【正文】 39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。,STATUS=39。,FORM=39。) WRITE(2,*)(Y_LOW(I),I=1,NFFT) CLOSE(2)CCCCCCCCCCC 帶通濾波因子的設(shè)計 CCCCCCCCCCC DO 70 I=1,NFFT/2 IF((I*).AND.(I*))THEN H_BAND(I)= ELSE H_BAND(I)= END IF70 CONTINUECCCCCCCCC 使濾波器理想化（對稱）CCCCCCCCCC DO 80 I=NFFT/2+1,NFFT F=I*DF H_LOW(I)=H_BAND(NFFTI+1)80 CONTINUECCCCCCCCCCCCCCC 實現(xiàn)濾波 CCCCCCCCCCCCCCCCC DO 90 I=1 , NFFT90 TEMP(I)=C(I)*H_BAND(I)CCCCCCCCCCCCCCC 向時間域變換 CCCCCCCCCCCCC CALL FFT(NFFT,TEMP,) DO 100 I=1 , NFFT100 Y_BAND(I)=REAL(TEMP(I)) OPEN(3,FILE=39。,STATUS=39。,FORM=39。) OPEN(2,FILE=39。,STATUS=39。,FORM=39。) WRITE(3,*)(XWAVE_60ZS(I),I=1,60) CLOSE(3)CCCCCCCCCCCCC 對補(bǔ)零數(shù)據(jù)的分析 CCCCCCCCCCCCCCCCCCCCCCCCCCCC 對函數(shù) SIN 的分析 CCCCCCCCCCCCCCCC OPEN(4,FILE=39。,STATUS=39。,FORM=39。) WRITE(4,*)(Y_LINEAR(I),I=1,101) CLOSE(4) ENDCCCCCCCCCCCCCC 線性卷積子程序 CCCCCCCCCCCCCC SUBROUTINE CON(A,B,C,I,J,K) DIMENSION A(I),B(J),C(K) DO 1 K1=1,K 1 C(K1)= DO 2 I1=1,I DO 2 I2=1,J II=I1+I21 2 C(II)=C(II)+A(I1)*B(I2)* RETURN ENDCCCCCCCCCCCCCCC 圓周卷積子程序 CCCCCCCCCCCCCC SUBROUTINE CIRCON(X,H,Y,N) REAL X(N),H(N),Y(N) DO I=1,N Y(I)= ENDDO DO I=1,N DO J=1,N IF() Y(I)=Y(I)+X(J)*H(IJ) ENDDO ENDDO END8. 最小平方反濾波CCCCCCCCCC 兩種反射系數(shù)序列的對比 CCCCCCCCCC PROGRAM MAIN REAL B(12),R(200),X_CONV(211),RXX(211) REAL A(211),A_CONV(270) DATA B/, OPEN(1,FILE=39。,STATUS=39。,FORM=39。) DO 100 I=1,10 READ(1,*)(X(I,J),J=1,100)100 CONTINUE PRINT*,39。,FORM=39。,STATUS=39。) READ(1,*)(R(I),I=1,200)CCCCCCCCCCCCCC 求合成地震記錄 CCCCCCCCCCCCCC CALL CON(R,B,X_CONV,200,12,211)CCCCCCCCCCCC 求地震子波的自相關(guān) CCCCCCCCCCCC CALL AUTCOR(211,211,X_CONV,RXX)CCCCCCCCCCCCCCC 求反濾波因子 CCCCCCCCCCCCCCC CALL PEO(211,RXX,A) OPEN(2,FILE=39。,FORM=39。,STATUS=39。) DO 31 I=61,64 31 XSIN(I)= DO 32 I=1,64 32 XSIN_64C(I)=CMPLX(XSIN(I),) CALL DFT(64,XSIN_64C,) DO 33 I=1,6433 XSIN_R(I)=REAL(XSIN_64C(I)) DO 34 I=1,6434 XSIN_I(I)=AIMAG(XSIN_64C(I)) DO 35 I=1,6435 XSIN_64S(I)=SQRT(XSIN_R(I)**2+XSIN_I(I)**2) WRITE(4,*)(XSIN_64S(I),I=1,64) CLOSE(4) OPEN(5,FILE=39。