Patents by Inventor Xiaoqiang Zhang

Xiaoqiang 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).

  • Patent number: 11127578
    Abstract: The ion guiding device comprises a first electrode assembly comprising two parallel electrode units arranged along a spatial axis; a second electrode assembly comprising at least two non-parallel electrode units arranged in a plane between the parallel electrode units along the spatial axis, wherein a space enclosed by the first electrode assembly and second electrode assembly forms an ion transmission channel along the spatial axis; and, a power supply device, which is configured to apply RF voltages with different polarities to the first electrode assembly and the second electrode assembly to generate a RF electric field in the directions perpendicular to the spatial axis to confine ions, and separately apply DC voltages to the first electrode assembly and the second electrode assembly to generate a certain DC voltage difference, to generate a DC electric field along the spatial axis to control the movement of ions.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: September 21, 2021
    Assignee: SHIMADZU CORPORATION
    Inventors: Yupeng Cheng, Xiaoqiang Zhang, Wenjian Sun
  • Publication number: 20210224568
    Abstract: The present disclosure discloses a method and apparatus for recognizing a text. The method comprises: acquiring images of a text area of an input image, the acquired images including a text centerline graph, a text direction offset graph, a text boundary offset graph, and a text character classification graph; extracting coordinates of feature points of a character center from the text centerline graph; sorting the extracted coordinates of the feature points based on the text direction offset graph to obtain a coordinate sequence of the feature points; determining a polygonal bounding box of the text area based on the coordinate sequence of the feature points of the character center and the text boundary offset graph; and determining a classification result of the feature points of the character center, based on the coordinate sequence of the feature points of the character center and the text character classification graph.
    Type: Application
    Filed: March 23, 2021
    Publication date: July 22, 2021
    Applicant: Beijing Baidu Netcom Science and Technology Co., Ltd.
    Inventors: Xiaoqiang Zhang, Pengyuan LV, Shanshan Liu, Chengquan Zhang
  • Publication number: 20210209401
    Abstract: A character recognition method, a character recognition apparatus, an electronic device and a computer readable storage medium are disclosed. The character recognition method includes: determining semantic information and first position information of each individual character recognized from an image; constructing a graph network according to the semantic information and the first position information of each individual character; and determining a character recognition result of the image according to a feature of each individual character calculated by the graph network.
    Type: Application
    Filed: March 23, 2021
    Publication date: July 8, 2021
    Applicant: Beijing Baidu Netcom Science and Technology Co., LTD
    Inventors: Xiaoqiang Zhang, Chengquan Zhang, Shanshan Liu
  • Patent number: 11031218
    Abstract: A data acquisition method in a mass spectrometer includes a. providing an ion source to generate precursor ions; b. feeding the precursor ions into a first mass analyzer that selects one mass window such that the precursor ions located outside the mass window pass through the first mass analyzer and the precursor ions located within the mass window cannot pass through the first mass analyzer; c. feeding the precursor ions passing through the first mass analyzer into a collision cell for collisional dissociation, to generate product ions; d. feeding the product ions into a second mass analyzer for mass analysis and recording a spectrum; and e. repeating Steps b-d. Each time when Step b is repeatedly performed, the selected mass window does not overlap with all the mass windows previously selected. After all the mass windows in a mass range are selected, the repetition is stopped.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: June 8, 2021
    Assignee: SHIMADZU CORPORATION
    Inventors: Xiaoqiang Zhang, Yunqing Huang, Wenjian Sun
  • Patent number: 11031224
    Abstract: An ion guiding device includes ring electrodes with a same size disposed in parallel; wherein a connection line of centers of the ring electrodes is defined as an axis, a normal of a plane where any of the ring electrodes is located and a tangent line of the axis at a center of the ring electrode form an included angle being a range of (0, 90) degrees; a radio-frequency voltage source, for applying an out-phase radio-frequency voltage on a neighboring ring electrode along the axis, so that ions are confined inside the ring electrode during a transmission process; and a direct-current voltage source, applying a direct-current voltage with an amplitude changing along the axis on the ring electrode, so that the ions are transmitted along the axis and focused to a position closer to an inner surface of the ring electrode along a direction of the normal.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: June 8, 2021
    Assignee: SHIMADZU CORPORATION
    Inventors: Keke Wang, Xiaoqiang Zhang, Wenjian Sun
  • Patent number: 11031216
