Patents Assigned to Tsinghua University
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Patent number: 12149041Abstract: A terahertz radiator is based on coherent Smith-Purcell radiation amplified by stimulation. The terahertz radiator includes an electron emission source configured to emit electron beams and a pumping source configured to emit pumping signals. The pumping signal interacts with a primary grating structure to obtain preliminarily bunched electrons. The preliminarily bunched electrons interact with the primary grating structure to generate coherent Smith-Purcell radiation. The coherent Smith-Purcell radiation and the pumping signals vertically resonate in a primary resonant cavity structure, so that the electron bunching density is increased, and in turn, the coherent Smith-Purcell radiation is enhanced. A positive feedback process is formed by free electrons and the coherent Smith-Purcell radiation, and the coherent Smith-Purcell radiation amplified by stimulation and periodic bunched electron bunches are obtained.Type: GrantFiled: June 23, 2021Date of Patent: November 19, 2024Assignee: Tsinghua UniversityInventors: Fang Liu, Yuechai Lin, Jinyu Li, Yidong Huang, Kaiyu Cui, Xue Feng, Wei Zhang
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Patent number: 12149860Abstract: An infrared detector includes a thermoelectric element, an infrared light absorber located on the thermoelectric element, and an electrical signal detecting element. The infrared light absorber includes a plurality of carbon nanotubes entangled with each other to form a network structure and a plurality of carbon particles in the network structure. The electrical signal detecting element is configured to detect a change of an electrical signal of the thermoelectric element.Type: GrantFiled: March 29, 2021Date of Patent: November 19, 2024Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Yuan-Hao Jin, Qun-Qing Li, Shou-Shan Fan
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Patent number: 12143582Abstract: An decoding method is disclosed, including: parsing a bitstream to determine whether a current coding block is required to be partitioned; when the current coding block is required to be partitioned, parsing the bitstream to determine whether the current coding blocks is partitioned in a horizontal direction or a vertical direction; partitioning the current coding block into four first rectangular subblocks in the horizontal direction or four second rectangular subblocks in the vertical direction; and reconstructing the current coding block based on the four first rectangular subblocks or the four second rectangular subblocks.Type: GrantFiled: July 21, 2023Date of Patent: November 12, 2024Assignees: Huawei Technologies Co., Ltd, Tsinghua UniversityInventors: Changcai Lai, Xiaoran Cao, Yongbing Lin, Lingzhi Liu, Yun He
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Patent number: 12131543Abstract: A semantic-based method and apparatus for retrieving a perspective image, an electronic device and a computer-readable storage medium are provided. An method includes obtaining a perspective image for a space containing an inspected object therein. A semantic division on the perspective image is performed using a first method, to obtain a plurality of semantic region units. A feature extraction network is constructed using a second method. Based on the perspective image and each of the plurality of semantic region units, a feature of each semantic region unit is extracted using the feature extraction network. Based on the feature of each semantic region unit, an image most similar to the semantic region unit is retrieved from an image feature database, to assist in determining an inspected object in the semantic region unit.Type: GrantFiled: March 15, 2021Date of Patent: October 29, 2024Assignees: Tsinghua University, Nuctech Company LimitedInventors: Li Zhang, Zhiqiang Chen, Yuanjing Li, Yuxiang Xing, Fanhua Meng, Qiang Li, Wei Li, Gang Fu
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Patent number: 12124496Abstract: A method for determining an academic impact, including: pre-processing a citing paper to obtain pre-processed data; determining a category of an impact, on the citing paper, of each reference paper and ranking of contribution, to the citing paper, of each reference paper, according to the pre-processed data; determining a local influential factor, on the citing paper, of each reference paper, according to the category of the impact and the ranking of the contribution of each reference paper; and determining a global influential factor of each reference paper according to a global influential factor of the citing paper and the local influential factor.Type: GrantFiled: January 13, 2023Date of Patent: October 22, 2024Assignee: Research Institute of Tsinghua University In ShenzhenInventors: Jiangtao Wen, Yuxing Han, Wenqi Ji, Xi Li, Yunlong Deng
