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1.发明公开公开(公告)号：US20240364247A1
公开(公告)日：2024-10-31
申请号：US18624043
申请日：2024-04-01
发明人： Mengting YE , Yanfei CAO , Zhichen LIN , Zhiqiang WANG , Tingna SHI , Changliang XIA
CPC分类号： H02P21/18 , H02P21/0017 , H02P21/22 , H02P2207/05
摘要： A direct locating method for calculating a position of a permanent magnet synchronous motor is provided. The direct locating method performed by a processor includes: three-phase stator currents of the permanent magnet synchronous motor are converted by coordinate to obtain the stator currents in the αβ two-phase stationary coordinate system, and the initial position region is determined. The stator currents in dq two-phase synchronous rotating coordinate system are obtained by coordinate conversion. The stator current cost model is established. Then the d-axis stator current is inputted into the cost model and the position is outputted, and the final estimated position is determined to realize the direct locating of the permanent magnet synchronous motor's position.
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2.发明公开公开(公告)号：US20240038074A1
公开(公告)日：2024-02-01
申请号：US18352669
申请日：2023-07-14
发明人： Yong He , Xiaoyue DU , Liyuan ZHENG , Liwen HE , Shuiguang DENG , Chongde SUN
CPC分类号： G08G5/003 , G06V20/17 , G06V20/194
摘要： The present disclosure provides a method and system for determining an optimal flight height of an unmanned aerial vehicle (UAV), an electronic device, and a medium. The method includes: obtaining a multi-band crop spectral image of an experimental area in a preset scenario; performing data processing on the multi-band crop spectral image, to obtain multi-spectral orthographies of a plurality of sample plots; calculating a ground resolution of the multi-spectral orthography of each sample plot, simulating and determining a multi-band crop spectral image of each sample plot at a different flight height by a nearest neighbor interpolation method based on the ground resolution of the multi-spectral orthography of each sample plot; and for the multi-band crop spectral image of each sample plot at the different flight height, determining an optimal flight height corresponding to each sample plot by a hypothetical test method.
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公开(公告)号：US11811339B2
公开(公告)日：2023-11-07
申请号：US17794986
申请日：2021-08-03
发明人： Tingna Shi , Chen Li , Yan Yan , Changliang Xia
IPC分类号： H02P21/00 , H02P21/18 , H02P21/22 , H02P25/022 , H02P27/12
CPC分类号： H02P21/0085 , H02P21/0017 , H02P21/18 , H02P21/22 , H02P25/022 , H02P27/12
摘要： The present disclosure provides a predictive control method of current increment for a permanent magnet synchronous motor includes: substituting a mathematical expression of a stator voltage during one control period into a continuous time domain current model to obtain a discrete current prediction model and a predicted current at the next time point; obtaining a predicted current increment from a current increment prediction model by subtracting a predictive current at a present time point from a predictive current at a next time point; establishing a cost function according to a preset reference current increment and the predicted current increment; obtaining an optimal voltage increment by minimizing the cost function; superposing the optimal voltage increment on a stator voltage of a present control period to obtain an optimal stator voltage of a next control period for controlling control the permanent magnet synchronous motor.
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公开(公告)号：US11750127B2
公开(公告)日：2023-09-05
申请号：US17793935
申请日：2021-08-03
发明人： Zhichen Lin , Tingna Shi , Zhen Zhang , Changliang Xia
IPC分类号： H02P21/14 , H02P21/22 , H02P21/00 , H02P25/022 , H02P27/08
CPC分类号： H02P21/14 , H02P21/0003 , H02P21/22 , H02P25/022 , H02P27/08
摘要： The invention discloses a control method for balancing scaling errors of multiple current sensors for PMSM. An impedance network is set between a direct current power supply and a three-phase inverter connected to a PMSM to avoid positive and negative poles of the direct current power supply being short-circuited under actions of shoot-through vectors. Under actions of two shoot-through vectors in a PWM cycle, three-phase current sensors are used to respectively sample the sum of currents in each branch of three-phase output branches of the three-phase inverter and a branch of the same bridge arm of the three-phase inverter, according to the sampled currents, operating to obtain the relationship between the scaling error coefficients of the three-phase current sensors. Then, correction coefficients are calculated. The correction of the scaling errors of the current sensors is implemented using correction coefficient feedback control.
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公开(公告)号：US20230141130A1
公开(公告)日：2023-05-11
申请号：US17577117
申请日：2022-01-17
发明人： Zhiqiang Hou , Ziqi Chai , Xipan Shu , Luqin Luan , Shiguo Chen , Xingqian Ye
摘要： The present disclosure belongs to the technical field of food processing and provides a phenolic stabilized fruit juice and a preparation method thereof. In the present disclosure, plant RG-I pectin polysaccharide is extracted through an ultra-high pressure technology, and then ultra-high pressure technology is used to promote the interaction of pectin polysaccharides and phenols in fruit juice, improve the stability of phenolic substances in fruit juice, and can improve the bioavailability of phenolic substances in fruit juice. The method of the present disclosure improves the added value of products and solves the problem of low bioavailability of phenolic substances in juice.
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公开(公告)号：US11519656B2
公开(公告)日：2022-12-06
申请号：US16817227
申请日：2020-03-12
发明人： Yong Cai , Shuo Liu , Zhijian Yang , Kaiyou Jiang , Wanglin Lin , Yu Zhang , Lei Chen , Zhiyong Sun , Fan Ding , Bo Zhang , Kai Qiao , Hao Wang
摘要： A high-precision control system and method for shipborne cryogenic flash freezing of an aquatic product using liquid nitrogen is described. The system may include a main control system, a display unit, a liquid nitrogen supply system, a valve control unit, an acquisition unit, and a power unit. A flash freezing process is divided into four stages: a precooling stage, a flash freezing stage, a deep freezing stage, and a thermal insulation stage. Different cooling rates and flash freezing times are used for different stages, where a cooling rate is used in the flash freezing stage is the highest, a cooling rate used in the deep freezing stage is next, a cooling rate used in the precooling stage is the lowest, and an ambient temperature in a device is kept stable in the thermal insulation stage.
