Patents by Inventor Zhi Tang
Zhi Tang 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: 20140351320Abstract: Embodiments of the invention disclose a method, system and apparatus for coordinated processing of a document, relate to the field of data processing and are intended to address the problem of how multiple clients perform coordinated operations on the document. In the invention, a server detects a document operation on a first client among respective clients at a preset frequency and sends a detection result to a second client other than the first client; and the second client displays the detection result. Apparently this solution addresses the problem of how the multiple clients perform coordinated operations on the document.Type: ApplicationFiled: November 27, 2013Publication date: November 27, 2014Applicants: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Apabi Technology Ltd.Inventors: Fei GAO, Li LIU, Xiaoyu CUI, Zhi TANG
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Publication number: 20140348390Abstract: The present invention provides a method and an apparatus for detecting a traffic monitoring video. The method comprises: determining a background reference model; determining a target area image in the traffic monitoring video according to the background reference model; updating the background reference model by using the target area image; summating all target points in detection area of each frame of image in the traffic monitoring video according to the updated background reference model to obtain a total area of all the target points; segmenting the frame with the biggest total area to obtain a target area at the best position; and extracting vehicle information from the target area at the best position. By using the present invention, the accuracy of a detection result in a complex environment may be improved.Type: ApplicationFiled: November 27, 2013Publication date: November 27, 2014Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., PEKING UNIVERSITY, BEIJING FOUNDER APABI TECHNOLOGY LTD.Inventors: Yan LIU, Xiaoqing LV, Jianbo XU, Zhi TANG
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Publication number: 20140334727Abstract: A method and apparatus for describing an image are disclosed. The method for describing an image according to an embodiment of the invention includes: transforming an image from a BGR color space into a Gaussian derivative color model; and transforming the image from the Gaussian derivative color model into an optical reflection invariant color space, wherein the process of transforming the image from the Gaussian derivative color model into the optical reflection invariant color space includes: determining, for each pixel on the image, color channels of the pixel corresponding to the optical reflection invariant color space according to a first coefficient and a second coefficient of the pixel in the Gaussian derivative color model. The embodiments of the invention can alleviate an error in a description of an image of the same contents but with a significant change in color.Type: ApplicationFiled: November 27, 2013Publication date: November 13, 2014Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., PEKING UNIVERSITY, BEIJING FOUNDER APABI TECHNOLOGY LTD.Inventors: Yan LIU, Xiaoqing LV, Jianbo XU, Zhi TANG, Xiaoyu CUI
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Publication number: 20140337719Abstract: The present invention provides an apparatus for logically processing a composite graph in a formatted document, the apparatus comprising: a composite graph block extraction unit, used to extract a composite graph block in the formatted document; a document parsing unit, used to parse the formatted document to obtain a text element contained therein; a cutline element extraction unit, used to extract a cutline element from the text element; a correlativity detection unit, used to detect correlativity between the composite graph block and the cutline element; a correlativity storage unit, used to store the detected correlativity. The present invention also provides a method for logically processing a composite graph in a formatted document. According to the technical scheme disclosed in the present invention, it is easily achieve layout understanding of the composite graph in a graph-text mixed layout of the formatted document, so as to avoid a logical error.Type: ApplicationFiled: December 3, 2013Publication date: November 13, 2014Applicants: Peking University Founder Group Co., Ltd., Peking University, Founder Apabi Technology LimitedInventors: Canhui Xu, Zhi Tang, Xin Tao, Cao Shi
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LOGIC PROCESSING APPARATUS AND LOGIC PROCESSING METHOD FOR COMPOSITE GRAPHS IN FIXED LAYOUT DOCUMENT
Publication number: 20140337717Abstract: A logic process apparatus for composite graphs in a fixed layout document is provided in this invention, comprising: a composite graph block extraction unit, for extracting composite graph blocks from the fixed layout document; a document parsing unit, for parsing the fixed layout document to obtain text primitives contained therein; a legend primitive extraction unit, for extracting legend primitives from the text primitives; a correlation detection unit, for detecting correlations between the composite graph blocks and the legend primitives; a correlation storage unit, for storing the detected correlations. A logic process method for composite graphs in a fixed layout document is also provided.Type: ApplicationFiled: December 12, 2013Publication date: November 13, 2014Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., PEKING UNIVERSITY, FOUNDER APABI TECHNOLOGY LIMITEDInventors: Canhui XU, Zhi TANG, Xin TAO, Cao SHI -
