With the increase of n, the size of the valve island increases due to more connections between chambers.
①N=1: DIDO and EEAR are optional for actuation
②1<=N<5: The portability and actuation performance of IEAR are better than DIDO and EEAR
③5<=N<6: Compared with DIDO, the complication of IEAR is larger than DIDO but with better performance. The portability and actuation performance of IEAR are better than EEAR.
④N>=6: The complication of IEAR is larger than DIDO and EEAR but with better performance.
For N>=6, soft valves integrated into soft circuits can compose a compact valve island, which might further widen the application of IEAR under complicated conditions.