中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

81 records (took 0.021 seconds)

    ANNULAR-IRRADIATION HIGH-RESOLUTION QUANTITATIVE PHASE MICROIMAGING METHOD BASED ON LIGHT INTENSITY TRANSFER EQUATION
    22.
    发明申请
    ANNULAR-IRRADIATION HIGH-RESOLUTION QUANTITATIVE PHASE MICROIMAGING METHOD BASED ON LIGHT INTENSITY TRANSFER EQUATION 有权

    公开(公告)号：US20210103135A1

    公开(公告)日：2021-04-08

    申请号：US16496548

    申请日：2018-02-26

    Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： Qian CHEN ,  Chao ZUO ,  Jiasong SUN ,  Shijie FENG ,  Yuzhen ZHANG ,  Guohua GU

    IPC: G02B21/36 ,  G02B21/06 ,  G06T5/50 ,  G06T5/10

    Abstract: Annular-irradiation high-resolution quantitative phase microimaging based on light intensity transfer equation is proposed here. First, an annular aperture is designed for the imaging system illumination. And then, by invoking the weak object approximation, the parameters of annular illumination aperture and bright field microscopy are used to calculate a weak object optical transfer function (WOTF) on the basis of a partially coherent imaging theory. Finally, three intensity images are collected by a camera and the quantitative phase image of object is obtained by resolving the light intensity transfer equation with a deconvolution algorithm.
    The present method effectively resolves the tradeoff between the cloudy low-frequency noise and high-frequency fuzziness in the light intensity transfer equation, and the spatial imaging resolution of phase reconstruction is greatly increased. The achievable resolution is up to twice the objective lens numerical aperture resolution of bright field microscope with more robust of low-frequency noise. There is no need to have a complicated modification of traditional bright field microscopy, and the annular aperture enables the capability of high-resolution quantitative phase imaging with a bright field microscope.

    METHOD FOR INITIATING A GRAPHENE OXIDE THROUGH REDUCTION BY A REDUCTANT TO CONTROLLABLY RELEASE ORGANIC COMPOUNDS
    23.
    发明申请
    METHOD FOR INITIATING A GRAPHENE OXIDE THROUGH REDUCTION BY A REDUCTANT TO CONTROLLABLY RELEASE ORGANIC COMPOUNDS 审中-公开

    公开(公告)号：US20190389743A1

    公开(公告)日：2019-12-26

    申请号：US16155212

    申请日：2018-10-09

    Applicant: PEKING UNIVERSITY ,  NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： DONGQIANG ZHU ,  BINGYU WANG ,  CHENHUI WEI

    IPC: C02F1/28 ,  B01J20/20 ,  B01J20/34 ,  G01N30/14

    Abstract: The present invention discloses a method for initiating a graphene oxide (GO) through reduction by a reductant to controllably release organic compounds, comprising the following steps: (1) mixing GO and a buffer solution; (2) further mixing with a sewage containing organic contaminants; (3) conducting solid-liquid separation, mixing the solid phase and the pure, introducing and N2; (4) further adding the reductant; (5) conducting sequential batch kinetics experiment. The present invention utilizes the size effect and polarity control of GO to selectively adsorb aromatic organic contaminants in sewage and fully transfer the selectively adsorbed organic contaminants from a large amount of sewage to a small amount of pure water by initiating using the reductant, and no extraction of the organic phase is required, the time for purification is reduced, and the energy consumption for purification is also reduced.

    Single-shot differential phase contrast quantitative phase imaging method based on color multiplexed illumination
    27.
    发明授权
    Single-shot differential phase contrast quantitative phase imaging method based on color multiplexed illumination 有权

    公开(公告)号：US11893719B2

    公开(公告)日：2024-02-06

    申请号：US17766088

    申请日：2020-08-18

    Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY

    Inventor： Qian Chen ,  Yao Fan ,  Chao Zuo ,  Jiasong Sun ,  Xiangpeng Pan ,  Shijie Feng ,  Yuzhen Zhang ,  Guohua Gu ,  Jiaji Li ,  Jialin Zhang

    IPC: G06T5/50 ,  G02B21/36

    CPC classification number: G06T5/50 ,  G02B21/367

    Abstract: A single-shot differential phase contrast quantitative phase imaging method based on color multiplexing illumination. A color multiplexing illumination solution is used to realize single-shot differential phase contrast quantitative phase imaging. In the single-shot color multiplexing illumination solution, three illumination wavelengths of red, green, and blue are used to simultaneously illuminate a sample, and the information of the sample in multiple directions is converted into intensity information on different channels of a color image. By performing channel separation on this color image, the information about the sample at different spatial frequencies can be obtained. Such a color multiplexing illumination solution requires only one acquired image, thus enhancing the transfer response of the phase transfer function of single-shot differential phase contrast imaging in the entire frequency range, and achieving real-time dynamic quantitative phase imaging with a high contrast, a high resolution, and a high stability. In addition, an alternate illumination strategy is provided, so that a completely isotropic imaging resolution at the limit acquisition speed of the camera can be achieved.

