Abstract: Disclosed are an advanced persistent threat (APT) detection method and system based on a continuous-time dynamic heterogeneous graph network (CDHGN). The method includes: selecting network interaction event data, extracting entities from the network interaction event data as source nodes and target nodes, extracting an interaction event occurring between a source node and a target node as an edge, and determining a type and an attribute of a node, a type and an attribute of the edge, and a moment at which an interaction event occurs, to obtain a continuous-time dynamic heterogeneous graph; converting each type of edge in the continuous-time dynamic heterogeneous graph into a vector by a CDHGN encoder, to obtain an embedding representation by a CDHGN decoder to obtain a detection result of whether each type of edge is an abnormal edge, to intercept an APT attack.

Abstract: Options are displayed on a user interface that provides a network service, a selection instruction of a user is received, and an option selected by the user is acquired according to the selection instruction; the option selected by the user is recorded; and an advertisement that matches the option is queried for, and the advertisement is presented to the user.

Abstract: Options are displayed on a user interface that provides a network service, a selection instruction of a user is received, and an option selected by the user is acquired according to the selection instruction; the option selected by the user is recorded; and an advertisement that matches the option is queried for, and the advertisement is presented to the user.

Abstract: A medium information displaying apparatus located at a terminal device and a medium information playing apparatus located at a network side. The terminal device searches display positions of a display medium, obtains identification information of at least one display position, sending an information playing request to a network side after adding the obtained identification information into the information playing request. The network side obtains the identification information in the information playing request, searches for display data corresponding to the at least one display position, sends an information playing response to the terminal device after adding the identification information and the display data into the information playing response. The terminal device displays medium information on the display position of the display medium according to the display data corresponding to the at least one display position.