Patents by Inventor Shuang Song

Shuang Song 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).

  • Patent number: 11159100
    Abstract: A modified modulated wave acquisition method includes: obtaining a modulated wave uaba; calculating a difference between the given value iNq* and the actual value iNq of the q-axis component of a grid side current, inputting the result to a proportional integral (PI) controller, and multiplying an output of the PI controller by cos ?t to obtain a modulated wave offset ?uaba; and calculating a difference between the modulated wave uaba and the modulated wave offset ?uaba to obtain a modified modulation wave uaba?, where ?t is a grid voltage phase in a sinusoidal case. The MPC method for a single-phase cascaded H-bridge rectifier includes: obtaining the modified modulated wave uaba?, where the component iNq* is 0; and replacing the modulated wave uaba with the modified modulated wave uaba? to perform MPC for the single-phase cascaded H-bridge rectifier.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: October 26, 2021
    Assignee: SOUTHWEST JIAOTONG UNIVERSITY
    Inventors: Xiaoyun Feng, Chenglin Xiong, Rong Mei, Shuang Song, Zhiwei Song, Lu Huang
  • Publication number: 20210276456
    Abstract: A virtual co-phase power supply system topology suitable for an electrical sectioning device at a sectioning and paralleling post (SP) includes a step-down transformer TR1. A primary winding of the step-down transformer TR1 is electrically connected to a traction feeding section ?2 in a train from a traction feeding section ?1 to the traction feeding section ?2. Each secondary winding is electrically connected to one rectifier separately. DC buses output from the rectifiers are connected in parallel. The other end of the DC bus is electrically connected to a plurality of parallel inverter units. An LC filter is provided on a DC bus between a rectifier unit and the inverter unit, and the LC filter is connected in parallel to an energy storage unit. After filtering through the LC filter, an output end of the inverter unit is electrically connected to a primary winding of a step-up transformer TR2.
    Type: Application
    Filed: September 15, 2020
    Publication date: September 9, 2021
    Applicant: Southwest Jiaotong University
    Inventors: Chenglin XIONG, Rong MEI, Shuang SONG, Zhiwei SONG, Lu HUANG
  • Publication number: 20210265921
    Abstract: A modified modulated wave acquisition method includes: obtaining a modulated wave uaba; calculating a difference between the given value iNq* and the actual value iNq of the q-axis component of a grid side current, inputting the result to a proportional integral (PI) controller, and multiplying an output of the PI controller by cos ?t to obtain a modulated wave offset ?uaba; and calculating a difference between the modulated wave uaba and the modulated wave offset ?uaba to obtain a modified modulation wave uaba?, where ?t is a grid voltage phase in a sinusoidal case. The MPC method for a single-phase cascaded H-bridge rectifier includes: obtaining the modified modulated wave uaba?, where the component iNq* is 0; and replacing the modulated wave uaba with the modified modulated wave uaba? to perform MPC for the single-phase cascaded H-bridge rectifier.
    Type: Application
    Filed: August 19, 2020
    Publication date: August 26, 2021
    Applicant: Southwest Jiaotong University
    Inventors: Xiaoyun FENG, Chenglin XIONG, Rong MEI, Shuang SONG, Zhiwei SONG, Lu HUANG
  • Publication number: 20210166020
    Abstract: The present invention discloses a method and an apparatus for extracting mountain landscape buildings based on high-resolution remote sensing images. The method comprises: segmenting a remote sensing image, and extracting non-vegetation areas from the remote sensing image by using NDVI; segmenting the non-vegetation areas, and extracting building areas by using NDBI; segmenting the building areas again, and calculating a normalized difference build shadow index NSBI of each patch; calculating NSBI separator of each patch in the non-vegetation areas and setting a separator threshold, and extracting landscape building areas based on the threshold. In the present invention, by introducing a near infrared band in the remote sensing image spectrum, in which there is a significant difference between shadows and non-shadows, the influence of large shadow areas in mountainous shady areas in the remote sensing image on the result of extraction is reduced.
