Abstract: An active edge caching method based on community discovery and weighted federated learning for selecting an optimal caching user and developing an optimal caching strategy; user grouping method based on community discovery is first provided, users are divided into different user groups according to users' mobility and social attributes, degrees of importance of different users are computed in each user group, and most important user is selected as a caching node to provide content distribution services; a content popularity prediction framework based on attention weighted federated learning is provided for combining attention weighted federated learning mechanism with deep learning algorithm to predict future user preferences for different content, so as to improve content popularity prediction accuracy and solve user privacy disclosure; finally, hot content is cached on selected caching users according to prediction results, to achieve goals of reducing network transmission latency and network operation cost

Abstract: A device for manufacturing a storage container by integrally winding multiple bundles of fibers in a double-layer spiral circumferential direction. The device includes a rotary drive unit and two radial slide drive units provided at two sides of the rotary drive unit, each of the two radial slide drive units is provided with several spiral winding guide wire tubes in a circumferential array and drives the spiral winding guide wire tubes to perform a radial telescopic movement, the rotary drive unit drives the spiral winding guide wire tubes on the two radial slide drive units to perform a rotation movement, the rotary drive unit is connected to the two radial slide drive units by means of brackets, and a rack plate is connected to one side of each of the two radial slide drive units away from the rotary drive unit.

Abstract: Disclosed are an electronic trading method and system, and a payment platform system. The electronic trading system comprises a merchant trading system used by a merchant, a trading gateway, a bank system, a payment gateway and a payment platform system. The merchant trading system comprises a terminal used by a user and a merchant trading server. The payment platform system communicates with the merchant trading system via the trading gateway and communicates with the bank system via the payment gateway. The payment platform system is configured to receive an agreement deduction request sent from the merchant trading system, to verify the agreement deduction request, and to communicate with the bank system so as to perform a deduction according to the agreement deduction request and a predetermined payment deduction agreement after the agreement deduction request passes verification.