摘要
水温度与水密度之间的函数关系通常由实测经验数据列表给出,也可以绘出函数曲线。通过对数变换、移轴等数学方法,利用最小二乘法回归分析,求出因变量水密度与自变量水温度为拟抛物线型的回归函数表达式,其相关系数几乎达到1.0,为利用重力循环理论供热的管道系统水力计算研究提供了便利条件。
The functional relationship between water temperature and water density is usually given by the list of measured empirical data,and the function curve can also be drawn.Through mathematical methods such as logarithmic transformation and axis shift,the regression function expression of pseudo parabola type between dependent variable water density and independent variable water temperature is obtained by using least square regression analysis,and its correlation coefficient is almost 1.0,which provides convenient conditions for the hydraulic calculation and research of pipeline system heating by using gravity cycle theory.
作者
魏丰君
温志梅
王雅静
郭仁东
翟淋慧
WEI Fengjun;WEN Zhimei;WANG Yajing;GUO Rendong;ZHAI Linhui(School of Energy and Building Engineering,Shandong Huayu University of Technology,Dezhou Shandong 253034,China)
出处
《盐城工学院学报（自然科学版）》
CAS
2021年第3期75-78,共4页
Journal of Yancheng Institute of Technology:Natural Science Edition
基金
2019年德州市市级研发计划项目(201951875)。
关键词
水温度
水密度
最小二乘法
回归函数
water temperature
water density
least square method
regression function
