Patents Assigned to Peking University
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Patent number: 9142039Abstract: A method for improving a speed of rasterizing transparent images, comprising determining, from P graphic entity objects on a transparent page, M transparent images and N nontransparent images. Each of the N nontransparent images includes an intersecting area with one of the M transparent images, P is an integer larger than 0, M is an integer larger than 0 and smaller than or equal to P, N is an integer larger than or equal to 0 and smaller than P, and P=M+N. The method also comprises determining a page-level transparent area and a page-level de-transparentizing area of the P graphic entity objects. Contributions of the transparent images and the nontransparent images to the page-level transparent area and the page-level de-transparentizing area are calculated using different methods. The methods further comprises assembling the M transparent images according to the page-level transparent area and the page-level de-transparentizing area.Type: GrantFiled: December 31, 2012Date of Patent: September 22, 2015Assignees: Peking University Founder Group Co., Ltd., Beijing Founder Electronics Co., Ltd.Inventors: Zhangwei Meng, Hao Lin, Ken Chen
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Patent number: 9136178Abstract: Systems and methods of fabricating a FinFET in large scale integrated circuit are disclosed. One illustrative method relates to a dummy gate process, wherein the fin structure is only formed in the gate electrode region by performing a photolithography process and an etching of a first dummy gate on a flat STI surface using chemical mechanical polishing, forming drain and source regions, depositing a medium dielectric layer, polishing the medium dielectric layer till the top of the first dummy gate is exposed through the chemical mechanical polishing process again, removing the dummy gate material via a dry etching and a wet etching, and continuously etching the STI dielectric layer with the hard mask formed by the medium dielectric layer, thereafter performing the deposition of real gate dielectric and gate electrode material to complete the device structure.Type: GrantFiled: May 2, 2012Date of Patent: September 15, 2015Assignee: Peking UniversityInventors: Ming Li, Ru Huang
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Patent number: 9133195Abstract: Compounds represented by general formula (I), their stereoisomers, tautomers, derivatives, prodrugs or pharmaceutically acceptable salts, and their preparation methods or uses for the manufacture of a medicament of analgesics. In which R1 is selected from H, substituted or unsubstituted phenyl, or substituted or unsubstituted heteroaryl; A is bond, or saturated or unsaturated straight-chain or branched-chain hydrocarbon radical; R2, R3 are each independently hydrogen or methyl, which linked with any position of spirocyclo-structure; n and m are each independently integer between 0-2, do not represent 0 at the same time; B and D are each independently C1-C3 straight-chain or branched-chain alkylene; Y is selected from —CHR4—, O, S, —S(O)—, —SO2—, —NR4— and substituted or unsubstituted phenylene, in which R4 represents H, C1-C6 saturated or unsaturated alkyl, methyl or ethyl substituted by substituted or unsubstituted aryl or heteroaryl; and X? is pharmaceutical acceptable organic or inorganic anion.Type: GrantFiled: June 15, 2007Date of Patent: September 15, 2015Assignee: Peking UniversityInventors: Runtao Li, Qi Sun, Jia Ye, Caiqin Yue, Xin Wang, Zemei Ge, Changling Li, Tieming Cheng
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Patent number: 9123982Abstract: A directional coupler is disclosed integrated on a single chip and an integrated circuit based on a standard CMOS process and relates to a field of radio frequency communication. In exemplary implementations, by using a standard CMOS process technology, the directional coupler integrated by a CMOS process is formed by a coil wound by a upper layer of metal lines, a coil wound by a lower layer of metal lines, two tuning capacitor array, and a matching resistor. Two terminals of the coil are a direct terminal and an input terminal; two terminals of the coil are a coupled terminal and an isolation terminal; the terminals of the coils and are intersected at 90°; the coil is wound by an upper metal layer and the coil is wound by a lower metal layer. Further, the insertion loss is low and the isolation degree is large.Type: GrantFiled: April 16, 2012Date of Patent: September 1, 2015Assignee: Peking UniversityInventors: Le Ye, Jiayi Wang, Huailin Liao, Ru Huang
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Patent number: 9111367Abstract: The present invention relates to the field of digital image enhancement technologies, and more particularly to a non-locality-based super-resolution reconstruction method and device, so as to solve the problem of relatively low resolution of an image after non-locality-based super-resolution reconstruction in the prior art.Type: GrantFiled: December 13, 2012Date of Patent: August 18, 2015Assignees: Peking University, Peking University Founder Group Co., Ltd., Beijing Founder Electronics Co., Ltd.Inventors: Jiaying Liu, Yue Zhou, Jie Ren, Zongming Guo
