Patents by Inventor Yifan Zhao
Yifan Zhao 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: 20230259972Abstract: Devices, systems, and methods for allocating consumer communications can include obtaining consumer activity data, designating a number of consumer communication campaigns concerning consumer features based on the consumer activity data, entering consumer activity data as inputs to one machine learning model for each determined consumer communication campaign, each machine learning model configured determine a campaign consumer activation profile based on the entered consumer activity data, and assigning the consumer communication campaigns to consumers based on the determined campaign consumer activation profiles.Type: ApplicationFiled: February 10, 2023Publication date: August 17, 2023Inventors: Yao XIE, Anupriya AGRAWAL, Ann EHNERT, Chace MACMULLAN, Colin LLOYD, Thomas E. HENRY, JR., Yifan ZHAO
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Publication number: 20230246295Abstract: The present disclosure provides a coated separator including a porous separator and a ceramic coating disposed on one or more surfaces thereof. The ceramic coating includes a ceramic material and an additive selected from the group consisting of: lithium nitrate (LiNO3), lithium phosphate (LiPO3), lithium orthophosphate (Li3PO4), lithium difluoro (oxalate) borate (LiDBoB), cyclic sulfone, polysulfide, lithium halide salts, and combinations thereof. In certain variations, the coated separator is prepared by contacting the porous separator with a slurry including the ceramic material and the additive. In other variations, the coated separator is prepared by forming a ceramic coating on one or more surfaces of a porous separator and contacting the porous separator with the additive, for example by immersing, or alternatively, a spraying process.Type: ApplicationFiled: January 31, 2022Publication date: August 3, 2023Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Xingcheng XIAO, Yifan ZHAO, Biqiong WANG, Shuru CHEN, Mei CAI
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Publication number: 20230231135Abstract: An electrode includes an electroactive material layer and a protective layer disposed on or adjacent to a surface of the electroactive material layer. The protective layer includes a polymerized cyclic ether and a salt dispersed therewithin. The salt includes a nitrate salt and a phosphate salt. The salt may also include a Lewis acid salt. The protective layer is formed by disposing a solution, including the salt and solvent, on or adjacent to the surface of the electroactive material layer, and polymerizing the solvent. The solvent includes the cyclic ether, and also, one or more organic phosphates.Type: ApplicationFiled: January 18, 2022Publication date: July 20, 2023Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Yifan ZHAO, Xingcheng XIAO, Shuru CHEN, Mei CAI
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Publication number: 20220382553Abstract: Embodiments of the present disclosure provides a fine-grained image recognition method and apparatus using graph structure represented high-order relation discovery, wherein the method includes: inputting an image to be classified into a convolutional neural network feature extractor with multiple stages, extracting two layers of network feature graphs in the last stage, constructing a hybrid high-order attention module according to the network feature graphs, and forming a high-order feature vector pool according to the hybrid high-order attention module, using each vector in the vector pool as a node, and utilizing semantic similarity among high-order features to form representative vector nodes in groups, and performing global pooling on the representative vector nodes to obtain classification vectors, and obtaining a fine-grained classification result through a fully connected layer and a classifier based on the classification vectors.Type: ApplicationFiled: December 9, 2021Publication date: December 1, 2022Inventors: JIA LI, YIFAN ZHAO, DINGFENG SHI, QINPING ZHAO
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Publication number: 20220286543Abstract: A mobile phone may include a housing, a battery at least partially within the housing, and a circuit board assembly at least partially within the housing and positioned along a side of the battery. The circuit board assembly may include a first circuit board defining a first hole, a second circuit board defining a second hole, a wall structure between the first circuit board and the second circuit board and attached to an inner surface of the first circuit board and an inner surface of the second circuit board, and a fastener assembly configured to retain the first circuit board to the second circuit board.Type: ApplicationFiled: September 10, 2021Publication date: September 8, 2022Inventors: Owen D. Hale, Dale T. Morgan, Andrew U. Leopold, Yifan Zhao, Nicholas Merz, Daniel Jarvis, James B. Smith, Macey E. Dade, Samuel J. Pliska, Ethan R. Stobbe, Cameron Bauer, Ian A. Spraggs, Marwan Rammah, Bryan D. Keen, David A. Pakula
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Publication number: 20220153282Abstract: Aspects of the present disclosure relate to a control system, a system, a method, a vehicle and a non-transitory computer readable medium for receiving user movement data indicative of movement of a user's head; receiving object movement data indicative of movement of an object, the object being associated with a non-driving task; determining one or more relative movement parameters indicative of the relative movement of the user's head with respect to the object based at least in part on the received user movement data and the object movement data; and determining an attention level of the user to the non-driving task in based at least in part on the determined relative movement parameter.Type: ApplicationFiled: April 2, 2020Publication date: May 19, 2022Inventors: Rebecca MATTHIAS, Lee SKRYPCHUK, Alexandros MOUZAKITIS, Yifan ZHAO, Xiangjun PENG, Chen LV
