Yu Zhang

US Patent:

8619498, Dec 31, 2013

Filed:

Jan 26, 2011

Appl. No.:

13/013988

Inventors:

Sheng Xu - Katy TX, US
Yu Zhang - Katy TX, US
Bing Tang - Katy TX, US

Assignee:

Cggveritas Services (U.S.) Inc. - Houston TX

International Classification:

G01V 1/50

US Classification:

367 38

Abstract:

A method for calculating angle domain common image gathers (ADCIGs). The method includes calculating a source wavefield pof a seismic source; calculating a receiver wavefield pof a seismic receiver; applying an algorithm of anti-leakage Fourier transform (ALFT) to transform the source wavefield pto a wavenumber domain; applying the ALFT algorithm to the receiver wavefield to transform the receiver wavefield in the wavenumber domain; determining an imaging condition to the ALFT source and receiver wavefields in the wavenumber domain; computing a reflection angle θ and an azimuth angle φ of the source wavefield pand receiver wavefield pin the wavenumber domain; calculating the ADCIGs in the wavenumber domain; and applying an inverse fast Fourier transform (FFT) to determine the ADCIGs in the space domain.

US Patent:

20100092470, Apr 15, 2010

Filed:

Sep 21, 2009

Appl. No.:

12/563330

Inventors:

Ram S. Bhatt - San Diego CA, US
Rishi S. Bhatt - San Diego CA, US
Yu Zhang - San Diego CA, US

International Classification:

A61K 39/395
C07K 16/00
C07H 21/00
C12P 21/00
G01N 33/566
G01N 33/574
A61P 35/00

US Classification:

4241331, 5303873, 5303911, 536 2353, 435 696, 436501, 435 723

Abstract:

Camelid and shark heavy chain only antibodies and their analogs are disclosed. Methods of making such antibodies and their analogs are also provided. Also provided are kits, and methods of using such antibodies and their analogs in diagnostics, prognostics, therapy, and simultaneous diagnosis and therapy.

US Patent:

20120026833, Feb 2, 2012

Filed:

Jul 26, 2011

Appl. No.:

13/190758

Inventors:

Robert SOUBARAS - Massy Cedex, FR
Yu ZHANG - Katy TX, US

Assignee:

CGGVERITAS SERVICES SA - Massy Cedex

International Classification:

G01V 1/36

US Classification:

367 50

Abstract:

Computing device and method for processing seismic traces to produce an image of a subsurface area. The method includes receiving a series of seismic traces related to the subsurface area and recorded by one or more seismic receivers, wherein the one or more seismic sources are originally generated by a source; applying a phase encoding function to the series of seismic traces, at least a portion of said seismic traces comprise signals reflected by geological interfaces of the subsurface area; applying a 3 dimensional (3D) harmonic-source reverse time migration of the series of seismic traces encoded with the phase encoding function; computing a forward wavefield by solving a first wave equation; computing a backward wavefield by solving a second wave equation; and cross-correlating the forward wavefield with the backward wavefield to generate an image of the subsurface.

US Patent:

20120263015, Oct 18, 2012

Filed:

Apr 9, 2012

Appl. No.:

13/442158

Inventors:

Yu ZHANG - Katy TX, US

Assignee:

CGGVERITAS SERVICES SA - Massy Cedex

International Classification:

G01V 1/34

US Classification:

367 38

Abstract:

A computing device, computing medium and method for generating an image of a tilted orthorhombic medium. The method includes receiving seismic data related to the tilted orthorhombic medium; calculating a wave propagation with a processing device by applying a second-order equation for reverse time migration to the seismic data to generate a tilted orthorhombic wave propagation; and generating the image of the tilted orthorhombic medium based on the tilted orthorhombic wave propagation.

