Patents by Inventor Xun Li
Xun Li 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: 20210278496Abstract: The present disclosure provides a UAV control method. The method includes controlling an antenna device of a microwave radar of the UAV to transmit a microwave transmission signal and obtain a received signal, the microwave transmission signal and the received signal both being trapezoidal modulation waveforms, and one cycle of the trapezoidal modulation waveform including a frequency rising part, a frequency falling part, and a fixed frequency part; obtaining an intermediate frequency signal mixed by a frequency of the microwave transmission signal and the received signal to the radar controller, and determining whether the received signal is an interference signal based on the intermediate frequency signal; determining coordinate information of a detection target corresponding to the received signal if the received signal is not the interference signal; and updating a trajectory of the UAV based on the coordinate information of the detection target.Type: ApplicationFiled: May 20, 2021Publication date: September 9, 2021Inventors: Xun LI, Chunming WANG
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Patent number: 10994386Abstract: An ultrasonic peening-type integrated machining method for cutting and extrusion includes: applying transverse ultrasonic vibration or a vibration component, which is vertical to a cutting speed direction to a cutting tool on a machine tool; setting a cutting parameter and an ultrasonic vibration parameter such that a dynamic negative clearance angle is generated in a cutting procedure and a flank face of the cutting tool conducts ultrasonic peening extrusion on the surface of the workpiece; setting an extrusion overlap ratio; setting a wear standard of flank faces extruded by the cutting tool; controlling a vibration cutting trajectory phase difference of the cutting tool during two adjacent rotations; and turning on the machine tool in order to ensure that cutting and surface extrusion strengthening of the workpiece are completed in one procedure without separate strengthening procedures. The method conducts extrusion strengthening on the surface of the workpiece while cutting the workpiece.Type: GrantFiled: August 19, 2019Date of Patent: May 4, 2021Assignee: Beihang UniversityInventors: Deyuan Zhang, Zhenghui Lu, Xun Li, Xinggang Jiang, Shenliang Yang, Xiangyu Zhang, Daxi Geng
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Publication number: 20210105123Abstract: Embodiments provide a CSI-RS sending method and device, and a base station. The CSI-RS sending method includes: receiving capability indication information of each user equipment UE in a cell; determining N transmission schemes based on the capability indication information; configuring CSI-RS resources to be multiplexed by CSI-RSs corresponding to the N transmission schemes; and sending, to corresponding UE based on each of the N transmission schemes, a CSI-RS that is carried on the CSI-RS resource and that corresponds to the corresponding transmission scheme. It can be learned that according to the technical solutions in the embodiments of this application, when resources are limited, CSI-RSs corresponding to different transmission schemes are sent in a resource multiplexing manner, so that a plurality of transmission schemes can be compatible, and resource utilization can be improved.Type: ApplicationFiled: December 18, 2020Publication date: April 8, 2021Inventors: Yajun LUO, Xun LI, Chaofeng WEI, Zhen HUANGFU
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Publication number: 20210042475Abstract: Provided are computer implemented systems and methods for providing improved language translation, including translation of input text to an output translated text element. This may include providing for rule-based language translation. This may further include a plurality of machine translation models adapted to different translation domains. A machine translation selector is described that selects an in-domain machine translator from the plurality of machine translation models based on an input text element. The selected in-domain machine translator may generate a first translated text element from the input text element. A post-editor module may generate a second translated text element by predicting a post-edit to the first translated text element. The first translated text element and the second translated text element are evaluated by a quality evaluation model that determines a first metric associated with the first translated text element and a second metric associated with the second text element.Type: ApplicationFiled: July 27, 2020Publication date: February 11, 2021Inventors: Renxian Zhang, Jinnan Lu, Zhanxuan Ding, Jie Ma, Syed Salman Ali, Jason Cox, Xun Li
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Publication number: 20200408516Abstract: A method is provided for modeling and analyzing a generalized microscopic stress concentration phenomenon on a machined surface.Type: ApplicationFiled: May 7, 2020Publication date: December 31, 2020Applicant: Beihang UniversityInventors: Xun LI, Zhiyuan GUO, Shenliang YANG