,FORM=39。,STATUS=39。) K=LOG()/LOG() IF(2**)THEN K=K+1 ENDIF NFFT=2**K DO 10,I=50,50 IF()THEN H(I+51)=*F ELSE H(I+51)=SIN(2*PI**I*DT)/(PI*I*DT) END IF10 CONTINUE DO 20,I=102,12820 H(I)= DO 30,I=1,12830 H2(I)=CMPLX(H(I),) CALL FFT(128,H2,) DO 40,I=1,128 H2_R(I)=REAL(H2(I)) H2_I(I)=AIMAG(H2(I)) H_S(I)=(H2_R(I)**2+H2_I(I)**2)40 CONTINUE WRITE(2,*)(H_S(I),I=1,128) WRITE(1,*)(H(I),I=1,128) CLOSE(1) CLOSE(2) END CCCCCCCCCCCCC FFT 子程序 CCCCCCCCCCCCCC SUBROUTINE FFT(LX,CX,SIGNI) COMPLEX CX(LX),CARG,CEXP,CW,CTEMP J=1 SC= IF()SC= SIG=SIGNI DO 30 I=1,LX IF()GO TO 10 CTEMP=CX(J)*SC CX(J)=CX(I)*SC CX(I)=CTEMP 10 M=LX/2 20 IF()GO TO 30 J=JM M=M/2 IF()GO TO 20 30 J=J+M L=1 40 ISTEP=2*L DO 50 M=1,L CARG=(,)*(*SIG*(M1))/L CW=CEXP(CARG) DO 50 I=M,LX,ISTEP CTEMP=CW*CX(I+L) CX(I+L)=CX(I)CTEMP 50 CX(I)=CX(I)+CTEMP L=ISTEP IF()GO TO 40 RETURN END5. 頻譜分析CCCCCCCCCCCCC 頻譜分析 CCCCCCCCCCCCCC PROGRAM MAIN PARAMETER (PI=,DT=) REAL XSIN(200),X(200),WAVE(200) REAL X_SIN_R(200),X_SIN_I(200) REAL X_R(200),X_I(200) REAL X_WAVE_R(200),X_WAVE_I(200) REAL SINSPRT(200),XSPRT(200),WAVESPRT(200) REAL DF COMPLEX XSIN_C(200),X_C(200),X_WAVE_C(200) CCCCCCCCCCCC 對 SIN 的分析 CCCCCCCCCCCC DO 100 I=1,128 XSIN(I)=SIN(2*I*PI/)100 CONTINUECCCCCCCCC 是數(shù)據(jù)轉(zhuǎn)換成復(fù)數(shù)形式 CCCCCCCCCC DO 200 I=1,128200 XSIN_C(I)=CMPLX(XSIN(I),) CALL FFT(128,XSIN_C,) DO 300 I=1,128 300 X_SIN_R(I)=REAL(XSIN_C(I)) DO 400 I=1,128400 X_SIN_I(I)=AIMAG(XSIN_C(I)) OPEN(1,FILE=39。,FORM=39。,STATUS=39。) WRITE(3,*)(Y_BAND(I),I=1,NFFT) CLOSE(3) CLOSE(1) ENDCCCCCCCCCCCCCCCCC子程序CCCCCCCCCCCCCCCCCCCCC LX 為輸入數(shù)據(jù)的點(diǎn)數(shù) CCCCCCCCCCCCCCCCCCCCCC CX 為復(fù)型數(shù)組 CCCCCCCCCCCCCCCCCCCCCCCCCCC SIGNI 為轉(zhuǎn)換標(biāo)志 CCCCCCCCCCCCCCCCCCCC SUBROUTINE FFT(LX,CX,SIGNI) COMPLEX CX(LX),CARG,CEXP,CW,CTEMP J=1 SC= IF()SC= SIG=SIGNI DO 300 I=1,LX IF()GO TO 100 CTEMP=CX(J)*SC CX(J)=CX(I)*SC CX(I)=CTEMP 100 M=LX/2 2