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| 【懸賞金幣】回答本帖問題，作者ckm0811將贈(zèng)送您 10 個(gè)金幣 | ||
ckm0811新蟲 (初入文壇)
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[求助]
1stopt 7參數(shù)擬合求助 已有2人參與
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需要根據(jù)兩個(gè)式子（一個(gè)微分方程，一個(gè)代數(shù)方程）擬合7個(gè)未知參數(shù)fac(1)~fac(7)，網(wǎng)上下載的軟件有參數(shù)限制，想向有正版軟件的朋友求助，幫忙擬合一下。寫了兩版，程序分別如下。完整程序和數(shù)據(jù)放在了文件里，不知為什么上傳失敗，只能貼一下網(wǎng)盤鏈接，麻煩大家了。 鏈接：https://pan.baidu.com/s/18yjg6HL9hhQ5hmjGdjFhEQ 提取碼：8xmm 第一種： //title "fit"; parameter fac(1:7); variable t,lamb,pa,p,lambv; odefunction lambv'=((1/3/fac(7))*(fac(1)*((lamb/lambv)^fac(2)-(lambv/lamb)^(0.5*fac(2)))+fac(3)*((lamb/lambv)^fac(4)-(lambv/lamb)^(0.5*fac(4)))+fac(5)*((lamb/lambv)^fac(6)-(lambv/lamb)^(0.5*fac(6))))); p=(pa+fac(1)*((lamb/lambv)^fac(2)/lamb-(lambv/lamb)^(fac(2)*0.5)/lamb)+fac(3)*((lamb/lambv)^fac(4)/lamb-(lambv/lamb)^(fac(4)*0.5)/lamb)+fac(5)*((lamb/lambv).^fac(6)/lamb-(lambv/lamb)^(fac(6)*0.5)/lamb)); //根據(jù)上面兩個(gè)式子擬合fac(1)~fac(7)，共計(jì)7個(gè)參數(shù)。lambv為中間變量 data; //t,lamb,pa,p 第二種： //title "fit"; parameter fac(1:7); variable t,lamb,pa,p; conststr lambvdif=((1/3/fac(7))*(fac(1)*((lamb/lambv)^fac(2)-(lambv/lamb)^(0.5*fac(2)))+fac(3)*((lamb/lambv)^fac(4)-(lambv/lamb)^(0.5*fac(4)))+fac(5)*((lamb/lambv)^fac(6)-(lambv/lamb)^(0.5*fac(6))))); function p=(pa+fac(1)*((lamb/lambv)^fac(2)/lamb-(lambv/lamb)^(fac(2)*0.5)/lamb)+fac(3)*((lamb/lambv)^fac(4)/lamb-(lambv/lamb)^(fac(4)*0.5)/lamb)+fac(5)*((lamb/lambv).^fac(6)/lamb-(lambv/lamb)^(fac(6)*0.5)/lamb)); //根據(jù)上面兩個(gè)式子擬合fac(1)~fac(7)，共計(jì)7個(gè)參數(shù)。lambv為中間變量 data; //t,lamb,pa,p |
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獨(dú)孤神宇
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2樓2021-07-20 22:43:35
ckm0811
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您好，我用微分方程組的形式寫了一下程序，可以麻煩您幫我跑一下看看嗎 Parameter fac(1:7); ConstStr lambdif=A*w*cos(w*t); lambvdif=((1/3/fac(7))*(fac(1)*((lamb/lambv)^fac(2)-(lambv/lamb)^(0.5*fac(2)))+fac(3)*((lamb/lambv)^fac(4)-(lambv/lamb)^(0.5*fac(4)))+fac(5)*((lamb/lambv)^fac(6)-(lambv/lamb)^(0.5*fac(6))))); Variable t,lamb,pa,p; Constant A=0.02,w=2*pi*0.1; ODEFunction p'=pa+fac(1)*((fac(2)-1)*lamb^(fac(2)-2)*lambv^(-fac(2))*lambdif-fac(2)*lamb^(fac(2)-1)*lambv^(-fac(2)-1)*lambvdif+(0.5*fac(2)+1)*lamb^(-0.5*fac(2)-2)*lambv^(0.5*fac(2))*lambdif-0.5*fac(2)*lamb^(-0.5*fac(2)-1)*lambv^(0.5*fac(2)-1)*lambvdif)+fac(3)*((fac(4)-1)*lamb^(fac(4)-2)*lambv^(-fac(4))*lambdif-fac(4)*lamb^(fac(4)-1)*lambv^(-fac(4)-1)*lambvdif+(0.5*fac(4)+1)*lamb^(-0.5*fac(4)-2)*lambv^(0.5*fac(4))*lambdif-0.5*fac(4)*lamb^(-0.5*fac(4)-1)*lambv^(0.5*fac(4)-1)*lambvdif)+fac(5)*((fac(6)-1)*lamb^(fac(6)-2)*lambv^(-fac(6))*lambdif-fac(6)*lamb^(fac(6)-1)*lambv^(-fac(6)-1)*lambvdif+(0.5*fac(6)+1)*lamb^(-0.5*fac(6)-2)*lambv^(0.5*fac(6))*lambdif-0.5*fac(6)*lamb^(-0.5*fac(6)-1)*lambv^(0.5*fac(6)-1)*lambvdif); //根據(jù)上面兩個(gè)式子擬合fac(1)~fac(7)，共計(jì)7個(gè)參數(shù)。