Modeling & simulation research

News and Updates

A woman wearing a face mask works at a laptop with communications equipment on the desk.

Spotlight: Finding the Fix to Wireless Connectivity on the Fritz With Susanna Mosleh

June 29, 2021

When the Wi-Fi is wonky or there’s bad cellphone reception, Susanna Mosleh can’t ignore it. After all, her research at NIST is about finding solutions to those

NIST Publishes a Beginner’s Guide to DNA Origami

January 8, 2021

In a technique known as DNA origami, researchers fold long strands of DNA over and over again to construct a variety of tiny 3D structures, including miniature

A Billion Tiny Pendulums Could Detect the Universe’s Missing Mass

October 13, 2020

Researchers at the National Institute of Standards and Technology (NIST) and their colleagues have proposed a novel method for finding dark matter, the cosmos’s

Projects and Programs

Optical and Optoelectronic Materials Characterization

This project aims to develop rigorous measurements and methodology needed for determining optical and electrical properties of advanced materials that might be

Computational Micromagnetics

NIST researchers develop simulation tools to support modeling, measurement and fundamental understanding of micromagnetic physics.

Metrology for Multi-Physics AM Model Validation

Multi-physics models are necessary to simulate, study, and optimize metal additive manufacturing (AM) processes, such as powder bed fusion (PBF) and directed

Sub-Surface Elastic Depth-Profiling by Intermittent-Contact Resonance Atomic Force Microscopy

The Intermittent Contact Resonance AFM (ICR-AFM) technique aims to add 3D mechanical property mapping to the surface topographies generated during force

Publications

Reinforcement Learning Based Optimal Tracking Control UnderUnmeasurable Disturbances with Application to HVAC Systems

June 18, 2021

Author(s)

Syed Ali Asad Rizvi, Amanda Pertzborn, Zongli Lin

This work presents the design of an optimal disturbance rejecting tracking controller based on reinforcement learning. The problem involves finding the optimal

Microscale Structure to Property Prediction for Additively Manufactured IN625 through Advanced Identification of Material Law

May 11, 2021

Author(s)

Sourav Saha, Orion Kafka, Ye Lu, Cheng Yu, Wing Kam Liu

Challenge 4 of the Air Force Research Laboratory (AFRL) Additive Manufacturing Modeling Challenge Series asks the participants to predict the grain-average

Generative Adversarial Network Performance in Low-Dimensional Settings

April 20, 2021

Author(s)

Felix M. Jimenez, Amanda Koepke, Mary Gregg, Michael R. Frey

A generative adversarial network (GAN) is an artificial neural network with a distinctive training architecture, designed to create examples that faithfully

Simulations of Flow Over an Axisymmetric Hill

February 26, 2021

Author(s)

Rikhi Bose, DongHun Yeo

In this report, high-Reynolds number turbulent flow around an axisymmetric hill is studied using large eddy and unsteady Reynolds averaged Navier-Stokes

Software

Smart Investment Tool

June 16, 2021

This tool calculates metrics for investment analysis documented in NIST Advanced manufacturing Series 200-5. It calculates net present value, internal rate of

HVAC SIMulation PLUS other systems (HVACSIM+)

May 11, 2021

The first version of HVACSIM+, which stands for “HVAC SIMulation PLUS other systems”, was introduced by National Institute of Standards and Technology (NIST) in

Network Modeling Software

This software is a set of NetworkX additions for the creation of graphs to model networks.Graphicality Testing -- This is a set of routines for testing if a

VCCTL Software

(Return to Cement Hydration and Degradation Modeling Software) The Virtual Cement and Concrete Testing Laboratory (VCCTL) software provides a virtual

Tools and Instruments

Large Aperture Scanner

The Large Aperture Scanner (LAS) scans a radar transceiver over a 5 meter by 20 meter aperture. Image reconstruction techniques enable a three-dimensional

Awards

Xiao Tang - 2016 Fellow of the American Physical Society

For outstanding contributions in optical technologies and systems, with application to quantum communications, spectrometry, and digital