Patents by Inventor Yunfeng CAI
Yunfeng CAI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11947552Abstract: A method for discovering causality from data includes acquiring to-be-processed data, and obtaining a covariance matrix of the to-be-processed data; determining a first target column in the covariance matrix, taking the number of columns of the first target column as a first place in a rearrangement sequence, and obtaining a first upper triangular matrix according to the first target column; determining a position of the number of columns of the covariance matrix other than the first target column except the first place in the rearrangement sequence according to the first target column and the first upper triangular matrix, and obtaining an upper triangular matrix in each position determination; obtaining an adjacency matrix according to an upper triangular matrix and a rearrangement sequence obtained in final position determination; and generating directed acyclic graph (DAG) by using the adjacency matrix, and taking the DAG as causality discovery result of the to-be-processed data.Type: GrantFiled: September 19, 2022Date of Patent: April 2, 2024Assignee: BEIJING BAIDU NETCOM SCIENCE TECHNOLOGY CO., LTD.Inventors: Xu Li, Yunfeng Cai, Mingming Sun, Ping Li
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Publication number: 20240104008Abstract: A multi-drivers-in-the-loop driving testing platform is provided including at least a sensing simulation system, a vehicle dynamic simulation system, a driving simulator and a scene simulation system. The sensing simulation system is configured to generate object-level perception information, and send it to a vehicle control system; the driving simulator is configured to provide a driving environment and a driving scene for a human driver, output a driving instruction according to a driving intention of the human driver, and then send the driving instruction to the vehicle control system; the vehicle dynamic simulation system is configured to calculate state information according to control signals output by the vehicle control system; and the scene simulation system is configured to update the driving scene displayed in the driving simulator timely according to the vehicle state information. The disclosure saves costs of research and development and shortens cycles of research and development.Type: ApplicationFiled: May 13, 2021Publication date: March 28, 2024Inventors: Hong Chen, Shuo Cai, Haitao Ding, Yunfeng Hu, Xun Gong, Jiamei Lin, Qijun Chen, Zhuping Wang
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Publication number: 20230278126Abstract: The disclosure relates to the field of spray welding, and involves a method and a device for liquid spray welding, as well as the application method thereof. The method for liquid spray welding specifically comprises the following steps: S1: Solder to be spray-soldered is melted under the protection of an inert gas; S2: Then, the melted solder is spray-soldered while using ultrasonic focusing. The device includes a solder conversion mechanism which consists of a container; the cavity in the container is used for placing the solder; a spraying hole is arranged at the bottom of the container to connect with the cavity, and a heating mechanism is mounted along the outer wall of the container; a device for driving the solder spraying is used to control the frequency of an ultrasonic generating mechanism.Type: ApplicationFiled: September 1, 2022Publication date: September 7, 2023Inventors: Xuan ZHOU, Zhengdong TAN, Haiying WANG, Yunfeng CAI, Haiming WANG, Junkuan DU, Shihong CAI, Yanling HUANG, Shengli LI
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Publication number: 20230273932Abstract: A method for discovering causality from data includes acquiring to-be-processed data, and obtaining a covariance matrix of the to-be-processed data; determining a first target column in the covariance matrix, taking the number of columns of the first target column as a first place in a rearrangement sequence, and obtaining a first upper triangular matrix according to the first target column; determining a position of the number of columns of the covariance matrix other than the first target column except the first place in the rearrangement sequence according to the first target column and the first upper triangular matrix, and obtaining an upper triangular matrix in each position determination; obtaining an adjacency matrix according to an upper triangular matrix and a rearrangement sequence obtained in final position determination; and generating directed acyclic graph (DAG) by using the adjacency matrix, and taking the DAG as causality discovery result of the to-be-processed data.Type: ApplicationFiled: September 19, 2022Publication date: August 31, 2023Applicant: BEIJING BAIDU NETCOM SCIENCE TECHNOLOGY CO., LTD.Inventors: Xu LI, Yunfeng CAI, Mingming SUN, Ping LI
