Title: Finger pattern????????? ??wavelet????????? ???
1Finger pattern???????????wavelet????????????
- ?? ? ??? ?? ? ??
- ????? ???????? ???????
2Outline
- ????????
- Wavelet????????
- Finger pattern?????? ???
- ???? ??
- ??? ?????
3????????
4????????
- ???????????????????
- ??????Krylov??????????????.
- ?????, ????????????????????.
- M ???.
5????????
- ??????.
- ????.
?????
????????
M ?????????. ? A-1?????????.
????????????
??????????
?? ?
?? ?
?
?
? ?
? ?
?? ? ??
?? ?? ?
6Wavelet????????
7Wavelet???????? ??wavelet??(DWT)
L ???????
W?????
8Wavelet????????
??
9Wavelet????????
????????
??wavelet????????
10Wavelet???????? wavelet???
Times
Sherman 4 (n1104)
0.4
- Daubechies 4
- ?????
- ?????
- ????????
- Haar
- ?????
- ?????
- ????????
????
85
87
Daubechies4
Haar
11Finger pattern??????
12Finger pattern?????? ???????
????????
??? ??????????? ????????, ??? ????????,
QR?? ???n ????????.
??????
QR?????????????, Finger pattern???????????.
?????, ????????????????.
13Finger pattern??????
???
???
A(,Sj) mj(Sj)
A(,Sj) mj(Sj)
14Finger pattern?????? ????
?????
Theorem 1.
Proof.
??? ???
15??????
16????
Test??
- Poisson3Da (electromagnetics problem)
- dw8192 (computational fluid dynamics problem)
n 13514, Nnz 352726 n 8192, Nnz 41746
T
b (1,,1)
???
- ??wavelet???????????
- ???
- ILU(0)
??
T
x (0,,0) r /r lt 10
0
-8
0
n
????
- CPU PowerPC G5 2.5GHz
- ??? 4.0GB
- ??? Fortran77
- ????? g77 O5
17??
poisson3Da
????
12
158 158
159 159
160 160
57
Times
L
3
4
5
??? ???
??? ???
??? ???
ILU(0)
18??
dw8192
? ? ? ?
? ????? ? ??? L8 ? ??? L6 ? ??? L7 ? ??? L8 ?
ILU(0)
????
500
0
19??
dw8192
25
Times
484
230
449
316
????
0
L
6
8
7
??? ILU(0)
20????????
21??? ?????
- ??wavelet????????????, finger pattern ??????????.
- ????????QR????????????? ???, ????1.5???????.
- ??, ???????????????????? ????????.
- ?????????????????????.
- ?????
- ???????????????
- ??????????????