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Patent number: 9111614Abstract: A resistive switching memory device and a method for operating the same are disclosed. The device includes a plurality of resistive switching memory units arranged in a matrix, each of which includes a switching element and a resistive switching device, and the switching element being connected to a word line at its control terminal, to the resistive switching device at one terminal, and to a bit line at the other terminal; a word line decoder adapted to decode an input address signal to switch on the switching element in at least one of resistive switching memory units; and a driving circuit adapted to apply a voltage pulse whose front edge changes slowly across the resistive switching device by the bit line synchronously with the switching-on of the switching element.Type: GrantFiled: December 21, 2012Date of Patent: August 18, 2015Assignee: Peking UniversityInventors: Jinfeng Kang, Bing Chen, Bin Gao, Feifei Zhang, Lifeng Liu, Xiaoyan Liu
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Patent number: 9111341Abstract: The application provides a method for partitioning a watermark image with western language characters, comprising: partitioning a western language characters image along rows and columns to form a plurality of character image blocks; identifying valid character image blocks from the formed character image blocks; counting sizes of the valid character image blocks to determine if the image corresponds to a document with a large font size or a document with a small font size; dividing words in the image into a plurality of groups, wherein each divided group in the document with large font size has different numbers of words from that with small font size; and dividing equally the divided word groups into multiple portions corresponding to watermark image blocks. The application further provides a device for partitioning a watermark image with western language characters. The operability of watermark embedding process can be ensured through the above technical solution.Type: GrantFiled: December 23, 2011Date of Patent: August 18, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd., Peking Universit Founder R & D CenterInventors: Gaoyang Wang, Wenfa Qi, Lidong Wang, Bin Yang
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Patent number: 9109003Abstract: The present invention provides an extraction method for the leaves of Ilex kudingcha C. J. Tseng, and the total saponins from I. kudingcha leaves extracted by using this method, and use of the total saponins in preparing a drug for reducing cholesterol and blood lipids and anti-atherosclerosis. The extraction method comprises the following steps: subjecting I. kudingcha leaves to refluxing extraction with ethanol aqueous solution to obtain an extracted solution; filtering the extracted solution and removing ethanol, and then separating and purifying the solution using a macroporous resin column.Type: GrantFiled: December 21, 2011Date of Patent: August 18, 2015Assignee: Peking UniversityInventors: Pengfei Tu, Tongmei Zhang, Jiao Zheng, Yong Jiang, Haiyan Zhou, Li Tang, Zhizhong Ma
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Patent number: 9101084Abstract: A method of fabricating a printed circuit board is disclosed. The method includes opening a first window in a first base board and opening a second window in a second base board and a resin layer. The resin layer is between the second base board and the first base board. The method further includes bonding the first base board and the second base board through the resin layer; placing a heat dissipating conductor in the first window in the first base board through the second window; placing a resin portion on the first base board in the second window; embedding a sub-board in the second window of the second base board; and bonding the sub-board with the first base board through the resin portion.Type: GrantFiled: December 31, 2012Date of Patent: August 4, 2015Assignees: Peking University Founder Group Co., Ltd., Zhuhai Founder Tech. Multilayer PCB Co., Ltd., Zhuhai Founder PCB Development Co., Ltd.Inventor: Yansheng Hua
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Patent number: 9099500Abstract: The present invention discloses a hexagonal programmable array based on a silicon nanowire field effect transistor and a method for fabricating the same. The array includes a nanowire device, a nanowire device connection region and a gate connection region, wherein, the nanowire device has a cylinder shape, and includes a silicon nanowire channel, a gate dielectric layer, and a gate region, the nanowire channel being surrounded by the gate dielectric layer, and the gate dielectric layer being surrounded by the gate region; the nanowire devices are arranged in a hexagon shape to form programming unit, the nanowire device connection region is a connection node of three nanowire devices and secured to a silicon supporter. The present invention can achieve a complex control logic of interconnections and is suitable for a digital/analog and a mixed-signal circuit having a high integration degree and a high speed.Type: GrantFiled: November 18, 2011Date of Patent: August 4, 2015Assignee: Peking UniversityInventors: Ru Huang, Jibin Zou, Runsheng Wang, Jiewen Fan, Changze Liu, Yangyuan Wang
