Patents by Inventor Siwei Liu
Siwei Liu 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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Publication number: 20240129489Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of processing video data includes determining, for a conversion between a video block of a video and a bitstream of the video, a gradient of a prediction vector at a sub-block level for the video block according to a rule, wherein the rule specifies to use a same gradient value is assigned for all samples within a sub-block of the video block; and performing the conversion based on the determining.Type: ApplicationFiled: November 16, 2023Publication date: April 18, 2024Inventors: Kai Zhang, Yuwen He, Li Zhang, Hongbin Liu, Tianliang Fu, Junru Li, Siwei Ma
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Patent number: 11956448Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of processing video data includes determining, for a conversion between a video block of a video and a bitstream of the video, a gradient of a prediction vector at a sub-block level for the video block according to a rule, wherein the rule specifies to use a same gradient value is assigned for all samples within a sub-block of the video block; and performing the conversion based on the determining.Type: GrantFiled: December 7, 2022Date of Patent: April 9, 2024Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.Inventors: Kai Zhang, Yuwen He, Li Zhang, Hongbin Liu, Tianliang Fu, Junru Li, Siwei Ma
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Patent number: 11917830Abstract: A NAND ferroelectric memory cell with a three-dimensional structure and a preparation method thereof are provided, the ferroelectric memory cell comprises: an oxide insulating layer, a channel layer, a channel buffer layer, a ferroelectric layer, and/or a gate buffer layer, and a gate arranged successively from the inside to the outside. In the memory cell of the present disclosure, the buffer layer has the following effects: 1. It can induce the crystallization of ferroelectric film to form ferroelectric phase; 2. It can reduce adverse effects caused by different crystalline characteristics of the channel layer and the ferroelectric layer, improve the quality and uniformity of the deposited film; 3. It can enhance the interface property of the channel layer, reduce leakage current, and enhance endurance of the device. Therefore, the buffer layer can improve the overall storage property and homogeneity of memory cells with a three-dimensional structure.Type: GrantFiled: September 1, 2021Date of Patent: February 27, 2024Assignee: XIANGTAN UNIVERSITYInventors: Min Liao, Siwei Dai, Yanwei Huan, Qijun Yang, Zhaotong Liu, Yichun Zhou
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Publication number: 20230195301Abstract: A text input method and apparatus based on a virtual keyboard are provided, which relate to the field of human-computer interaction, and resolve a problem of how to complete text input based on the virtual keyboard. The method includes an electronic device that detects key points of a first hand based on an image including the first hand after obtaining the image including the first hand, and projects a virtual keyboard on the first hand based on the key points of the first hand. Further, after obtaining an image including the first hand and a finger of a second hand, the electronic device identifies, based on the image including the first hand and the finger of the second hand, a contact state or a pressing state between the finger of the second hand and the first hand.Type: ApplicationFiled: February 24, 2023Publication date: June 22, 2023Inventors: Jiajie YUAN, Siwei LIU, Menghan ZHANG, Haitao WANG, Peng ZHANG
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Publication number: 20230171467Abstract: A screen interaction method and apparatus for an electronic device are disclosed, to determine a target user from a plurality of users and control a picture displayed on a screen of the electronic device based on an action of the target user. The method includes: obtaining, by using a camera, an image including the plurality of users in front of a screen, recognizing respective actions of the plurality of users in the image based on the image including the plurality of users, comparing the actions of the plurality of users with a preset action, determining a user who performs an action matching the preset action as the target user, and controlling a picture displayed on the screen of the electronic device based on the action of the target user.Type: ApplicationFiled: January 13, 2023Publication date: June 1, 2023Inventors: Siwei LIU, Menghan ZHANG, Ming LI, Haitao WANG, Peng ZHANG