    Abstract: A data acquisition method for a mass spectrometer includes providing at least one ion source for generating ions; not fragmenting or less fragmenting the ions when a collision cell is in a first working mode; recording a mass spectrum of the ions generated in the first working mode; selecting more than one ion from the ions, the more than one ion being distributed in a plurality of discontinuous mass-to-charge ratio channels; partially fragmenting the selected ions when the collision cell is in a second working mode; recording a mass spectrum of the ions generated in the second working mode; and, repetitively executing the above steps for several times. The ions distributed in the discontinuous mass-to-charge ratio channels is always selected during the subsequent repeated execution, until the ion intensity of the selected ions is less than a set value.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: June 8, 2021
    Assignee: SHIMADZU CORPORATION
    Inventors: Yunqing Huang, Wenjian Sun, Xiaoqiang Zhang
  • Publication number: 20210134583
    Abstract: The present invention discloses an ion guide device and associated method as well as a mass spectrometer. A pair of parallel electrode assemblies, among the electrode assemblies surrounding a spatial axis to form an ion transmission channel, is segmented along a certain direction, so that a DC voltage can be separately applied to the segmented electrodes to form a DC potential gradient. In this way, not only one axial electric field component along the said spatial axis but also the other component in the direction perpendicular to the said spatial axis can be provided to control the motion of ions in the ion transmission channel. As a result, the previous problems of low analysis speed, limited ion incident energy, difficulty to balance the device structure simplification and the performance optimization and the like are solved.
    Type: Application
    Filed: May 18, 2017
    Publication date: May 6, 2021
    Inventors: Yupeng CHENG, Xiaoqiang ZHANG, Wenjian SUN
  • Publication number: 20210134575
    Abstract: The ion guiding device comprises a first electrode assembly comprising two parallel electrode units arranged along a spatial axis; a second electrode assembly comprising at least two non-parallel electrode units arranged in a plane between the parallel electrode units along the spatial axis, wherein a space enclosed by the first electrode assembly and second electrode assembly forms an ion transmission channel along the spatial axis; and, a power supply device, which is configured to apply RF voltages with different polarities to the first electrode assembly and the second electrode assembly to generate a RF electric field in the directions perpendicular to the spatial axis to confine ions, and separately apply DC voltages to the first electrode assembly and the second electrode assembly to generate a certain DC voltage difference, to generate a DC electric field along the spatial axis to control the movement of ions.
    Type: Application
    Filed: July 24, 2017
    Publication date: May 6, 2021
    Applicant: SHIMADZU CORPORATION
    Inventors: Yupeng CHENG, Xiaoqiang ZHANG, Wenjian SUN
  • Patent number: 10878872
    Abstract: A memory cell includes a memory cell stack, a first word line, a second word line, a bit line coupled to one end of the memory cell stack, a first unidirectional selector having one end coupled to another end of the memory cell stack and another end coupled to the first word line, and a second unidirectional selector having one end coupled to the another end of the memory cell stack and another end coupled to the second word line. Current flow directions of the first unidirectional selector and the second unidirectional selector are opposite to each other.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: December 29, 2020
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Randy Osborne, Kevin Xiaoqiang Zhang
  • Patent number: 10825670
    Abstract: The invention provides signal processing method and system and an electronic apparatus for analysis of time-of-flight mass spectra. The method includes digitalizing an analog signal output from an ion detector to acquire complete raw time-of-flight spectra or each effective part in the raw time-of-flight spectra for a plurality of times; if the complete raw time-of-flight spectra are acquired, extracting the effective parts of each raw time-of-flight spectrum; applying a one-dimensional wavelet transform to each effective part to map to each frequency band or scale; determining positions and intensities of each spectral peak in each raw time-of-flight spectrum by detecting the maxima of an obtained wavelet coefficient distribution, and saving said peak position and intensity as characteristic data of each spectral peak; accumulating the characteristic data obtained by processing each raw time-of-flight spectrum and stacking the data to form spectral peak intensity/time-of-flight histogram.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: November 3, 2020
    Assignee: SHIMADZU CORPORATION
    Inventors: Jiaqi Shen, Wenjian Sun, Xiaoqiang Zhang
  • Publication number: 20200335435
    Abstract: Interconnect structures and methods of fabricating an interconnect structure. A first interconnect and a second interconnect extend in a first direction in a interlayer dielectric layer and are spaced apart from each other. A third interconnect is arranged in the interlayer dielectric layer to connect the first interconnect with the second interconnect. The first interconnect and the second interconnect have a first width, and the third interconnect has a second width that is less than the first width.
