【摘要】 利用逐步非线性回归,将石油馏分液体密度回归成数学关联式;关联式与查图结果误差一般不超过2%;关联式可用计算机进行计算;该方法还可用于难于找到准确方程有关图表的回归。更多还原

【Abstract】 The liquid density of petroleum fractions were regressed into mathematic correlation equation by stepwise nonlinear regression.The error of the result of correlation equation was no greater than 2% com-pared with that from nomographs.The correlation equation could be run in computer.This method could also be used for the regression of nomographs whose accurate equations could not be easily found.更多还原