Patents Assigned to NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
  • Patent number: 12281405
    Abstract: The present invention relates to the technical field of electrocatalytic electrode preparation, and discloses a lead dioxide-carbon nanotube adsorptive electrochemical submicroelectrode, a preparation method, and use thereof. The electrochemical submicroelectrode according to the present invention comprises multiple layers of orderly arranged spherical lead dioxide submicroholes communicating with each other, where the carbon nanotubes are partially or completely inserted (in the form of twigs) in the lead dioxide hole and in the wall of the hole. The combined effect of adsorption and catalysis inside the submicroreactor effectively solves the problems of low catalytic efficiency and diffusion control associated with the conventional flat lead dioxide electrode, thus greatly improving the electrochemical catalytic performance of the electrode.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: April 22, 2025
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Weiqing Han, Ruiqian Liu, Siqi Liu, Kajia Wei, Wei Li, Lu Wang, Lianjun Wang, Xiaodong Liu, Jiansheng Li, Xiuyun Sun, Jinyou Shen
  • Patent number: 12221356
    Abstract: Provided is a method for preparing copper azide and cuprous azide encapsulated by conductive metal-organic framework. The method uses a conductive copper-containing metal-organic framework material as a precursor, and completes the azidation of the precursor by means of a liquid-solid electrochemical azidation reaction. Copper azide and cuprous azide nanocrystals are highly uniformly embedded within a conductive framework, which may effectively avoid the agglomeration of copper azide and cuprous azide, and reduce static charge generated by friction, displacement, and the like. Meanwhile, the conductive framework may promote the effective transfer of charge, avoid the accumulation of static charge, and improve the electrostatic safety.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: February 11, 2025
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Wenchao Zhang, Chunpei Yu, Junhong Chen, Zilong Zheng, Yajie Chen, Jiaxin Wang, Bin Hu, Jiahai Ye, Zhichun Qin, Guirong Tian
  • Patent number: 12190495
    Abstract: The present disclosure discloses a microscopic non-destructive measurement method of a microstructure linewidth based on a translation difference, based on a conventional microscopic imaging method, a high-precision displacement platform is used to move a to-be-measured sample, one microscopic image of the sample is acquired before and after the displacement separately, subtraction is performed on the two image to obtain a differential image, a light intensity distribution function of the differential image is derived, data fitting is performed on the differential image, and a high-precision sample linewidth measurement result is obtained by using the characteristic of a high differential pulse positioning resolution.
    Type: Grant
    Filed: September 22, 2023
    Date of Patent: January 7, 2025
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Zhishan Gao, Jianqiu Ma, Qun Yuan, Yifeng Sun, Xiao Huo, Shumin Wang, Jiale Zhang, Xiaoxin Fan
  • Patent number: 12097577
    Abstract: A split-type multifunctional underwater arc welding power supply including a shore power supply module and an underwater power supply module is provided. The shore power supply module comprises a shore power supply main circuit unit and a shore power supply control unit. The shore power supply main circuit unit comprises an input filter circuit, an IGBT full-bridge inverter circuit, an intermediate frequency transformer, and an output rectification filter circuit. The underwater power supply module comprises an underwater power supply main circuit unit and an underwater power supply control unit. The shore power supply module is provided on the shore, and the underwater power supply module is carried underwater.
    Type: Grant
    Filed: June 2, 2022
    Date of Patent: September 24, 2024
    Assignees: JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY, NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY, JIANGSU AUTOMATION RESEARCH INSTITUTE
    Inventors: Zhidong Yang, Yuntao Chen, Shujin Chen, Mingxiao Shi, Chenfu Fang, Kehong Wang, Hongwei Sun, Xiaoyan Gu
  • Publication number: 20240241938
    Abstract: The present disclosure provides a security authentication method, system and device for IoV communication based on a national cryptographic algorithm. The method of the present disclosure includes: constructing, by an on-board unit, an identity authentication request message for transmitting to a road side unit; receiving, by the on-board unit, an identity authentication response message, and verifying a signature; and if the verification is successful, calculating, by the on-board unit, a session key and a hash value thereof, and constructing an acknowledgment message for transmitting to the road side unit, where the acknowledgment message is used in calculating a session key and a hash value thereof by the road side unit for contrast verification; if hash values are equal, security authentication is successful and a session key is generated; and if the hash values are not equal, the security authentication is failed.
