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    • 3. 发明授权
    • Frequency synchronization apparatus and method in OFDM system
    • OFDM系统中的频率同步装置和方法
    • US08275059B2
    • 2012-09-25
    • US12477269
    • 2009-06-03
    • Bon Young KooHyung Jin ChoiSe Bin ImJung In Kim
    • Bon Young KooHyung Jin ChoiSe Bin ImJung In Kim
    • H04L27/28
    • H04L27/2657H04L27/2676H04L27/2688
    • A frequency synchronization apparatus includes: a correlating unit that obtains a first correlation value by correlating a known reference guard interval of an OFDM symbol and a reference copy interval corresponding to the reference guard interval, and obtains a second correlation value by correlating the estimate guard interval and an estimate copy interval corresponding to the estimate guard interval; a determining unit that compares the first and second correlation values to determine a first case where the first correlation value is larger by a pre-set magnification than the second correlation value, a second case where the second correlation value is larger by a pre-set magnification than the first correlation value, and a third case which is not the first case nor the second case; and a frequency offset estimating unit that estimates a frequency offset by using a correlation value corresponding to any one of the first to third.
    • 频率同步装置包括:相关单元,通过将OFDM符号的已知参考保护间隔与对应于参考保护间隔的参考复制间隔相关联来获得第一相关值,并且通过将估计保护间隔 以及对应于估计保护间隔的估计复制间隔; 确定单元,其比较所述第一和第二相关值,以确定所述第一相关值比所述第二相关值大预定倍数的第一情况,所述第二相关值大于预设值的第二情况 并且不是第一种情况的第三种情况也不是第二种情况; 以及频率偏移估计单元,其通过使用与第一至第三中的任一个相对应的相关值来估计频率偏移。
    • 4. 发明申请
    • Manufacturing method of metal oxide nanostructure and electronic element having the same
    • 金属氧化物纳米结构的制造方法和具有该金属氧化物纳米结构的电子元件
    • US20110049467A1
    • 2011-03-03
    • US12862895
    • 2010-08-25
    • Hyung Koun ChoDong Chan Kim
    • Hyung Koun ChoDong Chan Kim
    • H01L29/66H01L21/34
    • H01L21/0262B82Y10/00H01L21/0237H01L21/02472H01L21/02483H01L21/02554H01L21/02565H01L21/02603H01L21/02645H01L29/0665H01L29/0676Y10S977/811Y10S977/89
    • Disclosed herein is a manufacturing method of metal oxide nanostructure, including the steps of: (S1) supplying a precursor containing a first metal, a precursor containing a second metal and oxygen onto a substrate; (S2) forming an amorphous second metal oxide layer on the substrate; (S3) forming first nuclei containing the first metal as a main component and second nuclei containing the second metal as a main component on the substrate; (S4) converting the first nuclei into single crystalline seed layers spaced apart from each other and converting the second nuclei into amorphous layers surrounding the first nuclei; and (S5) selectively forming rods on the seed layers and then growing the rods.The manufacturing method of metal oxide nanostructure is advantageous in that the area and thickness of an amorphous layer can be controlled by controlling the flow rate of the main component of the amorphous layer and the flow rate of the main component of the single crystalline seed layer, thereby controlling the density and diameter of the seed layer.
    • 本文公开了一种金属氧化物纳米结构的制造方法,包括以下步骤:(S1)将含有第一金属的前体和含有第二金属和氧的前体供给到基板上; (S2),在所述基板上形成非晶质的第二金属氧化物层; (S3)在所述基板上形成以所述第一金属为主要成分的第一核和包含所述第二金属作为主要成分的第二核; (S4)将第一核转换成彼此间隔开的单晶种子层,并将第二核转变成围绕第一核的非晶层; 和(S5)选择性地在种子层上形成棒,然后使棒生长。 金属氧化物纳米结构的制造方法的优点在于,可以通过控制非晶层的主成分的流量和单晶种子层的主成分的流量来控制非晶层的面积和厚度, 从而控制种子层的密度和直径。
    • 6. 发明授权
    • Method and device for reclosing control using a harmonic ratio
    • 使用谐波比重新控制的方法和装置
    • US08743519B2
    • 2014-06-03
    • US13179696
    • 2011-07-11
    • Chul Hwan KimChul Moon LeeHun Chul Seo
    • Chul Hwan KimChul Moon LeeHun Chul Seo
    • H02H3/00
    • H02H3/066H02H1/0015
    • The reclosing control device configured to perform a reclosing control in case of a fault in a transmission line. Further, the reclosing control device includes a voltage detection unit configured to detect a faulted phase voltage waveform and extract a harmonic component contained in the faulted phase voltage waveform; a HR calculating unit configured to calculate ratio values between even harmonics and odd harmonics based on the extracted harmonic component; and a reclosing control unit configured to determine whether or not an arc is finally extinguished based on the calculated ratio value and perform a reclosing control depending on a result of the determination.
    • 所述重合闸控制装置被配置为在传输线路中发生故障的情况下执行重新闭合控制。 此外,重合闸控制装置包括电压检测单元,被配置为检测故障相电压波形并提取包含在故障相电压波形中的谐波分量; HR计算单元,被配置为基于所提取的谐波分量来计算偶次谐波和奇次谐波之间的比值; 以及重新配置控制单元,其被配置为基于所计算的比值确定电弧是否最终熄灭,并且根据所述确定的结果执行重新闭合控制。
    • 10. 发明授权
    • Power conversion system for eliminating low frequency ripple current and control method thereof
    • 用于消除低频纹波电流的电力转换系统及其控制方法
    • US08369117B2
    • 2013-02-05
    • US12631941
    • 2009-12-07
    • Byoung Kuk LeeJong Soo KimHyun Soo KangGyu Yeong Choe
    • Byoung Kuk LeeJong Soo KimHyun Soo KangGyu Yeong Choe
    • H02M1/00H02M7/757
    • H02M1/143H02M2001/007
    • There is provided an integrated control method for eliminating a low frequency ripple in a power conversion system for a fuel cell, more particularly, a control method of a power conversion system capable of eliminating a low frequency ripple, controlling a DC link voltage, and controlling an output power and a system using the same control method. A power conversion system (PCS) that converts an output of a DC power supply received from an external power supply includes a converter that converts a voltage of the input power supply; an inverter that converts an output voltage of the converter into an AC voltage; and a converter control module that outputs a PWM signal for controlling a switch of the converter, and after receiving a power instruction value, the converter control module generates the PWM signal for controlling the converter based on the power instruction value.
    • 提供了用于消除燃料电池的电力变换系统中的低频纹波的集成控制方法,特别是能够消除低频纹波,控制直流链路电压以及控制的电力转换系统的控制方法 输出功率和使用相同控制方法的系统。 用于对从外部电源接收的直流电源的输出进行转换的电力转换系统(PCS)包括转换输入电源的电压的转换器; 将转换器的输出电压转换为交流电压的逆变器; 以及转换器控制模块,其输出用于控制转换器的开关的PWM信号,并且在接收到功率指示值之后,转换器控制模块基于功率指令值生成用于控制转换器的PWM信号。