Patents by Inventor Xiaofeng Zhang

Xiaofeng Zhang 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: 20130054764
    Abstract: A registration method includes acquiring, by a second CIMOM, parameters of a CIM provider from a first CIMOM by using information of a namespace to which a device to be configured belongs or device information of the device to be configured. The second CIMOM obtains identification information of the CIM provider in the parameters of the CIM provider through matching according to the device information or model information of the device to be configured. The second CIMOM acquires the CIM provider from the first CIMOM by using the obtained identification information of the CIM provider, and registering the CIM provider.
    Type: Application
    Filed: August 2, 2012
    Publication date: February 28, 2013
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Chao Zhang, Yong Chao, Xiaofeng Zhang
  • Publication number: 20130046910
    Abstract: A method for managing a processor includes: obtaining an online request of a processor of a computer system; collecting lock contention information of the computer system if a lock contention status flag indicates a non-lock thrashing status; determining whether the computer system is in a lock thrashing status according to the lock contention information; and accepting the online request if it is determined that the computer system is in a non-lock thrashing status. By using the management method according to embodiments of the present application, processor performance degradation and a waste of idle processor resources that are caused by the case that the computer system is in a lock thrashing status are prevented, thereby improving utilization efficiency of processor resources and promoting overall performance of the computer system.
    Type: Application
    Filed: June 5, 2012
    Publication date: February 21, 2013
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Xiaofeng Zhang, Han Zheng
  • Publication number: 20120311876
    Abstract: A cutting element adapted for use with an oscillating power tool having an output shaft that makes an oscillating movement about its own axis. The cutting element has a longitudinally extending main body, a mounting hole and a cutting portion for acting upon a workpiece to be processed. The mounting hole is disposed at a first end of the main body and is adapted to be connected to the output shaft of the oscillating power tool. The cutting portion is provided at a second end of the main body and includes a first cutting portion and a second cutting portion. The first cutting portion has a first cutting blade, the second cutting portion has a second cutting blade, and a distance from the second cutting blade to the axis of the output shaft is greater than a distance from the first cutting blade to the axis of the output shaft.
    Type: Application
    Filed: June 1, 2012
    Publication date: December 13, 2012
    Applicant: CHERVON (HK) LIMITED
    Inventor: Xiaofeng Zhang
  • Publication number: 20120297149
    Abstract: A method and a device for multithread to access multiple copies. The method includes: when multiple threads of a process are distributed to different nodes, creating a thread page directory table whose content is the same as that of a process page directory table of the process, where each thread page directory table includes a special entry which points to specific data and a common entry other than the special entry, each thread corresponds to a thread page directory table, and the specific data is data with multiple copies at different nodes; and when each thread is scheduled and the special entry in the thread page directory table of the each thread does not point to the specific data stored in a node where the thread is located, modifying, based on a physical address of the specific data, the special entry to point to the specific data.
    Type: Application
    Filed: December 28, 2011
    Publication date: November 22, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Wei Wang, Yiyang Liu, Xiaofeng Zhang
  • Publication number: 20120282522
    Abstract: A lithium metal oxide positive electrode material useful in making lithium-ion batteries that is produced using spray pyrolysis. The material comprises a plurality of metal oxide secondary particles that comprise metal oxide primary particles, wherein the primary particles have a size that is in the range of about 1 nm to about 10 ?m, and the secondary particles have a size that is in the range of about 10 nm to about 100 ?m and are uniformly mesoporous.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 8, 2012
    Applicant: Washington University
    Inventors: Richard L. Axelbaum, Xiaofeng Zhang
  • Publication number: 20120272029
    Abstract: A memory access monitoring method and a memory access monitoring method device are disclosed, The method comprises: performing coarse grain monitoring on local memory pages, if a hot page with coarse grain monitoring exists in the local memory pages, requesting an operating system to perform an optimized migration for the content of the hot page, and if a half hot page with coarse grain monitoring exists in the local memory pages, initiating fine grain monitoring to the half hot page; and performing fine grain monitoring on the half hot page, if a hot area with fine grain monitoring exists in the half hot page, requesting the operating system to perform an optimized migration for the content of the hot area.
