虽然 pfc 的主业是把 ac 输入电流整理好，但由于 pfc 电路通常是基于 boost 结构的，它还能顺便把宽范围的输入电压提高到一个固定的值（通常是 400v 左右），这就刚好. 一组 c++ 库的集合，提供了线性代数、伪随机数生成、多线程、图像处理、正则表达式、单元测试等功能。 早期开发者多为 c++ 标准委员会成员，一些 boost 库也被收入 c++ tr1 和 c++11.
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