lambv為中間變量 Data; //t,lamb,pa,p 0 0.959926667213440 -0.218715993911157 -0.0609662220570843 0.0100000000000000 0.960060000419617 -0.217953308698164 -0.0601988575052841 0.0200000000000000 0.960183332761129 -0.217248055533299 -0.0586004556313694 0.0300000000000000 0.960310000181198 -0.216523956896799 -0.0598319351599084 0.0400000000000000 0.960420000155767 -0.215895323573625 -0.0592181922334017 0.0500000000000000 0.960559999942780 -0.215095494743585 -0.0577557643513868 0.0600000000000000 0.960676667292913 -0.214429178596415 -0.0563035568552177 0.0700000000000000 0.960810000101725 -0.213667918567369 -0.0562269347026404 0.0800000000000000 0.960936667521795 -0.212944948052557 -0.0564259238264651 0.0900000000000000 0.961046667098999 -0.212317295943482 -0.0537828971720869 0.100000000000000 0.961189999580383 -0.211499705156834 -0.0547939745570696 0.110000000000000 0.961310000419617 -0.210815425359240 -0.0536558808743694 0.120000000000000 0.961439999739329 -0.210074361156256 -0.0552049394966249 0.130000000000000 0.961553332805634 -0.209428498212864 -0.0533279895347856 0.140000000000000 0.961696667273839 -0.208611922930574 -0.0547945686849519 0.150000000000000 0.961800000270208 -0.208023415546762 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1.22000000000000 0.973826666673024 -0.140531753167651 -0.0103566043799177 1.23000000000000 0.973903333743413 -0.140107729521413 -0.0103308521496187 1.24000000000000 0.974006667137146 -0.139536343542061 -0.0107882714921145 1.25000000000000 0.974090000391007 -0.139075650643072 -0.0109397122041476 1.26000000000000 0.974159998893738 -0.138688746536607 -0.0107228623140689 1.27000000000000 0.974263333479563 -0.138117700027004 -0.00990603193088691 1.28000000000000 0.974366667270660 -0.137546797074590 -0.00938155311232515 1.29000000000000 0.974436666568120 -0.137160140979443 -0.00888102709894390 1.30000000000000 0.974533332983653 -0.136626288218709 -0.00854232956056897 1.31000000000000 0.974633332888285 -0.136074153771862 -0.00832410978762717 1.32000000000000 0.974706666469574 -0.135669336065565 -0.00812692033021610 1.33000000000000 0.974786666234334 -0.135227799251810 -0.0105097329350413 1.34000000000000 0.974886666933696 -0.134675989657087 -0.00904439075924608 1.35000000000000 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-0.00257592899462379 2.15000000000000 0.979503333568573 -0.109340960272890 -0.00100693017391792 2.16000000000000 0.979539999961853 -0.109140830962900 0 2.17000000000000 0.979563333590825 -0.109013482207766 -0.00231125194412904 2.18000000000000 0.979586666822433 -0.108886142482770 -0.00178229371672884 2.19000000000000 0.979620000123978 -0.108704239870753 -0.00255076939499388 2.20000000000000 0.979636666774750 -0.108613293814128 -0.000800200785157157 2.21000000000000 0.979660000801086 -0.108485971310552 -0.000316767290521802 2.22000000000000 0.979683332840602 -0.108358666504859 -0.00268006280942534 2.23000000000000 0.979709999561310 -0.108213175330761 -0.00203133868584265 2.24000000000000 0.979729999303818 -0.108104064451914 -0.00179167301339058 2.25000000000000 0.979743333260218 -0.108031322328111 -0.00116367640768096 2.26000000000000 0.979763333797455 -0.107922215506472 -0.00156989833625272 2.27000000000000 0.979779999653498 -0.107831303865221 -0.00365339419267337 2.28000000000000 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-0.106813282816397 -0.00187935668663900 2.41999999999999 0.979966666698456 -0.106813280649765 -0.00281146242896666 2.42999999999999 0.979986666043600 -0.106704236513409 -0.00159156917397298 2.43999999999999 