Patents by Inventor Yuhua Hu
Yuhua Hu 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: 20240162805Abstract: In the present disclosure, the multi-level AC/DC conversion circuit and the multi-level DC/DC conversion circuit calculate the duty ratio of synchronous rectification switch according to the input voltage, the output voltage, the interval time of turning on the main switch, the switching cycle and the duty ratio of main switch, thereby eliminating the need for additional zero-current detecting function or zero-crossing detection circuit in conventional AC/DC conversion circuits. Accordingly, for the multi-level AC/DC conversion circuit and the multi-level DC/DC conversion circuit of the present disclosure, the cost is reduced, and the reliability is enhanced.Type: ApplicationFiled: September 25, 2023Publication date: May 16, 2024Inventors: Kai Dong, Yichao Wang, Yuhua Hu, Jinfa Zhang
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Publication number: 20240162834Abstract: A multi-level conversion circuit and a control method for flying capacitor voltage thereof are provided. In the multi-level conversion circuit, each flying capacitor is connected between a common connection node of the lower switches connected therewith and a common connection node of the upper switches connected therewith. The control method includes steps of: (a) determining the main switch and synchronous rectification switch of the lower and upper switches; (b) acquiring an adjustment value corresponding to each flying capacitor; (c) adjusting a duty ratio of the main switch according to the adjustment value corresponding to the flying capacitor connected therewith; and (d) when the multi-level conversion circuit working in a CCM, increasing a phase-shift angle between the main switches by an angle to make a peak value or a valley value of an inductor current remain unchanged before and after adjusting the duty ratio.Type: ApplicationFiled: September 25, 2023Publication date: May 16, 2024Inventors: Yichao Wang, Yuhua Hu, Kai Dong, Jinfa Zhang
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Publication number: 20240162818Abstract: A multi-level conversion circuit and a control method for flying capacitor voltage thereof are provided. In the multi-level conversion circuit, each flying capacitor is connected between a common connection node of the lower switches connected therewith and a common connection node of the upper switches connected therewith. When the conversion circuit works in a DCM, the control method includes steps of: (a) determining the main switch and synchronous rectification switch of the lower and upper switches; (b) acquiring an adjustment value corresponding to each flying capacitor; and (c) adjusting a duty ratio of the main switch according to the adjustment value corresponding to the flying capacitor connected therewith, wherein the adjustment trend of the duty ratio under D<(N?2)/(N?1) is opposite to that under (N?2)/(N?1)<D?1, and D is the duty ratio before the adjustment.Type: ApplicationFiled: September 25, 2023Publication date: May 16, 2024Inventors: Yichao Wang, Yuhua Hu, Kai Dong, Jinfa Zhang
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Publication number: 20240085514Abstract: Techniques are provided for utilizing reference signals transmitted by network stations to determine the orientation of a wireless node. An example method for determining an orientation of a user equipment includes determining a first location associated with the user equipment, determining a second location associated with a first wireless node, receiving, with the user equipment, a radio frequency signal transmitted from the first wireless node, determining two measurements based at least in part on the first location, the second location, and angle of arrival information associated with the radio frequency signal, determining a gravity vector based on inertial measurements obtained with the user equipment, and computing the orientation of the user equipment based at least in part on the gravity vector and the two measurements.Type: ApplicationFiled: September 9, 2022Publication date: March 14, 2024Inventors: Yuxiang PENG, Ning LUO, Yuhua HU
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Patent number: 11925977Abstract: A method for preparing aluminum foam sandwich material by rotating friction extrusion and electromagnetic pulse hybrid process includes: step 1: preparing the filler; step 2: processing the filler to prepare a plurality of preforms; step 3: clamping and fixing the plurality of preforms to form a preform assembly; step 4: welding the panel on the surface of the preform assembly to form an non-foaming sandwich material; step 5: heating and foaming the non-foaming sandwich material through a foaming mold; step 6: insulating the foaming mold after completion of foaming; injecting cooling water into the foaming mold after completion of insulation to maintain pressure and shape, forming the aluminum foam sandwich material of the required shape. The aluminum foam sandwich material produced by this method has good interface bonding, no adverse interface reaction, high bending resistance, impact resistance, and excellent sound absorption and insulation properties.Type: GrantFiled: April 19, 2023Date of Patent: March 12, 2024Assignee: NANCHANG HANGKONG UNIVERSITYInventors: Jilin Xie, Jinyang Hu, Yuhua Chen, Timing Zhang, Limeng Yin, Xiao Song, Shanlin Wang, Jiaming Ni
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Publication number: 20230292937Abstract: Provided is a hidden pull-out bracket, comprising a base and a supporting piece. The base comprises a recess, a first connecting piece and a second connecting piece. The recess is arranged on the base, a lower end of the first connecting piece is connected to an interior of the recess, and an upper end of the first connecting piece protrudes from the recess. The second connecting piece is connected to the upper end of the first connecting piece, and two sides of the second connecting piece are connected with limiting pieces. One end of the supporting piece is provided with a storage bucket, and an inner side of a side wall of the storage bucket is slidably connected to the second connecting piece. The other end of the supporting piece is connected with a fixing piece, and the fixing piece is used for fixing a mirror.Type: ApplicationFiled: June 10, 2022Publication date: September 21, 2023Inventors: Feng LI, Yuhua HU
