湘江流域TRMM卫星降水产品降尺度研究与应用
范田亿, 张翔, 黄兵, 钱湛, 姜恒
Downscaling of TRMM precipitation products and its application in Xiangjiang River basin
FAN Tianyi, ZHANG Xiang, HUANG Bing, QIAN Zhan, JIANG Heng
表3
精度评价指标
Tab.3
Accuracy evaluation index
精度评
价指标
公式
①
最优值
R
2
R
2
=
∑
j
=
1
n
(
x
j
-
x
-
)
(
y
j
-
y
-
)
∑
j
=
1
n
(
x
j
-
x
-
)
2
∑
j
=
1
n
(
y
j
-
y
-
)
2
2
1
RMSE
/mm
RMSE
=
∑
j
=
1
n
(
x
j
-
y
j
)
2
n
0
ARE
/%
ARE
=
∑
j
=
1
n
x
j
-
y
-
n
×
y
-
0