Yan Liu

US Patent:

7004624, Feb 28, 2006

Filed:

Nov 14, 2003

Appl. No.:

10/713491

Inventors:

Yan Liu - Monterey Park CA, US

International Classification:

G01K 11/00
G01J 5/00

US Classification:

374162, 374130, 374121

Abstract:

A method and apparatuses for measuring the temperature of a radiating body utilizing the alexandrite effect. The method includes the steps of generating a mathematical relationship between a hue value and temperature for an alexandrite effect filter, receiving radiation from the radiating body, measuring a spectral power distribution of the radiation, calculating the hue value based on the spectral power distribution, and determining the temperature using the mathematical relationship. To implement the method, the apparatuses include an optical probe, a spectral or calorimetric measurement device, and a computer. The apparatuses can measure the temperature of any radiating body with or without spectral lines in the spectral power distribution, and are particularly advantageous to measure high to ultrahigh temperature for radiating bodies with spectral lines, such as plasma, electric arc, and high temperature flames.

US Patent:

7052177, May 30, 2006

Filed:

Apr 22, 2005

Appl. No.:

11/112054

Inventors:

Yan Liu - Monterey Park CA, US

International Classification:

G01K 11/00
G01J 5/00

US Classification:

374162, 374130, 374121

Abstract:

A method and apparatuses for measuring the temperature of a radiating body utilizing the alexandrite effect. The method includes the steps of generating a mathematical relationship between a hue value and temperature for an alexandrite effect filter, receiving radiation from the radiating body, measuring a spectral power distribution of the radiation, calculating the hue value based on the spectral power distribution, and determining the temperature using the mathematical relationship. To implement the method, the apparatuses include an optical probe, a spectral or calorimetric measurement device, and a computer. The apparatuses can measure the temperature of any radiating body with or without spectral lines in the spectral power distribution, and are particularly advantageous to measure high to ultrahigh temperature for radiating bodies with spectral lines, such as plasma, electric arc, and high temperature flames.

US Patent:

7277574, Oct 2, 2007

Filed:

Jun 27, 2005

Appl. No.:

11/169107

Inventors:

Yan Liu - New York NY, US
John Kender - Leonia NJ, US

Assignee:

The Trustees of Columbia University in the City of New York - New York NY

International Classification:

G06K 9/62

US Classification:

382159, 707 7, 712300

Abstract:

Methods and systems for feature selection are described. In particular, methods and systems for feature selection for data classification, retrieval, and segmentation are described. Certain embodiments of the invention are directed to methods and systems for complement sort-merge tree (CSMT), fast-converging sort-merge tree (FSMT), and multi-level (ML) feature selection. Accurate and fast results may be obtained by the feature selection methods and systems described herein.

US Patent:

7378784, May 27, 2008

Filed:

May 13, 2005

Appl. No.:

11/129703

Inventors:

Yan Liu - Monterey Park CA, US

International Classification:

H01J 5/16

US Classification:

313110, 313112

Abstract:

An optical filter used for modifying the spectral power distribution of high color temperature lamp to simulate CIE standard daylight illuminant. The optical filter comprising a heat-absorbing glass plate, a heat insulation washer, a longpass glass plate, and one or more spectral modification glass plate in series. The longpass glass plate and the heat absorbing glass plate determine the wavelength range, and the spectral modification glass plate(s) modify the spectral power distribution of the high color temperature halogen lamp. The CIE daylight simulators with the optical filter have very high colorimetric indexes.

US Patent:

7388656, Jun 17, 2008

Filed:

Dec 30, 2005

Appl. No.:

11/322431

Inventors:

Yan Liu - Monterey Park CA, US

International Classification:

G01N 21/87

US Classification:

356 30

Abstract:

A method and system, including a computer program product, implementing a color terminology for accurate color grading of gemstones are provided. The method includes generating a reference color to match that of a graded gemstone under the standard viewing environment, processing color data in different color spaces, assigning a color grade to specify the color of the gemstone graded. The reference color can be continuously changed by adjusting the hue, lightness and saturation values. The color grade comprises a color name and one or more corresponding color coordinates and/or one or more corresponding color notations, in the form of Color Name (Color Coordinates). The color name is used for verbal description of the color, and the color coordinate or color notation is for accurate color communication in the jewelry industry.

US Patent:

7652755, Jan 26, 2010

Filed:

Feb 23, 2007

Appl. No.:

11/678564

Inventors:

Yan Liu - Monterey Park CA, US

International Classification:

G01N 21/00
G01J 1/04

US Classification:

356 30, 356236, 250228

Abstract:

The present invention discloses an apparatus that comprises a spectrometer, and computer and a dual integrating sphere measurement arrangement comprising a measurement integrating sphere, a sample integrating sphere, a sample platform, a filter, a lens system, a baffle and a light source. The sample integrating sphere encloses a sample to provide a constant environment for simulating the visual color grading environment. The computer controls the spectrometer and provides measurement parameters calculated from physical parameters of the measured sample, including, but not limited to, shape, dimensions, refractive index, intensity of fluorescence and cut grade. The computer then calculates spectral reflectance and colorimetric data, and determines an average color grade by checking a look-up-table that represents the relationship between the CIELAB coordinate and the average color grade. The computer also determines a true color grade based upon the average color grade and the physical parameters, using mathematical analytic algorithms.

US Patent:

7790155, Sep 7, 2010

Filed:

Jul 8, 2005

Appl. No.:

11/177790

Inventors:

Sylvia Christakos - Mendham NJ, US
Yan Liu - Bloomfield NJ, US
Teresita Bellido - Little Rock AR, US

Assignee:

University of Medicine and Dentistry of New Jersey - New Brunswick NJ

International Classification:

A61K 48/00
C12N 15/867
C12N 15/861
C12N 15/86

US Classification:

424 932, 435456, 514 44

Abstract:

The present invention provides novel compositions containing a calbindin-Dtherapeutic element, which is involved in the regulation of apoptosis, and may be administered for the prevention of an abnormal apoptosis response in cells. In particular the compositions and methods of the present invention may be used for the prevention or induction of apoptosis in such cells types as osteoblasts and osteocytes. Specifically, the compositions and methods of the present invention are useful for the prevention of diseases associated with glucocorticoid induced cell death. Specifically, the compositions and methods of the present invention may be useful in the prevention of glucocorticoid induced cell death in osteoblasts and the treatment of such conditions as glucocorticoid induced osteoporosis.

US Patent:

20100141929, Jun 10, 2010

Filed:

Jun 2, 2009

Appl. No.:

12/477091

Inventors:

YAN Liu - Monterey Park CA, US

International Classification:

G01N 21/55

US Classification:

356 30

Abstract:

The present invention discloses method for color measurement and color grading of faceted gemstones, diamonds and the like. A novel three-step calibration insures an accurate spectral measurement of the sample inside the measurement integrating sphere. Using the method of the present invention, a computer provides measurement parameters calculated from the physical parameters of the measured sample, including, but not limited to, shape, dimensions, refractive index, intensity of fluorescence and cut grade. By means of the present invention, a computer then calculates the spectral reflectance and colorimetric data, and determines an average color grade by checking a look-up-table that represents the relationship between the CIELAB coordinate and the average color grade, and it also determines a true color grade based upon the average color grade and the physical parameters, using mathematical analyses and algorithms.