Patent number: 8887299Abstract: A digital content rights management method and system belongs to the digital content rights management technique field. The method of the invention includes the steps: registering the system, generating the time stamp, verifying the time stamp when the system starts up, acquiring the certificate, verifying the time before accessing the digital content. The system of the invention comprises a device for accessing the digital content and a server, wherein the device for accessing the digital content comprises: a registering module, a time stamp generating module, a time stamp verification module, a certificate of authorization acquiring module, and a time verification module. The method and system have solved the problem that the digital content can still be used beyond the time limit.Type: GrantFiled: December 11, 2007Date of Patent: November 11, 2014Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Apabi Technology Ltd.Inventors: Yi Wang, Zhi Tang, Dengsha Yuan, Xuefeng Yang
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Publication number: 20140250535Abstract: An apparatus for preventing replay attacks and a method for preventing replay attacks are provided in this invention, wherein the apparatus for preventing replay attacks comprises: an acquisition unit for, when a request for operating a digital content is received, acquiring current location information of a set of placeholder files; a determination unit for determining whether the current location information is consistent with recorded location information of the placeholder file; a protection unit for, when inconsistent as determined by the determination unit, wherein there is a correspondence between the digital content and the set of placeholder files.Type: ApplicationFiled: December 11, 2013Publication date: September 4, 2014Applicants: PEKING UNIVERSITY, FOUNDER APABI TECHNOLOGY LIMITED, PEKING UNIVERSITY FOUNDER GROUP CO., LTD.Inventors: Cheng QU, Yinyan Yu, Zhi Tang
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Publication number: 20140219501Abstract: The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.Type: ApplicationFiled: January 23, 2014Publication date: August 7, 2014Inventors: Li Zhang, Qingping Huang, Yunda Sun, Lei Lei, Zhi Tang
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Publication number: 20140175818Abstract: A pick up mechanism includes a pick up rod, a pick up head, and a resisting assembly. The pick up head is assembled to an end of the pick up rod. The resisting assembly includes a guiding seat, a resisting member, a pair of guiding rods, and a pair of elastic members. The guiding seat is fixedly sleeved on the pick up rod, the resisting member slidably shields the pick up head. The pair of guiding rods is fixed on the guiding seat, and blocks the resisting member. The pair of elastic members is resisted between the guiding seat and the resisting member, wherein the pick up head is exposed or shielded by moving the resisting member relative to the pick up rod.Type: ApplicationFiled: December 13, 2013Publication date: June 26, 2014Applicants: HON HAI PRECISION INDUSTRY CO., LTD., Fu Tai Hua Industry (Shenzhen) Co., Ltd.Inventors: CHENG-HUAN LEI, YONG-FENG WANG, YUN ZHAO, ZHI-TANG DAI, DONG LI, SHA SHEN
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Publication number: 20140097059Abstract: A lubricant composition comprising lubricating oil and a compound containing phosphorus and an amine of formula I: wherein R1 is a hydrocarbon group and at least one of R1 is selected from: —(C1-C20)alkyl, —(C1-C20)alkenyl, —(C5-C20)cycloalkyl; R is selected from: —(C4-C20)alkyl, —(C4-C20)alkenyl, —(C5-C20)cycloalkyl; and wherein R2, R3 and R4 are independently selected from: —H, —(C6-C36)alkyl, —(C6-C36)alkenyl, —(C6-C36)cycloalkyl, wherein at least one of R2, R3 and R4 is not H; X is O or S; Y1 and Y2 are selected from S and O; m is 1 or 2, n is 0 or 1, p is 1 or 2, provided that m+n+p=3 and q=0.8 to 1.2*p, wherein the compound provides at least 48 ppm of phosphorus and a molar ratio phosphorus to nitrogen (P/N) in the range of about 0.40 to about 1.50.Type: ApplicationFiled: December 10, 2013Publication date: April 10, 2014Applicant: Afton Chemical CorporationInventors: Hong-Zhi TANG, Lee D. SAATHOFF
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Patent number: 8433266Abstract: A power supply apparatus for a radio frequency power amplifier (RFPA) is provided, where the output end of a voltage controlled voltage source (VCVS) and the output ends of N current controlled current sources (CCCSs) are coupled in parallel to supply power to the RFPA. The apparatus further includes an nth sampling unit, configured to sample the sum of the output currents of the first (n?1) CCCSs and the VCVS to obtain an nth sampling signal; and an nth filtering unit, configured to filter the nth sampling signal according to a predefined nth passband and output the filtered nth sampling signal to an nth CCCS, thus controlling the output current of the nth CCCS. The nth passband is lower than an (n?1)th passband. The switching frequency of the nth CCCS is higher than the switching frequency of an (n?1)th CCCS. N is an integer greater than or equal to 2, and n is a positive integer smaller than or equal to N.Type: GrantFiled: September 30, 2010Date of Patent: April 30, 2013Assignee: Huawei Technologies Co., Ltd.Inventors: Zhi Tang, Zhaozheng Hou
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Patent number: 8400030Abstract: A dispersant additive composition, a lubricant composition containing the dispersant additive, a transmission containing the dispersant additive, and a method of providing a versatile lubricating fluid. The dispersant includes a reaction product of a hydrocarbyl substituted carboxylic acid or anhydride and an amine. The reaction product has a nitrogen content up to 10,000 ppm by weight, and a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0:1 to about 0.8:1. The dispersant additive composition is effective to provide an electrical conductivity to a lubricant composition containing the dispersant additive composition and a metal detergent of less than about 1700 pS/m.Type: GrantFiled: June 11, 2012Date of Patent: March 19, 2013Assignee: Afton Chemical CorporationInventors: Hong-Zhi Tang, Mark T. Devlin, Naresh Mathur, Lee D. Saathoff, Timothy J. Henly
