Patents by Inventor Zheng Ma
Zheng Ma 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: 20220085756Abstract: This application discloses an inverter circuit for an inverter such as a photovoltaic inverter. Also disclosed are inverters and photovoltaic power systems including such inverter circuits. The inverter circuit is based on a HERIC topology, and in the inverter circuit a third capacitor and a fourth capacitor are bridge-connected between a bus and a first longitudinal bridge and between the bus and a second longitudinal bridge respectively. In this way, when the inverter circuit goes from a starting phase to a freewheeling phase, the third capacitor and the fourth capacitor can stabilize a voltage fluctuation caused by different turn-off speeds of the switching transistors in the HERIC topology, to prevent resonance caused by the voltage fluctuations.Type: ApplicationFiled: November 29, 2021Publication date: March 17, 2022Applicant: Huawei Digital Power Technologies Co., Ltd.Inventors: Dechen WANG, Peng SHI, Zheng MA
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Patent number: 11272664Abstract: A device for conveying and feeding wet material for a cross-flow hot air combine harvester, the device consisting of a hot air pumping part and a material conveying part. The hot air pumping part uses an air suction pump (4) to pump a flow of hot waste air from an engine radiator (1) of the combine harvester by means of an air suction pipeline (3) so as to provide hot air flow for the material conveying and feeding device. The material conveying part consists of a chain harrow-type conveying groove structure (A) and a cross-flow air chamber structure (B), wherein the chain harrow-type conveying groove structure (A) is used for forcibly conveying and feeding a material; and the cross-flow air chamber structure (B) uses hot air to dry the material, blows to assist in feeding the material, and uses a cross-flow air wheel (14) to forcibly feed the material.Type: GrantFiled: December 19, 2017Date of Patent: March 15, 2022Assignee: Jiangsu UniversityInventors: Yaoming Li, Zheng Ma, Lizhang Xu, Zhong Tang, Jianting Wang, Min Han
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Publication number: 20220057231Abstract: Embodiments of the present description provide methods and apparatuses for detecting map calibration errors. In one aspect, a method includes: acquiring a map including at least one map element, determining at least one of feature information of the at least one map element or a navigation line according to the map, and determining whether a map element is calibrated wrongly according to the at least one of the feature information or the navigation line.Type: ApplicationFiled: November 8, 2021Publication date: February 24, 2022Inventors: Zheng MA, Zeyu WANG, Lei DU, Chunxiao LIU, Jianping SHI
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Publication number: 20220032929Abstract: The present disclosure provides a fault-tolerant tracking control method of a four-wheel distributed electric drive autonomous vehicle. The method depends on a typical four-wheel distributed electric drive vehicle structure, comprising: first, realizing real-time acquisition of an output torque and a fault coefficient of a hub motor through each vehicle-mounted sensor and each parameter observer; then determining whether the vehicle power system enters a fault state, and if the hub motor is in the fault state, entering a set fault-tolerant tracking link; and judging the fault mode of the current vehicle, using different control logics for different fault modes, and finally realizing fault-tolerant control or emergency risk avoiding of the vehicle.Type: ApplicationFiled: May 13, 2021Publication date: February 3, 2022Inventors: Weida WANG, Chao YANG, Yuhang ZHANG, Wei WANG, Zheng MA, Changle XIANG
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Publication number: 20220036587Abstract: A calibration method, an electronic device, and a storage medium are provided. The calibration method includes the following. A sample image is acquired with an image acquisition device. Initial pixel coordinates of multiple sample reference objects in the sample image in an image coordinate system are determined based on the sample image. Straight-line fitting is performed on sample reference objects on a same straight line based on the determined initial pixel coordinates of the sample reference objects in the image coordinate system, and the initial pixel coordinates of the sample reference objects involved in straight-line fitting are corrected based on fitted straight lines to obtain corrected pixel coordinates. A homography matrix of the image acquisition device is determined based on world coordinates of the multiple sample reference objects in the sample image in a world coordinate system and the obtained corrected pixel coordinates.Type: ApplicationFiled: October 15, 2021Publication date: February 3, 2022Applicant: Sensetime Group LimitedInventors: Zheng MA, Rui HUANG, Guohang YAN, Jianping SHI
