نتایج جستجو برای: fractal group

تعداد نتایج: 1006942  

2017
Benjamin T. Elder Massimiliano Procura Jesse Thaler Wouter J. Waalewijn

We introduce a broad class of fractal jet observables that recursively probe the collective properties of hadrons produced in jet fragmentation. To describe these collinearunsafe observables, we generalize the formalism of fragmentation functions, which are important objects in QCD for calculating cross sections involving identified final-state hadrons. Fragmentation functions are fundamentally...

1997
P. Bock C. J. Kocinski H. Schmidt R. Klinnert R. Kober R. Rovner

Based on collective learning systems theory, a Transputer-based parallel processing imageprocessing engine, known as ALIAS (Adaptive Learning Image Analysis System) has been applied to a difficult image processing problem: the detection of anomalies in otherwise normal images. This system was designed and developed at the Research Institute for Applied Knowledge Processing (FAW) in Ulm, Germany...

Journal: :Methods of information in medicine 2004
K Ohashi G Bleijenberg S van der Werf J Prins L A N Amaral B H Natelson Y Yamamoto

OBJECTIVES Our objectives were to study the temporal correlation of physical activity time series in patients with chronic fatigue syndrome (CFS) during normal daily life and to examine if it could identify the altered physical activity in these patients. METHODS Fractal scaling exponents of diurnal and nocturnal physical activity time series in 10 CFS patients and 6 healthy control subjects ...

2017
Yanguang Chen

Fractal geometry provides a powerful tool for scale-free spatial analysis of cities, but the fractal dimension calculation results always depend on methods and scopes of study area. This phenomenon has been puzzling many researchers. This paper is devoted to discussing the problem of uncertainty of fractal dimension estimation and the potential solutions to it. Using regular fractals as archety...

2010
Nirupama Bhattacharya

The project aims to explore two fractal models (by Lowen and Liebovitch) of ion channel kinetics, and how this affects spike train patterns. The project also intends to extend the Liebovitch model and explore how fractal dimension affects potassium ion channel conductance profiles, and the behavior and rate of action potentials. 1 I n t r o d u c t i o n Fractal patterns have been used to model...

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 1999
Jin Li C.-C. Jay Kuo

A hybrid wavelet-fractal coder (WFC) for image compression is proposed. The WFC uses the fractal contractive mapping to predict the wavelet coefficients of the higher resolution from those of the lower resolution and then encode the prediction residue with a bitplane wavelet coder. The fractal prediction is adaptively applied only to regions where the rate saving offered by fractal prediction j...

Journal: :JCP 2012
HuaiQiang Zhang JingBing Li

Fractal property of the knowledge of supply chain is confirmed, and the concept of fractal integration is presented. And the knowledge of supply chain is fractal integrated by building modularization fractal knowledge integration network independent of the organization structure. The process of fractal integration of the knowledge is divided into five stages: acquisition, transition, applicatio...

1996
Geoffrey M. Davis

Fractal compression schemes do not t into the standard transform coder paradigm and have proven diicult to analyze. The theory of iterated function systems motivates a broad class of fractal schemes but does not give much guidance for their implementation. We introduce a wavelet-based framework for analyzing fractal block coders which simpliies these schemes considerably. We show that fractal b...

2017
H Reza Namazi

Fractal theory has been used widely for studying the scaling properties of different biological and ecological time series [1-3]. A phenomenon showinga repeating pattern at every scale is called fractal [4]. Fractals can be regular or complex [5]. In fact, fractal objects can be characterized using a scaling exponent that is called fractal dimension. Regular and complex fractals have integer an...

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