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Patent number: 9090471Abstract: This application provides a novel method for producing a tetracalcium phosphate-based fluorapatite. Also provided is a method of using the fluorapatite for repairing enamel defects.Type: GrantFiled: September 2, 2010Date of Patent: July 28, 2015Assignee: Peking UniversityInventors: Shicheng Wei, Jie Wei, Xiaochen Liu, Chengjie Wang, Yifei Zhang
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Patent number: 9086448Abstract: A method for predicting a reliable lifetime of a SOI MOSFET device including: measuring a relationship of a gate resistance of the device varying as a function of a temperature at different wafer temperatures; performing a lifetime accelerating test on the device at different wafer temperatures, so as to obtain a degenerating relationship of a parameter representing the lifetime of the device as a function of stress time, and obtain a lifetime in the presence of self-heating when the parameter degenerates to 10%; performing a self-heating correction on the measured lifetime of the device by using the measured self-heating temperature and an Arrhenius model, so as to obtain a lifetime without self-heating influence; performing a self-heating correction on a variation of the drain current caused by self-heating; performing a self-heating correction on an impact ionization rate caused by hot carriers; and predicting the lifetime of the device under a bias.Type: GrantFiled: November 30, 2011Date of Patent: July 21, 2015Assignee: Peking UniversityInventors: Ru Huang, Dong Yang, Xia An, Xing Zhang
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Method and system for controlling multicolor ink-jet printing on intermittent rotary printing device
Patent number: 9073339Abstract: Disclosed is a control method for a digital ink-jet printing device to carry out multicolor ink-jet printing on an intermittent rotary printing device. The method includes: determining whether a current page is the first page; if yes, calculating a length of an image to be printed on the current page by subtracting a distance between an imaging component group and a reference from a length of a page, wherein the reference is the foremost printing imaging component group in a movement direction of a printed body, and acquiring image data of the current page, the length of which is the calculated length, after delaying the distance; if no, acquiring unprinted image data of a previous page, the length of which is the distance, and image data of the current page, the length of which is the calculated length.Type: GrantFiled: December 30, 2011Date of Patent: July 7, 2015Assignees: Peking University Founder Group, Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd., Peking University Founder R&D CenterInventors: Jianmei Huang, Tao Yang, Feng Chen -
Patent number: 9073316Abstract: This invention provides an inkjet printing positioning device and control method thereof. The inkjet printing positioning device comprises: base; linear guide rail fixedly mounted on the base; inkjet unit, moving in matched manner with the linear guide rail; ball screw, driving the inkjet unit to move linearly when being rotated; servomotor, for driving the ball screw to rotate; zero position detecting device, mounted in a position on the moving travel route of the inkjet unit from the initial position to the printing area, and for sending zero position signal when detects that the inkjet unit is passing by; controller connecting the zero position detecting device and the servomotor, and for controlling the servomotor to drive the inkjet unit to move from the current position to the printing area and locate there, and controlling the servomotor to drive the inkjet unit to move predetermined displacement upon receipt of zero position signal.Type: GrantFiled: August 7, 2012Date of Patent: July 7, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd., Peking University Founder R&D CenterInventors: Peng Jin, Feng Chen, Zhihong Liu
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Patent number: 9069775Abstract: A method and a device for directory generation are provided in the present disclosure. The method comprises searching a directory byte stream in a text file. The directory byte stream includes a predetermined directory key byte corresponding to a predetermined directory character. The method also comprises generating a directory of the text file based on the directory byte stream.Type: GrantFiled: December 31, 2012Date of Patent: June 30, 2015Assignees: Peking University Founder Group Co., Ltd., Beijing Founder Apabi Technology Ltd.Inventor: Chunyu Li
