Patents by Inventor Daqing Zhang
Daqing Zhang 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: 20240150497Abstract: Disclosed herein are detergent compositions that comprise at least one (i) glucan derivative and/or (ii) oxidized polysaccharide derivative. A glucan derivative of (i) can be substituted with at least one organic group that comprises a carboxylic acid group or a sulfonate group, and the degree of substitution (DoS) of the glucan derivative with the organic group can be about 0.1 to about 3.0. An oxidized polysaccharide derivative of (ii) can be produced by contacting a polysaccharide derivative under aqueous conditions with at least one agent that is capable of oxidizing the polysaccharide derivative. The polysaccharide derivative for oxidation has a degree of substitution (DoS) up to about 3.0 with at least one organic group. Further disclosed are various applications and products employing detergent compositions.Type: ApplicationFiled: February 17, 2022Publication date: May 9, 2024Inventors: ARJEN HOEKSTRA, SANDER BAS KLUIT, Zhengzheng HUANG, HELEN S. M. LU, DAQING ZHANG, GEERT VAN DER KRAAN
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Publication number: 20230141843Abstract: The present disclosure relates to a method, a system, a device and a storage medium for non-contact velocity estimation of a moving target. The method comprises the following steps: acquiring channel state information or other information that includes motion information of a moving target through at least two receiving devices, eliminating a random phase offset of the channel state information or other information to acquire newly constructed signals, and performing a denoising and filtering process on the newly constructed signals; identifying a motion state of the target according to the newly constructed signals, and dynamically selecting two optimal receiving devices if the target is moving; respectively extracting a Doppler frequency shift caused by the motion of the target from the two selected optimal receiving devices, and calculating a velocity of the moving target according to the Doppler frequency shifts.Type: ApplicationFiled: September 20, 2022Publication date: May 11, 2023Inventors: Daqing ZHANG, Kai NIU
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Publication number: 20210391908Abstract: A method and a system are for non-contact determination of a detection boundary. A Wi-Fi receiving device simultaneously receives data packets by using any two antennas, and measures channel state information; conjugate multiplication is performed on the CSI measured at a moment corresponding to reception of the two antennas, to obtain a new CSI signal stream; a time window with the length M is selected from the new CSI signal stream, and M CSI samples in the time window are collected, to form a conjugate set; the mean of the conjugate set is subtracted from all the samples in the conjugate set, to obtain a zero-mean conjugate set; N zero-mean conjugate sets are obtained for CSI on N sub-carriers simultaneously transmitted; and probability distribution fitting is performed on the absolute values of all elements in the N zero-mean conjugate sets, to calculate a boundary detection feature.Type: ApplicationFiled: June 10, 2021Publication date: December 16, 2021Inventors: Daqing ZHANG, Shengjie LI
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Patent number: 10630403Abstract: The present disclosure provides a method for determining a Doppler frequency shift of a wireless signal directly reflected by a moving object. An example method includes eliminating a random phase shift caused by non-synchronization between a wireless transmitting device and a wireless receiving device by using conjugate multiplication of the channel state information (CSI) on two antennas, thereby obtaining the complete Doppler frequency shift information from the phase information of the channel state information. The example method eliminates the effect on the Doppler frequency shift caused by frequency information of static paths in a manner of removing the mean, thereby obtaining an accurate frequency estimation of the moving object. A Multiple Signal Classification (MUSIC) algorithm may be used to estimate a frequency spectrum according to practical sampling intervals to avoid an effect on the frequency estimation accuracy caused by uneven sampling rate in a practical wireless transceiving system.Type: GrantFiled: July 13, 2018Date of Patent: April 21, 2020Assignee: Peking UniversityInventors: Daqing Zhang, Xiang Li