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Patent number: 11507190Abstract: A gesture control method applied to a virtual reality (VR) device, where gesture location information of a user of the VR device is obtained, a depth distance from a depth sensor to a hand of the user is detected using the depth sensor, and a hand movement area of the user is divided into a selection area and a command area based on a result of comparing the depth distance with a preset depth threshold. When the detected depth distance is not greater than the preset depth threshold, the user may select a to-be-operated object on a current display page, and when the detected depth distance is greater than the preset depth threshold, the user may perform a command operation on the to-be-operated object.Type: GrantFiled: January 28, 2019Date of Patent: November 22, 2022Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Siwei Liu, Wenliang Chang, Hongkun Luo
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Patent number: 11370886Abstract: The invention discloses a polymer with a low dielectric constant and a molecular structure design method capable of reducing the dielectric constant of the polymer. A straight-chain rigid group is introduced into a meta-position of a side group benzene ring or diphenyl chain segment structure by using the designability of a molecular chain side group of a polymer; and a free volume hole with a larger size is formed in the material through loose rotation of the side group benzene ring to inhibit molecular chain deposition, thereby reducing the dielectric constant of the polymer material. The design method is simple, is suitable for a common high-performance polymer material, can be applied to preparation of a low-dielectric polymer material, is suitable for the field of new and high technology industries such as electronics, microelectronics, information and aerospace and is especially suitable for the field of super-large-scale integrated circuits.Type: GrantFiled: February 1, 2018Date of Patent: June 28, 2022Assignee: SUN YAT-SEN UNIVERSITYInventors: Yi Zhang, Chao Qian, Jiarui Xu, Runxin Bei, Siwei Liu, Zhenguo Chi
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Publication number: 20200295268Abstract: An organic light-emitting material, a method for the preparation thereof and use thereof are provided. The organic light-emitting material is a novel organic light-emitting material containing phosphine, has a high electron-transport property and a high fluorescence quantum efficiency, can be used as an emitting layer material and/or an electron transport layer material in an OLED element. Thus, an emitting layer and an electron transport layer in a traditional OLED element can be combined as one layer, thereby simplifying the structure and preparation process of the OLED element. Also, the organic light-emitting material has a specific response to oxygen, metal ions, etc., so that the organic light-emitting material can also be applied in the fields of chemo-biological detection, bio-imaging, anti-counterfeiting, etc. There are advantages of simple synthesis and purification, high yield, and adjustment of its luminous wavelength, luminous efficiency, etc. by introducing different functional groups.Type: ApplicationFiled: January 9, 2018Publication date: September 17, 2020Inventors: Xianjie Li, Yuanchun Wu, Poyen Lu, Tao Yu, Qiuyi Huang, Zongliang Xie, Depei Ou, Leyu Wang, Zhenguo Chi, Yi Zhang, Siwei Liu, Jiarui Xu
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Patent number: 10400567Abstract: The invention discloses a pipeline descaling and rock stratum fracturing device based on electro-hydraulic pulse shock waves, comprising a ground low-voltage control device, a transmission cable and an electro-hydraulic pulse shock wave transmitter.Type: GrantFiled: September 29, 2016Date of Patent: September 3, 2019Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Yi Liu, Fuchang Lin, Yuan Pan, Qin Zhang, Hua Li, Zhiyuan Li, Siwei Liu
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Patent number: 10319168Abstract: Provided are a quality control method for banknote identification and a quality control system for banknote identification. The quality control method for banknote identification includes: obtaining a multispectral signal collected by a contact image sensor (CIS); extracting a first eigenvalue of the multispectral signal; obtaining a corresponding second eigenvalue according to the first eigenvalue and a pre-set correction conversion value; and inputting the second eigenvalue into a banknote classifier to obtain a corresponding banknote classification result.Type: GrantFiled: July 13, 2015Date of Patent: June 11, 2019Assignee: GRG Banking Equipment Co., Ltd.Inventors: Siwei Liu, Rongqiu Wang, Gang Lei, Zheng Zhao
