Patents by Inventor Zhixiong Wu

Zhixiong Wu 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).

  • Patent number: 11988454
    Abstract: A thermochemical energy storage system. The system includes a membrane-based thermochemical reactor having a solution channel having an absorbent-containing solution flowing therethrough and a refrigerant channel having a refrigerant flowing therethrough along with first and second fluid channels. A porous membrane is positioned between the refrigerant channel and the solution channel; the porous membrane permits flow of vapor molecules therethrough while restricting flow of absorbent molecules. The system further includes a solution storage repository in fluid communication with the solution channel and a refrigerant repository in fluid communication with the refrigerant channel. The system can be used in high-density, high-efficiency, and low-temperature energy storage systems. The membrane-based reactor offers a large specific surface area and integrates solution/refrigerant flows, which enables formation of a highly compact reactor exhibiting strong heat/mass transfer.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: May 21, 2024
    Assignee: City University of Hong Kong
    Inventors: Wei Wu, Zhixiong Ding, Yunren Sui, Chong Zhai, Zengguang Sui
  • Patent number: 9417100
    Abstract: A method of assisted mounting and error compensation for absolute grating ruler comprises: (1) when mounting a CMOS sensor and a grating ruler body, the CMOS sensor reads an upper and a lower sample windows, and due to an angle existing between the grating ruler body and the CMOS sensor, a difference exists between the numbers of the upper and lower sample windows, and by continually adjusting the grating ruler body or the CMOS sensor, the code reading difference minimized so that the angle is zeroed; (2) when mounting the grating ruler body and a mechanic housing, it is moved by a fixed displacement in a motion direction, and a grating encoding reading is recorded and an error compensating amount is obtained which serves as error compensation value in an actual motion to correct a cumulative error introduced by the angle between the grating ruler body and the motion direction.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: August 16, 2016
    Assignee: Guangdong University of Technology
    Inventors: Han Wang, Zhixiong Wu, Xin Chen, Xindu Chen, Bin Chen, Xiaohai Wei, Chaolong Fan
  • Publication number: 20160025522
    Abstract: The present invention is a method of assisted mounting and error compensation for absolute grating ruler. It comprises the following: (1) when mounting a CMOS sensor and a grating ruler body, the CMOS sensor reads an upper and a lower sample windows, and due to an angle existing between the grating ruler body and the CMOS sensor, a difference exists between the numbers of the upper and lower sample windows, and by continually adjusting the grating ruler body or the CMOS sensor, the code reading difference is made minimal so that the angle existing between the grating ruler body and the CMOS sensor is zeroed; (2) when mounting the grating ruler body and a mechanic housing, it is moved by a fixed displacement in a motion direction, and a grating encoding reading is recorded and an error compensating amount is obtained which serves as error compensation value in an actual motion to correct a cumulative error introduced by the angle between the grating ruler body and the motion direction.
    Type: Application
    Filed: January 28, 2015
    Publication date: January 28, 2016
    Applicant: Guangdong University of Technology
    Inventors: Han Wang, Zhixiong Wu, Xin Chen, Xindu Chen, Bin Chen, Xiaohai Wei, Chaolong Fan
  • Publication number: 20150379268
    Abstract: Particular embodiments described herein provide for an electronic device that can be configured to determine that a program related to a process begins to run, trace events related to the program when it is determined that the program should be monitored, and determine a number of events to be traced before the trace is concluded. The number of events to be traced can be related to the type of program. In addition, the number of events that are traced can be related to the activity of the program. A number of child events to be traced can be determined if the program has a child program. The traced child events can be combined with the events traced and the results can be analyzed to determining if the process includes malware.
    Type: Application
    Filed: June 27, 2014
    Publication date: December 31, 2015
    Inventors: Prabhat Singh, Zhixiong Wu
  • Patent number: 8341744
    Abstract: Behavioral blocking of overlay-type identity stealers is achieved by detecting a transactional web page session, evaluating a property of a window corresponding to a process running on the computer system, and then, based on a result of the evaluation, blocking a behavior of the process for a duration of the transactional web page session. The evaluation of the property window involves determining whether the window exhibits one or more characteristics representing activity of an overlay-type identity stealer.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: December 25, 2012
    Assignee: Symantec Corporation
    Inventors: Mark Obrecht, Zhixiong Wu
  • Patent number: 7027507
    Abstract: A coded moving-picture signal is decoded by a resolution-converting motion compensation process and a resolution-converting inverse discrete cosine transform, both of which decrease the resolution of the picture, thereby reducing the amount of reference picture data that has to be stored and accessed. The reference picture data may also be stored in a compressed form. The resolution conversion and compression processes may also be used in the coding of the moving-picture signal. The resolution-converting inverse discrete cosine transform may be performed by output of intermediate results that have not been combined by addition and subtraction in a butterfly computation.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: April 11, 2006
    Assignee: Oki Electric Industry Co., Ltd
    Inventor: Zhixiong Wu
  • Patent number: 6862319
    Abstract: A coded moving-picture signal is decoded by a resolution-converting motion compensation process and a resolution-converting inverse discrete cosine transform, both of which decrease the resolution of the picture, thereby reducing the amount of reference picture data that has to be stored and accessed. The reference picture data may also be stored in a compressed form. The resolution conversion and compression processes may also be used in the coding of the moving-picture signal. The resolution-converting inverse discrete cosine transform may be performed by output of intermediate results that have not been combined by addition and subtraction in a butterfly computation.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: March 1, 2005
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Publication number: 20030161404
    Abstract: A coded moving-picture signal is decoded by a resolution-converting motion compensation process and a resolution-converting inverse discrete cosine transform, both of which decrease the resolution of the picture, thereby reducing the amount of reference picture data that has to be stored and accessed. The reference picture data may also be stored in a compressed form. The resolution conversion and compression processes may also be used in the coding of the moving-picture signal. The resolution-converting inverse discrete cosine transform may be performed by output of intermediate results that have not been combined by addition and subtraction in a butterfly computation.