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Publication number: 20110087959Abstract: Disclosed are a method and a device for processing the structure of a layout file, comprising: obtaining document content structure information and/or document layout exhibition information of the layout file; dividing document contents of the layout file into content blocks according to the document content structure information and/or the document layout exhibition information; and creating document flow information of the layout file according to the divided content blocks.Type: ApplicationFiled: June 6, 2009Publication date: April 14, 2011Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., BEIJING FOUNDER APABI TECHNOLOGY LIMITED, PEKING UNIVERSITYInventors: Ruiheng Qiu, Yi Wang, Zhi Tang
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Publication number: 20110074467Abstract: A power supply apparatus for a radio frequency power amplifier (RFPA) is provided, where the output end of a voltage controlled voltage source (VCVS) and the output ends of N current controlled current sources (CCCSs) are coupled in parallel to supply power to the RFPA. The apparatus further includes an nth sampling unit, configured to sample the sum of the output currents of the first (n?1) CCCSs and the VCVS to obtain an nth sampling signal; and an nth filtering unit, configured to filter the nth sampling signal according to a predefined nth passband and output the filtered nth sampling signal to an nth CCCS, thus controlling the output current of the nth CCCS. The nth passband is higher than an (n?1)th passband. The switching frequency of the nth CCCS is higher than the switching frequency of an (n?1)th CCCS. N is an integer greater than or equal to 2, and n is a positive integer smaller than or equal to N.Type: ApplicationFiled: September 30, 2010Publication date: March 31, 2011Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventor: Zhi Tang
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Patent number: 7790912Abstract: A polycarbodiimide polymer that is reversibly switchable between two distinct optical orientations is described. The polymer is useful in forming devices such as filters, storage media, actuators, and displays. Methods of making and using such polymers are also described.Type: GrantFiled: December 30, 2008Date of Patent: September 7, 2010Assignee: North Carolina State UniversityInventors: Bruce M. Novak, Hong-Zhi Tang
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Publication number: 20100218239Abstract: A digital content counting system and a method thereof are provided for achieving the credible transaction counting mechanism established between the owner of copyrights and the seller, to make the owner of copyrights and the seller collectively confirm the transaction information of the digital contents.Type: ApplicationFiled: May 16, 2008Publication date: August 26, 2010Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., PEKING UNIVERSITY, BEIJING FOUNDER APABI TECHNOLOGY LTD.Inventors: Zhi Tang, Xiaojun Huang
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Publication number: 20100086130Abstract: A digital content rights management method and system belongs to the digital content rights management technique field. The method of the invention includes the steps: registering the system, generating the time stamp, verifying the time stamp when the system starts up, acquiring the certificate, verifying the time before accessing the digital content. The system of the invention comprises a device for accessing the digital content and a server, wherein the device for accessing the digital content comprises: a registering module, a time stamp generating module, a time stamp verification module, a certificate of authorization acquiring module, and a time verification module. The method and system have solved the problem that the digital content can still be used beyond the time limit.Type: ApplicationFiled: December 11, 2007Publication date: April 8, 2010Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., PEKING UNIVERSITY, BEIJING FOUNDER APABI TECHNOLOGY LTD.Inventors: Yi Wang, Zhi Tang, Dengsha Yuan, Xuefeng Yang
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Publication number: 20090148673Abstract: A polycarbodiimide polymer that is reversibly switchable between two distinct optical orientations is described. The polymer is useful in forming devices such as filters, storage media, actuators, and displays. Methods of making and using such polymers are also described.Type: ApplicationFiled: December 30, 2008Publication date: June 11, 2009Applicant: North Carolina State UniversityInventors: Bruce M. Novak, Hong-Zhi Tang
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Publication number: 20090092690Abstract: This invention provides various products and processes such as a process of making a theaflavins enriched extract of tea having a low content of high molecular weight thearubigins which comprises extracting theaflavins from tea using ethanol to produce an extract having a high theaflavins content and a low content of high molecular weight thearubigins.Type: ApplicationFiled: July 24, 2008Publication date: April 9, 2009Inventors: Hsiu Wei Yang, Shiming Li, Bu-xiang Sun, Ling-zhi Tang, Bo-feng Wu, Zhi-hui Wang, Zhen-peng Chen
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Patent number: 7485740Abstract: A polycarbodiimide polymer that is reversibly switchable between two distinct optical orientations is described. The polymer is useful in forming devices such as filters, storage media, actuators, and displays. Methods of making and using such polymers are also described.Type: GrantFiled: January 26, 2006Date of Patent: February 3, 2009Assignee: North Carolina State UniversityInventors: Bruce M. Novak, Hong-Zhi Tang