Not all gas diffusion structures known to date can guarantee water balance compensation in the fuel cell, protection against drying and prevention of water deposits while simultaneously ensuring even distribution of reaction gases. The equalizer equalizes a detection signal obtained by detecting a transmission signal with periodically inserted known symbol patterns made up of at least one symbol. The organic molecular film includes holes penetrating in a thickness direction thereof. The energy management system is configured to communicate with the intelligent device regarding the energy demand to coordinate scheduling of energy distribution during the operation.