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Patent number: 12116627Abstract: Methods of sequencing and producing nucleic acid sequences are provided. Accordingly there are provided methods of sequencing a nucleic acid sequence comprising L-nucleotides comprising subjecting the nucleic acid sequence comprising the L-nucleotides to a chemical sequencing method. Also provided is a method of reverse transcribing a ribose nucleic acid sequence into a deoxyribose nucleic acid sequence comprising catalyzing reverse transcription of the ribose nucleic acid sequence with a Sulfolobus solfataricus P2 DNA polymerase IV (Dpo4).Type: GrantFiled: September 28, 2020Date of Patent: October 15, 2024Assignee: Tsinghua UniversityInventors: Ting Zhu, Xianyu Liu, Wenjun Jiang, Min Wang
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Patent number: 12117352Abstract: The invention relates to a method, a device and a system for monitoring the IGBT junction temperature, wherein the linear relationship between each turn-off DC bus ringing peak voltage and the corresponding turn-off IGBT junction temperature, the phase current directions, and the initial and secondary states of the half-bridge arms are used to accurately determine the monitoring time of the turn-off DC bus ringing peak voltage, thereby obtaining the IGBT junction temperature at a converter level with higher sensitivity. The IGBT junction temperature obtained using the junction temperature monitoring method provided by the invention is an appropriate converter-level parameter, which has a good application prospect in multi-IGBT junction temperature estimation.Type: GrantFiled: October 26, 2021Date of Patent: October 15, 2024Assignee: Tsinghua UniversityInventors: Pinjia Zhang, Yanyong Yang
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Patent number: 12114560Abstract: A carbon nanotube composite structure includes a carbon nanotube and a film-like structure. The carbon nanotube includes a p-type portion and an n-type portion. The film-like structure is a molybdenum disulfide film or a tungsten disulfide film, and the film-like structure covers the n-type portion.Type: GrantFiled: October 20, 2021Date of Patent: October 8, 2024Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Gao-Tian Lu, Yang Wei, Shou-Shan Fan, Yue-Gang Zhang
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Patent number: 12104984Abstract: Embodiments of the present disclosure belong to the field of valve sealing, and in particular, relate to a test device for simulating sealing performance of a one-way valve. A box is provided with a gas inlet pipe and a gas outlet pipe, the gas inlet pipe is communicated with a gas source, a detection device is communicated with the gas outlet pipe, the detection device is used to detect detection gas input into the box by the gas source, a sleeve is connected to the gas inlet pipe, one end of the sleeve is communicated with the gas source, the other end of the sleeve has a gas outlet, one end of a fitting piece is used to block the gas outlet, and the other end of the fitting piece is connected to a driving member, which is used to drive the fitting piece to move and rotate.Type: GrantFiled: May 24, 2022Date of Patent: October 1, 2024Assignee: Tsinghua UniversityInventors: Fei Guo, Qiyao Chen, Chong Xiang, Yijie Huang, Ganlin Cheng, Fan Zhang, Xiaohong Jia
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Patent number: 12095088Abstract: A method of preparing a lithium-ion battery electrode, S1, preparing a carbon nanotube raw material; S2, providing an electrode active material and a solvent; S3, mixing the carbon nanotube raw material and the electrode active material with the solvent to form a mixture, and stirring the mixture to form an electrode mixture; and S4, spraying the electrode mixture on a substrate to form an electrode layer, and removing the substrate and drying the electrode layer to form the lithium-ion battery electrode.Type: GrantFiled: October 20, 2021Date of Patent: September 17, 2024Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Zhen-Han Fang, Jia-Ping Wang, Shou-Shan Fan
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Patent number: 12073715Abstract: The present application discloses an edge cloud system, a server, and a cloud control platform. The edge cloud system includes: an edge cloud access gateway module configured to access data of the road side terminal, the vehicle terminal, the third party platform and the regional cloud; a standardized hierarchical sharing interface module connected to the edge cloud access gateway module, wherein the standardized hierarchical sharing interface module is configured to standardize and classify the data of the road side terminal, the vehicle terminal, the third party platform and the regional cloud accessed by the edge cloud access gateway module to form multiple levels of standardized data; wherein standardized data at each level of the multiple levels of standardized data is available to be called only by a module with corresponding level of that of the standardized data.Type: GrantFiled: May 27, 2021Date of Patent: August 27, 2024Assignees: CHINA INTELLECTUAL AND CONNECTED VEHICLES (BEIJING) RESEARCH INSTITUTE CO., LTD., Tsinghua UniversityInventors: Wenbo Chu, Keqiang Li, Xiaoping Du, Qiqige Wuniri, Bin Liu, Dongxin Lv
