Patents by Inventor Wenjun Xu
Wenjun 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: 20240386071Abstract: An amplitude preserving method and system based on symmetry of generalized Hamilton operators are provided. This method involves determining the dimensions of a decomposition equation based on up-going and down-going one-way wave equations. Additionally, an amplitude preserving form and boundary conditions are established for both up-going and down-going wave equations with varying dimensions. The traditional one-way wave processing procedure is then adjusted by a modified source function and initial boundary conditions until a one-way wave field recursive equation with an amplitude preserving condition is satisfied. Finally, a modified one-way wave program is used to obtain an amplitude preserving wave field, which is then compared to the results of a finite difference wave field or an analytical solution wave field for verification.Type: ApplicationFiled: May 16, 2024Publication date: November 21, 2024Applicant: Shanghai Institute of Technical Physics, CAS.Inventors: Wenjun XU, Shengli SUN, Gaorui LIU
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Patent number: 12140584Abstract: A method for evaluating a production potential for volume fracturing of a shale oil reservoir and determining a soaking time is discloses. The method may comprise: obtaining a core column; performing a saturated oil treatment on the core column; obtaining an initial fracture porosity parameter of the saturated oil-treated core column; soaking the core column after a CT scanning into a fracturing fluid to test the core mass increase amount at different immersion durations; obtaining the fracture porosity increase amount of the core column at different soaking times, and calculating a weight of newly added fracture porosity-fillable fracturing fluid; generating a curve of the core mass increase amount and a curve of the weight of the newly added fracture porosity-fillable fracturing fluid at different immersion durations; comparing a mass increase amount per volume unit of a core, and ranking a e mass increase amount per volume unit of the core to determine the production increase potential.Type: GrantFiled: June 5, 2024Date of Patent: November 12, 2024Assignee: YANGTZE UNIVERSITYInventors: Wenjun Xu, Feng Jiang, Jianpeng Zhang, Lei Wang, Yuanai Liao
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Patent number: 12088438Abstract: Disclosed is a low-complexity linear equalization method for an Orthogonal Time Frequency Space (OTFS) system. The method may include: receiving a time domain signal passing through a linear time-varying (LTV) channel; sampling the time domain signal to obtain a sampled signal; demodulating the sampled signal to obtain a demodulated signal; performing a Symplectic Finite Fourier Transform (SFFT) on the demodulated signal to obtain a sampled delay-Doppler domain signal; determining an effective channel matrix in a delay-Doppler domain under a restriction of a rectangular window according to a time domain channel matrix; determining a linear equalization matrix according to the effective channel matrix; and equalizing the sampled delay-Doppler domain signal in a low-complexity way according to the linear equalization matrix. The disclosure also discloses a linear equalization device of an OTFS system for realizing the linear equalization method and a computer-readable storage medium.Type: GrantFiled: February 24, 2022Date of Patent: September 10, 2024Assignee: Beijing University of Posts and TelecommunicationsInventors: Wenjun Xu, Tingting Zou, Hui Gao, Zhisong Bie, Ping Zhang, Fengyu Wang, Jiaru Lin
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Publication number: 20240077093Abstract: An energy storage apparatus is provided. The energy storage apparatus includes: a support structure, which is provided with at least one support layer in a height direction of the support structure; an energy storage device, an air outlet is defined at the top of the energy storage device, and an air inlet is defined on a sidewall of the energy storage device, where the number of the energy storage device is at least two, the energy storage devices are arranged in at least two layers through the support layer, and the support layer between adjacent layers of energy storage devices is hollowed out or configured in a partitioning manner; and an air guide structure mounted on the energy storage device and in communication with an air inlet of the energy storage device.Type: ApplicationFiled: July 10, 2023Publication date: March 7, 2024Applicant: Sungrow Power Supply Co., Ltd.Inventors: Yuan Gao, Wenjun Xu, Wei He
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Publication number: 20230398044Abstract: Described herein are aspherical hollow silica particles, processes for making aspherical hollow silica particles, and uses of aspherical hollow silica particles in sun care compositions. To form the aspherical hollow silica particles, deposition of a silica shell on a calcium carbonate template using a sol-gel chemistry is employed. Subsequent dissolution of the calcium carbonate template forms voids (e.g., a hollow interior) in the aspherical hollow silica particles.Type: ApplicationFiled: October 28, 2021Publication date: December 14, 2023Applicants: DOW GLOBAL TECHNOLOGIES LLC, ROHM AND HAAS COMPANYInventors: Jie XIONG, Fanwen ZENG, Wenjun XU, Dean M. MILLAR
