Patents Assigned to NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS
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Publication number: 20230156262Abstract: The present disclosure discloses a content delivery method and system through an in-vehicle network based on regional content popularity, and in particular relates to the technical field of in-vehicle networks. For a content library corresponding to a target region and each target vehicle in the target region, each target vehicle responds to content objects in the content library. Based on each content object in the content library corresponding to the target region and a data eigenvalue of a preset data type corresponding to each content object, for each target vehicle in the target region that receives a data screening request, in response to the data screening request, content objects that match the data screening request are obtained and scheduled. A set of data screening requests responded to by each target vehicle is obtained by constructing a utility function.Type: ApplicationFiled: November 11, 2022Publication date: May 18, 2023Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Qi ZHU, Shaoqi YUE
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Publication number: 20230089280Abstract: The present disclosure discloses an image haze removal method and apparatus, and a device. The method includes: acquiring a hazy image to be processed; and obtaining a haze-free image corresponding to the hazy image by inputting the hazy image into a pre-trained haze removal model. The present disclosure uses the residual dual attention fusion modules as basic modules of the neural network, so that each feature map can obtain pixel features while enhancing the global dependence, thus improving the image dehazing effect.Type: ApplicationFiled: November 15, 2022Publication date: March 23, 2023Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Dengyin ZHANG, Hong ZHU, Wensheng HAN, Weidan YAN, Yingjie KOU
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Patent number: 11580646Abstract: A medical image segmentation method based on a U-Net, including: sending real segmentation image and original image to a generative adversarial network for data enhancement to generate a composite image with a label; then putting the composite image into original data set to obtain an expanded data set, and sending the expanded data set to improved multi-feature fusion segmentation network for training. A Dilated Convolution Module is added between the shallow and deep feature skip connections of the segmentation network to obtain receptive fields with different sizes, which enhances the fusion of detail information and deep semantics, improves the adaptability to the size of the segmentation target, and improves the medical image segmentation accuracy. The over-fitting problem that occurs when training the segmentation network is alleviated by using the expanded data set of the generative adversarial network.Type: GrantFiled: January 5, 2022Date of Patent: February 14, 2023Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Dengyin Zhang, Rong Zhao, Weidan Yan
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Publication number: 20230041216Abstract: A user matching and power distribution methods for a MIMO-NOMA downlink communication system is provided. The user matching method includes: dividing all users into a strong user group and a weak user group according to a channel gain sorting result; and sequentially selecting a user in the strong user group, calculating a correlation coefficient between the user and each user in the weak user group, selecting a weak user with the highest correlation coefficient as a weak user in a cluster where the strong user is located, and excluding matched users from respective user groups, until the matching between all strong users and weak users are completed. The present invention enables weak users in a cluster to experience less inter-cluster interference in scenarios where the channel correlation between users is relatively low, thereby improving the total throughput of the communication system.Type: ApplicationFiled: February 21, 2020Publication date: February 9, 2023Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Yin LU, Yihuang QU, Chuying YANG, Taosen LI, Xiumei WANG, Hongbo ZHU
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Patent number: 11554406Abstract: A high-precision heavy-load numerically-controlled flanging machine comprises a machine frame, an edge pressing assembly, a flanging beam and a flanging beam transmission mechanism that comprises an inclined slide rail, an inertia block and two crank-connecting rod mechanisms; the flanging beam is provided with a driving inclined plane; the inclined slide rail is mounted on the machine frame; the inertia block is provided with two non-parallel inclined planes, wherein one inclined plane of the inertia block is slidably mounted on the inclined slide rail to form a sliding pair I, and the other inclined plane of the inertia block is in sliding fit with the driving inclined plane of the flanging beam to form a sliding pair II; cranks of the two crank-connecting rod mechanisms are hinged on the machine frame.Type: GrantFiled: May 31, 2021Date of Patent: January 17, 2023Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Fengyu Xu, Baojie Fan, Sen Yang, Kaiwei Ma, Guoping Jiang
