نتایج جستجو برای: local structure

تعداد نتایج: 2019046  

2009
T. A. Tyson Z. Chen Q. Li J. J. Tu

We have combined temperature-dependent local structural measurements with first-principles densityfunctional calculations to develop a three-dimensional local structure model of the misfit system Ca2CoO3 CoO2 1.61 referred to as Ca3Co4O9 which has a rocksalt structure stacked incommensurately on a hexagonal CoO2 lattice. The local structural measurements reveal a low coordination of Co 2 -O bon...

2004
Christian Borgelt Rudolf Kruse

A recent topic in probabilistic network learning is to exploit local network structure, i.e. to capture regularities in the conditional probability distributions, and to learn networks with local structure from data. In this paper we apply this idea to possibilistic networks, i.e. we try to capture regularities in conditional possibility distributions, and present a modification of the learning...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان 1390

امروزه از مهمترین بحث هایی که بخش زیادی از زمان محققین را به خود اختصاص داده است، مباحث مربوط به آب به عنوان حیاتی ترین ماده بقای حیات انسان. تغییر در آب در دسترس می تواند واکنش جدی در پایداری آب زیست محیطی مناطق خشک و نیمه خشک ایجاد کند. لذا یکی از پر کاربردترین مباحث مربوط به هیدرولوژی بررسی هیدروگراف جریان می باشد که امکان مطالعه حجم سیلاب و میزان ذخیره حوزه پس از قطع بارندگی و نیز سهم آب زی...

1989
Hans Knutsson

The fundamental problem of finding a suitable representation of the orientation of 3D surfaces is considered. A representation is regarded suitable if it meets three basic requirements: Uniqueness, Uniformity and Polar separability. A suitable tensor representation is given. At the heart of the problem lies the fact that orientation can only be defined mod 180◦ , i.e the fact that a 180◦ rotati...

2011
Swastik Kopparty

Proof. This theorem is a corollary of the (much more general) Kruskal-Katona theorem. The Kruskal-Katona theorem has a very hands-on proof, based on iteratively modifying the graph. We will see a linear-algebraic proof. Let A be the n×n adjacency matrix of G (Auv = 1 if vertex u is adjacent to vertex v, and Auv = 0 otherwise). Note that A is symmetric. It turns out that e and t are both fundame...

Journal: :Physical review letters 2008
Ginestra Bianconi Natali Gulbahce Adilson E Motter

Previous work on undirected small-world networks established the paradigm that locally structured networks tend to have a high density of short loops. On the other hand, many realistic networks are directed. Here we investigate the local organization of directed networks and find, surprisingly, that real networks often have very few short loops as compared to random models. We develop a theory ...

2005
Maxim Krikun

This paper is an adaptation of a method used in [10] to the model of random quadrangulations. We prove local weak convergence of uniform measures on quadrangulations and show that the local growth of quadrangulation is governed by certain critical time-reversed branching process and the rescaled profile converges to the reversed continuous-state branching process. As an intermediate result we d...

2003
Fabien Mathieu Laurent Viennot

The web graph has been widely adopted as the core describing the web structure [4]. However, little attention has been paid to the relationship between the web graph and the location of the pages. It has already been noticed that links are often local (i.e. from a page to another page of the same server) and this can be used for efficient encoding of the web graph [9,7]. Locality in the web can...

Journal: :iranian red crescent medical journal 0
mehdi zanganeh baygi international campus, iran university of medical sciences, tehran, ir iran hesam seyedin international campus, iran university of medical sciences, tehran, ir iran; international campus, iran university of medical sciences, tehran, ir iran. tel: +98-2188772088 masoud salehi department of biostatistics, faculty of public health, iran university of medical sciences, tehran, ir iran mehdi jafari sirizi health management and economics research centre, school of health management and information sciences, iran university of medical sciences, tehran, ir iran

results local level of primary health care system in iran had mechanical structure, but in contextual dimensions the results showed different types. there was a significant relationship between structural and contextual dimensions (r = 0.642, p value < 0.001). goals and culture dimensions had strongest effects on structural dimensions. background in recent years, family physician plan was estab...

Irina Kramarenko Khrystyna Patytska Nazariy Popadynets, Olena Panukhnyk

The budgetary capacity with the tax component as its key aspect is the basis for forming local budgets of a territorial community. The paper outlines the methods for diagnostics of the budgetary capacity of territorial communities by revenues aimed at providing a comprehensive quantitative and qualitative assessment of the status, strengths, and weaknesses of the economy of an administrative-te...

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