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4Â¥2019-09-06 11:49:14
feixiaolin
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·Ö¶ÎÄâºÏ£»ÒýÈë·ûºÅº¯Êý£¬¿ÉÒÔ½â¾ö¡£ ------------- ½¨Ò麯Êý y = (p1+p3*x)/(1+p2*x+p4*x^2)*sgn(136-x)+ ( p5+p6*x+p7*x^0.5+p8/Ln(x)+p9/x)*sgn(x-135) sgn(x)Ϊ·ûºÅº¯Êý if x>=0 sgn(x)=1 if x=0 sgn(x)=0 if x<0 sgn(x)=-1 |
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5Â¥2019-09-06 22:41:54
6Â¥2019-09-07 11:59:28
7Â¥2019-09-07 12:00:21
dreampursuer
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8Â¥2019-09-28 19:16:47
dingd
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ÔÚ¶¥µãx=135´¦·Ö¶Î x<=135, y=1/(p1+p2*x+p3/x)+p4 x>135, y=b1+b2/(1+((x-b3)/p4)^2)+b5*x+b6/x Root of Mean Square Error (RMSE): 0.000818941360502226 Sum of Squared Residual: 0.000268265980776495 Correlation Coef. (R): 0.998950630413412 R-Square: 0.997902362003353 Adjusted R-Square: 0.997891794557526 Determination Coef. (DC): 0.997902361998357 Chi-Square: 0.0105503282182204 F-Statistic: 23251.2148161944 Parameter Best Estimate ---------- ------------- p1 170.500356458424 p2 -2.30956003827742 p3 20335.0075099944 p4 0.0265346950026455 b1 -0.00803839140152831 b2 7.76509612773163 b3 136.230211854375 b5 9.87851102352787E-6 b6 1.96446488332825 |
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