...6 在压力支持通气（PSV）期间，有关其控制变数（control variable ）、限制变数（limit variable ）和周期变数（cycle variable ）之描述，何者为真？
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cycle variable rate sampler 循环变率取样器
variable cycle [数] 可变周期 ; 变循环
variable cycle operation [计] 可变周期操作 ; 可变循环操作 ; 可变周期运行
variable cycle engine 变循环发动机
variable-cycle loading 变周期加载
variable cycle RP-EKF 变周期距离参数化扩展卡尔曼滤波
f variable cycle engine f136变循环发动机
practical variable cycle engine 实际的变循环发动机
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。
The allowable availability was selected as constraint, the maintenance cost was identified as optimization objective, the maintenance cycle was as optimal variable, the optimization model was set up.
以设备许用可用度为约束条件，以维修成本最低为目标，以维修周期为变量，建立设备维修优化模型。
Can variable cycle times be modelled?
是否能够模拟可变时间周期？
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