Yan J Li

US Patent:

6356986, Mar 12, 2002

Filed:

Apr 14, 1999

Appl. No.:

09/291187

Inventors:

Tony Solomon - Hillsboro OR
Yan Li - Hillsboro OR

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G06F 1200

US Classification:

711157, 711 5, 711118, 711127, 711154, 711172

Abstract:

A method and apparatus for analyzing the configuration of a computer main memory. A complex memory controller, which imposes restrictions on the memorys configuration, determines whether a user-selected configuration is consistent with those restrictions. The results of the determination are then reported to the user. The results may also be used to program the memory controller.

US Patent:

6956770, Oct 18, 2005

Filed:

Sep 17, 2003

Appl. No.:

10/667223

Inventors:

Shahzad Khalid - West Los Angeles CA, US
Yan Li - Milpitas CA, US
Mehrdad Mofidi - Fremont CA, US

Assignee:

SanDisk Corporation - Sunnyvale CA

International Classification:

G11C016/04

US Classification:

36518512, 36518517, 36518522

Abstract:

When programming a contiguous page of memory storage units, every time a memory storage unit has reached its targeted state and is program-inhibited or locked out from further programming, it creates a perturbation on an adjacent memory storage unit still under programming. The present invention provides as part of a programming circuit and method in which an offset to the perturbation is added to the adjacent memory storage unit still under programming. The offset is added as voltage offset to a bit line of a storage unit under programming. The voltage offset is a predetermined function of whether none or one or both of its neighbors are in a mode that creates perturbation, such as in a program inhibit mode. In this way, an error inherent in programming in parallel high-density memory storage units is eliminated or minimized.

US Patent:

7215574, May 8, 2007

Filed:

Oct 13, 2005

Appl. No.:

11/250357

Inventors:

Shahzad Khalid - West Los Angeles CA, US
Yan Li - Milpitas CA, US
Mehrdad Mofidi - Fremont CA, US

Assignee:

Sandisk Corporation - Milpitas CA

International Classification:

G11C 11/34
G11C 16/04

US Classification:

36518512, 36518517

Abstract:

When programming a contiguous page of memory storage units, every time a memory storage unit has reached its targeted state and is program-inhibited or locked out from further programming, it creates a perturbation on an adjacent memory storage unit still under programming. The present invention provides as part of a programming circuit and method in which an offset to the perturbation is added to the adjacent memory storage unit still under programming. The offset is added as voltage offset to a bit line of a storage unit under programming. The voltage offset is a predetermined function of whether none or one or both of its neighbors are in a mode that creates perturbation, such as in a program inhibit mode. In this way, an error inherent in programming in parallel high-density memory storage units is eliminated or minimized.

US Patent:

20070282313, Dec 6, 2007

Filed:

Jun 1, 2007

Appl. No.:

11/757195

Inventors:

David Huang - South Pasadena CA, US
Jonathan Song - South Pasadena CA, US
Yan Li - Pasadena CA, US
Maolong Tang - San Gabriel CA, US

Assignee:

University of Southern California - Los Angeles CA

International Classification:

A61B 18/18

US Classification:

606005000

Abstract:

Optical coherence tomography (OCT) is used to map the surface elevation and thickness of the cornea. The OCT maps are used to plan laser procedures for the treatment of an irregular, opacified or weakened cornea, and in the treatment of refractive errors. In the excimer laser phototherapeutic keratectomy (PTK) procedure, the OCT data is used to plan a map of ablation depth needed to restore a smooth optical surface. In the excimer laser photorefractive keratectomy procedure, OCT mapping of epithelial thickness is used to achieve clean laser epithelial removal. In femtosecond laser anterior keratoplasty procedure, OCT data is used to plan the depth of femtosecond laser dissection to remove an anterior layer of the cornea, leaving a smooth recipient bed of uniform thickness to receive a disk of donated corneal tissue. The linkage of an OCT system to a precise laser surgical system enables the performance of new procedures that are safer, less invasive and produce faster visual recovery than conventional surgical procedures.

