An additional variable is that the moon can have varying degrees of intensity, depending where it is during its 29.5 day cycle of waxing and waning.
还有一个变量即月光亮度，随着月亮29.5天一周期的盈亏，月亮的亮度会发生变化。
Can variable cycle times be modelled?
是否能够模拟可变时间周期？
Based on switch mode sensor of relative wind direction, we present a kind of tracing wind fuzzy control system with constant sample cycle and variable control cycle.
基于开关式相对风向传感器，提出一种固定周期采样、变周期控制的风向随动模糊控制系统。
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