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Publication number: 20200346313Abstract: An ultrasonic peening-type integrated machining method for cutting and extrusion includes: applying transverse ultrasonic vibration or a vibration component, which is vertical to a cutting speed direction to a cutting tool on a machine tool; setting a cutting parameter and an ultrasonic vibration parameter such that a dynamic negative clearance angle is generated in a cutting procedure and a flank face of the cutting tool conducts ultrasonic peening extrusion on the surface of the workpiece; setting an extrusion overlap ratio; setting a wear standard of flank faces extruded by the cutting tool; controlling a vibration cutting trajectory phase difference of the cutting tool during two adjacent rotations; and turning on the machine tool in order to ensure that cutting and surface extrusion strengthening of the workpiece are completed in one procedure without separate strengthening procedures. The method conducts extrusion strengthening on the surface of the workpiece while cutting the workpiece.Type: ApplicationFiled: August 19, 2019Publication date: November 5, 2020Applicant: Beihang UniversityInventors: Deyuan ZHANG, Zhenghui LU, Xun LI, Xinggang JIANG, Shenliang YANG, Xiangyu ZHANG, Daxi GENG
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Publication number: 20200301007Abstract: A radar-based ranging processing method includes obtaining a difference frequency signal of a radar, obtaining input spectrum amplitude data according to the difference frequency signal, obtaining, based on parallel processing, constant false alarm detection values each corresponding to one of spectrum amplitudes of the input spectrum amplitude data, obtaining a target frequency point according to the spectrum amplitudes and the corresponding constant false alarm detection values, and obtaining a distance value between the radar and an obstacle according to the target frequency point.Type: ApplicationFiled: June 9, 2020Publication date: September 24, 2020Inventors: Xun LI, Chunming WANG
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Publication number: 20200068494Abstract: Embodiments of the present disclosure provide a communication method and device for uplink power control. The method comprises receiving a plurality of sets of power control parameters from a network device, each of the plurality of sets being associated with a corresponding one of a plurality of sets of candidate beam patterns for the terminal device. The method further comprises selecting, based on a beam pattern for the terminal device, one of the plurality of sets of power control parameters for uplink transmit power control, the beam pattern for the terminal device being included in the set of candidate beam pattern that is associated with the selected set of power control parameters.Type: ApplicationFiled: November 3, 2017Publication date: February 27, 2020Applicants: Alcatel Lucent, Nokia Technologies OyInventors: Pingping Wen, Huan Sun, Tao Yang, Xun Li, Yi Zhang
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Patent number: 10353803Abstract: A cluster of devices can be identified where results from executing a test by any cluster devices can be considered as being from the same device. Thus, instead of waiting for a single device to produce comparable results, multiple devices from the same cluster can simultaneously perform the test and obtain the needed set of test results more quickly. The technology can identify clusters of devices that are all similar to a primary cluster device. A device pair can be considered similar when (1) a mean each of a set of test results from each device are within a first threshold of each other, (2) a measurement of the consistency of each test result set are within a second threshold of each other, and (3) a measurement of the consistency of a combination of the test results sets is between the consistency measurements of the individual test result sets.Type: GrantFiled: August 21, 2017Date of Patent: July 16, 2019Assignee: Facebook, Inc.Inventors: Eun Chang Lee, Xun Li, Kumar Rangarajan, Michael McKenzie Magruder, Zheng Mi
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Patent number: 10326512Abstract: Embodiments of the present disclosure provide a method and apparatus for multi-input multi-output MIMO communications in a wireless communication network. The method comprises: receiving, from a device, long-term precoding information for the MIMO communication, the long-term precoding information indicating a first group of beams for a first antenna polarization, and a second group of beams for a second antenna polarization (S201); receiving, from the device, short-term precoding information for use in the MIMO communication, the short-term precoding information indicating beams selected respectively from the first group of beams and the second group of beams for different antenna polarizations (S202); constructing a precoding matrix for the MIMO communication according to the long-term precoding information and short-term precoding information (S203); and transmitting data encoded according to the precoding matrix to the device (S204).Type: GrantFiled: July 12, 2016Date of Patent: June 18, 2019Assignee: Alcatel LucentInventors: Xun Li, Nan Li, Min Zhang, Tao Yang
