Patents Assigned to Peking University
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Patent number: 11461654Abstract: The present invention provides a multi-agent cooperation decision-making and training method, including the following steps: S1: encoding, by an encoder, local observations obtained by agents by using a multi-layer perceptron or a convolutional neural network as feature vectors in a receptive field; S2: calculating, by a graph convolution layer, relationship strength between the agents by using a relationship unit of a multi-headed attention mechanism, integrating, by a relationship convolution kernel of the relationship unit, the feature vectors in the receptive field into new feature vectors, and iterating the graph convolution layer for multiple times to obtain a relationship description of the multi-headed attention mechanism in a larger receptive field and at a higher order; S3: splicing the feature vectors in the receptive field and the new feature vectors integrated by the graph convolution layer, sending the spliced vectors to a value network, wherein the value network selects and performs an action dType: GrantFiled: October 17, 2019Date of Patent: October 4, 2022Assignee: Peking UniversityInventors: Zongqing Lu, Jiechuan Jiang
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Patent number: 11460341Abstract: A wafer scale ultrasonic sensor assembly includes a wafer substrate, an ultrasonic element, first and second protective layers, conductive wires, a transmitting material, an ASIC, a conductive bump, and a soldering portion. The wafer substrate includes a via. The ultrasonic element is exposed to the via. The conductive wires are on the first protective layer and connected to the ultrasonic element. The second protective layer covers the conductive wires, and the second protective layer has an opening corresponding to the ultrasonic element. The transmitting material contacts the ultrasonic element. The ASIC is connected to the wafer substrate, so that the via forms a space between the ASIC and the ultrasonic element. The conductive pillar is in a via defined through the ASIC, the wafer substrate, and the first protective layer, and the conducive pillar is respectively connected to the conductive wires and the soldering portion.Type: GrantFiled: June 3, 2019Date of Patent: October 4, 2022Assignees: j-Metrics Technology Co., Ltd., Peking University Shenzhen Graduate SchoolInventors: Yu-Feng Jin, Sheng-Lin Ma, Yi-Hsiang Chiu, Hung-Ping Lee, Dan Gong
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Publication number: 20220277791Abstract: An operating circuit and an operating method of a resistive random-access memory are provided, the operating circuit includes: at least one capacitance connected in series with the resistive random-access memory, so that the resistive random-access memory is grounded through the at least one capacitance. The operating method includes: connecting at least one capacitance in series with a resistive random-access memory, so that the resistive random-access memory is grounded through the capacitance; applying a forming pulse voltage or a set pulse voltage on the resistive random-access memory to achieve a forming operation or a set operation of the resistive random-access memory.Type: ApplicationFiled: August 2, 2019Publication date: September 1, 2022Applicant: Peking UniversityInventors: Peng HUANG, Yizhou ZHANG, Yulin FENG, Jinfeng KANG, Xiaoyan LIU, Lifeng LIU
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Patent number: 11397890Abstract: The present application discloses a cross-media retrieval method based on deep semantic space, which includes a feature generation stage and a semantic space learning stage. In the feature generation stage, a CNN visual feature vector and an LSTM language description vector of an image are generated by simulating a perception process of a person for the image; and topic information about a text is explored by using an LDA topic model, thus extracting an LDA text topic vector. In the semantic space learning phase, a training set image is trained to obtain a four-layer Multi-Sensory Fusion Deep Neural Network, and a training set text is trained to obtain a three-layer text semantic network, respectively. Finally, a test image and a text are respectively mapped to an isomorphic semantic space by using two networks, so as to realize cross-media retrieval. The disclosed method can significantly improve the performance of cross-media retrieval.Type: GrantFiled: August 16, 2017Date of Patent: July 26, 2022Assignee: Peking University Shenzhen Graduate SchoolInventors: Wenmin Wang, Mengdi Fan, Peilei Dong, Ronggang Wang, Ge Li, Shengfu Dong, Zhenyu Wang, Ying Li, Hui Zhao, Wen Gao
