list of cryptocurrencies Top Knowledge graph

1. Monitoring requirements in a wide areaUnmanned technology: coastal defense, islands and frontier defense's new help to defend the motherland.

2. Security and confidentiality issues2. Security and confidentiality issues2. Security and confidentiality issues

Third, the challenges and countermeasures of unmanned technology applied to coastal defense islands and border defense2. Security and confidentiality issues3. Unmanned shops, hotels and banks: the service guarantee of frontier islands.