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Patent number: 12056125Abstract: A database processing method and an apparatus are provided, and may be applied to a database system. A tree structure is used to represent a join order and used as an input of a neural network, and different first attribute matrices are allocated to different brother nodes in the input tree structure. This helps the neural network comprehensively learn information about the join order, obtain representation information capable of differentiating the join order from another join order, and predict costs of the join order accurately based on the obtained representation information of the join order. Then, an optimizer selects a join order with lowest costs for a query statement based on the costs predicted by a cost prediction module.Type: GrantFiled: July 8, 2022Date of Patent: August 6, 2024Assignees: Huawei Technologies Co., Ltd., Tsinghua UniversityInventors: Guoliang Li, Xiang Yu, Di Yang
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Patent number: 12054393Abstract: A method for making a graphene nanoribbon composite structure includes providing a substrate including a plurality of protrusions spaced apart from each other. A graphene film is grown on a growth substrate, an adhesive layer is on a surface of the graphene film away from the growth substrate. After removing the growth substrate, the graphene film and the adhesive layer are cleaned with water or an organic solvent. The graphene film, the adhesive layer, and the substrate are combined and then are dried, so that a plurality of wrinkles are formed near the plurality of protrusions. The adhesive layer is removed, and after etching a surface of the graphene film away from the substrate, the graphene films except for the plurality of wrinkles are removed, to form a plurality of graphene nanoribbons.Type: GrantFiled: March 19, 2021Date of Patent: August 6, 2024Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Tian-Fu Zhang, Li-Hui Zhang, Yuan-Hao Jin, Qun-Qing Li, Shou-Shan Fan
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Patent number: 12050007Abstract: A low-carbon energy utilization system for steam and power cogeneration of oil field is provided, which includes a first water pump device, a second water pump device, electric heating devices, a liquid mixer, a fossil-fuel steam injection boiler, a steam mixer, a super-heater, and a new energy generation station. The electric heating devices are connected to the first water pump device. The liquid mixer is connected to the second water pump device and the electric heating devices. The fossil-fuel steam injection boiler is connected to the liquid mixer. The steam mixer is connected to the electric heating devices and the fossil-fuel steam injection boiler. The super-heater is connected to the steam mixer. The new energy generation station is used for supplying power to the electric heating devices.Type: GrantFiled: October 14, 2021Date of Patent: July 30, 2024Assignee: Tsinghua UniversityInventors: Yuxin Wu, Qi Liu, Junfu Lv, Man Zhang, Yang Zhang, Zhong Huang, Tuo Zhou, Qing Liu
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Patent number: 12039305Abstract: A method for a compilation, an electronic device and a readable storage medium are provided. The method for a compilation includes analyzing source program data to determine a target irregular branch, generating an update data flow graph according to the target irregular branch, and mapping the update data flow graph to a target hardware to complete the compilation.Type: GrantFiled: March 7, 2022Date of Patent: July 16, 2024Assignees: Beijing Superstring Academy of Memory Technology, Tsinghua UniversityInventors: Baofen Yuan, Shouyi Yin, Shaojun Wei
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Patent number: 12035273Abstract: A method for positioning a communication device includes: receiving measurement information between a node to be positioned and a set of reference nodes of at least one type, the measurement information including an initial pseudorange and initial orientation angle measurement information between the node to be positioned and a reference node, and the set of reference nodes including at least one reference node; and substituting the measurement information into a preset parametric formula to obtain positioning information of the node to be positioned, the parametric formula being used for indicating a possibility that the positioning information is a value of a preset variable, and the positioning information including position information, clock deviation information and orientation angle information of the node to be positioned.Type: GrantFiled: October 12, 2021Date of Patent: July 9, 2024Assignees: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Tsinghua UniversityInventors: Qianxi Lu, Yuan Shen, Yuanpeng Liu
