11results about How to "Speed maximization" patented technology

The invention discloses an unmanned aerial vehicle intelligent metasurface-assisted satellite-ground physical layer secure transmission method and system, and the method comprises the steps: constructing a signal transmission model based on a communication system, and obtaining the instantaneous signal to interference plus noise ratio of a communication terminal and the instantaneous and secure rate of the system; forming a transmission optimization problem model which jointly optimizes a satellite base station transmitting precoding matrix, a satellite-borne passive intelligent metasurface phase shift matrix, an airborne active intelligent metasurface diagonal reflection matrix and an unmanned aerial vehicle track and takes maximization of the average and safety rate of the system as a target; through analysis of a problem structure, a solution framework of hierarchical processing is provided, and a transmission signal and intelligent metasurface reflection are respectively processed by using successive convex approximation, penalty-based manifold optimization and a positive semidefinite programming algorithm in an inner layer; an unmanned aerial vehicle flight path algorithm based on depth deterministic strategy gradient is adopted at the outer layer to obtain the optimal flight path design, and the eavesdropping is effectively inhibited and the safety performance of the satellite-ground communication system is improved by cooperating with the optimization solution of the inner and outer layer problems.

An electrode assembly folding apparatus according to one embodiment of the present disclosure includes: a supply unit for supplying the electrode assembly that comprises two sheet-shape separators, a second electrode continuously located between inside surfaces of the separators facing each other, and a first electrode alternately located up and down on outside surfaces of the two separators, wherein a first unit body and a second unit body are alternately connected to each other, and wherein the first electrode of the first unit body is located at an upper side and the first electrode of the second unit body is located at a lower side, a holding unit that holds the first unit body supplied from the supply unit and transfers it through a swing motion, thereby folding the electrode assembly in a zigzag shape, and a stack unit that stacks the first unit body transferred by the holding unit.

An electrode assembly folding apparatus for folding an electrode assembly in a zigzag shape according to one embodiment of the present disclosure includes: a supply unit for supplying the electrode assembly that comprises two sheet-shaped separators, a second electrode continuously located between inside surfaces of the separators facing each other, and a first electrode alternately located up and down on outside surfaces of the two separators, wherein a first unit body and a second unit body are alternately connected to each other, wherein the first electrode of the first unit body is located on an upper side and the first electrode of the second unit body is located on a lower side, a holding unit that holds and transfers the first unit body supplied from the supply unit, and a stack unit that stacks the first unit body transferred by the holding unit.

The invention discloses a method and a computer program product for eliminating interference in ocean communication. The method comprises the following steps: constructing a target function based on a maximum average realizable sum rate criterion; carrying out fractional programming simplification on the target function; processing the objective function which is simplified through fractional programming by utilizing an alternating optimization algorithm to obtain an objective function which is optimized alternately; using a continuous convex approximation algorithm to convert the alternately optimized objective function to obtain a converted objective function, and solving the converted objective function to obtain an optimal solution of the optimization parameter; and dynamically adjusting the system parameters of the communication and inductance integrated system by using the optimal solution of the optimized parameters so as to eliminate signal interference among users of the communication and inductance integrated system. According to the method and the device, the communication and sensing performance can be improved while the maximization of the user rate is ensured, and the interference of multiple users is reduced. In addition, the accuracy and the robustness of the optimal solution can be improved, so that the performance of the communication and inductance integrated system can be improved.

The invention relates to user access and power distribution based on cooperative transmission in an indoor multi-color VLC-NOMA network, and belongs to the technical field of optical communication. According to the method provided by the invention, the maximum network sum rate is realized and the user fairness is improved by optimizing user access and power distribution. In the user access stage, a user access algorithm based on an improved matching game is adopted, and the cooperation and access relation between users and APs in the indoor multi-color VLC-NOMA network is determined; in the power distribution stage, a power distribution algorithm based on improved raccoon optimization is adopted, and a power distribution factor matrix of each NOMA user group is updated through hunting, escape and population reconstruction methods so as to optimize the transmitting power of the AP. According to the method provided by the invention, the problems of inter-cell interference, load imbalance among APs and low communication quality of edge users caused by dense deployment of APs and multi-user access in the indoor multi-color VLC-NOMA network can be improved, and the network speed and the user fairness are improved.

