Abstract： The Bak-Sneppen evolution model is generalized in terms of a new concept and quantity, interaction strength. Based on a quantitative definition, the interaction strength describes the strength of the interaction between the nearest neighbouring individuals in the model. Self-organized criticality is observed for the generalized model with ten different values of interaction strength. The gap equation governing the self-organization is derived. It is also found that the self-organized threshold depends on the value of the interaction strength.
LI Wei;CAI Xu. Interaction Strength and a Generalized Bak-Sneppen Evolution
Model[J]. 中国物理快报, 2002, 19(10): 1420-1423.
LI Wei, CAI Xu. Interaction Strength and a Generalized Bak-Sneppen Evolution
Model. Chin. Phys. Lett., 2002, 19(10): 1420-1423.
2002, Vol. 19 