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Publication number: 20230310298Abstract: An oil/polymer blend is provided comprising: an oil, wherein the oil is selected from the group consisting of silicone fluids, fluids containing 2 to 30 carbon atoms per molecule, and mixtures thereof; and a thickening polymer powder, thickening polymer, wherein the thickening polymer is a silylated cellulose polymer, comprising a cellulose polymer functionalized with —Si(R1)3 groups; wherein each R1 is independently selected from the group consisting of a hydrogen, a C1-8 alkyl group, a C1-8 haloalkyl group, an aryl group, a C1-8 alkylaryl group and a C1-8 haloalkylaryl group; and wherein the cellulose polymer has a weight average molecular weight of 50,000 to 1,500,000 Daltons.Type: ApplicationFiled: September 21, 2021Publication date: October 5, 2023Inventors: Wenjun Xu, Marc-Andre Courtemanche, Isabelle Van Reeth, Helene Dihang, Tian Lan, Myoungbae Lee, Matthew Mclaughlin
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Publication number: 20230301888Abstract: A polymer/hydrophobic ester oil blend is provided comprising (a) a cosmetically acceptable hydrophobic ester oil; and (b) a thickening polymer powder, thickening polymer, wherein the thickening polymer is a silylated cellulose polymer, comprising a cellulose polymer functionalized with —Si(R1)3 groups; wherein each R1 is independently selected from the group consisting of a hydrogen, a C1-8 alkyl group, a C1-8 haloalkyl group, an aryl group, a C1-8 alkylaryl group and a C1-8 haloalkylaryl group; and wherein the cellulose polymer has a weight average molecular weight of 50,000 to 1,500,000 Daltons. Also provided are suncare formulations containing same and methods of using same.Type: ApplicationFiled: September 21, 2021Publication date: September 28, 2023Inventors: Marc-Andre Courtemanche, Wenjun Xu, Isabelle Van Reeth, Helene Dihang, Tian Lan, Myoungbae Lee, Matthew Mclaughlin
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Patent number: 11663920Abstract: Disclosed is a method of path optimization for an unmanned aerial vehicle (UAV). In the method, users and the positions of the users are obtained; the users are divided into K wireless multicast user groups; K initial hovering positions corresponding to the K wireless multicast user groups are determined; and a first shortest flying path connecting the K initial hovering positions is determined; and the initial hovering positions of the UAV are optimized to obtain K final hovering positions and a final flying path. The present disclosure also discloses a device of path optimization for a UAV and a computer readable storage medium.Type: GrantFiled: September 17, 2020Date of Patent: May 30, 2023Assignee: Beijing University of Posts and TelecommunicationsInventors: Wenjun Xu, Chang Deng, Ping Zhang, Zhi Zhang, Hui Gao, Zhiyong Feng
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Publication number: 20230034183Abstract: An aqueous suncare formulation is provided, including: a cosmetically acceptable aqueous carrier; a suncare active; and a sulfated crystalline cellulose SPF booster; wherein the sulfated crystalline cellulose SPF booster both boosts the SPF of the aqueous suncare formulation and thickens the aqueous suncare formulation.Type: ApplicationFiled: January 19, 2021Publication date: February 2, 2023Inventors: Wenjun Xu, Isabelle Van Reeth, Yuanqiao Rao
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Publication number: 20220395447Abstract: A personal care composition is provided, including: a cosmetically acceptable carrier; and a silicon glycan of formula (I): wherein each A comprises an independently selected saccharide moiety; wherein each W is an independently selected beta-amino alcohol moiety; wherein each Y comprises an independently selected organosilicon moiety; wherein each R is independently selected from substituted or unsubstituted hydrocarbyl groups, ether moieties, amine moieties, and H; wherein each R1 is independently selected from substituted or unsubstituted hydrocarbyl groups and H; wherein each Z is an independently selected ether moiety; wherein each subscript a is independently 0 or 1; wherein subscripts x and y are each independently from ?0 to <1; wherein subscript z is selected from >0 to 1; with the proviso that x+y+z=1; and wherein moieties indicated by subscripts x, y, and z may be in randomized or block form in the silicon glycan.Type: ApplicationFiled: November 18, 2020Publication date: December 15, 2022Inventors: Wenjun Xu, Marc-Andre Courtemanche, Emmett M. Partain, III, Bethany K. Johnson, Mike Ferritto, Jodi Mecca, Helene Dihang, Isabelle Van Reeth