US Patent:

20120275268, Nov 1, 2012

Filed:

Apr 24, 2012

Appl. No.:

13/454547

Inventors:

Bing TANG - Katy TX, US
Sheng XU - Katy TX, US
Yu ZHANG - Katy TX, US

Assignee:

CGGVERITAS SERVICES SA - Massy Cedex

International Classification:

G01V 1/28

US Classification:

367 53

Abstract:

Computer instructions, computing device and method for processing seismic data under-sampled in an angle domain, the seismic data corresponding to a reverse time migration, three-dimensional, angle domain common image gather (ADCIG). The method includes receiving the seismic data; calculating, based on the seismic data, shot and receiver wave-fields with an RTM wave propagation engine; applying a wave-fields decomposition algorithm to obtain a propagation direction for the shot and receiver wave-fields; forming the ADCIG by applying an image condition to the shot and receiver wave-fields; determining that specular energies of the ADCIG are under-sampled around a reflection angle; during the step of forming the ADCIG, extrapolating the specular energies to a neighborhood of the reflection angle; and generating an image of a subsurface that is being surveyed based on the extrapolated specular energies.

US Patent:

20130238249, Sep 12, 2013

Filed:

Mar 7, 2013

Appl. No.:

13/787884

Inventors:

- Massy Cedex, FR
Feng CHEN - Pearland TX, US
Gilles LAMBARE - Saint Fargeau Ponthierry, FR
Yu ZHANG - Katy TX, US

Assignee:

CGGVERITAS SERVICES SA - Massy Cedex

International Classification:

G01V 1/38

US Classification:

702 18

Abstract:

A system and method are described herein for generating a velocity model of returned seismic signals for under-ocean floor environments. The system and method generate a series of source signals, receive a corresponding set of direct signals, reflected signals, and refracted signals, solve a velocity model equation using a full waveform inversion function with respect to the received set of direct signals, reflected signals and refracted signals to minimize a least square misfit function by relaxing a dependency on low frequency reflections in the full waveform inversion function. The system and method then generate the velocity model based on the solution to the velocity model equation, and display the velocity model.

US Patent:

20220413181, Dec 29, 2022

Filed:

Jun 29, 2021

Appl. No.:

17/362501

Inventors:

- Menlo Park CA, US
Nicole Hu - Mountain View CA, US
Feyera Hirpa - Menlo Park CA, US
Wang Zhan - Menlo Park CA, US
Shabaz Patel - Menlo Park CA, US
Samuel Lamont - Menlo Park CA, US
Yi Liu - Menlo Park CA, US
Zhuo Liu - Menlo Park CA, US
Ting Li - Menlo Park CA, US
Yu Zhang - Menlo Park CA, US

International Classification:

G01V 99/00
G06F 30/28
G06F 30/12
G08B 21/18

Abstract:

Methods, systems, and computer programs are presented for determining flood levels within a region. One method includes an operation for detecting an alert generated by one of a riverine, a coastal, or an urban model. Further, the method includes operations for selecting one or more regions for estimating flood data based on the detected alert, and for calculating, by an inundation model, region flood data for each of the selected regions based on outputs from the riverine model, the coastal model, and the urban model. Additionally, the method includes an operation for combining the region flood data for the selected one or more regions to obtain combined flood data. The combined flood data is presented on a user interface, such as on a flood inundation map.

US Patent:

20220416861, Dec 29, 2022

Filed:

Nov 18, 2019

Appl. No.:

17/755817

Inventors:

- San Diego CA, US
Yu ZHANG - San Diego CA, US
Pavan Kumar VITTHALADEVUNI - San Diego CA, US
Yeliz TOKGOZ - San Diego CA, US
Krishna Kiran MUKKAVILLI - San Diego CA, US

International Classification:

H04B 7/06
H04L 1/00

Abstract:

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a first part of a channel state information (CSI) report, wherein the first part includes an indication of whether a value of a second part of the CSI report matches a value of a previous CSI report; and selectively transmit the second part of the CSI report based at least in part on whether the indication indicates that the value of the second part of the CSI report matches the value of the previous CSI report. In some aspects, a UE may determine a modified subband size of the UE, wherein the modified subband size is different than a configured subband size of the UE; and transmit, in a CSI report, an indication regarding the modified subband size to a base station. Numerous other aspects are provided.