نتایج جستجو برای: s a multi fractal

تعداد نتایج: 13659343  

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
m. r. amiryousefi m. mohebbi f. khodaiyan

analysis of food surfaces is of interest because many processes depend on their complexity. food surfaces show several textural characteristics related to their nature, composition and processing. food surface images and their microscopic details need to be translated into numerical data before engineering analysis. fractal geometry is a novel concept to describe the complexity of natural shape...

One of the related problems of OCR systems is discrimination of fonts in machine printed document images. This task improves performance of general OCR systems. Proposed methods in this paper are based on various fractal dimensions for font discrimination. First, some predefined fractal dimensions were combined with directional methods to enhance font differentiation. Then, a novel fractal dime...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده علوم پایه 1392

فرض می کنیم g یگ گروه نابدیهی، s=s^(-1)={s^(-1) |s?s} و 1?s?g. گراف کیلی g که آن را به صورت cay(s:g) نمایش می دهیم ، یک گراف با مجموعه رئوس g است که در آن دو رأس a و b مجاور هستند هرگاه ab^(-1)?s. یک گراف صحیح است، اگر مقادیر ویژه مجاورت آن صحیح باشند. فرض کنید g گروهی متناهی و g ? مجموعه تمام سرشت های نمایش های g روی اعداد مختلط باشد. برای هر a?g ، ??g ? و( ?(a)=?_(a?a)?(a، مجموعه a را صحیح م...

A compact printed fractal antipodal bow-tie antenna is designed and implemented to simultaneously cover the operations in the C, X, and Ku-bands. It is demonstrated that by addition of small fractal elements at the sides of hexagonal arms of the bow-tie, a wide operating frequency range of 3.3 to 19.1 GHz can be covered while antenna size is only 30×34×1.2 mm3. In order to match the antenna to ...

2014
Manpreet Kaur Amandeep Singh

In this paper, sierpinski carpet fractal shape antenna for RFID applications is proposed. The proposed antenna has been designed with scaling factor of one-fourth with the aim of reducing antenna size and improved performance parameters. Fractal shaped has been developed to improve the characteristics and to miniaturize the size of proposed antenna. Usually, an antenna works at one or two frequ...

ژورنال: علوم آب و خاک 2015
بنی‏ طالبی, گلنوش, بیگی هرچگانی, حبیب,

Texture fractal dimension is a physical index to describe soil particle size distribution having a variety of applications. Fractal dimension may be calculated from three relations of mass-time, mass-diameter and modified mass-diameter (Kravchenko-Zhang) with two linear and nonlinear options for fittings. The aim of the present study was to compare methods and select an appropriate one and fitt...

Hamid Pashaei Adl, Samad Roshan Entezar,

In this paper, the optical properties of one dimensional fractal structures are investigated. We consider six typical fractal photonic structures: the symmetric dual cantor-like fractal structure, the asymmetric dual cantor-like fractal structure, the single cantor-like fractal structure, the symmetric dual golden-section fractal structure, the asymmetric dual golden-section fractal structure a...

Journal: :iranian journal of pathology 2011
farahnaz noroozinia gholamreza behjati shahram shahabi hamidreza farrokh islamlo zuhair mohammad hassan

background & objectives: cancer is a serious problem for human being and is becoming a serious problem day-by-day .a prerequisite for any therapeutic modality is early diagnosis. automated cancer diagnosis by automatic image feature extraction procedures can be used as a feature extraction in the field of fractal dimension. the aim of this survey was to introduce a quantitative and objectiv...

2012
Kun Hu Johanna H. Meijer Steven A. Shea Henk Tjebbe vanderLeest Benjamin Pittman-Polletta Thijs Houben Floor van Oosterhout Tom Deboer Frank A. J. L. Scheer

The mammalian central circadian pacemaker (the suprachiasmatic nucleus, SCN) contains thousands of neurons that are coupled through a complex network of interactions. In addition to the established role of the SCN in generating rhythms of ~24 hours in many physiological functions, the SCN was recently shown to be necessary for normal self-similar/fractal organization of motor activity and heart...

2006
Olivier Dalle

This paper describes work in progress to initiate the collaborative development of a new software platform for discrete-event simulation studies, the Open Simulation Architecture (OSA). OSA is primarily intended to be a federating platform for the simulation community: it is designed to favour the integration of new or existing contributions at every level of its architecture. The platform core...

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