The theory of economic cycle involves the research on the length of economic cycle. Compared with the ARMA method frequency scale method has several advantages.

经济周期的理论必然涉及经济周期长度的研究，相对于常用的自回归移动平均方法，谱分析方法具备一定的优点。

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To improve beamforming under low signal-to-noise ratio, a method based on stochastic resonance(SR)in a bistable model is investigated by using a frequency scale transformation method.

为了改善低信噪比下波束形成的性能，从双稳态随机共振模型出发，提出了利用频率尺度变换，将随机共振和波束形成结合起来的算法。

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The thesis aims to develop a micro-vibration platform using Giant Magnetostrictive Vibrator (GMV), which is expected to improve the vibrating force and frequency scale of vibration welding technic.

针对振动焊接中激振器的激振力不大、频带不宽等缺陷，本文研制了一种以超磁致伸缩激振器为执行元件的微振动平台。

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Other sections of the protocol govern the frequency, scale and area of such maneuvers.

CNN: A complex security minuet has started in North Asia

All questions, apart from those about frequency of sex, were answered on a five-point scale, with one indicating strong disagreement and five indicating strong agreement.

ECONOMIST: Chastity before marriage may have its uses after all