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Publication number: 20190155397Abstract: A gesture control method applied to a virtual reality (VR) device, where gesture location information of a user of the VR device is obtained, a depth distance from a depth sensor to a hand of the user is detected using the depth sensor, and a hand movement area of the user is divided into a selection area and a command area based on a result of comparing the depth distance with a preset depth threshold. When the detected depth distance is not greater than the preset depth threshold, the user may select a to-be-operated object on a current display page, and when the detected depth distance is greater than the preset depth threshold, the user may perform a command operation on the to-be-operated object.Type: ApplicationFiled: January 28, 2019Publication date: May 23, 2019Inventors: Siwei Liu, Wenliang Chang, Hongkun Luo
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Publication number: 20190017362Abstract: The invention discloses a pipeline descaling and rock stratum fracturing device based on electro-hydraulic pulse shock waves, comprising a ground low-voltage control device, a transmission cable and an electro-hydraulic pulse shock wave transmitter.Type: ApplicationFiled: September 29, 2016Publication date: January 17, 2019Inventors: Yi LIU, Fuchang LIN, Yuan PAN, Qin ZHANG, Hua LI, Zhiyuan LI, Siwei LIU
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Publication number: 20180040186Abstract: Provided are a quality control method for banknote identification and a quality control system for banknote identification. The quality control method for banknote identification includes: obtaining a multispectral signal collected by a contact image sensor (CIS); extracting a first eigenvalue of the multispectral signal; obtaining a corresponding second eigenvalue according to the first eigenvalue and a pre-set correction conversion value; and inputting the second eigenvalue into a banknote classifier to obtain a corresponding banknote classification result.Type: ApplicationFiled: July 13, 2015Publication date: February 8, 2018Applicant: GRG Banking Equipment Co., Ltd.Inventors: Siwei Liu, Rongqiu Wang, Gang Lei, Zheng Zhao
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Patent number: 9827599Abstract: A banknote recognition and classification method and system are provided. In the method and system, a large number of reliable samples which are easy to acquire currently are used to establish a sample signal degradation model which meets application requirements by means of a statistical method, sample information is input into the banknote sample signal degeneration model to acquire various banknote sample information corresponding to the brand new banknotes to be learned; the various banknote sample information is input to perform classifier learning, and a banknote classification model is output; then a classifier learns to perform classification and recognition on a sample to be recognized.Type: GrantFiled: January 23, 2014Date of Patent: November 28, 2017Assignee: GRG Banking Equipment Co., Ltd.Inventors: Tiancai Liang, Panfeng Luo, Siwei Liu, Dingxi Chen, Weifeng Wang
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Patent number: 9580664Abstract: The present invention relates to a catalytic conversion process for improving the product distribution, characterized in that a feedstock oil of good quality is contacted with a hot regenerated catalyst having a lower activity in a reactor to carry out a cracking reaction, the reaction product is separated from the spent catalyst to be regenerated, then the reaction product is fed into a separation system, and the spent catalyst to be regenerated is stripped, regenerated and recycled in the process. The isobutene content in the liquefied petroleum gas (LPG) produced by the process is increased by a factor of more than 30%, and the olefin content in the gasoline composition may be increased to more than 30 wt. %. The product distribution is optimized, and the yields of dry gas and coke are decreased, so as to sufficiently utilize the petroleum resources.Type: GrantFiled: September 23, 2011Date of Patent: February 28, 2017Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPECInventors: Youhao Xu, Shouye Cui, Siwei Liu, Nan Jiang, Yinliang Liu
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Patent number: 9519838Abstract: The present invention relates to a character recognition method. Same comprises: step 1: reading in a character image; step 2: image preprocessing; step 3: character splitting; step 4: edge extraction; utilizing an edge detection operator to detect edge points of characters; step 5: feature extraction, where the features of each edge point of each character are all expressed with distances running from other edge points of the character to the edge point and are represented by eigenvectors (Pk, Pk, . . . P); step 6: feature processing, mapping the eigenvectors (Pk, Pk, . . . P) into a matrix, T, thus allowing all characters to be identical in eigenvector dimension; and, step 7: template matching recognition.Type: GrantFiled: June 26, 2013Date of Patent: December 13, 2016Assignee: GRG Banking Equipment Co., Ltd.Inventors: Tiancai Liang, Kun Wang, Weifeng Wang, Siwei Liu
