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fss706

½ð³æ (ÕýʽдÊÖ)

[ÇóÖú] Çó½âÀ­²¼À­Ë¹Äæ±ä»» ÒÑÓÐ1È˲ÎÓë

¼ÆË㺯ÊýF(s)=1/(s+1)-1/(s-1)µÄÀ­ÆÕÀ­Ë¹Äæ±ä»»¡£
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feixiaolin

ÈÙÓþ°æÖ÷ (ÎÄ̳¾«Ó¢)

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F(s)=1/(s+1)-1/(s-1)
f(t)=exp(-t)*u(t)-exp(t)*u(t)     Re(s)>1
f(t)=exp(-t)*u(t)+exp(t)*u(-t)   -1<Re(s)<1
f(t)=-exp(-t)*u(-t)+exp(t)*u(-t)   Re(s)<-1

[ Last edited by feixiaolin on 2014-3-1 at 16:24 ]
2Â¥2014-02-28 22:30:14
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peterflyer

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peterflyer


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fss706(feixiaolin´ú·¢): ½ð±Ò+12, Òò¹ûÏìÓ¦½â 2014-03-01 16:25:07
ÔËÓÃÀ­Ê½±ä»»µÄÎ»ÒÆ¹«Ê½£ºL[e^(a*t)*f(t)]=F(s-a)ºÍL[a/s]=a
¶øF(s)=1/(s+1)-1/(s-1)=1/[s-(-1)]-1/(s-1)
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L^(-1)[F(s)]=e^(-t)-e^t
3Â¥2014-02-28 23:08:49
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