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Mathematics & Statistics

Modeling & simulation research

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Displaying 151 - 175 of 488

Infrastructure for Model Based Analytics for Manufacturing

December 9, 2019
Author(s)
Sanjay Jain, Anantha Narayanan Narayanan, Yung-Tsun Lee
Multi-resolution simulation models of manufacturing system, such as the virtual factory, coupled with analytics offer exciting opportunities to manufacturers to exploit the increasing availability of data from their corresponding real factory at different

On Practice and Theory of Constructive Composite Geometry and Topology

November 25, 2019
Author(s)
Thomas D. Hedberg Jr., Allison Barnard Feeney, Vijay Srinivasan
This paper synthesizes a theory from industrial best practices codified in recent standards. Recent editions of ASME and ISO standards codify the evolving industrial best practices in defining and modeling the information about products made from fibrous

Forced Edges and Graph Structure

November 19, 2019
Author(s)
Brian D. Cloteaux
For a degree sequence, its set of forced edges are the edges that appear in every realization of that sequence, while its forbidden edges appear in no realization. We examine sequences with forced or forbidden edges, showing relationships between these

Geometry Entrapment in Walk-on-Subdomains

November 19, 2019
Author(s)
Walid Keyrouz, Preston Hamlin, W. J. Thrasher, Michael V. Mascagni
One method of computing the electrostatic energy of a biomolecule in a solution combines the Walk-On-Spheres and Walk-On-Subdomains Monte Carlo algorithms. In the course of examining an implementation of this method, a performance issue was discovered in

Design of an intelligent PYTHON code to run coupled and license-free finite-element and statistical analysis software for calibration of near-field scanning microwave microscopes

October 2, 2019
Author(s)
Jeffrey T. Fong, N. Alan Heckert, James Filliben, Pedro V. Marcal, Samuel Berweger, Thomas Mitchell (Mitch) Wallis, Pavel Kabos
To calibrate near-field scanning microwave microscopes (NSMM) for defect detection and characterization in semiconductors, it is common to develop a parametric finite element analysis (FEA) code to guide the microscope user on how to optimize the settings

Platform-Independent Debugging of Physical Interaction and Signal Flow Models

September 16, 2019
Author(s)
Mehdi Dadfarnia, Raphael Barbau
Systems engineering tools are used to organize development activities of a wide variety ofen gineers, many of which develop their own discipline-specific simulation models. To increase the efficiency of this process, systems modeling tools have been

Users Guide to Type277 Loosely Coupled Integration of TRNSYS with Java

August 13, 2019
Author(s)
Farhad Omar
The purpose of this document is to provide instructions for using a newly developed TRNSYS component (Type277). Type277 enables the loosely-coupled integration of a TRNSYS model with Java software environments using socket communication. The bi-directional

DESIGN OF AN INTELLIGENT PYTHON CODE FOR VALIDATING CRACK GROWTH EXPONENT BY MONITORING A CRACK OF ZIG-ZAG SHAPE IN A CRACKED PIPE

July 27, 2019
Author(s)
Jeffrey T. Fong, Pedro V. Marcal, Robert B. Rainsberger, Nathanael A. Heckert, James J. Filliben
When a small crack is detected in a pressure vessel or piping, we can estimate the fatigue life of the vessel or piping by applying the classical law of fracture mechanics for crack growth if we are certain that the crack growth exponent is correct and the

On a generalization of the Rogers generating function

July 14, 2019
Author(s)
Howard Cohl, Roberto Costas-Santos, Tanay Wakhare
We derive a generalized Rogers generating function and corresponding definite integral, for the continuous q-ultraspherical polynomials by applying its connection relation and utilizing orthogonality. Using a recent generalization of the Rogers generating

A Classification Scheme for Wireless Channel Models Across the Development Life Cycle

July 12, 2019
Author(s)
David Michelson, Camillo Gentile, Nada T. Golmie, Jeanne Quimby, Kate Remley, Ken Gracie, Yvo de Jong
Wireless channel models play a critical role at all stages of the product life cycle, from standards development to network deployment. However, the distinctive needs and requirements for the channel models used at each stage of the cycle are rarely

SIS Contagion Avoidance on a Network Growing by Preferential Attachment

June 30, 2019
Author(s)
Brian D. Cloteaux, Vladimir V. Marbukh
The economic and convenience benefits of interconnectivity drive the current explosive growth in networked systems. However, as recent catastrophic contagious failures in numerous large-scale networked infrastructures have demonstrated, interconnectivity

FEA solver integration framework

June 20, 2019
Author(s)
Conrad E. Bock, Jerome Szarazi
Integrating finite element analysis (FEA) with systems engineering (SE) would improve traceability, consistency, and interoperability between SE and FEA activities in multiple engineering disciplines. The first step in achieving this is a software

Reducing Localization Error of Vision-Guided Industrial Robots

June 18, 2019
Author(s)
Marek Franaszek, Geraldine S. Cheok, Jeremy A. Marvel
In many manufacturing applications, such as automated drilling or inspection of large parts, accurate knowledge of both position and orientation is critical. In this paper, a method for reducing robot end-effector position and orientation error is

Optimal Cache Allocation under Network-Wide Capacity Constraint

April 11, 2019
Author(s)
Van Sy Mai, Stratis Ioannidis, Davide Pesavento, Lotfi Benmohamed
Network cache allocation and management are important aspects of an Information-Centric Network (ICN) design, such as one based on Named Data Networking (NDN). We address the problem of optimal cache size allocation and content placement in an ICN in order

Using Distributed Agents to Optimize Thermal Energy Storage

March 14, 2019
Author(s)
Amanda Pertzborn
The Intelligent Building Agents Laboratory (IBAL) at the National Institute of Standards and Technology (NIST) will be used to develop and evaluate advanced control systems for commercial building heating, ventilation, and air conditioning (HVAC)
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