3results about How to "Avoid collusion" patented technology

This invention relates to the fields of federated learning and cryptography, specifically to a secure three-party aggregation method for federated learning in the Industrial Internet of Things (IIoT). The method includes an initialization phase, a training phase, an online phase, and a verification phase. By setting up an architecture with one honest server and two aggregation servers, each server receives a portion of the secret share of local model gradient parameters sent by various IoT devices, thus protecting the privacy of local data. The honest server assists the two aggregation servers in interactively executing a three-party weight calculation protocol to calculate the secret share of the aggregation weights. They also interactively execute a three-party multi-weight aggregation protocol to calculate the secret share of the gradient parameters of the current aggregation model. Furthermore, a linear homomorphic hashing method is used to verify the correctness of the gradient parameters of the current aggregation model. This method solves the problems of low efficiency, weak security, and low robustness in federated learning during model training and aggregation, and can promote data flow and utilization in IoT scenarios.

The invention relates to the technical field of production of vacuum insulated panel core materials, in particular to a preparation method of a vacuum insulated panel core material, which comprises the following steps: cutting raw materials by using an airflow feeding type section cutting machine, opening and mixing filaments, carding to form a net, laying the net to form a felt, hot-pressing and shaping, and cutting. According to the preparation method provided by the invention, a dry process is adopted, so that severe hydraulic shearing and mechanical friction damage to fibers caused by wet pulping are avoided; the step of cutting off the raw materials is carried out by adopting the airflow feeding type section cutting machine, the to-be-cut ends of the glass fiber filaments are downwards suspended in a discharging cavity and are attached to structures such as a second feeding roller by utilizing airflow before cutting, cutting point drifting caused by curling and bending of the fibers is effectively avoided, and the cutting efficiency is improved by being matched with cutting of a cutting knife. The length of the short cut filaments is strictly controlled within a required range, the length distribution of the short cut filaments is concentrated, and the problem that the pore uniformity of the core material and the stability of the heat insulation performance of a final product are affected due to non-uniform length of the short cut fibers is solved.

The invention provides an auction transaction method and device and related equipment, and is applied to a first node, and the method comprises the steps: transmitting a public key of the first node to a second node under the condition that the second node participates in an auction application request for an auction transaction issued by a third node; receiving first information sent by the second node for the auction transaction, wherein the first information comprises first ciphertext information; under the condition that the first ciphertext information is decrypted to obtain bidding information, second information is sent to a third node, and the second information comprises second ciphertext information of the bidding information and a public key of the first node; receiving third information sent by a third node, wherein the third information comprises third ciphertext information obtained by encrypting the auction price information by the third node based on the public key of the first node; and fourth ciphertext information is sent to the second node, the fourth ciphertext information comprises ciphertext information of a first auction result of the auction transaction, and the first auction result is determined by the first node based on the auction price information.