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公开(公告)号：US20230344138A1
公开(公告)日：2023-10-26
申请号：US18305339
申请日：2023-04-22
申请人： Xidian University
发明人： Yiqun Zhang , Shunchang Liu , Jianguo Cai , Meng Li , Yiduo Quan , Zihan Sun , Peng Cao , Zhiyuan Li
CPC分类号： H01Q15/168 , H01Q1/42
摘要： A deployable mesh antenna based on dome-type tensegrity includes: a wire mesh reflector, a dome-type reflector support system, and a peripheral deployable truss which are coaxially arranged; the peripheral deployable truss includes: a annular main rod and end-to-end truss units disposed on the main rod; an outermost cable boundary of the dome-type reflector support system is fixedly connected to the peripheral deployable truss, and the dome-type reflector support system includes: an inner strut ring, an outer circumference of the inner strut ring is connected to radial rib units, each radial rib unit is arranged at a radial direction of the inner strut ring, and the radial rib units are connected through hoop cables; the wire mesh reflector is covered on the dome-type reflector support system to form a parabolic structure, the wire mesh reflector is petal-shaped, and the wire mesh reflector has a grid structure.
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82.发明授权公开(公告)号：US11764457B2
公开(公告)日：2023-09-19
申请号：US17788587
申请日：2021-06-09
申请人： XIDIAN UNIVERSITY
摘要： This invention proposes a reflective surface antenna based on a triple telescopic rod drive and quasi-geodesic grid structure, including a supportive back frame, a reflective surface frame, a vertical connecting rod, a primary reflective surface, an auxiliary reflective surface, a radial support rod, a feed source, and an attitude control device. The supportive back frame and reflective surface frame have a paraboloidal truss structure. The primary reflective surface is fixed on the quasi-geodesic grid of the reflective surface; the auxiliary reflective surface is fixed at the focal point of the primary reflective surface; the feed source is fixed at the apex of the reflective surface; and the attitude control device includes a base and a telescopic rod.
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83.发明授权公开(公告)号：US11757786B2
公开(公告)日：2023-09-12
申请号：US17338718
申请日：2021-06-04
发明人： Jie Feng , Qingqi Pei , Peixin Yue
IPC分类号： H04L12/873 , H04L47/52 , H04L5/00 , H04N21/647 , H04W72/0453
CPC分类号： H04L47/522 , H04L5/0098 , H04N21/647 , H04W72/0453
摘要： A method for joint optimization of resource allocation includes: obtaining network data volumes of two services; obtaining queue statuses at a time t; computing sub-channel slices; computing a local CPU speed scaling, a user association, a sub-carrier assignment, and a power allocation of service 1; computing a user association, a video quality decision, and a sub-carrier assignment of service 2; obtaining an initial sub-carrier assignment and an initial power allocation; obtaining the user association; obtaining the power allocation and the sub-carrier assignment of service 1; obtaining the video quality decision; obtaining the sub-carrier assignment of service 2; obtaining an optimal data transmission rate and the user association to obtain a data rate allocation; and obtaining an optimal CPU speed scaling, an optimal user association, an optimal sub-carrier assignment, an optimal power allocation, an optimal video quality decision and an optimal sub-channel allocation.
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公开(公告)号：US20230162402A1
公开(公告)日：2023-05-25
申请号：US17919136
申请日：2020-04-14
摘要： A method for encoding and decoding, an encoder and decoder for a point cloud. The method for encoding a point cloud to generate a bitstream of compressed point cloud data, in which the point cloud's geometry is represented by an octree-based structure with a plurality of nodes having parent-child relationships by recursively splitting a volumetric space containing the point cloud into sub-volumes each associated with a node of the octree-based structure, includes: determining an occupancy pattern for a parent node based on the occupancy of its child nodes; determining a planar context information for at least one of the child nodes; and entropy encoding/decoding the occupancy pattern parent node based on the determined planar context information to produce encoded/decoded data for the bitstream.
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85.发明公开公开(公告)号：US20230146215A1
公开(公告)日：2023-05-11
申请号：US17752865
申请日：2022-05-25
申请人： Xidian University
发明人： Junyu Liu , Min Sheng , Songtao Lei , Ziye Zhang , Yan Shi , Yu Su , Jiandong Li
摘要： A scene-based beam generation method for ground-to-air coverage based on convex polygon subdivision is provided and includes: obtaining a collection of base station positions by using a method of universal transverse mercator projection; constructing a three-dimensional (3D) low altitude signal coverage area; performing convex polygon subdivision on the area to be covered; and generating a beam configuration of each base station. The method realizes generation of beam configurations of base stations in the 3D low altitude signal coverage area, overcomes a problem that the existing 17 kind of scene-based beams cannot realize the coverage of 3D area, overcomes a problem of mismatch between network state information and beam configuration caused by dynamic adjustment of beam configurations. The beam configurations generated by the method does not need to obtain the number of users in real time to adjust the beam, and has a good coverage ability.
