Patents by Inventor Zhengwei Liu

Zhengwei Liu 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).

  • Publication number: 20170306505
    Abstract: Pitting corrosion of stainless steel occurs in solutions of organic acid, such as tartaric acid, in an electrolyte solution with methanol. However, methanolic solutions containing at least one organic halide and at least one organic hydroxyacid and some water provide reduced pitting corrosion of stainless steel. The organic hydroxyacid may be a hydroxy acid containing 2 to 10 carbon atoms with at least one hydroxyl group and at least one carboxylic acid group, in a non-limiting example, glycolic acid. The pH of the methanolic solution may range from about 3.5 to about 8.
    Type: Application
    Filed: July 8, 2017
    Publication date: October 26, 2017
    Applicant: Baker Hughes, a GE company, LLC
    Inventors: Zhengwei Liu, Sunder Ramachandran, Vaithilingam Panchalingam, Timothy Z. Garza, Paul Robert Stead, Stuart Edward Cook, Gordon T. Rivers, Vu Thieu, Heather McEachern
  • Patent number: 9732430
    Abstract: Pitting corrosion of stainless steel occurs in solutions of organic acid, such as tartaric acid, in an electrolyte solution with methanol. However, methanolic solutions containing at least one organic halide and at least one organic hydroxyacid and some water provide reduced pitting corrosion of stainless steel. The organic hydroxyacid may be a hydroxy acid containing 2 to 10 carbon atoms with at least one hydroxyl group and at least one carboxylic acid group, in a non-limiting example, glycolic acid. The pH of the methanolic solution may range from about 3.5 to about 8.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: August 15, 2017
    Assignee: Baker Hughes Incorporated
    Inventors: Zhengwei Liu, Sunder Ramachandran, Vaithilingam Panchalingam, Timothy Z. Garza, Paul Robert Stead, Stuart Edward Cook, Gordon T. Rivers, Vu Thieu, Heather McEachern
  • Publication number: 20170152604
    Abstract: Corrosion to a metal surface in contact with corrosion forming components within an aqueous-based fluid system may be decreased, prevented, and/or inhibited by contacting the metal surface(s) with apatite forming components and forming at least one apatite species on the surface with the apatite forming components. The apatite forming components may be or include phosphates, organophosphates and combinations thereof. In a non-limiting embodiment, the apatite forming components may further include fluorides, chlorides, calcium, and combinations thereof.
    Type: Application
    Filed: November 17, 2016
    Publication date: June 1, 2017
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Zhengwei Liu, Tracey Jackson, Richard Martin
  • Publication number: 20170110627
    Abstract: A non-polar blue light LED epitaxial wafer based on an LAO substrate comprises the LAO substrate, and a buffer layer, a first non-doped layer, a first doped layer, a quantum well layer, an electron barrier layer and a second doped layer that are sequentially arranged on the LAO substrate. A preparation method of the non-polar blue light LED epitaxial wafer includes: a) adopting the LAO substrate, selecting a crystal orientation, and cleaning a surface of the LAO substrate; b) annealing the LAO substrate, and forming an AlN seed crystal layer on the surface of the LAO substrate; and c) sequentially forming a non-polar m face GaN buffer layer, a non-polar non-doped u-GaN layer, a non-polar n-type doped GaN film, a non-polar InGaN/GaN quantum well, a non-polar m face AlGaN electron barrier layer and a non-polar p-type doped GaN film on the LAO substrate by adopting metal organic chemical vapor deposition.
    Type: Application
    Filed: March 23, 2015
    Publication date: April 20, 2017
    Applicant: SHANGHAI CHIPTEK SEMICONDUCTOR TECHNOLOGY CO., LTD.
    Inventors: Zhuoran CAI, Hai GAO, Zhi LIU, Xianglin YIN, Zhengwei LIU
  • Publication number: 20160362598
    Abstract: A corrosion inhibitor additive may be circulated in a subterranean formation in an effective amount to decrease metal corrosion in a high temperature environment. The corrosion inhibitor additive may include at least one first inhibitor and at least one second inhibitor. The second inhibitor(s) may include imidazolines, quaternary amines, phosphate esters, and combinations thereof. The first inhibitor(s) may have one of the following formulas: wherein x is oxygen or hydrogenated nitrogen or quaternized nitrogen; R1, R2, R3 and R4 are independently hydrogen, methyl or an alkyl group; p, q and n are integers from 1 to 100; and SH—CH2—[CH2—O—CH2]z—CH2—SH ??(A1) where z is an integer ranging from 1 to 100.
