Although more than 100-kilometer-long tunnel structures are considered in many areas including the Taiwan Strait, the risk challenges of long tunnels, including sabotage / terrorism, need be concerned accordingly. Hence, establishing SCADA networks with distributed intelligence and real-time fault-tolerance mechanism is worthwhile for long tunnels. Besides, the dual-surveillance system can be featured with better functionality just as the human beings can have better vision by two eyes instead of by one in addition to node fault-tolerance. For professionals' interest, the features of the bipartite GHT network are proofed with graphs: GHT(m,n,0) / GHT(m,n,n/2) is 1-edge hamiltonian if n4, and GHT(m,n,0) / GHT(m,n,n/2) is 1p-hamiltonian if and only if either n≥6 or m = 2 and n≥4. Therefore, the proposed GHT-SCADA network prototypes can be dual-surveillance based, with optimal degree (3 connected links to a node) and have both nodes' and links' fault-tolerance as well as a mechanism supporting orderly inspection and maintenance. Such reliable SCADA networks are not only for preventing disasters, but also actively for best judgment and control of incidents in tunnels.
- Generalized honeycomb torus (ght)
- Honeycomb rectangular torus (hret)
- Intelligent transportation systems (its)
- Supervisory control and data acquisition (scada)