1 Subjects: “...pumped storage units (PSUs)...”

2 Subjects: “...unit weight...”

3 Subjects: “...United States...”

4 Subjects: “...natural units...”

5 Subjects: “...storage unit...”

6 Subjects: “...functional unit...”

7 Subjects: “...energy storage units...”

8 Subjects: “...graphics processing unit computing...”

9 Subjects: “...Farnsworth Unit...”

10 Subjects: “...graphics processing unit computing...”

11 Subjects: “...gated recurrent units...”