Patents by Inventor Sergey Li
Sergey 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: 20240070521Abstract: A layer freezing and data sieving technique used in a sparse training domain for object recognition, providing end-to-end dataset-efficient training. The layer freezing and data sieving methods are seamlessly incorporated into a sparse training algorithm to form a generic framework. The generic framework consistently outperforms prior approaches and significantly reduces training floating point operations per second (FLOPs) and memory costs while preserving high accuracy. The reduction in training FLOPs comes from three sources: weight sparsity, frozen layers, and a shrunken dataset. The training acceleration depends on different factors, e.g., the support of the sparse computation, layer type and size, and system overhead. The FLOPs reduction from the frozen layers and shrunken dataset leads to higher actual training acceleration than weight sparsity.Type: ApplicationFiled: August 23, 2022Publication date: February 29, 2024Inventors: Jian Ren, Sergey Tulyakov, Yanyu Li, Geng Yuan
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Publication number: 20220319740Abstract: A method of fabricating a superconducting wire includes forming a buffer layer on the substrate, the buffer layer including an Al2O3 layer, the Al2O3 layer being formed by reactive magnetron sputtering in which first oxygen gas as reactant gas and a sputtering target made of aluminium metal are used, the Al2O3 layer being formed while being supplied the first oxygen gas at a first concentration, the first concentration being a concentration of the first oxygen gas at which an emission intensity of Al in plasma near a surface of the sputtering target is not less than 25% and not more than 80% of a first reference value, the first reference value being the emission intensity of Al at which the concentration of the first oxygen gas is zero; and forming a superconducting layer above the buffer layer.Type: ApplicationFiled: May 21, 2019Publication date: October 6, 2022Inventors: Valery PETRYKIN, Sergey LI
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Patent number: 11434881Abstract: An apparatus and method of manufacturing an apparatus that includes a rectangular frame, a first load bearing conductive support bisecting the rectangular frame lengthwise, and two artificial muscle actuators disposed on the same sides of the rectangular frame as the first load bearing conductive support on opposite sides of the first load bearing conductive support is disclosed. The apparatus includes a non-conductive platform, where the width of the frame is sufficiently wide to prevent the non-conductive platform from touching the sides of the frame when rotated about the axis of the load bearing support. The apparatus includes a device disposed in the center of the non-conductive platform. Individual actuation of the artificial muscle actuators rotates the non-conductive platform about the axis of the first load bearing conductive support.Type: GrantFiled: December 19, 2019Date of Patent: September 6, 2022Assignee: LINTEC OF AMERICA, INC.Inventors: Marcio Dias Lima, Sergey Li
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Patent number: 11299825Abstract: Methods and a device for the continuous manufacturing of artificial muscle actuator device fibers are disclosed. The method includes: threading an untwisted fiber along the axis of a tube and inside the tube that includes a heating means to raise the localized temperature of a cross-section of the tube to a predetermined temperature; providing a tension on the untwisted fiber; and twisting the untwisted fiber while the fiber is within the tube.Type: GrantFiled: February 27, 2018Date of Patent: April 12, 2022Assignee: LINTEC OF AMERICAInventors: Marcio Dias Lima, Sergey Li
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Patent number: 11199181Abstract: Methods, system, and apparatus for producing an actuator device are disclosed. The method may include twisting a muscle fiber; coiling the twisted muscle fiber about a mandrel; securing the muscle fiber onto the mandrel using a securing means; heating the muscle fiber to a predetermined temperature using a heating means; and removing the coiled muscle fiber from the mandrel. The twisting, coiling, securing, heating, and removing is a process that is continued until the muscle fiber is a desired length.Type: GrantFiled: February 22, 2018Date of Patent: December 14, 2021Assignee: LINTEC OF AMERICA, INC.Inventors: Randy Allen, Marcio Dias Lima, Sergey Li
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Patent number: 11067063Abstract: An actuating device and a method for manufacturing an actuating device, where the method includes wrapping a conductive wire (204) around a polymer fiber (202) at a set tension, and heating the polymer fiber and wire to a temperature that exceeds the glass transition temperature of the polymer fiber for a predetermined amount of time to partially embed the conductive wire into the polymer fiber. The method also includes cooling the polymer fiber and wire to below the glass transition temperature resulting in a wired polymer fiber wherein at least part of the conductive wire is embedded in the polymer fiber.Type: GrantFiled: November 21, 2018Date of Patent: July 20, 2021Assignee: LINTEC OF AMERICA, INC.Inventors: Marilu Guerrero, Sergey Li, Randy Allen, Anthony Hingeley
