Patents by Inventor Yilei Li
Yilei 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: 20200237339Abstract: Nonlinear ultrasound imaging systems and methods are disclose. In one aspect, a nonlinear ultrasound imaging system includes a first transducer configured to transmit a first ultrasound signal along a scan line, a second transducer configured to sweep a second ultrasound signal along the scan line such that the first and second ultrasound signals intersect at a plurality of voxels, and a third transducer configured to receive echoes associated with interactions of the first and second ultrasound signals at the plurality of voxels. The nonlinear ultrasound imaging system further includes a processor configured to generate an ultrasound image based on the echoes.Type: ApplicationFiled: December 23, 2019Publication date: July 30, 2020Inventors: Yilei Li, Steven Chu
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Patent number: 10613027Abstract: Techniques for forming nanoribbon or bulk graphene-based SPR sensors are provided. In one aspect, a method of forming a graphene-based SPR sensor is provided which includes the steps of: depositing graphene onto a substrate, wherein the substrate comprises a dielectric layer on a conductive layer, and wherein the graphene is deposited onto the dielectric layer; and patterning the graphene into multiple, evenly spaced graphene strips, wherein each of the graphene strips has a width of from about 50 nanometers to about 5 micrometers, and ranges therebetween, and wherein the graphene strips are separated from one another by a distance of from about 5 nanometers to about 50 micrometers, and ranges therebetween. Alternatively, bulk graphene may be employed and the dielectric layer is used to form periodic regions of differing permittivity. A testing apparatus and method of analyzing a sample using the present SPR sensors are also provided.Type: GrantFiled: August 1, 2016Date of Patent: April 7, 2020Assignee: International Business Machines CorporationInventors: Phaedon Avouris, Damon B. Farmer, Yilei Li, Hugen Yan
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Patent number: 10564097Abstract: Techniques for forming nanoribbon or bulk graphene-based SPR sensors are provided. In one aspect, a method of forming a graphene-based SPR sensor is provided which includes the steps of: depositing graphene onto a substrate, wherein the substrate comprises a dielectric layer on a conductive layer, and wherein the graphene is deposited onto the dielectric layer; and patterning the graphene into multiple, evenly spaced graphene strips, wherein each of the graphene strips has a width of from about 50 nanometers to about 5 micrometers, and ranges therebetween, and wherein the graphene strips are separated from one another by a distance of from about 5 nanometers to about 50 micrometers, and ranges therebetween. Alternatively, bulk graphene may be employed and the dielectric layer is used to form periodic regions of differing permittivity. A testing apparatus and method of analyzing a sample using the present SPR sensors are also provided.Type: GrantFiled: August 1, 2016Date of Patent: February 18, 2020Assignee: International Business Machines CorporationInventors: Phaedon Avouris, Damon B. Farmer, Yilei Li, Hugen Yan
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Publication number: 20200050429Abstract: A multiplier for calculating a multiplication of a first fixed point number and a second fixed point number comprises a converter and a restoration circuit. The converter is configured to convert the first fixed point number to a sign, a mantissa, and an exponent. At least one of a bit width of the sign, a bit width of the mantissa, and a bit width of the exponent is dynamically configured based on a position of a layer associated with the first fixed point number in a neural network, a position of a pixel in an input feature map associated with the first fixed point number, and/or a channel associated with the first fixed point number. The restoration circuit is configured to calculate the multiplication based on the sign, the mantissa, the exponent, and the second fixed point number.Type: ApplicationFiled: July 24, 2019Publication date: February 13, 2020Applicant: NOVUMIND LIMITEDInventors: Miao Li, Pingfan Meng, Yilei Li, Cheng-Ying Ko, Jeffrey Weifung Lien
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Patent number: 10555721Abstract: Nonlinear ultrasound imaging systems and methods are disclose. In one aspect, a nonlinear ultrasound imaging system includes a first transducer configured to transmit a first ultrasound signal along a scan line, a second transducer configured to sweep a second ultrasound signal along the scan line such that the first and second ultrasound signals intersect at a plurality of voxels, and a third transducer configured to receive echoes associated with interactions of the first and second ultrasound signals at the plurality of voxels. The nonlinear ultrasound imaging system further includes a processor configured to generate an ultrasound image based on the echoes.Type: GrantFiled: May 25, 2018Date of Patent: February 11, 2020Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Yilei Li, Steven Chu
