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Topic Area: Metrology

Displaying records 1 to 10 of 856 records.
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1. An improved L1 based algorithm for standardized planar datum establishment
Topic: Metrology
Published: 10/1/2014
Authors: Craig M Shakarji, Vijay Srinivasan
Abstract: This paper has two major goals. First, we present an algorithm for establishing planar datums suitable for a default in tolerancing standards. The algorithm is based on a constrained minimization search based on the L_1 (L1) norm after forming a conv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916075

2. Performance Metrics for Evaluating Object and Human Detection and Tracking Systems
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7972
Topic: Metrology
Published: 7/31/2014
Authors: Afzal A Godil, Roger V Bostelman, William P Shackleford, Tsai Hong Hong, Michael O Shneier
Abstract: In this report, we provide an overview of various performance evaluation metrics for object detection and tracking for robot safety applications in smart manufacturing. We present four different types of performance evaluation metrics based on detect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914820

3. Dielectric characterization by microwave cavity perturbation corrected for non-uniform fields
Topic: Metrology
Published: 7/23/2014
Authors: Nathan Daniel Orloff, Jan Obrzut, Christian John Long, Thomas Fung Lam, James C Booth, David R Novotny, James Alexander Liddle, Pavel Kabos
Abstract: The non-uniform fields that occur due to the slot in the cavity through which the sample is inserted and those due to the sample geometry itself decrease the accuracy of dielectric characterization by cavity perturbation at microwave frequencies. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915011

4. Fiber orientation angle effects in machining of unidirectional CFRP laminated composites
Topic: Metrology
Published: 6/13/2014
Authors: Viswanathan Madhavan, Gary Lipczynski, Brandon M Lane, Eric Paul Whitenton
Abstract: Experiments were carried out at the National Institute of Standards and Technology, in collaboration with The Boeing Company, to obtain force and temperature data as a function of feed, speed and fiber orientation angle (FOA), for validation of finit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915409

5. Uncertainty in Measurement of the Maximum Cutting Tool Temperature by Infrared Thermography
Topic: Metrology
Published: 6/13/2014
Authors: Brandon M Lane, Eric Paul Whitenton, Viswanathan Madhavan, M Alkan Donmez
Abstract: This paper presents an analysis of the uncertainty in measurement of the peak temperature on the side face of a cutting tool by infrared thermography. An analytical method uses the temperature measurement equation to study the uncertainty arising f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915534

6. Control Fusion for Safe Multi-robot Coordination
Topic: Metrology
Published: 5/9/2014
Authors: Roger V Bostelman, Jeremy A Marvel
Abstract: Future smart manufacturing systems will include more complex coordination of mobile manipulators (e.g., robot arms mounted on mobile bases). The National Institute of Standards and Technology, Performance of Collaborative Robot Systems Project has b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915915

7. Metrological challenges introduced by new tolerancing standards
Topic: Metrology
Published: 2/13/2014
Authors: Edward P Morse, Yue Peng, Vijay Srinivasan, Craig M Shakarji
Abstract: The recent release of ISO has provided designers with a richer set of specification tools for the size of part features, so that various functional requirements can be captured with greater fidelity [2]. However, these tools also bring new challenges ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916214

8. Uncertainty of temperature measurements by infrared thermography for metal cutting applications
Topic: Metrology
Published: 12/31/2013
Authors: Brandon M Lane, Eric Paul Whitenton, Viswanathan Madhavan, M Alkan Donmez
Abstract: This paper presents the methodology and results of a comprehensive measurement uncertainty analysis for infrared thermography of a cutting tool during the metal cutting process. The analysis is based on a commercial off-the-shelf (COTS) camera, ty ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913632

9. Theory and Algorithms for L1 Fitting Used for Planar Datum Establishment in Support of Tolerancing Standards
Topic: Metrology
Published: 10/15/2013
Authors: Craig M Shakarji, Vijay Srinivasan
Abstract: We present the theory and algorithms for establishing a datum plane consistent with ASME Y14.5 standard definitions corresponding to a planar datum feature sampled with coordinate data that is weighted,. The method uses a one-sided minimization searc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913789

10. How Does the Smart Grid Measure Up? Metrology Research at NIST Looks for Answers
Topic: Metrology
Published: 10/7/2013
Author: David A Wollman
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914681



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