持久层框架和工具包帮助文档,很经典~-lasting layer framework and tool kits to help documentation, classic ~

To calculate the resistance and SPL (sound pressure level) of an micro-loudspeaker.The methed to be used is electro-mechano-acoustical circuit.It runs at the platform of mathematica.

图书销售，比较简单，里面是一篇课程设计，采用c++和spl 2000 设计完成。-book sale