The gradient amplifier is an essential equipment of Magnetic Resonance Imaging system (MRI). It supplies the gradient coils with pulse currents according to the signal from the control system.

梯度放大器是核磁共振成像(MRI)系统的核心设备之一，它根据前级控制系统传来的指令，向梯度线圈提供特定波形的电流脉冲。

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It is investigated that the characteristics of stochastic resonance of the periodic pulse signal added Gaussian white noise through a threshold system.

研究含有高斯白噪声的周期脉冲信号，通过阈值系统后的随机共振特性。

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For thousands of years the Schumann Resonance or pulse (heartbeat) of Earth has been 7.83 cycles per second, the military have used this as a very reliable reference.

千万年以来，地球的Schumann共振(Schumann Resonance)或脉冲(心跳)为每秒7.83周，军事上一直将其作为极其可靠的参考来使用。

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