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Patent number: 10531817Abstract: The present invention relates to a fall detection method and system. The fall detection method comprises: receiving, by a first receiving antenna, a first WiFi signal stream propagating through an environment; receiving, by a second receiving antenna, a second WiFi signal stream propagating through the environment; determining a physical layer Channel State Information (CSI) stream, namely, a first CSI stream, of the first WiFi signal stream; determining a physical layer CSI stream, namely, a second CSI stream, of the second WiFi signal; determining a phase difference, namely, a CSI phase difference, between respective phase of the physical layer CSI stream of the first WiFi signal stream and the physical layer CSI stream of the second WiFi signal stream at the same time point, to form a CSI phase difference stream; and determining, according to the CSI streams and the CSI phase difference stream, a fall event.Type: GrantFiled: November 4, 2016Date of Patent: January 14, 2020Assignee: Peking UniversityInventors: Daqing Zhang, Hao Wang, Yasha Wang
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Publication number: 20190175074Abstract: The present invention relates to a fall detection method and system. The fall detection method comprises: receiving, by a first receiving antenna, a first WiFi signal stream propagating through an environment; receiving, by a second receiving antenna, a second WiFi signal stream propagating through the environment; determining a physical layer Channel State Information (CSI) stream, namely, a first CSI stream, of the first WiFi signal stream; determining a physical layer CSI stream, namely, a second CSI stream, of the second WiFi signal; determining a phase difference, namely, a CSI phase difference, between respective phase of the physical layer CSI stream of the first WiFi signal stream and the physical layer CSI stream of the second WiFi signal stream at the same time point, to form a CSI phase difference stream; and determining, according to the CSI streams and the CSI phase difference stream, a fall event.Type: ApplicationFiled: November 4, 2016Publication date: June 13, 2019Inventors: Daqing ZHANG, HAO WANG, Yasha WANG
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Publication number: 20190020425Abstract: The present disclosure provides a method for determining a Doppler frequency shift of a wireless signal directly reflected by a moving object. An example method includes eliminating a random phase shift caused by non-synchronization between a wireless transmitting device and a wireless receiving device by using conjugate multiplication of the channel state information (CSI) on two antennas, thereby obtaining the complete Doppler frequency shift information from the phase information of the channel state information. The example method eliminates the effect on the Doppler frequency shift caused by frequency information of static paths in a manner of removing the mean, thereby obtaining an accurate frequency estimation of the moving object. A Multiple Signal Classification (MUSIC) algorithm may be used to estimate a frequency spectrum according to practical sampling intervals to avoid an effect on the frequency estimation accuracy caused by uneven sampling rate in a practical wireless transceiving system.Type: ApplicationFiled: July 13, 2018Publication date: January 17, 2019Inventors: Daqing ZHANG, Xiang LI
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Patent number: 9815947Abstract: In a first aspect, a composition of matter includes a substantially symmetrical 3-arm star block copolymer having a central core and diblock copolymer arms having inner blocks and outer blocks. In a second aspect, an article includes a substrate, a block copolymer composition on the substrate, and a neutral layer between the substrate and the block copolymer composition.Type: GrantFiled: October 27, 2016Date of Patent: November 14, 2017Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: William Brown Farnham, Michael Thomas Sheehan, Hoang Vi Tran, Daqing Zhang
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Patent number: 9694356Abstract: This disclosure describes a method for regenerating a semi-regenerated reforming catalyst. The method comprises adjusting the reaction temperature to 250-480° C., introducing a sulfur-containing naphtha into the reforming reactor, or stopping introducing a feedstock into the reforming reactor, and introducing a sulfur-containing hydrogen into a recycle gas, until the sulfur content in the catalyst is 0.32-0.8 mass %, then the catalyst is subject to coke-burning, oxychlorination and reduction. Alternatively, the method first subjects the spent catalyst to coke-burning followed by introducing sulfate ions thereinto; and then performing oxychlorination and reduction. Disclosed is still another method for regenerating a platinum-rhenium reforming catalyst, which comprises coke-burning the spent catalyst; introducing sulfur and chlorine in the catalyst by impregnation; and then drying, calcinating and reducing.Type: GrantFiled: March 25, 2016Date of Patent: July 4, 2017Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPECInventors: Daqing Zhang, Gaoshan Zang, Yuhong Zhang, Jiaxin Wang, Tao Wang
