A Modified Gray Wolf Optimizer-Based Negative Selection Algorithm for Network Anomaly Detection

Figure 4

Nonboundary detector generation. The small circle represents self-antigen, and the small triangle represents non-self-antigen. D1–D3 represent the original detector, represents the new detector, represents the center of a new detector, and represents the radius of a new detector. d1 and d2 represent the distance from the new detector to cluster center of the self-sample. r1 and r2 represent cluster radius. c1 and c2 represent the cluster center.