 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 8 | 1/1 | 返回列表 |
| 查看: 2772 | 回復(fù): 7 | ||
[求助]
fortran中計算線性積分
|
|
請教大師，我現(xiàn)計算下面圖片的積分，用梯形積分法計算不知道如何編寫，請求哪位高手，給些指點(diǎn) LE~@)[C[91$T2D{3[GK}`(5.jpg |
回復(fù)此樓» 猜你喜歡
070300化學(xué)求調(diào)劑
已經(jīng)有3人回復(fù)
-
311求調(diào)劑
已經(jīng)有3人回復(fù)
-
生物學(xué)調(diào)劑
已經(jīng)有5人回復(fù)
-
269專碩求調(diào)劑
已經(jīng)有6人回復(fù)
-
08工科 320總分 求調(diào)劑
已經(jīng)有8人回復(fù)
-
尋找調(diào)劑
已經(jīng)有3人回復(fù)
-
291 求調(diào)劑
已經(jīng)有3人回復(fù)
-
一志愿北京化工大學(xué)070300 學(xué)碩336求調(diào)劑
已經(jīng)有8人回復(fù)
-
一志愿東華大學(xué)化學(xué)070300，求調(diào)劑
已經(jīng)有6人回復(fù)
-
318求調(diào)劑
已經(jīng)有7人回復(fù)
» 本主題相關(guān)價值貼推薦，對您同樣有幫助:
- matlab 解非線性偏微分方程組
已經(jīng)有6人回復(fù)
- 相場法fortran源代碼
已經(jīng)有166人回復(fù)
- 求fortran計算方法指導(dǎo) 14元非線性方程組 之前8元的使用bfs法能解14元解不了呀求指導(dǎo)
已經(jīng)有4人回復(fù)
- 如何用matlab求積分中一個變量的值，積分的值已知。
已經(jīng)有5人回復(fù)
- FORTRAN90標(biāo)準(zhǔn)函數(shù)及IMSL標(biāo)準(zhǔn)函數(shù)庫
已經(jīng)有166人回復(fù)
- fortran循環(huán)求助
已經(jīng)有3人回復(fù)
- Fortran 函數(shù)中的循環(huán)無法進(jìn)行
已經(jīng)有4人回復(fù)
- fortran語言模擬靜止流體中顆粒的沉積可行嗎？
已經(jīng)有8人回復(fù)
- 用fortran程序遺傳算法解非線性方程組
已經(jīng)有7人回復(fù)
- 二階非線性微分方程求解
已經(jīng)有14人回復(fù)
- VS20？？+intel visual fortran2011XE做并行計算的，能介紹一下經(jīng)驗嗎？
已經(jīng)有19人回復(fù)
- 求一個mathmetica的程序
已經(jīng)有10人回復(fù)
- 我編的Simpson積分法fortran程序給不出結(jié)果，大俠們看看哪里出了問題？
已經(jīng)有4人回復(fù)
- 請問，我想用fortran計算統(tǒng)計中的p值以及95%信度空間
已經(jīng)有4人回復(fù)
- 【求助】求解非線性方程
已經(jīng)有8人回復(fù)
chembetsey
木蟲 (小有名氣)
- 應(yīng)助: 125 (高中生)
- 金幣: 3820.1
- 散金: 5
- 紅花: 9
- 帖子: 262
- 在線: 281.8小時
- 蟲號: 1781694
- 注冊: 2012-04-27
- 專業(yè): 理論和計算化學(xué)
2樓2012-12-31 00:50:06
|
我用的是BHMIE代碼，對原程序修改，可計算相函數(shù)P（θ），但是計算截止誤差的T的積分不知道如何插入，我想用梯形面積積分寫這段代碼。 ! 用Mie算前向截止誤差和相函數(shù)隨粒徑的變化的情況 ! 2012年12月17日 PROGRAM CALLBH ! CALLBH CALCULATES THE SIZE PARAMETER (X) AND RELATIVE REFRACTIVE ! & INDEX (REFREL) FOR A GIVEN SPHERE REFRACTIVE INDEX, MEDIUM REFRACTIVE ! & INDEX , RADIUS, AND FREE SPACE WAVELENGTH. IT THEN CALLS BUMIE, THE SUBROUTINE ! & THAT COMPUTES AMPLITUDE SCATTERING MATRIX ELEMENTS AND EFFICIENCIES COMPLEX REFREL, S1(200),S2(200) !REFREL 是球的相對折射率 WRITE(*,11) ! REFMED (REAL) REFRACTIVE INDEX OF SURROUNDING MEDIUM !