1 Subjects: “...Internet-of-Things...”

2 Subjects: “...physical internet...”

3 Subjects: “...Internet of Things...”

4 Subjects: “...Internet of Digital Triad Things (IoDTT)...”

5 Subjects: “...industrial internet of things...”

6 Subjects: “...Industrial Internet of Things...”

7 Subjects: “...energy internet...”

8 Subjects: “...energy internet...”

9 Subjects: “...Internet of things (IoT)...”