William W Chang

US Patent:

6577705, Jun 10, 2003

Filed:

Apr 2, 2001

Appl. No.:

09/824268

Inventors:

William Chang - Newark CA 94560
Xiao-Dong Xiang - Alameda CA 94502
Edward D. Franco - San Mateo CA 94402

International Classification:

G01N 23223

US Classification:

378 45, 378 71, 378 83

Abstract:

Method and system for analyzing local composition and structure of a compound having one or more non-zero gradients in concentration for one or more selected constituents in a selected direction. A beam of X rays having representative energy E is received by a mono-capillary or poly-capillary device and is directed at a selected small region of the compound. A portion of the X rays is diffracted at the selected region by one or more constituents of the compound, at each of two or more diffraction angles relative to a selected surface or lattice plane(s) of the compound; and the diffracted portion of X rays for each of these diffraction angles is received and analyzed at an X-ray detector. A portion of the X rays excites fluorescence radiation that is received by a fluorescence detector to estimate the relative concentrations in a compound having two or more constituents. Fluorescence X rays and diffraction X rays can be detected at each desired translational position and rotation for a target site. As a result, a concentration map for various constituents in the compound can be prepared, together with a phase map illustrating the structure of a combinatorial compound.

US Patent:

7917483, Mar 29, 2011

Filed:

Apr 26, 2004

Appl. No.:

10/832757

Inventors:

William I. Chang - Saratoga CA, US

Assignee:

Affini, Inc. - Saratoga CA

International Classification:

G06F 7/00

US Classification:

707705, 707709, 707E17107

Abstract:

A search engine and a method achieve timeliness of documents returned in a search result by a relevancy feedback mechanism driven by the frequency in which a URL is returned in recent searches. The relevancy feedback mechanism includes one or more random processes which determine whether or not a cached or indexed web page associated with a URL in the search result should be refreshed. In addition, the random processes also determine whether or not hyperlinks in the cached or indexed web page should be followed to access related web pages. Accesses of web pages resulting from the operations of the random processes are used to update any document index maintained by the search engine. Relevancy scoring functions implemented in look-up tables are also disclosed. A more accurate relevancy scoring function is achieved using a lexicon based on anchortexts of extracted hyperlinks of web documents.

US Patent:

8001469, Aug 16, 2011

Filed:

Nov 7, 2007

Appl. No.:

11/936644

Inventors:

Fuliang Weng - Mountain View CA, US
William Chang - Palo Alto CA, US
Baoshi Yan - Sunnyvale CA, US
Zhe Feng - Xian, CN

Assignee:

Robert Bosch GmbH - Stuttgart

International Classification:

G06F 3/00

US Classification:

715708

Abstract:

Systems and methods are described that automatically generate interactive systems configured for collecting dialog data of human-machine interactions in dialog systems. The systems and methods comprise receiving a task flow that describes operations of a dialog system. A formal description of the task flow is generated, and an interactive system comprising a graphical user interface (GUI) is automatically generated from the formal description. The GUI consists of templates for control of the dialog system and real-time collection and annotating of dialog data during a live dialog between only the dialog system and callers to the dialog system. The dialog data consists of data of the live dialog.

US Patent:

8606860, Dec 10, 2013

Filed:

Oct 20, 2005

Appl. No.:

11/256674

Inventors:

William I. Chang - Saratoga CA, US
Josiah Carlson - Irvine CA, US

Assignee:

Affini, Inc. - Saratoga CA

International Classification:

H04L 29/06

US Classification:

709206, 709207, 709217, 709219

Abstract:

A method for filtering email messages for a user, includes (a) obtaining from the user a first set of email addresses over which the user asserts authority and a second set of email addresses from which email messages are to be accepted; (b) obtaining from the email messages the sender and recipient email addresses; and (c) filtering the email messages directed to any one of the email addresses in the first set of email addresses according to the second set of email addresses. In one implementation, accepted email addresses are generalized from the second set of email addresses. Once a user's email address is accepted, email from email addresses owned by the same sender are automatically accepted.