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Publication number: 20170121468Abstract: In a first aspect, a composition of matter includes a substantially symmetrical 3-arm star block copolymer having a central core and diblock copolymer arms having inner blocks and outer blocks. In a second aspect, an article includes a substrate, a block copolymer composition on the substrate, and a neutral layer between the substrate and the block copolymer composition.Type: ApplicationFiled: October 27, 2016Publication date: May 4, 2017Inventors: William Brown Farnham, Michael Thomas Sheehan, Hoang Vi Tran, Daqing Zhang
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Patent number: 9623403Abstract: A naphtha reforming catalyst, comprising an alumina support and following components with the content calculated on the basis of the support: VIII group metal 0.1-2.0% by weight, VIIB group metal 0.1-3.0% by weight, sulfate ion 0.45-3.0% by weight, and halogen 0.5-3.0% by weight. The catalyst is used in a naphtha reforming reaction without presulfurization and has a high aromatization activity and a selectivity.Type: GrantFiled: August 20, 2015Date of Patent: April 18, 2017Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPECInventors: Daqing Zhang, Gaoshan Zang, Yuhong Zhang, Jiaxin Wang, Tao Wang
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Patent number: 9614648Abstract: A method and apparatus for controlling energy expended by sensor network nodes is disclosed. The method comprises steps of acquiring energy information that is indicative of an energy status of a node in the network and adjusting at least one data transmission parameter according to the energy information. In a wireless network where the communication capacity and power energy of sensor nodes are limited, the invention provides the capability of efficiently utilizing the network resources, conserving power consumption of sensor nodes, and prolonging the life of the sensor network.Type: GrantFiled: April 19, 2007Date of Patent: April 4, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Daqing Zhang, Ningjiang Chen, Jin Wang
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Publication number: 20160279626Abstract: A method for regenerating semi-regenerated reforming catalyst comprises adjusting the reaction temperature to 250-480° C.; introducing sulfur-containing naphtha into the reforming reactor, so that the sulfur content in the catalyst is 0.32-0.8 mass %; then stopping introducing the raw materials into the reforming reactor; subjecting the catalyst to coke-burning, oxychlorination and reduction. Another method for regenerating semi-regenerated reforming catalyst comprises coke-burning the spent catalyst; introducing sulfate ions thereinto; then performing oxychlorination and reduction. There is still another method for regenerating a platinum-rhenium reforming catalyst, comprising coke-burning the spent catalyst; introducing sulfur and chlorine by impregnation; then drying, calcinating and reducing. The catalysts regenerated by said methods can be used without presulfurization and have excellent regeneration performance.Type: ApplicationFiled: March 25, 2016Publication date: September 29, 2016Inventors: Daqing ZHANG, Gaoshan ZANG, Yuhong ZHANG, Jiaxin WANG, Tao WANG
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Patent number: 9422949Abstract: An energy-recovery generation system for a handling and carrying electric vehicle, comprising a hoisting cylinder (9), wherein an output pipeline of the hoisting cylinder (9) is provided with a pressure sensor unit (1) and a directional valve (2); the directional valve (2) is under the control of the pressure sensor unit (1); a first outlet of the directional valve (2) is connected to a tank (5) through a way of a multi-way valve (4) with an operating handle; the pressure oil, flowing out from a second outlet of the directional valve (2), passes through a pump (7) having an oil suction port capable of bearing pressure or a motor, and then passes through the multi-way valve (4), to finally flow back to the tank (5); the pump (7) having an oil suction port capable of bearing pressure or the motor drives an electric motor (16) to output electric energy; an electric energy output end of the electric motor (16) is connected to an energy storage device (20) through a converter (21).Type: GrantFiled: November 30, 2011Date of Patent: August 23, 2016Assignee: SUNWARD INTELLIGENT EQUIPMENT CO., LTD.Inventors: Qinghua He, Zhongyong Tang, Daqing Zhang, Zheng Chen, Jun Gong
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Publication number: 20160051969Abstract: A naphtha reforming catalyst, comprising an alumina support and following components with the content calculated on the basis of the support: VIII group metal 0.1-2.0% by weight, VIM group metal 0.1-3.0% by weight, sulfate ion 0.45-3.0% by weight, and halogen 0.5-3.0% by weight. The catalyst is used in a naphtha reforming reaction without presulfurization and has a high aromatization activity and a selectivity.Type: ApplicationFiled: August 20, 2015Publication date: February 25, 2016Inventors: Daqing ZHANG, Gaoshan ZANG, Yuhong ZHANG, Jiaxin WANG, Tao WANG