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Patent number: 10324258Abstract: A light emitting device, an optical module and a manufacturing method thereof are disclosed. According to an example of the disclosure, the light emitting device may comprise an optical waveguide chip, a light emitting chip and a grating between the light emitting chip and the optical waveguide chip. The light emitting chip may emit laser light. The grating may couple the laser light emitted from the active layer into the optical waveguide chip in a way that the laser light is output along a length direction of the optical waveguide chip.Type: GrantFiled: April 20, 2017Date of Patent: June 18, 2019Assignees: Hisense Broadband Multimedia Technologies Co., Ltd., Hisense Broadband Multimedia Technologies, Ltd., Huazhong University of Science and TechnologyInventors: Xun Li, Zekun Lin, Hua Zhang
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Patent number: 10256884Abstract: The present invention relates to a method and an apparatus for quantizing channel state information (CSI). According to an embodiment of the present invention, a method for quantizing CSI is provided, which can be implemented on a base station side. The method includes: broadcasting antenna configuration of a base station to a user equipment, wherein the antenna configuration includes an antenna port in a vertical direction and an antenna port in a horizontal direction; sending a reference signal (RS) to the user equipment; receiving a vertical precoder corresponding to the antenna port in a vertical direction and a horizontal precoder corresponding to the antenna port in a horizontal direction that are fed back by the user equipment; and based on the received vertical precoder and horizontal precoder, reconstructing a precoder by using a vertical codebook corresponding to the antenna port in a vertical direction and a horizontal codebook corresponding to the antenna port in a horizontal direction.Type: GrantFiled: March 6, 2014Date of Patent: April 9, 2019Assignee: Alcatel LucentInventors: Xun Li, Qinglin Luo, Tao Yang
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Publication number: 20190057019Abstract: A cluster of devices can be identified where results from executing a test by any cluster devices can be considered as being from the same device. Thus, instead of waiting for a single device to produce comparable results, multiple devices from the same cluster can simultaneously perform the test and obtain the needed set of test results more quickly. The technology can identify clusters of devices that are all similar to a primary cluster device. A device pair can be considered similar when (1) a mean each of a set of test results from each device are within a first threshold of each other, (2) a measurement of the consistency of each test result set are within a second threshold of each other, and (3) a measurement of the consistency of a combination of the test results sets is between the consistency measurements of the individual test result sets.Type: ApplicationFiled: August 21, 2017Publication date: February 21, 2019Inventors: Eun Chang Lee, Xun Li, Kumar Rangarajan, Michael McKenzie Magruder, Zheng Mi
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Patent number: 10053307Abstract: A shuttle van system for a container terminal, including: at least one rail and a transfer device. The transfer device includes a plurality of shuttle vans and a plurality of transition platforms. Each shuttle van includes: a base frame, a wheel group, a wheel driving device, a lifting device, and a supporting plate. Each transition platform includes brackets. The shuttle vans run on the rail between the brackets. The lifting device of the shuttle van is configured to lift the container from the supporting plate. The container is transferred from the supporting plate of the shuttle van to the bracket after contraction of the lifting device.Type: GrantFiled: December 15, 2014Date of Patent: August 21, 2018Assignee: TIANJIN PORT (GROUP) CO., LTD.Inventors: Wei Li, Xun Li, Guoli An, Lianyi Zhu, Qingxin Lv, Rong Yang, Qiang Li