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Publication number: 20210164452Abstract: Polymer and nanotube-based actuators that include a thermochromic coating is disclosed. The actuators include a thermochromic material applied to a surface of the core fiber or the conductive element. Upon heating the actuator, the thermochromic coating undergoes a color transition to indicate a pre-determined temperature correlated to a rated critical temperature, important temperature of the actuator components, or a level of actuation.Type: ApplicationFiled: May 10, 2019Publication date: June 3, 2021Applicant: LINTEC OF AMERICA, INC.Inventors: Jaeah LEE, Marcio Dias LIMA, Sergey LI, Raquel OVALLE-ROBLES
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Publication number: 20200362836Abstract: An actuating device and a method for manufacturing an actuating device, where the method includes wrapping a conductive wire (204) around a polymer fiber (202) at a set tension, and heating the polymer fiber and wire to a temperature that exceeds the glass transition temperature of the polymer fiber for a predetermined amount of time to partially embed the conductive wire into the polymer fiber. The method also includes cooling the polymer fiber and wire to below the glass transition temperature resulting in a wired polymer fiber wherein at least part of the conductive wire is embedded in the polymer fiber.Type: ApplicationFiled: November 21, 2018Publication date: November 19, 2020Applicant: Lintec of America, Inc.Inventors: Marilu Guerrero, Sergey Li, Randy Allen, Anthony Hingeley
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Publication number: 20200200153Abstract: An apparatus and method of manufacturing an apparatus that includes a rectangular frame, a first load bearing conductive support bisecting the rectangular frame lengthwise, and two artificial muscle actuators disposed on the same sides of the rectangular frame as the first load bearing conductive support on opposite sides of the first load bearing conductive support is disclosed. The apparatus includes a non-conductive platform, where the width of the frame is sufficiently wide to prevent the non-conductive platform from touching the sides of the frame when rotated about the axis of the load bearing support. The apparatus includes a device disposed in the center of the non-conductive platform. Individual actuation of the artificial muscle actuators rotates the non-conductive platform about the axis of the first load bearing conductive support.Type: ApplicationFiled: December 19, 2019Publication date: June 25, 2020Applicant: Lintec of America, Inc.Inventors: Marcio Dias Lima, Sergey Li
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Publication number: 20200000572Abstract: Methods and a device for the continuous manufacturing of artificial muscle actuator device fibers are disclosed. The method includes: threading an untwisted fiber along the axis of a tube and inside the tube that includes a heating means to raise the localized temperature of a cross-section of the tube to a predetermined temperature; providing a tension on the untwisted fiber; and twisting the untwisted fiber while the fiber is within the tube.Type: ApplicationFiled: February 27, 2018Publication date: January 2, 2020Applicant: Lintec of America, Inc.Inventors: Marcio Dias Lima, Sergey Li
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Publication number: 20200003189Abstract: Methods, system, and apparatus for producing an actuator device are disclosed. The method may include twisting a muscle fiber; coiling the twisted muscle fiber about a mandrel; securing the muscle fiber onto the mandrel using a securing means; heating the muscle fiber to a predetermined temperature using a heating means; and removing the coiled muscle fiber from the mandrel. The twisting, coiling, securing, heating, and removing is a process that is continued until the muscle fiber is a desired length.Type: ApplicationFiled: February 22, 2018Publication date: January 2, 2020Applicant: Lintec of America, Inc.Inventors: Randy Allen, Marcio Dias Lima, Sergey Li
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Publication number: 20190307919Abstract: An actuator device that includes at least one fiber, and at least one first coating is disclosed. The first coating encloses the at least one fiber. The actuator device may include a plurality of fibers and/or a conducting material. The coatings may enclose the plurality of fibers, or each individual fiber. The coatings may provide moisture protection, UV protection, saline protection, and oxidation protection. The coating may be thermally and electrically conducting or insulating, depending on the specific function and environment of the actuator device.Type: ApplicationFiled: October 6, 2017Publication date: October 10, 2019Applicant: Lintec of America, Inc.Inventors: Marcio Dias Lima, Sergey Li
