1) passive hydrogen maser
被动型氢原子钟
1.
Rectangular magnetron cavity for passive hydrogen maser is designed.
本文设计了用于被动型氢原子钟的矩形磁控管微波腔,并分析了结构参数对微波腔频率和Q值的影响。
2) miniature passive hydrogen maser
被动型小氢钟
1.
Miniature passive hydrogen maser is developed at Shanghai Observatory which employs compact cavity design and square wave frequency modulation.
介绍了上海天文台被动型小氢钟的设计和研制 ,给出了初步的测试结果。
2.
Miniature passive hydrogen maser is developed at Shanghai observatory.
介绍了上海天文台被动型小氢钟的研制进展,给出了当前的测试结果。
3) Hydrogen Maser
氢原子钟
1.
Hydrogen absorbing alloys have been widely used today to store the hydrogen,they also can be applied to the Hydrogen Maser.
合金储氢方式现在已被广泛采用,这种储氢方式也可应用于氢原子钟。
2.
The hydrogen maser is the generally available frequency standard with the smallest frequency instability for all but the shortest measuring time interval.
氢原子钟是一种最稳定的 (除极短测量时间间隔之外 )频率标准 ,但是环境温度变化及微波谐振腔老化会引起原子钟输出频率的变化 ,从而导致氢原子钟长期性能变差。
3.
To offer high-precision time/frequency signals, people have developed hydrogen masers of which all terms of performances are excellent excepting long-term frequency stability.
为了提供高精密的时间频率,人类已经研制出氢原子钟,除长期稳定度之外,它的各项性能都是十分优秀的。
4) Atomic Hydrogen Maser
氢原子钟
1.
Design of Atomic Hydrogen Maser Remote Monitor System Based on Virtual Instruments;
基于虚拟仪器的氢原子钟远程监测系统
5) Passive Atomic Frequency Standard
被动型原子频标
1.
Unreal Time Control Approach and Application in Passive Atomic Frequency Standard;
非实时控制及其在被动型原子频标中的应用
6) Positive Hydrogen Clock
主动型氢钟
补充资料：被动
①待外力推动而行动（跟‘主动’相对）：工作要主动，不要～。②不能造成有利局面使事情按照自己的意图进行（跟‘主动’相对）：由于事先考虑不周，事情搞得很～。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条