However the investigation into history of logical diagrams, especially from Euler Diagrams to Venn Diagrams to Existential Graphs and Conceptual Graphs, suggests that they have reached a more extensive and deeper significance rather than being confined within its pedagogical role.

To overcome the defect of long-time calculation and memory consuming in the current method of existence probability map for detecting circles,the present study first made sure the potential range of the center of circle,and stored the message which met the required numerical values in the chain and then decided the pa.