Patents by Inventor Mingxing Xu
Mingxing Xu 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).
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Publication number: 20220415209Abstract: A permanent magnet generator experimental device for simulating electromechanical cross and complex faults is disclosed. The device includes a base, a DC drive motor, a permanent magnet simulation generator, bearing seats, a stator short circuit wiring board and time relays. A certain degree of radial air-gap eccentricity is set by moving a stator and a stator winding, and then a stator short circuit is set by controlling time relays; or a certain degree of axial air-gap eccentricity is set by moving a stator and a stator winding, and then a stator short circuit is set by controlling time relays. According to the above settings, different degrees of electromechanical cross and complex faults are simulated as required.Type: ApplicationFiled: June 24, 2021Publication date: December 29, 2022Inventors: Guiji TANG, Mingxing XU, Yuling HE, Chenkai SUN, Wen ZHANG, Xiaolong WANG
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Patent number: 10521888Abstract: An aerothermal-radiation correction method, including: using a Gaussian surface to approximate a thermal radiation noise, performing a Fourier transform on the Gaussian surface so as to obtain a centralized spectrum of the thermal radiation noise, constructing a filter function H based on the centralized spectrum of the thermal radiation noise; performing a Fourier transform on the aerothermal-radiation degraded image f so as to obtain a centralized spectrum F, taking dot product of F and H to obtain a filtered spectrum G; and performing an inverse Fourier transform on filtered spectrum G to obtain a modulus, and acquire a corrected image. The method effectively removes background noise generated by aerothermal radiation, greatly improves image quality and image signal-to-noise ratio. The method features reduced computational complexity and a shorter operation time, and is suited for real-time processing.Type: GrantFiled: March 20, 2019Date of Patent: December 31, 2019Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Tianxu Zhang, Xuan Hou, Chuan Zhang, Li Liu, Quan Chen, Ao Zhong, Mingxing Xu, Yutian Zhou
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Publication number: 20190220958Abstract: An aerothermal-radiation correction method, including: using a Gaussian surface to approximate a thermal radiation noise, performing a Fourier transform on the Gaussian surface so as to obtain a centralized spectrum of the thermal radiation noise, constructing a filter function H based on the centralized spectrum of the thermal radiation noise; performing a Fourier transform on the aerothermal-radiation degraded image f so as to obtain a centralized spectrum F, taking dot product of F and H to obtain a filtered spectrum G; and performing an inverse Fourier transform on filtered spectrum G to obtain a modulus, and acquire a corrected image. The method effectively removes background noise generated by aerothermal radiation, greatly improves image quality and image signal-to-noise ratio. The method features reduced computational complexity and a shorter operation time, and is suited for real-time processing.Type: ApplicationFiled: March 20, 2019Publication date: July 18, 2019Inventors: Tianxu ZHANG, Xuan HOU, Chuan ZHANG, Li LIU, Quan CHEN, Ao ZHONG, Mingxing XU, Yutian ZHOU
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Patent number: 10297013Abstract: An aerodynamic optical effect correction and identification integrated real-time processing system, comprising an FPGA module, a multi-core main processor DSP, a plurality of auxiliary processors ASICs and an infrared image non-uniformity correction system-on-chip (SoC). By means of the system, full-image thermal radiation correction, denoising, transmission effect correction and target detection processes of an aerodynamic optical effect degradation image are achieved. Correspondingly, provided is the corresponding method.Type: GrantFiled: April 13, 2016Date of Patent: May 21, 2019Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Tianxu Zhang, Xuan Hou, Chuan Zhang, Li Liu, Quan Chen, Ao Zhong, Mingxing Xu, Yutian Zhou
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Patent number: 10206105Abstract: A method for verifying a user of a mobile device is provided. The method includes selecting a numerical value and generating a direction image based on the numerical value. The direction image may indicate a first position on the direction image and a second position on the mobile device when the direction image is initially displayed on the mobile device. The direction image may have a center point and the numerical value may correspond a central angle between the first position and the second position. The method may further include sending, to the mobile device, the direction image and a command to rotate the mobile device according to the direction image and receiving a magnetometric numerical value detected by the mobile device using a magnetometer. The method may further include determining whether to allow access of a server by the user based on the magnetometric numerical value.Type: GrantFiled: January 12, 2018Date of Patent: February 12, 2019Assignee: ALIBABA GROUP HOLDING LIMITEDInventors: Mingxing Xu, Chaofeng Meng, Yan Xia, Bin Fang, Lei Wang
