The correlated parameters are executed with sensitivity analysis,the obtained curves show the rationality of chosen design variables and got optimal result,however,sensitivity analysis with two economy parameters i.

In this article new frequency function will be minimized to solve time varying system identification of design variables for frequency region.

To solve the problem of design change of auto panel dies,the integrated information in different developing stages of auto panel dies is firstly analyzed.

Their are effective measures of costs control for mountainous expressway construction,such as aborative design,enhancement of follow-up service of design,strengthening of management for design change,positive cooperation among all the participants of the construction,strictly controlling of design change.

Due to the start of construction in a hurry,some design changes and optimization have been made after the start of project construction,such as increasing the rated head of unit,adoption of gravity dam connecting with two banks,using GIS for switchyard equipment,river closure ahead o.

Configurable product structure model for variant design;

Product modeling method and its realization for assembly variant design;

Configuration product variant design for mass customization;

Issues related to change of design are discussed in terms of procedure and principle of design change.

Assembly variant design methodology in agile manufacturing;

Variant Design of Dies CAD System Based on Assembly Model;

The problem in development of dies CAD system is discussed in the paper,variant design of which is based on assemble model.