Patents by Inventor Zhiwei Liu

Zhiwei 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).

  • Publication number: 20180103045
    Abstract: It is described a network attack detection method. A topology analysis on network is conducted to obtain a probing path set containing at least one probing path. A first probing path contained in the probing path set is probed by using a probing pattern to obtain a performance metric of the first probing path. It is determined whether the first probing path is subjected to network attack according to the performance metric and a control performance metric.
    Type: Application
    Filed: December 8, 2017
    Publication date: April 12, 2018
    Inventors: Lei Xue, Zhiwei Liu, Xianneng Zou, Jingang Hou, Xiapu Luo, Edmond W. W. Chan, Pei Tu, Yuru Shao
  • Patent number: 9918061
    Abstract: System and method can support an image signal processing apparatus, such as a camera system. The image signal processing apparatus includes a processing device, such as a field programmable gate array (FPGA) device, which operates to receive one or more image data from an image sensor via an image data interface. The processing device can forward the received one or more image data to an image signal processor, wherein said image signal processor operates to compress the received one or more image data and save the compressed image data in a first storage medium. Furthermore, the processing device can export the received one or more image data to a second storage medium via a data communication interface.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: March 13, 2018
    Assignee: SZ DJI TECHNOLOGY CO., LTD.
    Inventors: Zhiwei Liu, Qiang Zhang, Junping Ma
  • Patent number: 9876807
    Abstract: It is described a network attack detection method. A topology analysis on network is conducted to obtain a probing path set containing at least one probing path. A first probing path contained in the probing path set is probed by using a probing pattern to obtain a performance metric of the first probing path. It is determined whether the first probing path is subjected to network attack according to the performance metric and a control performance metric.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: January 23, 2018
    Assignees: The Hong Kong Polytechnic University, Tencent Technology (Shenzhen) Company Limited
    Inventors: Lei Xue, Zhiwei Liu, Xianneng Zou, Jingang Hou, Xiapu Luo, Edmond W. W Chan, Pei Tu, Yuru Shao
  • Patent number: 9797714
    Abstract: A clearance detection system for a railway vehicle includes a cross beam, an upright column connected to two ends of the cross beam through an adjusting block, an inclined support connected to the upright column and the cross beam for supporting the upright column and the cross beam, an electric cylinder arranged on the upright column and the cross beam, a telescopic guide rod being provided on a guide rail of the electric cylinder, a connecting plate fixed at an end of the telescopic guide rod, and a PC connected to a controller of the electric-cylinder. The telescopic guide rod is movable along the guide rail of the electric-cylinder under movement of the electric-cylinder, adjusts the position of the industrial camera, and detects the contours of different types of rail vehicles.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: October 24, 2017
    Assignee: CRRC QINGDAO SIFANG CO., LTD.
    Inventors: Jingli Wei, Zhiwei Liu, Fangling Cheng, Xinfang Miao, Duling Sun, Feng Li, Zhe Wu, Mingjuan Ge, Song Zhang
  • Publication number: 20170067733
    Abstract: A clearance detection system for a railway vehicle includes a cross beam, an upright column connected to two ends of the cross beam through an adjusting block, an inclined support connected to the upright column and the cross beam for supporting the upright column and the cross beam, an electric cylinder arranged on the upright column and the cross beam, a telescopic guide rod being provided on a guide rail of the electric cylinder, a connecting plate fixed at an end of the telescopic guide rod, and a PC connected to a controller of the electric-cylinder. The telescopic guide rod is movable along the guide rail of the electric-cylinder under movement of the electric-cylinder, adjusts the position of the industrial camera, and detects the contours of different types of rail vehicles.
    Type: Application
    Filed: October 28, 2015
    Publication date: March 9, 2017
    Applicant: CRRC QINGDAO SIFANG CO., LTD.
