This paper puts forward a "Spectrum Analysis" method to analyse the random power oscillation in power system caused by external disturbance, and sets up a complete digital model.
本文提出了用“频谱分析”的方法分析外部扰动引起的电力系统随机振荡，并建立了完整的数学模型。
So, a complete and effective urban guide system is needed to provide the convenience and comfort to the life of citizen and external staff.
为了市民和外来人员的生活方便和舒适性，这就需要有一套完整有效的导向系统来支撑。
The system use IPC structure and has complete external equipment interface and enlarge functions easily.
该系统采用了IPC结构，外设接口齐全，功能扩展容易。
Require the enterprises to form their own more complete e-commerce system, improve internal and external factors to adapt to.
要求企业形成自己较完整的电子商务体系，完善内因，来适应外因。
By extending the method used for the case of no external feedback system, a complete set of equations is derived.
通过推广无反馈时的计算方法，导出了描述问题的完整方程组。
By extending the method used for the case of no external feedback system, a complete set of equations is derived.
通过推广无反馈时的计算方法，导出了描述问题的完整方程组。
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