Abstract: The disclosure discloses a point-of-interest recommendation method based on a temporal knowledge graph. Based on the historical behavior trajectory of the user and multimodal information, the disclosure constructs a dynamic temporal knowledge graph and a static group knowledge graph, which are used to learn interest preferences of the user that change over time and stable features that do not change over time, respectively. At the same time, the disclosure uses deep learning methods to build a point-of-interest recommendation model, which can extract a point-of-interest fusion feature representation and a user fusion feature representation from the two knowledge graphs in combination with a user review sentiment embedding sequence to accurately predict a point of interest most likely to be visited by the target user at a next moment. The disclosure has the characteristics of high precision and strong scalability, and can provide support for personalized user behavior trajectory prediction.

Abstract: A collector device of an electric train and a collector method thereof are provided. The collector device includes a collector unit and a magnetic unit. The collector unit has a first side, a second side and a graphite skateboard. The first side and the second side are the two opposite sides of the collector unit, and the graphite skateboard is disposed on the first side, wherein the first side of the collector unit is in contact with a power source having a magnetically permeable capacity via the graphite skateboard, so as to draw an operation voltage. The magnetic unit has an electromagnetic coil body. The magnetic unit is configured on the second side of the collector unit, for providing an attractive force between the collector unit with the power source, so as to reduce a contact loss rate.

Abstract: A collector device of an electric train and a collector method thereof are provided. The collector device includes a collector unit and a magnetic unit. The collector unit has a first side, a second side and a graphite skateboard. The first side and the second side are the two opposite sides of the collector unit, and the graphite skateboard is disposed on the first side, wherein the first side of the collector unit is in contact with a power source having a magnetically permeable capacity via the graphite skateboard, so as to draw an operation voltage. The magnetic unit has an electromagnetic coil body. The magnetic unit is configured on the second side of the collector unit, for providing an attractive force between the collector unit with the power source, so as to reduce a contact loss rate.

Abstract: A method for controlling the operating frequency of a processor during video playback is disclosed. The method comprises extracting a pack of video data in which is embedded a plurality of data size information of a plurality of video data segments for playback. The plurality of data size information from the extracted pack of video data is read to determine the plurality of video data segment bitrates. The plurality of video segment bit rate is calculated from the plurality of data size information of the plurality of video data segments. The operating frequency of the processor is set according to the video data segment bitrate of each video data segment of the plurality of video data segments while playing the video data segment. As a result, the optimum processor operating frequency is utilized in order to provide the best quality of video playback while reducing the power consumption to a minimum.