To cope with the extensive structural damage or even collapse of the networks caused by a minor fraction of edge failures in edge-coupled interdependent networks,this paper proposes a cascading failure repair model for edge-coupled interdependent networks based on mutual boundary edges,dynamically integrating the repair process with the cascading failure process.And according to the features of edge-coupled network,a selective repair strategy based on compound excessive degree(SRCED)and an improved SRCED(ISRCED)are introduced.Simulation studies on Erdős-Rényi random network(ER-ER)and scale-free network(SF-SF)edge-coupled interdependent networks are conducted under random failure and deliberate attacks.Comparative analysis with the randomly repair strategy(RR)and the select-ive repair strategy based on edge betweenness(SREB)is performed to find the optimal repair strategy.The research re-veals that the optimal repair strategy in different structured edge-coupled interdependent networks changes depending on the initial edge retention ratio and the type of failure.Moreover,the repair strategy,capable of restoring the network to its initial state at a higher initial attack ratio of edges,does not necessarily have the least number of iterations.
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