An adaptive sliding mode control based on fuzzy wavelet network is proposed to guarantee the effects of the tracking error and external disturbances can be attenuated to a specific attenuation level.

提出了一种自适应模糊小波神经网络的滑模控制策略，保证系统的跟踪误差和对外界干扰的抑制被衰减到期望的程度。

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In this paper, we mainly discuss the determination of specific parameters of potential sources, the prediction of attenuation laws of ground shock and the selection of occurrence model of earthquake.

本文主要讨论潜在震源区地震参数的确定、地震动衰减规律的预测以及地震发生模式的选定。

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The acoustical properties and specific heat of sample at low temperatures were studied, and the temperature dependences of modulus, sound attenuation and specific heat were obtained.

对其低温的声学和比热容性质进行了研究，得到了样品模量和声衰减以及随温度变化的规律。

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