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Patent number: 11201549Abstract: A related power conversion circuit includes a three-level switch circuit and a resonant circuit, and a control method of the related power conversion circuit includes: controlling all transistors in the three-level switch circuit to be turned off, where a body diode connected in parallel to a transistor S1, a body diode connected in parallel to a transistor Q1, and a body diode connected in parallel to a transistor Q2 are all turned on based on a current freewheeling function of the resonant circuit; controlling the S1 to be turned on, to set up a first working state of the power conversion circuit; and after the first working state lasts for a time length T1, controlling the Q1 and the Q2 to be turned on.Type: GrantFiled: July 31, 2020Date of Patent: December 14, 2021Assignee: Huawei Technologies Co., Ltd.Inventors: Yanzhong Zhang, Chunyang Liu, Zheng Ma
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Publication number: 20210383149Abstract: A method for identifying an individual of an oplegnathus punctatus based on a convolutional neural network is provided. Target initial positioning involves three continuous convolutional layers and an average pooling layer. A region of feature interest point is obtained, a hyperparameter candidate box is set to obtain a region, thereby obtaining an approximate position of a target object. II_Net backbone convolutional neural network includes six convolutional layers and four pooling layers, which includes a LeakyReLU activation function used as an activation function of the first convolutional layer, convolutional network layers of Alexnet and parameter data, and a maximum pooling layer of an overlapped pooling structure. Fully connected layers use a genetic algorithm to improve data transmission between layers. With the established model, identification of the individual of the oplegnathus punctatus is performed by using test data.Type: ApplicationFiled: June 8, 2021Publication date: December 9, 2021Inventors: Jun Yue, Beibei Li, Shixiang Jia, Zhenbo Li, Qing Wang, Zheng Ma, Guangjie Kou, Tao Yao, Zhenzhong Li
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Publication number: 20210329842Abstract: A threshing device with two-way pull wires and adjustable threshing clearance includes a tensioning mechanism, and several grid bars in clearance fit with side plates, wherein the tensioning mechanism is mounted on the several grid bars so that the grid bars can move in radial and tangential directions in the clearance; the tensioning mechanism includes a tangential tensioning device and a radial tensioning device, wherein the radial tensioning device is mounted in the radial direction of any one of the grid bars, so that the grid bars can move in the radial direction in the clearance; the tangential tensioning device is mounted in series in the tangential direction of the grid bars, so that the grid bars can move in the tangential direction in the clearance. The present invention further provides a combined harvester, which includes the threshing device with two-way pull wires and adjustable threshing clearance.Type: ApplicationFiled: March 26, 2019Publication date: October 28, 2021Inventors: Zheng MA, Min HAN, Yaoming LI, Lizhang XU, Kechao MA, Zhong TANG, En LU, Zhenwei LIANG
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Patent number: 11159089Abstract: A resonant converter includes: an input power supply, a bleeder circuit, a multi-level switching network, a resonant unit, and a transformer. The input power supply is connected to the bleeder circuit, the multi-level switching network is connected to the bleeder circuit, a clamping middle point of the multi-level switching network is connected to a middle point of the bleeder circuit; one end of the resonant unit is connected to the output terminal of the multi-level switching network, and the other end of the resonant unit is connected to one end of a primary side of the transformer; and the multi-level switching network instructs the output terminal of the multi-level switching network to output a square wave voltage with different amplitudes, to serve as an input voltage of the resonant unit, where the input voltage is used to adjust a gain of the resonant converter.Type: GrantFiled: June 24, 2020Date of Patent: October 26, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yanzhong Zhang, Zheng Ma, Lei Shi, Dianbo Fu
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Publication number: 20210324737Abstract: The present invention discloses an intelligent detection and recognition system and method for a coal-rock interface of a mine. The intelligent detection and recognition system mainly includes an intelligent lifting support fastened to the top of a shearer, a non-contact radar antenna disposed at the top of the intelligent lifting support, and an operating terminal with which the radar antenna wirelessly conducts information transmission. In an operating state, a radiation direction of the radar antenna is perpendicular to the surface of a to-be-detected coal seam, and the operating terminal is configured to acquire radar data of the to-be-detected coal seam collected by the radar antenna, and draw and display a coal-rock horizon occurrence curve according to the radar data. The present invention can not only improve the detection accuracy, but also adapt to a working environment that suddenly changes on a fully mechanized mining face.Type: ApplicationFiled: June 10, 2020Publication date: October 21, 2021Inventors: Xianlei XU, Suping PENG, Zheng MA, Biao GUO, Tao SUN
