Patents Assigned to NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY
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Patent number: 12334973Abstract: A design method for a satellite navigation signal system with mixed modulation of direct spread spectrum and frequency hopping includes: modulating the spread spectrum code sequence of multipath signal components; mixing and multiplexing with the signal components corresponding to the same frequency point; forming a baseband code sequence; separating signal components corresponding to the baseband code sequence to obtain separated radio frequency signals; recombining and modulating separated radio frequency signals; controlling the frequency hopping pattern by the frequency hopping code sequence if the separated radio frequency signals are authorized signals, and performing mixed frequency synthesis modulation; performing direct combined radio frequency modulation if the separated radio frequency signals are unauthorized signals, and obtaining the recombined signal component; amplifying the signal power to obtain the direct spread spectrum navigation signal.Type: GrantFiled: January 16, 2025Date of Patent: June 17, 2025Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Wei Xiao, Wenxiang Liu, Feixue Wang, Xiaozhou Ye, Pengcheng Ma, Zukun Lu, Zongnan Li, Guangfu Sun, Xiaomei Tang, Muzi Yuan, Honglei Lin, Sixin Wang
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Patent number: 12289126Abstract: A method and a device for joint suppression of narrowband and multiple access interference are provided. The method includes: performing time domain windowing processing on a received signal, and performing frequency domain interference processing on a signal after windowing processing to obtain a matched filter and a time domain signal; obtaining reconstructed baseband received data for a signal of each channel; obtaining reconstructed signals after matched filtering; accumulating the reconstructed signals of multiple channels to obtain a reconstructed accumulated value, obtaining a compensation value according to a difference between the time domain signal and the reconstructed accumulated value, and compensating the reconstructed signals with the compensation value to obtain an actual received signal of the each channel; and outputting a joint suppression result.Type: GrantFiled: December 17, 2024Date of Patent: April 29, 2025Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Jingyuan Li, Rong Zhou, Xinming Huang, Shaojie Ni, Hang Gong, Wenxiang Liu, Zengjun Liu, Ke Zhang, Yuchen Xie, Sixin Wang, Kuo Cao
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Patent number: 12278735Abstract: Disclosed are an isolation method for a high-performance computer system, and a high-performance computer system. The isolation method comprises node-level isolation performed. The node-level isolation comprises: configuring a routing table for each computing node, and configuring, in the routing table, valid routing information for computing node pairs; when any one source computing node needs to communicate with a target computing node, determining, by lookup, whether valid routing information exists between the source computing node and the target computing node according to the configured routing table; if so, allowing the source computing node to communicate with the target computing node; otherwise, forbidding the source computing node from communicating with the target computing node.Type: GrantFiled: June 27, 2023Date of Patent: April 15, 2025Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Pingjing Lu, Mingche Lai, Zeyu Xiong, Jinbo Xu, Junsheng Chang, Xingyun Qi, Zhang Luo, Yuan Li, Yan Sun, Yang Ou, Zicong Wang, Jianmin Zhang
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Patent number: 12174507Abstract: A flexible variable emissivity electrochromic device and a preparation method thereof are disclosed. The device includes a working electrode, a gel electrolyte layer, and a counter electrode sequentially from top to bottom. The working electrode includes a flexible polymer film and a metal film, the flexible polymer film is a surface-modified film and/or a film with a transition layer plated on a lower side thereof, and the metal film is deposited on the surface-modified film or the transition layer. The electrolyte layer includes a porous membrane and an electrolyte. The electrolyte is infiltrated in the porous membrane. The electrolyte includes an electrochromic material containing metal ions and a solvent, the metal ions enable reversible electrodeposition and dissolution, and metal of the metal ions is different from that used in the metal film. The preparation method includes preparing and assembling a working electrode, a gel electrolyte layer and a counter electrode.Type: GrantFiled: October 28, 2020Date of Patent: December 24, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Dongqing Liu, Mingyang Li, Haifeng Cheng, Liang Peng, Renfu Peng
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Patent number: 12169477Abstract: A method and system for deduplication caching using an unreliable edge resource include acquiring a total storage capacity of all edge servers, searching for candidate cache files by a similarity-based hierarchical clustering (SHC) method, and acquiring file clusters of all the candidate cache files after clustering, where the candidate cache files each include a deduplicated data chunk, and based on the file clusters and an reliability of all of the edge servers, selecting, by a heuristic algorithm, a file cluster from the file clusters to cache to the edge server until a size of cached content reaches the total storage capacity. The present disclosure makes a trade-off between file availability and space efficiency, thereby effectively improving the cache hit rate in the limited edge caching space.Type: GrantFiled: April 24, 2023Date of Patent: December 17, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Lailong Luo, Geyao Cheng, Deke Guo, Junxu Xia, Bowen Sun
