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发表于 2014-8-30 21:59:22
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菜鸟,不懂怎么把附件设成免费唉
我还是直接帖程序吧
C THIS IS A PROGRAM OF MAXIMUM ENTROPY SPECTRUM
C ANALYSIS (MESA) FOR A TIME SERIES
PROGRAM MESA
PARAMETER (N=44, M=22)
DIMENSION X(N),T(N),SE(N,M)
DIMENSION B1(N),B2(N),A(N),AA(N),FI(M),SIGMA(N)
CHARACTER*9 FNAME1,FNAME2
C ***************************************************
C * N: SAMPLE SIZE OF THE TIME SERIES *
C * M: MAXIMUM LAG TIME LENGTH *
C * X(N): TIME SERIES *
C * T(N):LENGTH OF PERIOD *
C * SE(N,M): MAXIMUM ENTROPY SPECTRUM VALUES *
C ***************************************************
WRITE(*,*) 'PLEASE ENTER THE DATA FILE NAME:'
READ(*,'(A)') FNAME1
WRITE(*,*) 'PLEASE ENTER THE OUTPUT FILE NAME:'
READ(*,'(A)') FNAME2
NW2=1
OPEN (7,FILE=FNAME1)
READ (7,*,END=9)(X(I),I=1,N)
9 CONTINUE
CLOSE (7)
CALL SMESA(X,N,M,NW2,K0,T,SE,FI,SIGMA,A,AA,B1,B2)
OPEN (8,FILE=FNAME2)
WRITE(8,80)
80 FORMAT(20X,'*******MAXIMUM ENTROPY SPECTRUM ANALYSIS*******'/)
WRITE (8,90)
WRITE (8,100) (L,T(L),SE(L,K0), L=1,M)
CLOSE(8)
90 FORMAT (1X,7X,1HL,4X,1HT,10X,2HSE/,
& 8X,23H-----------------------)
100 FORMAT (1X,I8,F7.2,E15.7)
STOP
END
CCC------------------------------END------------------------------------CCC
SUBROUTINE SMESA(X,N,K,NW,K0,T,SE,FI,SIGMA,A,AA,B1,B2)
DIMENSION X(N),T(N),SE(N,K)
DIMENSION B1(N),B2(N),A(N),AA(N),FI(K),SIGMA(N)
C
C----------------------------------------------------------------------C
C
IF (NW.EQ.0) GOTO 10
WRITE(*,'(/9X,1Hk,6X,5HFI(K))')
10 S=0.
DO 50 I=1,N
50 S=S+X(I)
S=S/N
DO 60 I=1,N
X(I)=X(I)-S
60 CONTINUE
S=0.
DO 11 I=1,N
11 S=S+X(I)*X(I)
SIGMA(1)=S/N
M=1
B1(1)=X(1)
B2(N-1)=X(N)
DO 12 J=2,N-1
B1(J)=X(J)
12 B2(J-1)=X(J)
IF (NW.EQ.0) GOTO 301
WRITE(*,'(I10,F12.3)') M, SIGMA(1)
301 GOTO 101
102 M=M+1
DO 13 J=1,M-1
13 AA(J)=A(J)
DO 14 J=1,N-M
B1(J)=B1(J)-AA(M-1)*B2(J)
14 B2(J)=B2(J+1)-AA(M-1)*B1(J+1)
101 COM=0.
DEN=0.
DO 15 J=1,N-M
COM=COM+B1(J)*B2(J)
15 DEN=DEN+B1(J)**2+B2(J)**2
A(M)=2.0*COM/DEN
SIGMA(M+1)=SIGMA(M)*(1-A(M)**2)
IF(M.EQ.1)GOTO 102
103 DO 16 J=1,M-1
A(J)=AA(J)-A(M)*AA(M-J)
16 CONTINUE
FI(M) = (FLOAT(N+M)/FLOAT(N-M))*SIGMA(M+1)
IF (FI(M-1).lt.FI(M-2).and.FI(M-1).lt.FI(M)) then
K0=M-1
GOTO 555
ELSE
CONTINUE
ENDIF
IF (NW.EQ.0) GOTO 300
WRITE(*,'(I10,F12.3)') M, FI(m)
300 IF (M.EQ.K) GOTO 555
DO 19 I=1,K
F1=0.
F2=0.
DO 18 J=1,M
E=2.0*3.1416*FLOAT(J)*FLOAT(I)/FLOAT(N)
F1=F1+A(J)*COS(E)
18 F2=F2+A(J)*SIN(E)
SE(I,M) = SIGMA(M+1)/((1.0-F1)**2+F2**2)
19 CONTINUE
IF (M.LT.K) GOTO 102
555 DO 150 I=1,K
T(I) = 2.*K/float(I)
150 CONTINUE
IF (NW.EQ.0) GOTO 999
WRITE (*,'(/,12x,4Hk0 =,i4/)') K0
999 RETURN
END
CCC-----------------------------END----------------------------------
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