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

2 Subjects: “...physical internet...”

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

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

5 Subjects: “...Internet...”

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

7 Subjects: “...Industrial Internet...”

8 Subjects: “...Internet of Energy...”

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

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

11 Subjects: “...energy internet...”

12 Subjects: “...energy internet...”

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