نتایج جستجو برای: data scattering

تعداد نتایج: 2505792  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1370

the subjects of the study are only the tefl teachers and students at gilan university. to obtain the desired data, a questionnaire which was based on the theories and disecussions gathered, was used as the main data gathering instrument. to determine the degree of relationship between variables, covariance and pearson product moment correlation coefficient were the formulas applied. the data we...

Introduction:In PET imaging, one or both of two annihilation photons may change the direction before reaching the detector due to Compton scattering interaction in body. .Methods:This article, a Monte Carlo simulation study, examined the effect of soft tissue on this error.In this work, the PET BiographTM 6 scanner, a simple geometry of soft tissue -including a sphere of soft tissue in center ...

Akram Abehesht Saeed Sarkar Seyed Hassan Firouzabadi

By identifying the effect of any parameter such as distance, attenuation and scattering on the Line Spread Function (LSF), one can compensate the quantitative and qualitative destructive effect of such parameters by deconvolution method. Using a 99mTC line source, this study was performed on a single head ADAC SPECT system operating in planar mode. Variation of FWTM and FWHM and LSFs as a...

2004
Tobias Fütterer Gerrit A. Vliegenthart Peter R. Lang Iwan Stranski

We calculate scattering curves from Janus micelles based on a new particle scattering factor which we tested against Monte-Carlo simulations. If we compare scattering data from Janus micelles with data of core shell particles, we find that it is virtually impossible to distinguish the particle scattering factors of the two structures, if the scattering length densities of the respective segment...

2013
Gavin A.M.W. Steininger Stan E. Dosso Jan Dettmer Charles W. Holland

The long-term goals of this work are to improve ocean acoustic reverberation modeling and sonar performance predictions in shallow waters by developing inversion procedures to estimate seabed scattering and geoacoustic properties with uncertainties, as well as investigating the importance of various scattering processes. Important issues include: investigating the angular and frequency dependen...

Journal: :Remote Sensing 2016
Tobias Ullmann Andreas Schmitt Thomas Jagdhuber

This study investigates a two component decomposition technique for HH/VV-polarized PolSAR (Polarimetric Synthetic Aperture Radar) data. The approach is a straight forward adaption of the Yamaguchi decomposition and decomposes the data into two scattering contributions: surface and double bounce under the assumption of a negligible vegetation scattering component in Tundra environments. The dep...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2006

Journal: :Acta Crystallographica Section A Foundations and Advances 2017

Journal: :Nuclear Physics B - Proceedings Supplements 2009

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