    Inventors: Jingli WEI, Zhiwei LIU, Fangling CHENG, Xinfang MIAO, Duling SUN, Feng LI, Zhe WU, Mingjuan GE, Song ZHANG
  • Patent number: 9539905
    Abstract: The invention discloses a three-DOF hybrid damping pantograph, comprising an electric driving transmission system fixed on a base, and collector heads, transverse dampers, parallel support frames as well as longitudinal dampers. Square auxiliary holes are arranged on the base, supporting insulators are arranged on four angles below the base; four transverse dampers are symmetrically fixed on the base, and arranged on the outside of the parallel support frames and connected with the parallel support frames through hinges; four longitudinal dampers are symmetrically fixed on the top of the parallel support frames; the collector heads are connected with the parallel support frames by the longitudinal dampers and separators are arranged on the collector heads. The invention can realize bearing and damping spatially in three directions, avoid pantograph detachment, catenary scraping and other safety accidents, and improve the structural stability of the pantograph and adaptability to the catenary.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: January 10, 2017
    Assignees: Anhui University of Science and Technology
    Inventors: Chengjun Wang, Long Li, Xiaolong Zhu, Zhiwei Liu, Chao Zhang, Kai Liu, Tianyu Zhang
  • Publication number: 20160381338
    Abstract: System and method can support an image signal processing apparatus, such as a camera system. The image signal processing apparatus includes a processing device, such as a field programmable gate array (FPGA) device, which operates to receive one or more image data from an image sensor via an image data interface. The processing device can forward the received one or more image data to an image signal processor, wherein said image signal processor operates to compress the received one or more image data and save the compressed image data in a first storage medium. Furthermore, the processing device can export the received one or more image data to a second storage medium via a data communication interface.
    Type: Application
    Filed: September 12, 2016
    Publication date: December 29, 2016
    Applicant: SZ DJI TECHNOLOGY CO., LTD.
    Inventors: Zhiwei LIU, Qiang ZHANG, Junping MA
  • Publication number: 20160257205
    Abstract: The invention discloses a three-DOF hybrid damping pantograph, comprising an electric driving transmission system fixed on a base, and collector heads, transverse dampers, parallel support frames as well as longitudinal dampers. Square auxiliary holes are arranged on the base, supporting insulators are arranged on four angles below the base; four transverse dampers are symmetrically fixed on the base, and arranged on the outside of the parallel support frames and connected with the parallel support frames through hinges; four longitudinal dampers are symmetrically fixed on the top of the parallel support frames; the collector heads are connected with the parallel support frames by the longitudinal dampers and separators are arranged on the collector heads. The invention can realize bearing and damping spatially in three directions, avoid pantograph detachment, catenary scraping and other safety accidents, and improve the structural stability of the pantograph and adaptability to the catenary.
    Type: Application
    Filed: May 28, 2015
    Publication date: September 8, 2016
    Applicants: ANHUI UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Chengjun Wang, Long Li, Xiaolong Zhu, Zhiwei Liu, Chao Zhang, Kai Liu, Tianyu Zhang
  • Patent number: 9435021
    Abstract: A method for fabricating an OLED by preparing phosphorescent metal complexes in situ is provided. In particular, the method simultaneously synthesizes and deposits copper (I) complexes in an organic light emitting device. Devices comprising such complexes may provide improved photoluminescent and electroluminescent properties.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: September 6, 2016
    Assignee: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Mark E. Thompson, Zhiwei Liu, Chao Wu
  • Publication number: 20160119214
    Abstract: It is described an information processing method and device. It is received a request for service data from a client device. In response to the request for service data, it is sent at least two probing packets which contain the service data to the client device on a forward path which is from a server to the client device. It is obtained timing information, which includes: a time stamp corresponding to the service data, a time stamp corresponding to the request for the service data, and time stamps corresponding to at least two backward-path packets sent by the client device on a backward path, the backward path being from the client device to the server. It is determined according to the timing information a one-way path metric.
    Type: Application
    Filed: March 27, 2015
    Publication date: April 28, 2016
    Inventors: Xiapu Luo, Jingang Hou, Zhiwei Liu, Xianneng Zou, Juhong Wang, Lei Xue, Yajuan Tang, Weigang Wu
  • Publication number: 20160105453
    Abstract: It is described a network attack detection method. A topology analysis on network is conducted to obtain a probing path set containing at least one probing path. A first probing path contained in the probing path set is probed by using a probing pattern to obtain a performance metric of the first probing path. It is determined whether the first probing path is subjected to network attack according to the performance metric and a control performance metric.
