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1)  periodic voltage
周期电压
2)  periodic potential difference
周期电位差,周期电压
3)  periodic voltage
周期电压,周期电动势
4)  non sinusoidal periodic voltage
非正弦周期电压
5)  arbitrarily periodical voltage and current
任意周期电压电流
1.
Based on the mathematical model of reactive power for arbitrarily periodical voltage and current waveform, which obey the fundamental energy conservation law, reactive power of rectifier(inverter) dc-side in AC/DC system is analyzed and calculated, its mathematical model is derived and physical essence is described.
为准确分析计算交直流输电系统的无功功率,采用基于任意周期电压电流的无功功率数学模型,推导了交直流输电系统的无功功率模型,阐述了交直流输电系统中无功功率的物理本质。
6)  periodic weighting
周期来压
1.
When working face advance is more 30 meters each time,main roof has a periodic weighting.
当工作面推进到60 m左右,老顶出现初次破断,形成初次来压,之后工作面每推进30 m,老顶出现周期来压。
补充资料:标准操作冲击电压波形(见冲击电压发生器)


标准操作冲击电压波形(见冲击电压发生器)
standard switching impulse voltage waveform

  b .oozhun CooZuo ChongJld,onyo boxlng标准操作冲击电压波形(standard switchingimpulse voltage waveform)见冲击电压发生器。
  
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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