At present, Shaanxi does not exist the ECK between environmental quality and economic development, and its development is still before the inflection point. It has the remarkable fluctuation characteristic.
目前陕西环境质量与经济发展之间不存在ECK关系,其发展仍在拐点之前,有显著的波动特征。
参考来源 - 陕西环境质量与经济增长关系的实证研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Based on Normal Mode theory, the explanation of sound field fluctuation characteristic caused by internal waves is given.
基于声简正波理论，给出了内波导致声场起伏特性的一般理论解释。
Cyclical fluctuation of production and price is the main characteristic of pig industry.
生猪产业的一个主要特征是产量和价格的周期性变化。
The experiments indicate that the amplitude of plasma optic signal and fluctuation can be used as characteristic signal for real-time monitoring and control for titanium laser welding.
上述试验结果表明，可以用等离子体光信号的幅值高低和波动大小作为焊接质量实时监测和控制的特征信号。
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