Patents Assigned to Peking University
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Patent number: 9018968Abstract: Proposed is a method for testing the density and location of a gate dielectric layer trap of a semiconductor device. The testing method tests the trap density and two-dimensional trap location in the gate dielectric layer of a semiconductor device with a small area (the effective channel area is less than 0.5 square microns) using the gate leakage current generated by a leakage path. The present invention is especially suitable for testing a device with an ultra-small area (the effective channel area is less than 0.05 square microns). The present method can obtain trap distribution scenarios of the gate dielectric layer in the case of different materials and different processes.Type: GrantFiled: February 28, 2012Date of Patent: April 28, 2015Assignee: Peking UniversityInventors: Ru Huang, Jibin Zou, Changze Liu, Runsheng Wang, Jiewen Fan, Yangyuan Wang
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Patent number: 9020266Abstract: A method for processing handwriting input includes determining a first boundary point and a second boundary point corresponding to each target track point, forming an enclosed area by connecting all first boundary points determined for all target track points, connecting all second boundary points determined for all the target track points, connecting the first boundary point corresponding to the first target track point with the second boundary point corresponding to the first target track point, and connecting the first boundary point corresponding to the last target track point with the second boundary points corresponding to the last target track point, and filling the enclosed area.Type: GrantFiled: December 31, 2012Date of Patent: April 28, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd.Inventors: Ying Wang, Lei Ma, Yingmin Tang
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Patent number: 9019541Abstract: The present invention provides a digital inkjet printing synchronous control device, which comprises: a storage unit, for storing data of various colored surfaces; a control unit, for controlling an interactive processing unit to perform data receiving, storage and sending as well as generation of a printing trigger signal; and the interactive processing unit, under the control of the control unit, for receiving from a front-end system of a digital inkjet printing apparatus the data of the colored surfaces, storing the received data into the storage unit, sending the stored data to a back-end system of the digital inkjet printing apparatus, generating, according to a signal from a peripheral encoder and/or color code sensor of the digital inkjet printing apparatus, printing trigger signals of the colored surfaces, and sending the printing trigger signals to the back-end system of the digital inkjet printing apparatus.Type: GrantFiled: December 31, 2012Date of Patent: April 28, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd.Inventors: Hong Shen, Lu Xue, Feng Chen
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Patent number: 9018049Abstract: A method for manufacturing an IGBT includes: forming oxide layers on the surfaces of the front and the back of an N-type substrate; forming a buffer layer in the surface of the back of the N-type substrate; forming protection layers on the surfaces of the oxide layers; removing the protection layer and the oxide layer overlying the front of the N-type substrate while reserving the oxide layer and the protection layer on the back of the N-type substrate for protection of the back of the N-type substrate; forming a front IGBT structure and applying a protection film on the surface of the front IGBT structure for protection of the front IGBT structure; removing the protection layer and the oxide layer overlying the back of the N-type substrate; forming a back IGBT structure and a back metal layer; and removing the protection film overlying the surface of the front IGBT structure.Type: GrantFiled: November 29, 2013Date of Patent: April 28, 2015Assignees: Peking University Founder Group Co., Ltd., Founder Microelectronics International Co., Ltd.Inventor: Guangran Pan
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Patent number: 9017454Abstract: A method for removing SOx (x=2 and/or 3) from gas using a solution having polyethylene glycol as the main ingredient. First, SOx in the gas is absorbed by the solution of polyethylene glycol. Second, the solution of polyethylene glycol which has absorbed SOx is regenerated by one or more of the heating, vacuum, ultrasonic, microwave or radiation methods, thereby releasing the by-products of sulfur dioxide and sulfur trioxide. The regenerated solution of polyethylene glycol is recycled. When the water content of the regenerated solution of polyethylene glycol is high enough to affect the desulfurization, it needs to be removed. Removal methods include heating and rectification, absorption using a water absorbent, or a combination of these methods. The polyethylene glycol solution is recycled after dehydration.Type: GrantFiled: February 10, 2010Date of Patent: April 28, 2015Assignees: Beijing Boyuan-Hengsheng High-Technology Co., Ltd., Yongfeng Boyuan Industry Co. Ltd., Peking UniversityInventors: Xionghui Wei, Fang Han, Jianbin Zhang, Pengyan Zhang, Daolong Gao, Jinfei Wang, Chuan Zou, Chun Hu