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Publication number: 20130283776Abstract: An energy-recovery generation system for a handling and carrying electric vehicle, comprising a hoisting cylinder (9), wherein an output pipeline of the hoisting cylinder (9) is provided with a pressure sensor unit (1) and a directional valve (2); the directional valve (2) is under the control of the pressure sensor unit (1); a first outlet of the directional valve (2) is connected to a tank (5) through a way of a multi-way valve (4) with an operating handle; the pressure oil, flowing out from a second outlet of the directional valve (2), passes through a pump (7) having an oil suction port capable of bearing pressure or a motor, and then passes through the multi-way valve (4), to finally flow back to the tank (5); the pump (7) having an oil suction port capable of bearing pressure or the motor drives an electric motor (16) to output electric energy; an electric energy output end of the electric motor (16) is connected to an energy storage device (20) through a converter (21).Type: ApplicationFiled: November 30, 2011Publication date: October 31, 2013Applicant: Sunward Intelligent Equipment Co., Ltd.Inventors: Qinghua He, Zhongyong Tang, Daqing Zhang, Zheng Chen, Jun Gong
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Patent number: 7905516Abstract: An airbag module integrates the components required for gas generation, thereby eliminating the need for a separate inflation component. The airbag module can comprise a cover with a pocket, a gas generant container, an inflatable cushion an upper and lower retainer housing, and an inflation gas generation system in fluid communication with the cushion. The airbag module does not comprise a discrete inflator that is functional outside the assembled airbag module. The gas generant container houses a package of solid gas generating compound. The energetic materials of the propellant do not become functional as a gas generation source until the cover is secured to the lower retainer housing.Type: GrantFiled: May 18, 2007Date of Patent: March 15, 2011Assignee: TK Holdings Inc.Inventors: William E. Bostick, James P. Karlow, Dave McCormick, Barney Bauer, Henk B. Helleman, Simin Zeng, Daqing Zhang, Hideki Mizuno
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Publication number: 20100138723Abstract: The present invention provides an error correction method and apparatus, and also an optical disc playback method and apparatus. The error correction method in the present invention is used to perform error correction on data read from an optical disc, comprising: obtaining the error detection information of a block corresponding to the read data; determining data error type in a data stream unit derived from the block according the error detection information; according to the data error type and predefined reference error type, judging whether to reserve the data stream unit for optical disc playback. By using the error detection information of the block which is decarded by using the existing technologies, the player can perform further error correction to try to avoid data errors which may produce interruption during optical disc playback.Type: ApplicationFiled: May 31, 2006Publication date: June 3, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Jin Wang, Daqing Zhang
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Patent number: 7685527Abstract: Embodiments of an apparatus, method, and article of manufacture for controlling view navigation in a workflow environment are disclosed herein. View navigation is controlled by incorporating and utilizing a user-interact operation in a workflow editing application. A workflow process designer may define the user-interact operation from one or more pre-designed views provided for the particular business objectives associated with the workflow process. In one embodiment, users may be navigated to specific views to gather information necessary to the completion of the workflow process, or to facilitate the processing of information across the workflow process to accomplish the business objectives embodied in the workflow process.Type: GrantFiled: September 3, 2002Date of Patent: March 23, 2010Assignee: Siebel Systems, Inc.Inventors: Heung-Wah Yan, Daqing Zhang, Duane Wandless
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Publication number: 20090185542Abstract: Present invention is to provide a method and apparatus for controlling energy expanding of sensor network nodes, wherein the method comprises steps of: acquiring energy information, said energy information being indicative of an energy status of a node in the network; and adjusting at least one data transmission parameter accordingly based on the energy information. With present invention, on the premise that the communication capacity and power energy of sensor nodes are limited in a wireless sensor network, it is capable of efficiently utilize the network resource, save the power consumption of sensor node, and prolong the whole life of sensor network.Type: ApplicationFiled: April 19, 2007Publication date: July 23, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Daqing Zhang, Ningjiang Chen, Jin Wang