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Publication number: 20180350041Abstract: An aerothermal radiation effect frequency domain correction method, comprising: use a Gaussian surface to approximate a thermal radiation noise, perform a Fourier transform on the thermal radiation noise to obtain an amplitude spectrum, then normalize and segment the amplitude spectrum to obtain a filter thresholding template, BW, then use the filter thresholding template, BW, to construct a filter function, H; perform a Fourier transform on an image degraded by aerodynamic thermal radiation, f, to obtain a centralized frequency spectrum, F, then take the dot product of F and H to obtain a real-time image frequency spectrum, G; and perform an inverse Fourier transform on G to obtain a modulus, and acquire an image corrected for thermal radiation, g. Using the method effectively removes background noise generated by aerothermal radiation to restore a clear image, greatly improving image quality and image signal-to-noise ratio.Type: ApplicationFiled: April 13, 2016Publication date: December 6, 2018Inventors: Tianxu ZHANG, Xuan HOU, Chuan ZHANG, Li LIU, Quan CHEN, Ao ZHONG, Mingxing XU, Yutian ZHOU
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Patent number: 10127641Abstract: Disclosed in the present invention is a contrast constrained aerothermal radiation correction method. By analyzing features of images at different intensities of aerothermal radiation, it has been discovered that the stronger the aerothermal radiation effect is, the smaller the image contrast becomes, and when thermal radiation correction is performed using a gradient fitting algorithm, it has been discovered that time consumption thereof grows exponentially with an increase in a degree of a fitting surface and with an increase in an image size. The present invention can rapidly and effectively restore an aerothermal radiation image, remarkably improving a signal to noise ratio and quality of the image.Type: GrantFiled: April 13, 2016Date of Patent: November 13, 2018Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Tianxu Zhang, Chuan Zhang, Xuan Hou, Li Liu, Quan Chen, Ao Zhong, Mingxing Xu, Yutian Zhou
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Publication number: 20180293709Abstract: An aerodynamic optical effect correction and identification integrated real-time processing system, comprising an FPGA module, a multi-core main processor DSP, a plurality of auxiliary processors ASICs and an infrared image non-uniformity correction system-on-chip (SoC). By means of the system, full-image thermal radiation correction, denoising, transmission effect correction and target detection processes of an aerodynamic optical effect degradation image are achieved. Correspondingly, provided is the corresponding method.Type: ApplicationFiled: April 13, 2016Publication date: October 11, 2018Inventors: Tianxu ZHANG, Xuan HOU, Chuan ZHANG, Li LIU, Quan CHEN, Ao ZHONG, Mingxing XU, Yutian ZHOU
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Publication number: 20180286017Abstract: Disclosed in the present invention is a contrast constrained aerothermal radiation correction method. By analyzing features of images at different intensities of aerothermal radiation, it has been discovered that the stronger the aerothermal radiation effect is, the smaller the image contrast becomes, and when thermal radiation correction is performed using a gradient fitting algorithm, it has been discovered that time consumption thereof grows exponentially with an increase in a degree of a fitting surface and with an increase in an image size. The present invention can rapidly and effectively restore an aerothermal radiation image, remarkably improving a signal to noise ratio and quality of the image.Type: ApplicationFiled: April 13, 2016Publication date: October 4, 2018Inventors: Tianxu ZHANG, Chuan ZHANG, Xuan HOU, Li LIU, Quan CHEN, Ao ZHONG, Mingxing XU, Yutian ZHOU
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Patent number: 10027641Abstract: The present disclosure discloses a method and an apparatus of account login to solve the problem of low efficiency of account login in existing technologies. A client of the method captures an image of a first credential of a user, recognizes user information of the user that is included in the captured image, includes the recognized user information into a login request, and sends the login request to a server for logging into an account that corresponds to the user information. Through this method, a user does not need to input his/her username when using a client for account login, but perform the account login by directly capturing an image of a first credential using an image capturing device of the client, thus effectively improving the efficiency of account login.Type: GrantFiled: December 3, 2013Date of Patent: July 17, 2018Assignee: Alibaba Group Holding LimitedInventors: Chao Feng Meng, Xiaowei Chen, Lingyun Chen, Yan Xia, Mingxing Xu, Lei Wang, Feng Zhu, Ji Xu
