نتایج جستجو برای: reveres wiener indices

تعداد نتایج: 90442  

Journal: :بوم شناسی کشاورزی 0
اشکان عسگری کورس خوشبخت سعید صوفی زاده جعفر کامبوزیا

evaluation diversity of agricultural plants and effectiveness of management factors in non-hunting of gharaviz abstract biodiversity is the basis of agriculture. sustainable agriculture both promotes and is enhanced by biodiversity. during present study, agrobiodiversity and management factors were investigated in three villages of gharaviz area and four villages in surroundings area, in sarpol...

Journal: :journal of physical & theoretical chemistry 2009
esmat mohammadinasab

topological indices are one of the oldest and most widely used descriptors in quantitative structureproperties relationvhips (qspr). amongst the topological indices used a,s descriptors in qspic., the wienerindex is by far the most popular index. as it has been shown that the wiener index has a strong correlationwith the chemical propenies of the compound.in this study, the relationship between...

Journal: :Mathematical and Computer Modelling 2009

Journal: :Discrete Applied Mathematics 2009

Journal: :Journal of chemical information and computer sciences 2000
Ovidiu Ivanciuc

Quantitative structure-property relationship (QSPR) and quantitative structure-activity relationship (QSAR) studies use statistical models to compute physical, chemical, or biological properties of a chemical substance from its molecular structure, encoded in a numerical form with the aid of various descriptors. Structural indices derived from molecular graph matrices represent an important gro...

2007
Weigen Yan Bo-Yin Yang Yeong-Nan Yeh

The sum of distances between all vertices pairs in a connected graph is known as the Wiener Index. It is the earliest of the indices that correlates well with many physicochemical properties of organic compounds and as such has been well-studied over the last quarter of a century. A q-analogue of this index, termed the Wiener Polynomial by Hosoya but also known today as the Hosoya Polynomial, e...

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