Patents by Inventor Qun Guo

Qun Guo 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: 7238276
    Abstract: The present invention relates to a medium-pressure hydrocracking process which uses a fresh hydrogen resource and a hydrosaturation catalyst with reduced metals of group VIB and/or group VIII as the active ingredients to selectively and deeply hydrosaturate jet fuel and/or diesel cuts derived in the medium-pressure hydrocracking process.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: July 3, 2007
    Assignees: China Petroleum Corporation, Fushun Research Institute of Petroleum and Petrochemicals
    Inventors: Xiangchen Fang, Ling Lan, Xiaobing Song, Minghua Guan, Guang'an Jiang, Fenglai Wang, Zhengnan Yu, Qun Guo
  • Publication number: 20070143375
    Abstract: A well-known transactions feature in data replication that takes the “last seen” transaction watermark, stores the watermark for each source in a topology, and tags each transaction with information associated with its origin. The tagged data is called Originator Information, and contains, but is not limited to, information on the originating server, originating database, and the originating transaction. This technology provides users with a method to scale out (keep more than two nodes in synchronism with updates at all nodes), increase availability of data during limited network failures (multiple replication pathways), and improve recovery strategies (redeliver transactions upon restore).
    Type: Application
    Filed: October 12, 2006
    Publication date: June 21, 2007
    Applicant: MICROSOFT CORPORATION
    Inventors: Richard Tom, Kaushik Choudhury, Qun Guo
  • Patent number: 7143123
    Abstract: A well-known transactions feature in data replication that takes the “last seen” transaction watermark, stores the watermark for each source in a topology, and tags each transaction with information associated with its origin. The tagged data is called Originator Information, and contains, but is not limited to, information on the originating server, originating database, and the originating transaction. This technology provides users with a method to scale out (keep more than two nodes in synchronism with updates at all nodes), increase availability of data during limited network failures (multiple replication pathways), and improve recovery strategies (redeliver transactions upon restore).
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: November 28, 2006
    Assignee: Microsoft Corporation
    Inventors: Richard W. Tom, Kaushik Choudhury, Qun Guo
  • Publication number: 20050289186
    Abstract: Data declaration language (DDL) replication can be performed without stopping the system. In other words, DDL changes can be replicated seamlessly. Within a RDBMS (relational database management system), the execution of a DDL statement involves many internal steps which are not visible to an end user. These steps can be logically divided into three stages, “pre-stage” which refers to the steps before the server makes a physical change to the system catalog for the specific DDL, “middle-stage” which refers to the action of making a change to the system catalog, and “post-stage” which refers to the steps after changes to the system catalog were made. Schema changes are intercepted in both pre-stage and post-stage. Schema changes are intercepted in pre-stage so an old image of schema information can be saved. This helps to support schema versioning logic. Schema changes are intercepted in post-stage so sets of commands can be posted to propagate the schema change, as well as to refresh any dependencies.
    Type: Application
    Filed: June 29, 2004
    Publication date: December 29, 2005
    Applicant: Microsoft Corporation
    Inventors: Qun Guo, Vaqar Pirzada
  • Publication number: 20050286415
    Abstract: The present invention is directed to systems and methods for lightweight deadlock detection among a number of parallel transacted connections. Rather than employing an additional separate monitoring connection, the present invention enables a transacted connection to query the subscriber and determine a connection status for other connections within the same transaction. The transacted connection queries the subscriber when the transacted connection is idle, thereby minimizing overhead and yielding better throughput. The elimination of the separate monitoring connection conserves network bandwidth and system processing capability.
    Type: Application
    Filed: June 28, 2004
    Publication date: December 29, 2005
    Applicant: Microsoft Corporation
    Inventor: Qun Guo
  • Publication number: 20050165858
    Abstract: A well-known transactions feature in data replication that takes the “last seen” transaction watermark, stores the watermark for each source in a topology, and tags each transaction with information associated with its origin. The tagged data is called Originator Information, and contains, but is not limited to, information on the originating server, originating database, and the originating transaction. This technology provides users with a method to scale out (keep more than two nodes in synchronism with updates at all nodes), increase availability of data during limited network failures (multiple replication pathways), and improve recovery strategies (redeliver transactions upon restore).
    Type: Application
    Filed: January 9, 2004
    Publication date: July 28, 2005
    Inventors: Richard Tom, Kaushik Choudhury, Qun Guo
  • Publication number: 20040206668
    Abstract: The present invention relates to a medium-pressure hydrocracking process which uses a fresh hydrogen resource and a hydrosaturation catalyst with reduced metals of group VIB and/or group VIII as the active ingredients to selectively and deeply hydrosaturate jet fuel and/or diesel cuts derived in the medium-pressure hydrocracking process.
    Type: Application
    Filed: May 11, 2004
    Publication date: October 21, 2004
    Applicant: China Petroleum Corporation, Fushun Research Institute of Petroleum and Petroch
    Inventors: Xiangchen Fang, Ling Lan, Xiaobing Song, Minghua Guan, Guang'an Jiang, Fenglai Wang, Zhengnan Yu, Qun Guo
  • Publication number: 20040162859
    Abstract: A transactional replication system wherein each replicated command applies to a single row as identified by the primary key, replicated commands are dispatched among multiple connections by hashing of primary key from a single command queue to ensure that changes to the same data row are always dispatched to the same connection to maintain the order of commands as originally occurred on publisher. All connections commit their transactions at the same time in a coordinated fashion without a two phase commit. Retry logic based on a logical sequence number is used to reapply commands from any connection that fails to commit.
    Type: Application
    Filed: February 19, 2003
    Publication date: August 19, 2004
    Inventors: Qun Guo, Michael E. Habben
  • Publication number: 20020008050
    Abstract: The present invention discloses a medium-pressure hydrocracking process able to simultaneously produce products such as qualified gasoline, kerosene, diesel, etc.. Based on the prior medium-pressure hydrocracking process, the present invention uses a fresh hydrogen resource and a hydrosaturation catalyst with reduced metals of group VIB and/or group VIII as the active components to selectively and deeply hydrosaturate the jet fuel and/or diesel cuts derived in the medium-pressure hydrocracking, thereby allowing the quality of these cut fractions to meet the requirement of the specifications. In the present invention, a quite favorable reaction environment is created for the deep hydrosaturation of the jet fuel and/or diesel cuts with an extremely low investment by reasonable combination of the medium-pressure hydrocracking process flow, full reliance on the medium-pressure hydrocracking,, and addition of an ultra-low-pressure hydrosaturation reactor.
    Type: Application
    Filed: May 18, 2001
    Publication date: January 24, 2002
    Inventors: Xiangchen Fang, Ling Lan, Xiaobing Song, Minghua Guan, Guang?apos;an Jiang, Fenglai Wang, Zhengnan Yu, Qun Guo