Abstract: The partition monitoring method for concrete dam operation key parts provided by the disclosure firstly utilizes the extracted monitoring data time-frequency vector to partition the concrete dam key parts, and on this basis, obtains time series measurement data of different types of monitoring instruments with high temporal and spatial correlation, so as to establish a graph structure. Then, the dependence of time dimension and variable dimension of multivariate time series data is captured, and the relationship between further learning and representation of graph attention network is provided. Furthermore, the final feature representation of time series measured data is obtained, and finally the anomaly score is calculated through the final feature representation to detect anomalies. The complementary mutual verification of multiple measuring points of monitoring instruments with various types is realized. The structural integrity and spatial distribution law of concrete dams are fully embodied.

Abstract: The present invention discloses a PTT service system and method thereof. The system includes a user terminal equipment, an application server, a control equipment and a gateway equipment, in which, the user terminal equipment connects with said application server, control equipment and gateway equipment by access network; the application server connects with said access network and control equipment for building lists of users groups and relating information and storing and managing them; the control equipment provides establishment of signaling messages for the user terminal equipment, distributes them to other terminal equipment within group, and controls the gateway equipment; the gateway equipment sets up media stream with the user terminal equipment based on signaling of the control equipment, and distributes the media stream sent by users having a right of speaking to other users within the group.