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Publication number: 20210239564Abstract: An assembly quality detection device and a method for a wind screen cleaning system based on streamline pattern, includes a main body of a test bench and a detection system. The main body of the test bench includes a test bench rack and a cleaning centrifugal fan; the inside of the test bench rack is provided with a cleaning space. The detection system includes a smoke generation and transmission device, a two-degree-of-freedom smoke fixed-point release mechanism, a high-speed image acquisition system and a control system. A fixed base is installed on the upper end of the outlet of the cleaning centrifugal fan, a linear moving guide rail device is installed on the fixed base, the linear moving guide rail device is equipped with a moving slider, the moving slider is installed with a rotating mechanism, the rotating mechanism output end is provided with a smoke releasing duct, the smoke releasing duct is communicated with the smoke generation and transmission device.Type: ApplicationFiled: September 7, 2018Publication date: August 5, 2021Inventors: Zheng MA, Min HAN, Yaoming LI, Lizhang XU, Xinzhong WANG, Zhong TANG, Hongxin LI
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Patent number: 11039573Abstract: An automatic uniform distribution apparatus for the threshed material from the combine harvester comprises a tangential flow threshing and separating device, a shaking plate threshed material detecting device, a shaking plate, a shaking plate flow guiding mechanism, an axial flow threshing and separating device, a chaff screw conveyor, a return plate, a return plate flow guiding mechanism, a return plate threshed material detecting device, a vibrating sieve, and an on-line detection controller. Force sensors are provided at lateral positions below discharge ports of the shaking plate and the return plate to measure flow rates of the threshed material in lateral regions of the shaking plate and the return plate.Type: GrantFiled: July 13, 2018Date of Patent: June 22, 2021Assignee: Jiangsu UniversityInventors: Lizhang Xu, Ying Zhou, Yaoming Li, Zhong Tang, Zheng Ma
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Publication number: 20210137008Abstract: A device for conveying and feeding wet material for a cross-flow hot air combine harvester, the device consisting of a hot air pumping part and a material conveying part. The hot air pumping part uses an air suction pump (4) to pump a flow of hot waste air from an engine radiator (1) of the combine harvester by means of an air suction pipeline (3) so as to provide hot air flow for the material conveying and feeding device. The material conveying part consists of a chain harrow-type conveying groove structure (A) and a cross-flow air chamber structure (B), wherein the chain harrow-type conveying groove structure (A) is located at an upper part of the cross-flow air chamber structure (B) and is used for forcibly conveying and feeding a material; and the cross-flow air chamber structure (B) uses hot air to dry the material, blows to assist in feeding the material, and uses a cross-flow air wheel (14) to forcibly feed the material.Type: ApplicationFiled: December 19, 2017Publication date: May 13, 2021Inventors: Yaoming Li, Zheng Ma, Lizhang Xu, Zhong Tang, Jianting Wang, Min Han
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Patent number: 10978957Abstract: A resonant converter circuit comprises a multi-level inverter circuit placed before a resonant unit, and the multi-level inverter circuit can reduce a voltage to be input to the resonant unit. The reduced input voltage of the resonant unit results in a drop in an output voltage of the entire resonant converter circuit. In this process, the final output voltage is adjusted by adjusting the input voltage of the resonant unit, with no need to substantially adjust a switching frequency of the resonant converter circuit.Type: GrantFiled: June 18, 2020Date of Patent: April 13, 2021Assignee: Huawei Technologies Co., Ltd.Inventors: Yanzhong Zhang, Zheng Ma, Boning Huang, Grover Victor Torrico-Bascopé, Dianbo Fu
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Patent number: 10957313Abstract: Techniques for performing command processing are described. A system receives, from a device, input data corresponding to a command. The input data may originate as audio data, as text data, or as other data. The system determines NLU processing results corresponding to the input data. The NLU processing results may be associated with multiple speechlets. The system also determines NLU confidences for the NLU processing results for each speechlet. The system sends NLU processing results and an indication to provide potential results to a portion of the multiple speechlets, and receives potential results from the portion of the speechlets. The system also receives indications whether the speechlets need to be re-called if the speechlets are selected to execute with respect to the command. The system ranks the portion of the speechlets based at least in part on the NLU processing results as well as the potential results provided by the portion of the speechlets.Type: GrantFiled: November 22, 2017Date of Patent: March 23, 2021Assignee: Amazon Technologies, Inc.Inventors: Ruhi Sarikaya, Zheng Ma, Simon Peter Reavely, Kerry Hammil, Huinan Ren, Bradford Jason Snow, Jerrin Thomas Elanjikal