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Patent number: 10552732Abstract: A multi-layer artificial neural network having at least one high-speed communication interface and N computational layers is provided. N is an integer larger than 1. The N computational layers are serially connected via the at least one high-speed communication interface. Each of the N computational layers respectively includes a computation circuit and a local memory. The local memory is configured to store input data and learnable parameters for the computation circuit. The computation circuit in the ith computational layer provides its computation results, via the at least one high-speed communication interface, to the local memory in the (i+1)th computational layer as the input data for the computation circuit in the (i+1)th computational layer, wherein i is an integer index ranging from 1 to (N?1).Type: GrantFiled: August 22, 2016Date of Patent: February 4, 2020Assignee: Kneron Inc.Inventors: Yilei Li, Yuan Du, Chun-Chen Liu, Li Du
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Publication number: 20190008485Abstract: Ultrasound imaging systems and methods with frequency (spectral) compounding for speckle reduction are disclosed. In one aspect, an ultrasound imaging system includes a transducer probe with interleaved transmit and receive arrays. The system may utilize ultrasound pulses having an optimized time-bandwidth product. In one aspect, a transducer probe with separate transmit and receive elements can enable transmission and reception of multiple ultrasound pulses, each centered at a different frequency, during the time of one A-scan. Thus, such a system can capture multiple independent speckle images without reducing overall B-mode framerate. In another aspect, the system may transmit a broadband pulse and may obtain separate speckle images by filtering the received echo using multiple spectral filters. The system may compound multiple images captured at different frequencies to provide speckle reduction.Type: ApplicationFiled: July 6, 2018Publication date: January 10, 2019Inventors: Yilei Li, Steven Chu
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Publication number: 20180338744Abstract: Nonlinear ultrasound imaging systems and methods are disclose. In one aspect, a nonlinear ultrasound imaging system includes a first transducer configured to transmit a first ultrasound signal along a scan line, a second transducer configured to sweep a second ultrasound signal along the scan line such that the first and second ultrasound signals intersect at a plurality of voxels, and a third transducer configured to receive echoes associated with interactions of the first and second ultrasound signals at the plurality of voxels. The nonlinear ultrasound imaging system further includes a processor configured to generate an ultrasound image based on the echoes.Type: ApplicationFiled: May 25, 2018Publication date: November 29, 2018Inventors: Yilei Li, Steven Chu
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Publication number: 20180053084Abstract: A multi-layer artificial neural network having at least one high-speed communication interface and N computational layers is provided. N is an integer larger than 1. The N computational layers are serially connected via the at least one high-speed communication interface. Each of the N computational layers respectively includes a computation circuit and a local memory. The local memory is configured to store input data and learnable parameters for the computation circuit. The computation circuit in the ith computational layer provides its computation results, via the at least one high-speed communication interface, to the local memory in the (i+1)th computational layer as the input data for the computation circuit in the (i+1)th computational layer, wherein i is an integer index ranging from 1 to (N?1).Type: ApplicationFiled: August 22, 2016Publication date: February 22, 2018Inventors: Yilei Li, Yuan Du, Chun-Chen Liu, Li Du
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Patent number: 9594018Abstract: Techniques for forming nanoribbon or bulk graphene-based SPR sensors are provided. In one aspect, a method of forming a graphene-based SPR sensor is provided which includes the steps of: depositing graphene onto a substrate, wherein the substrate comprises a dielectric layer on a conductive layer, and wherein the graphene is deposited onto the dielectric layer; and patterning the graphene into multiple, evenly spaced graphene strips, wherein each of the graphene strips has a width of from about 50 nanometers to about 5 micrometers, and ranges therebetween, and wherein the graphene strips are separated from one another by a distance of from about 5 nanometers to about 50 micrometers, and ranges therebetween. Alternatively, bulk graphene may be employed and the dielectric layer is used to form periodic regions of differing permittivity. A testing apparatus and method of analyzing a sample using the present SPR sensors are also provided.Type: GrantFiled: August 1, 2016Date of Patent: March 14, 2017Assignee: International Business Machines CorporationInventors: Phaedon Avouris, Damon B. Farmer, Yilei Li, Hugen Yan
