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Author: jun-feng song

Displaying records 21 to 30 of 124 records.
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21. An Iterative Image Registration Algorithm by Optimizing Similarity Measurement
Published: 1/1/2010
Authors: Wei Chu, Li Ma, Jun-Feng Song, Theodore Vincent Vorburger
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903937

22. Traceability for Ballistics Signature Measurements in Forensic Science
Published: 12/1/2009
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Susan M Ballou, Li Ma, Thomas B Renegar, Xiaoyu A Zheng, Martin Ols
Abstract: The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 Bullets and 2461 Casings. NIST has also developed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=824703

23. NIST SRM (Standard Reference Material) 2460/2461 Standard Bullets and Casings Project
Published: 10/13/2009
Authors: Jun-Feng Song, Thomas B Renegar, Xiaoyu A Zheng, Robert Meryln Thompson, Richard M Silver, Martin M Ols, Ted T Vorburger
Abstract: The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 Bullets and 2461 Cartridge Cases. NIST has also d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903625

24. GEOMETRIC MEASUREMENT COMPARISONS FOR ROCKWELL DIAMOND INDENTERS
Published: 9/6/2009
Authors: Jun-Feng Song, Samuel Rea Low III, Xiaoyu A Zheng
Abstract: In the uncertainty budget of Rockwell C hardness (HRC) tests, geometric error of the Rockwell diamond indenter is a major contributor. The geometric calibration of Rockwell diamond indenters has been a key issue for Rockwell hardness standardization ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902704

25. 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

26. 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

27. 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

28. 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

29. 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

30. 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



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