US Patent:

8633823, Jan 21, 2014

Filed:

May 16, 2010

Appl. No.:

12/780910

Inventors:

William Chang - Newark CA, US
Edward D. Franco - San Mateo CA, US
Joseph Bendahan - San Jose CA, US
Jolyon A. Browne - San Jose CA, US

Assignee:

Rapiscan Systems, Inc. - Torrance CA

International Classification:

G08B 17/12
G01N 23/06
G01N 23/04
G21K 7/00

US Classification:

340600, 378 53, 378 57, 250308

Abstract:

The present invention is directed to an inspection system that has a radiation source, a detector array, an inspection region, and a processing unit, where the processing unit a) obtains a radiographic image, b) segments the radiographic image based on radiation attenuation or transmission, c) identifies at least one segmented area on the radiographic image, d) filters the at least one segmented area using at least one geometric filter, e) generates feature vectors using the filtered segmented area; and f) compares the feature vectors against predefined values to determine whether a high-atomic-number object is present.

US Patent:

8645345, Feb 4, 2014

Filed:

Mar 25, 2011

Appl. No.:

13/072455

Inventors:

William I. Chang - Saratoga CA, US

Assignee:

Affini, Inc. - Gardnerville NV

International Classification:

G06F 7/00

US Classification:

707705, 707709, 706 45

Abstract:

A search engine and a method achieve timeliness of documents returned in a search result by a relevancy feedback mechanism driven by the frequency in which a URL is returned in recent searches. The relevancy feedback mechanism includes one or more random processes which determine whether or not a cached or indexed web page associated with a URL in the search result should be refreshed. In addition, the random processes also determine whether or not hyperlinks in the cached or indexed web page should be followed to access related web pages. Accesses of web pages resulting from the operations of the random processes are used to update any document index maintained by the search engine. Relevancy scoring functions implemented in look-up tables are also disclosed. A more accurate relevancy scoring function is achieved using a lexicon based on anchortexts of extracted hyperlinks of web documents.

US Patent:

20040193612, Sep 30, 2004

Filed:

Mar 30, 2004

Appl. No.:

10/813940

Inventors:

William Chang - Saratoga CA, US

International Classification:

G06F017/30

US Classification:

707/010000

Abstract:

A distributed system of cooperative processes running on multiple processors of a computer network to accomplish a distributed transaction can be monitored and their execution traced by logging in a local resource of each processor records of execution data of the process on the processor. A search engine runs on each processor. The search engine retrieves corresponding records of execution data in response to a query. Such a query can be a distributed query issued to the processors simultaneously. The search engine may also index the records of execution data residing on the processor on which the search engine runs. By having a search engine run on each processor to manage local records of execution and retrieving the logged data using a distributed query, the present invention allows testing, monitoring and tracking of the distributed system during operation and subsequent to occurrence of a fault.

US Patent:

20040193691, Sep 30, 2004

Filed:

Mar 30, 2004

Appl. No.:

10/814010

Inventors:

William Chang - Saratoga CA, US

International Classification:

G06F015/16
G06F007/00
G06F017/30

US Classification:

709/206000, 709/245000, 707/003000

Abstract:

An eMail directory and forwarding service charge an eMail message sender a refundable sender's fee for each eMail message sent. The amount charged is specified by the recipient. The eMail directory allows an eMail message recipient to be located in a search by other users or commercial senders using biographical and affinity information voluntarily provided by the recipient in a profile database. Thus, based on his perception of the value of his time, the recipient may set his price for reading an eMail message. In turn, a sender (e.g., a commercial sender) can bid for the recipient's attention by paying the specified fee, or if the sender would like greater attention, a greater fee. A content search gateway collects information regarding a subscriber's search interests to include as affinity information in the profile database. Various information and email services are provided to foster an online community.