matlab函数计算syms f o s z k D t m q T x;p=f-o-(s-o)(1-erf(0.5

来源：学生作业帮编辑：搜狗做题网作业帮分类：综合作业时间：2024/05/01 06:50:36

matlab函数计算
syms f o s z k D t m q T x;
p=f-o-(s-o)*(1-erf(0.5*z/(k*D*(t^m)*exp(q*(1/T-1/273))*x.^(1-m)/(1.78*(1-m)))^0.5));
pp=subs(p,{f,o,s,z,k,D,t,m,q,T},{0.1,0.02,0.45,25,20,143,0.0767,0.7,6100,293});
solve(pp)
电脑太慢了,算了好久没算出来,不知道是不是我的未知量在误差函数里面,所以不好求.有没有好心人帮我算出来一下,还有,有办法简化吗?

不慢啊,挺快的,0.4049秒就行

>> tic
syms f o s z k D t m q T x
p=f-o-(s-o)*(1-erf(0.5*z/(k*D*(t^m)*exp(q*(1/T-1/273))*x^(1-m)/(1.78*(1-m)))^0.5));
pp=subs(p,{f,o,s,z,k,D,t,m,q,T},{0.1,0.02,0.45,25,20,143,0.0767,0.7,6100,293});
solve(pp)
toc

ans =

matrix([[0.77241798754647398716752139614632688]])

Elapsed time is 0.404959 seconds.
>>
再问：你好，刚才有个参数输入反了，麻烦你再帮我算一下吧，我电脑10多分钟没反应，哎。。。 syms f o s z k D t m q T x; p=f-o-(s-o)*(1-erf(0.5*z/(k*D*(t^m)*exp(q*(1/273-1/T))*x.^(1-m)/(1.78*(1-m)))^0.5)); pp=subs(p,{f,o,s,z,k,D,t,m,q,T},{0.1,0.02,0.45,25,20,143,0.0767,0.7,6100,293}); solve(pp) 谢谢~~
再答： >> tic syms f o s z k D t m q T x p=f-o-(s-o)*(1-erf(0.5*z/(k*D*(t^m)*exp(q*(1/273-1/T))*x^(1-m)/(1.78*(1-m)))^0.5)); pp=subs(p,{f,o,s,z,k,D,t,m,q,T},{0.1,0.02,0.45,25,20,143,0.0767,0.7,6100,293}); solve(pp) toc ans = matrix([[0.000029642713403242590992459746823182906]]) Elapsed time is 0.936017 seconds. >>

matlab函数计算syms f o s z k D t m q T x;p=f-o-(s-o)*(1-erf(0.5* 英语翻译A B C D E F G H I J K L M N O P Q R S T U V W X Y Z The 英语翻译1.A B C D E F G H I J K M N O P Q R S T V W X Y Z .Is I a b c d e f g h i j k l m n o p q r s t u v w x y z是什么... A b C d E f G h I j K l M n O p Q r S t U v W x Y z 是什么意思 a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T V W X Y Z A B C D E F G H I J K L M N O P Q R S T V W X Y Z (打一句英文话) A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.V.W.X.Y.Z. Ctrl+A,C,D,E,F,G,H,I,K,L,O,N,P,Q,R,S,T,V,W,X,Y,Z的作用 A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T, a+b+c+d+e+f+g+h+i+j+k+l+n+m+o+p+q+r+s+t+u+v+w+x+y+z+1+2+3+4+