一、pfc 篇 在电能质量和用电效率越来越重要的背景下，采用 pfc+llc 架构的电源设计越来越普及，并已经开始在很多应用中替代传统的无 pfc 的方案或简单的反激、正激. 中文名称 宾夕法尼亚州立大学 外文名称 the pennsylvania state university 简称 宾州州立、penn state、psu 创办时间 1855年2月22日 主管部门 州内自治（郡级）属州立大学系统 类别 公立. 宾夕法尼亚州立大学（the penn state university）本科统计学系怎么样？ 收到了psu统计学系的transfer offer，想了解一下该校整体和统计学专业的情况。 横向对比uw.
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