نتایج جستجو برای: power spectrum area fractal method

تعداد نتایج: 2694931  

2015
Evgeny Spodarev Peter Straka Steffen Winter

Most of the known methods for estimating the fractal dimension of fractal sets are based on the evaluation of a single geometric characteristic, e.g. the volume of its parallel sets. We propose a method involving the evaluation of several geometric characteristics, namely all the intrinsic volumes (i.e. volume, surface area, Euler characteristic etc.) of the parallel sets of a fractal. Motivate...

Journal: :پژوهش های جغرافیای طبیعی 0
سیاوش شایان استادیار، گروه جغرافیای طبیعی، دانشکدة علوم انسانی، دانشگاه تربیت مدرس مهران مقصودی دانشیار، گروه جغرافیای طبیعی، دانشکدة جغرافیای دانشگاه تهران موسی گل علیزاده استادیار، گروه آمار، دانشکدة آمار و ریاضیات، دانشگاه تربیت مدرس محمد شریفی کیا دانشیار، گروه سنجش از دور، دانشکدة علوم انسانی، دانشگاه تربیت مدرس سیده فاطمه نوربخش دانشجوی دکتری جغرافیای طبیعی، دانشکدة علوم انسانی، دانشگاه تربیت مدرس

spatial analysis of aeolian landforms by fractal theory (case study: ardestan rig) abstract natural sciences face to a great revolution, nowadays. now, scientists think the world as a collection of complex systems which prediction of consequences of this complex systems is so difficult. in this situation the systems have rotational act so irregularly lead to regular and regularly lead to irregu...

Journal: :The Journal of chemical physics 2009
Luning Zhang Seema Singh Chuanshan Tian Y Ron Shen Yan Wu Mark A Shannon C Jeffery Brinker

Using sum-frequency vibrational spectroscopy, we found that water structure at nanoporous silica/water interfaces depended on the nanoporous film structure. For a periodic, self-assembled nanoporous film with monosized 2 nm pores occupying 20% of the top surface area, the surface vibrational spectrum was dominated by water in contact with silica, bare or covered by silane, at the top surface. I...

The present paper introduces the Bayesian spectral analysis as a powerful and efficient method for spectral analysis of photometric time series. For this purpose, Bayesian spectral analysis has programmed in Matlab software for XZ Dra photometric time series which is non-uniform with large gaps and the power spectrum of this analysis has compared with the power spectrum which obtained from the ...

Journal: :CoRR 2014
Richard Herrmann

The dark silicon problem, which limits the power-growth of future computer generations, is interpreted as a heat energy transport problem when increasing the energy emitting surface area within a given volume. A comparison of two 3D-configuration models, namely a standard slicing and a fractal surface generation within the Menger sponge geometry is presented. It is shown, that for iteration ord...

2016
Deepa Sankar

Modern life style of women has made them more vulnerable to breast cancer and it is considered as the largest cause of mortality among women. This paper presents a novel method to classify mammograms into normal ones, with benign and malignant microcalcifications, and with malignant and benign tumors using fractal features derived from fractal dimension. Here, three fractal dimension estimation...

2013
Oleg I. Sheluhin Artem V. Garmashev

In this chapter, the main principles of the theory of fractals and multifractals are stated. A singularity spectrum is introduced for the random telecommunication traffic, concepts of fractal dimensions and scaling functions, and methods used in their determination by means of Wavelet Transform Modulus Maxima (WTMM) are proposed. Algorithm development methods for estimating multifractal spectru...

Journal: :Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 1993
Canessa

I introduce a simple continuous probability theory based on the Ginzburg-Landau equation that provides for the first time a common analytical basis to relate and describe the main features of two seemingly different phenomena of condensed-matter physics, namely self-organized criticality and multifractality. Numerical support is given by a comparison with reported simulation data. Within the th...

2015
Kishore R. Anekalla Alexander S. Misharin Jacob I. Sznajder Scott G.R. Budinger

This poster is a review of the paper “Fractal-based analysis of optical coherence tomography data to quantify retinal tissue damage” by Somfai et al. (2014). The abstract is as follows: “The sensitivity of Optical Coherence Tomography (OCT) images to identify retinal tissue morphology characterized by early neural loss from normal healthy eyes is tested by calculating structural information and...

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