应用非线性泛函分析的理论和方法研究了一类二阶线性微分方程，证明了周期衰减解的存在性。
The second-order nonlinear differential equations are studied and the existence of the periodic degenerate solution is proved with the principle of the functional analysis.
这通常有助于允许系统的响应在采样周期结束之前自然衰减到零。
This can often help by allowing the response of the system to naturally decay before the end of the sample period.
皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。
There a good coincidence in the calculation of shield layer current and measuring results in the aspect of waveform, oscillating circle and attenuation law.
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