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[求助]
1stopt擬合方程系數(shù),始終算不出結(jié)果,希望有大神幫忙算一遍或者看看有沒(méi)有問(wèn)題 已有1人參與
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Parameters B[0,0.00000001],C[0,0.02],D[0,1],k[0,1]; constant wc=0.4; constant S=350; constant pc=3.15,pw=1,r=1; CONSTANT r0=3/S/10/pc; Variable t,a,a1,b; Function a1=3*b*pw*((wc/(1+wc)-0.4*a/(1+wc))/(1/(1+wc)))^r/0.4/r0/pc/((1/(B/a^1.5+C*a^3)-r0/(D*ln(1/a)))+r0/(D*ln(1/a))*(1-a)^(-1/3)+1/k*(1-a)^(-2/3)); data; time a a1 b 2.22200 0.02354 0.00423 1 2.96433 0.02718 0.00571 1 3.64655 0.03169 0.00766 1 4.24017 0.03688 0.00997 1 4.91868 0.04462 0.01293 1 5.98748 0.06109 0.01784 1 7.30983 0.08811 0.02270 1 9.00767 0.12961 0.02549 1 10.32194 0.16311 0.02523 0.983823726 11.39535 0.18973 0.02430 0.963170866 12.46181 0.21506 0.02326 0.944167732 13.59083 0.24120 0.02291 0.92594501 14.63194 0.26423 0.02119 0.910733473 16.15073 0.29432 0.01849 0.891850486 17.33270 0.31509 0.01667 0.879008325 18.91573 0.33992 0.01476 0.863137203 20.16080 0.35753 0.01356 0.851951442 21.39448 0.37363 0.01256 0.842328242 22.37030 0.38553 0.01185 0.835057445 23.06710 0.39363 0.01138 0.830070292 23.62635 0.39990 0.01103 0.826191374 24.01731 0.40417 0.01079 0.823490749 24.49386 0.40925 0.01052 0.820555243 24.96176 0.41410 0.01025 0.81756759 25.50164 0.41956 0.00994 0.814313168 25.97504 0.42421 0.00969 0.811513533 26.53211 0.42952 0.00940 0.80837147 27.39851 0.43748 0.00896 0.803816902 28.13384 0.44394 0.00861 0.800133998 37.29421 0.50917 0.00616 0.761801069 46.82561 0.56032 0.00459 0.733040157 59.37877 0.60812 0.00311 0.707264692 73.41124 0.64271 0.00189 0.689310005 88.45445 0.66483 0.00113 0.678050343 100.84466 0.67647 0.00077 0.67216066 168.23129 0.69760 0.00002 0.661701517 |
鐵桿木蟲 (職業(yè)作家)
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