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Patent number: 10196271Abstract: A nanofiber yarn that includes a plurality of nanofibers twisted into a yarn along an alignment axis. The nanofibers of the plurality of nanofibers have a ratio of nanofiber length to nanofiber circumference of at least 50. The yarn has a helix angle measured relative to the alignment axis of from 5° to 30°. The yarn has tensile strength of at least 280 MPa. A nanofiber fabric that includes a first sheet of multiwalled nanotubes and a second sheet of multiwalled nanotubes on the first sheet of multiwalled nanotubes. The multiwalled nanotubes of the first sheet are aligned in a first direction. The multiwalled nanotubes of the second sheet are aligned in the first direction. The first sheet and the second sheet are aligned so that the multiwalled nanotubes of the first sheet and the second sheet are both aligned in the first direction.Type: GrantFiled: January 9, 2018Date of Patent: February 5, 2019Assignee: The Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Kenneth Ross Atkinson, Ali E. Aliev, Sergey Li, Chris Williams
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Publication number: 20190002283Abstract: A nanofiber forest on a substrate can be patterned to produce a patterned assembly of nanofibers that can be drawn to form nanofiber sheets, ribbons, or yarns.Type: ApplicationFiled: January 9, 2018Publication date: January 3, 2019Applicant: Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Kenneth Ross Atkinson, Ali E. Aliev, Sergey Li, Chris Williams
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Patent number: 9944529Abstract: A process of producing a yarn, ribbon or sheet that includes nanofibers in which the process includes forming a yarn, ribbon or sheet comprising nanofibers, and applying an enhancing agent comprising a polymer to the yarn, ribbon or sheet.Type: GrantFiled: July 7, 2016Date of Patent: April 17, 2018Assignee: Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Kenneth Ross Atkinson, Ali E. Aliev, Sergey Li, Chris Williams
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Patent number: 9862607Abstract: Fabricating a nanofiber sheet, ribbon, or yarn by a continuous process that includes synthesizing a nanofiber forest in a forest growth region on a substrate, wherein the nanofiber forest comprises a parallel array of nanofibers, and further includes drawing said nanofibers from the nanofiber forest to form a primary assembly that is a sheet, ribbon or yarn. The substrate continuously moves from the furnace growth region into a region where the nanofibers in the forest are drawn.Type: GrantFiled: July 21, 2016Date of Patent: January 9, 2018Assignee: Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Kenneth Ross Atkinson, Ali E. Aliev, Sergey Li, Chris Williams
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Patent number: 9845554Abstract: The present invention is directed to nanofiber yarns, ribbons, and sheets; to methods of making said yarns, ribbons, and sheets; and to applications of said yarns, ribbons, and sheets. In some embodiments, the nanotube yarns, ribbons, and sheets comprise carbon nanotubes. Particularly, such carbon nanotube yarns of the present invention provide unique properties and property combinations such as extreme toughness, resistance to failure at knots, high electrical and thermal conductivities, high absorption of energy that occurs reversibly, up to 13% strain-to-failure compared with the few percent strain-to-failure of other fibers with similar toughness, very high resistance to creep, retention of strength even when heated in air at 450° C. for one hour, and very high radiation and UV resistance, even when irradiated in air. Furthermore these nanotube yarns can be spun as one micron diameter yarns and plied at will to make two-fold, four-fold, and higher fold yarns.Type: GrantFiled: February 26, 2016Date of Patent: December 19, 2017Assignee: Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Ali E. Aliev, Sergey Li, Chris Williams
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Publication number: 20170327377Abstract: A nanofiber forest on a substrate can be patterned to produce a patterned assembly of nanofibers that can be drawn to form nanofiber sheets, ribbons, or yarns.Type: ApplicationFiled: October 21, 2016Publication date: November 16, 2017Applicant: Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Kenneth Ross Atkinson, Ali E. Aliev, Sergey Li, Chris Williams
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Patent number: 9815699Abstract: A nanofiber forest on a substrate can be patterned to produce a patterned assembly of nanofibers that can be drawn to form nanofiber sheets, ribbons, or yarns.Type: GrantFiled: October 21, 2016Date of Patent: November 14, 2017Assignee: Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Kenneth Ross Atkinson, Ali E. Aliev, Sergey Li, Chris Williams
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Patent number: 9688536Abstract: A process of producing a yarn, ribbon or sheet comprising nanofibers that includes infiltrating a liquid into the yarn, ribbon or sheet and evaporating the liquid from the yarn, ribbon, or sheet to strengthen the yarn, ribbon or sheet. The yarn, ribbon, or sheet can be formed by solid-state draw from a carbon nanotube forest.Type: GrantFiled: July 7, 2016Date of Patent: June 27, 2017Assignee: Board of Regents, The University of Texas SystemInventors: Mei Zhang, Shaoli Fang, Ray H. Baughman, Anvar A. Zakhidov, Kenneth Ross Atkinson, Ali E. Aliev, Sergey Li, Chris Williams