Lin A Chen

US Patent:

8352215, Jan 8, 2013

Filed:

Oct 23, 2009

Appl. No.:

12/604631

Inventors:

Lin (Colin) Chen - Rockville MD, US
Steve Krueger - Raleigh NC, US
Christopher D. Bailey - Cary NC, US

Assignee:

SAS Institute Inc. - Cary NC

International Classification:

G06F 17/18
G06F 19/00

US Classification:

702179

Abstract:

Systems and methods are provided for performing an estimation using an iteratively reweighted least squares technique on a scenario defined by a design matrix, a response variable vector, and a parameter to be estimated. A system and method can be configured to include a root data processor, where a least squares estimate is calculated by the root data processor during each of a plurality of processing iterations. A plurality of node data processors can also be configured to: update values of a weight matrix according to a current state of the least squares estimate, determine a first intermediate value based on the design matrix and the weight matrix, determine a second intermediate value based on the design and weight matrices and the response variable vector. The root data processor calculates an updated least squares estimate based on the intermediate values.

US Patent:

20160048374, Feb 18, 2016

Filed:

Aug 18, 2014

Appl. No.:

14/461890

Inventors:

- San Diego CA, US
Andrew Evan Gruber - Arlington MA, US
Chiente Ho - Santa Clara CA, US
Stewart Griffin Hall - San Diego CA, US
Lin Chen - San Diego CA, US

International Classification:

G06F 7/57
G06F 5/01

Abstract:

At least one processor may emulate a fused multiply-add operation for a first operand, a second operand, and a third operand. The at least one processor may determine an intermediate value based at least in part on multiplying the first operand with the second operand, determine at least one of an upper intermediate value or a lower intermediate value, wherein determining the upper intermediate value comprises rounding, towards zero, the intermediate value by a specified number of bits, and wherein determining the lower intermediate value comprises subtracting the intermediate value by the upper intermediate value, determine an upper value and a lower value based at least in part on adding or subtracting the third operand to one of the upper intermediate value or the lower intermediate value, and determine an emulated fused multiply-add result by adding the upper value and the lower value.

US Patent:

20150379680, Dec 31, 2015

Filed:

Jun 26, 2014

Appl. No.:

14/316391

Inventors:

- San Diego CA, US
Andrew Evan Gruber - Arlington MA, US
Lin Chen - San Diego CA, US

International Classification:

G06T 1/60
G06T 7/40
G06T 15/80

Abstract:

Techniques are described for determining whether data of a variable for each of a plurality of graphics items is same. If determined that the data is the same, the techniques store the data in a storage location of a specialized shared general purpose register that is associated with the variable.