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Mathematics & Statistics

Modeling & simulation research

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Displaying 251 - 275 of 488

A Tool for Evaluating Fault Detection and Diagnostic Methods for Fan Coil Units

December 6, 2016
Author(s)
Shokouh Pourarian, Jin Wen, Daniel Veronica, Amanda Pertzborn, Xiaohui Zhou, Ran Liu
Dynamic simulation software tools are needed for the research and development of improved methods for automatic control and automated fault detection and diagnosis of heating, ventilation, and air conditioning (HVAC) systems. These tools must generate data

Maximizing Output Power of a CFPG Micro Energy-Harvester for Wearable Medical Sensors

October 31, 2016
Author(s)
Mehdi Dadfarnia, Kamran Sayrafian, Paul Mitcheson, John Baras
Energy Harvesting refers to the process of capturing and storing energy from the ambient environment. Kinetic energy harvested from the human body motion seems to be one of the most convenient and attractive solutions for wearable wireless sensors in

The Algebra of Systems and System Interactions with an application to Smart Grid

October 14, 2016
Author(s)
Charif Mahmoudi, Hasnae Bilil, Edward R. Griffor
Systems are integrations of devices or component elements and even other systems. The notion of a system comprehends engineered and biological or mechanical or physical systems. Examples include information and dynamical systems as well as integrations of

A Library to Enable the Modeling of Optical Imaging of Finite Multi-Line Arrays.

September 30, 2016
Author(s)
Mark Alexander Henn, Bryan M. Barnes
The dataset contains several MATLAB files and input files for the software package JCMsuite that enable the modeling of optical imaging of finite multi-line arrays. (Certain commercial materials are identified in order to specify the experimental procedure

Optimizing Subfield Targets for Nanoscale Quantitative Optical Imaging

September 29, 2016
Author(s)
Mark Alexander Henn, Bryan M. Barnes, Hui Zhou, Martin Y. Sohn, Richard M. Silver
The full 3-D scattered field above finite sets of features has been shown to contain a continuum of spatial frequency information, and with novel optical microscopy techniques and electromagnetic modeling, deep-subwavelength geometrical parameters can be

Identifying uncertainty in laser powder bed fusion additive manufacturing models

September 4, 2016
Author(s)
Felipe F. Lopez, Paul W. Witherell, Brandon M. Lane
As additive manufacturing (AM) matures, models are beginning to take a more prominent stage in design and process planning for AM. A limitation frequently encountered in AM models is a lack of indication about their precision and accuracy. Often overlooked

Investigating predictive metamodeling for additive manufacturing

August 21, 2016
Author(s)
Zhuo Yang, Douglas Eddy, Sundar Krishnamurty, Ian Grosse, Peter O. Denno, Felipe F. Lopez
Additive manufacturing processes offer significant commercial advantages due to unique and advanced process capabilities. Production of metal parts can involve trial and error. This is often due to limited understanding of variability in properties and the

Computer-Aided Molecular Design and Selection of CO2 Capture Solvents Based on Thermodynamics, Reactivity and Sustainability

August 10, 2016
Author(s)
Alexandros Chremos, Athanasios Papadopoulos, Sara Badr, Esther Forte, Theodoros Zarogiannis, Panos Seferlis, Stavros Papadokonstantakis, Amparo Galindo, George Jackson, Claire Adjiman
The identification of improved carbon dioxide (CO2) capture solvents remains a challenge due to the vast number of potentially-suitable molecules. We propose an optimization-based computer- aided molecular design (CAMD) method to identify and select, from

Report from Open Problems Session at OPSFA-13

July 21, 2016
Author(s)
Howard S. Cohl, Richard Askey, Rick Beatson, Charles Dunkl, Christoph Koutschan, Sheehan Olver, Yuan Xu, Wolfgang Zu Castell, Wadim Zudilin, Ted Chihara
We provide the open problems presented at OPSFA-13, Gaithersburg, Maryland, June 4, 2015. Howard Cohl, National Institute of Standards and Technology, has collected these open problems.

Using Category Theory to facilitate multiple manufacturing service database integration

July 20, 2016
Author(s)
Spencer J. Breiner, Albert T. Jones, David I. Spivak, Eswaran Subrahmanian, Ryan Wisnesky
The goal of this paper is to illustrate the use of category theory as a basis for the integration of manufacturing service databases. In this paper we use as our reference prior work by Kolvatunyu, et. al (2013) on the use of Ontology Web Language(OWL)

A STATISTICAL APPROACH TO ESTIMATING A 95 % CONFIDENCE LOWER LIMIT FOR THE DESIGN CREEP RUPTURE TIME VS. STRESS CURVE WHEN THE STRESS ESTIMATE HAS AN ERROR UP TO 2 % (*)

July 17, 2016
Author(s)
Jeffrey T. Fong, James J. Filliben, Nathanael A. Heckert, Pedro V. Marcal, Marvin J. Cohn
Recent experimental results on creep-fracture damage with minimum time to failure (minTTF) varying as the 9th power of stress, and a theoretical consequence that the coefficient of variation (CV) of minTTF is necessarily 9 times that of the CV of the

Advancing X-Ray Scattering Metrology Using Inverse Genetic Algorithms

July 7, 2016
Author(s)
Adam F. Hannon, Daniel F. Sunday, Donald A. Windover, Regis J. Kline
We compare the speed and effectiveness of two genetic optimization algorithms to the results of statistical sampling via a Markov Chain Monte Carlo algorithm to find which is the most robust method for determining real space structure in periodic gratings

Identifying uncertainty in Laser Powder Bed Fusion models

June 30, 2016
Author(s)
Felipe F. Lopez, Paul Witherell, Brandon Lane
A limitation frequently encountered in additive manufacturing (AM) models is a lack of indication about their precision and accuracy. Often overlooked, information on model uncertainty is required for validation of AM models, qualification of AM-produced

Vibrational Modes of Multilayered Ceramic Capacitors

April 28, 2016
Author(s)
Kirsten L. Peterson, Ward L. Johnson, Sudook A. Kim, Paul R. Heyliger
Micron-scale spacing of interleaved electrodes and high-dielectric ceramics in multilayer ceramic capacitors (MLCCs) provide exceptionally high capacitances in small volumes. This has led to MLCCs being the preferred type of capacitor in a wide range of

Shape Retrieval of Non-Rigid 3D Human Models

April 26, 2016
Author(s)
Afzal A. Godil, David Pickup
3D models of humans are commonly used within computer graphics and vision, and so the ability to distinguish between body shapes is an important shape retrieval problem. We extend our recent paper which provided a benchmark for testing non-rigid 3D shape

Bayesian Calibration of Transferable, Coarse-Grained Force Fields

April 15, 2016
Author(s)
Thomas W. Rosch, Frederick R. Phelan Jr., Paul Patrone
Generating and calibrating forces that are transferable across a range of state-points remains a challenging problem in coarse-grained (CG) molecular dynamics (MD). In this work, we present a Bayesian correction algorithm, inspired by ideas from
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