    Type: Application
    Filed: June 6, 2016
    Publication date: December 15, 2016
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Zhengwei Liu, Tracey Spann Jackson, Sunder Ramachandran
  • Publication number: 20160360420
    Abstract: Techniques and apparatuses for wireless communication are described herein. According to some possible aspects, a base station may determine a random number to be used in association with performing a clear channel assessment (CCA) in a licensed assisted access (LAA) network. The base station may determine the random number in coordination with one or more other random numbers determined by one or more other base stations. The base station may determine, based on the random number, a time to perform the CCA to reduce or prevent conflicts with the one or more other base stations.
    Type: Application
    Filed: June 2, 2016
    Publication date: December 8, 2016
    Inventors: Zhengwei LIU, Xiaoxia Zhang, Jordan Kulcsar
  • Publication number: 20160353474
    Abstract: Techniques are described for wireless communication. A first method may include classifying feedback received for a first downlink transmission over a shared radio frequency spectrum band; identifying an interference parameter for a subsequent downlink transmission; and scheduling the subsequent downlink transmission based at least in part on feedback classified in a feedback category associated with the identified interference parameter for the subsequent downlink transmission. The feedback may be classified in one of a plurality of feedback categories, and the classifying may be based at least in part on an interference parameter for the first downlink transmission. A second method may include identifying an interference parameter for a first downlink transmission received over a shared radio frequency spectrum band; generating feedback for the first downlink transmission; and sending, to a base station, the feedback along with an indication of the interference parameter.
    Type: Application
    Filed: May 25, 2016
    Publication date: December 1, 2016
    Inventors: Xiaoxia Zhang, Tao Luo, Arumugam Chendamarai Kannan, Zhengwei Liu
  • Publication number: 20160323915
    Abstract: Additional improvements to the design of enhanced physical random access channel (ePRACH) procedures are disclosed for communications systems having contention-based shared spectrum including unlicensed frequency bands. The additional improvements address the uncertainty of transmission in listen before talk (LBT)-based communications and cooperation with other radio access technologies competing for the same frequency spectrum.
    Type: Application
    Filed: February 22, 2016
    Publication date: November 3, 2016
    Inventors: Zhengwei Liu, Xiaoxia Zhang, Wanshi Chen, Siddhartha Mallik, Aleksandar Damnjanovic, Onkar Jayant Dabeer
  • Patent number: 9307017
    Abstract: A member-oriented hybrid cloud operating system architecture and a communication method thereof are provided. A hybrid architecture is established based on layer, object and message models, and a member-oriented idea is applied to manage constituent members and a processing environment thereof. On this basis, high-efficient routing, read-write separation and load balancing are performed on a member processing cluster, satisfying the requirements of being open and compatible, loosely coupled and extensible of a cloud operating system, and solving the self-management problem, the horizontal scaling problem of members and the high-availability problem of stateful members of the existing cloud operating system.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: April 5, 2016
    Assignee: INSPUR ELECTRONIC INFORMATION INDUSTRY CO., LTD
    Inventors: Endong Wang, Dong Zhang, Zhengwei Liu, Kaiyuan Qi, Junpeng Liu, Feng Guo, Chenping Liu, Fei Gao, Bo Zhu
  • Publication number: 20160007321
    Abstract: Transfer of Multimedia Broadcast/Multicast Services (MBMS) over a Single Frequency Network (MBSFN) service and idle mode unicast service for a mobile entity from a source base station to a target base station may be managed by a base station or mobile entity of a cellular wireless communications system (WCS). Operations related to the transfer may include obtaining an MBMS status of the mobile entity, and/or obtaining MBMS support information for the base station. A network entity may facilitate MBMS discovery by a mobile entity, by transmitting a data element to the mobile entity including service identifiers mapped to corresponding cell identifiers to indicate respective MBMS services to be broadcast in an WCS area on adjacent cells identified by respective ones of the cell identifiers. The MBMS services may be broadcast within the WCS area using the adjacent cells previously indicated in the data element.