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Patent number: 9448308Abstract: An implementation of a system, device and method for communicating location data of a mobile station, enhancing location data, optimally communicating Assistance Data, and/or reducing rebids of Measure Position Request messages in a wireless network.Type: GrantFiled: September 10, 2008Date of Patent: September 20, 2016Assignee: QUALCOMM IncorporatedInventors: Kirk Allan Burroughs, Yongjin Jiang, Liewei Tan, Thomas K. Rowland, Yuhua Hu
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Patent number: 9357473Abstract: Disclosed are a system, apparatus, and method for adaptive discovery and scanning of wireless access points. In one embodiment, a set of channels can be scanned in a first iteration to discover wireless access points. In one embodiment, a discovery profile based on the discovered wireless access points can be determined and in a second iteration, a subset of the set of channels can be scanned. In one embodiment, the subset consists of non-overlapping channels selected according to the discovery profile.Type: GrantFiled: March 12, 2013Date of Patent: May 31, 2016Assignee: QUALCOMM INCORPORATEDInventors: Jeemil N. Shah, Ashok Bhatia, Yuhua Hu, Gengsheng Zhang, Arie Rahmat
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Patent number: 9250080Abstract: Navigation solutions for a pedestrian or vehicle user are obtained by determining whether the direction and location of the user obtained from a map at least substantially conform to the direction and location of the user based on one or more measurements obtained from one or more sensors, and if the direction and location of the user obtained from the map at least substantially conform to the direction and location of the user based on one or more measurements obtained from one or more sensors, computing the navigation solutions based, at least in part, on the direction and location of the user.Type: GrantFiled: January 16, 2014Date of Patent: February 2, 2016Assignee: QUALCOMM IncorporatedInventors: William James Morrison, Wyatt Thomas Riley, Yuhua Hu
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Publication number: 20150204670Abstract: Navigation solutions for a pedestrian or vehicle user are obtained by determining whether the direction and location of the user obtained from a map at least substantially conform to the direction and location of the user based on one or more measurements obtained from one or more sensors, and if the direction and location of the user obtained from the map at least substantially conform to the direction and location of the user based on one or more measurements obtained from one or more sensors, computing the navigation solutions based, at least in part, on the direction and location of the user.Type: ApplicationFiled: January 16, 2014Publication date: July 23, 2015Applicant: QUALCOMM IncorporatedInventors: William James MORRISON, Wyatt Thomas RILEY, Yuhua HU
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Publication number: 20140274039Abstract: Disclosed are a system, apparatus, and method for adaptive discovery and scanning of wireless access points. In one embodiment, a set of channels can be scanned in a first iteration to discover wireless access points. In one embodiment, a discovery profile based on the discovered wireless access points can be determined and in a second iteration, a subset of the set of channels can be scanned. In one embodiment, the subset consists of non-overlapping channels selected according to the discovery profile.Type: ApplicationFiled: March 12, 2013Publication date: September 18, 2014Applicant: QUALCOMM INCORPORATEDInventors: Jeemil N. SHAH, Ashok BHATIA, Yuhua HU, Gengsheng ZHANG, Arie RAHMAT
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Publication number: 20140253386Abstract: Methods, apparatuses, and/or articles of manufacture are disclosed, which may be employed in a mobile device communicating with a transponder via a near field communications channel. In one example, round trip time of a message may be computed to estimate processing latency contributed by processes occurring within the mobile device and/or the transponder.Type: ApplicationFiled: March 11, 2013Publication date: September 11, 2014Applicant: QUALCOMM IncorporatedInventors: Ming Sun, Weihua Gao, Yuhua Hu, Gengsheng Zhang, Sai Pradeep Venkatraman
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Patent number: 8797209Abstract: An implementation of a system, device and method for communicating location data of a mobile station, enhancing location data, optimally communicating Assistance Data, and/or reducing rebids of Measure Position Request messages in a wireless network.Type: GrantFiled: September 10, 2008Date of Patent: August 5, 2014Assignee: QUALCOMM IncorporatedInventors: Kirk Allan Burroughs, Yongjin Jiang, Liewei Tan, Thomas K. Rowland, Yuhua Hu
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Publication number: 20090069032Abstract: An implementation of a system, device and method for communicating location data of a mobile station, enhancing location data, optimally communicating Assistance Data, and/or reducing rebids of Measure Position Request messages in a wireless network.Type: ApplicationFiled: September 10, 2008Publication date: March 12, 2009Applicant: QUALCOMM IncorporatedInventors: Thomas K. Rowland, Yongjin Jiang, Liewei Tan, Kirk Allan Burroughs, Yuhua Hu
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Publication number: 20090066571Abstract: An implementation of a system, device and method for communicating location data of a mobile station, enhancing location data, optimally communicating Assistance Data, and/or reducing rebids of Measure Position Request messages in a wireless network.Type: ApplicationFiled: September 10, 2008Publication date: March 12, 2009Applicant: QUALCOMM IncorporatedInventors: Kirk Allan Burroughs, Yongjin Jiang, Liewei Tan, Thomas K. Rowland, Yuhua Hu
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Publication number: 20090066564Abstract: An implementation of a system, device and method for communicating location data of a mobile station, enhancing location data, optimally communicating Assistance Data, and/or reducing rebids of Measure Position Request messages in a wireless network.Type: ApplicationFiled: September 10, 2008Publication date: March 12, 2009Applicant: QUALCOMM IncorporatedInventors: Kirk Allan Burroughs, Yongjin Jiang, Liewei Tan, Thomas K. Rowland, Yuhua Hu