Besides,the paper also submits a three-dimensional mould plate generation method taking into account side slope angle changes in various plan areas and various depth directions in surface mine

Crashworthiness performance simulation on sandwich panels of high-speed train cab;

Under the background of the construction of multilayer capital market both home and abroad,the paper has researched the difference between our country and foreign country in the construction of the multilayer capital market,and defined the positive meaning of constructing third board market,and indicated that property right exchange market is the foundation of third board market.

The major models include the main market; the second board market; the third board market and local capital market.

A relatively simple method for calculating three-layer shells was proposed for the complex problem of three-layer shell calculation, named as the method of stiffness equivalence, which was based on the research achievement of general thin-shell theory and could directly use those theoretical formulas.