If its parameters of product size and performance and so on all have certain proportional relationship,the design will be done by using similar design theory.

Using similar design theory,the geometry sizes of the driven shafts in the reduction gearboxes were calculated;Throughing series components design table in SolidWorks,digitized fast design of the driven shafts series in the reduction gearboxes were finished.

Based on maximum entropy two-stage optimization design theory, maximum entropy two-stage optimization design system including truss, beam, frame structures is founded in this thesis.

Fuzzy Mathematics theory has been applied to the selection of testing mining method for Er-Dao-Gou Gold Mine, in which similarity optimazation ratio principle was used to determine a few alternatives initially, according to the dip and thickness of orebody and the f value of rock mass.

By adopting a series of unique and advanced technologies,such as similar design,new high- temperature materials,sufficient tests,advanced LP casing module,the unit s cost-effectiveness,safety and reliability have reached the advanced level in the world.

The paper involves the technical features of the ultra supercritical 1000MW steam turbine made by HTC and TSB,By adopting similar design,new high-temperature materials,sufficient tests, advanced LP casing module and a series of particular and advanced technologies,The unit s cost-effectiveness and reliability have reached the advanced technology in the world.