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公开(公告)号：US20230022943A1
公开(公告)日：2023-01-26
申请号：US17699201
申请日：2022-03-21
申请人： Xidian University
发明人： Yang Xiao , Chengjia Yan , Qingqi Pei
摘要： A method for defending against an adversarial sample in image classification includes: denoising, by an adversarial denoising network, an input image to acquire a reconstructed image; acquiring, by a target classification model, a predicted category probability distribution of the reconstructed image; acquiring, by the target classification model, a predicted category probability distribution of the original input image; calculating an adversarial score of the input image, and determining the input image as an adversarial sample or a benign sample according to a threshold; outputting a category prediction result of the reconstructed image if the input image is determined as the adversarial sample; and outputting a category prediction result of the original input image if the input image is determined as the benign sample. A system for defending against an adversarial sample in image classification, and a data processing terminal are further provided.
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公开(公告)号：US11509472B2
公开(公告)日：2022-11-22
申请号：US17155057
申请日：2021-01-21
申请人： XIDIAN UNIVERSITY
发明人： Changle Li , Fan Li , Yuchuan Fu , Pincan Zhao
摘要： The present disclosure discloses a method for sharing models among autonomous vehicles based on a blockchain, the method comprising the steps of: 1) creating a mobile edge computing network; 2) generating a key pair for each node in the mobile edge computing network; 3) creating a local model set of a mobile node set in the mobile node computing network; 4) enabling each mobile node to communicate with a corresponding nearest mobile edge computing node; 5) creating supernode sequences by the mobile edge computing node; 6) creating a blockchain based on the supernode sequences; and 7) updating the local model set.
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公开(公告)号：US20220319940A1
公开(公告)日：2022-10-06
申请号：US17423150
申请日：2019-12-13
申请人： XIDIAN UNIVERSITY
发明人： Chen Liu , Yuming Zhang , Hongliang LV
摘要： This disclosure provides a package structure for a semiconductor device, comprising a three-layer film consisting of a first SiO2 film, a Si3N4 film and a second SiO2 film stacked in this order, wherein the first SiO2 film is formed by a thermal oxidation process, the Si3N4 film is formed by a low pressure chemical vapor deposition process, and the second SiO2 film is formed by a low temperature atomic layer deposition process. This disclosure also provides a method for preparing the package structure for a semiconductor device.
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公开(公告)号：US11444654B2
公开(公告)日：2022-09-13
申请号：US17383581
申请日：2021-07-23
申请人： Xidian University
发明人： Wenchi Cheng , Liping Liang , Hailin Zhang
摘要： A system and method of index modulation based joint mode frequency hopping with vortex electromagnetic waves for anti-jamming are provided. The system is additionally provided with a transmit signal carrier selector that provides diversified options, a receive signal carrier selector that is strictly synchronized with the transmit signal carrier selector, and a group of fast Fourier transformation modules to output a binary demodulation signal with jamming eliminated. The method includes: binary information division; index modulation and information modulation; information loading and hopping; information transmission, de-hopping, and jamming filtering; and calculation of the jamming probability and an average bit error rate. The present disclosure combines orbital angular momentum modes and subcarrier frequencies to form OAM mode-subcarrier frequency pair sets so as to diversify information transmission carriers, and performs simultaneously modulation and hopping to increase a spectrum efficiency and enhance the anti-jamming capability.
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90.发明申请公开(公告)号：US20220237519A1
公开(公告)日：2022-07-28
申请号：US17317908
申请日：2021-05-12
发明人： Lichuan Ma , Qingqi Pei , Zijun Huang
摘要： A distributed support vector machine privacy-preserving method includes: dividing a secret through secret sharing among all participating entities, iteratively exchanging a part of the information divided by the participating entities, and solving sub-problems locally; performing an iteration until a convergence is reached to find a global optimal solution; and in consideration of the generality of the privacy-preserving method, adopting a privacy-preserving method based on a vertical data distribution and a privacy-preserving method based on a horizontal data distribution, respectively; wherein the participating entities do not trust each other, and interact through a multi-party computation for local training. The method is applied to an honest-but-curious scenario, and uses the idea of data division to perform local computation through the interaction of part of the data among users to finally reconstruct the secret to preserve data privacy.
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