    Type: Application
    Filed: April 16, 2015
    Publication date: April 14, 2016
    Inventors: Lei Xue, Zhiwei Liu, Xianneng Zou, Jingang Hou, Xiapu Luo, Edmond W. W Chan, Pei Tu, Yuru Shao
  • Patent number: 9293509
    Abstract: The present invention discloses a small-grain three-dimensional memory (3D-MSG). Each of its memory cells comprises a thin-film diode with critical dimension no larger than 40 nm. The thin-film diode comprises at least a small-grain material, whose grain size G is substantially smaller than the diode size D. The small-grain material is preferably a nano-crystalline material or an amorphous material. The critical dimension f of the small-grain diode is smaller than the critical dimension F of the single-crystalline transistor.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: March 22, 2016
    Assignees: HangZhou HaiCun Information Technology Co., Ltd.
    Inventors: Guobiao Zhang, Bin Yu, HongYu Yu, Jin He, JinFeng Kang, ZhiWei Liu
  • Patent number: 9222158
    Abstract: A process for producing particle-reinforced composite materials through utilization of an in situ reaction to produce a uniform dispersion of a fine particulate reinforcement phase. The process includes forming a melt of a first material, and then introducing particles of a second material into the melt and subjecting the melt to high-intensity acoustic vibration. A chemical reaction initiates between the first and second materials to produce reaction products in the melt. The reaction products comprise a solid particulate phase, and the high-intensity acoustic vibration fragments and/or separates the reaction products into solid particles that are dispersed in the melt and are smaller than the particles of the second material. Also encompassed are particle-reinforced composite materials produced by such a process.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: December 29, 2015
    Assignee: Purdue Research Foundation
    Inventors: Qingyou Han, Zhiwei Liu
  • Publication number: 20150364767
    Abstract: The disclosure discloses a porous electrode assembly, a flow half-cell and a flow cell stack. The porous electrode assembly includes multiple porous electrodes which are stacked, wherein at least two porous electrodes are flow passage electrodes with flow passage, and a part of flow passages of at least two flow passage electrodes are mutually communicated to form a flow field. The flow field used for circulating an electrolyte and formed by communicating the flow passages one another is arranged in at least one porous electrode of the porous electrode assembly, and the electrolyte flows in the porous electrodes under a flow guide effect of the flow field, so that surface areas, permeated by the electrolyte, of solid parts of the porous electrodes are enlarged, flow resistance of the porous electrodes to the flowing of the electrolyte is reduced, and a flow pressure difference is reduced.
    Type: Application
    Filed: January 31, 2013
    Publication date: December 17, 2015
    Applicant: DONGFANG ELECTRIC CORPORATION
    Inventors: Cong YIN, Hao TANG, Yanbin SONG, Zhiwei LIU, Yan GAO, Yangyue HU
  • Publication number: 20150214277
    Abstract: The present invention discloses a small-grain three-dimensional memory (3D-MSG). Each of its memory cells comprises a thin-film diode with critical dimension no larger than 40 nm. The thin-film diode comprises at least a small-grain material, whose grain size G is substantially smaller than the diode size D. The small-grain material is preferably a nano-crystalline material or an amorphous material. The critical dimension f of the small-grain diode is smaller than the critical dimension F of the single-crystalline transistor.
    Type: Application
    Filed: February 5, 2015
    Publication date: July 30, 2015
    Applicant: HangZhou HaiCun Information Technology Co., Ltd.
