2楼: Originally posted by dingd at 2014-10-05 20:16:08
先把公式用简单的字母简化下，别用化学符号，更容易理解些。

Variable t,C1,C2;
ODEFunction C1'=-k1*t;
                 C2'=-k2*C2*C1;
Data;
t=0,0.1,0.2,0.3,0.4,0.5;
C1=0.1,0.09,0.08,0.06,0.05,0.047;
C2=0.01,0.0009,0.00008,0.000007,0.000000069,0.00000000066;

4楼: Originally posted by dingd at 2014-10-06 20:36:44
第二个公式：dC(2)=-(k(2)*k(4)+k(3))*C(2)*C(1）
完全可简化等同于：dC(2)=-k(2)*C(2)*C(1）

否则会出现过拟合现象，参数组值不唯一。

1stOpt求解：

Variable t,C1,C2;
ODEFunction C1'=-k1*t;
       ...

6楼: Originally posted by dingd at 2014-10-07 20:24:37
拟合如下方程：y=a+b*c*x
无法得到稳定解，有无穷多组b和c值，原方程等同于：y=a+b*x

8楼: Originally posted by dingd at 2014-10-08 12:59:11
data后面少“;”号。还有如果用的是网上流行的破解1.5版的话，是不能进行微分方程拟合计算的。

9楼: Originally posted by 水中的梦88 at 2015-10-19 20:59:37
请问那个版本以上的可以做，谢谢！...