Feng Ying Y Zhao, 61927 Belfair Rd, Bellevue, WA 98004

6374677, Apr 23, 2002

Feb 22, 2000

09/510367

Andrew A. Berlin - San Jose CA
Elmer S. Hung - Foster City CA
Feng Zhao - Campbell CA

Xerox Corporation - Stamford CT

G01M 700

73662

A micromechanical resonator including a motion arresting mechanism to rapidly damp the vibration of a resonator beginning at any given moment in time to remove vibration caused by previous events. An electrostatic clamp uses a bias voltage between an electrode and the resonator to damp the resonator and return it to its equilibrium position. A mechanical clamp includes an actuator that forces the mechanical clamp to contact the resonator. These micromechanical resonators facilitate condition based monitoring of complex electromechanical machines and components by allowing signature analysis in multiple temporal and frequency domains.

6412131, Jul 2, 2002

Feb 22, 2000

09/510366

Feng Zhao - Campbell CA
Andrew A. Berlin - San Jose CA
Elmer S. Hung - Foster City CA

Xerox Corporation - Stamford CT

G01H 1108

7659, 73660

A MEMS-based system that enables low cost, low power, single chip realization of real-time signal detection and fault diagnosis. The system is suitable for analyzing the time-varying properties of a signal that are important for condition-based monitoring of electro-mechanical machines or structures. The system includes mechanical sensors that sense input signals such as vibration, signal templates of fault conditions, logic units that detect, store, and compare signal features to provide a diagnostic state, and an output readout mechanism to couple the diagnostic state to readout device that provides an external signal.

6539343, Mar 25, 2003

Feb 3, 2000

09/497113

Feng Zhao - Campbell CA

Xerox Corporation - Stamford CT

G06F 1900

702190, 708400

The present invention discloses methods for condition-based monitoring of a system and its components using joint time-frequency analysis and signal demodulation. A first method allows construction of models of non-stationary signals having multiple time and frequency scales of interest. In particular, the method uses wavelet analysis to encode essential information in time-frequency transformations and provides a signal model for an operating fault or normal operation of a system of interest. A second method uses the signal models for condition-based monitoring to detect a change in a signal. In this method, the signal models are correlated with sensor signals to determine the operating condition of a system or system component. A third method for condition-based monitoring uses signal demodulation. In this method, a nominal response of a system component is subtracted from a detected signal to more reliably detect subtle changes in the signal due to component degradation.

6633821, Oct 14, 2003

Jan 8, 2001

09/756455

Warren B. Jackson - San Francisco CA
Sudhendu Rai - Fairport NY
Feng Zhao - Campbell CA

Xerox Corporation - Stamford CT

G06F 1900

702 56, 702183

A method and apparatus for collecting and using data is disclosed. There is at least one sensor that placed within a workspace for sensing vibrations associated with at least one machine operating in the workspace. In addition, there is at least one tag associated with a particular job. The tag indicates the contemporaneous status of tasks relating to the job. At least one processor is in communication with each of the at least one acoustic sensors and at least one tag. This processor receives data relating to acoustic and task status from the at least one acoustic sensor and at least one tag. The acoustic sensor senses vibration and/or sound. Workflow analysis and fault diagnosis and prediction are then based on data collected.

6687653, Feb 3, 2004

Aug 13, 2002

10/217026

James A. Kurien - Cupertino CA
Xenofon Koutsoukos - Sunnyvale CA
Feng Zhao - Campbell CA

Xerox Corporation - Stamford CT

G21C 1700

702183, 714 25

A system for the distributed diagnosis of a physical system includes serveral local diagnostic subsystems that generate local diagnoses based on observations of a component of the physical system. An interface is defined by which the local diagnostic subsystems communicate. Further, an algorithm for assembling a global diagnosis from the local diagnoses is fined.

6985089, Jan 10, 2006

Oct 24, 2003

10/693511

Jie Liu - Mountain View CA, US
Xue Yang - Urbana IL, US
Feng Zhao - Campbell CA, US

Palo Alto Reserach Center Inc. - Palo Alto CA

B60Q 1/00

340903, 340436

A method is provided for vehicle to vehicle communication among vehicles having wireless communication links. Upon receiving notification of a sudden change in vehicle behavior, a vehicle broadcasts a priority message to surrounding vehicles within a transmission range. If an emergency event has occurred, a repeat cycle is defined for re-broadcasting the message, and a maximum number of initial repetitions for the message is specified. The message is transmitted repeatedly by a leader vehicle, with a pause between each transmission, until the maximum number of repetitions has been reached.

7194463, Mar 20, 2007

May 28, 2003

10/446115

Feng Zhao - Campbell CA, US
Horst W. Haussecker - Palo Alto CA, US

Xerox Corporation - Stamford CT

G06F 17/30
G06F 11/00

707 5, 707 3, 370238

This invention describes methods and systems for tasking nodes in a distributed ad hoc network. A node is selected to participate in a data gathering or a routing task based on its potential contribution to information gain and the cost associated with performing the task such as communication bandwidth usage. This invention describes methods and systems for implementing various selection strategies at each node, using local knowledge about the network. For resource-limited sensor networks, the information-driven data gathering and routing strategies significantly improve the scalability and quality of sensing systems, while minimizing resource cost.

7292956, Nov 6, 2007

Nov 20, 2006

11/561855

Shai Guday - Redmond WA, US
Ruston John David Panabaker - Bellevue WA, US
Eric Horvitz - Kirkland WA, US
Michael Sinclair - Kirkland WA, US
William Jefferson Westerinen - Issaquah WA, US
Feng Zhao - Issaquah WA, US

Microsoft Corporation - Redmond WA

G06F 3/01

702118, 702120, 702122, 702126

A method and system is provided for management of medical data from a network of devices. The network of devices may include federated sensors that collect and forward medical data pertaining to an individual or biological specimen. The federated sensors or a central or remote device may further process the medical data and assign a priority value to the medical data. Processing can also include the analysis of the data for sensor error, local fusion of multiple sensors into higher-level interpretations, and the summarization or abstraction of the data into information that people are more comfortable with sharing than they might be with transmittal of the base data. The medical data may be transported to a healthcare provider or other endpoints based on the priority value and the authorization of recipient.