation type, differential equation, geologic process, sunspot.