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Publication number: 20240367278Abstract: The disclosure relates to a permanent magnet-electromagnet hybrid array type magnetorheological polishing device, comprising a polishing mechanism, a main excitation device arranged on the polishing mechanism, and auxiliary permanent magnet sets used for driving magnetorheological liquid to be recycled. The main excitation device is a permanent magnet-electromagnet hybrid array comprising main excitation permanent magnets and fine-adjustment electromagnetic excitation devices connected with the main excitation permanent magnets. Each fine-adjustment electromagnetic excitation device comprises a coil and a coil retaining pile. The main excitation device further comprises a permanent magnet-electromagnet device connecting plate made from a non-magnetically conductive material.Type: ApplicationFiled: April 29, 2024Publication date: November 7, 2024Applicant: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Feng SHI, Bo WANG, Guipeng TIE, Ci SONG, Ye TIAN, Shuo QIAO, Xing PENG
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Patent number: 12013951Abstract: A cross-site scripting (XSS) risk analysis method based on a Bayesian network and a STRIDE model includes: constructing an XSS attack-related STRIDE threat model of a network information release system; obtaining a network structure of a Bayesian network-based XSS attack risk analysis model based on the STRIDE model; obtaining prior probabilities of all nodes in the network structure of the Bayesian network-based XSS attack risk analysis model based on expert experience and a node ranking algorithm; obtaining a training dataset through simulation by using a rejection sampling algorithm or a direct sampling method; performing network training on the network structure of the Bayesian network-based XSS attack risk analysis model by using the training dataset to obtain the Bayesian network-based XSS attack risk analysis model; and reasoning a Bayesian network to obtain a quantitative analysis result of an XSS attack risk of the network information release system.Type: GrantFiled: July 8, 2022Date of Patent: June 18, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Yun Zhou, Pengtao Fu, Xianqiang Zhu, Zhaoyun Ding, Cheng Zhu
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Patent number: 12007013Abstract: A gear-based mechanical metamaterial with continuously adjustable elastic parameters in a large range is provided. The gear-based mechanical metamaterial includes a gear array, a frame and connecting shafts. The gear array is formed by periodically extending mechanical metamaterial cells along an x direction and a y direction. Each of the mechanical metamaterial cells is formed by arranging a multiple gears. Adjacent gears of the multiple gears are meshed with each other. Each of the multiple gears includes a center hole and two centrosymmetric irregularly-shaped holes. A thickness of an elastic arm between the each of two centrosymmetric irregularly-shaped holes and an outer wall of a corresponding one of the multiple gears is uniformly increased or decreased. Each of the connecting shafts is arranged in a center hole of a corresponding one of the multiple gears.Type: GrantFiled: November 5, 2021Date of Patent: June 11, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Xin Fang, Jihong Wen, Dianlong Yu
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Patent number: 11984934Abstract: The present invention discloses an integrated photonic chip structure for universal quantum walk simulation which combines the multiphoton source that can generate the spatially entangled multi-photon state and the linear optical network that can implement the unitary transformation, and establishes mapping between on-chip spatial-entangled multi-photon state and quantum walk state and mapping between on-chip linear optical unitary transformation and the evolution process of multi-particle quantum walk. By manipulating the spatially entangled multi-photon state generated via the multi-photon sources and the optical unitary transformation implemented via the universal linear optical networks, the chip structure can implement universal quantum walk simulation with the control over all parameters of multiple-particle quantum walks including such as evolution Hamiltonian, evolution time, initial evolution state and particle properties (i.e., particle indistinguishability and particle exchange symmetry).Type: GrantFiled: April 13, 2021Date of Patent: May 14, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Xiaogang Qiang, Junjie Wu, Yizhi Wang
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Publication number: 20240126722Abstract: A method and system for deduplication caching using an unreliable edge resource include acquiring a total storage capacity of all edge servers, searching for candidate cache files by a similarity-based hierarchical clustering (SHC) method, and acquiring file clusters of all the candidate cache files after clustering, where the candidate cache files each include a deduplicated data chunk, and based on the file clusters and an reliability of all of the edge servers, selecting, by a heuristic algorithm, a file cluster from the file clusters to cache to the edge server until a size of cached content reaches the total storage capacity. The present disclosure makes a trade-off between file availability and space efficiency, thereby effectively improving the cache hit rate in the limited edge caching space.Type: ApplicationFiled: April 24, 2023Publication date: April 18, 2024Applicant: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Lailong LUO, Geyao CHENG, Deke GUO, Junxu XIA, Bowen SUN
