This paper introduces the principle of frequency changing method of grounding resistance measurement, the structure of frequency conversion measurement apparatus and data process method.
介绍了变频法测量接地电阻的原理、接地电阻变频测量仪的结构、数据处理方法和实测结果。
Consider a warehouse that's changing from a manual "print and select" method to an automated Radio Frequency Identification (RFID) or wireless barcode system.
请考虑一个从手动的“打印和选择”方法更改为自动无线频率识别(Radio Frequency Identification, RFID)或无线条形码系统的仓库。
By using a numerical method, the effect of changing in magnetic field upon vibration frequency and coefficient of reduction is presented.
最后给出数值结果，表明磁场的变化对振动频率及衰减系数的影响。
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