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Publication number: 20220182265Abstract: Disclosed is a low-complexity linear equalization method for an Orthogonal Time Frequency Space (OTFS) system. The method may include: receiving a time domain signal passing through a linear time-varying (LTV) channel; sampling the time domain signal to obtain a sampled signal; demodulating the sampled signal to obtain a demodulated signal; performing a Symplectic Finite Fourier Transform (SFFT) on the demodulated signal to obtain a sampled delay-Doppler domain signal; determining an effective channel matrix in a delay-Doppler domain under a restriction of a rectangular window according to a time domain channel matrix; determining a linear equalization matrix according to the effective channel matrix; and equalizing the sampled delay-Doppler domain signal in a low-complexity way according to the linear equalization matrix. The disclosure also discloses a linear equalization device of an OTFS system for realizing the linear equalization method and a computer-readable storage medium.Type: ApplicationFiled: February 24, 2022Publication date: June 9, 2022Applicant: Beijing University of Posts and TelecommunicationsInventors: Wenjun XU, Tingting ZOU, Hui GAO, Zhisong BIE, Ping ZHANG, Fengyu WANG, Jiaru LIN
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Patent number: 11283495Abstract: Disclosed are methods for beam tracking. In the methods, a transmitting unmanned aerial vehicle (UAV) receives motion state information (MSI) of a receiving UAV and determines a first beam angle from the transmitting UAV to the receiving UAV according to the MSI of the receiving UAV. Then the transmitting UAV selects a codeword from a codebook according to the first beam angle. Finally, the transmitting UAV determines an activated sub-array and a beam-forming vector of the CCA according to the size of the activated sub-array corresponding to the sub-codebook to which the codeword belongs, a second beam angle corresponding to the codeword and a location of a central antenna element of an activated sub-array corresponding to the codeword and transmits information using the beam-forming vector. One or more examples of the present disclosure also provide a method for beam tracking implemented by the receiving UAV, methods for generating a codebook.Type: GrantFiled: August 3, 2021Date of Patent: March 22, 2022Assignee: Beijing University of Posts and TelecommunicationsInventors: Wenjun Xu, Jinglin Zhang, Hui Gao, Zhiyong Feng, Zhi Zhang, Jiaru Lin
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Patent number: 11185477Abstract: An SPF booster is provided, comprising: a multistage polymeric particle having a core comprising polymerized units of a monoethylenically unsaturated carboxylic acid core monomer and a non-ionic ethylenically unsaturated core monomer; an inner shell comprising polymerized units of a non-ionic ethylenically unsaturated inner shell monomer; a monoethylenically unsaturated carboxylic acid inner shell monomer and an aliphatic inner shell monomer; an outer shell comprising polymerized units of a non-ionic ethylenically unsaturated outer shell monomer; an aliphatic outer shell monomer; a monoethylenically unsaturated non-carboxylic acid outer shell monomer and an ethylenically unsaturated surfactant outer shell monomer; wherein the core, when dry, contains a void; and wherein the multistage polymeric particle has an average particle size, when dry, of 50 to 1,000 nm.Type: GrantFiled: June 28, 2018Date of Patent: November 30, 2021Assignees: Dow Global Technologies LLC, Rohm and Haas CompanyInventors: Wenjun Xu, Fanwen Zeng, Benjamin Yezer, Liang Chen, Dale C. Schmidt, Inna Shulman
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Publication number: 20210367644Abstract: Disclosed are methods for beam tracking. In the methods, a transmitting unmanned aerial vehicle (UAV) receives motion state information (MSI) of a receiving UAV and determines a first beam angle from the transmitting UAV to the receiving UAV according to the MSI of the receiving UAV. Then the transmitting UAV selects a codeword from a codebook according to the first beam angle. Finally, the transmitting UAV determines an activated sub-array and a beam-forming vector of the CCA according to the size of the activated sub-array corresponding to the sub-codebook to which the codeword belongs, a second beam angle corresponding to the codeword and a location of a central antenna element of an activated sub-array corresponding to the codeword and transmits information using the beam-forming vector. One or more examples of the present disclosure also provide a method for beam tracking implemented by the receiving UAV, methods for generating a codebook.Type: ApplicationFiled: August 3, 2021Publication date: November 25, 2021Applicant: Beijing University of Posts and TelecommunicationsInventors: Wenjun XU, Jinglin ZHANG, Hui GAO, Zhiyong FENG, Zhi ZHANG, Jiaru LIN