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Patent number: 11379711Abstract: A video action detection method based on a convolutional neural network (CNN) is disclosed in the field of computer vision recognition technologies. A temporal-spatial pyramid pooling layer is added to a network structure, which eliminates limitations on input by a network, speeds up training and detection, and improves performance of video action classification and time location. The disclosed convolutional neural network includes a convolutional layer, a common pooling layer, a temporal-spatial pyramid pooling layer and a full connection layer. The outputs of the convolutional neural network include a category classification output layer and a time localization calculation result output layer. The disclosed method does not require down-sampling to obtain video clips of different durations, but instead utilizes direct input of the whole video at once, improving efficiency.Type: GrantFiled: August 16, 2017Date of Patent: July 5, 2022Assignee: Peking University Shenzhen Graduate SchoolInventors: Wenmin Wang, Zhihao Li, Ronggang Wang, Ge Li, Shengfu Dong, Zhenyu Wang, Ying Li, Hui Zhao, Wen Gao
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Publication number: 20220186210Abstract: Provided are a method for identifying functional elements of a genomic sequence and a library used for identifying functional elements of a genomic sequence.Type: ApplicationFiled: March 26, 2020Publication date: June 16, 2022Applicants: Peking University, Edigene Inc.Inventors: Wensheng WEI, Yinan WANG, Yuexin ZHOU, Xinyi ZHANG, Di YUE, Ying LIU
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Patent number: 11347979Abstract: A method and a device for MCMC framework-based sub-hypergraph matching are provided. Matching of object features is performed by constructing sub-hypergraphs. In a large number of actual images and videos, objects vary constantly, and contain various noise points as well as other interference factors, which makes image object matching and searching very difficult. Perform object feature matching by representing the appearance and positions of objects by sub-hypergraphs allows for faster and more accurate image matching. Furthermore, a sub-hypergraph has several advantages over a graph or a hypergraph: on one hand, a sub-hypergraph has more geometric information (e.g. angle transformation, rotation, scale, etc.) than a graph, and has a lower degree of difficulty and better extensibility than a hypergraph. On the other hand, the disclosed method and device have stronger capabilities to resist interference and good robustness, and are adaptable to more complex settings, especially with outliers.Type: GrantFiled: March 10, 2016Date of Patent: May 31, 2022Assignee: Peking University Shenzhen Graduate SchoolInventors: Wenmin Wang, Ruonan Zhang, Ronggang Wang, Ge Li, Shengfu Dong, Zhenyu Wang, Ying Li, Hui Zhao, Wen Gao
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Patent number: 11349116Abstract: Provided are a MoSxOy/carbon nanocomposite material, a preparation method therefor and a use thereof. In the MoSxOy/carbon nanocomposite material, 2.5?x?3.1, 0.2?y?0.7, and the mass percent of MoSxOy is 5%-50% based on the total mass of the nanocomposite material. When the MoSxOy/carbon nanocomposite material is used as a catalyst for an electrocatalytic hydrogen evolution reaction, the current density is 150 mA/cm2 or more at an overpotential of 300 mV. The difference between this performance and the performance of a commercial 20% Pt/C catalyst is relatively small, or even equivalent; and this performance is far better than the catalytic performance of an existing MOS2 composite material. The MoSxOy/carbon nanocomposite material also has a good catalytic stability, and after 8,000 catalytic cycles, the current density thereof is only decreased by 3%, thus exhibiting a very good catalytic performance and cycle stability.Type: GrantFiled: July 25, 2017Date of Patent: May 31, 2022Assignee: Peking UniversityInventors: Maolin Zhai, Pengfei Cao, Jing Peng, Jiuqiang Li
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Publication number: 20220119822Abstract: An expression method, a vector and a vector composition are provided. In particular, a method for exogenously expressing a complex biological system in host cells, as well as a vector and a vector composition for the method are provided.Type: ApplicationFiled: May 11, 2018Publication date: April 21, 2022Applicant: Peking UniversityInventors: Jianguo Yang, Xiaqing Xie, Nan Xiang, Zhexian Tian, Ray Dixon, Yiping Wang
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Patent number: 11303793Abstract: An imaging system includes an event camera configured to capture a first image of a scene. The system also includes a shutter camera collocated with the event camera, where the shutter camera is configured to capture a second image of the scene. The system also includes a processor operatively coupled to the event camera and the shutter camera. The processor is configured to apply guided event filtering (GEF) on the first image and the second image. The processor is also configured to generate a third image based on filtering of the first image and the second image.Type: GrantFiled: April 12, 2021Date of Patent: April 12, 2022Assignees: Northwestern University, Peking UniversityInventors: Oliver Strider Cossairt, Boxin Shi, Zihao Wang, Peiqi Duan, Aggelos K. Katsaggelos, Tiejun Huang
