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Search Results: 1 - 10 of 2452 matches for " degree "
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An Analytical Approach for Degree Correlations in Complex Network  [PDF]
Kosuke Takagi
World Journal of Mechanics (WJM) , 2012, DOI: 10.4236/wjm.2012.23020
Abstract: We investigate correlations between neighbor degrees in the scale-free network. According to the empirical studies, it is known that the degree correlations exhibit nontrivial statistical behaviors. With using an analytical approach, we show that the scale-freeness and one of statistical laws for degree correlations can be reproduced consistently in a unified framework. Our result would have its importance in understanding the mechanisms which generate the complex network.
Implementation of LT Code with a Novel Degree Distribution  [PDF]
Qingxiao Du, Xiaoqin Song, Ying Liu, Liping Zhao
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.24B046
Abstract: It is known that Luby Transform code (LT code) is the first code fully realizing the digital fountain concept and provides an efficient scheme to transfer information over different channels. The key to make LT code work well is the degree distribution used in the encoding procedure. It determines the degree of each encoding symbol. On the basis of robust solition distribution and optimized degree distribution, a novel degree distribution which has only one parameter is proposed in this paper. Through computer simulation, the performance of LT code with the novel degree distribution is better than the robust solition distribution and sparse degree distribution. The conclusion of the research is practically valuable in improving the efficience of data distribution application.
Modified Generalized Degree Distance of Some Graph Operations  [PDF]
Shengmei Lv
Advances in Pure Mathematics (APM) , 2018, DOI: 10.4236/apm.2018.86032
Abstract: The modified generality degree distance, is defined as: \"\",?which is a modification of the generality degree distance. In this paper, we give some computing formulas of the modified generality degree distance of some graph operations, such as, composition, join, etc.
Bactericidal Hydrogel Based on Sodium-Carboxymethylcellulose Contained Silver Nanoparticles: Obtaining and Properties  [PDF]
Yunusov Khaydar Ergashovich, arymsakov Abdushkur Abdukhalilovich, Rashidova Sayora Sharaphovna
Open Journal of Polymer Chemistry (OJPChem) , 2018, DOI: 10.4236/ojpchem.2018.84006
Abstract: Stable silver nanoparticles in a sodium-carboxymethylcellulose hydrogel with a substitution degree of 0.65 - 0.85 and polymerization degree of 200 - 600 have been synthesized. Physical, chemical properties and antimicrobial activity of sodium-carboxymethylcellulose hydrogels contained silver nanoparticles were studied. The shape, number and size of silver nanoparticles (SNP) incorporated into the structure of hydrogels of sodium-carboxymethylcellulose were studied by using UV-VIS spectroscopy, transmission electron and atomic force microscopy. It was found that the silver nitrate concentration increase in sodium-carboxymethylcellulose solutions, as well as photoirradiation of the hydrogel lead to the changes of the silver nanoparticles size and shape. The studies have shown that the spherical silver nanoparticles of 5 - 35 nm in the structure of sodium-carboxymethylcellulose hydrogel possess high bactericidal activity. Our results have shown that changing of size and shape of silver nanoparticles contributes to appearance of their biological activity.
Online Detection of Network Traffic Anomalies Using Degree Distributions  [PDF]
Wuzuo WANG, Weidong WU
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.32025
Abstract: Diagnosing traffic anomalies rapidly and accurately is critical to the efficient operation of large computer networks. However, it is still a challenge for network administrators. One problem is that the amount of traffic data does not allow real-time analysis of details. Another problem is that some generic detection metrics possess lower capabilities on diagnosing anomalies. To overcome these problems, we propose a system model with an explicit algorithm to perform on-line traffic analysis. In this scheme, we first make use of degree distributions to effectively profile traffic features, and then use the entropy to determine and report changes of degree distributions, which changes of entropy values can accurately differentiate a massive network event, normal or anomalous by adaptive threshold. Evaluations of this scheme demonstrate that it is feasible and efficient for on-line anomaly detection in practice via simulations, using traffic trace collected at high-speed link.