周圍介質(zhì)的折射率 REFMED=1.0 REFRE=1.5 REFIM=0.0 ! REFRACTIVE INDEX OF SPHERE = REFRE + i*REFIM REFREL=CMPLX(REFRE,REFIM)/REFMED WRITE (*,12) REFMED,REFRE,REFIM ! RADIUS (RAD) AND WAVELENGTH (WAVEL) SAME UNITS RAD=.500 WAVEL=.532 X=2.*3.14159265*RAD*REFMED/WAVEL WRITE (*,13) RAD,WAVEL WRITE (*,14) X ! NANG = NUMBER OF ANGLES BETWEEN 0 AND 90 DEGREES ! MATRIX ELEMENTS CALCULATED AT 2*NANG - 1 ANGLES ! INCLUDING 0, 90, AND 180 DEGREES NANG=14 DANG=1.570796327/FLOAT(NANG-1) CALL BHMIE(X,REFREL,NANG,S1,S2,QEXT,QSCA,QBACK) WRITE (*,65) QSCA,QEXT,QBACK WRITE (*,17) ! S33 AND S34 MATRIX ELEMENTS NORMALIZED BY S11 ! S11 IS NORMALIZED TO 1.0 IN THE FORWARD DIRECTION ! POL=DEGEREE OF POLARIZATION (INCIDENT UNPOLARIZED LIGHT) S11NOR=0.5*(CABS(S2(1))**2+CABS(S1(1))**2) NAN=2*NANG-1 DO 355 J=1,NAN AJ=J S11=0.5*CABS(S2(J))*CABS(S2(J)) S11=S11+0.5*CABS(S1(J))*CABS(S1(J)) S12=0.5*CABS(S2(J))*CABS(S2(J)) S12=S12-0.5*CABS(S1(J))*CABS(S1(J)) POL=-S12/S11 S33=REAL(S2(J)*CONJG(S1(J))) S33=S33/S11 S34=AIMAG(S2(J)*CONJG(S1(J))) S34=S34/S11 S11=S11/S11NOR ANG=DANG*(AJ-1.)*57.2958 PHMIE=(CABS(S1(J))*CABS(S1(J))+CABS(S2(J))*CABS(S2(J)))/(2*3.14159265*X*X*QSCA) ！添加的 355 WRITE (*,75) ANG,S11,POL,S33,S34,PHMIE ！修改 65 FORMAT (//,1X,"QSCA= ",E13.6,3X,"QEXT=",E13.6,3X,"QBACK= ",E13.6) 75 FORMAT (1X,F6.2,2X,E13.4,2X,E13.4,2X,E13.4,2X,E13.4,2X,E13.4,1X,F6.2) 11 FORMAT (/"SPHERE SCATTERING PROGRAM"//) 12 FORMAT (5X,"REFMED= ",F8.4,3X,"REFRE= ",E14.6,3X,"REFIM= ",E14.6) 13 FORMAT (5X,"SPHERE RADIUS = ",F7.3 ,3X,"WAVELENGTH = ", F7.4) 14 FORMAT (5X,"SIZE PARAMETER = ",F8.3/) 17 FORMAT (//,2X,"ANGLE",7X,"Sll",13X,"POL",13X,"S33",13X,"S34",13X,"PHMIE"//) ！