1 Subjects: “...unmanned surface vehicle...”

2 Subjects: “...vehicle electrification...”

3 Subjects: “...unmanned aerial vehicles...”

4 Subjects: “...unmanned aerial vehicles...”

5 Subjects: “...unmanned aerial vehicles...”

6 Subjects: “...unmanned aerial vehicles...”

7 Subjects: “...vehicle routing problem...”

8 Subjects: “...unmanned aerial vehicle (UAV)...”

9 Subjects: “...unmanned aerial vehicle (UAV)...”

10 Subjects: “...plug-in electric vehicle...”

11 Subjects: “...electric vehicles (EVs)...”