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Finger pattern????????? ??wavelet????????? ???

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Finger pattern wavelet – PowerPoint PPT presentation

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Title: Finger pattern????????? ??wavelet????????? ???


1
Finger pattern???????????wavelet????????????
  • ?? ? ??? ?? ? ??
  • ????? ???????? ???????

2
Outline
  • ????????
  • Wavelet????????
  • Finger pattern?????? ???
  • ???? ??
  • ??? ?????

3
????????
4
????????
  • ???????????????????
  • ??????Krylov??????????????.
  • ?????, ????????????????????.
  • M ???.

5
????????
  • ???????, M ????????
  1. ??????.
  2. ????.

?????
????????
M ?????????. ? A-1?????????.
????????????
??????????
?? ?
?? ?
?
?
? ?
? ?
?? ? ??
?? ?? ?
6
Wavelet????????
7
Wavelet???????? ??wavelet??(DWT)
L ???????
W?????
8
Wavelet????????
??
9
Wavelet????????
????????
??wavelet????????
10
Wavelet???????? wavelet???
  • DWT??????

Times
Sherman 4 (n1104)
  • ???????????

0.4
  • Daubechies 4
  • ?????
  • ?????
  • ????????
  • Haar
  • ?????
  • ?????
  • ????????

????
85
87
Daubechies4
Haar
11
Finger pattern??????
12
Finger pattern?????? ???????
????????
??? ??????????? ????????, ??? ????????,
QR?? ???n ????????.
??????
QR?????????????, Finger pattern???????????.
?????, ????????????????.
  • QR??
  • ????

13
Finger pattern??????
???
???
A(,Sj) mj(Sj)
A(,Sj) mj(Sj)
14
Finger 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)

??
  • GMRES
  • ?????
  • ????

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???????.
  • ??, ???????????????????? ????????.
  • ?????????????????????.
  • ?????
  • ???????????????
  • ??????????????
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