. 2020 Nov 26;28(2):1177–1195. doi: 10.1016/j.sjbs.2020.11.067

Table 6.

Example COVID-19 fuzzy system rules.

Fuzzy Rules (IF-THEN rules) – relationship between inputs and output
If (Industrial City (Air-Pollution) is High) and (Population-density is High) and (Weather-temperature is Medium) and (Mean-sea-level is Medium) then (Recover (Cases) is High) (1) If (Industrial City (Air-Pollution) is High) and (Population-density is Medium) and (Weather-temperature is Medium) and (Mean-sea-level is Medium) then (Recover (Cases) is Low) (1) If (Industrial City (Air-Pollution) is High) and (Population-density is Low) and (Weather-temperature is Medium) and (Mean-sea-level is Low) then (Recover (Cases) is Low) (1) If (Industrial City (Air-Pollution) is Low) and (Population-density is Medium) and (Weather-temperature is Medium) and (Mean-sea-level is High) then (Recover (Cases) is Low) (1) If (Industrial City (Air-Pollution) is High) and (Population-density is Medium) and (Weather-temperature is Medium) and (Mean-sea-level is High) then (Recover (Cases) is Low) (1) If (Industrial City (Air-Pollution) is Low) and (Population-density is Low) and (Weather-temperature is Medium) and (Mean-sea-level is High) then (Recover (Cases) is Low) (1)

Fuzzy Rules (IF-THEN rules) – relationship between inputs and output

If (Industrial City (Air-Pollution) is High) and (Population-density is High) and (Weather-temperature is Medium) and (Mean-sea-level is Medium) then (Recover (Cases) is High) (1) If (Industrial City (Air-Pollution) is High) and (Population-density is Medium) and (Weather-temperature is Medium) and (Mean-sea-level is Medium) then (Recover (Cases) is Low) (1)
If (Industrial City (Air-Pollution) is High) and (Population-density is Low) and (Weather-temperature is Medium) and (Mean-sea-level is Low) then (Recover (Cases) is Low) (1)

If (Industrial City (Air-Pollution) is Low) and (Population-density is Medium) and (Weather-temperature is Medium) and (Mean-sea-level is High) then (Recover (Cases) is Low) (1) If (Industrial City (Air-Pollution) is High) and (Population-density is Medium) and (Weather-temperature is Medium) and (Mean-sea-level is High) then (Recover (Cases) is Low) (1)

If (Industrial City (Air-Pollution) is Low) and (Population-density is Low) and (Weather-temperature is Medium) and (Mean-sea-level is High) then (Recover (Cases) is Low) (1)