    Type: Application
    Filed: July 1, 2020
    Publication date: October 22, 2020
    Inventors: Jiehui Shu, Xiaoqiang Zhang, Haizhou Yin, Moosung M. Chae, Jinping Liu, Hui Zang
  • Patent number: 10784195
    Abstract: Interconnect structures and methods of fabricating an interconnect structure. A first interconnect and a second interconnect extend in a first direction in a interlayer dielectric layer and are spaced apart from each other. A third interconnect is arranged in the interlayer dielectric layer to connect the first interconnect with the second interconnect. The first interconnect and the second interconnect have a first width, and the third interconnect has a second width that is less than the first width.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: September 22, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Jiehui Shu, Xiaoqiang Zhang, Haizhou Yin, Moosung M. Chae, Jinping Liu, Hui Zang
  • Publication number: 20200278330
    Abstract: A data acquisition and analysis method for a mass spectrometer includes providing at least one ion source for generating ions, the generated ions containing ions of a substance to be analyzed; dividing the full mass-to-charge ratio range of the ions of the substance into several mass-to-charge ratio windows, feeding ions corresponding to different mass-to-charge ratio windows into a collision cell to fragment at least part of the corresponding ions, and recording mass spectra of the ions passing through the collision cell as corresponding product ion spectra; obtaining a mass-to-charge ratio window corresponding to the product ion spectra obtained by the searching; within the mass-to-charge ratio range of the obtained mass-to-charge ratio window, obtaining ion peaks from the product ion spectra obtained by the searching; and determining whether ions corresponding to the obtained ion peaks are precursor ions corresponding to the product ion spectra obtained by the searching.
    Type: Application
    Filed: November 14, 2018
    Publication date: September 3, 2020
    Inventors: Yunqing HUANG, Wenjian SUN, Xiaoqiang ZHANG
  • Patent number: 10763098
    Abstract: An ion optical device includes one or more pairs of confinement electrode units arranged at two sides of a first direction; a power supply device for applying opposite radio-frequency voltages to the paired confinement electrode units respectively and forming thereon DC potentials distributed in a second direction orthogonal to the first direction to form a potential barrier herein over a length portion of the first direction; one first area and one second area positioned at two sides of the potential barrier in the second direction; and a control device connected with the power supply device for controlling an output thereof to change the potential barrier to manipulate the ions transported/stored in the first area being transferred to the second area through the potential barrier in ways based on the mass to charge ratio or mobility of the ions and continue being transported along the first direction.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: September 1, 2020
    Assignee: SHIMADZU CORPORATION
    Inventors: Gongyu Jiang, Wenjian Sun, Yupeng Cheng, Xiaoqiang Zhang
  • Publication number: 20200273685
    Abstract: The invention relates to an ion source for generating ions for calibrating a mass spectrometer and methods for calibrating the mass spectrometer using the generated ions. The ion source includes a container used for containing a sample; an ionization device used for ionizing a sample by plasma discharge to generate ions for calibrating the mass spectrometer, where the ionization device operates at atmospheric pressure; and a delivery device for delivering the sample from the container to the ionization device. The method includes generating ions by plasma discharge at atmospheric pressure using a sample; inputting at least one part of the ions into the mass spectrometer to obtain a mass spectrogram; and calibrating the mass spectrometer according to the mass spectrogram.
