Gang G Liu

US Patent:

6762997, Jul 13, 2004

Filed:

Mar 29, 2000

Appl. No.:

09/537791

Inventors:

Gang Liu - North Plainfield NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 1256

US Classification:

370238, 370400

Abstract:

A method is disclosed for determining the shortest paths between a source node and a destination node in a network wherein the paths satisfy imposed system constraints. In accordance with the method of the invention, candidate paths are evaluated by accumulating system parameter information from a source node and projecting the system parameter information ahead to the destination node. When the accumulated and projected system parameter information for the candidate path satisfies the imposed system constraints, the candidate path is saved for further evaluation. The candidate paths are sorted in the order such that those paths most-likely to have the shortest lengths and satisfy the imposed system constraint are evaluated first. In one embodiment of the invention, candidate paths that fail to satisfy the imposed system constraints are removed from further processing. Thus, only candidate paths that have at least one complete path that satisfies the imposed system constraints are evaluated further.

US Patent:

6782198, Aug 24, 2004

Filed:

Nov 10, 2000

Appl. No.:

09/710269

Inventors:

Gang Liu - North Plainfield NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 1008

US Classification:

398 3, 398 4, 398 5

Abstract:

Recovery from link failure in a WDM ring network is implemented by forming an active ring and a protection ring through the same nodes. Failure in any wavelength channel of a link causes a node adjacent to the link to reroute any subsequent incoming signal from the source node and on the active ring to the protection ring and in an opposite direction. The oppositely directed signal is rerouted again at the other adjacent node back to the active ring to arrive at the destination node. The physical ring serving as the active ring to odd wavelength channels serves as the protection ring to even wavelength channels, and vice versa.

US Patent:

7058296, Jun 6, 2006

Filed:

Mar 12, 2001

Appl. No.:

09/805021

Inventors:

Iraj Saniee - New Providence NJ, US
Eric Bouillet - Eatontown NJ, US
Gang Liu - Denver CO, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04J 14/00

US Classification:

398 3

Abstract:

A procedure for designing WDM optical networks provides both working circuits and protection circuits for carrying traffic demands between node pairs. The protection circuits are activated for the purpose of network recovery in case of a fault on a working circuit. Each protection circuit is link-disjoint, and preferably node-disjoint, from its corresponding working circuit. The network is subdivided into logically defined rings, such that each working and protection circuit lies on one or more of the rings. In particular embodiments of the invention, the joint routing of circuits is carried out so as to minimize the total length of the working and protection circuits according to a length that includes a weight for each link. The weight is selected to promote the efficient packing of optical fibers with wavelength channels.

US Patent:

7171036, Jan 30, 2007

Filed:

Mar 14, 2003

Appl. No.:

10/389475

Inventors:

Gang Liu - Framingham MA, US
Aaron Wallack - Natick MA, US
David Michael - Wayland MA, US

Assignee:

Cognex Technology and Investment Corporation - Mt. View CA

International Classification:

G06K 9/00

US Classification:

382145, 382151, 382168

Abstract:

An image of a semiconductor interconnection pad is analyzed to determine a geometric description of the zone regions of a multiple zone semiconductor interconnection pad. Edge detection machine vision tools are used to extract features in the image. The extracted features are analyzed to derive geometric descriptions of the zone regions of the pad, that are applied in semiconductor device inspection, fabrication, and assembly operations.

US Patent:

7466913, Dec 16, 2008

Filed:

Oct 7, 2005

Appl. No.:

11/245597

Inventors:

Iraj Saniee - New Providence NJ, US
Eric Bouillet - Eatontown NJ, US
Gang Liu - Denver CO, US

Assignee:

Alcatel-Lucent USA Inc. - Murray Hill NJ

International Classification:

H04J 14/00

US Classification:

398 3

Abstract:

A procedure for designing WDM optical networks provides both working circuits and protection circuits for carrying traffic demands between node pairs. The protection circuits are activated for the purpose of network recovery in case of a fault on a working circuit. Each protection circuit is link-disjoint, and preferably node-disjoint, from its corresponding working circuit. The network is subdivided into logically defined rings, such that each working and protection circuit lies on one or more of the rings. In particular embodiments of the invention, the joint routing of circuits is carried out so as to minimize the total length of the working and protection circuits according to a length that includes a weight for each link. The weight is selected to promote the efficient packing of optical fibers with wavelength channels.

US Patent:

7943652, May 17, 2011

Filed:

Mar 26, 2009

Appl. No.:

12/411715

Inventors:

Michael D. Shultz - Stow MA, US
Christine Hiu-Tung Chen - Waltham MA, US
Young Shin Cho - Cambridge MA, US
Lei Jiang - Waltham MA, US
Jianmei Fan - Newton MA, US
Gang Liu - Waltham MA, US
Dyuti Majumdar - Cambridge MA, US
Jianke Li - Cambridge MA, US

Assignee:

Novartis AG - Basel

International Classification:

A61K 31/4162
A61K 31/4155
C07D 487/04
C07D 231/10

US Classification:

514403, 514406, 5483601, 5483641

Abstract:

The present teachings relate to compounds of Formula I:The present teachings also provide methods of preparing compounds of Formula I and methods of using compounds of Formula I in treating, inhibiting, or preventing pathologic conditions or disorders mediated wholly or in part by deacetylases.

US Patent:

8139231, Mar 20, 2012

Filed:

May 1, 2008

Appl. No.:

12/113492

Inventors:

John W. Schwab - Framingham MA, US
Gang Liu - Natick MA, US
David J. Michael - Wayland MA, US

Assignee:

Cognex Corporation - Natick MA

International Classification:

G01B 11/14

US Classification:

356614

Abstract:

A vision system is provided to determine a positional relationship between a photovoltaic device wafer on a platen and a printing element, such as a printing screen, on a remote side of the photovoltaic device wafer from the platen. A source emits ultraviolet light along a path that is transverse to a longitudinal axis of an aperture through the platen, and a diffuser panel is located along that path. A reflector directs the light from the diffuser panel toward the aperture. A video camera is located along the longitudinal axis of the aperture and produces an image using light received from the platen aperture, wherein some of that received light was reflected by the wafer. A band-pass filter is placed in front of the camera to block ambient light. The use of diffused ultraviolet light enhances contrast in the image between the wafer and the printing element.

US Patent:

8162584, Apr 24, 2012

Filed:

Aug 23, 2006

Appl. No.:

11/508551

Inventors:

David J. Michael - Wayland MA, US
James Clark - La Honda CA, US
Gang Liu - Natick MA, US

Assignee:

Cognex Corporation - Natick MA

International Classification:

G06K 9/00
H01L 21/677

US Classification:

414217

Abstract:

The invention provides, in some aspects, a wafer alignment system comprising an image acquisition device, an illumination source, a rotatable wafer platform, and an image processor that includes functionality for mapping coordinates in an image of an article (such as a wafer) on the platform to a “world” frame of reference at each of a plurality of angles of rotation of the platform.