RELASI GREEN PADA GAMMA-SEMIGRUP YANG DIBANGKITKAN DARI SUATU SEMIGRUP

In the Gamma-semigroup generated from a semigroup, we can define some equivalence relations called the Green relation. Furthermore, we can examine the relationship between the Green relation on the Gamma-semigroup and the Green relation on it’s generating semigroup.

Evaluation of Green Degree of Concrete Based on the Gray Relation

The indices system for the evaluation of green degree of concrete is established based on the function, durability and environmental protection of green concrete with involving both quantitative and qualitative analyses. Primary data is processed according to the green relation theory and in the meantime, analytic hierarchy process (AHP) is adopted to achieve the weight of indices, and in this way, the levels of the evaluation is fully expressed. The calculation of the correlation coefficient of each level leads to the concrete with the highest green degree, through which the evaluation of the green degree of concrete is received. And the example in this paper also proves the feasibility of the method above.