周期选择 meaning in Chinese

cycle selection

In this chapter , how to accumulate sampling time in network control system is analyzed at first , because every network control system will face this problem
选取合适的控制器采样周期是网络实时控制系统设计必须面临的问题，文中根据网络管理系统特有的性质，提供了采样周期选择原则。
In those instances , the responsible product engineer may chose to grant a deviation ( s ) for a short period of time until tool or process changes can take place that will minimize or eliminate the effect of porosity
在这些情况下，产品负责工程师可以在一个短的时间周期选择一个偏差，直到模具和工艺更改使得孔隙减少或者消除。
This paper utilizes masking rate theory to analyze the variation of center zero - level energy , the influence of metallic mesh ’ s different parameters on infrared transmitting ; deduces the relational expression between infrared transmitting efficiency and metallic mesh ’ s parameters ; comes to the conclusion that we can improve infrared transmitting efficiency by increasing
理论研究表明,金属网栅的周期选择在200 ~ 400 m之间,线宽不大于10 m ,是较为理想的网栅参数。最后,在实验室里用1 ~ 20ghz的信号发生器、功率放大器和频谱分析仪等雷达波检测设备,对金属网栅的屏蔽效率进行测试。