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Publication number: 20180139611Abstract: A method for verifying a user of a mobile device is provided. The method includes selecting a numerical value and generating a direction image based on the numerical value. The direction image may indicate a first position on the direction image and a second position on the mobile device when the direction image is initially displayed on the mobile device. The direction image may have a center point and the numerical value may correspond a central angle between the first position and the second position. The method may further include sending, to the mobile device, the direction image and a command to rotate the mobile device according to the direction image and receiving a magnetometric numerical value detected by the mobile device using a magnetometer. The method may further include determining whether to allow access of a server by the user based on the magnetometric numerical value.Type: ApplicationFiled: January 12, 2018Publication date: May 17, 2018Inventors: Mingxing XU, Chaofeng MENG, Yan XIA, Bin FANG, Lei WANG
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Patent number: 9877189Abstract: A method for verifying a user of a mobile device is provided. The method includes selecting a numerical value and generating a direction image based on the numerical value. The direction image may indicate a first position on the direction image and a second position on the mobile device when the direction image is initially displayed on the mobile device. The direction image may have a center point and the numerical value may correspond a central angle between the first position and the second position. The method may further include sending, to the mobile device, the direction image and a command to rotate the mobile device according to the direction image and receiving a magnetometric numerical value detected by the mobile device using a magnetometer. The method may further include determining whether to allow access of a server by the user based on the magnetometric numerical value.Type: GrantFiled: April 2, 2015Date of Patent: January 23, 2018Assignee: ALIBABA GROUP HOLDING LIMITEDInventors: Mingxing Xu, Chaofeng Meng, Yan Xia, Bin Fang, Lei Wang
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Publication number: 20150304845Abstract: A method for verifying a user of a mobile device is provided. The method includes selecting a numerical value and generating a direction image based on the numerical value. The direction image may indicate a first position on the direction image and a second position on the mobile device when the direction image is initially displayed on the mobile device. The direction image may have a center point and the numerical value may correspond a central angle between the first position and the second position. The method may further include sending, to the mobile device, the direction image and a command to rotate the mobile device according to the direction image and receiving a magnetometric numerical value detected by the mobile device using a magnetometer. The method may further include determining whether to allow access of a server by the user based on the magnetometric numerical value.Type: ApplicationFiled: April 2, 2015Publication date: October 22, 2015Inventors: Mingxing XU, Chaofeng MENG, Yan XIA, Bin FANG, Lei WANG
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Publication number: 20140165171Abstract: The present disclosure discloses a method and an apparatus of account login to solve the problem of low efficiency of account login in existing technologies. A client of the method captures an image of a first credential of a user, recognizes user information of the user that is included in the captured image, includes the recognized user information into a login request, and sends the login request to a server for logging into an account that corresponds to the user information. Through this method, a user does not need to input his/her username when using a client for account login, but perform the account login by directly capturing an image of a first credential using an image capturing device of the client, thus effectively improving the efficiency of account login.Type: ApplicationFiled: December 3, 2013Publication date: June 12, 2014Applicant: Alibaba Group Holding LimitedInventors: Chao Feng Meng, Xiaowei Chen, Lingyun Chen, Yan Xia, Mingxing Xu, Lei Wang, Feng Zhu, Ji Xu