It is shown that, there exists the same peake value for both the linear and nonlinear wakefields and the corresponding wave-breaking condition is obtained.

Single factor study on the microwave pyrolysis of bamboo residues;

At last some kinds of rapid pyrolysis techniques are developed, and a new method called microwave pyrolysis was presented.

Among those technologies such as shear wave exploration, P-S converted waves, multi-component seismic, VSP, P-wave AVA, AVO, AVOZ and VVA, the most effective method in detecting fractures is shear-wave splitting.

The problem of undulance `crack' which display on RT negation of explosive welding stainless complex steel pressure vessel and head plate has puzzled pressure vessel trade for many years, Which ofen arosed disputed.