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Patent number: 11724326Abstract: The disclosure relates to the field of spray welding, and involves a method and a device for liquid spray welding, as well as the application method thereof. The method for liquid spray welding specifically comprises the following steps: S1: Solder to be spray-soldered is melted under the protection of an inert gas; S2: Then, the melted solder is spray-soldered while using ultrasonic focusing. The device includes a solder conversion mechanism which consists of a container; the cavity in the container is used for placing the solder; a spraying hole is arranged at the bottom of the container to connect with the cavity, and a heating mechanism is mounted along the outer wall of the container; a device for driving the solder spraying is used to control the frequency of an ultrasonic generating mechanism.Type: GrantFiled: September 1, 2022Date of Patent: August 15, 2023Assignee: Shenzhen Anewbest Electronic Technology Co., Ltd.Inventors: Xuan Zhou, Zhengdong Tan, Haiying Wang, Yunfeng Cai, Haiming Wang, Junkuan Du, Shihong Cai, Yanling Huang, Shengli Li
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Patent number: 11588331Abstract: Provided are a load transfer method and system in thunder and lightning weather. The method includes: detecting lightning and predicting a position and time of a lightning strike to obtain a lightning prediction result; determining a transmission line possibly struck by lightning in a power grid according to the lightning prediction result; determining a load transfer scheme; and before the lightning occurs, transferring at least part of loads on the transmission line possibly struck by lightning according to the load transfer scheme.Type: GrantFiled: August 7, 2020Date of Patent: February 21, 2023Assignees: STATE GRID JIANGSU ELECTRIC POWER CO., LTD., STATE GRID SUZHOU POWER SUPPLY COMPANY, STATE GRID JIANGSU ELECTRIC POWER CO., LTD. MARKETING CENTERInventors: Yunfeng Cai, Chong Tong, Ning Wang, Yang Xu, Huiwen Lu, Kang Dai, Wei Yin, Bowen Wu, Liang Wang, Jianqiang Miao
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Patent number: 11294097Abstract: A lightning prewarning-based method for active protection against a lightning strike on an important transmission channel includes collecting meteorological element data, and establishing a transmission line-specific lightning strike probability prewarning model; using a maximum probability of a lightning strike prewarning level as a lightning strike prewarning level; performing equivalence calculation on a large-scale regional power system, using a minimum sum of a power loss risk cost and a regulation cost as an optimized objective function, and establishing a power flow transfer optimization model; and comparing a sum of a regulation cost and load power loss risk cost caused after the tie line is disconnected if regulation is performed before a lightning strike, and a load power loss risk cost caused if regulation is not performed, and when the regulation cost is not greater than the load power loss risk cost, performing regulation before the lightning strike.Type: GrantFiled: November 10, 2021Date of Patent: April 5, 2022Assignee: STATE GRID JIANGSU ELECTRIC POWER CO., LTD. SUZHOU BRANCHInventors: Chong Tong, Yunfeng Cai, Jian Xu, Jun Wang, Vang Xu, Siyang Liao, Yuetao Wu, Jianlian Zhang, Xia Hua, Liang Wang, Liudi Fu, Bowen Wu
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Patent number: 11233395Abstract: Disclosed are a dynamic lightning protection method and system. The method includes detecting lightning in real time and tracking a position of a thunderstorm; and performing dynamic lightning protection and control on an electrical grid according to an electrical grid control strategy before the thunderstorm reaches or affects the electrical grid. Further disclosed is a dynamic lightning protection system.Type: GrantFiled: July 13, 2018Date of Patent: January 25, 2022Assignees: STATE GRID JIANGSU ELECTRIC POWER CO., LTD SUZHOU, STATE GRID JIANGSU ELECTRIC POWER CO., LTD, STATE GRID CORPORATION OF CHINAInventors: Chong Tong, Yunfeng Cai, Ziyang Zhang, Qing Wang, Kang Dai, Wei Yin
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Publication number: 20210066914Abstract: Provided are a load transfer method and system in thunder and lightning weather. The method includes: detecting lightning and predicting a position and time of a lightning strike to obtain a lightning prediction result; determining a transmission line possibly struck by lightning in a power grid according to the lightning prediction result; determining a load transfer scheme; and before the lightning occurs, transferring at least part of loads on the transmission line possibly struck by lightning according to the load transfer scheme.Type: ApplicationFiled: August 7, 2020Publication date: March 4, 2021Inventors: Yunfeng CAI, Chong TONG, Ning WANG, Yang XU, Huiwen LU, Kang DAI, Wei YIN, Bowen WU, Liang WANG, Jianqiang MIAO
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Publication number: 20200059093Abstract: Disclosed are a dynamic lightning protection method and system. The method includes detecting lightning in real time and tracking a position of a thunderstorm; and performing dynamic lightning protection and control on an electrical grid according to an electrical grid control strategy before the thunderstorm reaches or affects the electrical grid. Further disclosed is a dynamic lightning protection system.Type: ApplicationFiled: July 13, 2018Publication date: February 20, 2020Inventors: Chong TONG, Yunfeng CAI, Ziyang ZHANG, Qing WANG, Kang DAI, Wei YIN