According to the change pattern of some parameters in metal cutting processes, this paper proposes for the first time a new time series analysis model-Autoregressive Constant model ARC (2).

本文根据切削过程中一些参数的变化规律，从理论上首次提出了一种新的时间序列分析模型，即常系数固定价ARC(2)模型。

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If migration and growth in future years will be similar to Population Zero (10,000 people in a new manufactured city at a time), how would you change your model for the next few migrations?

如果未来几年的移民和增长将类似于人口零(一次在一个新的制造城市10,000人)，你将如何改变您的模型为下几次迁移？

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It brings a new PFC circuit and analyzes the principle of the resonant PFC, thus get the simple model with single phase time change for analyse.

提出了一种新型的功率因数校正(PFC)电路，分析了准谐振pfc的工作原理，进而得到单相时变简化分析模型。

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