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7.发明公开公开(公告)号：US20240364246A1
公开(公告)日：2024-10-31
申请号：US18586554
申请日：2024-02-26
发明人： Changliang XIA , Mengting YE , Chen LI , Zhanqing ZHOU , Yan YAN , Tingna SHI
IPC分类号： H02P21/18
CPC分类号： H02P21/18
摘要： A method for quickly determining the rotor position of a permanent magnet motor using the N-division approach is provided. The method involves converting the motor's three-phase stator current coordinates into the dq two-phase synchronous rotation coordinate system and identifying the initial rotor position area. By establishing a stator current cost model and utilizing the d-axis stator current, the initial rotor position can be obtained. Subsequently, the N-division approach is employed for iterative optimization to obtain the estimated rotor position and the final position region, leading to a rapid estimation of the permanent magnet motor's rotor position. This method incorporates the finite set model predictive control concept into a phase-locked loop based on stator current, eliminating the need for additional rotor position polarity judgment and invalid rotor position control variables.
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8.发明公开公开(公告)号：US20240270824A1
公开(公告)日：2024-08-15
申请号：US18405405
申请日：2024-01-05
申请人： Zhejiang University , Ningbo Innovation Center, Zhejiang University , Shanghai Institute for Advanced Study of ZJU
发明人： Wei CHEN , Lianghua XIE , Yunhe MENG , Kaihao YOU
IPC分类号： C07K14/805 , C12N1/20 , C12N15/70 , C12R1/19
CPC分类号： C07K14/805 , C12N1/205 , C12N15/70 , C12N2500/34 , C12R2001/19
摘要： The present disclosure provides a gene expression cassette encoding hemoglobin (Hb) and use thereof, and relates to the technical field of genetic engineering. In the present disclosure, a recombinant Escherichia coli strain with signal peptides Pel B, Pho A, and Omp A inserted under same conditions has an expression level of leghemoglobin (LegH) increased by 3.01, 1.25, and 1.22 times, respectively, compared with an original LegH expressing strain. The present disclosure provides signal peptides that can increase the expression level of the LegH, and provide a new idea for research and application of improving the expression level of the LegH.
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9.发明公开公开(公告)号：US20230285891A1
公开(公告)日：2023-09-14
申请号：US18120379
申请日：2023-03-11
发明人： CHENGHANG ZHENG , XIANG GAO , CHANG LIU , CAN ZHOU , YONGXIN ZHANG , YOU ZHANG , YANG ZHANG , QINWU LI , WEIGUO WENG , WEIHONG WU , XIAO ZHANG , TAO WANG
CPC分类号： B01D53/1412 , B01D53/1406 , B01D53/1475 , B01D53/1425 , B01D53/185 , B01D15/361 , B01D47/14 , G05B13/042 , B01D2258/0283 , B01D2252/103 , B01D2252/504 , B01D2252/20421 , B01D2252/20426 , B01D2252/20431
摘要： The invention relates to a low-cost and high-efficiency absorption-desorption decoupling method for contaminant-CO2 synergistic capture. According to the method, an optimization model of absorption-desorption decoupling control for contaminant-CO2 synergistic capture under different working conditions is built, the optimization objective is to obtain high-purity liquid contaminants and CO2 at low cost and efficiently, and an adaptive penalty function is constructed to transform a solution of a constrained optimization problem into that of an unconstrained optimization problem, thereby controlling parameters in a real-time, precise and stable manner. Moreover, supported by means of flue gas pre-scrubbing and cooling, multi-stage intercooling and column-top demisting, the method of the present invention achieves efficient capture of contaminants and CO2. According to the invention, the absorption process is decoupled from the desorption process, and the coordinated control of temperature-pH-liquid-gas ratio and rich liquid flow-desorption temperature in all cycles is carried out to realize the synergistic capture-regeneration-concentration of contaminants and CO2 with high efficiency and low energy consumption, thereby reducing the high cost of the traditional method where a flue gas cleaning system and a carbon capture system operate separately.
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公开(公告)号：US20230116999A1
公开(公告)日：2023-04-20
申请号：US17967983
申请日：2022-10-18
申请人： ZHEJIANG UNIVERSITY , HAINAN INSTITUTE OF ZHEJIANG UNIVERSITY , HUZHOU PLANT PROTECTION QUARANTINE AND FERTILIZER MANAGEMENT STATION
发明人： Zengrong ZHU , Jin LV , Xin Yuan , Wenwu Zhou , Ping Qian , Wendi Wu
IPC分类号： A01K47/06
摘要： The present disclosure relates to the field of artificial honeycombs, in particular to an artificial nest for solitary bees and an application method of the artificial nest. The artificial nest comprises a main enclosure tube, hanging rings, a plurality of trapping hollow tubes and tightening mechanisms used for clamping the trapping hollow tubes. The hanging rings are arranged at an outer sidewall of the main enclosure tube. The tightening mechanisms are annularly arranged at an inner sidewall of the main enclosure tube, and the trapping hollow tubes are fixed in a ring of each tightening mechanism in an axis direction of the main enclosure tube. Each tightening mechanism comprises a connecting steel wire and fastening springs. The sidewall of the main enclosure tube is provided with fixing holes for fixing the tightening mechanisms.
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