The present invention discloses a resource optimization method and system for a drone-assisted data transmission network, including: establishing a joint optimization problem P1 based on the traversal reachable rate #imgabs0##imgabs1# and the bandwidth allocation coefficient η; optimizing and solving the joint optimization problem P1 to obtain the noise compression covariance matrix Ω of the drone * And the corresponding bandwidth allocation coefficient η * ; According to the bandwidth allocation coefficient η * The data transmission network bandwidth is divided according to the noise compression covariance matrix Ω * Design the compression noise of the drone; establish the joint optimization problem P2 based on the traversal reachable rates #imgabs2# and #imgabs3#; use the gradient descent algorithm to solve the joint optimization problem P2 and obtain the power allocation vector p of the ground AP * And the noise compression covariance matrix Q * ; According to the power allocation vector p * and noise compression covariance matrix Q * Design the power allocation and compression noise of ground APs; effectively improve the collection efficiency of sensor data and the utilization rate of system spectrum resources.

This invention discloses a method for optimizing the neutral rate in an MA-assisted RSMA-RIS system. The method first presents an algorithm for updating the position of the movable antenna (MA), and then provides an algorithm for obtaining the optimal system neutral rate based on AO iteration. This invention can solve the problems of precoding design, antenna position, RIS reflection matrix design, and common rate partitioning scheme design in MA-assisted multi-user downlink RSMA-RIS systems. It obtains the optimal solution for the system neutral rate through iteration and can quickly converge to the optimal solution.

The invention discloses a method for designing a secure transmission scheme in a rate division multiple access system, which aims at a scene that part of messages sent to users need to be kept secret among the users, only non-confidential messages are transmitted in a public stream, and the non-confidential messages and confidential messages are transmitted in a time-sharing manner in a private stream. On the premise of ensuring the confidential message transmission rate, joint optimization is carried out on precoding vector sending, rate segmentation, private stream non-confidential and confidential message transmission duration distribution and the like of each message stream, and non-confidential message transmission and rate are maximized. In the optimization problem solving process, an original optimization problem is decomposed into two layers of optimization problems, and then the decomposed optimization problems are converted and solved through binary search, slack variables, continuous convex approximation and other methods. Simulation results show that compared with comparison schemes such as rate division multiple access, time-sharing space division multiple access and the like that private streams only transmit confidential messages, the scheme provided by the invention can obtain a higher non-confidential message transmission rate.

The application provides a distributed RIS cooperation channel estimation and interference management method and system, and belongs to the technical field of channel estimation and interference management. The application combines a distributed timing pilot architecture, a history data driven minimum mean square error Wiener filter interpolation technology based on strict causality, a weighted minimum mean square error iterative collaborative optimization algorithm using spatial diversity, and a Kalman filter algorithm prediction closed-loop control mechanism assisted by a deep learning neural network. Especially for a super large scale multiple input multiple output system, the application can adaptively process the spatial non-stationary characteristics of the array in channel estimation and beamforming optimization, and realizes joint resolution enhancement in the angle domain and the distance domain based on a near-field spherical wave channel model, thereby providing a set of logically rigorous, mathematically complete and engineering implementable channel acquisition and interference management overall patent solution for future 6G large-scale network deployment.

The invention relates to the field of offshore wind power management, in particular to a wind power plant area monitoring and early warning method and system based on multi-source information fusion, and the system comprises a submarine cable monitoring module and a power plant monitoring module, the submarine cable monitoring module is used for monitoring the state of submarine cables, delimiting a submarine cable protection area, and evaluating the operation risk of the submarine cables; the submarine cable overall insulation performance diagnosis module is used for monitoring all ship signals passing through a submarine cable protection area and establishing a submarine cable overall insulation performance diagnosis standard based on optical fiber temperature rise, and the power plant monitoring module is used for monitoring and adjusting the power generation state of a wind driven generator. The optical fiber characteristic information under typical fault types and fault development degrees is extracted, meanwhile, the safety performance of a generator is guaranteed, the wind energy utilization efficiency is optimized, it can be guaranteed that power transmission of a wind power plant is not affected by external factors, submarine cables are prevented from being damaged by ships and air temperatures, and remote monitoring and recognition of submarine cable monitoring targets are completed.

A building automation system (306) for controlling conditions of a room (310) is described. The building automation system (306) includes room devices (328-332), a first interface (322), a second interface (324), and a management device (e.g., 404-408). The first interface (322) receives a voice command based on a voice utterance detected by a voice-enabled system (302, 304) in the room (310). The second interface (324) receives a hospitality user profile from a hospitality information system (308). The hospitality user profile identifies one or more user parameters associated with the room (310). The management device of the building automation system (306) includes a guest room profile that identifies one or more room parameters associated with the room (310). The management device controls the room devices (328-332) based on the voice command, the hospitality user profile, and the guest room profile.