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.

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.

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.