Dev G Rajnarayan

20120245910, Sep 27, 2012

Mar 22, 2011

13/069374

Dev RAJNARAYAN - Mountain View CA, US
Peter Sturdza - Redwood City CA, US

DESKTOP AERONAUTICS, INC. - Palo Alto CA

G06G 7/57

703 9

A prediction of whether a point on a computer-generated surface is adjacent to laminar or turbulent flow is made using a transition prediction technique. A plurality of boundary-layer properties at the point are obtained from a steady-state solution of a fluid flow in a region adjacent to the point. A plurality of instability modes are obtained, each defined by one or more mode parameters. A vector of regressor weights is obtained for the known instability growth rates in a training dataset. For each instability mode in the plurality of instability modes, a covariance vector is determined, which is the covariance of a predicted local growth rate with the known instability growth rates. Each covariance vector is used with the vector of regressor weights to determine a predicted local growth rate at the point. Based on the predicted local growth rates, an n-factor envelope at the point is determined.

20130282629, Oct 24, 2013

Mar 26, 2013

13/850628

Dev Rajnarayan - Mountain View CA, US
Peter Sturdza - Redwood City CA, US

AERION CORPORATION - Reno NV

G06F 17/50
G06N 99/00

706 12

In accordance with embodiments disclosed herein, there are provided methods, systems, and apparatuses for predicting whether a point on a computer-generated aircraft or vehicle surface is adjacent to laminar or turbulent flow is made using a transition prediction technique. A plurality of boundary-layer properties at the point are obtained from a steady-state solution of a fluid flow in a region adjacent to the point. Included in the list of boundary-layer properties are computed coefficients or weights of mode shapes that describe the boundary-layer profiles. A plurality of instability modes are obtained, each defined by one or more mode parameters. A vector of regressor weights is obtained for the known instability growth rates in a training dataset. For each instability mode in the plurality of instability modes, a covariance vector is determined, which is the covariance of a predicted local growth rate with the known instability growth rates. Each covariance vector is used with the vector of regressor weights to determine a predicted local growth rate at the point. Based on the predicted local growth rates, an n-factor envelope at the point is determined.

20220300673, Sep 22, 2022

Feb 9, 2022

17/668222

Joseph J. Luzinski - Fort Lauderdale FL, US
Bharath Mukundakrishnan - San Jose CA, US
Sushrut S. Pavanaskar - Castro Valley CA, US
Dev G. Rajnarayan - Mountain View CA, US

G06F 30/15
B64F 5/00
G06F 30/20

Techniques and systems for creating and performing analysis on three-dimensional computer models are described. The model creation and analysis may be specified using an un-compiled script that includes a set of instructions. The set of instructions may implement a computer-aided design (CAD) kernel using a bridge layer that includes compiled bridge code. The instructions may be used to create a job set having a group of tasks. Using the job set, a processing queue may be constructed, the processing queue having a subset of common tasks prioritized within the processing queue. Subsets or groups of tasks or instructions may also be executed in parallel using multiple distinct processors or a multi-threaded processor.

20190005185, Jan 3, 2019

Jun 29, 2018

16/023162

- Reno NV, US
Bharath Mukundakrishnan - San Jose CA, US
Sushrut S. Pavanaskar - Castro Valley CA, US
Dev G. Rajnarayan - Mountain View CA, US

G06F 17/50
B64F 5/00

Techniques and systems for creating and performing analysis on three-dimensional computer models are described. The model creation and analysis may be specified using an un-compiled script that includes a set of instructions. The set of instructions may implement a computer-aided design (CAD) kernel using a bridge layer that includes compiled bridge code. The instructions may be used to create a job set having a group of tasks. Using the job set, a processing queue may be constructed, the processing queue having a subset of common tasks prioritized within the processing queue. Subsets or groups of tasks or instructions may also be executed in parallel using multiple distinct processors or a multi-threaded processor.

20180293792, Oct 11, 2018

Apr 5, 2018

15/946572

- Reno NV, US
Bharath Mukundakrishnan - San Jose CA, US
Raymond P. D'Antuono - El Cerrito CA, US
Dev G. Rajnarayan - Mountain View CA, US

G06T 17/20
G06T 15/50
G06T 15/04
G06T 19/20
G06F 17/30

This disclosure provides a method for providing spatial gradients of 3D CAD models of solid objects with respect to various parameters used in defining the solid object. A modeler is designed and implemented to provide spatial gradients of solid objects (when represented on a computer as 3D CAD models) with respect to the various parameters that define the objects. Although primarily based on finite difference operations, several additional steps are performed to ensure that the gradients computed are correct and valid for a general class of solid objects and the parameters that define the objects. No commercially available 3D CAD tool provides such ability for a general class of solid objects.

20170045417, Feb 16, 2017

Oct 26, 2016

15/335303

Dev Rajnarayan - Mountain View CA, US
Peter Sturdza - Redwood City CA, US

Aerion Corporation - Reno NV

G01M 9/06
G06F 17/50
G01M 9/08

In accordance with embodiments disclosed herein, there are provided methods, systems, and apparatuses for predicting whether a point on a computer-generated aircraft or vehicle surface is adjacent to laminar or turbulent flow is made using a transition prediction technique. A plurality of boundary-layer properties at the point are obtained from a steady-state solution of a fluid flow in a region adjacent to the point. Included in the list of boundary-layer properties are computed coefficients or weights of mode shapes that describe the boundary-layer profiles. A plurality of instability modes are obtained, each defined by one or more mode parameters. A vector of regressor weights is obtained for the known instability growth rates in a training dataset. For each instability mode in the plurality of instability modes, a covariance vector is determined, which is the covariance of a predicted local growth rate with the known instability growth rates. Each covariance vector is used with the vector of regressor weights to determine a predicted local growth rate at the point. Based on the predicted local growth rates, an n-factor envelope at the point is determined.

20150012248, Jan 8, 2015

Jul 1, 2014

14/321707

- San Jose CA, US
Tom Waite - El Sobrante CA, US
Dev Rajnarayan - Mountain View CA, US

G06F 3/01

702189

A processing apparatus including one or more processors and memory receives sensor measurements generated by one or more sensors of one or more devices, pre-classifies the sensor measurements as belonging to one of a plurality of pre-classifications, and selects one or more feature types to extract from the sensor measurements based at least in part on the pre-classification of the sensor measurements. The processing apparatus also extracts features of the one or more selected feature types from the sensor measurements and determines a state of a respective device of the one or more devices in accordance with a classification of the sensor measurements determined based on the one or more features extracted from the sensor measurements.

20140149060, May 29, 2014

Nov 26, 2013

14/090966

- San Jose CA, US
Dev Rajnarayan - Mountain View CA, US
James V. Steele - Los Gatos CA, US
Ian Chen - Campbell CA, US

Sensor Platforms, Inc. - San Jose CA

G01C 25/00

702 94

A processing apparatus including one or more processors and memory obtains one or more sensor measurements generated by one or more monitoring sensors of one or more devices, including one or more monitoring sensor measurements from a respective monitoring sensor of a respective device and obtains one or more system signals including a respective system signal corresponding to current operation of the respective device. The processing apparatus determines device context information for the respective device based on the one or more sensor measurements and the one or more system signals and adjusts operation of the device in accordance with the device context information.