0.979986666043599 -0.106704236513409 -0.00309777741903642 2.44999999999999 0.979996666510900 -0.106649711997507 -0.00203900509764005 2.45999999999999 0.979996666312218 -0.106649713080748 -0.00408489412568898 2.46999999999999 0.980006666580836 -0.106595190904958 -0.00278381246945792 2.47999999999999 0.979993332823118 -0.106667887779729 -0.00195502847452159 2.48999999999999 0.980009999871254 -0.106577017847792 -0.00317893233181643 2.49999999999999 0.980009999871254 -0.106577017847792 -0.00349145617646086 2.50999999999999 0.979996666312218 -0.106649713080748 -0.00456538891362015 2.51999999999999 0.980003333091736 -0.106613365184982 -0.00355205766559430 2.52999999999999 0.980013333161672 -0.106558844930255 -0.00402700105724367 2.53999999999999 0.980003333290418 -0.106613364101758 -0.00414957433208478 2.54999999999999 0.979989999532700 -0.106686061535112 -0.00433136644381113 2.55999999999999 0.979996666510900 -0.106649711997507 -0.00434235118370288 2.56999999999999 0.979986666440964 -0.106704234346875 -0.00503767446651542 2.57999999999999 0.979983332951864 -0.106722409464822 -0.00485320112882950 2.58999999999999 0.979979999462764 -0.106740584722440 -0.00551132775232146 2.59999999999999 0.979960000117620 -0.106849630534705 -0.00544259878187995 2.60999999999999 0.979963332811991 -0.106831458772374 -0.00652889340628113 2.61999999999999 0.979946666558584 -0.106922334147430 -0.00512049086528040 2.62999999999999 0.979943333466848 -0.106940508774776 -0.00446788097646257 2.63999999999999 0.979926666418711 -0.107031392673975 -0.00550887395682280 2.64999999999999 0.979913333654404 -0.107104097540977 -0.00578570436040206 2.65999999999999 0.979910000562668 -0.107122273565258 -0.00790339269069499 2.66999999999999 0.979896666606267 -0.107194987727357 -0.00566738792194890 2.67999999999999 0.979883332649867 -0.107267704125400 -0.00789672304202340 2.68999999999999 0.979879999160767 -0.107285883574300 -0.00702927783211347 2.69999999999999 0.979856667121252 -0.107413130626981 -0.00667694024627001 2.70999999999999 0.979840000073115 -0.107504032692458 -0.00668806982554102 2.71999999999999 0.979820000727971 -0.107613113715511 -0.00945740192394345 2.72999999999999 0.979806666771571 -0.107685842973174 -0.00812179898087077 2.73999999999999 0.979789999723435 -0.107776755523851 -0.00917126175905406 2.74999999999999 0.979766666889191 -0.107904033332083 -0.00972369676888354 2.75999999999999 0.979743333260218 -0.108031322328111 -0.00978176787343009 2.76999999999999 0.979739999771118 -0.108049507649231 -0.0106328714583969 2.77999999999998 0.979706666469574 -0.108231359882885 -0.0113300882239846 2.78999999999998 0.979693333307902 -0.108304103826230 -0.00936222048583495 2.79999999999998 0.979660000403722 -0.108485973478719 -0.0117506887026474 2.80999999999998 0.979639999866486 -0.108595106323666 -0.0119864429172659 2.81999999999998 0.979606666564941 -0.108777000536710 -0.0116921036422925 2.82999999999998 0.979589999914169 -0.108867952892690 -0.0123121088826255 |
3樓2021-07-21 10:38:20
獨(dú)孤神宇
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【答案】應(yīng)助回帖