修改 STOP END ! SUBROUTINE BHMIE CALCULATES AMPLITUDE SCATTERING MATRIX ! ELEMENTS AND EFFICIENCIES FOR EXTINCTION, TOTAL SCATTERING ! AND BACKSCATTERING FOR A GIVEN SIZE PARAMETER AND ! RELATIVE REFRACTIVE INDEX SUBROUTINE BHMIE (X,REFREL,NANG,S1,S2,QEXT, QSCA,QBACK) DIMENSION AMU(100),THETA(100),PI(100),TAU(100),PI0(100),PI1(100) COMPLEX D(3000),Y,REFREL,XI,XI0,XI1,AN,BN,S1(200),S2(200) !AN和BN為散射系數(shù) DOUBLE PRECISION PSI0,PSI1,PSI,DN,DX DX=X !把形狀因子X賦給DX Y=X*REFREL ! SERIES TERMINATED AFTER NSTOP TERMS XSTOP = X+4.*X**0.3333+2.0 !XSTOP是前面的近似 NSTOP=XSTOP YMOD=CABS(Y) NMX=AMAX1(XSTOP,YMOD)+15 !比較兩者的最大值再加15 DANG=1.570796327/FLOAT(NANG-1) !求總角度數(shù) DO 555 J=1,NANG THETA(J)=(FLOAT(J)-1.)*DANG 555 AMU(J)=COS(THETA(J)) ! LOGARITHMIC DERIVATIVE D(J) CALCULATED BY DOWNWARD ! RECURRENCE BEGINNING WITH INITIAL VALUE 0.0 + I*0.0 用初值為 0.0 + I*0.0 的下遞歸計算對數(shù)導(dǎo)數(shù) ! AT J = NMX D(NMX)=CMPLX(0.0,0.0) ! NMX=0.0+i0.0為遞歸初值 NN=NMX-1 DO 120 N=1,NN RN=NMX-N+1 120 D(NMX-N)=(RN/Y)-(1./(D(NMX-N+1)+RN/Y)) DO 666 J=1,NANG PI0(J)=0.0 666 PI1(J)=1.0 NN = 2*NANG-1 DO 777 J=1,NN S1(J)=CMPLX(0.0,0.0) 777 S2(J)=CMPLX(0.0,0.0) ! RICCATI-BESSEL FUNCTIONS WITH REAL ARGUMENT X 用上遞歸計算實元X的黎卡迪-貝塞爾函數(shù) ! CALCULATED BY UPWARD RECURRENCE PSI0=DCOS(DX) PSI1=DSIN(DX) CHI0=-SIN(X) CHI1=COS(X) APSI0=PSI0 APSI1=PSI1 XI0=CMPLX(APSI0,-CHI0) XI1=CMPLX(APSI1,-CHI1) QSCA=0.0 N=1 200 DN=N !DN是向下或向上遞歸的結(jié)果 RN=N FN=(2.*RN+1.)/(RN*(RN+1.)) PSI=(2.*DN-1.)*PSI1/DX-PSI0 APSI=PSI CHI=(2.*RN-1.)*CHI1/X-CHI0 XI=CMPLX(APSI, -CHI) AN =(D(N)/REFREL+RN/X)*APSI-APSI1 AN=AN/((D(N)/REFREL+RN/X)*XI-XI1) BN=(REFREL*D(N) + RN/X)*APSI-APSI1 BN =BN/((REFREL*D(N)+ RN/X)*XI-XI1) QSCA = QSCA+(2.*RN+1.)*(CABS(AN)*CABS(AN) + CABS(BN)*CABS(BN)) DO 789 J=1,NANG JJ=2*NANG-J PI(J) =PI1(J) TAU(J)=RN*AMU(J)*PI(J)-(RN +1.)*PI0 (J) P=(-1.)**(N-1) S1(J) = S1(J)+FN*(AN*PI(J)+BN*TAU(J)) T = (-1.)**N S2(J) = S2(J) + FN*(AN*TAU(J)+BN*PI(J)) IF(J.EQ.JJ) GO TO 789 S1(JJ) = S1(JJ) + FN*(AN*PI(J)*P+BN*TAU(J)*T) S2(JJ) = S2(JJ) + FN*(AN*TAU(J)*T + BN*PI(J)*P) 789 CONTINUE PSI0 = PSI1 PSI1=PSI APSI1=PSI1 CHI0=CHI1 CHI1=CHI XI1 = CMPLX(APSI1,-CHI1) N=N+1 RN=N DO 999 J=1,NANG PI1(J)=((2.*RN-1.)/(RN-1.))*AMU(J)*PI(J) PI1(J)=PI1(J)-RN*PI0(J)/(RN-1.) 999 PI0(J)=PI(J) IF (N-1-NSTOP) 200,300,300 300 QSCA=(2./(X*X))*QSCA QEXT=(4./(X*X))*REAL(S1(1)) QBACK=(4./(X*X))*CABS(S1(2*NANG-1))*CABS(S1(2*NANG-1)) RETURN END |
