Yong Liu

US Patent:

6356815, Mar 12, 2002

Filed:

Aug 25, 2000

Appl. No.:

09/648501

Inventors:

Rongsheng Li - Hacienda Heights CA
Yong Liu - San Marino CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

G01C 2102

US Classification:

701 13, 701222, 701226, 244164, 244171

Abstract:

Stellar attitude-control systems and methods are provided with enhanced accuracy because they recognize that important star tracker errors exhibit a boresight symmetry and that these errors can be accurately defined by weighting a measurement-noise covariance matrix R(t ) with variances that are functions of off-boresight angles of detected stars. A method of the invention derives off-boresight angles from star-tracker signals of detected stars. These off-boresight angles are combined with variance coefficients to generate off-boresight variances r (t ) that are functions of the off-boresight angles and, in particular, correspond to star tracker color shift errors. A gain matrix K(t ) is then calculated with a weighted measurement-noise covariance matrix R(t ) that includes the off-boresight variances r (t ). This gain matrix is used to generate an attitude estimate matrix X*(t ) for use in spacecraft attitude control. The variance coefficients are preferably modified to include star tracker focal length shift errors which are also a function of off-boresight angles.

US Patent:

6630664, Oct 7, 2003

Filed:

Jun 14, 2000

Appl. No.:

09/596307

Inventors:

Jack A. Syage - Huntington Beach CA
Karl A. Hanold - Irvine CA
Matthew D. Evans - Irvine CA
Yong Liu - Fountain Valley CA

Assignee:

Syagen Technology - Tustin CA

International Classification:

H01J 4910

US Classification:

250288, 250423 P, 250382

Abstract:

A monitor that can detect a trace molecule that is ionized at approximately one atmosphere. The molecule is ionized with a photoionizer and detected by a detector. The monitor may include a number of techniques to introduce a sample into the photoionizer at approximately one atmosphere. One technique includes creating an electrically charged spray that is directed into the ionizer. The photoionizer may include a plurality of light sources that each ionize the sample with a different radiation energy.

US Patent:

20120060837, Mar 15, 2012

Filed:

Sep 10, 2010

Appl. No.:

12/880022

Inventors:

Yong LIU - Yorba Linda CA, US

International Classification:

A61M 16/00

US Classification:

12820421

Abstract:

A ventilator including an inspiration flow control unit and an expiration flow control unit coupled to the inspiration flow control unit. The ventilator also includes a nasal intermittent mandatory ventilation (NIMV) control system coupled to the inspiration flow control unit and the expiration flow control unit. The NIMV control system is configured to automatically and simultaneously adjust an inspiration flow and an expiration flow. A pressure of the inspiration flow is increased from a baseline pressure to a control pressure. A pressure of the expiration flow is returned to the baseline pressure.

US Patent:

20130042868, Feb 21, 2013

Filed:

Aug 17, 2011

Appl. No.:

13/212157

Inventors:

Yong Liu - Yorba Linda CA, US

International Classification:

A61M 16/00

US Classification:

12820421

Abstract:

A high frequency oscillation ventilator including an oscillating piston control system and a mean airway pressure control system. The oscillating piston control system and the mean airway pressure control system are closed-loop control systems. The oscillating piston control system is independent of the mean airway pressure control system.

US Patent:

20200379871, Dec 3, 2020

Filed:

May 31, 2019

Appl. No.:

16/428928

Inventors:

- Redmond WA, US
Arihant NAHATA - Bellevue WA, US
Diego VILLASENOR - Woodinville WA, US
Siddharth Deepak MEHTA - Kirkland WA, US
Pritesh KANANI - Redmond WA, US
William Edward MIAO - Bellevue WA, US
Rajasekaran SUBRAMANIAN - Redmond WA, US
Sivakumar Gobichettypalayam ANANTHAKRISHNAN - Redmond WA, US
Yong LIU - Sammamish WA, US

International Classification:

G06F 11/34
G06F 17/27
G06F 11/36
G06F 11/07

Abstract:

Technologies for assigning a user-generated issue report to an appropriate team for investigation are disclosed. A log file associated with an issue report is parsed to create an object model. The object model is a hierarchy of objects containing data emitted over time by a computer application associated with the issue report. Rules analyze the content of the object model, and when a rule is satisfied, the issue report is assigned to a team associated with the rule for investigation. Rules may access objects in the object model on a per-component level, thereby allowing issues to be assigned to teams at the level of individual components. Rules may also perform a root cause analysis of the issue based on the object model.

US Patent:

20160271359, Sep 22, 2016

Filed:

May 26, 2016

Appl. No.:

15/166211

Inventors:

- San Diego CA, US
Yong LIU - Yorba Linda CA, US

International Classification:

A61M 16/20
A61M 16/06

Abstract:

A ventilator including an inspiration flow control unit and an expiration flow control unit coupled to the inspiration flow control unit. The ventilator also includes a nasal intermittent mandatory ventilation (NIMV) control system coupled to the inspiration flow control unit and the expiration flow control unit. The NIMV control system is configured to automatically and simultaneously adjust an inspiration flow and an expiration flow. A pressure of the inspiration flow is increased from a baseline pressure to a control pressure. A pressure of the expiration flow is returned to the baseline pressure.