    Type: Application
    Filed: February 7, 2023
    Publication date: July 18, 2024
    Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Yong QI, Mingjun LIU
  • Publication number: 20240244066
    Abstract: The present disclosure belongs to the technical field of Internet of vehicles (IoV) security and provides an IoV intrusion detection method and device based on an improved convolutional neural network. The method of the present disclosure includes: collecting original data of data traffic during IoV communication, and inputting the original data to a data dimension reduction algorithm model for IoV intrusion detection for preprocessing to obtain standardized data for IoV data analysis; inputting the standardized data for IoV data analysis to an improved convolutional neural network model for calculation, including: performing convolutional calculation and nonlinear activation on the input data for layering; performing two convolutional operations, two pooling operations and one full connection operation on each layer of data; and classifying a data set output by the improved convolutional neural network model through a SoftMax layer.
    Type: Application
    Filed: February 7, 2023
    Publication date: July 18, 2024
    Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Yong QI, Mingjun LIU, Jianye YU
  • Patent number: 12033409
    Abstract: The present disclosure discloses a character offset detection method and system. The method includes: acquiring a text image; performing character separation based on the text image to obtain a character text region; calculating a center point of each rectangular box in the character text region to obtain a center point set; determining an optimal fitted curve based on the center point set; and analyzing character offset based on the optimal fitted curve to obtain an offset result. The present disclosure realizes detection of the character offset based on curve fitting, so that the accuracy of detection is improved.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: July 9, 2024
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Zechao Li, Jinhui Tang, Huang Li
  • Publication number: 20240149368
    Abstract: A split-type multifunctional underwater arc welding power supply, comprising: including a shore power supply module and an underwater power supply module is provided. The shore power supply module comprises a shore power supply main circuit unit and a shore power supply control unit. The shore power supply main circuit unit comprises an input filter circuit, an IGBT full-bridge inverter circuit, an intermediate frequency transformer, and an output rectification filter circuit. The underwater power supply module comprises an underwater power supply main circuit unit and an underwater power supply control unit. The shore power supply module is provided on the shore, and the underwater power supply module is carried underwater.
    Type: Application
    Filed: June 2, 2022
    Publication date: May 9, 2024
    Applicants: JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY, NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY, JIANGSU AUTOMATION RESEARCH INSTITUTE
    Inventors: Zhidong YANG, Yuntao CHEN, Shujin CHEN, Mingxiao SHI, Chenfu FANG, Kehong WANG, Hongwei SUN, Xiaoyan GU
  • Publication number: 20240134024
    Abstract: The disclosure is a three-dimensional towered checkerboard for multi-sensor calibration, and a LiDAR and camera joint calibration method based on the checkerboard.
    Type: Application
    Filed: January 4, 2024
    Publication date: April 25, 2024
    Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Mingwu REN, Dexin REN
  • Patent number: 11960034
    Abstract: The disclosure is a three-dimensional towered checkerboard for multi-sensor calibration, and a LiDAR and camera joint calibration method based on the checkerboard.
