200503.65 001
. -32
_______ ..
__________2011
R(x) . min R(x) :
i+1=Xi h* gradR(x)j,
i+1j=Xij h* dR/dXj, j=1,2n
h* gradR(x) , , h, .
:
1. R(x) R(x) Xj
2. .
h .
, .
i+1j=Xij h* cos(Wj), cos(Wj)=dR/dXj/| gradR(x)j|
h. , h.
1. hj = const = h
2. hj = hj-1/2, R(xi) > R(xi-1)
hj-1, R(xi) < R(xi-1);
3. hj= hj-1*2, <a1
hj, 1<=a<=a2
hj/3, >a2
, 1 a2 . , , ( ), h .
:
dR/dXj = [(X1,.., Xi, + gi,..,Xn) R(X1,.., Xi,..,Xn)]/ gi
dR/dXj = [(X1,.., Xi, + gi,..,Xn) R(X1,.., Xi,..,Xn)]/ gi*2
, , , .
R(x), .. /| gradR(x)|<e.
R(x). , .
grad R(x), min R(x). , grad R(x).
, , .
|
|
. min R(x) .
- | gradR(x)| < e.
. , . . .