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這個(gè)可能需要企業(yè)版才能計(jì)算吧。 這個(gè)是否有可能 求解x的解析解？ ，這樣就可以直接帶入p方程擬合 Parameter fac(1:7); Variable t,lamb,pa,p; ParVariable lambv; Constant A=0.02,w=2*pi*0.1; ConstStr lambdif=A*w*cos(w*t), lambvdif=((1/3/fac7)*(fac1*((lamb/lambv)^fac2-(lambv/lamb)^(0.5*fac2))+fac3*((lamb/lambv)^fac4 -(lambv/lamb)^(0.5*fac4))+fac5*((lamb/lambv)^fac6-(lambv/lamb)^(0.5*fac6)))); //InitialODEValue t=0,p=-0.060966222; OdeFunction p'=pa+fac1*((fac2-1)*lamb^(fac2-2)*lambv^(-fac2)*lambdif-fac2*lamb^(fac2-1)*lambv^(-fac2-1)*lambvdif +(0.5*fac2+1)*lamb^(-0.5*fac2-2)*lambv^(0.5*fac2)*lambdif-0.5*fac2*lamb^(-0.5*fac2-1)*lambv^(0.5*fac2-1)*lambvdif) +fac3*((fac4-1)*lamb^(fac4-2)*lambv^(-fac4)*lambdif-fac4*lamb^(fac4-1)*lambv^(-fac4-1)*lambvdif+(0.5*fac4+1)*lamb^(-0.5*fac4-2)*lambv^(0.5*fac4)*lambdif -0.5*fac4*lamb^(-0.5*fac4-1)*lambv^(0.5*fac4-1)*lambvdif)+fac5*((fac6-1)*lamb^(fac6-2)*lambv^(-fac6)*lambdif -fac6*lamb^(fac6-1)*lambv^(-fac6-1)*lambvdif+(0.5*fac6+1)*lamb^(-0.5*fac6-2)*lambv^(0.5*fac6)*lambdif -0.5*fac6*lamb^(-0.5*fac6-1)*lambv^(0.5*fac6-1)*lambvdif); Data; 0 0.959926667 -0.218715994 -0.060966222 0.25 0.963063333 -0.200840559 -0.046836278 0.5 0.96612 -0.183553472 -0.035042256 0.75 0.969016667 -0.167289626 -0.024438988 1 0.97171 -0.152268899 -0.01706765 1.25 0.97409 -0.139075651 -0.010939712 1.5 0.976123333 -0.127862697 -0.006795087 1.75 0.977786667 -0.118729759 -0.002919842 2 0.979000001 -0.112089924 -0.001981819 2.25 0.979743333 -0.108031322 -0.001163676 2.5 0.98001 -0.106577018 -0.003491456 2.75 0.979766667 -0.107904033 -0.009723697 |
» 本帖已獲得的紅花（最新10朵）
ckm08114樓2021-07-21 20:06:35
ckm0811
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5樓2021-07-22 19:31:12
獨(dú)孤神宇
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【答案】應(yīng)助回帖
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可以參考一下這個(gè)結(jié)果。 數(shù)據(jù)點(diǎn)太多了，數(shù)據(jù)趨勢(shì)明顯，可以抽取部分?jǐn)?shù)據(jù)擬合。 均方差(RMSE): 8.9424225760802E-18 殘差平方和(SSR): 1.91920611670053E-33 相關(guān)系數(shù)(R): 0.458333333333333 相關(guān)系數(shù)之平方(R^2): 0.210069444444444 修正R平方(Adj. R^2): 0.261904761904762 確定系數(shù)(DC): 0.458333333333333 F統(tǒng)計(jì)(F-Statistic): -5.22814936168938E29 參數(shù) 最佳估算 -------------------- ------------- fac1 3.03402198409604 fac2 0.426767353785268 fac3 -0.162134252603988 fac4 0 fac5 0 fac6 2.21639117580836 fac7 0.00666909053919589 lambv0 -0.0642609952712269 lambv1 -0.122299617461866 lambv2 -0.179059212190809 lambv3 -0.221947016217867 lambv4 -0.260568155058273 lambv5 -0.288634667671384 lambv6 -0.316783379508389 lambv7 -0.323931620009045 lambv8 -0.33038253736283 lambv9 -0.311755103592339 lambv10 -0.262350065039908 lambv11 0 ====== 結(jié)果輸出 ====== 文件: 數(shù)據(jù)文件-1 No t 目標(biāo) p 計(jì)算 p 目標(biāo) lambv 計(jì)算 lambv 1 0.25 -0.046836278 -0.046836278 0 0 2 0.5 -0.035042256 -0.035042256 0 0 3 0.75 -0.024438988 -0.024438988 0 0 4 1 -0.01706765 -0.01706765 0 0 5 1.25 -0.010939712 -0.010939712 0 0 6 1.5 -0.006795087 -0.00679508699999998 0 0 7 1.75 -0.002919842 -0.002919842 0 0 8 2 -0.001981819 -0.00198181899999999 0 0 9 2.25 -0.001163676 -0.001163676 0 0 10 2.5 -0.003491456 -0.00349145600000001 0 0 11 2.75 -0.009723697 -0.00972369699999999 0 0 |
6樓2021-07-22 21:40:44
【答案】應(yīng)助回帖
