西微所--微电机杂志 关键词：单支撑超声电机；速度波动率；压力自平衡 [gap=863]Key words: single bearing ultrasonic motor; speed fluctuation ratio; pressure auto-balance
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不仅仅是商业周期到了生产率增长速度减慢这一点，它还有加剧暂时生产率波动的几个特征。
Not only has the business cycle reached the point at which productivity growth usually slows, it also has several characteristics that may have exacerbated temporary productivity swings.
无论是轴向、径向固含率还是固体颗粒的径向速度都是随时间波动的。
Axial and radial holdups of solid particles and radial velocity of solid particles are all fluctuating with time.
增大拉伸比、拉伸速度和拉伸温度能有效地减小张力波动和不匀率。
The tension fluctuation and irregularity of fiber decreases with the increase of drawing ratio, speed and temperature.
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