    Inventors: Guobiao ZHANG, Bin YU, HongYu YU, Jin HE, JinFeng KANG, ZhiWei LIU
  • Publication number: 20140331730
    Abstract: A rolling device for three-dimensional curved surface forming or thin sheet rolling of a sheet metal, comprising a forming roll (1), a supporting mechanism, an adjusting mechanism and a driving mechanism. The forming roll (1) comprises an upper forming roll (1a) and a lower forming roll (1b); the supporting mechanism is a multi-point supporting mechanism (2a) or an overall supporting mechanism (2b) for supporting the forming roll; the adjusting mechanism is a multi-point shape adjusting mechanism (3) and/or an overall displacing mechanism for adjusting the shape and/or relative height of the forming roll (1); and the driving mechanism applies a torque to one or two ends of the upper forming roll (1a) and/or the lower forming roll (1b). The present invention also provides a method for sheet rolling by using the rolling device. The rolling device and rolling method can achieve three-dimensional curved surface rolling or thin sheet rolling of a sheet metal simply, quickly and at a low cost.
    Type: Application
    Filed: November 15, 2012
    Publication date: November 13, 2014
    Applicant: JILIN UNIVERSITY
    Inventors: Mingzhe Li, Zhiwei Liu, Qigang Han, Zhongyi Cai, Renjun Li, Zhen Ssui, Wenzhi Fu, Chunguo Liu, Ningjia Qiu
  • Publication number: 20140219861
    Abstract: A process for producing particle-reinforced composite materials through utilization of an in situ reaction to produce a uniform dispersion of a fine particulate reinforcement phase. The process includes forming a melt of a first material, and then introducing particles of a second material into the melt and subjecting the melt to high-intensity acoustic vibration. A chemical reaction initiates between the first and second materials to produce reaction products in the melt. The reaction products comprise a solid particulate phase, and the high-intensity acoustic vibration fragments and/or separates the reaction products into solid particles that are dispersed in the melt and are smaller than the particles of the second material. Also encompassed are particle-reinforced composite materials produced by such a process.
    Type: Application
    Filed: November 20, 2013
    Publication date: August 7, 2014
    Applicant: Purdue Research Foundation
    Inventors: Qingyou Han, Zhiwei Liu
  • Patent number: 8613789
    Abstract: A process for producing particle-reinforced composite materials through utilization of an in situ reaction to produce a uniform dispersion of a fine particulate reinforcement phase. The process includes forming a melt of a first material, and then introducing particles of a second material into the melt and subjecting the melt to high-intensity acoustic vibration. A chemical reaction initiates between the first and second materials to produce reaction products in the melt. The reaction products comprise a solid particulate phase, and the high-intensity acoustic vibration fragments and/or separates the reaction products into solid particles that are dispersed in the melt and are smaller than the particles of the second material. Also encompassed are particle-reinforced composite materials produced by such a process.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: December 24, 2013
    Assignee: Purdue Research Foundation
    Inventors: Qingyou Han, Zhiwei Liu
  • Publication number: 20120115708
    Abstract: A process for producing particle-reinforced composite materials through utilization of an in situ reaction to produce a uniform dispersion of a fine particulate reinforcement phase. The process includes forming a melt of a first material, and then introducing particles of a second material into the melt and subjecting the melt to high-intensity acoustic vibration. A chemical reaction initiates between the first and second materials to produce reaction products in the melt. The reaction products comprise a solid particulate phase, and the high-intensity acoustic vibration fragments and/or separates the reaction products into solid particles that are dispersed in the melt and are smaller than the particles of the second material. Also encompassed are particle-reinforced composite materials produced by such a process.
    Type: Application
    Filed: November 10, 2011
    Publication date: May 10, 2012
    Applicant: PURDUE RESEARCH FOUNDATION
    Inventors: Qingyou Han, Zhiwei Liu
  • Publication number: 20120045862
    Abstract: A method for fabricating an OLED by preparing phosphorescent metal complexes in situ is provided. In particular, the method simultaneously synthesizes and deposits copper (I) complexes in an organic light emitting device. Devices comprising such complexes may provide improved photoluminescent and electroluminescent properties.
    Type: Application
    Filed: July 28, 2011
    Publication date: February 23, 2012
    Applicant: University of Southern California
    Inventors: Mark E. Thompson, Zhiwei Liu, Chao Wu