    Type: Application
    Filed: January 21, 2021
    Publication date: June 3, 2021
    Inventors: Zhe LI, Yukun HE, Yuning CHENG, Xiang ZHOU, Kaiyu ZHAO, Xiao HAN, Feifei CHEN, Shuang SONG, Xinyi LU, Xiaoshan LIN
  • Publication number: 20200375484
    Abstract: A light-to-digital converter (2) comprises a light-to-current converter (10); a current integrator (4) with an integrator output (30) resettable to a baseline level; and a counter (18) with a digital output (26), wherein the light-to-current converter (10) is switchably connectable as a positive integration input to the current integrator (4), for, during a light-collecting phase (404-406), integrating a current from the light-to-current converter (10), the integrator output (30) starting from the baseline value and ending at a value to be digitized; a reference current source (14) is switchably connectable as a negative integration input to the current integrator (4), for, during a counting phase (406-408) subsequent to the light-collecting phase (404-406), integrating a reference current from the reference current source (14), the integrator output (30) starting from the value to be digitized and ending at the baseline value, the time spent integrating the reference current corresponding to the value to be
    Type: Application
    Filed: May 28, 2020
    Publication date: December 3, 2020
    Inventors: Qiuyang LIN, Jiawei XU, Shuang SONG, Nick VAN HELLEPUTTE, Filip TAVERNIER
  • Publication number: 20200187788
    Abstract: A device for read-out of a photoplethysmography (PPG) signal comprises: a photodiode, which is configured to detect a PPG signal, the photodiode comprising a first and a second terminal; and a read-out circuitry for reading out the PPG signal, wherein an input stage is connected to receive a first and a second input signal from the terminals and a DC bias voltage, and wherein the input stage is configured for current sensing to provide a fully differential amplification of the input signals to a first and a second current signal, and wherein an output stage is configured to receive the current signals, wherein the current signals comprise an AC and a DC component of the PPG signal, and wherein the output stage is configured to generate a differential output voltage through a gain component.
    Type: Application
    Filed: December 10, 2019
    Publication date: June 18, 2020
    Inventors: Shuang SONG, Jiawei XU, Roland Van WEGBERG, Nick Van HELLEPUTTE
  • Patent number: 10437648
    Abstract: A method, system and computer program product for load balancing of graph processing workloads. Synthetic proxy graphs are generated to characterize machines' graph processing speeds in a cluster. Each of the graph applications executing in the cluster is profiled using the synthetic graphs to form profiling sets. These formed profiling sets are run among the machines in the cluster to capture the machines' graph processing speeds. A metric for each of the graph applications is computed from a relative speedup among the machines in the cluster and/or the graph processing speeds. A graph file of a natural graph and a graph application are loaded. A metric out of the computed metrics is selected based on the graph application. The natural graph is then partitioned into multiple chunks which is distributed onto two or more machines in the cluster based on the selected metric and a user selected partitioning algorithm.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: October 8, 2019
    Assignee: Board of Regents, The University of Texas System
    Inventors: Lizy Kurian John, Shuang Song, Andreas Gerstlauer
  • Publication number: 20190192018
    Abstract: A method for time domain signal reconstruction for representing heart activity of a subject from a photoplethysmogram (PPG) signal comprises: receiving a PPG signal carrying information of heart activity of the subject; decomposing frequency information of the PPG signal into a plurality of components, each component having a frequency spectrum and a weight; for each component of the plurality of components: comparing the frequency spectrum of the component to a spectrum mask based on an estimate of heart rate of the subject; and adjusting the weight of the component based on the comparing; and reconstructing a time domain signal based on recombination of the plurality of components with adjusted weights.
    Type: Application
    Filed: October 29, 2018
    Publication date: June 27, 2019
    Inventors: Yifan Zhang, Willemijn Groenendaal, Shuang Song, Rik Vullings
  • Publication number: 20190192079
    Abstract: A system for motion artifact reduction in a photoplethysmogram, PPG, signal representing heart activity of a subject, comprises: a processing unit, said processing unit being configured to: receive a PPG signal carrying information of heart activity of the subject; receive a motion reference signal carrying information of a motion of the subject; form a PPG time-frequency representation, based on the PPG signal, and a motion reference time-frequency representation, based on the motion reference signal; and subtract a weighted representation of the motion reference time-frequency representation from the PPG time-frequency representation for reducing a motion artifact component in the PPG time-frequency representation and form a cleaned time-varying frequency spectrum of the PPG signal.
    Type: Application
    Filed: December 22, 2018
    Publication date: June 27, 2019
    Inventors: Willemijn GROENENDAAL, Yifan ZHANG, Shuang SONG, Rik VULLINGS
  • Publication number: 20180024869
    Abstract: A method, system and computer program product for load balancing of graph processing workloads. Synthetic proxy graphs are generated to characterize machines' graph processing speeds in a cluster. Each of the graph applications executing in the cluster is profiled using the synthetic graphs to form profiling sets. These formed profiling sets are run among the machines in the cluster to capture the machines' graph processing speeds. A metric for each of the graph applications is computed from a relative speedup among the machines in the cluster and/or the graph processing speeds. A graph file of a natural graph and a graph application are loaded. A metric out of the computed metrics is selected based on the graph application. The natural graph is then partitioned into multiple chunks which is distributed onto two or more machines in the cluster based on the selected metric and a user selected partitioning algorithm.