    Type: Application
    Filed: August 27, 2015
    Publication date: January 7, 2016
    Inventors: Xiaoxia Zhang, Jun Wang, Zhengwei Liu, Andrea Garavaglia, Kuo-Chun Lee, George Cherian
  • Publication number: 20150373638
    Abstract: Transfer of Multimedia Broadcast/Multicast Services (MBMS) over a Single Frequency Network (MBSFN) service and idle mode unicast service for a mobile entity from a source base station to a target base station may be managed by a base station or mobile entity of a cellular wireless communications system (WCS). Operations related to the transfer may include obtaining an MBMS status of the mobile entity, and/or obtaining MBMS support information for the base station. A network entity may facilitate MBMS discovery by a mobile entity, by transmitting a data element to the mobile entity including service identifiers mapped to corresponding cell identifiers to indicate respective MBMS services to be broadcast in an WCS area on adjacent cells identified by respective ones of the cell identifiers. The MBMS services may be broadcast within the WCS area using the adjacent cells previously indicated in the data element.
    Type: Application
    Filed: August 27, 2015
    Publication date: December 24, 2015
    Inventors: Xiaoxia Zhang, Jun Wang, Zhengwei Liu, Andrea Garavaglia, Kuo-Chun Lee, George Cherian
  • Publication number: 20150373533
    Abstract: Transfer of Multimedia Broadcast/Multicast Services (MBMS) over a Single Frequency Network (MBSFN) service and idle mode unicast service for a mobile entity from a source base station to a target base station may be managed by a base station or mobile entity of a cellular wireless communications system (WCS). Operations related to the transfer may include obtaining an MBMS status of the mobile entity, and/or obtaining MBMS support information for the base station. A network entity may facilitate MBMS discovery by a mobile entity, by transmitting a data element to the mobile entity including service identifiers mapped to corresponding cell identifiers to indicate respective MBMS services to be broadcast in an WCS area on adjacent cells identified by respective ones of the cell identifiers. The MBMS services may be broadcast within the WCS area using the adjacent cells previously indicated in the data element.
    Type: Application
    Filed: August 27, 2015
    Publication date: December 24, 2015
    Inventors: Xiaoxia Zhang, Jun Wang, Zhengwei Liu, Andrea Garavaglia, Kuo-Chun Lee, George Cherian
  • Patent number: 9173192
    Abstract: Transfer of Multimedia Broadcast/Multicast Services (MBMS) over a Single Frequency Network (MBSFN) service and idle mode unicast service for a mobile entity from a source base station to a target base station may be managed by a base station or mobile entity of a cellular wireless communications system (WCS). Operations related to the transfer may include obtaining an MBMS status of the mobile entity, and/or obtaining MBMS support information for the base station. A network entity may facilitate MBMS discovery by a mobile entity, by transmitting a data element to the mobile entity including service identifiers mapped to corresponding cell identifiers to indicate respective MBMS services to be broadcast in an WCS area on adjacent cells identified by respective ones of the cell identifiers. The MBMS services may be broadcast within the WCS area using the adjacent cells previously indicated in the data element.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: October 27, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaoxia Zhang, Jun Wang, Zhengwei Liu, Andrea Garavaglia, Kuo-Chun Lee, George Cherian
  • Publication number: 20150303603
    Abstract: An electrical connector has a carbon nanotube (CNT) conductor, a terminal terminated to the CNT conductor, and a conductive intermediary electrically coupled to the CNT conductor and the terminal to enhance an electrical connection between the CNT conductor and the terminal. Optionally, the terminal may have a crimp barrel that receives the CNT conductor. The electrical connector may include a second CNT conductor where the terminal splices the CNT conductor and the second CNT conductor together.
