A charging control circuit includes a charging module, a switch element, a load detecting element, and an adjusting element. Deployment pattern matching is further implemented by accessing a realization pattern that captures deployment parameters relating to resources and resource-resource relationships of a deployment of interest and expressing the realization pattern as a pattern graph defined by conceptual resource elements and constraints arranged by resource-to-resource relationship links and constraint links. The breathing hole has a cover side opening, which connects to an accommodation side opening of the communication passage. Additionally, catalyst systems disclosed herein may be substantially lower in cost than current commercial catalysts.