1、

The results also indicate that when special filters are connected to secondary three-phase system, the primary harmonic currents decrease by about 28% than by using conventional two-phase filters.

结果还表明,当在二次侧三相系统接入文中提出的特殊滤波器时,谐波电流比用常规两相滤波器降低约28%。

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2、

It produces the primary signal first to carry on the display of time domain, the display of frequency domain and frequency spectrum, and compose the observing signal; finally it carries on the correlation analysis again after the signal filtered to remove the harmonic interference signal.

首先是对原始信号进行时域波形显示,频域频谱显示,初步观察信号的组成,最后再对滤波后的信号进行相关分析,除掉谐波干扰信号。

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3、

The primary investigation of intermittent second harmonic contrast imaging in normal liver

正常肝脏间歇二次谐波声学造影的初步研究

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4、

harmonic resonance frequency factor of a spur geared system and primary resonance research

齿轮系统谐波共振频率因子与主共振响应研究

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