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«“√ “√«‘∑¬“»“ µ√å ¡¢. ªï∑’Ë 39 ©∫—∫∑’Ë 1 155<br />

h( x, y)<br />

<br />

<br />

(x X )<br />

<br />

<br />

y-Y <br />

x X,Y <br />

1<br />

h( x, y)<br />

<br />

<br />

(y Y ) <br />

<br />

y<br />

X,Y <br />

(22), (23) c,d<br />

Y <br />

<br />

x-Xy+Y<br />

<br />

<br />

x X min <br />

<br />

(Y ) 2 <br />

<br />

<br />

(x X)<br />

2<br />

<br />

(y<br />

1<br />

Y)<br />

2 <br />

<br />

(X X min ) 2 <br />

<br />

<br />

<br />

Y <br />

<br />

2 (x X)(y-Y)+(y-Y<br />

) 2<br />

<br />

<br />

<br />

<br />

(X X min ) <br />

<br />

(23)<br />

E( y-Y) 2 <br />

1<br />

<br />

(Y ) 2 <br />

<br />

<br />

V(x) <br />

<br />

<br />

(X X min) 2 <br />

<br />

<br />

<br />

Y <br />

<br />

2 <br />

Cov(x,y) V(y)<br />

<br />

<br />

<br />

(X X min ) <br />

<br />

<br />

R Y<br />

1 <br />

X X , Syx<br />

s xS y <br />

min<br />

1 f<br />

MSE(y<br />

1<br />

) R 2 S 2<br />

x 2R xSy S 2 1 1 S y <br />

n<br />

(24)<br />

1 f<br />

MSE(y<br />

i<br />

) R 2 2 2R SxSy S 2 i S x i y ;<br />

i 1,2<br />

n<br />

(25)<br />

<br />

YX R min<br />

2<br />

XXmin<br />

X<br />

2. <br />

MSE <br />

2.1 y<br />

i<br />

y<br />

R<br />

MSE(y<br />

i) MSE(y<br />

R)<br />

(R 2 2<br />

i R 2 )Sx 2(R i R) SxSy 0 , i 1, 2 (26)<br />

(24) yi<br />

y<br />

R

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