    Type: Application
    Filed: June 30, 2015
    Publication date: October 22, 2015
    Applicant: Tyco Electronics Corporation
    Inventors: Jessica Henderson Brown Hemond, Jerzy Gazda, Zhengwei Liu, Rodney Ivan Martens, Min Zheng, Forest I. Bohrer, Jeanine M.W. Olson
  • Patent number: 9130726
    Abstract: Methods and apparatuses are provided that include decoding multicast broadcast communications where scheduling information related to a multicast channel is not properly received over a control channel. Media access control (MAC) packets can be decoded to determine whether a MAC subheader indicates the packet relates to a logical channel by indicating an associated channel identifier. Where the channel identifier of the MAC packet matches that of a requested logical channel, data in the MAC packet can be provided to a communications layer. Subsequent packets can be processed and provided to the communications layer until a different channel identifier is encountered.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 8, 2015
    Assignee: QUALCOMM INCORPORATED
    Inventors: Zhengwei Liu, Arnaud Meylan, Jun Wang, Xiaoxia Zhang, Kuo-Chun Lee
  • Patent number: 9112002
    Abstract: A method of manufacturing an electrical conductor includes providing a substrate layer, depositing a surface layer on the substrate layer that has pores at least partially exposing the substrate layer, and forming graphene deposits in the pores. Optionally, the graphene deposits may be formed only in the pores. The graphene deposits may be formed along the exposed portions of the substrate layer. The graphene layers may be selectively deposited or may be deposited to cover an entire layer. Optionally, the forming of the graphene deposits may include processing the electrical conductor using a chemical vapor deposition process using an organic compound precursor and heat of sufficient temperature to facilitate graphene growth on the metal compound comprising the substrate layer.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: August 18, 2015
    Assignee: TYCO ELECTRONICS CORPORATION
    Inventors: Mary Elizabeth Sullivan-Malervy, Robert Daniel Hilty, Rodney I. Martens, Min Zheng, Jessica Henderson Brown Hemond, Zhengwei Liu
  • Patent number: 9107186
    Abstract: Carrier aggregation to enhance Evolved Multimedia Broadcast Multicast Service (eMBMS) includes transmitting unicast signaling for a unicast service on an anchor carrier to mobile entities, transmitting eMBMS signaling on a second carrier different from the anchor carrier to the mobile entities for use with the unicast signaling, and various techniques for practical application of carrier aggregation for eMBMS enhancement. In addition, allocating subframes used for MBMS on a Single Frequency Network (MBSFN) includes allocating at least a portion of one or more subframes otherwise reserved for unicast subframes on a mixed carrier to provide an increased allocation of subframes carrying MBSFN information, transmitting MBSFN signals on the increased allocation of subframes, and more detailed aspects.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: August 11, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaoxia Zhang, Yongbin Wei, Durga Prasad Malladi, Jun Wang, Zhengwei Liu, Gang Bao
  • Publication number: 20150223207
    Abstract: A method for mitigation of lost resource allocation synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a Hybrid Automatic Repeat Request (HARQ) transmission and/or retransmission process is described. The method includes determining whether resource allocation is out of synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a hybrid automatic repeat request (HARQ) transmission and/or retransmission process. The method further includes mitigating a loss of resource allocation synchronization between the UE and the eNodeB during the HARQ transmission and/or retransmission process.
    Type: Application
    Filed: April 16, 2015
    Publication date: August 6, 2015
    Inventors: Zhengwei LIU, Magnus D. KRETZ, Wanshi CHEN, Xiaoxia ZHANG, Hao XU
  • Patent number: 9070992
    Abstract: An electrical connector has a carbon nanotube (CNT) conductor, a terminal terminated to the CNT conductor, and a conductive intermediary electrically coupled to the CNT conductor and the terminal to enhance an electrical connection between the CNT conductor and the terminal. Optionally, the terminal may have a crimp barrel that receives the CNT conductor. The electrical connector may include a second CNT conductor where the terminal splices the CNT conductor and the second CNT conductor together.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: June 30, 2015
    Assignee: TYCO ELECTRONICS CORPORATION
    Inventors: Jessica Henderson Brown Hemond, Jerzy Gazda, Zhengwei Liu, Rodney Ivan Martens, Min Zheng
  • Patent number: 9048986
    Abstract: A method for mitigation of lost resource allocation synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a Hybrid Automatic Repeat Request (HARQ) transmission and/or retransmission process is described. The method includes determining whether resource allocation is out of synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a hybrid automatic repeat request (HARQ) transmission and/or retransmission process. The method further includes mitigating a loss of resource allocation synchronization between the UE and the eNodeB during the HARQ transmission and/or retransmission process.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: June 2, 2015
    Assignee: QUALCOMM INCORPORATED
    Inventors: Zhengwei Liu, Magnus D. Kretz, Wanshi Chen, Xiaoxia Zhang, Hao Xu