نتایج جستجو برای: including geostatistical methods ok
تعداد نتایج: 2609874 فیلتر نتایج به سال:
In this study we evaluated the diffusion of nitrous oxide in a few operating rooms, using spatial data modelling techniques, in order to assess hospital staff exposure and to promote risk management. Indoor air sampling was carried out, during routine operating activity, by means of transportable infrared spectrometer, with geostatistical techniques. We detected high average concentrations of n...
In this paper, we aim to achieve two specific objectives. The first one is to examine the applicability of wavelet neural network (WNN) technique in ore grade estimation, which is based on integration between wavelet theory and Artificial Neural Network (ANN). Different wavelets are applied as activation functions to estimate Cu grade of borehole data in the hypogene zone of porphyry ore deposi...
BACKGROUND/AIMS Phosphate homeostasis is controlled by the renal reabsorption of Pi by the type IIa sodium phosphate cotransporter, Npt2a, which is localized in the proximal tubule brush border membrane. Regulation of Npt2a expression is a key control point to maintain phosphate homeostasis with most studies focused on regulating protein levels in the brush border membrane. Molecular mechanisms...
INTRODUCTION A geostatistical approach to characterize MS-lesion patterns based on their geometrical properties is presented. METHODS A dataset of 259 binary MS-lesion masks in MNI space was subjected to directional variography. A model function was fit to express the observed spatial variability in x, y, z directions by the geostatistical parameters Range and Sill. RESULTS Parameters Range...
The paper presents some contemporary approaches to the spatial environmental data analysis, processing and presentation. The main topics are concentrated on the decision–oriented problems of environmental and pollution spatial data mining and modelling: valorisation and representativity of data with the help of exploratory data analysis, topological, statistical and fractal measures of monitori...
BACKGROUND The streptococcal agent OK-432 has been used for immunotherapy of head and neck cancer, among other malignancies, but its mechanism of action is unknown. Because the Toll-like receptor 4 (TLR4)/MD-2 complex is important in enabling the mammalian immune system to recognize bacterial components, we investigated whether expression of the TLR4 and MD-2 genes is associated with OK-432-ind...
Let K be an algebraic number field and OK the ring of integers of K. Let f : X → Spec(OK) be a stable arithmetic surface over OK of genus g ≥ 2. In this short note, we will prove that if f has a reducible geometric fiber, then (ωAr X/OK · ωAr X/OK ) ≥ log 2/6(g − 1). Let K be a number field and OK the ring of integers of K. Let f : X → Spec(OK) be a stable arithmetic surface of genus g ≥ 2. One...
Norah E. Dunbar, Department of Communication, Center for Applied Social Research, University of Oklahoma, Norman, OK, USA Scott N. Wilson, University of Oklahoma, Norman, OK, USA Bradley J. Adame, University of Oklahoma, Norman, OK, USA Javier Elizondo, University of Oklahoma, Norman, OK, USA Matthew L. Jensen, University of Oklahoma, Norman, OK, USA Claude H. Miller, University of Oklahoma, No...
The presented paper describes the geostatistical analysis of PSInSAR data. This analysis was preceded by short description of PSInSAR technique. The geostatistical computations showed in this article were performed with the R open-source software containing the gstat package. The analysis contains variograms computing (directional variograms) and ordinary kriging interpolation. The computationa...
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