Both these two units are merged into Xiaohe ultra-unit from the structural evolution.

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 .

The Main stream and tributaries above Cuntan Station were separated into many reaches according to the spread time of flow,and every reach is separated into many unit reaches.

The main stream and tributaries above the inflow reservoir station Cuntan were divided into several sub-reaches according to the propagation time of flow,and the sub-reaches were divided into unit reaches according to the calculation time interval.

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.