分别取北通道功率变化率及南通道功率变化率为调制信号对系统暂态稳定裕度及直流系统的影响；
The influence on grid's transient stability margin and DC system is also studied while the power slope of north or south AC transmission system is taken as modulation signal respectively.
实验结果表明反射率的变化随着泵浦激光功率的增强而增大。
Experimental results show that the reflectivity change increases with the power of the pump laser.
测定并分析了不同微波加热功率、加热时间条件下木材的表面温度、干燥速度和含水率的变化规律。
The changing regularity of drying speed, moisture content and surface temperature of wood was determined and analyzed at different microwave heating power and different heating time.
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