    Type: Application
    Filed: November 15, 2019
    Publication date: August 27, 2020
    Inventors: Liang WANG, Wenjian SUN, Xiaoqiang ZHANG
  • Publication number: 20200266041
    Abstract: A data acquisition method in a mass spectrometer includes a. providing an ion source to generate precursor ions; b. feeding the precursor ions into a first mass analyzer that selects one mass window such that the precursor ions located outside the mass window pass through the first mass analyzer and the precursor ions located within the mass window cannot pass through the first mass analyzer; c. feeding the precursor ions passing through the first mass analyzer into a collision cell for collisional dissociation, to generate product ions; d. feeding the product ions into a second mass analyzer for mass analysis and recording a spectrum; and e. repeating Steps b-d. Each time when Step b is repeatedly performed, the selected mass window does not overlap with all the mass windows previously selected. After all the mass windows in a mass range are selected, the repetition is stopped.
    Type: Application
    Filed: October 29, 2018
    Publication date: August 20, 2020
    Inventors: Xiaoqiang ZHANG, Yunqing HUANG, Wenjian SUN
  • Patent number: 10741379
    Abstract: The invention provides a mass spectrometer, an ion optical device, and a method for ion manipulation in a mass spectrometer. The mass spectrometer includes a mass analyzer; and an ion guiding device, including two electrode arrays positioned in parallel with each other, each electrode array including at least two ring electrodes concentrically disposed or at least three linear electrode assemblies having a radial distribution; and a power supply means, configured to apply a voltage on at least a part of the ring electrodes, to form a radio-frequency electric field and a DC electric field. By means of the radio-frequency electric field and the DC electric field, ions are allowed to be stored in a region between the two arrays, and controlled to be sequentially released along a radial direction according to a preset mass-to-charge ratio requirement, then exit the ion guiding device and enter the mass analyzer for mass analysis.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: August 11, 2020
    Assignee: SHIMADZU CORPORATION
    Inventors: Xiaoqiang Zhang, Wenjian Sun
  • Patent number: 10739308
    Abstract: The invention provides ion mobility analyzer and analysis method. The analyzer includes an ion source, a first drift/analyzer region provided with an ions entrance, a second drift/analyzer region provided with an ions exit, a connection region connecting the first drift/analyzer region and the second drift/analyzer region, and a detector connected to the ion exit. Direct current electric fields and gas flows in the first drift/analyzer region and the second drift/analyzer region apply opposing forces on ions, and first and second gas flows have the same gas flow direction. The connection region includes a third direct current electric field that causes ions to transfer from the first drift/analyzer region to the second drift/analyzer region. Because the first and second regions have the same gas flow direction, the invention achieves stable resolution and sensitivity as a high-resolution ion mobility analyzer and/or an ion mobility filter for a continuous ion beam.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: August 11, 2020
    Assignee: SHIMADZU RESEARCH LABORATORY (SHANGHAI) CO., LTD.
    Inventors: Kent James Gillig, Keke Wang, Wenjian Sun, Xiaoqiang Zhang
  • Patent number: 10714422
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to an anti-fuse with self-aligned via patterning and methods of manufacture. The anti-fuse includes: a lower wiring layer composed of a plurality of lower wiring structures; at least one via structure in direct contact and misaligned with a first wiring structure of the plurality of lower wiring structures and offset from a second wiring structure of the plurality of lower wiring structures; and an upper wiring layer composed of at least one upper wiring structure in direct contact with the at least one via structure.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: July 14, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Xiaoqiang Zhang, Guoxiang Ning, Jiehui Shu
  • Publication number: 20200134438
    Abstract: A resistive network include multiple resistive units; each resistive unit is made up of multiple resistive elements, which can be arranged in a parallel configuration. Each of the resistive elements can be programmable (e.g., switched on or off, or set to one of multiple resistance values). Furthermore, a method of analog computing includes configuring multiple resistive elements in each of multiple resistive units and configuring the resistive units into a network. The configuration of the resistive elements can be, for example, arranging them into a parallel combination. The method further includes programming each resistive unit, for example, by switching individual resistive elements into, or out of, the parallel combination.
    Type: Application
    Filed: October 14, 2019
    Publication date: April 30, 2020
    Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Randy Osborne, Kevin Xiaoqiang Zhang