very low frequency radiation 甚低频辐射
low-frequency acoustic radiation 低频声辐射
low frequency electromagnetic radiation 低频电磁辐射
ultra-low frequency electromagnetic radiation 超低频电磁辐射
Extremely low frequency electromagnetic radiation 极低频电磁辐射
Very-low-frequency Electromagnetic Field Radiation Controller 极低频辐射器
Studies the measurement of low frequency radiation noise from an underwater target by a vector hydrophone, discusses the method of measurement and presents the test results in the sea.
研究利用矢量水听器测量水下目标低频辐射噪声的问题，并给出了测量方法和海上试验结果。
These include enhanced emission of infrared (IR) radiation from the earthquake epicentre, as well as anomalies in low-frequency electric and magnetic
包括从地震震中传出来的经过加强的红外辐射，以及不正常的低频电磁现场数据。
Then, the radiation efficiency at low frequency and frequency response at high frequency in fluid are computed respectively by both SYSNOISE software and AUTOSEA software.
然后结合SYS-NOISE软件和AUTOSEA软件分别计算壳体在流场中声辐射效率在低频段和高频段时的频率响应。
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