Abstract: A weakly coupled enhanced graphene film includes an enhanced graphene structure based on weak coupling, wherein the enhanced graphene structure based on weak coupling comprises a plurality of graphene units stacked vertically; the graphene unit is a single graphene sheet, or consists of two or more graphene sheets stacked in AB form; two vertically adjacent graphene units are weakly coupled, to promote the hot electron transition and increase the joint density of states, thereby increasing the number of hot electrons in high-energy states; the stacking direction of the graphene units in the graphene structure is in the thickness direction of the graphene film; and the graphene film enhances the accumulation of hot electrons in high-energy states by the enhanced graphene structure based on weak coupling.

Abstract: A method and an apparatus for classifying users. The method includes establishing sub-lists in a stored user list of a user according to information of pre-set regions, receiving user location information uploaded by a user terminal of a user, obtaining all user lists that include the user; moving the user in each of the user lists into a sub-list in the user list corresponding to the location of the user; receives a pulling request from a user, obtains information of sub-lists in a user list of the user, sends the information of the sub-lists to the user terminal of the user via a pulling response to enable the user terminal to display users according to the information of the sub-lists received.