    MOTOR ROTOR, MOTOR, AND ELECTRIC VEHICLE
    28.
    发明公开
    MOTOR ROTOR, MOTOR, AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：US20240039350A1

    公开(公告)日：2024-02-01

    申请号：US18477314

    申请日：2023-09-28

    Applicant: Huawei Digital Power Technologies Co., Ltd. ,  Nanjing University of Science and Technology

    Inventor： Weiwei Geng ,  Chaoqiang Wu ,  Jinhua Chen ,  Zhao Zhou

    IPC: H02K1/2795 ,  H02K21/24 ,  B60K1/00

    CPC classification number: H02K1/2795 ,  H02K21/24 ,  B60K1/00 ,  B60L50/60

    Abstract: A motor rotor, a motor, and an electric vehicle are disclosed. The motor rotor includes an iron core yoke, a spoke plate, and at least two permanent magnets. The at least two permanent magnets are fastened to the iron core yoke and sequentially spaced apart in the circumferential direction. The spoke plate is located between adjacent permanent magnets. A quadrature-axis magnetic circuit is reserved between adjacent permanent magnets, and the spoke plate whose reluctance is less than that of air or the permanent magnet material is disposed on the quadrature-axis magnetic circuit, that is, the spoke plate is disposed between the adjacent permanent magnets. In this way, reluctance of the quadrature-axis magnetic circuit may be reduced, and quadrature-axis inductance may be increased. Accordingly, a reluctance torque is increased, and a torque output capability of the motor is improved.

    Calibration method for fringe projection systems based on plane mirrors
    29.
    发明授权
    Calibration method for fringe projection systems based on plane mirrors 有权

    公开(公告)号：US11808564B2

    公开(公告)日：2023-11-07

    申请号：US17631542

    申请日：2020-08-07

    Applicant: Nanjing University of Science and Technology

    Inventor： Chao Zuo ,  Wei Yin ,  Qian Chen ,  Shijie Feng ,  Jiasong Sun ,  Tianyang Tao ,  Yan Hu ,  Liang Zhang ,  Jiaming Qian

    IPC: G01B11/25

    CPC classification number: G01B11/2504 ,  G01B11/2513 ,  G01B11/2527

    Abstract: A calibration method for fringe projection systems based on plane mirrors. Firstly, two mirrors are placed behind the tested object. Through the reflection of mirrors, the camera can image the measured object from the front and other two perspectives, so as to obtain 360-degree two-dimensional information of the measured object. The projector projects three sets of phase-shifting fringe patterns with frequencies of 1, 8, and 64. The camera captures the fringe image to obtain an absolute phase map with a frequency of 64 by using the phase-shifting method and the temporal phase unwrapping algorithm. By using the calibration parameters between the projector and the camera, the absolute phase map can be converted into three-dimensional information of the measured object. Then, the mirror calibration is realized by capturing a set of 3D feature point pairs, so that the 3D information from different perspectives is transformed into a unified world coordinate system. The calibration method does not need to artificially fix the feature pattern on plane mirrors, only needs to capture a set of 3D feature point pairs by the camera to directly realize the mirror calibration that it avoids the loss of measurement accuracy and realizes high-precision panoramic three-dimensional measurement.

    SINGLE VECTOR-BASED FINITE CONTROL SET MODEL PREDICTIVE CONTROL METHOD OF TWO PARALLEL POWER CONVERTERS
    30.
    发明公开
    SINGLE VECTOR-BASED FINITE CONTROL SET MODEL PREDICTIVE CONTROL METHOD OF TWO PARALLEL POWER CONVERTERS 审中-公开

    公开(公告)号：US20230344367A1

    公开(公告)日：2023-10-26

    申请号：US18127061

    申请日：2023-03-28

    Applicant: Nanjing University of Science and Technology

    Inventor： Zhiyong ZENG ,  Li YANG ,  Zhen CUI ,  Xiaoliang JIN ,  Lei LI ,  Diming ZHANG

    IPC: G05B13/04 ,  H02M7/525 ,  G05B17/02

    CPC classification number: G05B13/048 ,  H02M7/525 ,  G05B13/042 ,  G05B17/02

    Abstract: This invention proposes a single-vector-based finite control set model predictive control for two parallel power converters, which adopts a centralized control structure to achieve accurate control of overall performance. It establishes predictive models for line currents and three phase-circulating currents and constructs a novel cost function that uses these currents as performance indices to implement the predictive control algorithm based on the proposed predictive models. The invention proposes dynamic weighting coefficients and adjustment principles to improve system control performance. A finite set output signal matrix containing important characteristic information of all alternative vectors is constructed to avoid redundant calculations in each control horizon, reducing computation time during practical implementation. This invention addresses the limitations of existing one-vector-based FCS-MPC for two paralleled power converters, which controls each sub-converter individually with a set of available eight control actions and cannot effectively regulate the overall performance of the two paralleled power converters.

Patent Agency Ranking