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Patent number: 9047937Abstract: A resistive random access memory device, a method for manufacturing the resistive random access memory device, and a method for operating the resistive random access memory device are disclosed. The resistive random access memory device includes a resistive switching memory element including two electrodes and a layer of variable-resistance material between the two electrodes, wherein the layer of variable-resistance material exhibits bipolar resistive switching behavior; and a Schottky diode including a metal layer and a p-doped semiconductor layer which contact each other, wherein the metal layer of the Schottky diode is coupled to one of the two electrodes of the resistive switching memory element. The present disclosure provides the resistive random access memory device operating in bipolar resistive switching scheme.Type: GrantFiled: May 19, 2011Date of Patent: June 2, 2015Assignee: Peking UniversityInventors: Jinfeng Kang, Bin Gao, Yuansha Chen, Bing Sun, Lifeng Liu, Xiaoyan Liu
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Patent number: 9034702Abstract: Disclosed herein is a method for fabricating a silicon nanowire field effect transistor based on a wet etching.Type: GrantFiled: November 18, 2011Date of Patent: May 19, 2015Assignee: Peking UniversityInventors: Ru Huang, Jiewen Fan, Yujie Ai, Shuai Sun, Runsheng Wang, Jibin Zou, Xin Huang
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Publication number: 20150131728Abstract: A motion vector estimation method in video encoding: First, a feature point is detected in a video frame. Next, motion estimation is performed on the feature point to obtain a motion vector of the feature point. Next, the feature point is mapped to a feature image block, and the motion vector of the feature point is used as an initial motion vector of the feature image block. Finally, a distance between each image block and the feature image block is calculated, motion estimation is performed on the image blocks in an ascending order of the distances between the image blocks and the feature image block, and an obtained motion vector of an image block is used as an initial motion vector of an image block that is adjacent to the image block and has not undergone motion estimation, until motion estimation is completed for the image blocks in the entire video frame.Type: ApplicationFiled: June 25, 2013Publication date: May 14, 2015Applicant: Peking University Shenzhen Graduate SchoolInventors: Ronggang Wang, Chengzhou Tang, Wen Gao
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Publication number: 20150127644Abstract: The present application discloses methods and systems for incrementally collecting replies in a forum and belongs to the technical field of collecting network information. The method comprises periodically determining whether there is a newly-established post and a post having new replies in all forum list pages needed to be collected: if yes, extracting a main post and reply information from the newly-established post, and extracting the information of the new replies from the post having new replies. The system comprises a determining device (11) for periodically determining whether there is a newly-established post and a post having new replies in all forum list pages needed to be collected; and an extracting device (12) for extracting a main post and reply information from the newly-established post, and extracting the information of the new replies from the post having new replies.Type: ApplicationFiled: December 22, 2011Publication date: May 7, 2015Applicants: Peking University Founder Group Co., Ltd., Peking University Founder R & D Center, Beijing Founder Electronics Co., Ltd., Peking UniversityInventors: Xinli Wu, Jianwu Yang
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Patent number: 9025203Abstract: A method for generating print parameters includes: obtaining a printed paper of a test sample sheet obtained by a printing device after performing double-sided printing on the test sample sheet using preset front print parameters and preset back print parameters; detecting a front effect index of a front print effect and a back effect index of a back print effect for the printed paper of the test sample sheet by a print parameter generating device; comparing the front effect index and the back effect index with a standard effect index to obtain a comparison result, or comparing the front effect index with the back effect index to obtain a comparison result; determining from the comparison result and store in the printing device front print parameters and back print parameters used for double-sided printing on a paper to be printed with the same material and attributes as the test sample sheet.Type: GrantFiled: December 4, 2013Date of Patent: May 5, 2015Assignees: Peking University Founder Group Co., Ltd., Founder Information Industry Holdings Co., Ltd., Beijing Founder Electronics Co., Ltd.Inventor: Guoxin Jiang