Illustrate the importance of subsidence calculating in the reconstruction of old city through the calculating analysis of subsidence in some engineering accident,analyze characteristics of some kinds of basic common types to show small bore precast pile have evident economic and social profit advantage in the reconstruction.

In this paper, the surfaces with parallel nondegenerate minimal section is studied, By using the Simons formula and the method in [1], we generalize a series of results [1] to the 2 +p dimensional space form.

Dual-frequency Electromagnetic Forming for Heat-resisting Stainless Steel Parts with Small Cross Section Rod Feeding;

The method, which is derived from the least cross section difference of the physical quantity, has shown to produce a reliable result in the presence of error sources, such as noise, phase discontinuity more than π and insufficient sampling, etc.

In this thesis, the temperature field of small-section square tubes was analyzed and measured firstly, disposing the pipe bottom heat border with contact convection method, considering the changes of mate.