4results about How to "High cost" patented technology

This invention discloses a device type identification method, terminal device, and storage medium based on traffic sampling. It eliminates the need to collect complete device traffic data; device identification is achieved simply by sampling traffic at the gateway. To address the issue of missing traffic features, traditional tensor imputation algorithms learn the embeddings corresponding to tensor rows, columns, and depths, but cannot generalize to unknown rows, columns, or depths. This results in repeated retraining, time-consuming and costly feature imputation. This invention proposes an inductive tensor imputation method that utilizes historical information to learn and generate embedding functions, enabling fast and effective device traffic feature imputation.

This application discloses a ciphertext processing method and system, relating to the field of encrypted privacy computing technology. The method includes: a client quantizing the vector to be matched, directly encoding the coefficients, and encrypting and uploading the query ciphertext; a server constructing a self-isomorphic base ciphertext and recombining it to obtain a dimension-wise query ciphertext, which is then subjected to homomorphic multiplication and addition inner product operations with the template ciphertext to obtain an encrypted score block; a returned ciphertext block is obtained by superimposing a channel-aligned random mask, and the masked score share is obtained through decryption by the authentication / decision side; a security threshold comparison is performed by combining complementary shares, and the result is output. In this scheme, the client only uploads a single ciphertext, and the server performs dimensional splitting, eliminating the need for multi-packet transmission and significantly reducing communication overhead; homomorphic inner product matching is achieved through ciphertext computation links, reducing redundant computations and effectively reducing homomorphic computation losses; and the leakage of plaintext similarity information is shielded through random mask encryption and collaborative verification of dual-end score shares, enhancing privacy protection capabilities.

The application relates to a motion path planning method and device of a mechanical arm in an evaporator water chamber. The method comprises the following steps: under the condition that a robot does not collide with an inner wall of the water chamber and the minimum distance between the robot and the inner wall of the water chamber is greater than a preset safety distance, determining a neighborhood centering on a first node; for each adjacent node in the neighborhood, determining the path cost of the adjacent node according to the first distance corresponding to the node group of the path of the adjacent node, the second distance between the adjacent node and the first node, the minimum distance at each node on the path and the minimum distance at the first node; and based on the path cost of each adjacent node, determining the parent node of the first node from the adjacent nodes to plan the motion path of the mechanical arm. The motion path not only tends to be the shortest, but also ensures that the distance between the robot and the inner wall of the water chamber is relatively large, so that the mechanical arm does not collide during the installation operation of the blocking plate in the evaporator water chamber.

This application provides a radio frequency (RF) device and its inductor. The RF device includes a power amplifier circuit, a signal coupling circuit, an extraction circuit, and a harmonic filter circuit. The power amplifier circuit amplifies a differential signal to output a signal to be filtered. The signal coupling circuit includes a primary inductor and a secondary inductor. The signal coupling circuit receives the signal to be filtered through the primary inductor and outputs a single-ended signal from the secondary inductor. The extraction circuit has a center tap. The extraction circuit couples with the primary inductor and outputs a common-mode signal from the center tap. The harmonic filter circuit performs harmonic filtering on the single-ended signal based on the common-mode signal, so that the secondary inductor of the signal coupling circuit outputs a filtered signal.