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Publication number: 20220405129Abstract: The present disclosure discloses a workflow scheduling method and system based on a multi-target particle swarm algorithm, and a storage medium. The method comprises the following steps that first, the difference between the frequency reduction characteristic and the execution time of each server in a cluster is considered; a multi-target comprehensive evaluation model covering workflow execution overhead, execution time and cluster load balance is constructed on the basis of a traditional model; second, a multi-target particle swarm algorithm is provided for workflow scheduling, and an efficient solving method is provided. The method alleviates the defects of premature convergence and low species diversity of the particle swarm algorithm, reduces the execution overhead and execution time of the workflow on the cluster server, and better balances the load of the cluster server.Type: ApplicationFiled: June 22, 2022Publication date: December 22, 2022Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Dengyin ZHANG, Yingjie KOU, Chenhui SUN, Yulian ZHANG, Shibo KANG
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Patent number: 11522689Abstract: The present invention relates to the field of quantum communication, especially a quantum key distribution device that can be configured with multiple protocols. It uses the simplified Faraday-Michelson interference ring in combination with the intensity modulator to perform timestamp encoding in a chopping manner. The phase modulation is completed with a Sagnac ring device composed of a single-polarization phase modulator, a polarization beam splitter and a Faraday rotator, so as to achieve the purpose of composite encoding and decoding, thus realizing a quantum key distribution device which can be configured with multiple protocols and multiple decoy state schemes. This device can be compatible with multiple protocols including BB84 protocol, the reference frame-independent protocol, the six-state protocol and SARG protocol and is characterized with polarization-independent phase modulation and low system complexity.Type: GrantFiled: January 26, 2022Date of Patent: December 6, 2022Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Qin Wang, Qingqing Jiang, Huajian Ding, Chunhui Zhang, Jian Li
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Patent number: 11520934Abstract: A method for preventing a differential cryptanalysis attack is provided. The method is implemented by an adaptive scan chain, a control module, and a plaintext analysis module. The plaintext analysis module controls the adaptive scan chain, so that two plaintexts differing in the last bit of only one byte are input through scan chains with different structures. Consequently, the two input plaintexts for which differential cryptanalysis attack technology originally can be used to crack the key are unable to generate outputs that can be used by the differential cryptanalysis attack technology.Type: GrantFiled: March 12, 2021Date of Patent: December 6, 2022Assignees: Nanjing University Of Posts And Telecommunications, NANTONG INSTITUTE OF NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS CO., LTD.Inventors: Zhikuang Cai, Xun Xu, Ming Wang, Zixuan Wang, Henglu Wang, Jingqi Yao, Jiafei Yao, Yufeng Guo
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Publication number: 20220379224Abstract: The present disclosure discloses a chess self-learning method and device based on machine learning, a move selection output layer and a value evaluation output layer of the method share the same input layer and hidden layer of a neural network, and a Monte Carlo tree search tree is used to construct a strategy optimizer. The training process of the method is divided into two parts, namely data generation and neural network training, so that an error between a value scalar outputted by a neural network and a final result of self-play is as small as possible, and a move vector outputted by the neural network is as close as possible to a decision vector given by a Monte Carlo tree for each search step. The present disclosure aims to construct an Al chess player for people to play chess.Type: ApplicationFiled: June 22, 2022Publication date: December 1, 2022Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Dengyin ZHANG, Cheng ZHOU
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Publication number: 20220334308Abstract: A monolithic optoelectronic integrated circuit is provided, including: a substrate including photonic integrated device region and a peripheral circuit region; a first GaN-based multi-quantum well optoelectronic PN-junction device including a first P-type ohmic contact electrode and a first N-type ohmic contact electrode; and a first GaN-based field-effect transistor, where the first GaN-based field-effect transistor includes a first gate dielectric layer disposed on the surface of the substrate and having a first recess, a first gate filled within the first recess, and a first source and a first drain that are disposed the opposite sides of the first gate, where the first source is electrically connected to the first P-type ohmic contact electrode, the first drain is configured to be electrically connected to a first potential.Type: ApplicationFiled: June 29, 2022Publication date: October 20, 2022Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Yongjin WANG, Jiabin YAN, Jinlong PIAO