    Type: Grant
    Filed: April 6, 2023
    Date of Patent: April 16, 2024
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Dexin Ren, Mingwu Ren
  • Patent number: 11961244
    Abstract: Disclosed is a high-precision dynamic real-time 360-degree omnidirectional point cloud acquisition method based on fringe projection. The method comprises: firstly, by means of the fringe projection technology based on a stereoscopic phase unwrapping method, and with the assistance of an adaptive dynamic depth constraint mechanism, acquiring high-precision three-dimensional (3D) data of an object in real time without any additional auxiliary fringe pattern; and then, after a two-dimensional (2D) matching points optimized by the means of corresponding 3D information is rapidly acquired, by means of a two-thread parallel mechanism, carrying out coarse registration based on Simultaneous Localization and Mapping (SLAM) technology and fine registration based on Iterative Closest Point (ICP) technology.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: April 16, 2024
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Chao Zuo, Jiaming Qian, Qian Chen, Shijie Feng, Tianyang Tao, Yan Hu, Wei Yin, Liang Zhang, Kai Liu, Shuaijie Wu, Mingzhu Xu, Jiaye Wang
  • Patent number: 11906286
    Abstract: The invention discloses a deep learning-based temporal phase unwrapping method for fringe projection profilometry. First, four sets of three-step phase-shifting fringe patterns with different frequencies (including 1, 8, 32, and 64) are projected to the tested objects. The three-step phase-shifting fringe images acquired by the camera are processed to obtain the wrapped phase map using a three-step phase-shifting algorithm. Then, a multi-frequency temporal phase unwrapping (MF-TPU) algorithm is used to unwrap the wrapped phase map to obtain a fringe order map of the high-frequency phase with 64 periods. A residual convolutional neural network is built, and its input data are set to be the wrapped phase maps with frequencies of 1 and 64, and the output data are set to be the fringe order map of the high-frequency phase with 64 periods. Finally, the training dataset and the validation dataset are built to train and validate the network.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: February 20, 2024
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Qian Chen, Chao Zuo, Shijie Feng, Yuzhen Zhang, Guohua Gu
  • Patent number: 11893719
    Abstract: A single-shot differential phase contrast quantitative phase imaging method based on color multiplexing illumination. A color multiplexing illumination solution is used to realize single-shot differential phase contrast quantitative phase imaging. In the single-shot color multiplexing illumination solution, three illumination wavelengths of red, green, and blue are used to simultaneously illuminate a sample, and the information of the sample in multiple directions is converted into intensity information on different channels of a color image. By performing channel separation on this color image, the information about the sample at different spatial frequencies can be obtained.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: February 6, 2024
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Qian Chen, Yao Fan, Chao Zuo, Jiasong Sun, Xiangpeng Pan, Shijie Feng, Yuzhen Zhang, Guohua Gu, Jiaji Li, Jialin Zhang
  • Publication number: 20240037765
    Abstract: Disclosed is a high-precision dynamic real-time 360-degree omnidirectional point cloud acquisition method based on fringe projection. The method comprises: firstly, by means of the fringe projection technology based on a stereoscopic phase unwrapping method, and with the assistance of an adaptive dynamic depth constraint mechanism, acquiring high-precision three-dimensional (3D) data of an object in real time without any additional auxiliary fringe pattern; and then, after a two-dimensional (2D) matching points optimized by the means of corresponding 3D information is rapidly acquired, by means of a two-thread parallel mechanism, carrying out coarse registration based on Simultaneous Localization and Mapping (SLAM) technology and fine registration based on Iterative Closest Point (ICP) technology.
