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ydl359木蟲 (小有名氣)
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[求助]
復(fù)數(shù)擬合,非常感謝~
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Title "復(fù)數(shù)擬合"; ComplexStr=i; Parameter a,b,c; Variable w,z[realPart],z[imagPart]; Function z=Sqrt[a*b/(1 + i*b*c*w)]*Coth[Sqrt[a/b*(1 + i*b*c*w)]]; Data; 628318.52 81.94 4.901 499091.1408 81.6 3.93 396442.1849 81.49 3.274 314905.2209 81.25 2.968 250138.1082 81.7 2.907 198691.7619 81.68 2.617 157826.4765 81.61 2.434 125366.0265 81.77 2.3 99581.77448 81.85 2.316 79100.61517 82.06 2.448 62831.852 82.19 2.703 49909.1141 82.53 2.986 39644.21846 82.57 3.355 31490.52211 82.83 3.87 25013.81085 83.01 4.534 19869.17619 83.23 5.396 15782.64764 83.43 6.497 12536.60262 83.74 7.877 9958.177435 84.22 9.615 7910.061504 84.5 11.8 6283.1852 84.82 14.52 4990.911379 85.42 17.9 3964.421821 86.22 22.09 3149.052186 87 27.27 2501.381079 88.34 33.64 1986.917644 89.85 41.43 1578.264745 92.21 50.93 1253.660255 95.28 62.46 995.8177498 99.17 76.35 791.0061441 104.5 93.02 628.31852 111.6 113.2 499.091119 120.4 136.9 396.4421569 131.7 165.1 314.9051997 146.5 198.6 250.1381267 165.5 237.2 198.6917833 189.7 282.4 157.8264494 220.5 334.2 125.3660067 259.2 391.6 99.58176241 275 456.3 79.10058928 333.8 527.2 62.831852 404.7 602.6 49.90909934 486.2 683.6 39.64419684 581 769.8 31.49050741 691.7 856.3 25.0138001 812.5 951.8 19.86919089 948.7 1049 15.78267007 1111 1157 12.5365881 1277 1267 9.958157392 1472 1378 7.910090344 1644 1513 6.283248032 1868 1614 4.9909225 2077 1738 3.964438534 2321 1870 3.14906959 2588 2006 2.50139886 2874 2148 1.986931656 3162 2295 1.57827329 3457 2440 1.253683943 3750 2601 0.995822022 4048 2794 0.790990185 4330 3027 0.62831852 4605 3338 |

鐵桿木蟲 (職業(yè)作家)
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實(shí)部效果好,虛部差;還有次數(shù)似乎過擬合,不唯一,有無其它約束條件? 均方差(RMSE):791.63077289103 殘差平方和(SSE):76454872.231742 相關(guān)系數(shù)(R): 0.79506177202224 相關(guān)系數(shù)之平方(R^2): 0.632123221331145 確定系數(shù)(DC): 0.632123160906227 F統(tǒng)計(jì)(F-Statistic): 7530.59253969622 參數(shù) 最佳估算 -------------------- ------------- a -10035.0543309409 b 16137.6822054854 c 0.000503434209464679 |
鐵桿木蟲 (職業(yè)作家)
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