楼: Originally posted by dingd at 2011-12-20 14:10:09:
现在有点明白国产软件发展艰难的原因了，起始Origin的创始人好像也是中国人，但在美国发展，大家有用正版Origin的吗？

楼: Originally posted by dingd at 2011-12-17 09:52:26:
用1stOpt试试：
[code]
Variable t,c;
ODEFunction c'=(4.41/96485-(4.41*k+L*4.41/96485)*c)/(1+4.41*k*t);
Data;
0        0
10        0.23211
30        0.45906
50        0.68601
70        0.92328
90        1.21213
110        1.32561
130        1. ...

3楼: Originally posted by dbb627 at 2011-12-16 17:31:51
function PenicilliumEst
clear all;
t=;
y=;
y0=0;

% Nonlinear least square estimate using lsqnonlin()
beta0=;
lb=;ub=;
= ...
    lsqnonlin(@Func,beta0,lb,ub,[],t,y,y0);         
ci = n ...