谈到数学，并不缺乏相关的计算机软件包。
When it comes to mathematics, there is no dearth of computer software packages.
分析了永磁同步电机用于矢量控制的数学模型，并建立了基于其数学模型的电机控制仿真软件包。
The mathematic model of PMSM used in vector control is analyzed, and electrical machinery simulation control software package is established based on its mathematical model.
建立了管径优化与泵站优化计算的数学模型，确定了模型的解法并引入了LINGO优化软件包。
Mathematical models for pipe diameter optimization and pump station optimization calculation were constructed, solution to model was determined and LINGO optimization software package was introduced.
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