Results 281 to 290 of about 4,575,316 (321)

Bias correction in clustering coefficient estimation

2017 IEEE International Conference on Big Data (Big Data), 2017
Clustering coefficient (C) is an important structural property to understand the complex structure of a graph. Calculating C is a computationally intensive task. Thereby, sampling-based methods have attracted substantial research for estimating C, and the closely related metric, the number of triangles.
Roohollah Etemadi, Jianguo Lu
openaire   +1 more source

Performance Enhancement of Fiber Optic and Optical Wireless Communication Channels by Using Forward Error Correction Codes

Journal of optical communications, 2019
The study has outlined the different correction codes based optical wireless communication channel and security management in free space optics communication systems.
I. Amiri, A. Rashed, A. S. Parvez, B. K. Paul, K. Ahmed   +4 more
semanticscholar   +1 more source

Correction coefficients for uniform channel flow

Canadian Journal of Civil Engineering, 1991
The kinetic energy and momentum correction coefficients are considered. After a review of pertinent literature, the discussion is restricted to uniform open channel flow. It is found both theoretically and experimentally that the coefficients depend significantly on the Manning roughness coefficient, and that the kinetic energy correction coefficient ...
Damei Li, Willi H. Hager
openaire   +1 more source

Which absorption coefficients are correct?

The Journal of the Acoustical Society of America
Each year absorptive material samples are sent to various accredited acoustic laboratories around the country by manufacturers who want to verify the performance of their products. Results are published as indisputable validation of the product absorption performance by the manufacturer. As no recent interlaboratory study results for ASTM C423—Standard
openaire   +1 more source

Inferential Procedures for Correlation Coefficients Corrected for Attenuation

Psychometrika, 1988
A model and computational procedure based on classical test score theory are presented for determination of a correlation coefficient corrected for attenuation due to unreliability. Next, variance-covariance expressions for the sample estimates defined earlier are derived, based on application of the delta method.
Hakstian, A. Ralph, Schroeder, Marsha L., Rogers, W. Todd   +2 more
openaire   +1 more source

Point target correction coefficients for absolute SAR calibration

2011 IEEE International Instrumentation and Measurement Technology Conference, 2011
A synthetic aperture radar (SAR) system measures the radar reflectivity of the earth's surface for a multitude of scientific and commercial applications. In many cases, accurate absolutely calibrated images are required by end-users. The backscattering from man-made point targets like passive corner reflectors and active transponders is often used as a
Döring, Björn J., Looser, Philipp, Jirousek, Matthias, Schwerdt, Marco   +3 more
openaire   +2 more sources

Temporal stability of regression‐based electrooculographic correction coefficients

Psychophysiology, 2010
AbstractA means of accounting for ocular artifact in the electroencephalograph (EEG) is to subtract portions (Bs) of ocular voltage measured by the electrooculograph (EOG) from the EEG. Some such EOG correction methods calculate Bs at one time and use these to correct data recorded at a different time; these require information about the temporal ...
Pham, Trieu, Croft, Rodney, Cadusch, Peter   +2 more
openaire   +3 more sources

Calculation and validation of the use of effective attenuation coefficient for attenuation correction in In-111 SPECT.

Medical Physics (Lancaster), 2005
Nuclear medicine tracers using 111In as a radiolabel are increasing in their use, especially in the domain of oncologic imaging. In these applications, it often is critical to have the capability of quantifying radionuclide uptake and being able to ...
Youngho Seo, Kenneth H. Wong, B. Hasegawa   +2 more
semanticscholar   +1 more source

Corrected Fresnel coefficients for lossy materials

2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011
The Fresnel Equations that describe the transmitted and reflected waves at an interface between materials with different dielectric and/or magnetic properties are re-examined. A subtle error is discovered in the well known derivation of these formulas for lossy materials.
openaire   +1 more source

Distortion Correction in Anomalous Absorption Coefficients

physica status solidi (b), 1967
AbstractBased on a recent theory of X‐ray diffraction by a distorted crystal completed by the present author, the temperature and distortion corrections in anomalous absorption coefficients have been studied in the case of a single symmetric Bragg reflection in transmission (symmetrical Laue case).
openaire   +1 more source