| HAR | Human activity recognition |
| DCS | Discrete cuckoo searching |
| DPSO | Discrete particle swarm optimization |
| DFA | Discrete firefly algorithm |
| DPSO | Discrete particle swarm optimization |
| ID-CS | Improved discrete particle swarm optimization |
| HAR | Human activity recognition |
| DCS | Discrete cuckoo searching |
| DPSO | Discrete particle swarm optimization |
| DFA | Discrete firefly algorithm |
| DPSO | Discrete particle swarm optimization |
| ID-CS | Improved discrete particle swarm optimization |