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Publication number: 20210062916Abstract: A piston assembly for an internal combustion engine of a motor includes a piston head having an outer diameter surface spaced a first distance from the longitudinal axis and an annular surface spaced a second distance from the longitudinal axis, with the second distance being less than the first distance. Upper and lower walls extend between the annular surface and the outer diameter surface so as to define an annular groove in the outer diameter surface. A piston ring is received within the annular groove and includes an inner diameter surface facing the annular surface of the piston head. The inner diameter surface of the piston ring and the annular surface of the piston head cooperate with one another to define a plurality of pockets angularly spaced from one another about the longitudinal axis and configured to receive oil.Type: ApplicationFiled: August 29, 2019Publication date: March 4, 2021Inventors: Balakrishna Chinta, John B. Fisher, Zheng Ma
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Publication number: 20210015047Abstract: An automatic uniform distribution apparatus for the threshed material from the combine harvester comprises a tangential flow threshing and separating device, a shaking plate threshed material detecting device, a shaking plate, a shaking plate flow guiding mechanism, an axial flow threshing and separating device, a chaff screw conveyor, a return plate, a return plate flow guiding mechanism, a return plate threshed material detecting device, a vibrating sieve, and an on-line detection controller. Force sensors are provided at lateral positions below discharge ports of the shaking plate and the return plate to measure flow rates of the threshed material in lateral regions of the shaking plate and the return plate.Type: ApplicationFiled: September 26, 2019Publication date: January 21, 2021Applicant: Jiangsu UniversityInventors: Lizhang XU, Ying ZHOU, Yaoming LI, Zhong TANG, Zheng MA
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Publication number: 20200366211Abstract: A related power conversion circuit includes a three-level switch circuit and a resonant circuit, and a control method of the related power conversion circuit includes: controlling all transistors in the three-level switch circuit to be turned off, where a body diode connected in parallel to a transistor S1, a body diode connected in parallel to a transistor Q1, and a body diode connected in parallel to a transistor Q2 are all turned on based on a current freewheeling function of the resonant circuit; controlling the S1 to be turned on, to set up a first working state of the power conversion circuit; and after the first working state lasts for a time length T1, controlling the Q1 and the Q2 to be turned on.Type: ApplicationFiled: July 31, 2020Publication date: November 19, 2020Inventors: Yanzhong ZHANG, Chunyang LIU, Zheng MA
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Publication number: 20200321878Abstract: A resonant converter circuit comprises a multi-level inverter circuit placed before a resonant unit, and the multi-level inverter circuit can reduce a voltage to be input to the resonant unit. The reduced input voltage of the resonant unit results in a drop in an output voltage of the entire resonant converter circuit. In this process, the final output voltage is adjusted by adjusting the input voltage of the resonant unit, with no need to substantially adjust a switching frequency of the resonant converter circuit.Type: ApplicationFiled: June 18, 2020Publication date: October 8, 2020Inventors: Yanzhong ZHANG, Zheng MA, Boning HUANG, Grover Victor TORRICO-BASCOPÉ, Dianbo FU
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Publication number: 20200321879Abstract: A resonant converter includes: an input power supply, a bleeder circuit, a multi-level switching network, a resonant unit, and a transformer. The input power supply is connected to the bleeder circuit, the multi-level switching network is connected to the bleeder circuit, a clamping middle point of the multi-level switching network is connected to a middle point of the bleeder circuit; one end of the resonant unit is connected to the output terminal of the multi-level switching network, and the other end of the resonant unit is connected to one end of a primary side of the transformer; and the multi-level switching network instructs the output terminal of the multi-level switching network to output a square wave voltage with different amplitudes, to serve as an input voltage of the resonant unit, where the input voltage is used to adjust a gain of the resonant converter.Type: ApplicationFiled: June 24, 2020Publication date: October 8, 2020Inventors: Yanzhong ZHANG, Zheng MA, Lei SHI, Dianbo FU