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Patent number: 11933282Abstract: An inductive plasma acceleration apparatus, comprising a pulse laser assembly, a pulsed discharge assembly, an exciting coil assembly, a solid-state working medium, and a control assembly; the exciting coil assembly is electrically connected to the pulsed discharge assembly such that a strong pulse current is produced in the exciting coil assembly during the discharge process of the pulse discharge assembly, and an inductive pulse electromagnetic field is excited around the exciting coil assembly; the solid-state working medium is positioned on the optical path of a pulse laser emitted by the pulse laser assembly such that the solid-state working medium produces a pulse gas under the ablation action of the pulse laser, and the inductive pulse electromagnetic field is positioned on the circulation gas path of the pulse gas such that the pulse gas can enter the inductive pulse electromagnetic field.Type: GrantFiled: September 25, 2020Date of Patent: March 19, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Xiaokang Li, Mousen Cheng, Jianjun Wu, Bixuan Che, Moge Wang, Dawei Guo, Xiong Yang
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Patent number: 11920932Abstract: A wafer-level assembly method for a micro hemispherical resonator gyroscope includes: after independently manufactured glass substrates are softened and deformed at a high temperature, forming a micro hemispherical resonator on the glass substrate; forming glass substrate alignment holes at both ends of the glass substrate by laser ablation; aligning and fixing a plurality of identical micro hemispherical resonators on a wafer fixture by using the alignment holes as a reference, and then performing operations by using the wafer fixture as a unit to implement subsequent processes that include: releasing the micro hemispherical resonators, metallizing the surface, fixing to the planar electrode substrates, separating the wafer fixture and cleaning to obtain a micro hemispherical resonator gyroscope driven by a bottom planar electrode substrate.Type: GrantFiled: September 17, 2020Date of Patent: March 5, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Xuezhong Wu, Dingbang Xiao, Xiang Xi, Yulie Wu, Hanhui He, Yan Shi, Kun Lu, Bin Li, Yimo Chen, Chao Yuan, Bao Nie
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Publication number: 20240073100Abstract: Disclosed are an isolation method for a high-performance computer system, and a high-performance computer system. The isolation method comprises node-level isolation performed. The node-level isolation comprises: configuring a routing table for each computing node, and configuring, in the routing table, valid routing information for computing node pairs; when any one source computing node needs to communicate with a target computing node, determining, by lookup, whether valid routing information exists between the source computing node and the target computing node according to the configured routing table; if so, allowing the source computing node to communicate with the target computing node; otherwise, forbidding the source computing node from communicating with the target computing node.Type: ApplicationFiled: June 27, 2023Publication date: February 29, 2024Applicant: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Pingjing LU, Mingche LAI, Zeyu XIONG, Jinbo XU, Junsheng CHANG, Xingyun QI, Zhang LUO, Yuan LI, Yan SUN, Yang OU, Zicong WANG, Jianmin ZHANG
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Patent number: 11910440Abstract: Disclosed are a method for communication, an electronic device, and a computer-readable storage medium. The method includes: determining a first target frequency based on historical sensed information of a destination node; transmitting an RTS frame to the destination node at the first target frequency, where the destination node obtains first sensed information of the source node from the RTS frame, and determines a first optimal receiving frequency of the source node based on the first sensed information; receiving a CTS frame transmitted by the destination node at the first optimal receiving frequency; obtaining second sensed information of the destination node from the CTS frame; determining a second optimal receiving frequency of the destination node based on the second sensed information; transmitting a data frame to the destination node at the second optimal receiving frequency; and receiving an ACK frame transmitted by the destination node at the first optimal receiving frequency.Type: GrantFiled: April 7, 2023Date of Patent: February 20, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Jibo Wei, Fanglin Gu, Haitao Zhao, Jie Liu, Xiaoran Liu, Jun Xiong
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Patent number: 11892742Abstract: The present invention discloses a method for calibrating controllable phase shifters in a multi-stage staggered Mach-Zehnder interferometer structure on an optical chip, aiming to solve the problem of calibrating the controllable phase shifters in a configurable optical network of the multi-stage staggered Mach-Zehnder interferometers. The technical solution is to calibrate the controllable phase shifters that can be calibrated in the optical network; and then to constitute calibration conditions for and calibrate inner phase shifters that has not been; and finally to constitute calibration conditions for and calibrate outer phase shifters that is not calibrated.Type: GrantFiled: September 10, 2020Date of Patent: February 6, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Junjie Wu, Yang Wang, Xiaogang Qiang, Ping Xu, Jiangfang Ding, Mingtang Deng, Anqi Huang, Xiang Fu