    Type: Application
    Filed: December 30, 2011
    Publication date: October 25, 2012
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xiaofeng ZHANG, Fan FANG
  • Publication number: 20120272022
    Abstract: A data access processing method and apparatus, the method comprising: copying a kernel code and a global descriptor table on a memory of each of nodes respectively (101); making base addresses of kernel code segments on the respective nodes in the global descriptor table respectively point to linear addresses of the kernel code corresponding to the respective nodes based on a virtual address of the kernel code (102); and recording a mapping relation between the linear addresses of the kernel code corresponding to the respective nodes and physical addresses of the respective nodes in a kernel page table respectively, to enable a process to access the kernel code locally in the respective nodes (103). The apparatus comprises a copying module (401), a modifying module (402) and a recording module (403).
    Type: Application
    Filed: December 29, 2011
    Publication date: October 25, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Wei Wang, Xiaofeng Zhang
  • Patent number: 8274751
    Abstract: A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: September 25, 2012
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Zhu Feng, Xiaofeng Zhang, Ellis T. Cha
  • Publication number: 20120215990
    Abstract: A method and an apparatus for selecting a node where a shared memory is located in a multi-node computing system are provided, improving the total access performance of the multi-node computing system. The method comprises: acquiring parameters for determining a sum of memory affinity weight values between each of the CPUs and a memory on a random one of nodes; calculating the sum of the memory affinity weight values between each of the CPUs and the memory on the random one of the nodes according to the parameters; and selecting the node with the calculated minimal sum of the memory affinity weight values as the node where the shared memory for each of the CPUs is located.
    Type: Application
    Filed: December 29, 2011
    Publication date: August 23, 2012
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Jun Li, Xiaofeng Zhang
  • Patent number: 8139306
    Abstract: A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: March 20, 2012
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Zhu Feng, Xiaofeng Zhang, Ellis T. Cha
  • Publication number: 20110316242
    Abstract: A working component for mating with multiple shaft ends includes a body portion and a clamping portion which is connected to the body portion and suitable for mounting the working component to the shaft ends. The body portion has a work piece processing area for acting on the work piece to be processed and the clamping portion has a mounting hole with a longitudinal axis Y. The clamping portion includes a support portion and a mating portion which is provided with a plurality of projections which extend in a radial direction vertical to the longitudinal axis Y and which are distributed alternately.
    Type: Application
    Filed: January 12, 2011
    Publication date: December 29, 2011
    Applicant: CHERVON (HK) LIMITED
    Inventors: Xiaofeng Zhang, Baijun Zhang
  • Publication number: 20110316241
    Abstract: A working component for mating with multiple shaft ends includes a body portion and a clamping portion which is connected to the body portion and suitable for mounting the working component to the shaft ends. The body portion has a work piece processing area for acting on the work piece to be processed and the clamping portion has a mounting hole with a longitudinal axis Y. The clamping portion includes a support portion and a mating portion which are overlapped along the direction of the longitudinal axis Y.
    Type: Application
    Filed: January 12, 2011
    Publication date: December 29, 2011
    Applicant: CHERVON (HK) LIMITED
    Inventors: Xiaofeng Zhang, Baijun Zhang
  • Publication number: 20110299191
    Abstract: A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head.
