若导阀弹簧配上导向套筒，则可抑制弹簧的摇摆，使导阀芯运动更平稳。
If the pilot valve spring coupled driven sleeve, inhibited the spring swing to lead more stable valve movement.
由于这种方法能较好地反映地面运动的时域非平稳性，所以得到的计算结果更真实。
The results may better reflect the non-stationarity of ground motion in time domain and are closer to reality than those by wave theory and stationary random vibration theory.
地震动是由于地震引起的地面运动，其时间历程函数表现为具有突变特征的非平稳随机过程，因此更适于利用小波变换进行频谱分析。
The ground motion time function is a kind of time serial signals, which is a highly varying and nonstationary randow procedure and fit for wavelet analysis.
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