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Publication number: 20160358399Abstract: A method and system for recognizing a bill with an abnormal thickness. The method comprises: collecting the thickness signals of the bills in multi-channel to obtain multi-channel thickness signals (501); preprocessing the multi-channel thickness signals (502); searching the mutation points inside the multi-channel thickness signals according to a predetermined rule to form a mutation point set (503); determining the abnormal thickness suspicious regions of the multi-channel thickness signals according to the mutation point set (504); determining the thickness signal abnormal regions of the multi-channel thickness signals according to the abnormal thickness suspicious regions, and marking the positions and the area of the thickness signal abnormal regions (505); fusing the positions and the area of the thickness signal abnormal regions of the multi-channel thickness signals to obtain a fused result (506); recognizing the fused result to obtain a recognizing result (507).Type: ApplicationFiled: September 29, 2014Publication date: December 8, 2016Applicant: GRG Banking Equipment Co., Ltd.Inventors: Tiancai LIANG, Xiaoliang WANG, Guang CHEN, Siwei LIU
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Publication number: 20160121370Abstract: A banknote recognition and classification method and system are provided. In the method and system, a large number of reliable samples which are easy to acquire currently are used to establish a sample signal degradation model which meets application requirements by means of a statistical method, sample information is input into the banknote sample signal degeneration model to acquire various banknote sample information corresponding to the brand new banknotes to be learned; the various banknote sample information is input to perform classifier learning, and a banknote classification model is output; then a classifier learns to perform classification and recognition on a sample to be recognized.Type: ApplicationFiled: January 23, 2014Publication date: May 5, 2016Applicant: GRG Banking Equipment Co., Ltd.Inventors: Tiancai Liang, Panfeng Luo, Siwei Liu, Dingxi Chen, Weifeng Wang
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Publication number: 20150356372Abstract: The present invention relates to a character recognition method. Same comprises: step 1: reading in a character image; step 2: image preprocessing; step 3: character splitting; step 4: edge extraction; utilizing an edge detection operator to detect edge points of characters; step 5: feature extraction, where the features of each edge point of each character are all expressed with distances running from other edge points of the character to the edge point and are represented by eigenvectors (Pk, Pk, . . . P); step 6: feature processing, mapping the eigenvectors (Pk, Pk, . . . P) into a matrix, T, thus allowing all characters to be identical in eigenvector dimension; and, step 7: template matching recognition.Type: ApplicationFiled: June 26, 2013Publication date: December 10, 2015Applicant: GRG Banking Equipment Co., Ltd.Inventors: Tiancai Liang, Kun Wang, Weifeng Wang, Siwei Liu
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Publication number: 20130211167Abstract: The present invention relates to a catalytic conversion process for improving the product distribution, characterized in that a feedstock oil of good quality is contacted with a hot regenerated catalyst having a lower activity in a reactor to carry out a cracking reaction, the reaction product is separated from the spent catalyst to be regenerated, then the reaction product is fed into a separation system, and the spent catalyst to be regenerated is stripped, regenerated and recycled in the process. The isobutene content in the liquefied petroleum gas (LPG) produced by the process is increased by a factor of more than 30%, and the olefin content in the gasoline composition may be increased to more than 30 wt. %. The product distribution is optimized, and the yields of dry gas and coke are decreased, so as to sufficiently utilize the petroleum resources.Type: ApplicationFiled: September 23, 2011Publication date: August 15, 2013Applicant: CHINA PETROLEUM & CHEMICAL CORPORATIONInventors: Youhao Xu, Shouye Cui, Siwei Liu, Nan Jiang, Yinliang Liu