    Type: Application
    Filed: April 1, 2011
    Publication date: December 8, 2011
    Inventors: Zhu Feng, Xiaofeng Zhang, Ellis T. Cha
  • Publication number: 20110291368
    Abstract: An adaptor for adapting a working element to an end of a power tool shaft. The adaptor includes a central hole passing through the adaptor and has a longitudinal axis, a driving end facing the end of the shaft, and a tool end facing the working element and having a protruding portion, wherein the driving end is provided with grooves, the grooves and bosses formed between the grooves are alternately arranged around the circumference of the driving end, and the bosses have side faces each facing the central hole and located on a plane passing through an edge of a regular polygon and parallel with the longitudinal axis. The adaptor can thus be used to adapt different kinds of working elements to various kinds of driving shafts having different shapes of shaft end.
    Type: Application
    Filed: January 12, 2011
    Publication date: December 1, 2011
    Applicant: CHERVON (HK) LIMITED
    Inventors: Zhiguo Chen, Xiaofeng Zhang, Baijun Zhang
  • Publication number: 20110227300
    Abstract: An adapter for a multifunctional tool includes a converter with a first form-locating component mating with an output shaft end of the multifunctional tool and a fixer with a form-fit component mateable with the converter.
    Type: Application
    Filed: July 7, 2010
    Publication date: September 22, 2011
    Applicant: CHERVON LIMITED
    Inventors: Xiaofeng Zhang, Zhiguo Chen, Baijun Zhang
  • Publication number: 20100129783
    Abstract: A study evaluation system used for computer-based learning uses evaluation contents arranged in a multilevel arrangement for self-adaptive study evaluation. The study evaluation system provides a present evaluation content to a user through user interaction, and determines a subsequent evaluation content or a subsequent knowledge point to be studied by the user at least partially based on the user feedback on the present evaluation content, the multilevel arrangement of the evaluation contents, and a characteristic information of the user. The study evaluation system may further establish a data set for each user to record the user feedbacks on the evaluation contents, and use the data set in combination with certain basic user information to realize individualized study evaluation.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 27, 2010
    Inventors: Changnian Liang, Pingyi Yan, Xiaofeng Zhang, Yuan Li
  • Patent number: 7675711
    Abstract: A system and method for measuring and neutralizing the electrical charge at the interface of a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A surface treatment material is applied to the magnetic head. The surface treatment material matches the medium surface material on the surface of the magnetic storage medium. The surface treatment material on the magnetic read/write head may be a fluorinated carbon, such as a Fomblin Z-derivative, perfluoro alkyl trichlorosilane, a FC-722, or a fluorinated polymer. The surface treatment material can be applied to the magnetic head by a vapor deposition process or by a liquid immersion process. The charge on the head-disk interface can be measured by applying varying external charges to the head while reading a signal previously written to the disk.
    Type: Grant
    Filed: May 7, 2003
    Date of Patent: March 9, 2010
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Zhu Feng, Ellis Cha, Xiaofeng Zhang
  • Publication number: 20090287619
    Abstract: A computer-based learning system uses knowledge points organized with a predefined multilevel arrangement. Each knowledge point has an information set which may include a knowledge content, an evaluation content and a solution content. For a given knowledge point, the learning system provides the knowledge content and evaluation content, analyzes the user's answers to the evaluation content and determines the next knowledge point to be studied by the user based on the user's answers and the predefined multilevel arrangement of the knowledge points. The learning system thus provides a different learning course for different users to achieve individualized learning. User's learning history may be recorded to facilitate reviews by the user and improve the selection of the next knowledge point. Users may provide feedbacks on knowledge contents and evaluation contents, and may even suggest their own knowledge contents and evaluation contents to improve the learning system and user participation.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 19, 2009
    Inventors: Changnian Liang, Pingyi Yan, Xiaofeng Zhang, Yuan Li
  • Publication number: 20090135512
    Abstract: A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head.
    Type: Application
    Filed: February 3, 2009
    Publication date: May 28, 2009
    Applicant: SAE MAGNETICS (H.K.) LTD.
    Inventors: Zhu FENG, Xiaofeng ZHANG, Ellis T. CHA
  • Patent number: D654429
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: February 21, 2012
    Inventors: Tianwen Li, Xiaofeng Zhang