The display device includes a display component, a storage component, and a processing component. In the electrolyte for a redox flow battery, the total concentration of platinum-group element ions is 4. The insulating body has an opening positioned between the conductors and adapted to receive a sensor such that a portion of the sensor is subjected to the electric field. The supporting tool has two supporting members, which extend in the vertical direction. A comparison between the two temperatures represents a risk of misting of the window. The scores from both the mutually exclusive and overlapping subdocuments are used in ranking the relevance of documents to a query.