Yan Liu

US Patent:

6562628, May 13, 2003

Filed:

Jul 7, 2000

Appl. No.:

09/612113

Inventors:

Yan Liu - Santa Clara CA
Nebojsa Avdalovic - El Dorado Hills CA
Hamish Small - Leland MI

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

G01N 3002

US Classification:

436161, 422 70

Abstract:

A combination electrolytic suppressor and separate eluent generator and method. The suppressor includes a chromatography effluent flow channel, an ion receiving flow channel, and a first suppressor ion exchange barrier therebetween permeable to electrolyte ions but not liquid flow. The effluent from the chromatography effluent compartment flows through the detector, the ion receiving channel, and to an eluent generator. The generator includes a first generator electrode in a first generator electrode chamber, an electrolyte ion reservoir, a first charged generator barrier separating the first eluent generator electrode chamber from the electrolyte ion reservoir, preventing liquid flow but permitting transport of said electrolyte ions, and a second generator electrode on the opposite side of the first generator barrier from the first generator electrode. Fluid flows from the ion receiving flow channel past the second generator electrode. Acid or base electrolytically generated in the first generator electrode chamber flows as an eluent stream to the chromatographic separator.

US Patent:

6610546, Aug 26, 2003

Filed:

Aug 25, 2000

Appl. No.:

09/648377

Inventors:

Yan Liu - Santa Clara CA
Kannan Srinivasan - Sunnyvale CA
Nebojsa Avdalovic - Cuppertino CA
Hamish Small - Leland MI
John M. Riviello - Santa Cruz CA

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

G01N 3002

US Classification:

436161, 436150, 204542, 210656, 2101982, 422 70

Abstract:

An electrolytic suppressor including (a) packing (a suppressor bed of ion exchange resin or a flow-through monolith), (b) an electrode chamber adjacent the suppressor, (c) a first electrode in the electrode chamber, (d) a barrier separating the packing from the first electrode chamber preventing significant liquid flow but permitting transport of ions only of the same charge as the packing, (e) a second electrode in electrical communication with the resin bed, and (f) a recycle conduit between the suppressor outlet port and said electrode chamber. Charged transverse partitions with openings may be included to create a serpentine liquid path. For anion analysis, the method of using the apparatus includes: (a) flowing an aqueous liquid sample stream containing anions to be detected and cation hydroxide through the separator bed, (b) flowing the aqueous effluent from the separator bed through the flow-through packing, (c) flowing the effluent liquid from the suppressor past a detector, (d) recycling said liquid effluent from the detector through a cathode chamber proximate to the packing and separated by the first barrier, and (e) applying an electrical potential between the cathode and the anode. Water is electrolyzed at the anode to cause cations on the cation exchange packing to electromigrate toward the barrier and to be transported across the barrier toward the cathode while water in the cathode chamber is electrolyzed to generate hydroxide ions which combine with the transported cations to form cation hydroxide in the cathode chamber.

US Patent:

6682701, Jan 27, 2004

Filed:

Jul 7, 2000

Appl. No.:

09/612074

Inventors:

Yan Liu - Santa Clara CA
Hamish Small - Leland MI
Nebojsa Avdalovic - San Jose CA

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

G01N 3002

US Classification:

422 99, 422 70, 422 8202, 436150, 436161, 436174, 2101982, 73 6153, 73 6155, 73 6156, 204551, 204647, 205335, 205628, 205633, 205637

Abstract:

Method and apparatus for generating an acid or base, e. g. for chromatographic analysis of anions. For generating a base the method includes the steps of providing a cation source in a cation source reservoir, flowing an aqueous liquid stream through a base generation chamber separated from the cation source reservoir by a barrier (e. g. a charged membrane) substantially preventing liquid flow while providing a cation transport bridge, applying an electric potential between an anode cation source reservoir and a cathode in the base generation chamber to electrolytically generate hydroxide ions therein and to cause cations in the cation source reservoir to electromigrate and to be transported across the barrier toward the cathode to combine with the transported cations to form cation hydroxide, and removing the cation hydroxide in an aqueous liquid stream as an effluent from the first base generation chamber. Suitable cation sources include a salt solution, a cation hydroxide solution or cation exchange resin.

