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使用String(a, )：将一个标量表达式转为字符串表示
示例：
```
model String_f
para
·
2025-09-12
0
2
0
系统建模
专栏
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高校专区
常数：Modelica.Constants.e
函数：Modelica.Math.exp
示例：
```
model
·
2025-09-12
0
2
0
系统建模
问题求助
一般问题
工程师帮我看一下我的代码怎么修改，目的是实现变压器副边短路，用到的是饱和变压器，因为同源标准库中没有饱和变压器，所以利用
·
2025-09-11
0
11
1
系统建模
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