Jun Xu

US Patent:

6862889, Mar 8, 2005

Filed:

Dec 3, 2002

Appl. No.:

10/308502

Inventors:

Timothy James Held - Blanchester OH, US
Mark Anthony Mueller - West Chester OH, US
Jun Xu - Mason OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23R003/14

US Classification:

60747, 60748, 431354

Abstract:

A method for operating a gas turbine engine facilitates reducing an amount of emissions from a combustor. The combustor includes a mixer assembly including a pilot mixer, a main mixer, and an annular centerbody extending therebetween. The method comprises injecting at least one of fuel and airflow into the combustor through at least one swirler positioned within the pilot mixer, and injecting fuel into the combustor through at least one swirler positioned within the main mixer, such that the fuel is directed into a combustion chamber downstream from the main mixer.

US Patent:

7007479, Mar 7, 2006

Filed:

Aug 30, 2004

Appl. No.:

10/929909

Inventors:

Timothy James Held - Blanchester OH, US
Mark Anthony Mueller - West Chester OH, US
Jun Xu - Mason OH, US

Assignee:

General Electric Company - Schenecady NY

International Classification:

F23R 3/14

US Classification:

60747, 60748

Abstract:

A method for operating a gas turbine engine facilitates reducing an amount of emissions from a combustor. The combustor includes a mixer assembly including a pilot mixer, a main mixer, and an annular centerbody extending therebetween. The method comprises injecting at least one of fuel and airflow into the combustor through at least one swirler positioned within the pilot mixer, and injecting fuel into the combustor through at least one swirler positioned within the main mixer, such that the fuel is directed into a combustion chamber downstream from the main mixer.

US Patent:

7059135, Jun 13, 2006

Filed:

Dec 20, 2005

Appl. No.:

11/312273

Inventors:

Timothy James Held - Blanchester OH, US
Mark Anthony Mueller - West Chester OH, US
Jun Xu - Mason OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F23R 3/14

US Classification:

60776, 60748

Abstract:

A method for operating a gas turbine engine facilitates reducing an amount of emissions from a combustor. The combustor includes a mixer assembly including a pilot mixer, a main mixer, and an annular centerbody extending therebetween. The method comprises injecting at least one of fuel and airflow into the combustor through at least one swirler positioned within the pilot mixer, and injecting fuel into the combustor through at least one swirler positioned within the main mixer, such that the fuel is directed into a combustion chamber downstream from the main mixer.

US Patent:

7293142, Nov 6, 2007

Filed:

Apr 19, 2004

Appl. No.:

10/827048

Inventors:

Jun Xu - Cupertino CA, US
Xiangrong Wang - Milpitas CA, US
Christopher H. Pham - Milpitas CA, US
Srinivas Goli - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 12/00

US Classification:

711124, 717124, 707206

Abstract:

Systems, methods, apparatus and software can be implemented to detect memory leaks with relatively high confidence. By analyzing memory blocks stored in a memory, implicit and/or explicit contingency chains can be obtained. Analysis of these contingency chains identifies potential memory leaks, and subsequent verification confirms whether the potential memory leaks are memory leaks.

US Patent:

7340900, Mar 11, 2008

Filed:

Dec 15, 2004

Appl. No.:

11/012638

Inventors:

Jun Xu - Mason OH, US
Timothy James Held - Blanchester OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F02C 1/00
F02G 3/00

US Classification:

60737, 60748

Abstract:

A method for decreasing combustor acoustics in gas turbine engines is provided. The method includes fabricating a plurality of premixers, chamfering a trailing edge of a main swirler shroud of each premixer, coupling a respective one of the chamfered premixers to each of a plurality of combustor domes, and coupling the plurality of combustor domes to an inlet of a combustor in a circumferential arrangement such that, during operation, the chamfered edge facilitates reducing combustor acoustics.

US Patent:

7444582, Oct 28, 2008

Filed:

Aug 1, 2005

Appl. No.:

11/195087

Inventors:

Siu-Hung Fred Au - Fremont CA, US
Gregory Burd - San Jose CA, US
Zining Wu - Los Altos CA, US
Jun Xu - Sunnyvale CA, US
Ichiro Kikuchi - Yokohama, JP
Tony Yoon - San Jose CA, US

Assignee:

Marvell International Ltd. - Hamilton

International Classification:

H03M 13/00

US Classification:

714784, 714780

Abstract:

Systems and methods are provided for implementing various aspects of a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. If the decision-codeword corresponds to an inner code and an RS code is the outer code, a soft-information map can process the soft-information for the decision-codeword to produce soft-information for a RS decision-codeword. A RS decoder can employ the Berlekamp-Massey algorithm (BMA), list decoding, and a Chien search, and can include a pipelined architecture. A threshold-based control circuit can be used to predict whether list decoding will be needed and can suspend the list decoding operation if it predicts that list decoding is not needed.

US Patent:

7454690, Nov 18, 2008

Filed:

Aug 1, 2005

Appl. No.:

11/195183

Inventors:

Siu-Hung Fred Au - Fremont CA, US
Gregory Burd - San Jose CA, US
Zining Wu - Los Altos CA, US
Jun Xu - Sunnyvale CA, US
Ichiro Kikuchi - Yokohama, JP
Tony Yoon - San Jose CA, US

Assignee:

Marvell International Ltd. - Hamilton

International Classification:

H03M 13/00

US Classification:

714780, 714784, 714759

Abstract:

Systems and methods are provided for implementing list decoding in a Reed-Solomon (RS) error-correction system. A detector can provide a decision-codeword from a channel and can also provide soft-information for the decision-codeword. The soft-information can be organized into an order of combinations of error events for list decoding. An RS decoder can employ a list decoder that uses a pipelined list decoder architecture. The list decoder can include one or more syndrome modification circuits that can compute syndromes in parallel. A long division circuit can include multiple units that operate to compute multiple quotient polynomial coefficients in parallel. The list decoder can employ iterative decoding and a validity test to generate error indicators. The iterative decoding and validity test can use the lower syndromes.

US Patent:

7487321, Feb 3, 2009

Filed:

Feb 15, 2005

Appl. No.:

11/058585

Inventors:

Manikam Muthiah - Dindigul, IN
Chandra Sekhar Putha - Thiruvanmiyur, IN
Jun Xu - Cupertino CA, US
Xiangrong Wang - Milpitas CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 12/00

US Classification:

711170, 707205, 707206, 717124, 717127, 718104, 711124

Abstract:

Systems, methods, apparatus and software can be implemented to detect memory leaks with relatively high confidence. By analyzing memory blocks stored in a memory, implicit and/or explicit contingency chains can be obtained. Analysis of these contingency chains identifies potential memory leaks, and subsequent successive verification confirms whether the potential memory leaks are memory leaks.