地区控制中心 area control center 地区控制频率 area control frequency 使用视框差异之移动目标显示技术 area Moving Targed Indication(MTI) ..
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The frequency of DFB LD was driven and controlled through such technology as constant current, temperature control in active area, wavelength lock and etc.
该方案通过采用恒流源、有源区温度控制以及波长锁定等技术方法来实现DFB LD的稳频驱动及控制。
Aim: To explore the effect of radio frequency identification (RFID) technology used in the area of drug security control.
前言：目的：探讨无线射频识别技术在药品安全监管领域的应用与作用。
High power GTO inverter is used for railway electric traction. Its PWM control is significantly different from variable frequency drive system in conventional industrial area.
大功率GTO逆变器用于铁路电力牵引，其PW M控制与一般工业领域中的变频调速系统的PWM控制有很大不同。
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