    Type: Application
    Filed: August 27, 2020
    Publication date: February 1, 2024
    Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Chao ZUO, Jiaming QIAN, Qian CHEN, Shijie FENG, Tianyang TAO, Yan HU, Wei YIN, Liang ZHANG, Kai LIU, Shuaijie WU, Mingzhu XU, Jiaye WANG
  • Patent number: 11808564
    Abstract: A calibration method for fringe projection systems based on plane mirrors. Firstly, two mirrors are placed behind the tested object. Through the reflection of mirrors, the camera can image the measured object from the front and other two perspectives, so as to obtain 360-degree two-dimensional information of the measured object. The projector projects three sets of phase-shifting fringe patterns with frequencies of 1, 8, and 64. The camera captures the fringe image to obtain an absolute phase map with a frequency of 64 by using the phase-shifting method and the temporal phase unwrapping algorithm. By using the calibration parameters between the projector and the camera, the absolute phase map can be converted into three-dimensional information of the measured object. Then, the mirror calibration is realized by capturing a set of 3D feature point pairs, so that the 3D information from different perspectives is transformed into a unified world coordinate system.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: November 7, 2023
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Chao Zuo, Wei Yin, Qian Chen, Shijie Feng, Jiasong Sun, Tianyang Tao, Yan Hu, Liang Zhang, Jiaming Qian
  • Patent number: 11787717
    Abstract: The present invention discloses an electrocatalytic Fenton oxidation-electrochemical oxidation coupling process and apparatus for efficient treatment of chemical wastewater, and belongs to the field of sewage treatment. The process includes an electrocatalytic Fenton oxidation step, an electrochemical oxidation step, and a pH adjustment step. A spacing between a cathode and an anode in the electrocatalytic Fenton oxidation step is controlled, so that oxygen produced at the anode reacts at the cathode to produce H2O2. The treatment requirements can be met without external aeration or external addition of H2O2, and meanwhile, the efficiency of COD removal by electro-Fenton oxidation is effectively improved. Further, by connecting a pH adjusting tank with the electrocatalytic Fenton oxidation-electrochemical oxidation coupling apparatus in series, a coupling treatment process with near-zero production of iron sludge is realized.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: October 17, 2023
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Weiqing Han, Tao Cui, Kajia Wei, Wei Li, Lianjun Wang, Xiaodong Liu, Xiuyun Sun, Jiansheng Li, Jinyou Shen
  • Patent number: 11781966
    Abstract: The present invention discloses a three-dimensional diffraction tomography microscopy imaging method based on LED array coded illumination. Firstly, acquiring the raw intensity images, three sets of intensity image stacks are acquired at different out-of-focus positions by moving the stage or using electrically tunable lens. And then, after acquiring the intensity image stacks of the object to be measured at different out-of-focus positions, the three-dimensional phase transfer function of the microscopy imaging system with arbitrary shape illumination is derived. Further, the three-dimensional phase transfer function of the microscopic system under circular and annular illumination with different coherence coefficients is obtained as well, and the three-dimensional quantitative refractive index is reconstructed by inverse Fourier transform of the three-dimensional scattering potential function. The scattering potential function is converted into the refractive index distribution.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: October 10, 2023
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Chao Zuo, Qian Chen, Jiaji Li, Jiasong Sun, Yao Fan, Shijie Feng, Yuzhen Zhang
  • Publication number: 20230251363
    Abstract: The disclosure is a three-dimensional towered checkerboard for multi-sensor calibration, and a LiDAR and camera joint calibration method based on the checkerboard.
    Type: Application
    Filed: April 6, 2023
    Publication date: August 10, 2023
    Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Dexin REN, Mingwu REN
  • Patent number: 11721130
    Abstract: The present disclosure relates to a weakly supervised video activity detection method and system based on iterative learning. The method includes: extracting spatial-temporal features of a video that contains actions; constructing a neural network model group; training a first neural network model according to the class label of the video, a class activation sequence output by the first neural network model, and a video feature output by the first neural network model; training the next neural network model according to the class label of the video, a pseudo temporal label output by the current neural network model, a class activation sequence output by the next neural network model, and a video feature output by the next neural network model; and performing action detection on the test video according to the neural network model corresponding to the highest detection accuracy value.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: August 8, 2023
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Yan Song, Rong Zou, Xiangbo Shu
  • Patent number: 11650406
    Abstract: A microscopic imaging method of phase contrast (PC) and differential interference contrast (DIC) based on the transport of intensity equation (TIE) includes capturing three intensity images along the optical axis; solving the TIE by deconvolution to obtain the quantitative phase; obtaining the intensity image under the DIC imaging mode according to the DIC imaging principle; and obtaining the corresponding phase image of PC imaging mode according to the PC imaging principle. The method can endow the bright-field microscope with the ability to realize PC and DIC imaging without complex modification of the traditional bright-field microscope. In addition, it has the same imaging performance as the phase contrast microscope and differential interference contrast microscope, which are expensive, complex-structure, and has strict environmental conditions.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: May 16, 2023
    Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Chao Zuo, Qian Chen, Jiasong Sun, Yuzhen Zhang, Guohua Gu