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Patent number: 12033365Abstract: An image processing method and apparatus and a storage medium, wherein the method particularly includes firstly acquiring an image-to-be-trained sample and a label segmentation image corresponding to the image-to-be-trained sample; inputting the image-to-be-trained sample into an image segmentation model to be trained, obtaining a first image feature of a last one output layer in the image segmentation model and a second image feature of a second last output layer when the image-to-be-trained sample is being extracted by using the image segmentation model, outputting the corresponding segmented-image samples; based on the label segmentation image and the segmented-image samples, calculating the model loss function, optimizing the model parameter, and generating the image segmentation model that has been optimized; and inputting an acquired image to be processed into the image segmentation model that has been optimized, and generating segmented images corresponding to the image to be processed.Type: GrantFiled: December 27, 2021Date of Patent: July 9, 2024Assignee: Tsinghua UniversityInventors: Gao Huang, Shiji Song, Chaoqun Du
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Patent number: 12029484Abstract: The present disclosure provides a method of determining a distance and a height, including: measuring, a first distance, a second distance and a third distance from the security inspection device to the tested person as well as measuring a first height, a second height and a third height of the tested person; determining, a relationship between the first distance and a minimum distance threshold as well as a maximum distance threshold, a relationship between the second distance and the minimum distance threshold as well as the maximum distance threshold, and a relationship between the third distance and the minimum distance threshold as well as the maximum distance threshold; determining, a final distance from the security inspection device to the tested person and a final height of the tested person; and performing a pixel conversion and a size conversion on the pupil image of the tested person.Type: GrantFiled: February 24, 2021Date of Patent: July 9, 2024Assignees: NUCTECH COMPANY LIMITED, Tsinghua UniversityInventors: Zhiqiang Chen, Yuanjing Li, Xianghao Wu, Haitao Zhang, Jundi Dai, Shaozhi Zhao, Guocheng An
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Publication number: 20240219311Abstract: The disclosure provides a system for electromagnetic monitoring of active cracks in a concrete dam. The system includes at least four electromagnetic signal acquisition devices and a main control module. Each electromagnetic signal acquisition device includes: an electromagnetic monitoring sensor, an electromagnetic signal acquisition module, a power supply module and a first wireless communication module, for collecting and extracting electromagnetic radiation signals generated by the active cracks in the concrete dam. The main control module includes: a second wireless communication module, a CPU, a data storage unit and a data display unit, for processing the electromagnetic radiation signals received by the second wireless communication module, positioning locations of the active cracks and quantifying sizes of the active cracks.Type: ApplicationFiled: June 6, 2023Publication date: July 4, 2024Applicant: Tsinghua UniversityInventors: Songling Huang, Lisha Peng, Xinjie Yu, Jinghua Zhang, Shisong Li, Shuzhi Wen
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Patent number: 12026263Abstract: A method and an apparatus for protecting privacy of an ophthalmic patient and a storage medium are disclosed. The method includes: acquiring an examination video of the ophthalmic patient; extracting image features of each frame of images in the examination video, performing region division on each frame of the images according to position information of organs in the image features, and obtaining a region to be precisely reconstructed and a region to be roughly reconstructed according to a region division result; performing three-dimensional (3D) reconstruction on the region to be precisely reconstructed and the region to be roughly reconstructed, to obtain 3D reconstruction data corresponding to each frame of the images; and rendering all the 3D reconstruction data into a 3D reconstruction video.Type: GrantFiled: December 10, 2021Date of Patent: July 2, 2024Assignees: Zhongshan Ophthalmic Center, Sun Yat-Sen University, Tsinghua UniversityInventors: Haotian Lin, Feng Xu, Yahan Yang, Ruixin Wang, Junfeng Lyu