3樓2012-12-31 08:30:30
4樓2012-12-31 08:35:30
5樓2012-12-31 08:39:53
chembetsey
木蟲 (小有名氣)
- 應(yīng)助: 125 (高中生)
- 金幣: 3820.1
- 散金: 5
- 紅花: 9
- 帖子: 262
- 在線: 281.8小時
- 蟲號: 1781694
- 注冊: 2012-04-27
- 專業(yè): 理論和計算化學(xué)
6樓2012-12-31 14:04:09
7樓2012-12-31 16:47:49
8樓2012-12-31 16:56:29
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 簡哲2013 的主題更新
| 8 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 08工科 320總分 求調(diào)劑 +8 | 梨花珞晚風(fēng) 2026-03-17 | 8/400 |
|
|---|---|---|---|---|
|
[考研] 一志愿武理材料工程348求調(diào)劑 +3 | ￣^￣゜汗 2026-03-19 | 5/250 |
|
|
|
[考研] 招08考數(shù)學(xué) +3 | laoshidan 2026-03-20 | 7/350 |
|
|
|
[考研] 286求調(diào)劑 +10 | Faune 2026-03-21 | 10/500 |
|
|
|
[考研] 考研調(diào)劑 +3 | 呼呼？~+123456 2026-03-21 | 3/150 |
|
|
|
[考研] 求調(diào)劑 +4 | 要好好無聊 2026-03-21 | 4/200 |
|
|
|
[考研] 材料學(xué)碩333求調(diào)劑 +3 | 北道巷 2026-03-18 | 3/150 |
|
|
|
[考研] 材料 271求調(diào)劑 +5 | 展信悅_ 2026-03-21 | 5/250 |
|
|
|
[考研] 求調(diào)劑 +3 | 白QF 2026-03-21 | 3/150 |
|
|
|
[考研] 一志愿華南師大 070300（化學(xué)）304分求調(diào)劑 +3 | 0703武芊慧雪304 2026-03-18 | 3/150 |
|
|
|
[考研] 304求調(diào)劑 +6 | 曼殊2266 2026-03-18 | 6/300 |
|
|
|
[考研] 296求調(diào)劑 +6 | www_q 2026-03-18 | 10/500 |
|
|
|
[考研] 一志愿南昌大學(xué)，327分，材料與化工085600 +9 | Ncdx123456 2026-03-19 | 9/450 |
|
|
|
[考研] 求調(diào)劑，一志愿:南京航空航天大學(xué)大學(xué) ，080500材料科學(xué)與工程學(xué)碩，總分289分 +4 | @taotao 2026-03-19 | 4/200 |
|
|
|
[考研] 289求調(diào)劑 +6 | 懷瑾握瑜l 2026-03-20 | 6/300 |
|
|
|
[考研] 一志愿吉林大學(xué)材料學(xué)碩321求調(diào)劑 +11 | Ymlll 2026-03-18 | 15/750 |
|
|
|
[考研] 求調(diào)劑 +3 | eation27 2026-03-20 | 3/150 |
|
|
|
[考研] 生物學(xué)調(diào)劑招人！��！ +3 | 山海天嵐 2026-03-17 | 4/200 |
|
|
|
[考研] 085600材料與化工調(diào)劑 324分 +10 | llllkkkhh 2026-03-18 | 12/600 |
|
|
|
[考研] 一志愿福大288有機(jī)化學(xué)，求調(diào)劑 +3 | 小木蟲200408204 2026-03-18 | 3/150 |
|