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Publication number: 20160341661Abstract: Techniques for forming nanoribbon or bulk graphene-based SPR sensors are provided. In one aspect, a method of forming a graphene-based SPR sensor is provided which includes the steps of: depositing graphene onto a substrate, wherein the substrate comprises a dielectric layer on a conductive layer, and wherein the graphene is deposited onto the dielectric layer; and patterning the graphene into multiple, evenly spaced graphene strips, wherein each of the graphene strips has a width of from about 50 nanometers to about 5 micrometers, and ranges therebetween, and wherein the graphene strips are separated from one another by a distance of from about 5 nanometers to about 50 micrometers, and ranges therebetween. Alternatively, bulk graphene may be employed and the dielectric layer is used to form periodic regions of differing permittivity. A testing apparatus and method of analyzing a sample using the present SPR sensors are also provided.Type: ApplicationFiled: August 1, 2016Publication date: November 24, 2016Inventors: Phaedon Avouris, Damon B. Farmer, Yilei Li, Hugen Yan
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Publication number: 20160341662Abstract: Techniques for forming nanoribbon or bulk graphene-based SPR sensors are provided. In one aspect, a method of forming a graphene-based SPR sensor is provided which includes the steps of: depositing graphene onto a substrate, wherein the substrate comprises a dielectric layer on a conductive layer, and wherein the graphene is deposited onto the dielectric layer; and patterning the graphene into multiple, evenly spaced graphene strips, wherein each of the graphene strips has a width of from about 50 nanometers to about 5 micrometers, and ranges therebetween, and wherein the graphene strips are separated from one another by a distance of from about 5 nanometers to about 50 micrometers, and ranges therebetween. Alternatively, bulk graphene may be employed and the dielectric layer is used to form periodic regions of differing permittivity. A testing apparatus and method of analyzing a sample using the present SPR sensors are also provided.Type: ApplicationFiled: August 1, 2016Publication date: November 24, 2016Inventors: Phaedon Avouris, Damon B. Farmer, Yilei Li, Hugen Yan
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Patent number: 9491028Abstract: A chip-to-chip communications circuit which is particularly well-suited for short range wired RF communication from one integrated circuit (chip) to another is presented. The circuits preferably utilize multi-frequency quadrature amplitude modulation (QAM) mechanisms for converting digital data bits from a parallel form into a serial analog stream for communication over a chip I/O connection. During a phase calibration cycle, a phase adjustment controller in the transmitter interoperates with a phase adjustment controller in the receiver, to adjust a phase locked-loop (PLL) circuit to correct for the phase delay arising in response to signal propagation between transmitter and receiver.Type: GrantFiled: November 23, 2015Date of Patent: November 8, 2016Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Sheau Jiung Lee, Yilei Li, Wei-Han Cho, Mau-Chung Frank Chang
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Patent number: 9423345Abstract: Techniques for forming nanoribbon or bulk graphene-based SPR sensors are provided. In one aspect, a method of forming a graphene-based SPR sensor is provided which includes the steps of: depositing graphene onto a substrate, wherein the substrate comprises a dielectric layer on a conductive layer, and wherein the graphene is deposited onto the dielectric layer; and patterning the graphene into multiple, evenly spaced graphene strips, wherein each of the graphene strips has a width of from about 50 nanometers to about 5 micrometers, and ranges therebetween, and wherein the graphene strips are separated from one another by a distance of from about 5 nanometers to about 50 micrometers, and ranges therebetween. Alternatively, bulk graphene may be employed and the dielectric layer is used to form periodic regions of differing permittivity. A testing apparatus and method of analyzing a sample using the present SPR sensors are also provided.Type: GrantFiled: June 24, 2014Date of Patent: August 23, 2016Assignee: International Business Machines CorporationInventors: Phaedon Avouris, Damon B. Farmer, Yilei Li, Hugen Yan
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Patent number: 9356582Abstract: A voltage controlled oscillator (VCO) which can be configured with a smaller tuning range than is ordinarily required is presented. Ordinarily, the tuning range is selected much broader than the application warrants so that sufficient range is still provided despite VCO process variations. The inventive VCO is able to substantially eliminate the effects of process variation by utilizing a calibration circuit and process, so that variation in VCO device operation is minimized despite substantial process variation. Accordingly, the inventive VCO device is subject to reduced levels of jitter as its range need not be utilized for overcoming process variation arising during device fabrication.Type: GrantFiled: September 10, 2015Date of Patent: May 31, 2016Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Sheau Jiung Lee, Yilei Li, Gabriel Virbila, Mau-Chung Frank Chang