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Patent number: 9013734Abstract: The present invention provides a method and an apparatus for controlling pauses in printing. The method includes: transmitting imaging data to an imaging unit, and transmitting one printing signal while transmitting the imaging data of each page which are printed when the imaging unit receives the printing signal; generating a command of pausing printing when receiving a cause of pausing; stopping transmitting the printing signal to the imaging unit according to the command of pausing printing, printing the imaging data is stopped when the imaging unit cannot receive the printing signal.Type: GrantFiled: September 26, 2012Date of Patent: April 21, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd., Peking University Founder R&D CenterInventors: Dan Li, Xiaohui Wen, Zhihong Liu
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Patent number: 9007656Abstract: The present invention provides a method, an apparatus and a printing equipment for printing documents, comprising: obtaining the name of the color document; retrieving the printing step information for the color document, according to the name of the color document, and determining if the printing step information for the color document is complete; printing the color document, according to the printing step information, in the case that the printing step information for the color document is complete. Thus, it is possible to avoid the problem of consuming a large amount of time caused by processing the color document at each time of printing it, so as to greatly increase the speed and efficiency of cyclic printing documents.Type: GrantFiled: November 20, 2013Date of Patent: April 14, 2015Assignees: Peking University Founder Group Co., Ltd., Beijing Founder Electronics Co., Ltd.Inventors: Jinghua Shen, Haifeng Li, Yanman Ma
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Patent number: 8998359Abstract: Disclosed are a multicolor overprint control method and device applicable to an intermittent printing apparatus. According to the operating characteristic of the intermittent printing apparatus, the method solves the problems of overlap and inaccurate overprint of various colors during intermittent printing by controlling the relationship between the distance between adjacent color group modules of different colors and the motion distance between uniform segments of the intermittent printing apparatus. In addition, the method also sets different inkjet printing modes in accordance with whether the detected inkjet printing of the same color group module is in a first period, thereby solving the problems of printing media waste and discontinuous printing data. The method achieves multicolor digital inkjet printing by combining the unique motion mode of the printing media thereof, and makes printing contents flexible and changeable on the basis of guaranteeing printing efficiency.Type: GrantFiled: December 28, 2012Date of Patent: April 7, 2015Assignees: Peking University Founder Group Co., Ltd., Peking University, Beijing Founder Electronics Co., Ltd.Inventors: Zhengsheng Zhou, Hong Shen, Feng Chen, Zhihong Liu
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Publication number: 20150093021Abstract: Provided is a table recognizing method, comprising: parsing and analyzing metadata information in an original fixed-layout document, and extracting basic elements on a page of the document; segmenting the basic elements, extracting segmented text lines on the page, and acquiring fragments; constructing an undirected graph with respect to each of the fragments; extracting an image on the page, detecting intersection points of horizontal lines and vertical lines, detecting an external bounding box of the intersection points, and taking whether the segmented text lines fall within the external bounding box as local relationship features; training a learning model according to the local relationship features, local features of the fragments, and neighborhood relationship features among the fragments, acquiring model parameters, and establishing a table recognizing model; and invoking the table recognizing model to perform table recognizing for the document, and acquiring a recognizing result.Type: ApplicationFiled: December 4, 2013Publication date: April 2, 2015Applicants: Founder Apabi Technology Limited, Peking University Founder Group Co., Ltd.Inventors: Canhui XU, Zhi TANG, Jianbo XU, Xin TAO
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Publication number: 20150095022Abstract: A list recognizing method and system, which comprises: parsing and analyzing metadata information within an original fixed-layout document, and extracting basic elements within a page; segmenting the basic elements, extracting segmented text lines within the page to obtain fragments; building an undirected graph with respect to the fragments; detecting indent features of a bullet according to features of the basic elements; training a learning model according to the indent features, local features of the fragments and neighborhood relation features among the fragments, obtaining model parameters, and establishing a list recognizing model; and invoking the list recognizing model to perform list recognizing on the required document, so as to get recognition result.Type: ApplicationFiled: December 4, 2013Publication date: April 2, 2015Applicants: Founder Apabi Technology Limited, Peking University Founder Group Co., Ltd.Inventors: Canhui XU, Zhi TANG, Jianbo XU, Xin TAO
