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遗传决定系数(coefficient of genetic determination)
遗传决定系数(coefficient of genetic determination)
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遗传决定系数(coefficient of genetic determination)
A.决定系数的取值范围是0≤r2≤1
B.决定系数r2可以用来度量直线回归方程的拟合度
C.决定系数r2可以用来度量直线回归方程预测的可靠程度
D.决定系数r2不能反应相关变量间相关的性质
The most general approach to visibility is
dE=-Ebextdx (2.5)
where E is the light intensity of a collimated beam of light, bextis the extinction coefficient, which is the sum of the four separate b values for light scattering and absorption by gas molecules and by particles, and x is the distance [28]. If the air mass through which one views a distant object is uniform, so that bext is constant, this may be integrated to
(2.6)
The Koschmeider equation [Eq.(2.4)]is based on the visual range corresponding to E/E0=0.02 when LV=Δx.