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Publication number: 20160149746Abstract: A chip-to-chip communications circuit which is particularly well-suited for short range wired RF communication from one integrated circuit (chip) to another is presented. The circuits preferably utilize multi-frequency quadrature amplitude modulation (QAM) mechanisms for converting digital data bits from a parallel form into a serial analog stream for communication over a chip I/O connection. During a phase calibration cycle, a phase adjustment controller in the transmitter interoperates with a phase adjustment controller in the receiver, to adjust a phase locked-loop (PLL) circuit to correct for the phase delay arising in response to signal propagation between transmitter and receiver.Type: ApplicationFiled: November 23, 2015Publication date: May 26, 2016Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Sheau Jiung Lee, Yilei Li, Wei-Han Ho, Mau-Chung Frank Chang
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Publication number: 20160072482Abstract: A voltage controlled oscillator (VCO) which can be configured with a smaller tuning range than is ordinarily required is presented. Ordinarily, the tuning range is selected much broader than the application warrants so that sufficient range is still provided despite VCO process variations. The inventive VCO is able to substantially eliminate the effects of process variation by utilizing a calibration circuit and process, so that variation in VCO device operation is minimized despite substantial process variation. Accordingly, the inventive VCO device is subject to reduced levels of jitter as its range need not be utilized for overcoming process variation arising during device fabrication.Type: ApplicationFiled: September 10, 2015Publication date: March 10, 2016Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Sheau Jiung Lee, Yilei Li, Gabriel Virbila, Mau-Chung Frank Chang
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Patent number: 9242836Abstract: Disclosed are an apparatus and a method of automatically adjusting a tension of a steel rope that comprises a guide system along which a mining elevator car moves vertically. The apparatus and the method allow the flexible guide rail to be structurally simple, convenient to process, reliable in performance, and easy to install and to maintain. The apparatus and the method allow restriction of vertical orientation and horizontal deflection, and are capable of real-time detection and automatic adjustment of the tension in the flexible guide rail of the elevator.Type: GrantFiled: August 25, 2011Date of Patent: January 26, 2016Assignees: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, DONGNAN ELEVATOR CO., LTD.Inventors: Guohua Cao, Zhencai Zhu, Renyuan Wu, Jiancong Qin, Hongqiao Kang, Weihong Peng, Guoan Chen, Chongqiu Wang, Xingguo Shao, Yilei Li, Gongbo Zhou
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Publication number: 20150369735Abstract: Techniques for forming nanoribbon or bulk graphene-based SPR sensors are provided. In one aspect, a method of forming a graphene-based SPR sensor is provided which includes the steps of: depositing graphene onto a substrate, wherein the substrate comprises a dielectric layer on a conductive layer, and wherein the graphene is deposited onto the dielectric layer; and patterning the graphene into multiple, evenly spaced graphene strips, wherein each of the graphene strips has a width of from about 50 nanometers to about 5 micrometers, and ranges therebetween, and wherein the graphene strips are separated from one another by a distance of from about 5 nanometers to about 50 micrometers, and ranges therebetween. Alternatively, bulk graphene may be employed and the dielectric layer is used to form periodic regions of differing permittivity. A testing apparatus and method of analyzing a sample using the present SPR sensors are also provided.Type: ApplicationFiled: June 24, 2014Publication date: December 24, 2015Inventors: Phaedon Avouris, Damon B. Farmer, Yilei Li, Hugen Yan
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Patent number: 9156655Abstract: A mining elevator traction cable connecting apparatus and a measuring method therefor, for use in a mining elevator serving a deep-mine. The apparatus includes an industrial personal computer (IPC), a signal collector connected to the IPC, multiple symmetrically arranged cable rings for use in connecting to one end of a traction cable, and a traction cable tension adjusting apparatus connected to the multiple of cable rings. Arranged within the traction cable tension adjusting apparatus are a plurality of hydraulic cylinders, and a plurality of draw wire displacement sensors for use in monitoring the relative displacement between each hydraulic cylinder plunger and a corresponding hydraulic cylinder body. The draw wire displacement sensors and an oil pressure sensor connected to a hydraulic pipeline are connected to the IPC via the signal collector, forming a traction cable tension and degree of adjustment measuring system.Type: GrantFiled: August 25, 2011Date of Patent: October 13, 2015Assignees: China University of Mining and Technology, Dongnan Elevator Co., Ltd.Inventors: Guohua Cao, Zhencai Zhu, Jiancong Qin, Hongqiao Kang, Guoan Chen, Chongqiu Wang, Renyuan Wu, Yongguang Cao, Junhui Wu, Yilei Li