Xin L Zhou

7245369, Jul 17, 2007

Nov 12, 2004

10/985981

Sean Xiaolu Wang - Wilmington DE, US
Xin Jack Zhou - Hockessin DE, US

B & W Tek, Inc. - Newark DE

G01J 3/44

356301, 356317, 356318, 356417

An apparatus for measuring properties of physical matters by means of Raman spectroscopy including a laser element, a wavelength dispersion element, an array or single element detector, and a control and data processing unit. The laser element, which is used to excite Raman scattering, is spectrum narrowed and stabilized by attachment of a Bragg grating device. The grating can be either a volume Bragg grating (VBG) written inside a glass substrate or a fiber Bragg grating (FBG) written inside an optical fiber. A laser element can be provided with a wavelength modulation capability for fluorescence background suppression.

7420663, Sep 2, 2008

May 23, 2006

11/419823

Sean Xiaolu Wang - Wilmington DE, US
Xin Jack Zhou - Hockessin DE, US

BWT Property Inc. - Newark DE

G01J 3/28

356 72, 356326, 356328, 356419

This invention discloses a spectroscopic sensor that is integrated with a mobile communication device, such as a mobile phone. The spectroscopic sensor is capable of measuring the optical spectra of a physical object for purposes of detection, identification, authentication, and real time monitoring. Through the mobile communication device, the obtained spectral information can be transmitted, distributed, collected, and shared by utilizing all the functions of the known or existing wireless communication networks.

7829046, Nov 9, 2010

Aug 29, 2008

12/202098

Marc M. Baum - Arcadia CA, US
John Moss - Los Angeles CA, US
Xin Zhou - Rancho Cucamonga CA, US
Alex Kwan - Chino Hills CA, US
Alfred Feitisch - Los Gatos CA, US
Xiang Liu - Rancho Cucamonga CA, US

SpectraSensors, Inc. - Rancho Cucamonga CA

B01D 47/00
B01J 38/12

423210, 502 38

Scrubber media for reactive gases, that can include but are not necessarily limited to hydrogen chloride (HCl), hydrogen sulfide (HS), hydrogen fluoride (HF), and ammonia (NH), can include reactive particles, potentially as small as nano-scale, that can optionally be suspended on macro-scale carrier particles. Reactive gases can be converted to non-volatile compounds by being passed through a bed of such scrubber media. Such scrubber media can be used to remove reactive gases from gas mixtures. Potential applications include differential absorption spectroscopy, air pollutant emission controls, and the like. Methods of preparing scrubber media are also described.

8010554, Aug 30, 2011

Nov 8, 2007

11/983348

Xin Zhou - Los Angeles CA, US

Teradata US, Inc. - Dayton OH

G06F 17/20
G06F 15/16

707769, 709203

A query is received to perform a temporal aggregate on at least one attribute of a temporal table. In response to the query, value changes of the at least one attribute at timestamps are computed, and the value changes are aggregated to produce an aggregate value for the query.

8099409, Jan 17, 2012

Sep 3, 2008

12/203209

Xin Zhou - Monterey Park CA, US
Olli Pekka Kostamaa - Santa Monica CA, US

Teradata US, Inc. - Dayton OH

G06F 17/30

707714, 707770

A system, method, and computer-readable medium for optimizing join operations in a parallel processing system are provided. A respective set of rows of a first table and a second table involved in a join operation are distributed to each of a plurality of processing modules. The join operation comprises a join on a first column of the first table and a second column of the second table. Each of the plurality of processing modules redistributes at least a portion of the rows of the first table distributed thereto substantially equally among the other processing modules and duplicates at least a portion of the rows of the second table distributed thereto among the plurality of processing modules. The disclosed optimization mechanisms provide for reduced spool space requirements for execution of the parallel join operation.

8189975, May 29, 2012

Oct 5, 2009

12/573278

Ryan Edward Sullivan - Yardley PA, US
Qingxiong Li - Newark DE, US
Xin Jack Zhou - Hockessin DE, US
Sean Xiaolu Wang - Wilmington DE, US

BWT Property, Inc. - Newark DE

G02B 6/06

385116, 385 31, 385 33, 356301, 436 46, 436514, 250584

A fiber spectroscopic probe that can be mounted directly above the objective lens of a standard microscope to add a spectroscopic function to the microscope. The fiber spectroscopic probe only consists of a minimum number of optical components and is compact enough to induce minimum alteration to the optical path of the microscope.

8301652, Oct 30, 2012

Sep 3, 2008

12/203180

Xin Zhou - Monterey Park CA, US

Teradata US, Inc. - Dayton OH

G06F 17/30

707769

A method executed by a plurality of processors in a database system to implement temporal aggregate queries. The database system has a temporal table. A plurality of consecutive temporal partitions are defined and allocated to the respective processors. A query is received to aggregate at least one attribute of the temporal table. In response to the query, a plurality of timestamps are identified in the temporal table, the respective timestamps are allocated to the respective temporal partitions, the value changes in the at least one attribute at the plural timestamps are computed within each partition using the respective processors to which each partition is allocated, and the value changes within each partition are aggregated using the respective processors to which each partition is allocated to produce an aggregate value for the query.

20040236724, Nov 25, 2004

May 19, 2003

10/440870

Shu-Yao Chien - Los Angeles CA, US
Xin Zhou - Los Angeles CA, US

G06F007/00

707/003000

A method, computer program, and database system are disclosed for querying a stored element-based document description. The database system includes one or more nodes. Each of the one or more nodes provides access to one or more of a plurality of CPUs. Each of the one or more CPUs provides access to one or more of a plurality of virtual processes. Each virtual process is configured to manage data stored in one of a plurality of data-storage facilities. The data stored in the plurality of data-storage facilities includes data representing a database table. A row of the table corresponds to an element of the element-based document description and includes: data describing the element, an order identifier corresponding to the element, and a range identifier corresponding to the element. The data stored in the plurality of data-storage facilities also includes a tag table with one or more rows including tags and table location data. A query execution program in configured to receive a query specifying at least one tag, compare one of the specified tags with the tag table, identify at least one row of the tag table corresponding to the specified tag, read table location data from the at least one row of the tag table, and output a query response including information from one or more database table rows corresponding to the table location data, each database table row including an order identifier and a range identifier.