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Publication number: 20220300662Abstract: A method for preventing a differential cryptanalysis attack is provided. The method is implemented by an adaptive scan chain, a control module, and a plaintext analysis module. The plaintext analysis module controls the adaptive scan chain, so that two plaintexts differing in the last bit of only one byte are input through scan chains with different structures. Consequently, the two input plaintexts for which differential cryptanalysis attack technology originally can be used to crack the key are unable to generate outputs that can be used by the differential cryptanalysis attack technology.Type: ApplicationFiled: March 12, 2021Publication date: September 22, 2022Applicants: Nanjing University Of Posts And Telecommunications, NANTONG INSTITUTE OF NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS CO.,LTD.Inventors: Zhikuang CAI, Xun XU, Ming WANG, Zixuan WANG, Henglu WANG, Jingqi YAO, Jiafei YAO, Yufeng GUO
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Publication number: 20220247557Abstract: The present invention relates to the field of quantum communication, especially a quantum key distribution device that can be configured with multiple protocols. It uses the simplified Faraday-Michelson interference ring in combination with the intensity modulator to perform timestamp encoding in a chopping manner. The phase modulation is completed with a Sagnac ring device composed of a single-polarization phase modulator, a polarization beam splitter and a Faraday rotator, so as to achieve the purpose of composite encoding and decoding, thus realizing a quantum key distribution device which can be configured with multiple protocols and multiple decoy state schemes. This device can be compatible with multiple protocols including BB84 protocol, the reference frame-independent protocol, the six-state protocol and SARG protocol and is characterized with polarization-independent phase modulation and low system complexity.Type: ApplicationFiled: January 26, 2022Publication date: August 4, 2022Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Qin WANG, Qingqing JIANG, Huajian DING, Chunhui ZHANG, Jian LI
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Patent number: 11387551Abstract: The present invention discloses a triple-resonant null frequency scanning antenna, which belongs to the technical fields of the Internet of Things and microwave. The triple-resonant null frequency scanning antenna comprises a circular sector magnetic dipole arranged on a medium substrate, and rectangular notches are symmetrically arranged on a sector patch of the circular sector magnetic dipole. The circular sector magnetic dipole is fixed on the medium substrate by a second shorting pin and third shorting pins, an flared angle of the circular sector magnetic dipole is a first central angle, and two third shorting pins are present and are symmetrically arranged on both sides of the angular bisector of the first central angle.Type: GrantFiled: June 16, 2020Date of Patent: July 12, 2022Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Wenjun Lv, Sijie Li, Yun Shao, Jianyuan Wang, Han Wu, Zhibin Zhao, Zhifang Wu, Xiaohui Li, Hongbo Zhu, Xiaofei Li
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Patent number: 11364531Abstract: A metal workpiece indentation marking device, comprising a frame, a striking head, an automatic marking die, a gripper and a two-dimensional moving mechanism, wherein the top of the striking head is connected to the frame; the striking head can move up and down; the automatic marking die is fixedly disposed at the bottom of the striking head; a clamping jaw for clamping a metal workpiece is disposed at the top of the gripper; the gripper can move back and forth or left and right under the action of the two-dimensional moving mechanism, such that a position to be marked at the top of the metal workpiece can be located under the automatic marking die.Type: GrantFiled: September 10, 2019Date of Patent: June 21, 2022Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Fengyu Xu, Sen Yang, Fan Lv, Guoping Jiang, Jingjin Shen
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Patent number: 11349216Abstract: The present invention discloses a sector dual-resonant dipole antenna. Radiation elements of the antenna are two identical sector patches. Two identical rectangular notches can be symmetrically arranged or two identical tuning stubs can be symmetrically loaded on the sector patches at positions deviating from the central axis of the two sector patches. Exciting points are symmetrically arranged on sides of the sector patches close to a central axis. The present invention realizes a wide beamwidth radiation characteristic through a two-dimensional sectorial resonator, and then the notches are arranged or the tuning stubs are loaded at appropriate positions of two arms of the sectorial resonator, and thereby a dual-resonant characteristic can be realized within a working band.Type: GrantFiled: June 16, 2020Date of Patent: May 31, 2022Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Wenjun Lv, Zhibin Zhao, Zhuang Li, Han Wu, Sijie Li, Jianyuan Wang, Zhifang Wu, Xiaohui Li, Hongbo Zhu, Xiaofei Li
