摘要
采用非线性最小二乘回归方法拟合3He饱和区气液密度实验数据 ,提出精度满足要求的3He气液饱和密度方程。该方程在实验点上的平均相对偏差为 0 79% ,最大相对误差为 7 4 6 % ,相对误差超过 2 5 %的数据点有 6个。该方程不仅可以用来计算饱和区气液密度 ,而且对将来产生3He气态和液态区的状态方程具有重要意义 ,为物性计算提供可靠的初值。
An accurate density equation for saturated 3He is obtained by using nonlinear regression for collected experimental data. The average relative error of this equation is 0.79%, while the maximum relative error is 7.46%. There are only 6 points out of above 2.5% with the relative error.This equation not only can be used to calculate saturated density of 3He, but is also of great significance to generate the equation of state for 3He in both liquid and gas regions.
出处
《低温工程》
CAS
CSCD
北大核心
2004年第3期13-16,共4页
Cryogenics
基金
国家自然科学基金 (5 0 376 0 5 5 )
教育部高校博士点专项基金 (2 0 0 10 335 0 10 )资助项目
