نتایج جستجو برای: diversity and topology

تعداد نتایج: 16859656  

Journal: :محیط شناسی 0
محمد پناهنده استادیار گروه پژوهشی محیط زیست، پژوهشکدۀ محیط زیست، جهاد دانشگاهی حبیب فتحی دخت کارشناس ارشد علوم محیط زیست و کارشناس ارشد پژوهشی پژوهشکدۀ محیط زیست، جهاد دانشگاهی

introduction:landscape structure means the pattern of a landscape, which is determined by its type of use, but also by its structure, i.e. the size, shape, arrangement and distribution of individual landscape elements. for the delineation of these landscape elements, or so-called patches, often land use or land cover units are used. in this context, “‘land cover’ refers to the physical surface ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده علوم 1389

چکیده ندارد.

Journal: :Pattern Recognition and Image Analysis 2021

Topology is a classical branch of mathematics, born essentially from Euler’s studies in the XVII century, which deals with abstract notion shape and geometry. Last decades were characterized by renewed interest topology topology-based tools, due to birth computational topological data analysis (TDA). A large novel family methods algorithms computing features descriptors (e.g., persistent homolo...

A Boussaha, R Makhloufi S Madani

This work consists in a numerically evaluation of elastic fields distribution, caused by intrinsic dislocation networks placed at a nanometric trilayers interfaces, in order to estimate their influence on the surface topology during heterostructure operation. The organization of nanostructures is ensured by the knowledge of different elastic fields caused by buried dislocation networks and calc...

ژورنال: پژوهش های ریاضی 2022

The purpose of this study is to show how topological surfaces are painted in such a way that the colors are borderless but spaced with the lowest color number. That a surface can be painted with at least as many colors as the condition of defining a type of mapping with the condition that it has no fixed point. This mapping is called color mapping and is examined and analyzed in differe...

Journal: :Physical Review E 2021

Mutation and drift play opposite roles in genetics. While mutation creates diversity, can cause gene variants to disappear, especially when they are rare. In the absence of natural selection migration, balance between a well-mixed population defines its diversity. The Moran model captures effects these two evolutionary forces has counterpart social dynamics, known as Voter with external opinion...

Journal: :bulletin of the iranian mathematical society 2015
a. a. ‎estaji a. ‎karimi feizabadi m. abedi

in this paper a particular case of z-ideals, called strongly z-ideal, is defined by introducing zero sets in pointfree topology. we study strongly z-ideals, their relation with z-ideals and the role of spatiality in this relation. for strongly z-ideals, we analyze prime ideals using the concept of zero sets. moreover, it is proven that the intersection of all zero sets of a prime ideal of c(l),...

A. Parsa, L. Shahryari , S.M. Tavakkoli,

In this article, the ant colony method is utilized for topology optimization of space structures. Strain energy of the structure is minimized while the material volume is limited to a certain amount. In other words, the stiffest possible structure is sought when certain given materials are used. In addition, a noise cleaning technique is addressed to prevent undesirable members in optimum topol...

Journal: :journal of linear and topological algebra (jlta) 0
r messaoud university of gafsa tunisia e bouassida topoolgy b ghanmi topology a missaoui topology

a. csaszar introduced and extensively studied the notionof generalized open sets. following csazar, we introduce a new notionsuperconnected. the main purpose of this paper is to study generalizedsuperconnected spaces. various characterizations of generalized super-connected spaces and preservation theorems are discussed.

Journal: :Cell 2009
Suchit Jhunjhunwala Menno C. van Zelm Mandy M. Peak Cornelis Murre

The adaptive immune system generates a specific response to a vast spectrum of antigens. This remarkable property is achieved by lymphocytes that each express single and unique antigen receptors. During lymphocyte development, antigen receptor coding elements are assembled from widely dispersed gene segments. The assembly of antigen receptors is controlled at multiple levels, including epigenet...

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