为了记录短周期地磁脉动，我们研制了81型照相记录感应式地磁脉动观测系统。
We have made a system of optically-recording induction magnetometer of 81-type, for micropulsation observations along Eastern Coast of China.
得出了各地震台台基的脉动噪声的均方根值、观测动态范围、地噪声功率谱。
The article calculates the mean square root values of pulse noise, observational dynamic range and power spectrum of ground noise of all seismic station bases.
通过水中爆炸水击波及其多次脉动的观测，分析了水击波及其多次脉动的传播速度、脉动周期、频率及能量分布等特性。
Through observation on shock wave and multiple pulsating caused by underwater blasting, the velocity, period, frequency and energy of shock wave and multiple pulsating are analysed.
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