The digital excitation regulator is very popular in the small electric plant. This kind of regulator can improve the working condition of generator and its work
This paper will review the topic of phytoextraction,a major approach of phytoremediation,by clarifying the roles of hyperaccumulators,bio-mechanisms involved,is
DEA is a new research field in operations research. It has unique virtues in dealing with assessment problem with multi-inputs especially multi-outputs, In this
During the desing of channel transect,the paper brings forward golden section method,which is 0. 618methods. In order to reduce the calculation volume of the na