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嘗試用OpenLu（可從www.forcal.net下載）求解，與大家探討。 使用 1樓 給出的第一種公式。未知中間變量lambv用解方程法求解，但不知這種方法有沒有問題？ 仍類似于 4樓 使用部分?jǐn)?shù)據(jù)擬合，以減少運(yùn)行時(shí)間。 Lu腳本代碼： !!!using["luopt","math"]; //使用命名空間 g(lambv :: fac1,fac2,fac3,fac4,fac5,fac6,fac7,lamb)= ((1.0/3/fac7)*(fac1*((lamb/lambv)^fac2-(lambv/lamb)^(0.5*fac2))+fac3*((lamb/lambv)^fac4-(lambv/lamb)^(0.5*fac4))+fac5*((lamb/lambv)^fac6-(lambv/lamb)^(0.5*fac6))))-lambv; f(t,_lamb,lambv,pp : x : fac1,fac2,fac3,fac4,fac5,fac6,fac7,lamb) = lamb=_lamb, x=lamb, if{pqrt[@g,&x,1e-6]<=0, return(1)}, //連分式法解方程，返回迭代次數(shù)，迭代次數(shù)<=0，求解失敗 lambv=x, 0; //成功返回0 pp(pa,p,lamb,lambv :: fac1,fac2,fac3,fac4,fac5,fac6,fac7) = (pa+fac1*((lamb/lambv)^fac2/lamb-(lambv/lamb)^(fac2*0.5)/lamb)+fac3*((lamb/lambv)^fac4/lamb-(lambv/lamb)^(fac4*0.5)/lamb)+fac5*((lamb/lambv)^fac6/lamb-(lambv/lamb)^(fac6*0.5)/lamb)) - p; 目標(biāo)函數(shù)(_fac1,_fac2,_fac3,_fac4,_fac5,_fac6,_fac7 : i,s,tf : t_A, t_lamb, t_pa, t_p, max, fac1,fac2,fac3,fac4,fac5,fac6,fac7,la)= { fac1=_fac1, fac2=_fac2, fac3=_fac3, fac4=_fac4, fac5=_fac5, fac6=_fac6, fac7=_fac7, //傳遞優(yōu)化變量 la[0]=t_lamb[0,0], //最后一個(gè)參數(shù)50表示gsl_ode函數(shù)在計(jì)算時(shí),最多循環(huán)計(jì)算50次,這樣可以提高速度 tf=gsl_ode[@f, nil, 0.0, t_A, la, 1e-6, 1e-6, gsl_rkf45, 1e-6,50], i=-1, s=0, while{++i<max, s=s+pp[t_pa(i,0),t_p(i,0),t_lamb(i,0),tf(i,1)]^2.0 }, s }; main(: tArray : t_A, t_lamb, t_pa, t_p, max, la)= { tArray=matrix{ //存放實(shí)驗(yàn)數(shù)據(jù)//t,lamb,pa,p "0 0.959926667 -0.218715994 -0.060966222 0.25 0.963063333 -0.200840559 -0.046836278 0.5 0.96612 -0.183553472 -0.035042256 0.75 0.969016667 -0.167289626 -0.024438988 1 0.97171 -0.152268899 -0.01706765 1.25 0.97409 -0.139075651 -0.010939712 1.5 0.976123333 -0.127862697 -0.006795087 1.75 0.977786667 -0.118729759 -0.002919842 2 0.979000001 -0.112089924 -0.001981819 2.25 0.979743333 -0.108031322 -0.001163676 2.5 0.98001 -0.106577018 -0.003491456 2.75 0.979766667 -0.107904033 -0.009723697" }, len[tArray,0,&max], t_A=tArray(all:0), t_lamb=tArray(all:1), t_pa=tArray(all:2), t_p=tArray(all:3), //用len函數(shù)取矩陣的行數(shù)，t_A等取矩陣的列 la=ra1[0], //預(yù)先申請(qǐng)數(shù)組 Opt1[@目標(biāo)函數(shù), optwaysimdeep, optwayconfra] //Opt1函數(shù)全局優(yōu)化 }; 微分方程+解方程，耗時(shí)長(zhǎng)，未多次求解，故結(jié)果不是最優(yōu)的： 1.953313036693719 -2.867510001653266e-002 -0.2767401112856916 -3.629687916321768 -0.2763230915848823 7.260677042953397 -0.3201568717886613 2.502852593689372e-002 |
7樓2021-08-09 08:09:41
【答案】應(yīng)助回帖
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Lu 腳本 繪圖代碼，但不知道如何貼圖？可以看到，第一個(gè)點(diǎn)沒有擬合好。 !!!using["luopt","math","win"]; //使用命名空間 g(lambv :: fac1,fac2,fac3,fac4,fac5,fac6,fac7,lamb)= ((1.0/3/fac7)*(fac1*((lamb/lambv)^fac2-(lambv/lamb)^(0.5*fac2))+fac3*((lamb/lambv)^fac4-(lambv/lamb)^(0.5*fac4))+fac5*((lamb/lambv)^fac6-(lambv/lamb)^(0.5*fac6))))-lambv; f(t,_lamb,lambv,pp : x : fac1,fac2,fac3,fac4,fac5,fac6,fac7,lamb) = lamb=_lamb, x=lamb, if{pqrt[@g,&x,1e-6]<=0, return(1)}, //連分式法解方程，返回迭代次數(shù)，迭代次數(shù)<=0，求解失敗 lambv=x, 0; //成功返回0 pp(pa,lamb,lambv :: fac1,fac2,fac3,fac4,fac5,fac6,fac7) = (pa+fac1*((lamb/lambv)^fac2/lamb-(lambv/lamb)^(fac2*0.5)/lamb)+fac3*((lamb/lambv)^fac4/lamb-(lambv/lamb)^(fac4*0.5)/lamb)+fac5*((lamb/lambv)^fac6/lamb-(lambv/lamb)^(fac6*0.5)/lamb)); set(_fac1,_fac2,_fac3,_fac4,_fac5,_fac6,_fac7 :: fac1,fac2,fac3,fac4,fac5,fac6,fac7)= { fac1=_fac1, fac2=_fac2, fac3=_fac3, fac4=_fac4, fac5=_fac5, fac6=_fac6, fac7=_fac7 //傳遞優(yōu)化變量 }; init(main : tArray, tf, i, k, t_pp,t_lambv : t_A, t_lamb, t_pa, t_p, max)= { tArray=matrix{ //存放實(shí)驗(yàn)數(shù)據(jù)//t,lamb,pa,p "0 0.959926667 -0.218715994 -0.060966222 0.25 0.963063333 -0.200840559 -0.046836278 0.5 0.96612 -0.183553472 -0.035042256 0.75 0.969016667 -0.167289626 -0.024438988 1 0.97171 -0.152268899 -0.01706765 1.25 0.97409 -0.139075651 -0.010939712 1.5 0.976123333 -0.127862697 -0.006795087 1.75 0.977786667 -0.118729759 -0.002919842 2 0.979000001 -0.112089924 -0.001981819 2.25 0.979743333 -0.108031322 -0.001163676 2.5 0.98001 -0.106577018 -0.003491456 2.75 0.979766667 -0.107904033 -0.009723697" }, len[tArray,0,&max], t_A=tArray(all:0), t_lamb=tArray(all:1), t_pa=tArray(all:2), t_p=tArray(all:3), //用len函數(shù)取矩陣的行數(shù)，t_A等取矩陣的列 set[1.953313036693719 , -2.867510001653266e-002 , -0.2767401112856916 , -3.629687916321768 , -0.2763230915848823 , 7.260677042953397 , -0.3201568717886613 ], t_pp=new[real_s,max], t_lambv=new[real_s,max], //最后一個(gè)參數(shù)50表示gsl_ode函數(shù)在計(jì)算時(shí),最多循環(huán)計(jì)算50次,這樣可以提高速度 tf=gsl_ode[@f, nil, 0.0, t_A, ra1(t_lamb[0,0]), 1e-6, 1e-6, gsl_rkf45, 1e-6,50], i=-1, while{++i<max, t_pp=pp[t_pa(i,0),t_lamb(i,0),tf(i,1)], t_lambv=tf(i,1)}, t_A=reshape(t_A), o[t_lambv, t_pp], cwAttach[typeSplit], cwResizePlots(1,2,2), //左二右二分裂 k=cwAddCurve{t_A, t_p.reshape(), max, 0}, //給0子圖添加曲線 cwSetScatter(k,0), //設(shè)置繪制點(diǎn) cwSetDataLineSize(5, k, 0), //設(shè)置點(diǎn)的大小 cwAddCurve{t_A, t_pp, max, 0}, //給0子圖添加曲線 cwAddCurve{t_A, t_lamb.reshape(), max, 1}, //給1子圖添加曲線 cwAddCurve{t_A, t_pa.reshape(), max, 2}, //給2子圖添加曲線 cwAddCurve{t_A, t_lambv, max, 3} //給3子圖添加曲線 }; ChartWnd[@init]; |
8樓2021-08-09 08:16:24
9樓2021-08-09 15:37:17
【答案】應(yīng)助回帖
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使用 3樓、4樓 的公式進(jìn)行求解。 有兩個(gè)難點(diǎn)： 1、微分方程求解時(shí)要傳遞中間變量lamb, pa。 2、lambv為未知中間變量，需要求解。 第一個(gè)難點(diǎn)對(duì)Lu腳本來說不是問題，gsl支持的Lu擴(kuò)展數(shù)學(xué)庫中求解微分方程的函數(shù)gsl_ode中提供了該功能。 進(jìn)一步討論：微分方程求解傳遞中間變量時(shí)，按時(shí)間t的改變量進(jìn)行插值，可提高求解精度。例如，進(jìn)行線性插值：lamb=lamb0+(lamb1-lamb0)*[(t-t0)/(t1-t0)], pa=pa0+(pa1-pa0)*[(t-t0)/(t1-t0)]。 第二個(gè)難點(diǎn)若使用6樓的辦法，當(dāng)數(shù)據(jù)量大時(shí)似乎難以實(shí)現(xiàn)。故在這里使用冪級(jí)數(shù)逼近lambv，進(jìn)行擬合的方法，需增加k0,k1,k2,k3四個(gè)擬合參數(shù)；當(dāng)然擬合參數(shù)多時(shí)精度高，但耗時(shí)長(zhǎng)。 仍使用部分?jǐn)?shù)據(jù)擬合，以減少時(shí)間。 Lu腳本代碼： !!!using["luopt","math"]; //使用命名空間 f(t,p,dp, i : lamb,pa, A,w,lambdif,lambvdif,lambv: t_A, t_lamb, t_pa, fac1,fac2,fac3,fac4,fac5,fac6,fac7,k0,k1,k2,k3,k4) = { lamb=t_lamb+(t_lamb[i+1]-t_lamb)*[(t-t_A)/(t_A[i+1]-t_A)], pa=t_pa+(t_pa[i+1]-t_pa)*[(t-t_A)/(t_A[i+1]-t_A)], //線性插值計(jì)算lamb,pa lambv=k0+k1*lamb+k2*lamb*lamb+k3*lamb^3+k4*lamb^4, //lambv=f(lamb,k0,k1,k2,k3,k4)，使用冪級(jí)數(shù)逼近 A=0.02,w=2*pi*0.1, lambdif=A*w*cos(w*t), lambvdif=((1.0/3/fac7)*(fac1*((lamb/lambv)^fac2-(lambv/lamb)^(0.5*fac2))+fac3*((lamb/lambv)^fac4-(lambv/lamb)^(0.5*fac4))+fac5*((lamb/lambv)^fac6-(lambv/lamb)^(0.5*fac6)))), dp=pa+fac1*((fac2-1)*lamb^(fac2-2)*lambv^(-fac2)*lambdif-fac2*lamb^(fac2-1)*lambv^(-fac2-1)*lambvdif +(0.5*fac2+1)*lamb^(-0.5*fac2-2)*lambv^(0.5*fac2)*lambdif-0.5*fac2*lamb^(-0.5*fac2-1)*lambv^(0.5*fac2-1)*lambvdif) +fac3*((fac4-1)*lamb^(fac4-2)*lambv^(-fac4)*lambdif-fac4*lamb^(fac4-1)*lambv^(-fac4-1)*lambvdif+(0.5*fac4+1)*lamb^(-0.5*fac4-2)*lambv^(0.5*fac4)*lambdif -0.5*fac4*lamb^(-0.5*fac4-1)*lambv^(0.5*fac4-1)*lambvdif)+fac5*((fac6-1)*lamb^(fac6-2)*lambv^(-fac6)*lambdif -fac6*lamb^(fac6-1)*lambv^(-fac6-1)*lambvdif+(0.5*fac6+1)*lamb^(-0.5*fac6-2)*lambv^(0.5*fac6)*lambdif -0.5*fac6*lamb^(-0.5*fac6-1)*lambv^(0.5*fac6-1)*lambvdif), 0 //必須返回0 }; 目標(biāo)函數(shù)(_fac1,_fac2,_fac3,_fac4,_fac5,_fac6,_fac7,_k0,_k1,_k2,_k3,_k4 : i,s,tf: t_A, t_p, fac1,fac2,fac3,fac4,fac5,fac6,fac7,k0,k1,k2,k3,k4)= { fac1=_fac1, fac2=_fac2, fac3=_fac3, fac4=_fac4, fac5=_fac5, fac6=_fac6, fac7=_fac7, k0=_k0, k1=_k1, k2=_k2, k3=_k3, k4=_k4, //傳遞優(yōu)化變量 //最后一個(gè)參數(shù)50表示gsl_ode函數(shù)在計(jì)算時(shí),最多循環(huán)計(jì)算50次,這樣可以提高速度 tf=gsl_ode[@f, nil, nil, t_A, ra1(-0.060966222), 1e-6, 1e-6, gsl_rkf45, 1e-6,50], sum{[tf(all:1).reshape()-t_p].^2.0} //代碼矢量化加速，特別適合大數(shù)據(jù)量 }; main(: tArray : t_A, t_lamb, t_pa, t_p)= { tArray=matrix{ //存放實(shí)驗(yàn)數(shù)據(jù)//t,lamb,pa,p "0 0.959926667 -0.218715994 -0.060966222 0.25 0.963063333 -0.200840559 -0.046836278 0.5 0.96612 -0.183553472 -0.035042256 0.75 0.969016667 -0.167289626 -0.024438988 1 0.97171 -0.152268899 -0.01706765 1.25 0.97409 -0.139075651 -0.010939712 1.5 0.976123333 -0.127862697 -0.006795087 1.75 0.977786667 -0.118729759 -0.002919842 2 0.979000001 -0.112089924 -0.001981819 2.25 0.979743333 -0.108031322 -0.001163676 2.5 0.98001 -0.106577018 -0.003491456 2.75 0.979766667 -0.107904033 -0.009723697" }, t_A=tArray(all:0).reshape(), t_lamb=tArray(all:1).reshape(), t_pa=tArray(all:2).reshape(), t_p=tArray(all:3).reshape(), //t_A等取矩陣的列，并轉(zhuǎn)為一維數(shù)組 Opt1[@目標(biāo)函數(shù), optwaysimdeep, optwayconfra] //Opt1函數(shù)全局優(yōu)化 }; 結(jié)果（fac1～fac7，k0,k1,k2,k3,k4，最小值）： 17.38947868627771 0.3416680168065553 -31901.02726305072 1.871542771429994e-004 2.297270203567084e-003 8.207606707403809 -41.52220237484659 -1.705988163594953 -0.3001058349255158 2.1410790976942 4.419612473682794 -4.029380465220802 2.405714024195563e-006 繪圖代碼： !!!using["luopt","math","win"]; //使用命名空間 f(t,p,dp, i : lamb,pa, A,w,lambdif,lambvdif,lambv: t_A, t_lamb, t_pa, fac1,fac2,fac3,fac4,fac5,fac6,fac7,k0,k1,k2,k3,k4) = { lamb=t_lamb+(t_lamb[i+1]-t_lamb)*[(t-t_A)/(t_A[i+1]-t_A)], pa=t_pa+(t_pa[i+1]-t_pa)*[(t-t_A)/(t_A[i+1]-t_A)], //線性插值計(jì)算lamb,pa lambv=k0+k1*lamb+k2*lamb*lamb+k3*lamb^3+k4*lamb^4, //lambv=f(lamb,k0,k1,k2,k3,k4)，使用冪級(jí)數(shù)逼近 A=0.02,w=2*pi*0.1, lambdif=A*w*cos(w*t), lambvdif=((1.0/3/fac7)*(fac1*((lamb/lambv)^fac2-(lambv/lamb)^(0.5*fac2))+fac3*((lamb/lambv)^fac4-(lambv/lamb)^(0.5*fac4))+fac5*((lamb/lambv)^fac6-(lambv/lamb)^(0.5*fac6)))), dp=pa+fac1*((fac2-1)*lamb^(fac2-2)*lambv^(-fac2)*lambdif-fac2*lamb^(fac2-1)*lambv^(-fac2-1)*lambvdif +(0.5*fac2+1)*lamb^(-0.5*fac2-2)*lambv^(0.5*fac2)*lambdif-0.5*fac2*lamb^(-0.5*fac2-1)*lambv^(0.5*fac2-1)*lambvdif) +fac3*((fac4-1)*lamb^(fac4-2)*lambv^(-fac4)*lambdif-fac4*lamb^(fac4-1)*lambv^(-fac4-1)*lambvdif+(0.5*fac4+1)*lamb^(-0.5*fac4-2)*lambv^(0.5*fac4)*lambdif -0.5*fac4*lamb^(-0.5*fac4-1)*lambv^(0.5*fac4-1)*lambvdif)+fac5*((fac6-1)*lamb^(fac6-2)*lambv^(-fac6)*lambdif -fac6*lamb^(fac6-1)*lambv^(-fac6-1)*lambvdif+(0.5*fac6+1)*lamb^(-0.5*fac6-2)*lambv^(0.5*fac6)*lambdif -0.5*fac6*lamb^(-0.5*fac6-1)*lambv^(0.5*fac6-1)*lambvdif), 0 //必須返回0 }; set(_fac1,_fac2,_fac3,_fac4,_fac5,_fac6,_fac7,_k0,_k1,_k2,_k3,_k4 :: fac1,fac2,fac3,fac4,fac5,fac6,fac7,k0,k1,k2,k3,k4)= { fac1=_fac1, fac2=_fac2, fac3=_fac3, fac4=_fac4, fac5=_fac5, fac6=_fac6, fac7=_fac7, k0=_k0, k1=_k1, k2=_k2, k3=_k3, k4=_k4 //傳遞優(yōu)化變量 }; init(init: tArray,t_lambv,i,tf,k,lamb : t_A, t_lamb, t_pa, t_p, max, fac1,fac2,fac3,fac4,fac5,fac6,fac7,k0,k1,k2,k3,k4)= { tArray=matrix{ //存放實(shí)驗(yàn)數(shù)據(jù)//t,lamb,pa,p "0 0.959926667 -0.218715994 -0.060966222 ... ... 數(shù)據(jù)省略 2.75 0.979766667 -0.107904033 -0.009723697" }, len[tArray,0,&max], t_A=tArray(all:0).reshape(), t_lamb=tArray(all:1).reshape(), t_pa=tArray(all:2).reshape(), t_p=tArray(all:3).reshape(), set[17.38947868627771, 0.3416680168065553, -31901.02726305072, 1.871542771429994e-004, 2.297270203567084e-003, 8.207606707403809, -41.52220237484659, -1.705988163594953, -0.3001058349255158, 2.1410790976942, 4.419612473682794, -4.029380465220802 ], t_lambv=new[real_s,max], i=-1, while{++i<max, lamb=t_lamb, t_lambv=k0+k1*lamb+k2*lamb*lamb+k3*lamb^3+k4*lamb^4}, tf=gsl_ode[@f, nil, nil, t_A, ra1(-0.060966222), 1e-6, 1e-6, gsl_rkf45, 1e-6,50], cwAttach[typeSplit], cwResizePlots(1,2,2), //左二右二分裂 k=cwAddCurve{t_A, t_p, max, 0}, //給0子圖添加曲線 cwSetScatter(k,0), //設(shè)置繪制點(diǎn) cwSetDataLineSize(5, k, 0), //設(shè)置點(diǎn)的大小 cwAddCurve{t_A, tf(all:1).reshape(), max, 0}, //給0子圖添加曲線 cwAddCurve{t_A, t_lamb, max, 1}, //給1子圖添加曲線 cwAddCurve{t_A, t_pa, max, 2}, //給2子圖添加曲線 cwAddCurve{t_A, t_lambv, max, 3} //給3子圖添加曲線 }; ChartWnd[@init]; 圖形： https://blog.csdn.net/wlfc/article/details/119607664 |
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[考研] 268求調(diào)劑 +10 | 簡(jiǎn)單點(diǎn)0 2026-03-02 | 14/700 |
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[考研] 267求調(diào)劑 +6 | 釣魚佬as 2026-03-02 | 6/300 |
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[考研] 278求調(diào)劑 +3 | 滿天星11_22 2026-03-02 | 3/150 |
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[考研] 化學(xué)0703求調(diào)劑 學(xué)碩 理/工科均可 總分279 +3 | 1一11 2026-03-03 | 5/250 |
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[考研] 26考研報(bào)考西工大材料308分求調(diào)劑 +4 | weizhong123 2026-03-01 | 5/250 |
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[考研] 307求調(diào)劑 +6 | wyyyqx 2026-03-01 | 6/300 |
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[考研] 0856材料求調(diào)劑 +12 | hyf hyf hyf 2026-02-28 | 13/650 |
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[考研] 306分材料調(diào)劑 +5 | chuanzhu川燭 2026-03-01 | 6/300 |
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[考研] 275求調(diào)劑 +7 | 明遠(yuǎn)求學(xué) 2026-03-01 | 7/350 |
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[考研] 265分求調(diào)劑不調(diào)專業(yè)和學(xué)校有行學(xué)上就 +6 | 禮堂丁真258 2026-02-28 | 9/450 |
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[考研] 272求調(diào)劑 +6 | 田智友 2026-02-28 | 6/300 |
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[考研] 化工299分求調(diào)劑 一志愿985落榜 +5 | 嘻嘻(*^ω^*) 2026-03-01 | 5/250 |
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[考研]
 尋找調(diào)劑
+4
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LYidhsjabdj 2026-02-28 | 4/200 |
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