Yu Liu

US Patent:

6744727, Jun 1, 2004

Filed:

Aug 10, 2001

Appl. No.:

09/928287

Inventors:

Yu Liu - Raleigh NC
David TIpper - Pittsburgh PA

Assignee:

The University of Pittsburgh - Pittsburgh PA

International Classification:

H04L 1226

US Classification:

370228, 370217, 370218, 370221, 370225, 370226, 370227

Abstract:

A method is given for deriving a backup path routing spare capacity template that is feasible, scalable, adaptive, much faster, and near global optimal in redundancy reduction. The method includes determining working paths, aggregating the working paths into a first matrix, determining backup paths, aggregating the backup paths into a second matrix, and deriving the template from the first and second matrices. A method is also given for successively approximating the optimal spare capacity allocation needed for a network. The method includes, determining the link cost associated with a selected traffic flows backup path, determining an updated link cost that is less than the current link cost, determining a backup path with the updated link cost, and notifying the rest of the network of the backup path.

US Patent:

7639609, Dec 29, 2009

Filed:

Jul 15, 2007

Appl. No.:

11/778053

Inventors:

Gordon Bolt - Apex NC, US
Edward A. Sykes - Cary NC, US
Yu Liu - San Jose CA, US

Assignee:

OPNET Technologies, Inc. - Bethesda MD

International Classification:

H04L 12/26
G06F 15/177

US Classification:

370229, 370237, 370250, 370252, 709220, 709223

Abstract:

An existing network configuration is assessed, and potential changes to the existing configuration are identified that provide the greatest incremental improvements to the performance of the network. In a preferred embodiment, the user of the system identifies the maximum number (N) of changes that may be implemented in an existing network, and the system provides a set of possible reconfigurations, each requiring fewer than N changes. The user is presented a display of the potential improvement provided by each set as a function of the number of changes in the set, so that the relative incremental gain can be easily visualized. The objective function of the optimization may include conventional load-balancing objectives, or other objectives, such as a global minimization of path lengths.

US Patent:

7968701, Jun 28, 2011

Filed:

Aug 18, 2008

Appl. No.:

12/193600

Inventors:

Yu Liu - Brooklyn NY, US
Liang Ding - Ithaca NY, US
Ruojie Sha - Pomona NY, US
Nadrian Seeman - New York NY, US
James Canary - New York NY, US

Assignee:

New York University - New York NY

International Classification:

C07H 21/00

US Classification:

536 253, 536 221, 536 231

Abstract:

The present invention provides a polyribonucleoside ladder copolymer molecule of general formula (I).

US Patent:

20130089651, Apr 11, 2013

Filed:

Oct 6, 2012

Appl. No.:

13/646701

Inventors:

Diana Jaramillo - Edison NJ, US
Yu Liu - Yardley PA, US

Assignee:

INNOPHOS, INC. - Cranbury NJ

International Classification:

A21D 2/02

US Classification:

426563

Abstract:

The present invention relates to a chemical leavening composition for the production of bakery products with a carbon dioxide source and an acid component wherein the acid component comprises SAPP and a magnesium phosphate compound and mixtures thereof.