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You searched on: Author: nien zhang

Displaying records 31 to 40 of 72 records.
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31. An Application of Combining Results from Multiple Methods - Statistical Evaluation of Uncertainty for NIST SRM 1508a
Published: 11/1/2006
Authors: Susan Shu Cheng Tai, Adriana Hornikova, Nien F Zhang, Michael James Welch
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904355

32. Uncertainty Analysis for Virtual Cement Measurement
Published: 9/13/2006
Authors: Blaza Toman, Adriana Hornikova, Robert Charles Hagwood, Hung-Kung Liu, Nien F Zhang, Edward Joseph Garboczi, Jeffrey W Bullard
Abstract: Virtual measurements are the outputs of well-defined mathematical models based on theoretical principles and simulation algorithms. The VCCTL (Virtual Cement and Concrete Testing Laboratory) is a software system built by the Material and Construction ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50888

33. Analysis of Sensitivity of VCCTL Measurements to Various Input Quantities
Published: 8/9/2006
Authors: Adriana Hornikova, Blaza Toman, Nien F Zhang, Hung-Kung Liu, Robert Charles Hagwood, Edward Joseph Garboczi, Jeffrey W Bullard
Abstract: Virtual measurements are the outputs of well-defined mathematical models based on theoretical principles and simulation algorithms. The VCCTL (Virtual Cement and Concrete Testing Laboratory) is a software system built by the Material and Construction ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50864

34. Development of a Serum-Based Standard Reference Material with Certified Values for Homocysteine and Folate
Published: 11/1/2005
Authors: Lorna Tregoning Sniegoski, Bryant C Nelson, Mary B Satterfield, Nien F Zhang, Adriana Hornikova, Michael James Welch, Christine M Pfeiffer
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904492

35. An Application of Combining Results from Multiple Methods|Statistical Evaluation of Uncertainty for NIST SRM 1508a
Published: 10/1/2005
Authors: Adriana Hornikova, Nien F Zhang, Michael James Welch, Susan Shu Cheng Tai
Abstract: NIST Standard Reference Materials (SRM) are certified reference materials that are developed at NIST and provided to laboratories (industry, government and academia) for assessment and improvement of measurement quality. SRM 1508a, is re-certified t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50367

36. The Effect of Uncertainty Components Such as Recalibration on the Performance of Quality Control Charts
Published: 5/2/2005
Authors: P Winkel, Nien F Zhang
Abstract: Daily QC measurements of biochemical quantities were recorded during 4 to 5 months while methods and analyser showed no signs of malfunctioning. The time series of QC values were divided into subseries according to reagents or electrolyte diluent lo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151796

37. Statistical Analysis of Key Comparisons with Linear Trends
Published: 8/1/2004
Authors: Nien F Zhang, Hung-Kung Liu, N Sedransk, W Strawderman
Abstract: A statistical analysis for Key Comparisons with linear trend is proposed. The approach has the advantage that it is consistent with the case in which there is no trend. The uncertainties for KCRV and the degrees of equivalence are also provided. As ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50565

38. CCEM-K5 Comparison of 50/60 Hz Power
Published: 7/1/2004
Authors: Nile M. Oldham, Thomas L Nelson, Nien F Zhang, H Liu
Abstract: Electrical standards of low-frequency (50/60 Hz) power at 15 National Metrology Institutes (NMI) were compared to establish the relationship between the electrical units at these laboratories. The results of this comparison are described. The differe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30859

39. Serial Correlation of Quality Control Data -- On the Use of Proper Control Charts
Published: 6/1/2004
Authors: P Winkel, Nien F Zhang
Abstract: Biochemical quality control data have been reported to be autocorrelated. Serial correlation may increase the rate of false alarms and decrease that of true alarms if traditional control charts are used. In this paper, the times series were examine ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151786

40. Statistical Process Control in Biochemical and Hematological Quality Control Data
Published: 5/3/2004
Authors: Nien F Zhang, P Winkel
Abstract: Daily quality control (QC) measurements of common biochemical and hematological quantities were recorded during several months while methods and analyzers showed no signs of malfunctioning.Usually it is assumed that QC data may be described as i.i.d. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151799



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