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liqingzh

金虫 (正式写手)

[求助] 哪位大侠能帮我拟合找到 T,r, wp和C的值,非常感谢! 已有1人参与

已知曲线上的数据w和y:
w=
Columns 1 through 8

  700.2091  700.7143  701.2195  701.7247  702.2300  702.7352  703.2404  703.7457

  Columns 9 through 16

  704.2509  704.7561  705.2613  705.7665  706.2718  706.7770  707.2822  707.7875

  Columns 17 through 24

  708.2927  708.7979  709.3032  709.8084  710.3136  710.8188  711.3240  711.8293

  Columns 25 through 32

  712.3345  712.8397  713.3450  713.8502  714.3554  714.8607  715.3658  715.8711

  Columns 33 through 40

  716.3763  716.8815  717.3868  717.8920  718.3972  718.9025  719.4076  719.9129

  Columns 41 through 48

  720.4181  720.9233  721.4286  721.9338  722.4390  722.9443  723.4495  723.9547

  Columns 49 through 56

  724.4599  724.9651  725.4704  725.9756  726.4808  726.9861  727.4913  727.9965

  Columns 57 through 64

  728.5018  729.0070  729.5122  730.0174  730.5226  731.0279  731.5331  732.0383

  Columns 65 through 72

  732.5436  733.0488  733.5540  734.0592  734.5644  735.0697  735.5749  736.0801

  Columns 73 through 80

  736.5854  737.0906  737.5958  738.1011  738.6063  739.1115  739.6167  740.1219

  Columns 81 through 88

  740.6272  741.1324  741.6376  742.1429  742.6481  743.1533  743.6585  744.1638

  Columns 89 through 96

  744.6690  745.1742  745.6794  746.1847  746.6899  747.1951  747.7004  748.2056

  Columns 97 through 104

  748.7108  749.2160  749.7213  750.2265  750.7317  751.2369  751.7422  752.2474

  Columns 105 through 112

  752.7526  753.2578  753.7631  754.2683  754.7735  755.2787  755.7840  756.2892

  Columns 113 through 120

  756.7944  757.2996  757.8049  758.3101  758.8153  759.3206  759.8258  760.3310

  Columns 121 through 128

  760.8362  761.3415  761.8467  762.3519  762.8571  763.3624  763.8676  764.3728

  Columns 129 through 136

  764.8781  765.3833  765.8885  766.3937  766.8989  767.4042  767.9094  768.4146

  Columns 137 through 144

  768.9199  769.4251  769.9303  770.4356  770.9408  771.4460  771.9512  772.4564

  Columns 145 through 152

  772.9617  773.4669  773.9721  774.4774  774.9826  775.4878  775.9930  776.4982

  Columns 153 through 160

  777.0035  777.5087  778.0139  778.5192  779.0244  779.5296  780.0349  780.5401

  Columns 161 through 168

  781.0453  781.5505  782.0557  782.5610  783.0662  783.5714  784.0767  784.5819

  Columns 169 through 176

  785.0871  785.5924  786.0975  786.6028  787.1080  787.6132  788.1185  788.6237

  Columns 177 through 184

  789.1289  789.6342  790.1393  790.6446  791.1498  791.6550  792.1603  792.6655

  Columns 185 through 192

  793.1707  793.6760  794.1812  794.6864  795.1916  795.6968  796.2021  796.7073

  Columns 193 through 199

  797.2125  797.7178  798.2230  798.7282  799.2335  799.7387  800.2439;

