نتایج جستجو برای: c a fractal
تعداد نتایج: 13645597 فیلتر نتایج به سال:
we introduce a model for prediction the behavior of electrodes which modified withcarbon nanotubes in a polymer medium. these kinds of polymer composites aredeveloped in recent years, and experimental data for its percolation threshold isavailable. we construct a model based on percolation theory and fractal dimensionsand using experimental percolation threshold for calculating the moments of c...
چکیده مخروط هایی که از c*- زیر جبرها به دست می آیند و مفهوم کاملاً مثبت بودن به وسیله ی: سیما رحیمی چر مهینی اگر a یک c^*- جبر و b یک ?-c?^* زیر جبر از a باشد بصورتی که b?a، آن گاه b، a را نرم دار می کند اگر برای هر x?m_n (a)، ?x?=sup{?rxc?:r^*,c?col_n (b),?r?,?c??1} در این پایان نامه مطالب مربوط به مخروط ها معرفی می شوند. مخروط ها بصورت زیر بیان می شوند: .{x?m_n (a)_sa:c^* x...
the soil water retention curve (swrc) is a basic characteristic of the determination of soil hydraulic properties, including unsaturated hydraulic conductivity. measurement of this curve is essential to research, thus scientists have focused on indirect methods such as pedotransfer functions and empirical relationships to estimate swrc easily. since there is a close relationship between swrc an...
The fractal interpolation functions with appropriate iterated function systems provide a method to perturb and approximate continuous on compact interval I. This produces class of $$f^{\varvec{\alpha }}\in {\mathcal {C}}(I)$$ , where $$\varvec{\alpha }$$ is vector functional components. presence scaling in these helps get wide variety mappings for approximation problems. current article explore...
The aim of this study is to characterize and find the location of geological boundaries in different wells across a reservoir. Automatic detection of the geological boundaries can facilitate the matching of the stratigraphic layers in a reservoir and finally can lead to a correct reservoir rock characterization. Nowadays, the well-to-well correlation with the aim of finding the geological l...
Barnsley, M. 1983 Fractals Everywhere, Academic Press. Brill, R. 1995 Embellished Lissajous Figures, The Pattern Book(ed. Pickover, C. ). Davis, C. and Knuth, D. E. 1970 Number representations and dragon curves,Journal of Recreational Mathematics 3(1970) 66-81 and 133-149. . Draves, S. 1992 The Fractal Flame Algorithm, flame3. com/flame-draves. pdf. Hofstadter, D. R. 1982 Strange attractors: Ma...
Introduction: Graph theoretical analysis of functional Magnetic Resonance Imaging (fMRI) data has provided new measures of mapping human brain in vivo. Of all methods to measure the functional connectivity between regions, Linear Correlation (LC) calculation of activity time series of the brain regions as a linear measure is considered the most ubiquitous one. The strength of the dependence obl...
In the current study, the kinetics of asphaltene particle flocculation is investigated under a shear flow through numerical simulation. The discrete element method (DEM) is coupled with computational fluid dynamics (CFD) to model the agglomeration and fragmentation processes. In addition, a coalescence model is proposed to consider the attachment of colliding particles. The changes in mean asph...
In this paper we describe a new multiscale model for char acterizing positive valued and long range dependent data The model uses the Haar wavelet transform and puts a con straint on the wavelet coe cients to guarantee positivity which results in a swift O N algorithm to synthesize N point data sets We elucidate our model s ability to capture the covariance structure of real data study its mult...
We describe Hi-C, a method that probes the three-dimensional architecture of whole genomes by coupling proximity-based ligation with massively parallel sequencing. We constructed spatial proximity maps of the human genome with Hi-C at a resolution of 1 megabase. These maps confirm the presence of chromosome territories and the spatial proximity of small, gene-rich chromosomes. We identified an ...
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