研究人员推断手机发出的电磁波(EMW)可能对男性激素水平及生育能力有着双重作用。
The researchers hypothesize that electromagnetic waves (EMW) emitted by cell phones may have a dual action on male hormone levels and fertility.
为了提取机车滚动轴承早期损伤类故障特征，本文提出了一种双重小波平均谱方法，并通过诊断实例验证了方法的有效性。
To extract early fatigue feature of engine bearings, the paper presents an average spectrum method with double-wavelet and the diagnosis examples are used to show the validity of the method.
应提供完全自动固态控制带全波整流器双重速率切换电池充电器。
A fully automatic solid state controlled dual-rate battery charger with a dry type full wave rectifier shall be provided.
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