In order to save energy furthest,this paper synthesizes heat exchanger network based on each stream effective temperature level named“stream pseudo-temperature”which is obtained by each stream heat transfer temperature difference contribution value in- stead of a single global minimum approach temperature.

For the simulation accuracy of springback problem in sheet metal forming,the effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.

In the correlation, a concept of pseudoviscosity was used, which could be determined from the viscosity of mixtures, or estimated from the viscosity of pure components.

In this paper,to fully understand quentative financial products’ market risk ,the concept is introduced at financial products’vir tuallevel,computing for ula at virtual level based on fuzzy com prehensiv eevaluation according to fuzzy mathematics theory .