US Patent:

20130128222, May 23, 2013

Filed:

Apr 6, 2012

Appl. No.:

13/441733

Inventors:

David HUANG - Portland OR, US
Yan LI - Portland OR, US
Ou TAN - Portland OR, US
Maolong TANG - Portland OR, US

Assignee:

UNIVERSITY OF SOUTHERN CALIFORNIA - Los Angeles CA

International Classification:

A61B 3/10

US Classification:

351206, 351246

Abstract:

This invention discloses methods and systems for measuring corneal epithelial thickness and power, stromal thickness, subepitheila corneal power and topography. The systems and methods disclosed herein are non-invasive, non-contact and automated imaging methods which preferably makes use of Fourier-domain optical tomography. Also disclosed herein are scanning patterns and image analysis methods for utilizing and analyzing Fourier-domain optical coherence tomography images to obtain information about conical epithelial and stromal properties as well as parameters useful for evaluating the properties. The methods and systems described herein are useful as eye disease diagnostic tools and eye surgery planning tools.

US Patent:

58357041, Nov 10, 1998

Filed:

Nov 6, 1996

Appl. No.:

8/744625

Inventors:

Yan Li - Hillsboro OR
Mahesh Natu - Beaverton OR

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G06F 1328

US Classification:

39518318

Abstract:

A method of testing at least a selected portion of system memory for a microprocessor system is disclosed, the microprocessor system having burst mode capability to transfer data values between the microprocessor and the system memory via a system bus. The method includes the steps of: writing at least a selected portion of system memory with a predetermined test pattern using the burst mode capability of the microprocessor system; reading back values from the at least a selected portion of system memory using the burst mode capability of the microprocessor system; and comparing the values read from the at least a selected portion of system memory with the predetermined test pattern written.

US Patent:

20200054208, Feb 20, 2020

Filed:

Aug 21, 2019

Appl. No.:

16/547110

Inventors:

- Portland OR, US
Yan Li - Portland OR, US
David Huang - Portland OR, US

Assignee:

Oregon Health & Science University - Portland OR

International Classification:

A61B 3/107
G06T 7/00
G06T 7/60
G06K 9/62
A61B 3/00
A61B 3/10
G06T 7/62

Abstract:

Disclosed are systems and methods for characterizing corneal shape abnormalities. These methods may be used to differentiate corneas having subclinical keratoconus from other conditions which cause distortion of corneal shape, including warpage of the cornea due to contact lens wear. Also disclosed is classification scheme to aid diagnosis of corneal conditions and thereby guide clinical decision making regarding patient treatment. This classification scheme is based on computed properties of corneal shape, is amenable to automation, and may be implemented in an integrated system or provided in the form of software encoded on a computer-readable medium.

US Patent:

20180317851, Nov 8, 2018

Filed:

Nov 7, 2017

Appl. No.:

15/805392

Inventors:

- Portland OR, US
David Huang - Portland OR, US
Yan Li - Portland OR, US
Acner Camino - Portland OR, US

International Classification:

A61B 5/00
A61B 5/026

Abstract:

Described herein is an algorithm to remove decorrelation noise due to bulk motion in optical coherence tomography angiography (OCTA). OCTA B-frames are divided into segments within which the bulk motion velocity could be assumed constant. This velocity is recovered using linear regression of decorrelation versus the logarithm of reflectance in axial lines (A-lines) identified as bulk tissue by percentile analysis. The fitting parameters are used to calculate a reflectance-adjusted threshold for bulk motion decorrelation. Below this threshold, voxels are identified as non-flow tissue, and their flow values are set to zeros. Above this threshold, the voxels are identified as flow voxels and bulk motion velocity is subtracted from each using a nonlinear decorrelation-velocity relationship. Compared to the median-subtraction method, the bulk motion subtraction algorithm described herein improves angiogram signal-to-noise ratio, contrast, vessel density repeatability, and bulk motion noise cleanup, while preserving the connectivity of the vascular networks in the angiogram.