نتایج جستجو برای: regression equations

تعداد نتایج: 548702  

2012
Franz J. Király Paul von Bünau Jan Saputra Müller Duncan A. J. Blythe Frank C. Meinecke Klaus-Robert Müller

We propose a method called ideal regression for approximating an arbitrary system of polynomial equations by a system of a particular type. Using techniques from approximate computational algebraic geometry, we show how we can solve ideal regression directly without resorting to numerical optimization. Ideal regression is useful whenever the solution to a learning problem can be described by a ...

2004
Ljupčo Todorovski Sašo Džeroski Peter Ljubič

Both equation discovery and regression methods aim at inducing models of numerical data. While the equation discovery methods are usually evaluated in terms of comprehensibility of the induced model, the emphasis of the regression methods evaluation is on their predictive accuracy. In this paper, we present Ciper, an efficient method for discovery of polynomial equations and empirically evaluat...

Journal: :علوم دامی ایران 0
جمشید نورقدیمی دانشجوی کارشناسی ارشد، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج حسین مروج دانشیار، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج فاطمه غازیانی استادیار، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج رسول اکبری کارشناس ارشد، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

this study was conducted to determine regression equations for the prediction metabolizable energy value corrected for zero nitrogen retention (amen) in 12 wheat cultivars (mahdavi, chamran, sabalan, sepahan, sivand, alamoot, sholeh, neishaboor, pishtaz, bahar, shiraz and shahpasand) cultured in alborz province of iran. chromic oxide marker bioassay was used to determine wheat cultivars nitroge...

ژورنال: علوم آب و خاک 2006
حمیدرضا سالمی, , علیرضا سپاسخواه, ,

Estimation of seepage is essential prior to lining of earth canals. In Iran such investigation has been achieved in some irrigation networks using empirical relationships derived in other countries. Estimation of water loss in canal is required in design, operation and management of water distribution systems. Water seepage may be determind by using empirical equations proposed by F.A.O. These ...

حمیدرضا سالمی, , علیرضا سپاسخواه, ,

Estimation of seepage is essential prior to lining of earth canals. In Iran such investigation has been achieved in some irrigation networks using empirical relationships derived in other countries. Estimation of water loss in canal is required in design, operation and management of water distribution systems. Water seepage may be determind by using empirical equations proposed by F.A.O. These ...

  Today, modeling and determination of allometric equations of forest trees, especially Junipers trees, are very important for determination of biological status and carbon storage capacity of forest species. The aim of this study was to determine the most suitable allometric equations for estimating the biomass of leaf, sub branch, main branch, trunk, and biomass of total Juniperus excelsa tr...

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