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Modelling of retinal vasculature based on genetically tuned parametric L-system
, Article Royal Society Open Science ; Volume 5, Issue 5 , 2018 ; 20545703 (ISSN) ; Bozorgmehry Boozarjomehry, R ; Abdekhodaie, M ; Sharif University of Technology
Royal Society Publishing
2018
Abstract
Structures of retinal blood vessels are of great importance in diagnosis and treatment of diseases that affect the eyes. Parametric Lindenmayer system (L-system) is one of the powerful rule-based methods that has a great capability for generating tree-like structures using simple rewriting rules. In this study, a novel framework, which can be used to model the retinal vasculature based on available images, has been proposed. This framework presents a solution to special instance of a general open problem, the L-system inverse problem, in which L-system rules should be obtained based on images representing a particular tree-like structure. In this study, genetic algorithm with a novel...
Anti-synchronization of two different chaotic systems via active control
, Article Wec 05: Fourth World Enformatika Conference, Istanbul, 24 June 2005 through 26 June 2005 ; Volume 6 , 2005 , Pages 62-65 ; 9759845857 (ISBN); 9789759845858 (ISBN) ; Haeri, M ; Sharif University of Technology
2005
Abstract
This paper presents anti-synchronization of chaos between two different chaotic systems using active control method. The proposed technique is applied to achieve chaos antisynchronization for the Lu and Rössler dynamical systems. Numerical simulations are implemented to verify the results. COPYRIGHT © ENFORMATIKA
Developmental model of an automatic production of the human bronchial tree based on L-system
, Article Computer Methods and Programs in Biomedicine ; Volume 132 , 2016 , Pages 1-10 ; 01692607 (ISSN) ; Boozarjomehry, R. B ; Sharif University of Technology
Elsevier Ireland Ltd
2016
Abstract
Background and objective: The human lungs exchange air with the external environment via the conducting airways. The application of an anatomically accurate model of the conducting airways can be helpful for simulating gas exchange and fluid distribution throughout the bronchial tree in the lung. Methods: In the current study, Lindenmayer system (L-system) has been formulated to generate the bronchial tree structure in a human lung. It has been considered that the structure of the bronchial tree is divided into two main segments: 1) The central airways (from the trachea to segmental bronchi) and 2) the dichotomous structure (from segmental bronchi to terminal bronchioles). Two sets of...
Modeling Kidney Vascular Structure Based on Parametric L-system
, M.Sc. Thesis Sharif University of Technology ; Farhadi, Fatolah (Supervisor) ; Bozorgmehry Boozarjomehry, Ramin (Supervisor)
Abstract
Kidney is one of the most complicated organs in terms of functionality and physiology due to its complicated unique vascular structure. Previous investigations have focused on specific characteristics like length and diameter. Most of these methods are based on Image Processing techniques which prevent a comprehensive study in growth and changes of the vascular system. Lindenmyaer system (L-system) is a parallel rewriting system and a type of formal grammar and had been used to create graphs and natural patterns. By absorbing the physiological characteristics of the kidney and integrating them into parametric L-system, a highly dense and accurate vascular system could be generated with few...
Application of GA in optimization of pore network models generated by multi-cellular growth algorithms
, Article Advances in Water Resources ; Volume 32, Issue 10 , 2009 , Pages 1543-1553 ; 03091708 (ISSN) ; Bozorgmehry Boozarjomehry, R ; Pishvaie, M. R ; Sharif University of Technology
2009
Abstract
In pore network modeling, the void space of a rock sample is represented at the microscopic scale by a network of pores connected by throats. Construction of a reasonable representation of the geometry and topology of the pore space will lead to a reliable prediction of the properties of porous media. Recently, the theory of multi-cellular growth (or L-systems) has been used as a flexible tool for generation of pore network models which do not require any special information such as 2D SEM or 3D pore space images. In general, the networks generated by this method are irregular pore network models which are inherently closer to the complicated nature of the porous media rather than regular...