README.md

The Ripple-Spreading Algorithm for the Shortest Path Problem

Reference: Hu X B, Wang M, Leeson M S, et al. Deterministic agent-based path optimization by mimicking the spreading of ripples[J]. Evolutionary Computation, 2016, 24(2): 319-346.

Variables	Meaning
network	Dictionary, {node1: {node2: length, node3: length, ...}, ...}
source	The source node
destination	The destination node
nn	The number of nodes
neighbor	Dictionary, {node1: [the neighbor nodes of node1], ...}
v	The ripple-spreading speed (i.e., the minimum length of arcs)
t	The simulated time index
nr	The number of ripples - 1
epicenter_set	List, the epicenter node of the ith ripple is epicenter_set[i]
path_set	List, the path of the ith ripple from the source node to node i is path_set[i]
radius_set	List, the radius of the ith ripple is radius_set[i]
active_set	List, active_set contains all active ripples
Omega	Dictionary, Omega[n] = i denotes that ripple i is generated at node n

Example (RSA4SPP.py)

if __name__ == '__main__':
    test_network = {
        0: {1: 62, 2: 44, 3: 67},
        1: {0: 62, 2: 32, 4: 52},
        2: {0: 44, 1: 33, 3: 32, 4: 52},
        3: {0: 67, 2: 32, 4: 54},
        4: {1: 52, 2: 52, 3: 54}
    }
    source = 0
    destination = 4
    print(main(test_network, source, destination))

Output: [0, 2, 4]

The RSA.py was written in class.