    Type: Application
    Filed: June 23, 2017
    Publication date: January 25, 2018
    Inventors: Lizy Kurian John, Shuang Song, Andreas Gerstlauer
  • Patent number: 9828653
    Abstract: Provided is a method for recycling a lead oxide-containing waste material, comprising: (1) contacting the lead oxide-containing waste material with a desulphurizer under desulphurization reaction conditions, and performing a solid-liquid separation on the mixture after contacting to obtain a filtrate and a filtration residue; (2) performing a conversion reaction on the above-mentioned filtration residue at a temperature of 350-750° C. so as to convert the lead-containing components in the filtration residue into lead oxide; (3) contacting the product obtained from step (2) with an alkaline solution so as to dissolve the PbO therein, and then performing a solid-liquid separation to obtain a PbO-alkaline solution; and (4) crystallizing the PbO-alkaline solution from step (3) to obtain PbO crystals and an alkaline filtrate. The method can reduce the energy consumption.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: November 28, 2017
    Assignee: CHILWEE POWER CO. LTD & BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Junqing Pan, Xiaowei Liu, Yanzhi Sun, Yongquan Ma, Yinjian Niu, Tixian Chen, Xuan Zhang, Xiaoxiang Cai, Shuang Song, Mingming Zhou, Longrui Zhou, Guoqing Cao, Xinxin Yang, Jianglin Wang, Xin Wu
  • Patent number: 9828654
    Abstract: Provided is a method for directly recovering lead oxide used for a lead-acid battery negative electrode from waste lead paste. The method comprises: (1) contacting waste lead paste with a barium-containing desulphurizer under desulphurization reaction conditions, and performing a solid-liquid separation on the mixture after contacting to obtain a filtrate and a filtration residue; and (2) performing a conversion reaction on the above-mentioned filtration residue at a temperature of 350-750° C. so as to convert the lead-containing components in the filtration residue into lead oxide. In the method, the direct recovery of a lead oxide raw material applicable to a lead-acid battery negative electrode from waste lead paste is achieved by quantitatively replenishing a barium sulphate additive in the process of desulphuration thereby substantially decreasing the recovery cost and energy consumption, and improving the comprehensive utilization of waste lead paste.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: November 28, 2017
    Assignee: CHILWEE POWER CO. LTD & BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Junqing Pan, Yongquan Ma, Yanzhi Sun, Xiaoxiang Cai, Yinjian Niu, Xiaowei Liu, Shuang Song, Tixian Chen, Guoqing Cao, Mingming Zhou, Xinxin Yang, Longrui Zhou, Yunfei Yang
  • Publication number: 20160160315
    Abstract: Provided is a method for recycling a lead oxide-containing waste material, comprising: (1) contacting the lead oxide-containing waste material with a desulphurizer under desulphurization reaction conditions, and performing a solid-liquid separation on the mixture after contacting to obtain a filtrate and a filtration residue; (2) performing a conversion reaction on the above-mentioned filtration residue at a temperature of 350-750° C. so as to convert the lead-containing components in the filtration residue into lead oxide; (3) contacting the product obtained from step (2) with an alkaline solution so as to dissolve the PbO therein, and then performing a solid-liquid separation to obtain a PbO-alkaline solution; and (4) crystallizing the PbO-alkaline solution from step (3) to obtain PbO crystals and an alkaline filtrate. The method can reduce the energy consumption.
    Type: Application
    Filed: May 27, 2014
    Publication date: June 9, 2016
    Inventors: Junqing Pan, Xiaowei Liu, Yanzhi Sun, Yongquan Ma, Yinjian Niu, Tixian Chen, Xuan Zhang, Xiaoxiang Cai, Shuang Song, Mingming Zhou, Longrui Zhou, Guoqing Cao, Xinxin Yang, Jianglin Wang, Xin Wu
  • Publication number: 20160160316
    Abstract: Provided is a method for directly recovering lead oxide used for a lead-acid battery negative electrode from waste lead paste. The method comprises: (1) contacting waste lead paste with a barium-containing desulphurizer under desulphurization reaction conditions, and performing a solid-liquid separation on the mixture after contacting to obtain a filtrate and a filtration residue; and (2) performing a conversion reaction on the above-mentioned filtration residue at a temperature of 350-750° C. so as to convert the lead-containing components in the filtration residue into lead oxide. In the method, the direct recovery of a lead oxide raw material applicable to a lead-acid battery negative electrode from waste lead paste is achieved by quantitatively replenishing a barium sulphate additive in the process of desulphuration thereby substantially decreasing the recovery cost and energy consumption, and improving the comprehensive utilization of waste lead paste.
    Type: Application
    Filed: May 27, 2014
    Publication date: June 9, 2016
    Inventors: Junqing Pan, Yongquan Ma, Yanzhi Sun, Xiaoxiang Cai, Yinjian Niu, Xiaowei Liu, Shuang Song, Tixian Chen, Guoqing Cao, Mingming Zhou, Xinxin Yang, Longrui Zhou, Yunfei Yang