US Patent:

6823016, Nov 23, 2004

Filed:

Feb 20, 1998

Appl. No.:

09/027014

Inventors:

Hungviet Nguyen - Fremont CA
Xiaoping Hu - San Jose CA
Yan Liu - San Jose CA

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

H04B 166

US Classification:

37524025

Abstract:

A method and system for minimizing bus traffic in a video decoder is disclosed. A method and system for processing a portion of a reference picture includes designating the reference picture, selecting a display picture within the reference picture, transmitting a display picture size, and sending a display picture offset. A method and system for compressing IDCT coefficients corresponding to a macroblock, the macroblock having a plurality of blocks, includes locating each non-zero IDCT coefficient corresponding to one of the plurality of blocks, assigning an index to the non-zero IDCT coefficient, the index designating a location within the one of the plurality of blocks, packing the non-zero IDCT coefficient in little endian format, and specifying a terminator bit corresponding to the non-zero coefficient, the terminator bit indicating the end of all non-zero IDCT coefficients for the one of the plurality of blocks. A method and system for selectively controlling each hardware device within a video decoder includes obtaining a video stream, performing VLC decoding, encoding a plurality of instructions to control each hardware device within the video decoder, decoding each one of the plurality of instructions, and optionally performing an IDCT in response to each one of the plurality of instructions.

US Patent:

6955922, Oct 18, 2005

Filed:

Jul 7, 2000

Appl. No.:

09/612118

Inventors:

Yan Liu - Santa Clara CA, US
Hamish Small - Leland MI, US
Nebojsa Avdalovic - San Jose CA, US

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

G01N030/26

US Classification:

436174, 436150, 436161, 422 70, 422 8202, 204551, 204647, 205335, 205633, 205637, 2101982, 210656, 73 6153, 73 6156

Abstract:

Method and apparatus for generating an acid or base, e. g. for chromatographic analysis of anions. For generating a base the method includes the steps of providing a cation source in a cation source reservoir, flowing an aqueous liquid stream through a base generation chamber separated from the cation source reservoir by a barrier (e. g. a charged membrane) substantially preventing liquid flow while providing a cation transport bridge, applying an electric potential between an anode cation source reservoir and a cathode in the base generation chamber to electrolytically generate hydroxide ions therein and to cause cations in the cation source reservoir to electromigrate and to be transported across the barrier toward the cathode to combine with the transported cations to form cation hydroxide, and removing the cation hydroxide in an aqueous liquid stream as an effluent from the first base generation chamber. Suitable cation sources include a salt solution, a cation hydroxide solution or cation exchange resin.

US Patent:

6965229, Nov 15, 2005

Filed:

Aug 1, 2003

Appl. No.:

10/632768

Inventors:

Shanlin Duan - Fremont CA, US
Yan Liu - Cupertino CA, US
Li Tang - Fremont CA, US

Assignee:

Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam

International Classification:

G11B027/36
G01R033/12

US Classification:

324210, 360 31

Abstract:

A method is provided for testing a magnetoresistive sensor for polarity reversal. In one embodiment, the method includes: writing a test pattern on a magnetic disk; providing a mechanical or thermal stress to the magnetoresistive sensor for a period of time; and, comparing the polarity of the test pattern before and after the application of stress.

US Patent:

7153476, Dec 26, 2006

Filed:

Jun 21, 2002

Appl. No.:

10/176879

Inventors:

Yan Liu - Santa Clara CA, US
Hamish Small - Leland MI, US
Nebojsa Avdalovic - San Jose CA, US

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

G01N 30/02
G01N 30/26
G01N 30/28

US Classification:

422 99, 422 70, 422 8202, 436161, 2101982, 204551, 204647, 205335, 205633, 73 6156

Abstract:

Method and apparatus for generating an acid or base, e. g. for chromatographic analysis of anions. For generating a base the method includes the steps of providing a cation source in a cation source reservoir, flowing an aqueous liquid stream through a base generation chamber separated from the cation source reservoir by a barrier (e. g. a charged membrane) substantially preventing liquid flow while providing a cation transport bridge, applying an electric potential between an anode cation source reservoir and a cathode in the base generation chamber to electrolytically generate hydroxide ions therein and to cause cations in the cation source reservoir to electromigrate and to be transported across the barrier toward the cathode to combine with the transported cations to form cation hydroxide, and removing the cation hydroxide in an aqueous liquid stream as an effluent from the first base generation chamber. Suitable cation sources include a salt solution, a cation hydroxide solution or cation exchange resin.

US Patent:

7329346, Feb 12, 2008

Filed:

Feb 23, 2005

Appl. No.:

11/065335

Inventors:

Yan Liu - Santa Clara CA, US
Christopher A. Pohl - Union City CA, US
Nebojsa Avdalovic - Cupertino CA, US
John M. Riviello - Santa Cruz CA, US
Archava Siriraks - Bangkok, TH

Assignee:

Dionex Corporation - Sunnyvale CA

International Classification:

B01D 15/08

US Classification:

2101982, 210635, 210656, 205789, 422 70

Abstract:

A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ion chromatographic system in which the effluent from the detector is recycled to a membrane suppressor and then is mixed with a source of eluent for recycle to the chromatographic column.