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Publication number: 20180234148Abstract: Embodiments of the present disclosure provide a method and apparatus for multi-input multi-output MIMO communications in a wireless communication network. The method comprises: receiving, from a device, long-term precoding information for the MIMO communication, the long-term precoding information indicating a first group of beams for a first antenna polarization, and a second group of beams for a second antenna polarization (S201); receiving, from the device, short-term precoding information for use in the MIMO communication, the short-term precoding information indicating beams selected respectively from the first group of beams and the second group of beams for different antenna polarizations (S202); constructing a precoding matrix for the MIMO communication according to the long-term precoding information and short-term precoding information (S203); and transmitting data encoded according to the precoding matrix to the device (S204).Type: ApplicationFiled: July 12, 2016Publication date: August 16, 2018Applicant: Alcatel LucentInventors: Xun Li, Nan Li, Min Zhang, Tao Yang
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Publication number: 20180212665Abstract: The present disclosure provides a method and apparatus for generating a codebook for wireless communication, a method and apparatus for generating a precoder for a 3D channel using the codebook in a base station in wireless communication, and a method and apparatus for facilitating generation of a precoder for the codebook in a user equipment in wireless communication. Compared with the prior art, the codebook provided by the present disclosure may be utilized for both horizontal beamforming and vertical beamforming. Compared with traditional precoders, the precoder provided by the present disclosure may control azimuth and downtilt angles of beams. Compared with the prior art, the present disclosure enhances system performance by exploiting vertical spatial gain of the 3D channel.Type: ApplicationFiled: August 8, 2014Publication date: July 26, 2018Applicant: Alcatel LucentInventors: Xun Li, Qinglin Luo
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Publication number: 20180100218Abstract: The invention relates to a process for forming a cobalt-iron alloy film. In particular, the process is performed under ultrasonic vibrations to form the cobalt-iron alloy film. The cobalt-iron alloy film consists of about 75-95 wt. % of cobalt, 4.5-20 wt. % of iron and 0.5-5 wt. % of phosphorus and also has peaks at about 43.2, 45.1, 50.4, 65.5, 74.1 and 83.2 2-theta degree (2?) in the X-ray diffraction pattern.Type: ApplicationFiled: October 7, 2016Publication date: April 12, 2018Inventors: Chih-Chi Chen, Chang-Sheng Yeh, Zong-Xun LI
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Publication number: 20180081114Abstract: A light emitting device, an optical module and a manufacturing method thereof are disclosed. According to an example of the disclosure, the light emitting device may comprise an optical waveguide chip, a light emitting chip and a grating between the light emitting chip and the optical waveguide chip. The light emitting chip may emit laser light. The grating may couple the laser light emitted from the active layer into the optical waveguide chip in a way that the laser light is output along a length direction of the optical waveguide chip.Type: ApplicationFiled: April 20, 2017Publication date: March 22, 2018Applicants: Hisense Broadband Multimedia Technologies Co., Ltd., Hisense Broadband Multimedia Technologies, Ltd., Huazhong University of Science and TechnologyInventors: Xun Li, Zekun Lin, Hua Zhang
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Publication number: 20170012689Abstract: The present invention relates to a method and an apparatus for quantizing channel state information (CSI). According to an embodiment of the present invention, a method for quantizing CSI is provided, which can be implemented on a base station side. The method includes: broadcasting antenna configuration of a base station to a user equipment, wherein the antenna configuration includes an antenna port in a vertical direction and an antenna port in a horizontal direction; sending a reference signal (RS) to the user equipment; receiving a vertical precoder corresponding to the antenna port in a vertical direction and a horizontal precoder corresponding to the antenna port in a horizontal direction that are fed back by the user equipment; and based on the received vertical precoder and horizontal precoder, reconstructing a precoder by using a vertical codebook corresponding to the antenna port in a vertical direction and a horizontal codebook corresponding to the antenna port in a horizontal direction.Type: ApplicationFiled: March 6, 2014Publication date: January 12, 2017Applicant: Alcatel LucentInventors: Xun Li, Qinglin Luo, Tao Yang
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Patent number: 9522931Abstract: The present invention is directed to a novel process for the preparation of compounds having inhibitory activity against sodium-dependent glucose transporter (SGLT) being present in the intestine or kidney.Type: GrantFiled: May 18, 2012Date of Patent: December 20, 2016Assignee: Janssen Pharmaceutica NVInventors: Kenneth M. Wells, Ronald K. Russell, Xun Li, Shawn Branum, Derek A. Beauchamp, Sumihiro Nomura, Yosuke Matsumura