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Patent number: 11338343Abstract: A torsion shaft structure based multi-link all-electric servo synchronous bending machine, comprising a machine frame, a lower die fixedly connected to the machine frame and used for bending, a slider capable of moving up and down along the machine frame, and an upper die fixedly connected to the slider and cooperating with the lower die to perform bending, wherein the slider is left-right symmetrically connected to drive mechanisms for driving the slider to realize a transmission ratio adjustable motion.Type: GrantFiled: September 10, 2019Date of Patent: May 24, 2022Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Fengyu Xu, Yuxuan Lu, Sen Yang, Guoping Jiang, Min Xiao
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Patent number: 11323192Abstract: The present disclosure provides an adaptive modulation method for a naive Bayes classifier-based energy harvesting relay system. First, a sending end determines its modulation mode based on a status of a data buffer of a relay, so that sent data does not exceed a storage capability of the relay. Then, based on data sent by the sending end, and channel status information and energy harvesting status information within a period of time, the relay determines an optimal modulation mode used by the relay within the period of time. After that, the modulation mode, the channel status information, and the energy harvesting status information are used as training data to obtain a classification model based on a naive Bayes classifier algorithm. In this way, the relay can adaptively select a modulation mode when only knowing of channel information and energy information in a current timeslot.Type: GrantFiled: July 4, 2019Date of Patent: May 3, 2022Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Qi Zhu, Kang Liu, Hongbo Zhu, Longxiang Yang
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Patent number: 11312717Abstract: The present invention provides an organic nano-grid, a nano-polymer thereof and a preparation method therefor. The organic nano-grid has a general formula (I), and the nano-polymer has a general formula (II), wherein R1 is an alkyl chain, R2 is halogen or an electroactive group, and X may comprise a heteroatom such as N, O and S, and n is a natural number from 1 to 10. A nano-connection strategy is applied to the construction of a one-dimensional nano-polymer. The polymer starts from a monomer A2B2 to form a corresponding nano-polymer by a Friedel-Crafts polymerization cyclization reaction.Type: GrantFiled: January 26, 2018Date of Patent: April 26, 2022Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Linghai Xie, Wei Huang, Ying Wei, Dongqing Lin, Quanyou Feng, Hui Liu, Chunxiao Zhong
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Publication number: 20210399815Abstract: The present disclosure provides an adaptive modulation method for a naive Bayes classifier-based energy harvesting relay system. First, a sending end determines its modulation mode based on a status of a data buffer of a relay, so that sent data does not exceed a storage capability of the relay. Then, based on data sent by the sending end, and channel status information and energy harvesting status information within a period of time, the relay determines an optimal modulation mode used by the relay within the period of time. After that, the modulation mode, the channel status information, and the energy harvesting status information are used as training data to obtain a classification model based on a naive Bayes classifier algorithm. In this way, the relay can adaptively select a modulation mode when only knowing of channel information and energy information in a current timeslot.Type: ApplicationFiled: July 4, 2019Publication date: December 23, 2021Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Qi Zhu, Kang Liu, Hongbo Zhu, Longxiang Yang
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Publication number: 20210336097Abstract: A vertical blue LED includes: a conductive substrate, the conductive substrate including a first surface and a second surface opposite to the first surface a nitride epitaxial layer; a metal reflective layer, positioned on the first surface; a nitride epitaxial layer, positioned on a surface of the metal reflective layer and including a P-type GaN layer, a quantum well layer, a preparation layer, and an N-type GaN layer that are sequentially stacked along a direction perpendicular to the conductive substrate, wherein a thickness of the nitride epitaxial layer is less than a wavelength of blue light; an N-type electrode, positioned on a surface of the N-type GaN layer; and a P-type electrode, positioned on the second surface.Type: ApplicationFiled: July 9, 2021Publication date: October 28, 2021Applicant: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Yongjin WANG, Shuyu NI, Jialei YUAN