According to the features of rock texture, the rock type is (metamorphic) pyroxene syenite, the intrusive rock can be divided into two units, and apposited to Dongjikou ultra-unit- Whose original magma is the product which upper-mantle melted partly and differented.

Basing on the study about the unit-superunits of granites, the authors divide the member of Laiyuan-Badaling batholith, discuss the main characteristics of the unit-superunits, and point out that this member of .

A new method in which an array of extreme thin elements is used to cope with singular point is presented, calculation program is simplified and a good result is rapidly reached.

A Study of the Key Problem in the Application of Superelement

The finite element method was applied to model the complex suspension chassis and the component mode synthesis superelement theory was applied to reduce the dimension of the chassis dynamic model.

Every min closed region is regarded as a superelement and every superelement is changed into a ruled square under the local coordinate system by double linear interpolation.

A super-element approach to structural identification in time domain;

Aiming at this problem,by the coordinate transformation of shape function the idea of super-element is adopted to divide grid with the programming of Fortran language.