Patents by Inventor Fei Ji
Fei Ji 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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Patent number: 12247129Abstract: A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, poly(ethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sarghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.Type: GrantFiled: February 1, 2022Date of Patent: March 11, 2025Assignee: SPECIALTY OPERATIONS FRANCEInventors: Zhiyun Chen, Jean-Christophe Castaing, Peng Fei Ji, Galder Cristobal
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Publication number: 20250075832Abstract: The present invention relates to a mining hose connecting device and method, and belongs to the field of underground hydraulic equipment for coal mines. The mining hose connecting device comprises a joint unit, wherein the joint unit comprises a first joint and a second joint; a first fastening unit, wherein the first fastening unit is arranged symmetrically about a first plane, and the inner diameter of the first fastening unit is respectively in clearance fit with the outer diameters of the first joint and the second joint; and a second fastening unit, comprising a first fastener and a second fastener, wherein the inner diameters of the first fastener and the second fastener are respectively in clearance fit with the outer diameter of the first fastening unit.Type: ApplicationFiled: May 24, 2022Publication date: March 6, 2025Applicant: CCTEG CHONGQI RESEARCH INSTITUTEInventors: Yongjiang Zhang, Lindong Guo, Xusheng Zhao, Zhanjin Lu, Zhenfei Huang, Xianzheng Meng, Chengcheng Li, Huiming Yang, Jianjun Cao, Shuai Li, Fei Ji, Jun Liu, Xingang Niu, Zhonghua Wang, Yongsan Liu, Huaifu Liu, Shanchao Hu
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Publication number: 20240421703Abstract: In one aspect, a bidirectional bridgeless power factor correction (PFC) circuit includes a main circuit, a current detection circuit, and a controller. The main circuit includes an input inductor and is configured to receive an alternating current (AC) voltage from an AC power supply at a first terminal of the input inductor and convert the AC voltage to a direct current (DC) voltage, where a direction of a current flowing through the input inductor during a positive half of the AC voltage is different from a direction of the current flowing through the input inductor during a negative half of the AC voltage. The current detection circuit is configured to generate a detection signal indicating an amount of the current flowing through the input inductor only during a discharge phase of the input inductor. The controller is configured to generate a zero-crossing signal based on the detection signal.Type: ApplicationFiled: October 8, 2021Publication date: December 19, 2024Inventor: Fei JI
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Publication number: 20240396451Abstract: A DC-DC power converter has a ground terminal, an input terminal for receiving an input voltage and an output terminal for providing an output voltage with a target conversion ratio. The power converter includes a coupled inductor having a first winding and a second winding coupled to the output terminal; a first flying capacitor coupled to a first inductor and to the second winding; a second flying capacitor coupled to a second inductor and to the first winding; an input capacitor coupling the input terminal to the ground terminal; an output capacitor coupling the output terminal to the ground terminal; a network of switches; and a driver adapted to drive the network of switches with a sequence of states during a drive period, wherein the sequence of states forms a switching cycle.Type: ApplicationFiled: May 26, 2023Publication date: November 28, 2024Applicant: Renesas Electronics America Inc.Inventors: Fei JI, Shea Lynn PETRICEK
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Patent number: 12101114Abstract: The present invention discloses is a multi-band hyperbolic frequency modulation spread spectrum communication method based on cross sub-band division. In the present solution, multi-band division of different sub-band quantities is performed on an available bandwidth of an underwater acoustic system according to the parity of the serial number of the current spread spectrum period to achieve the aim of cross sub-band division. On this basis, a plurality of divided sub-bands are grouped in pairs; for each group, sub-band selection is performed according to different transmitted data by using a sub-band selection and activation method to realize multi-band parallel transmission. Meanwhile, in each spread spectrum period, an activated sub-band performs frequency modulation on a modulated signal by using rising and falling hyperbolic frequency modulation signals respectively.Type: GrantFiled: October 30, 2020Date of Patent: September 24, 2024Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Hua Yu, Yaqi Zhang, Fei Ji, Fangjiong Chen
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Patent number: 11927282Abstract: An outlet tube includes a first rib, a second rib, and a channel positioned between the first rib and the second rib. The first rib extends from a surface of the tube. The first rib tapers between a first thickness and a second thickness. The second rib extends from the surface of the tube. The second rib tapers between the first thickness and the second thickness. The channel has a first width between adjacent first thicknesses and a second width between adjacent second thicknesses. The first width is greater than the second width.Type: GrantFiled: June 26, 2020Date of Patent: March 12, 2024Assignee: Milwaukee Electric Tool CorporationInventors: Zu Gen Ni, Xue Fei Ji, Guo Xing Zhang, Sullivan Dee, Robert P. Jensen