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Patent number: 11293050Abstract: Disclosed are a method for marking 5-formyl cytosine and the use thereof in single base resolution sequencing. The method for marking the 5-formyl cytosine comprises the following steps of: (1) preparing a DNA or RNA sample; and (2) mixing the DNA or RNA sample with a buffer solution and a compound R1—CH2—CN to obtain a marking reaction system; and reacting the compound R1—CH2—CN therein with the 5-formyl cytosine in DNA and RNA molecules, and thereby achieving the marking of the 5-formyl cytosine; the reaction process is as in (I) below: wherein, R1 is an electron withdrawing group next to the CH2 group, preferably —CN, (II) or (III), and more preferably —CN; R is a DNA or RNA molecule connected to the 5-formyl cytosine; and the pH value of the marking reaction system is 7.5-9. On this basis, also provided in the present invention is a sequencing analysis method for the 5-formyl cytosine.Type: GrantFiled: February 26, 2018Date of Patent: April 5, 2022Assignee: Peking UniversityInventors: Chengqi Yi, Chenxu Zhu, Bo Xia
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Patent number: 11293015Abstract: The present invention provides a Diels-Alderase and use thereof, and belongs to the field of gene engineering technology. The Diels-Alderase is MaDA, and its amino acid sequence and gene sequence are represented by SEQ ID Nos. 1 and 2, respectively. The present invention also provides MaDA-1 and MaDA-2, both of which are homologous proteins of MaDA, and their amino acid sequences are represented by SEQ ID Nos. 10 and 12, respectively. The present invention has discovered that MaDA and its homologous proteins from Morus alba can stereospecifically synthesize natural products of endo configuration, and prepare D-A type natural products and their analogs in vitro using chalcones and dehydroprenyl-containing compounds as substrates, which helps to develop and utilize the medicinal value of such natural products, and also provides a possibility to synthesize other six-membered ring-containing important chemical precursors or natural products.Type: GrantFiled: November 18, 2020Date of Patent: April 5, 2022Assignees: Peking University, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical CollegeInventors: Xiaoguang Lei, Jungui Dai, Lei Gao, Cong Su
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Patent number: 11296033Abstract: The invention discloses a fan-out multi-device hybrid integrated flexible micro-system and an associated fabrication method in the field of microelectronics. The flexible microsystem uses microelectromechanical system (MEMS) chips and/or integrated circuit (IC) chips as the device units, flexible isolation trenches filled with flexible polymer as a flexible connection between the device units, and metal wiring layers to provide electrical interconnections between the device units. The disclosed multi-device hybrid integrated flexible micro-system completed by a fan-out method not only retains excellent electrical performance of silicon-based devices, but also realizes flexibility of the overall micro-system, and has stable structure and reliable performance.Type: GrantFiled: December 11, 2018Date of Patent: April 5, 2022Assignee: Peking UniversityInventors: Wei Wang, Xiao Dong
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Patent number: 11270624Abstract: The present disclosure includes a shift register unit circuit, including input storing module, configured to receive an input signal at an input terminal and store the input signal; storage retrieving module, configured to retrieve the input signal from the input storing module under influence of at least a first clock signal; output driving module, configured to transfer the input signal to an first output terminal under control of the storage retrieving module; and pulling-down and maintaining module, configured to pull down a voltage at the output terminal to low voltage level after output operation is completed, and maintain the voltage at low voltage level until the output driving module receives a next input signal. The present disclosure also includes a gate driver circuit including such shift register units and a method for generating gate driving signal.Type: GrantFiled: May 11, 2017Date of Patent: March 8, 2022Assignee: Peking University Shenzhen Graduate SchoolInventors: Shengdong Zhang, Yihua Ma, Congwei Liao
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Publication number: 20220064633Abstract: Compositions, kits and methods are provided for genetic screening using one or more sets of guide RNA constructs having internal barcodes (“iBAR”). Each set has three or more guide RNA constructs targeting the same genomic locus, but embedded with different iBAR sequences.Type: ApplicationFiled: December 20, 2019Publication date: March 3, 2022Applicants: Peking University, Edigene Biotechnology Inc.Inventors: Wensheng WEI, Shiyou ZHU, Zhongzheng CAO, Zhiheng LIU, Yuan HE, Pengfei YUAN