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Patent number: 10740897Abstract: Embodiments of the present invention provide a method and a device for three-dimensional feature-embedded image object component-level semantic segmentation, the method includes: acquiring three-dimensional feature information of a target two-dimensional image; performing a component-level semantic segmentation on the target two-dimensional image according to the three-dimensional feature information of the target two-dimensional image and two-dimensional feature information of the target two-dimensional image. In the technical solution of the present application, not only the two-dimensional feature information of the image but also the three-dimensional feature information of the image are taken into consideration when performing the component-level semantic segmentation on the image, thereby improving the accuracy of the image component-level semantic segmentation.Type: GrantFiled: January 15, 2018Date of Patent: August 11, 2020Assignee: BEIHANG UNIVERSITYInventors: Xiaowu Chen, Jia Li, Yafei Song, Yifan Zhao, Qinping Zhao
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Publication number: 20190171957Abstract: A method, a system, and an article are provided for determining a lifetime value of a user of a client application. An example method includes: obtaining data including a history of interactions between a plurality of users and a client application on a plurality of respective client devices; developing, using the data, a first model to predict a likelihood that a new user of the client application will be a payer; developing, using the data, a second model to predict an amount of revenue generated by the new user of the client application; providing the client application to a plurality of new users; using the first model and the second model to predict the likelihood and the revenue for each new user in the plurality of new users; and adjusting, based on the predicted likelihood and the predicted revenue, a method of acquiring additional users of the client application.Type: ApplicationFiled: December 4, 2018Publication date: June 6, 2019Inventors: Wei Yang, Yifan Zhao, Doug Loyer, Arun Kejariwal
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Publication number: 20190080455Abstract: Embodiments of the present invention provide a method and a device for three-dimensional feature-embedded image object component-level semantic segmentation, the method includes: acquiring three-dimensional feature information of a target two-dimensional image; performing a component-level semantic segmentation on the target two-dimensional image according to the three-dimensional feature information of the target two-dimensional image and two-dimensional feature information of the target two-dimensional image. In the technical solution of the present application, not only the two-dimensional feature information of the image but also the three-dimensional feature information of the image are taken into consideration when performing the component-level semantic segmentation on the image, thereby improving the accuracy of the image component-level semantic segmentation.Type: ApplicationFiled: January 15, 2018Publication date: March 14, 2019Inventors: XIAOWU CHEN, JIA LI, YAFEI SONG, YIFAN ZHAO, QINPING ZHAO
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Patent number: 8687362Abstract: A portable briefcase office comprises of a computer unit, a storage unit, and a supplies and devices unit. It integrates a computer, printer, projector, storage space, battery, and other office supplies in one easily transported briefcase. It is not a case for devices, but a compact apparatus that incorporates these devices as it would appear in an entire office.Type: GrantFiled: May 2, 2012Date of Patent: April 1, 2014Inventor: Yifan Zhao
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Publication number: 20130294021Abstract: A portable briefcase office comprises of a computer unit, a storage unit, and a supplies and devices unit. It integrates a computer, printer, projector, storage space, battery, and other office supplies in one easily transported briefcase. It is not a case for devices, but a compact apparatus that incorporates these devices as it would appear in an entire office.Type: ApplicationFiled: May 2, 2012Publication date: November 7, 2013Inventor: Yifan Zhao
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Patent number: 7190145Abstract: A method and apparatus for improving speed measurement quality in systems having multi-pole machines is taught. The method compensates for pole misalignment by computing speed based upon moving average techniques. In one embodiment, a moving average speed averaged over a complete interval of rotation is determined, based upon measurements of one or more magnetic pole position sensors for magnetic pole location. In another embodiment, a time interval between two poles is averaged over one or more rotational periods, and the average time interval is used to determine the moving average speed. Computation of the moving average speed reduces errors in speed measurements due to pole misalignment and may provide for smaller control adjustment times for controlling motor speed variability. In one embodiment, the speed measurement system includes a multi-pole rotor, and a controller having a capture timer and a buffer.Type: GrantFiled: December 30, 2002Date of Patent: March 13, 2007Assignee: Ballard Power Systems CorporationInventors: Kerry E. Grand, Richard J. Hampo, Yifan Zhao
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Patent number: 7024290Abstract: A system and method for actively damping driveline oscillations in a motor vehicle having a traction motor to drive a vehicle's drive wheels and an antilock brake system (ABS). A traction motor controller controls a torque output signal of the motor to effectively to dampen driveline oscillations during an ABS operation. A proportional, a proportional derivative, or a derivative controller may be used to generate the torque output signal based on at least one of motor speed, an average of the drive wheel speeds, a difference in the two speeds, a motor angular acceleration, an average wheel angular acceleration, and a difference in the angular accelerations. Motor speed signals and average drive wheel speed signals may be filtered to eliminate high frequency components of each speed signal. Additionally, amplitude of the torque output signal may be limited within a positive upper and a negative lower active motor damping limit.Type: GrantFiled: July 30, 2004Date of Patent: April 4, 2006Assignee: Ford Global Technologies, LLCInventors: Yifan Zhao, Michael Schneider, Dale Crombez