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Patent number: 11885641Abstract: An elastically supported electrode substrate for detecting unbalanced mass of a resonant gyroscope includes an outer frame and an inner structure. A connection part configured to be connected to an anchor of a resonator is arranged at the center of the inner structure, and electrodes are distributed on the inner structure. The inner structure is connected inside the outer frame through elastic beams, and the inner structure has torsional and/or translational resonant modes inside the outer frame. The resonant frequency of the inner structure approaches resonant frequency of an operating mode of the resonator. Since the resonant frequency of the elastically supported electrode substrate approaches the resonant frequency of the operating mode of the resonator, the vibration displacement induced by the unbalanced mass of the elastically supported electrode substrate can be significantly magnified to improve the detection sensitivity.Type: GrantFiled: February 16, 2023Date of Patent: January 30, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Yan Shi, Dingbang Xiao, Kun Lu, Xiang Xi, Xuezhong Wu, Yulie Wu, Yongmeng Zhang
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Patent number: 11882299Abstract: A predictive contrastive representation method for multivariate time-series data processing includes: mapping temporal coding information at a current moment and future situational information by using a logarithmic bilinear model to obtain a similarity; training the similarity according to a noise contrastive estimation method and prediction situational label data, and constructing, based on a training result, a predictive contrastive loss function of the temporal coding information at the current moment and the future situational information; sampling the prediction situational label data based on a corresponding optimal loss in the predictive contrastive loss function, optimizing the predictive contrastive loss function by using a direct proportion property between the sampling probability and the similarity, constructing mutual information between the temporal coding information at the current moment and the future situational information based on the optimized predictive contrastive loss function, and peType: GrantFiled: June 7, 2023Date of Patent: January 23, 2024Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Yanghe Feng, Yulong Zhang, Longfei Zhang
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Publication number: 20230392956Abstract: An elastically supported electrode substrate for detecting unbalanced mass of a resonant gyroscope includes an outer frame and an inner structure. A connection part configured to be connected to an anchor of a resonator is arranged at the center of the inner structure, and electrodes are distributed on the inner structure. The inner structure is connected inside the outer frame through elastic beams, and the inner structure has torsional and/or translational resonant modes inside the outer frame. The resonant frequency of the inner structure approaches resonant frequency of an operating mode of the resonator. Since the resonant frequency of the elastically supported electrode substrate approaches the resonant frequency of the operating mode of the resonator, the vibration displacement induced by the unbalanced mass of the elastically supported electrode substrate can be significantly magnified to improve the detection sensitivity.Type: ApplicationFiled: February 16, 2023Publication date: December 7, 2023Applicant: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Yan SHI, Dingbang XIAO, Kun LU, Xiang XI, Xuezhong WU, Yulie WU, Yongmeng ZHANG
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Patent number: 11809303Abstract: A high-performance computing-oriented method for automatically deploying an execution environment along with a job, including: presetting isolated execution environments at nodes of a high-performance computing system; logging in an isolated execution environment of a login node; carrying out development and debugging on the job and configuration on a job execution environment at the login node, and issuing a job running request to a job management system; assigning compute nodes from the nodes of the high-performance computing system to the job of the user by the job management system, automatically deploying an file system of the user synchronously to the assigned compute nodes along with the job when the job is loaded, and running the job of the user by the corresponding compute nodes; and feeding results back to the login node of the user after running the job is completed, then clearing file systems.Type: GrantFiled: November 26, 2021Date of Patent: November 7, 2023Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Kai Lu, Wenzhe Zhang, Ruibo Wang, Wanqing Chi, Yong Dong, Wei Zhang, Huijun Wu, Mingtian Shao
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Publication number: 20230299553Abstract: A method and a system for generating single-sideband Raman light for cold atom interferometer through phase modulation are provided. The system includes a laser, an electro-optic modulator (EOM), a local microwave oscillator, a narrow-bandwidth optical-fiber filter, an optical-fiber power amplifier and a frequency doubling crystal. The laser has frequency of ? and is input to the EOM. The local microwave oscillator applies a modulation voltage with frequency of ? to the EOM and generate double-sideband frequency-modulated light with frequencies of ?±n?(n=0,1,2, . . . ). This light is filtered by the narrow-bandwidth optical-fiber filter, which outputs the target frequency light and is successively input to the optical-fiber power amplifier and the frequency doubling crystal and yields the single-sideband Raman light for cold atom interferometer.Type: ApplicationFiled: November 24, 2020Publication date: September 21, 2023Applicant: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGYInventors: Jun YANG, Guochao WANG, Lingxiao ZHU, Shuhua YAN, Xiye GUO, Yaning WANG, Aiai JIA, Mengjie LV, Dongyang XU, Xu ZHANG, Huankai ZHANG, Xiao YU