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You searched on: Author: jun-feng song

Displaying records 31 to 40 of 130 records.
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31. OPTIMIZING GAUSSIAN FILTER LONG WAVELENGTH CUTOFF »c FOR IMPROVING 3D BALLISTICS SIGNATURE CORRELATIONS
Published: 10/19/2008
Authors: Jun-Feng Song, Li Ma, Theodore Vincent Vorburger, Susan M Ballou
Abstract: In the ballistics measurements and correlations, optimum selection of c has particular importance for an unambiguous extraction of Individual Characteristics from the Class Characteristics . Poorly selected c might result in the Class Character ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824686

32. NIST Microform Calibration System for Rockwell Hardness Standardization
Published: 8/25/2008
Authors: Jun-Feng Song, Samuel Rea Low III, Xiaoyu A Zheng
Abstract: In the uncertainty budget of Rockwell hardness tests, microform geometric errors of the diamond indenter are a major contributor. The microform calibration of Rockwell diamond indenters has been one of the key steps for Rockwell hardness standardiza ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824621

33. Topography Measurements for Determining the Decay Factors in Surface Replication
Published: 7/4/2008
Authors: Jun-Feng Song, P Rubert, Xiaoyu A Zheng, Theodore Vincent Vorburger
Abstract: The electro-forming technique is used at National Institute of Standards and Technology (NIST) for the production of standard reference material (SRM) 2461 standard casings to support nationwide ballistics measurement traceability and measurement q ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823226

34. A Novel Parameter Proposed for 2D and 3D Topography Measurements and Comparisons
Published: 9/1/2007
Authors: Jun-Feng Song, Theodore Vincent Vorburger
Abstract: Based on the cross-correlation function (CCF), a new parameter called profile difference, Ds (or topography difference for 3D), is developed for measurement and comparison of 2D profiles and 3D topographies.  When Ds = 0, the two compared profil ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823236

35. Verifying Measurement Uncertainty Using a Control Chart With Dynamic Control Limits
Published: 9/1/2007
Authors: Jun-Feng Song, Theodore Vincent Vorburger
Abstract: A control chart with dynamic control limit is proposed for promoting the developing process of an uncertainty budget, and verifying the developed measurement uncertainty. The up and low dynamic control limit, 2 sd, is calculated from the updated ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823223

36. Surface Topography Analysis for a Feasibility Assessment of a National Ballistics Imaging Database
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7362
Published: 5/1/2007
Authors: Theodore Vincent Vorburger, James H Yen, B Bachrach, Thomas B Renegar, Li Ma, Hyug-Gyo Rhee, Xiaoyu A Zheng, Jun-Feng Song, Charles Dewey Foreman
Abstract: This document reports on a study to determine the feasibility and utility of a national ballistics database of casing and bullet images. The purpose of such a proposed database would be to provide a reference collection of ballistic images against ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822733

37. Comparison of Optical and Stylus Methods for Measurement of Rough Surfaces
Published: 1/1/2007
Authors: Theodore Vincent Vorburger, H G Rhee, Thomas B Renegar, Jun-Feng Song, Xiaoyu A Zheng
Abstract: Abstract Optical methods are increasingly used for measurement of surface texture, particularly for areal measurements where the optical methods are generally faster. A new Working Group under Technical Committee (TC) 213 in the International Organiz ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824605

38. NIST Standard Bullets and Casings Project
Published: 1/1/2007
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Susan M Ballou, Thomas B Renegar, Li Ma, Eric Paul Whitenton, David R Kelley, Robert A. Clary, A Zheng, M Ols
Abstract: The National INstitute of Standards and Technology (NIST) standard bullets and casings project will provide support to firearm examiners and to the National Integrated Ballistics Information Network (NIBIN) in the United States. The standard bullet i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822141

39. Tolerancing Form Deviations for NIST Standard Reference Material (SRM) 2809 Rockwell Diamond Indenters
Published: 1/1/2007
Authors: Jun-Feng Song, Samuel Rea Low III, Li Ma
Abstract: The National Institute of Standards and technology (NIST) plans to develop Standard Reference Material (SRM) 2809 Rockwell Diamond Indenter to support Rockwell hardness standardization.  Most tolerances of the SRM indenters are adopted from thos ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823240

40. Verifying Measurement Uncertainty Using a Control Chart With Dynamic Control Limits
Published: 1/1/2007
Authors: Jun-Feng Song, Theodore Vincent Vorburger
Abstract: We propose a control chart with dynamic control limits that promotes the process of developing and refining an uncertainty budget and verifying the measurement uncertainty. The upper and lower dynamic control limits, µ +2s and µ - 2s, are ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824602



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  • SP 250-XX: Calibration Services
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