It is also proved that the crest factor of the multicarrier signals, constructed of any one polyphase complementary sequence of a polyphase complementary sequence pair, is less or equal to 6dB.

The relative superiority was calculated and used to compare ranges of the target parameters.

Then, it gives the definition of relative superiority describing big or small interval number, and a new ranking method of fuzzy complementary matrix respectively.

Then using a interval distance formula, a relative superiority formula is given to compare any two intervals.

In this paper, fuzzy optimal selection theory based on the concept of relative importance degree is adopted to determine relativity of the degree of environment impact of chemical compounds as EII, and environment impact assessment (EIA) of a chemical proces.

In this paper the fuzzy optimization algorithm with the concept of relative importance degree (RID) is proposed to solve multi-objective problem for chemical process, and graphic method is utilized to simplify the calculation.

Based on binary comparison, a kind of algorithm is presented for resolving the objective weight and relative membership degree of qualitative objects using fuzzy value of relative important degree of adjacentobjects.

Firstly the multiple objectives difficult to measure are converted to a single objective with relative membership degree by Two Stage Fuzzy optimizing theory.