y=
Columns 1 through 8

    0.8755    0.8792    0.8773    0.8846    0.8740    0.8721    0.8744    0.8697

  Columns 9 through 16

    0.8650    0.8730    0.8606    0.8648    0.8639    0.8512    0.8436    0.8626

  Columns 17 through 24

    0.8787    0.8768    0.8710    0.8735    0.8856    0.8725    0.8730    0.8743

  Columns 25 through 32

    0.8651    0.8499    0.8383    0.8466    0.8711    0.8549    0.8422    0.8573

  Columns 33 through 40

    0.8632    0.8665    0.8645    0.8517    0.8468    0.8506    0.8378    0.8567

  Columns 41 through 48

    0.8657    0.8665    0.8644    0.8645    0.8509    0.8759    0.8548    0.8463

  Columns 49 through 56

    0.8530    0.8608    0.9095    0.9064    0.8916    0.8813    0.8892    0.9129

  Columns 57 through 64

    0.8819    0.9048    0.9047    0.9082    0.9240    0.9348    0.9627    0.9587

  Columns 65 through 72

    0.9704    0.9787    0.9709    0.9610    0.9874    0.9928    0.9743    0.9804

  Columns 73 through 80

    1.0031    0.9411    0.9704    0.9586    0.9401    0.9264    0.9176    0.9092

  Columns 81 through 88

    0.8945    0.8755    0.8626    0.8537    0.8444    0.8374    0.8343    0.8225

  Columns 89 through 96

    0.8147    0.8113    0.8063    0.7923    0.7873    0.7717    0.7622    0.7599

  Columns 97 through 104

    0.7576    0.7498    0.7627    0.7442    0.7474    0.7588    0.7433    0.7123

  Columns 105 through 112

    0.7172    0.7231    0.7221    0.7195    0.7168    0.6867    0.6944    0.7083

  Columns 113 through 120

    0.7099    0.7003    0.6943    0.7138    0.7105    0.6987    0.6920    0.6918

  Columns 121 through 128

    0.6916    0.6811    0.6818    0.6859    0.6695    0.6622    0.6854    0.6900

  Columns 129 through 136

    0.6678    0.6574    0.6623    0.6659    0.6616    0.6753    0.6725    0.6578

  Columns 137 through 144

    0.6649    0.6793    0.6737    0.6357    0.6472    0.6480    0.6538    0.6578

  Columns 145 through 152

    0.6579    0.6637    0.6514    0.6635    0.6723    0.6640    0.6482    0.6516

  Columns 153 through 160

    0.6699    0.6684    0.6509    0.6486    0.6591    0.6583    0.6724    0.6745

  Columns 161 through 168

    0.6642    0.6578    0.6542    0.6464    0.6461    0.6532    0.6583    0.6656

  Columns 169 through 176

    0.6632    0.6500    0.6590    0.6522    0.6628    0.6450    0.6313    0.6422

  Columns 177 through 184

    0.6450    0.6474    0.6470    0.6577    0.6563    0.6417    0.6382    0.6456

  Columns 185 through 192

    0.6363    0.6493    0.6503    0.6377    0.6333    0.6438    0.6512    0.6382

  Columns 193 through 199

    0.6325    0.6406    0.6508    0.6420    0.6141    0.6253    0.6380;

要拟合的函数:
y=(((256136*T*w)/((w^2 - 284089)^2 + T^2*w^2) + (r*wp^2)/(w*(r^2 + w^2)))*((80706559921*(wp^2*(256136*r - T*(2*w^2 - wp^2)) + T*w^2*(r^2 + w^2))*C^2)/(256136*r*wp^2*((w^2 - 284089)^2 + T^2*w^2) + 65605650496*T*w^2*(r^2 + w^2)) - (568178*(T*w^2*(r^2 + w^2 - wp^2) + r*wp^2*(w^2 - 284089))*C)/(r*wp^2*((w^2 - 284089)^2 + T^2*w^2) + 256136*T*w^2*(r^2 + w^2)) + 1))/((107*((256136*T*w)/((w^2 - 284089)^2 + T^2*w^2) + (r*wp^2)/(w*(r^2 + w^2)))^2)/20 + (107*((256136*w^2 - 72765420104)/((w^2 - 284089)^2 + T^2*w^2) + wp^2/(r^2 + w^2) - 1)^2)/20);

通过拟合, 求常数T,r, wp, C。
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dingd

铁杆木虫 (职业作家)

【答案】应助回帖

感谢参与,应助指数 +1
自己用1stOpt先试试吧,很简单的。
2楼2016-05-03 21:29:51
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liqingzh

金虫 (正式写手)

引用回帖:
2楼: Originally posted by dingd at 2016-05-03 21:29:51
自己用1stOpt先试试吧,很简单的。

谢谢提点。
3楼2016-05-04 08:15:34
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liqingzh

金虫 (正式写手)

拟合误差太大了,怎么解决呢?谢谢!
4楼2016-05-04 15:30:33
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