While other animals' brain regions development in synchrony, in humans, the development of the PFC lags far behind that of other areas.
其他动物的大脑区域发育是同步的，而人类的PFC发育远远慢于大脑其他区域。
This claim hinges on a peculiar and unique feature of our cognitive architecture: the stunningly slow development of the prefrontal cortex (PFC).
这一观点是基于人类奇特而独一无二的认知结构——发育惊人缓慢的前额皮质(pfc)。
PFC Energy, a consultancy, calculates that 77% of the world's oil and gas is found in countries whose production is controlled by state-owned oil firms and their partners.
PFC能源（一家咨询公司）认为77％的全球石油和天然气储于国有公司和合作伙伴控制着石油生产的国家。
A method of PFC in paralleled inverted power system.
三逆变电源并联系统的功率因数校正方法。
It can also be used for passive lossless snubber in PFC.
提出的结构可以应用于实现PFC的无源无损吸收。
PFC is one of the key points in the design of power supply.
功率因数校正(PFC)是电源设计中的关键内容之一。
The paper discussed a half-bridge converter of single-stage PFC with ZVZCS.
文章讨论了一种带有ZVZCS的单级PFC半桥变换器。
At the end of the article, it summarizes the trends of active PFC technology.
最后概括了有源功率因数校正技术的发展趋势。
As a result of it, PFC has become one of the study focuses in power electronics.
这使得功率因数校正技术成为电力电子研究的热点之一。
Power factor correction (PFC) technique based on SEPIC converter is researched in this paper.
本文对基于SEPIC变换器的功率因数校正技术进行了研究。
A flyback converter with zero current switching (ZCS) resonant and power factor correct (PFC) is proposed.
提出一种具有零电流关断(ZCS)的反激式单级功率因数校正(PFC)变换器。
The damage zone distribution is described by PFC. The local damage and damage extent are also analyzed by PFC.
最后利用PFC描述了损伤区的分布，分析了损伤局部化特征和损伤程度的变化。
PFC circuitry operates in critical conduction mode(CCM)and provides for high PF, low THD and DC bus regulation.
内部的功率因数校正（PFC）电路以临界导通模式（CCM）工作，可获得高功率因数、低总谐波失真（THD）及直流电压调整。
The PFC numerical simulations (Discrete Element Method) were carried out on the base of the results of model test.
在室内模型试验的基础上对加筋路堤进行了颗粒流离散元模拟分析。
This paper made a detailed introduction of passive and active PFC, especially the type and control mode of active PFC.
本文针对无源pfc和有源pfc做出了详细的介绍，特别针对有源pfc的类型、控制方式着重介绍。
Base on chip L6561, a PFC preregulator for 400w metal halide lamp ballast is designed with wide input and output range.
基于常用的L6561芯片，设计了宽输入输出范围的400瓦金属卤化物灯电子镇流器功率因数校正电路。
The new approaches for charge pump power factor correction (PFC), digital PFC and on - line UPS with PFC are introduced.
介绍了充电泵功率因数校正（PFC）、数字PFC和带PFC的在线UPS的几种新方法。
Recently, internal and overseas investigators are developing single-stage PFC circuit, which has higher PF and lower price.
现在国内外正在开发研究单级功率因数校正电路，具有很高的功率因数，且成本低。
The principle of charge pump for achieving power factor correction (PFC) and its unity power factor condition are analyzed.
分析了电荷泵电路实现功率因数校正（PFC）的基本原理和条件；
Single-phase PFC circuit is widely used in communication power, UPS and other devices with its simple structure and control.
单相PFC电路以其结构简单，控制方便等特点，广泛应用于通讯电源、UPS等设备中。
Zero current transition (ZCT) topology of the single switch three phase boost power factor correction (PFC) rectifier is proposed.
提出了一种零电流开关结构的单开关管的三相升压功率因数校正整流器。
This dissertation is focused on the research of soft-switching technology, PFC technology, and integrated power electronic module.
本文的研究包括了软开关、功率因数校正和电力电子集成技术等三个方面的内容。
The PFC system developed by this paper chooses IRMCF343 as the main control chip, which has a unique asymmetric dual-core structure.
本课题开发的数字PFC系统以IRMCF343为主要控制芯片。IRMCF343为独特的不对称双核结构。
This paper introduces a novel topology about single-stage PFC converter based on bridge inverter and analyzes its theory of operation.
提出了一种基于桥式逆变电路的新型单级功率因数校正变换器的电路拓扑。
To reduce the component counts and the cost, the single-stage power factor correction (PFC) techniques have attracted more and more attention.
在低功率应用中，为了减少器件和成本，单级功率因数校正(PFC)技术越来越受到人们的关注。
The power factor correction (PFC) and half-bridge inverter circuit topology are commonly used in modern high power factor electronic ballasts.
现代高功率因数电子镇流器结构中普遍采用功率因数校正（PFC）和半桥逆变谐振电路拓扑。
The power factor correction (PFC) and half-bridge inverter circuit topology are commonly used in modern high power factor electronic ballasts.
现代高功率因数电子镇流器结构中普遍采用功率因数校正（PFC）和半桥逆变谐振电路拓扑。
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