    Type: Application
    Filed: March 18, 2003
    Publication date: August 28, 2003
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Publication number: 20030156647
    Abstract: A coded moving-picture signal is decoded by a resolution-converting motion compensation process and a resolution-converting inverse discrete cosine transform, both of which decrease the resolution of the picture, thereby reducing the amount of reference picture data that has to be stored and accessed. The reference picture data may also be stored in a compressed form. The resolution conversion and compression processes may also be used in the coding of the moving-picture signal. The resolution-converting inverse discrete cosine transform may be performed by output of intermediate results that have not been combined by addition and subtraction in a butterfly computation.
    Type: Application
    Filed: March 18, 2003
    Publication date: August 21, 2003
    Applicant: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Patent number: 6584154
    Abstract: A coded moving-picture signal is decoded by a resolution-converting motion compensation process and a resolution-converting inverse discrete cosine transform, both of which decrease the resolution of the picture, thereby reducing the amount of reference picture data that has to be stored and accessed. The reference picture data may also be stored in a compressed form. The resolution conversion and compression processes may also be used in the coding of the moving-picture signal. The resolution-converting inverse discrete cosine transform may be performed by output of intermediate results that have not been combined by addition and subtraction in a butterfly computation.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: June 24, 2003
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Patent number: 6381370
    Abstract: A shape adaptive wavelet transform is performed on a digitized image signal representing an image. First, a shape information is obtained about the image, and the shape information is applied to a shape adaptive wavelet filter. The shape adaptive wavelet filter detects a starting point and an ending point of the image. The digitized image signal is divided into a low-frequency component and a high-frequency component. Then each frequency component is sampled, using the shape information. The shape adaptive wavelet filter then generates converted shape information indicating the shape for each sampled frequency component.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: April 30, 2002
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Patent number: 6236684
    Abstract: An N-level wavelet transform is executed on an image signal representing an image having a first dimension and a second dimension. First, an N-level one-dimensional wavelet transform is executed in the first dimension, thereby generating an intermediate signal which is temporarily stored in a memory device; then an N-level one-dimensional wavelet transform is executed on the intermediate signal in the second dimension. The image signal may be accompanied by shape information describing the shape of the image, in which case each N-level one-dimensional wavelet transform is executed by a series of N one-level wavelet transforms, with alteration of the shape information when each one-level wavelet transform is performed.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: May 22, 2001
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Patent number: 5953460
    Abstract: An image signal is transformed by at least two different mathematical transformations to obtain at least two different transformed signals. A selected one of the transformed signals is quantized and coded, the selection being made so as to minimize the size of the coded data. The selection is made by comparing the energy convergence rates of the transformed signals, or by quantizing all of the transformed signals and comparing the amounts of non-zero quantized data, or by quantizing and coding all of the transformed signals and comparing the coded data sizes directly.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: September 14, 1999
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Patent number: 5949912
    Abstract: A digitized image is divided into blocks and a wavelet transform is performed, producing wavelet blocks which are quantized, scanned into linear sequences, and then coded. The scanning of each wavelet block starts with a purely low-frequency element. The high-frequency elements are scanned in a sequence that depends on the occurrence of non-zero elements among the high-frequency elements. When a non-zero element is scanned, this information is used to proceed quickly to related high-frequency elements. This scanning method tends to produce a linear sequence in which non-zero elements are clustered together. Such sequences can be coded efficiently.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: September 7, 1999
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Zhixiong Wu
  • Patent number: 5506916
    Abstract: An image compression apparatus has a separation section for performing processing for dividing image data into a plurality of data blocks, an orthogonal transformer for orthogonal-transforming each data block, a bit allocation table for storing data representing the number of bits allocated in accordance with the frequency component of the orthogonal-transformed data output from the orthogonal transformer, an arithmetic operation circuit for calculating an amplitude probability density function of an identical frequency component of the orthogonal-transformed image data for each pixel, and calculating a quantization limit band causing a mean square error to be minimized in acordance with the calculating amplitude probability density function and the bit-number data from the bit allocation table, and a band limit table for storing the quantization limit band data.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: April 9, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Eitaro Nishihara, Zhixiong Wu, Yoshihiko Ogawa
  • Patent number: 4903317
    Abstract: An image processing apparatus includes a memory for storing image data, a loss-compression circuit for loss-compressing the image data, an expansion circuit for expanding the loss-compressed image data, and a difference circuit for calculating a difference between the original image data of the image memory and the expanded image data of the expansion circuit. A lossless compression circuit lossless-compresses the difference image data obtained by the difference circuit. A multiplexer multiplexes the loss-compressed image data output from the loss-compression circuit, with the lossless-compressed difference data obtained by the lossless-compression circuit.
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: February 20, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Eitaro Nishihara, Zhixiong Wu, Yoshihiko Ogawa