Cycles, the Degree Distance, and the Wiener Index  [PDF]
Daniel Gray, Hua Wang
Open Journal of Discrete Mathematics (OJDM) , 2012, DOI: 10.4236/ojdm.2012.24031
Abstract: The degree distance of a graph G is , where and are the degrees of vertices , and is the distance between them. The Wiener index is defined as . An elegant result (Gutman; Klein, Mihali?,, Plav?i? and Trinajsti?) is known regarding their correlation, that for a tree T with n vertices. In this note, we extend this study for more general graphs that have frequent appearances in the study of these indices. In particular, we develop a formula regarding their correlation, with an error term that is presented with explicit formula as well as sharp bounds for unicyclic graphs and cacti with given parameters.
A Model of Translation of Politeness Based on Relevance Theory  [PDF]
Fang Wang
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.29045
Abstract: Sperber and Wilson developed the Relevance Theory of communication. It did not take long before it was applied to translation. This dissertation attempts to illustrate the model of the translation of politeness. Translation is a cross-linguistic sociocultural practice, in which a text in one language is replaced by a text with equivalent relevance degree in another. The original contains three variables, which, once summed, give the weightiness of the face-threatening act and the choice of stimulus is decided.
On Eccentric Digraphs of Graphs  [PDF]
Medha Itagi Huilgol, Syed Asif Ulla S., Sunilchandra A. R.
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.26093
Abstract: The eccentricity e(u) of a vertex u is the maximum distance of u to any other vertex of G. A vertex v is an eccentric vertex of vertex u if the distance from u to v is equal to e(u). The eccentric digraph ED(G) of a graph (digraph) G is the digraph that has the same vertex as G and an arc from u to v exists in ED(G) if and only if v is an eccentric vertex of u in G. In this paper, we have considered an open problem. Partly we have characterized graphs with specified maximum degree such that ED(G) = G.
Estimation of the Degree of Saturation of Shallow Soils from Satellite Observations to Model Soil Slips Occurred in Emilia Romagna Region of Northern Italy  [PDF]
Valentino Roberto, Montrasio Lorella, Chiara Quintavalla
International Journal of Geosciences (IJG) , 2010, DOI: 10.4236/ijg.2010.12008
Abstract: For the development of alert systems for soil slip occurrence, it is important to evaluate the degree of saturation of shallow soils (Sr) over wide areas. Taking into account the possibility to estimate spatial and temporal variation of soil moisture using remote sensing techniques, a possible correlation between Sr and the daily output of a sequential data assimilation system called ACHAB (Assimilation Code for HeAt and moisture Balance) has been studied. ACHAB is based on integrated use of remotely sensed land surface temperature (LST) and common data on meteorological forcing such as air temperature, wind-speed and incident solar radiation. The aim of this study is to understand if it is possible to use ACHAB output (a daily value of evaporative fraction for the whole Italian territory) to define the parameter Sr that could be introduced in a simplified model for the description of soil slip triggering mechanisms on territorial scale.
Influence of Twisting Degree and Number of Cords on the Structure of Silk  [PDF]
Dilfuza Khudayberdieva, Nodira Amirova, Mavjuda Abdukarimova, S. Khazova, Nargiz Mirzahmedova
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.212230
Abstract: Properties of the fibrous material which has oriented supermolecular formations are depended on such structural factors as morphology, inter position of structure elements, and their interaction. Influence of processing on changing original structure of fibrous material during mechanical processing that causes deformation at loading is determined by peculiarities of its structure. Reversible and irreversible changes of structural elements in fibrous material causes changing of volume and sorption properties and will essentially influence on its chemical finishing processes. Influence of twisting degree and number of silk cords on structure and physical mechanical properties. Changing of supermolecular structure of thread in the process of its forming by X-ray graphic, sorption and focused beam electronic microscopic methods was researched.
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