Quantitative comparison of measurement quality of cross-correlation based particle velocity instruments in different gas fluidization regimes

2021 ◽  
Author(s):  
Hongliang Xiao ◽  
Yongmin Zhang ◽  
Yiyang Hua ◽  
Adefarati Oloruntoba
Keyword(s):  
Particle Velocity ◽  
Cross Correlation ◽  
Quantitative Comparison ◽  
Measurement Quality ◽  
Gas Fluidization

scholarly journals Identification of the State of Electrical Appliances with the Use of a Pulse Signal Generator

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 673
Author(s):  
Augustyn Wójcik ◽  
Piotr Bilski ◽  
Robert Łukaszewski ◽  
Krzysztof Dowalla ◽  
Ryszard Kowalik
Keyword(s):  
Measurement System ◽  
Cross Correlation ◽  
Pulse Signal ◽  
Signal Generator ◽  
Experimental Results ◽  
The Novel ◽  
End User ◽  
Standard Classification ◽  
Electrical Appliance

The paper presents the novel HF-GEN method for determining the characteristics of Electrical Appliance (EA) operating in the end-user environment. The method includes a measurement system that uses a pulse signal generator to improve the quality of EA identification. Its structure and the principles of operation are presented. A method for determining the characteristics of the current signals’ transients using the cross-correlation is described. Its result is the appliance signature with a set of features characterizing its state of operation. The quality of the obtained signature is evaluated in the standard classification task with the aim of identifying the particular appliance’s state based on the analysis of features by three independent algorithms. Experimental results for 15 EAs categories show the usefulness of the proposed approach.

Exploring the Measurement Quality of an Attitudinal Scale of Street Code-Related Violence: Similarities and Differences Across Groups and Contexts

2010 ◽  
Vol 8 (3) ◽  
pp. 187-212 ◽  
Author(s):  
Terrance J. Taylor ◽  
Finn-Aage Esbensen ◽  
Bradley T. Brick ◽  
Adrienne Freng
Keyword(s):  
Age Groups ◽  
Social Contexts ◽  
Measurement Quality ◽  
Code Of The Streets ◽  
Scant Attention ◽  
Race Ethnicity ◽  
Similarities And Differences ◽  
Using Data ◽  
Demographic Subgroups

Elijah Anderson’s ‘‘code of the streets’’ has received considerable attention as a promising approach to understanding youths violence. One area which has received scant attention, however, is the measurement quality of the street code concept. Using data collected from more than 3,300 middle school youths residing in seven geographically and demographically diverse U.S. cities between 2007 and 2009, the authors seek to answer the following questions: (a) What are the psychometric properties of the attitudes toward street code-related violence scale (in terms of dimensionality and internal consistency) across demographic subgroups (i.e., race/ethnicity, sex, and age groups) and social contexts (i.e., cities)? and (b) To what extent does the level of acceptance of the attitudes associated with street code-related violence vary across demographic subgroups and social contexts? Results illustrate that the scale performs similarly across groups and contexts, but the actual level of acceptance of street code-related violence varies considerably.

Quantitative comparison of the microstructural quality of two classes of commercial soft triboalloys

2008 ◽  
Vol 59 (3) ◽  
pp. 312-320 ◽  
Author(s):  
Rafael Schouwenaars ◽  
Victor H. Jacobo ◽  
Armando Ortiz
Keyword(s):  
Quantitative Comparison

Analysis of an Adaptive Strain Estimation Technique in Elastography

2002 ◽  
Vol 24 (2) ◽  
pp. 109-118 ◽  
Author(s):  
S. Srinivasan ◽  
F. Kallel ◽  
R. Souchon ◽  
J. Ophir
Keyword(s):  
Experimental Data ◽  
Quantitative Analysis ◽  
Quantitative Comparison ◽  
Estimation Technique ◽  
Echo Signal ◽  
Initial Displacement ◽  
Estimation Techniques ◽  
Strain Estimation ◽  
Proof Of Principle

Elastography is based on the estimation of strain due to tissue compression or expansion. Conventional elastography involves computing strain as the gradient of the displacement (time-delay) estimates between gated pre- and postcompression signals. Uniform temporal stretching of the postcompression signals has been used to reduce the echo-signal decorrelation noise. However, a uniform stretch of the entire postcompression signal is not optimal in the presence of strain contrast in the tissue and could result in loss of contrast in the elastogram. This has prompted the use of local adaptive stretching techniques. Several adaptive strain estimation techniques using wavelets, local stretching and iterative strain estimation have been proposed. Yet, a quantitative analysis of the improvement in quality of the strain estimates over conventional strain estimation techniques has not been reported. We propose a two-stage adaptive strain estimation technique and perform a quantitative comparison with the conventional strain estimation techniques in elastography. In this technique, initial displacement and strain estimates using global stretching are computed, filtered and then used to locally shift and stretch the postcompression signal. This is followed by a correlation of the shifted and stretched postcompression signal with the precompression signal to estimate the local displacements and hence the local strains. As proof of principle, this adaptive stretching technique was tested using simulated and experimental data.

Quality of life research in neuro-oncology: a quantitative comparison

2013 ◽  
Vol 116 (2) ◽  
pp. 333-340 ◽  
Author(s):  
Elizabeth Klein ◽  
David Altshuler ◽  
Abhirami Hallock ◽  
Nicholas Szerlip
Keyword(s):  
Quality Of Life ◽  
Quantitative Comparison ◽  
Quality Of Life Research
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