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Patent number: 11871746Abstract: The present invention provides a method for increasing the growth of a plant by contacting a seed of the plant with a composition comprising a cationic guar having an average molecular weight of between 2,000 Daltons and 90,000 Daltons. The present invention also provides a seed treated with a cationic guar having an average molecular weight of between 2,000 Daltons and 90,000 Daltons.Type: GrantFiled: December 22, 2015Date of Patent: January 16, 2024Assignee: RHODIA OPERATIONSInventors: Peng Fei Ji, Jean-Christophe Castaing, Marie-Pierre Labeau
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Publication number: 20230239002Abstract: The present invention discloses is a multi-band hyperbolic frequency modulation spread spectrum communication method based on cross sub-band division. In the present solution, multi-band division of different sub-band quantities is performed on an available bandwidth of an underwater acoustic system according to the parity of the serial number of the current spread spectrum period to achieve the aim of cross sub-band division. On this basis, a plurality of divided sub-bands are grouped in pairs; for each group, sub-band selection is performed according to different transmitted data by using a sub-band selection and activation method to realize multi-band parallel transmission. Meanwhile, in each spread spectrum period, an activated sub-band performs frequency modulation on a modulated signal by using rising and falling hyperbolic frequency modulation signals respectively.Type: ApplicationFiled: October 30, 2020Publication date: July 27, 2023Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Hua YU, Yaqi ZHANG, Fei JI, Fangjiong CHEN
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Patent number: 11480510Abstract: Provided are a method and device for dynamically monitoring suspended matter based on an annular interleaving array. An annular multi-band interleaving array used thereby can be combined with the Doppler effect to on-line measure the concentration and linearity distribution of the suspended matter and a three-dimensional flow velocity of suspended water, thus realizing real-time monitoring of water quality. A frequency range needing to be measured is divided into different frequency bands, and different transceiving transducer arrays are used to transmit and receive measurement signals, so that the concentration and linearity distribution of various suspended matter with an extremely large linearity range can be obtained through one measurement.Type: GrantFiled: November 20, 2017Date of Patent: October 25, 2022Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Gengxin Ning, Qiuyan Ning, Bowen Wang, Jun Zhang, Yizhi Feng, Fei Ji
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Publication number: 20220325830Abstract: An outlet tube includes a first rib, a second rib, and a channel positioned between the first rib and the second rib. The first rib extends from a surface of the tube. The first rib tapers between a first thickness and a second thickness. The second rib extends from the surface of the tube. The second rib tapers between the first thickness and the second thickness. The channel has a first width between adjacent first thicknesses and a second width between adjacent second thicknesses. The first width is greater than the second width.Type: ApplicationFiled: June 26, 2020Publication date: October 13, 2022Inventors: Zu Gen NI, Xue Fei JI, Guo Xing ZHANG, Sullivan DEE, Robert P. JENSEN
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Patent number: 11463178Abstract: Disclosed by the present invention is a sub-band selection activation-based multi-band hyperbolic frequency modulation spread spectrum underwater acoustic communication method. The present invention discloses: dividing the available bandwidth of an underwater acoustic system into a plurality of sub-bands, performing hyperbolic frequency modulation on each of the sub-bands respectively, and performing spread spectrum modulation on the plurality of sub-bands within the same frequency modulation period, thus implementing multi-band parallel transmission. Hence, within each frequency modulation period, the divided plurality of sub-bands is grouped, and each sub-band group activates different sub-bands for transmission according to different options for transmitting data. Compared to other underwater acoustic hyperbolic frequency modulation communication solutions, the present invention further improves the frequency band utilization of the system, and the energy efficiency is also improved.Type: GrantFiled: November 19, 2018Date of Patent: October 4, 2022Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Hua Yu, Yongjin Zhou, Fei Ji, Fangjiong Chen
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Patent number: 11441105Abstract: Provided is the use of a lanthanide metal complex as a bleaching catalyst. In particular, the lanthanide metal complex comprises a ligand which is an aromatic compound having at least one electron withdrawing substituent and at least one nucleophilic group. Provided is also a composition containing the lanthanide metal complex.Type: GrantFiled: December 15, 2017Date of Patent: September 13, 2022Inventors: Bing Hong, Alexander Lerch, Stéphane Streiff, Peng Fei Ji, Armin T. Liebens
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Publication number: 20220154030Abstract: A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, poly(ethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sarghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.Type: ApplicationFiled: February 1, 2022Publication date: May 19, 2022Applicant: RHODIA OPERATIONSInventors: Zhiyun Chen, Jean-Christophe Castaing, Peng Fei Ji, Galder Cristobal
