نتایج جستجو برای: heterogeneous sample

تعداد نتایج: 528257  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis, we exploit a simple and suitable method for immobilization of copper(ii) complex of 4?-phenyl-terpyridine on activated multi-walled carbon nanotubes [amwcnts-o-cu(ii)-phtpy]. this nanostructure was characterized by various physico-chemical techniques. to ensure the efficiency and fidelity of copper species, the implementation of three-component strategies in click-chemistry all...

2016
Uri Berger David Anaki

In this study we examined the construct and external validity of the Disgust Scale Revised (Olatunji, Williams, et al., 2007), in a large heterogeneous sample (N = 1427). In addition, we investigated the role of demographic variables on disgust’s sensitivity. The findings reveal that the DS_R adheres to the three-factor structure (i.e., Core disgust, Animal-Reminder Disgust, and Contamination-B...

Journal: :Analytical chemistry 2015
Victòria Beltran Nati Salvadó Salvador Butí Gianfelice Cinque Katia Wehbe Trinitat Pradell

Precise microanalytical techniques are essential in many fields such as cultural heritage materials, showing complex layered microstructures containing a wide range of materials of diverse nature and hardness. Noninvasive sample manipulation and preparation is required to avoid, as much as possible, sample contamination, which may strongly limit the materials identification. The method proposed...

2000
Dragoljub Pokrajac Zoran Obradovic

A boosting-based method for centers placement in radial basis function networks (RBFN) is proposed. Also, the influence of several methods for drawing random samples on the accuracy of RBFN is examined. The new method is compared to trivial, linear and non-linear regressors including the multilayer Perceptron and alternative RBFN learning algorithms and its advantages are demonstrated for learn...

Journal: :Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 2013
Garrick Wallstrom Karen S Anderson Joshua LaBaer

BACKGROUND Modern genomic and proteomic studies reveal that many diseases are heterogeneous, comprising multiple different subtypes. The common notion that one biomarker can be predictive for all patients may need to be replaced by an understanding that each subtype has its own set of unique biomarkers, affecting how discovery studies are designed and analyzed. METHODS We used Monte Carlo sim...

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