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Ground penetrating radar is a high-resolution engineering geophysical method which has better detection effect to disengaging, cavities and leakiness in urban road base. This paper is based on the principle of ray tracing through the forward modelling of urban road base hollow, empty and not dense disease, analyses waveform, frequency, wave propagation characteristics of primary disease forward image simulation. The paper summarizes the urban road base diseases in ground penetrating radar profile feature of signal, and analyses field exploration radar profile and further research on primary diseases of urban road ground penetrating radar fingerprint for urban road base disease detection of ground penetrating radar data interpretation to provide the reference.

Theoretical and experimental approaches are used for studying the elastic and thermal properties of [Zr.sub.2][Al.sub.3][C.sub.4] carbide. The elastic and thermal properties are useful for understanding the intrinsic properties of [Zr.sub.2][Al.sub.3][C.sub.4] for high temperature applications.