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Patent number: 11140009Abstract: The invention provides a frequency offset estimation method for an OFDM-IM system. The method includes: S1. performing preliminary frequency offset compensation on a received signal subjected to non-uniform frequency offset by using a two-step method of: (1) resampling and down conversion; and (2) unified compensation for residual frequency offset ?, wherein in the step (2), a sum of energy of null sub-carriers is used as a cost function, an initial estimation value of ? is obtained by one-dimensional search, and the preliminary compensation is performed; S2. estimating positions of non-activated sub-carriers in the OFDM-IM system by using the signal subjected to the preliminary compensation; and S3. assigning certain weights to the estimated sub-carriers, adding energy of the estimated sub-carriers into the cost function according to different weights, obtaining a final estimation value of ? by the one-dimensional search performed on ?, and performing secondary compensation.Type: GrantFiled: October 30, 2018Date of Patent: October 5, 2021Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Fangjiong Chen, Zhibin Yang, Jing Liu, Fei Ji, Hua Yu
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Publication number: 20210179975Abstract: Provided is the use of a lanthanide metal complex as a bleaching catalyst. In particular, the lanthanide metal complex comprises a ligand which is an aromatic compound having at least one electron withdrawing substituent and at least one nucleophilic group. Provided is also a composition containing the lanthanide metal complex.Type: ApplicationFiled: December 15, 2017Publication date: June 17, 2021Inventors: Bing HONG, Alexander LERCH, Stéphane STREIFF, Peng Fei JI, Armin T. LIEBENS
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Patent number: 10985955Abstract: The invention provides a method for automatically identifying a modulation mode for a digital communication signal. The method comprises the following steps of: S1: preprocessing a training digital modulation signal; S2: extracting a characteristic value of the training digital modulation signal; S3: constructing a strong classifier by Bagging learning; and S4: preprocessing a modulation signal to be tested and extracting a corresponding characteristic parameter, and then inputting the characteristic parameter into the strong classifier in the S3 to classify and identify the modulation signal. According to the method, by processing all characteristic values in parallel, a success rate of identification has little to do with an identification performance of a single characteristic parameter and is mainly related to an overall performance, so that the identification to the modulation mode has the advantages of fast identification speed and high success rate of identification.Type: GrantFiled: November 30, 2017Date of Patent: April 20, 2021Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Fangjiong Chen, Wensong Zhang, Zeng Hu, Fei Ji, Hua Yu
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Patent number: 10972141Abstract: A method for estimating arrival time based on noise cancellation includes transmitting, with a transmit terminal, an ultra-wideband pulse sequence; performing power sampling on a received ultra-wideband signal; averaging a power sampling sequence; carrying out a calculation to obtain a noise mean vector; using a sum-of-rank method to obtain a rank of a power mean column vector; setting a decision threshold; and performing time-of-arrival (TOA) estimation.Type: GrantFiled: October 16, 2018Date of Patent: April 6, 2021Inventors: Yizhi Feng, Pingping Yang, Jun Zhang, Gengxin Ning, Fei Ji
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Publication number: 20210044312Abstract: A method for estimating arrival time based on noise cancellation, includes transmitting, with a transmit terminal, an ultra-wideband pulse sequence; performing power sampling on a received ultra-wideband signal; averaging a power sampling sequence; carrying out a calculation to obtain a noise mean vector; using a sum-of-rank method to obtain a rank of a power mean column vector; setting a decision threshold; and performing time-of-arrival (TOA) estimation.Type: ApplicationFiled: October 16, 2018Publication date: February 11, 2021Inventors: Yizhi Feng, Pingping Yang, Jun Zhang, Gengxin Ning, Fei Ji
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Publication number: 20210044464Abstract: The invention provides a frequency offset estimation method for an OFDM-IM system. The method includes: S1. performing preliminary frequency offset compensation on a received signal subjected to non-uniform frequency offset by using a two-step method of: (1) resampling and down conversion; and (2) unified compensation for residual frequency offset ?, wherein in the step (2), a sum of energy of null sub-carriers is used as a cost function, an initial estimation value of ? is obtained by one-dimensional search, and the preliminary compensation is performed; S2. estimating positions of non-activated sub-carriers in the OFDM-IM system by using the signal subjected to the preliminary compensation; and S3. assigning certain weights to the estimated sub-carriers, adding energy of the estimated sub-carriers into the cost function according to different weights, obtaining a final estimation value of ? by the one-dimensional search performed on ?, and performing secondary compensation.Type: ApplicationFiled: October 30, 2018Publication date: February 11, 2021Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGYInventors: Fangjiong CHEN, Zhibin YANG, Jing LIU, Fei JI, Hua YU
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Publication number: 20200369906Abstract: A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, poly(ethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sarghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.Type: ApplicationFiled: July 15, 2020Publication date: November 26, 2020Applicant: RHODIA OPERATIONSInventors: Zhiyun CHEN, Jean-Christophe CASTAING, Peng Fei JI, Galder CRISTOBAL