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Patent number: 11238274Abstract: An image feature extraction method for person re-identification includes performing person re-identification by means of aligned local descriptor extraction and graded global feature extraction; performing the aligned local descriptor extraction by processing an original image by affine transformation and performing a summation pooling operation on image block features of same regions to obtain an aligned local descriptor; reserving spatial information between inner blocks of the image for the aligned local descriptor; and performing the graded global feature extraction by grading a positioned pedestrian region block and solving a corresponding feature mean value to obtain a global feature. The method can resolve the problem of feature misalignment caused by posture changes of pedestrian, etc., and eliminate the effect of unrelated backgrounds on re-recognition, thus improving the precision and robustness of person re-identification.Type: GrantFiled: December 27, 2017Date of Patent: February 1, 2022Assignee: Peking UniversityInventors: Wenmin Wang, Yihao Zhang, Ronggang Wang, Ge Li, Shengfu Dong, Zhenyu Wang, Ying Li, Wen Gao
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Patent number: 11221274Abstract: The application discloses a light scattering parameter measurement system and its measurement method. Dual-frequency scattering interference technology is adopted to obtain distributed measurement of Rayleigh scattering parameters in an optical fiber. The Rayleigh scattering coefficient r and phase retardance ? are modulated on different components of the interference signal respectively by using the dual-frequency interference technology. The Rayleigh scattering coefficient r and phase retardance ? can be decoupled by simple filtering, to obtain separate measurements. A linear stretch is applied to the optical fiber under test, to add uniform phase change signals at all positions of the optical fiber under test. As a result, the term containing only Rayleigh scattering coefficient r can be extracted by low-pass filtering. The direct measurement of Rayleigh scattering parameters is of great significance to fundamental and application researches related to Rayleigh scattering of optical fiber.Type: GrantFiled: December 9, 2020Date of Patent: January 11, 2022Assignee: Peking UniversityInventors: Xiangge He, Min Zhang, Fei Liu, Lijuan Gu, Hailong Lu
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Patent number: 11201323Abstract: A MoSx/carbon black nanocomposite material, and a manufacturing method and application thereof. In the MoSx/carbon black nanocomposite material, 2?x?2.3. The weight percentage of MoSx as part of the total weight of the nanocomposite material is 5-50%. The MoSx/carbon black nanocomposite material has 20% higher performance when compared to a commercial 20% Pt/C catalyst. The manufactured MoSx/carbon black nanocomposite material also has excellent catalytic stability. There is no significant decrease in catalytic performance of the material after 5,000 catalytic cycles.Type: GrantFiled: July 25, 2017Date of Patent: December 14, 2021Assignee: Peking UniversityInventors: Maolin Zhai, Pengfei Cao, Jing Peng, Jiuqiang Li
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Publication number: 20210372703Abstract: A method for determining a fugitive emission factor (EF) and a leakage rate of a combustion source. For a combustion source capable of performing stack emission and fugitive emission, an organized EF, a fugitive EF, and a leakage rate of fugitive emission are respectively obtained through calculation based on material balance. The method solves the problem that it is impossible to collect a total amount of smoke and to quantify its volume in a field test and the problem that a conventional carbon mass balance (CMB) method cannot distinguish organized leakage from fugitive leakage. The method can be used not only for determining gas leaked from residential indoor stoves using coal, biomass, etc., but also for determining fugitive emissions from other sources, such as the amount of gas leaked to the surrounding environment through the body of a brick kiln in a brick and tile factory.Type: ApplicationFiled: September 30, 2020Publication date: December 2, 2021Applicant: Peking UniversityInventors: Guofeng Shen, Shu Tao, Wei Du, Yuanchen Chen
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Patent number: 11182602Abstract: The present application discloses a method and a system for person re-identification, the method including: inputting a training set to a model-to-be-trained, and determining a single-class label and memory features of each image data in the training set; determining multi-class labels through positive label prediction according to the single-class labels and a memory feature set; determining classification scores according to image features of each image data in the training set and the memory feature set; determining a multi-label classification loss according to the multi-class labels and the classification scores; and updating and training the model-to-be-trained to obtain a re-identification model according to the multi-label classification loss.Type: GrantFiled: September 15, 2020Date of Patent: November 23, 2021Assignee: Peking UniversityInventors: Shiliang Zhang, Dongkai Wang