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[½»Á÷] ¡¾ÇóÖú¡¿ÇóÖú:×îС¶þ³Ë·¨ÇúÏßÄâºÏ²ÎÊý ÒÑÓÐ4È˲ÎÓë

Çë¸ßÊÖ°ïæ±à¸ö³ÌÐò£¬Çó³ö²ÎÊýk£¬·Ç³£¸Ðл£¡£¡£¡

·½³Ì£ºy=y0+(ylimt-y0)/(2*c0)*(x+1/k+c0-((x+c0+1/k)^2-4*c0*x)^0.5)

ÆäÖÐy0=0.723;   ylimt=0.330;   c0=0.00002


xdata=[0.00005 0.00015 0.0002 0.00025 0.0003 0.00035 0.00045 0.00055 0.0006 0.00075 0.00085 0.00095 0.001 0.00115 0.00125 0.00145 0.00155 0.00175 0.00205 0.00245]

ydata=[0.706 0.665 0.652 0.624 0.599 0.574 0.545 0.526 0.492 0.472 0.450 0.434 0.426 0.402 0.387 0.369 0.364 0.345 0.338 0.330]

[ Last edited by Ìì±ß5328 on 2010-4-3 at 17:35 ]
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wangen994(½ð±Ò+1):»î¶¯ÆÚ¼ä¶îÍâ½±Àø 2010-04-09 18:51
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Ìì±ß5328

гæ (СÓÐÃûÆø)

jjdg:Çë¼ÇµÃÉý¼¶ÄãµÄÂÛ̳¼¶±ð 2010-04-10 00:45
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3Â¥2010-04-09 20:35:39
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he866837

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4Â¥2010-04-09 20:45:54
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Ìì±ß5328

гæ (СÓÐÃûÆø)

ÎÒÒÔǰ´ÓûÓнӴ¥¹ýÕâ¸öÈí¼þ£¬²»ÖªµÀ±à³Ì¡£ÎÒ±àµÄ³ÌÐò£¬Èí¼þÌáʾ´íÎó¡£
5Â¥2010-04-10 08:22:19
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sgyin

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

¡ï ¡ï ¡ï ¡ï
jjdg(½ð±Ò+2):ÐÁ¿àÁË 2010-04-11 03:21
wangen994(½ð±Ò+2):»î¶¯ÆÚ¼ä¶îÍâ½±Àø 2010-04-11 20:19
ff=inline('0.723+(0.330-0.723)./(2.*0.00002).*(x+1./k(1)+0.00002-((x+0.00002+1./k(1)).^2-4.*0.00002.*x).^0.5)','k','x')

[xx,res]=lsqcurvefit(ff,[1e3],xdata,ydata);


ÕâÊǹ̶¨y0=0.723;   ylimt=0.330;   c0=0.00002 µÄ½á¹û£¡ÄâºÏÖ»ÄÜÕâÑùÁË£¬Â¥Ö÷°ÑÕâЩ²ÎÊý·Å¿ªÊÔÊÔ

[ Last edited by sgyin on 2010-4-10 at 23:49 ]
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6Â¥2010-04-10 23:45:48
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sgyin

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

ff=inline('k(2)+(k(3)-k(2))./(2.*0.00002).*(x+1./k(1)+0.00002-((x+0.00002+1./k(1)).^2-4.*0.00002.*x).^0.5)','k','x')
[xx,res]=lsqcurvefit(ff,[1e3,1,1],xdata,ydata);
fplot(@(x)ff(xx,x),[0,0.003],'r'),hold on,plot(xdata,ydata,'o')

ÕâÊÇÄâºÏ½á¹ûk= [1295.69223047089         0.756467370036168         0.171649191261954]
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7Â¥2010-04-10 23:54:51
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sgyin

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

¡ï ¡ï ¡ï ¡ï ¡ï
Ìì±ß5328(½ð±Ò+50):·Ç³£¸ÐлÄú 2010-04-11 07:42
wangen994(½ð±Ò+5):»î¶¯ÆÚ¼ä¶îÍâ½±Àø 2010-04-11 10:52
ff=inline('k(2)+(k(3)-k(2))./(2.*k(4)).*(x+1./k(1)+k(4)-((x+k(4)+1./k(1)).^2-4.*k(4).*x).^0.5)','k','x')
[xx,res]=lsqcurvefit(ff,[1e3,1,1,0.0001],xdata,ydata);
fplot(@(x)ff(xx,x),[0,0.003],'r'),hold on,plot(xdata,ydata,'o')

k= [  3599.30404451002          0.73350054683102         0.263275701253758      0.000684697129278193]
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8Â¥2010-04-10 23:59:33
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Ìì±ß5328

гæ (СÓÐÃûÆø)

ÎÒÏëÇë½ÌÄú£¬ÎªÊ²Ã´ÎÒÊäÈë×îºóÄÇÒ»Ðкó£¬Èí¼þÌáʾ´íÎóÄØ£¿
9Â¥2010-04-11 07:58:56
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sgyin

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

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Сľ³æ(½ð±Ò+0.5):¸ø¸öºì°ü£¬Ð»Ð»»ØÌû½»Á÷
wangen994(½ð±Ò+1):»î¶¯ÆÚ¼ä¶îÍâ½±Àø 2010-04-11 20:20
ÏÈÒª¸ø³öxdata, ydataµÄÖµ
ÒýÓûØÌû:
Originally posted by Ìì±ß5328 at 2010-04-11 07:58:56:
ÎÒÏëÇë½ÌÄú£¬ÎªÊ²Ã´ÎÒÊäÈë×îºóÄÇÒ»Ðкó£¬Èí¼þÌáʾ´íÎóÄØ£¿

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10Â¥2010-04-11 12:13:16
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