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Publication number: 20060025905Abstract: A system and method for actively damping driveline oscillations in a motor vehicle having a traction motor to drive a vehicle's drive wheels and an antilock brake system (ABS). A traction motor controller controls a torque output signal of the motor to effectively to dampen driveline oscillations during an ABS operation. A proportional, a proportional derivative, or a derivative controller may be used to generate the torque output signal based on at least one of motor speed, an average of the drive wheel speeds, a difference in the two speeds, a motor angular acceleration, an average wheel angular acceleration, and a difference in the angular accelerations. Motor speed signals and average drive wheel speed signals may be filtered to eliminate high frequency components of each speed signal. Additionally, amplitude of the torque output signal may be limited within a positive upper and a negative lower active motor damping limit.Type: ApplicationFiled: July 30, 2004Publication date: February 2, 2006Inventors: Yifan Zhao, Michael Schneider, Dale Crombez
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Patent number: 6700342Abstract: A control system for a permanent magnet motor having low-resolution speed measurement is taught. The control system is comprised of a speed regulator, voltage regulator and current regulator. The speed regulator uses a speed command and a measured speed for calculating a desired motor voltage; the voltage regulator uses a voltage command and an applied motor voltage for calculating a motor current command; and the current regulator uses a current command and a motor phase current for calculating a desired motor voltage for use by said voltage regulator; thereby providing a low resolution speed measurement to be used in a high performance application.Type: GrantFiled: July 29, 2002Date of Patent: March 2, 2004Assignee: Ballard Power Systems CorporationInventors: Richard J. Hampo, Yifan Zhao
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Publication number: 20030164692Abstract: A method and apparatus for improving the speed measurement quality in systems having multi-pole machines is taught. The method compensates for pole misalignment by moving average techniques.Type: ApplicationFiled: December 30, 2002Publication date: September 4, 2003Applicant: Ballard Power Systems CorporationInventors: Kerry E. Grand, Richard J. Hampo, Yifan Zhao
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Publication number: 20030030395Abstract: A control system for a permanent magnet motor having low-resolution speed measurement is taught. The control system is comprised of a speed regulator, voltage regulator and current regulator. The speed regulator uses a speed command and a measured speed for calculating a desired motor voltage; the voltage regulator uses a voltage command and an applied motor voltage for calculating a motor current command; and the current regulator uses a current command and a motor phase current for calculating a desired motor voltage for use by said voltage regulator; thereby providing a low resolution speed measurement to be used in a high performance application.Type: ApplicationFiled: July 29, 2002Publication date: February 13, 2003Applicant: Ballard Power Systems CorporationInventors: Richard J. Hampo, Yifan Zhao
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Patent number: 6366049Abstract: A speed controller circuit for a motor including a ramp function generator having a first input connected to a source of a speed demand signal and a second input connected to a ramp step signal. The ramp function generator develops a frequency ramp that has a slope is initiated by the speed demand signal which is adjusted in response to the ramp step signal. The ramp function generator also provides a frequency signal wherein the ramp function increases or decreases the frequency according to the speed demand. A V/F circuit to the ramp function generator and a space vector modulation circuit are connected to the V/F circuit. The output of the space vector modulation circuit is applied through power switching devices to the motor for speed control. A PI controller circuit is connected to a motor current feedback signal and to a maximum current signal, which provides the current limit of the control system.Type: GrantFiled: May 10, 2000Date of Patent: April 2, 2002Assignee: Ecostar Electric Drive Systems L.L.C.Inventors: Li Chen, Richard Joseph Hampo, Yifan Zhao
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Patent number: 6058031Abstract: A high power motor drive converter includes: a five level hybrid NPC output power conversion stage including three NPC phase bridges having switches and coupled in a wye configuration through a converter neutral point, each NPC phase bridge receiving power on a respective direct current bus; three isolated split series-connected DC capacitor banks each coupled in parallel to a respective one of the three NPC phase bridges; and a controller for selecting switch positions with active control of neutral voltages. The controller is adapted to select switch positions using feedforward sine-triangle modulation with third harmonic injection, zero sequence injection, and/or discontinuous modulation injection.Type: GrantFiled: June 30, 1998Date of Patent: May 2, 2000Assignee: General Electric CompanyInventors: James Patrick Lyons, Vlatko Vlatkovic, Paul Martin Espelage, Albert Andreas Maria Esser, Yifan Zhao, Fei Fred Wang, Sr.