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Patent number: 11129082Abstract: A method of route construction of an unmanned aerial vehicle (UAV) network includes: obtaining transmission information of the UAV network; determining a relay set from the UAV network based on the transmission information; wherein, the relay set includes at least one UAV; determining environment state parameters according to the transmission information and the information of the relay set; inputting the environment state parameters into a Deep Q-Learning network (DQN) to obtain an accumulated reward corresponding to each UAV; and selecting a UAV with the largest accumulated reward as a target UAV. This disclosure also discloses a UAV and computer readable storage medium that can be used to construct routes for a UAV network.Type: GrantFiled: July 27, 2020Date of Patent: September 21, 2021Assignee: Beijing University of Posts and TelecommunicationsInventors: Wenjun Xu, Chunlei Huang, Zhi Zhang, Shaosheng Li, Ping Zhang, Jiaru Lin
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Patent number: 11058613Abstract: A suncare formulation comprising: a dermatologically acceptable organic carrier; a UV radiation absorbing agent; and an SPF booster; wherein the SPF booster comprises a multistage polymeric particle having a core comprising polymerized units of a monoethylenically unsaturated carboxylic acid core monomer and a non-ionic ethylenically unsaturated core monomer; an inner shell comprising polymerized units of a non-ionic ethylenically unsaturated inner shell monomer; a monoethylenically unsaturated carboxylic acid inner shell monomer and an aliphatic inner shell monomer; an outer shell comprising polymerized units of a non-ionic ethylenically unsaturated outer shell monomer; an aliphatic outer shell monomer; a monoethylenically unsaturated non-carboxylic acid outer shell monomer and an ethylenically unsaturated surfactant outer shell monomer; wherein the core, when dry, contains a void; wherein the multistage polymeric particle has an average particle size, when dry, of 50 to 1,000 nm.Type: GrantFiled: June 28, 2018Date of Patent: July 13, 2021Assignees: Dow Global Technologies LLC, Rohm and Haas CompanyInventors: Wenjun Xu, Fanwen Zeng, Benjamin Yezer, Liang Chen, Dale C. Schmidt, Inna Shulman
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Publication number: 20210085573Abstract: An SPF booster is provided, comprising: a multistage polymeric particle having a core comprising polymerized units of a monoethylenically unsaturated carboxylic acid core monomer and a non-ionic ethylenically unsaturated core monomer; an inner shell comprising polymerized units of a non-ionic ethylenically unsaturated inner shell monomer; a monoethylenically unsaturated carboxylic acid inner shell monomer and an aliphatic inner shell monomer; an outer shell comprising polymerized units of a non-ionic ethylenically unsaturated outer shell monomer; an aliphatic outer shell monomer; a monoethylenically unsaturated non-carboxylic acid outer shell monomer and an ethylenically unsaturated surfactant outer shell monomer; wherein the core, when dry, contains a void; and wherein the multistage polymeric particle has an average particle size, when dry, of 50 to 1,000 nm.Type: ApplicationFiled: June 28, 2018Publication date: March 25, 2021Inventors: Wenjun XU, Fanwen ZENG, Benjamin YEZER, Liang CHEN, Dale C. SCHMIDT, Inna SHULMAN
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Publication number: 20210003412Abstract: Disclosed is a method of path optimization for an unmanned aerial vehicle (UAV). In the method, users and the positions of the users are obtained; the users are divided into K wireless multicast user groups; K initial hovering positions corresponding to the K wireless multicast user groups are determined; and a first shortest flying path connecting the K initial hovering positions is determined; and the initial hovering positions of the UAV are optimized to obtain K final hovering positions and a final flying path. The present disclosure also discloses a device of path optimization for a UAV and a computer readable storage medium.Type: ApplicationFiled: September 17, 2020Publication date: January 7, 2021Inventors: Wenjun XU, Chang DENG, Ping ZHANG, Zhi ZHANG, Hui GAO, Zhiyong FENG
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Publication number: 20200359297Abstract: A method of route construction of an unmanned aerial vehicle (UAV) network includes: obtaining transmission information of the UAV network; determining a relay set from the UAV network based on the transmission information; wherein, the relay set includes at least one UAV; determining environment state parameters according to the transmission information and the information of the relay set; inputting the environment state parameters into a Deep Q-Learning network (DQN) to obtain an accumulated reward corresponding to each UAV; and selecting a UAV with the largest accumulated reward as a target UAV. This disclosure also discloses a UAV and computer readable storage medium that can be used to construct routes for a UAV network.Type: ApplicationFiled: July 27, 2020Publication date: November 12, 2020Inventors: Wenjun XU, Chunlei HUANG, Zhi ZHANG, Shaosheng LI, Ping ZHANG, Jiaru LIN
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Patent number: D981195Type: GrantFiled: December 13, 2021Date of Patent: March 21, 2023Inventors: Jin Zhao, Wenjun Xu