Principle and class of active power factor correction(APFC) are introduced.
主要介绍了有源功率因数校正（APFC）的工作原理、电路分类。
BCH codes are a subset of the class of linear block codes that have good error correction capability. Information hiding is a new technique in information security field.
BCH纠错编码是线性分组码的一种，有较好的纠错能力，信息隐藏是近年来信息安全领域出现的新技术。
The optimum analytical conditions, experimental reproduction, standard deviation, quantitative correction factors of hydrocarbon class and so on were investigated.
确定了最佳分析条件、烃族的定量因子等。
The optimum analytical conditions, experimental reproduction, standard deviation, quantitative correction factors of hydrocarbon class and so on were investigated.
确定了最佳分析条件、烃族的定量因子等。
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