On the basis of the analysis of the deficiencies of the current DGAs(detector generating algorithm) with single affinity matching

and to solve the low quality of detectors

this paper proposes an improved DGA using mix-matching rules: hamming whole matching and R-contiguous matching in each segment

named MMNS(Mix-matching Negative Selection).And the algorithm is analyzed as well.These experiments show that

the algorithm model can efficiently generate the needed detectors

evidently enhance the detection rate ...