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Patent number: 8995531Abstract: Technologies are generally described herein for extracting a representative motion flow from a video. Technologies are also generally described herein for retrieving a video utilizing the representative motion flow. The representative motion flow may be extracted utilizing a sliding window approach to generate interesting motion flows. The representative motion flow may be generated based on the interesting motion flows.Type: GrantFiled: August 2, 2010Date of Patent: March 31, 2015Assignee: Peking UniversityInventors: Bin Cui, Zhe Zhao
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Patent number: 8995768Abstract: A method for processing data of a scanned book having a plurality of pages is disclosed. The method includes obtaining page image data from a page. The method further includes segmenting and recognizing the page image data to obtain locations of rectangular boxes corresponding to the respective characters and text codes for the respective characters. The method also includes obtaining respective aggregated character line information for each line of characters. The method further includes adjusting the rectangular boxes in accordance with the obtained aggregated character line information.Type: GrantFiled: December 28, 2012Date of Patent: March 31, 2015Assignees: Peking University Founder Group Co., Ltd., Beijing Founder Apabi Technology Ltd.Inventors: Ruiheng Qiu, Yun Li
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Patent number: 8995023Abstract: An amplitude modulation screening method is provided. The method comprises a step of utilizing regular hexagon screen dots to form a threshold matrix for amplitude screening. In embodiments of the present application, an amplitude modulation screening apparatus is also provided. The apparatus may comprise a matrix module configured to constitute a threshold matrix for amplitude screening using regular hexagon screen dots. Due to the threshold matrix formed with regular hexagon screen dots, the method and apparatus of the present application resolve the problem of the screen dots in the prior art, and improve the printing quality.Type: GrantFiled: December 23, 2011Date of Patent: March 31, 2015Assignees: Peking University Founder Group Co., Ltd, Peking University, Beijing Founder Electronics Co., Ltd., Peking University Founder R & D CenterInventors: Haifeng Li, Bin Yang
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Patent number: 8995165Abstract: The present invention discloses a resistive memory cell, including a unipolar type RRAM and a MOS transistor as a selection transistor serially connected to the unipolar type RRAM, wherein the MOS transistor is fabricated over a partial depletion SOI substrate and provides a large current for program and erase of the RRAM by using an intrinsic floating effect of the SOI substrate. The present invention utilizes a floating effect of a SOI device, in which under the same width/length ratio, a MOS transistor over a SOI substrate can provide larger source/drain current than a MOS transistor over a bulk silicon, so that the area occupied by the selection transistor is reduced, which is advantageous to the integration of the RRAM array.Type: GrantFiled: February 22, 2012Date of Patent: March 31, 2015Assignee: Peking UniversityInventors: Yimao Cai, Zhenni Wan, Ru Huang
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Patent number: 8991708Abstract: The embodiments of the present invention provide a method and a system for interaction between a paper media and a reader. A 2D barcode scanning means (1) scans an image of a 2D barcode in the paper media; a 2D barcode identification means (2) identifies a data structure of the image of the 2D barcode and displays items to be fed back by the reader on a terminal; an identification feedback means (3) transmits the feedback from the reader to a feedback response means (4); and the feedback response means (4), after receiving the feedback from the reader, displays the feedback and responds to it by the paper media. According to the embodiments of the present invention, it is able to relieve an increasing impact of a new media such as Internet, mobile Internet and tablet PC on the paper media, and to inspire the reader to interact with the paper media, thereby to provide convenient and efficient interaction and communication between the paper media and the reader and to enhance intimacy therebetween.Type: GrantFiled: November 21, 2013Date of Patent: March 31, 2015Assignees: Peking University Founder Group Co., Ltd., Beijing Founder Electronics Co., Ltd.Inventor: Yongqiang Wang
