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Author: jun-feng song
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Displaying records 1 to 10 of 124 records.
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1. 2D and 3D Surface Texture Comparisons Using Autocorrelation Functions
Published: 1/1/2005
Authors: Jun-Feng Song, Li Ma, Eric Paul Whitenton, Theodore Vincent Vorburger
Abstract: Autocorrelation and cross-correlation functions are proposed for 2D and 3D surface texture comparisons. At the maximum correlaton point of the two correlated surface textrues, there is a peak shown at the cross-correaltion curve. It is proposed to ge ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822017

2. 2D and 3D Surface Texture Comparisons Using Autocorrelation Functions
Published: 1/1/2005
Authors: Jun-Feng Song, Li Ma, Eric Paul Whitenton, Theodore Vincent Vorburger
Abstract: Autocorrelation and cross-correlation functions are proposed for 2D and 3D surface texture comparisons. At the maximum correlation point of the two correlated surface textures, there is a peak shown at the cross-correlation curve. It is proposed to g ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901999

3. A Fast Algorithm for Determining the Gaussian Filter Mean Line in Surface Metrology
Published: 1/1/2000
Authors: Y B Yuan, X F Qiang, Jun-Feng Song, Theodore Vincent Vorburger
Abstract: A fast algorithm for assessing the Gaussian filtered mean line was deduced using the central limit theorem and an approximation method. This algorithm only uses simple computer operations such as addition, subtraction and digit shifting, and avoids ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823110

4. A Fast Algorithm for Determining the Gaussian Filtered Mean Line in Surface Metrology
Published: 1/1/2000
Authors: Y B Yuan, X F Qiang, Jun-Feng Song, Theodore Vincent Vorburger
Abstract: A fast algorithm for assessing the Gaussian filtered mean line was deduced using the central limit theorem and an approximation method. This algorithm only uses simple computer operations such as addition, subtraction and digit shifting, and avoids c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820993

5. A Metric for the Comparison of Surface Topographies of Standard Reference Material (SRM) Bullets and Casings
Published: 10/1/2005
Authors: Jun-Feng Song, Theodore Vincent Vorburger, Li Ma, John M Libert, Susan M Ballou
Abstract: Based on the maximum cross-correlation function, CCFmax, a new parameter called signature difference, Ds, is developed for verifying the similarity of the 2D and 3D ballistics signatures of the standard bullets and of the prototype standard casings. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822360

6. A Metrology Approach to Unifying Rockwell C Hardness Scales
Published: 1/1/1995
Authors: Jun-Feng Song, J Smith, Theodore Vincent Vorburger
Abstract: Current Rockwell C hardness scales (HRC) are unified by performance comparisons. Unless a reliable metrology approach is used for the direct verification of standard hardness machines and diamond indenters, the unified hardness scale may exhibit a sy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820772

7. A Model for Step Height, Edge Slope and Linewidth Measurements Using AFM
Published: 1/1/2003
Authors: Xuezeng Zhao, Theodore Vincent Vorburger, Joseph Fu, Jun-Feng Song, C V Nguyen
Abstract: Nano-scale linewidth measurements are performed in semiconductor manufacturing and in the data storage industry and will become increasingly important in micro-mechanical engineering. With the development of manufacturing technology in recent years, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821974

8. 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

9. A Recursive Algorithm for Gaussian Filtering of Three-Dimensional Engineering Surface Topography
Published: 9/1/2001
Authors: Y B Yuan, Theodore Vincent Vorburger, Jun-Feng Song
Abstract: A recursive algorithm for determining the Gaussian filtered mean surface is presented for measurements of three-dimensional (3-D) engineering surface topography. This algorithm requires a relatively small number of simple mathematical operations such ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821617

10. A Simplified Realization for the Gaussian Filter in Surface Metrology
Published: 1/1/2000
Authors: Y B Yuan, Theodore Vincent Vorburger, Jun-Feng Song, Thomas B Renegar
Abstract: A simplified realization for the Gaussian filter in surface metrology is presented in this paper. The sampling function sinu/u is used for simplifying the Gaussian function. According to the central limit theorem, when n approaches infinity, the f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820991



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