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Patent number: 8990219Abstract: Techniques, devices and systems for publishing digital contents such as encyclopedia are provided. One method for such digital publishing includes obtaining entries of encyclopedic resource files; indexing attributes of each of the entries by using preset indexing rules; reorganizing the entries based on the attributes; and publishing the reorganized entries by applying a preset template.Type: GrantFiled: December 21, 2012Date of Patent: March 24, 2015Assignees: Peking University Founder Group Co., Ltd., Beijing Founder Electronics Co., Ltd.Inventor: Jinlian Chen
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Publication number: 20150082043Abstract: The present application provides a terminal, a server and a digital content authorization method. The terminal comprises: an extracting unit, configured to extract identification information of the terminal when the terminal requests an authorization for a designated layer of content of digital contents from a server; a transceiver unit, configured to transmit the identification information of the terminal to the server and receive an authorization certificate and the designated layer of content of the digital contents from the server; and a decryption unit, configured to decrypt the designated layer of content of the digital contents based on the identification information and the authorization certificate. Embodiments of the present invention may support the copyright protection by using layered encryption technique. The digital content cannot be read only by copying so as to enhance the protection of the digital contents.Type: ApplicationFiled: December 3, 2013Publication date: March 19, 2015Applicants: Peking University Founder Group Co., Ltd., Founder Information Industry Group, Founder Apabi Technology LimitedInventors: Haitao WANG, Li DING, Yun LI, Jiayin CAO
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Publication number: 20150082027Abstract: The present invention provides a DRM method and system for supporting offline sharing of digital resources. When a client applies for joining in a domain, the client sends its own device information to a server, and obtains feature data of the domain by receiving a sharing certificate sent by the server. Wherein, the sharing certificate is created by encrypting the feature data of the domain by using the equipment information of the client as a cipher. The client decrypts the sharing certificate by using its own equipment information to obtain the feature data. Since the feature data has already been obtained in the procedure of applying for joining the domain, a client is able to use the digital resources by using the feature data even if the client cannot connect to network, thus, an advantage of supporting offline sharing of digital resources is achieved.Type: ApplicationFiled: December 3, 2013Publication date: March 19, 2015Applicants: Peking University Founder Group Co., Ltd., Founder Information Industry Group, Founder Apabi Technology LimitedInventors: Jingshan Ma, Li Ding
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Publication number: 20150081768Abstract: The present invention provides a server, a terminal and a data pushing method. The server comprises a request receiving unit configured to receive request information from at least one terminal and a pushing instruction from another server; a request generating unit configured to parsing the pushing instruction so as to obtain information of data associated with the terminal and generate a pushing request according to the information of the data associated with the terminal; and a request transmitting unit configured to transmit the pushing request to the terminal and transmit the request information to the other server, so that the other server determines the information of the data and generates the pushing instruction according to the request information.Type: ApplicationFiled: December 11, 2013Publication date: March 19, 2015Applicants: Peking University Founder Group Co., Ltd., Founder Information Industry Group, Founder Apabi Technology LimitedInventors: Xiang CHEN, Wei ZHENG
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Patent number: 8981421Abstract: The present invention discloses a strip-shaped gate-modulated tunneling field effect transistor and a preparation method thereof, belonging to a field of field effect transistor logic device and the circuit in CMOS ultra large scale integrated circuit (ULSI). The tunneling field effect transistor includes a control gate, a gate dielectric layer, a semiconductor substrate, a highly-doped source region and a highly-doped drain region, where the highly-doped source region and the highly-doped drain region lie on both sides of the control gate, respectively, the control gate has a strip-shaped structure with a gate length greater than a gate width, and at one side thereof is connected to the highly-doped drain region and at the other side thereof extends laterally into the highly-doped source region; a region located below the control gate is a channel region; and the gate width of the control gate is less than twice width of a source depletion layer.Type: GrantFiled: July 8, 2013Date of Patent: March 17, 2015Assignee: Peking UniversityInventors: Ru Huang, Qianqian Huang, Yingxin Qiu, Zhan Zhan, Yangyuan Wang