Results 31 to 40 of about 3,205,265 (299)

Significance of breeding value indicators for prediction of milk yield [PDF]

open access: yesТехнологія виробництва і переробки продуктів тваринництва, 2022
A comparative assessment of the significance of various indicators of the breeding value of breeding bulls for predicting milk yield in the highly productive herd of the farm economy "Alfa" was carried out.
Shablia V.   +4 more
doaj   +1 more source

Robust variable selection in partially varying coefficient single-index model [PDF]

open access: yes, 2015
By combining basis function approximations and smoothly clipped absolute deviation (SCAD) penalty, this paper proposes a robust variable selection procedure for a partially varying coefficient single-index model based on modal regression.
Deng, C, Lv, Z, Yu, K, Zhu, H
core   +1 more source

Does the phenotypic selection affect the genetic structure and diversity? A study case on Walnut in eastern central Italy (the region of Marche)

open access: yesAnnals of Silvicultural Research, 2009
The Persian walnut (Juglans regia L.) is widely planted in western Europe, either for fruit either for high quality timber production. This tree is generally considered non authoctonous, probably introduced from East some 7000 years ago and spread by ...
Fulvio Ducci   +3 more
doaj   +1 more source

Variable Selection Bias in Classification Trees Based on Imprecise Probabilities [PDF]

open access: yes, 2005
Classification trees based on imprecise probabilities provide an advancement of classical classification trees. The Gini Index is the default splitting criterion in classical classification trees, while in classification trees based on imprecise ...
Strobl, Carolin
core   +3 more sources

Optical selection rules of graphene nanoribbons

open access: yes, 2011
Optical selection rules for one-dimensional graphene nanoribbons are analytically studied and clarified based on the tight-binding model. A theoretical explanation, through analyzing the velocity matrix elements and the features of wavefunctions, can ...
Chang, C. P.   +3 more
core   +1 more source

A new index of financial conditions [PDF]

open access: yes, 2013
We use factor augmented vector autoregressive models with time-varying coefficients and stochastic volatility to construct a financial conditions index that can accurately track expectations about growth in key US macroeconomic variables.
Koop, Gary, Korobilis, Dimitris
core   +5 more sources

Strategy of multiple selection indices for discrimination of potential genotypes and associated traits for yield improvement in pearl millet [Pennisetum glaucum (L.) R.Br.]

open access: yesElectronic Journal of Plant Breeding, 2021
A study was conducted with 31 genotypes of pearl millet to identify the potential through correlation, path analysis and discriminant function analysis for yield and yield attributing traits at the Department of Millets, Tamil Nadu Agricultural ...
Venkataramana S. Kalagare1*, N. Meenakshi ganesan1, K. Iyanar2, T. Chitdeshwari3 and C. N. Chandrasekhar4
doaj   +1 more source

Economic weights for restriction of selection index as optimal strategy for combining multiple traits

open access: yesJournal of Dairy Science, 2022
: Presently, selection indices combine EBV belonging to many phenotypes accounting for production and functional traits. In this situation, ensuring positive genetic trends becomes difficult, especially when an antagonistic genetic relationship between ...
E. Mancin   +3 more
doaj   +1 more source

Unbiased split selection for classification trees based on the Gini Index [PDF]

open access: yes, 2005
The Gini gain is one of the most common variable selection criteria in machine learning. We derive the exact distribution of the maximally selected Gini gain in the context of binary classification using continuous predictors by means of a combinatorial ...
Augustin, Thomas   +2 more
core   +5 more sources

ASSESSMENT OF NEW EARLY-MATURING MAIZE HYBRIDS SELECTED BY THE VNIIOZ – BRANCH OF THE FEDERAL STATE BUDGETARY INSTITUTION “A. N. KOSTYAKOV FEDERAL RESEARCH CENTER VNIIGIM” UNDER THE CONDITIONS OF THE NORTH-WEST OF VOLGOGRAD REGION

open access: yesМелиорация и гидротехника
Purpose: to study the productive potential of new early-maturing maize hybrids of FAO 150–160, selected by All-Russian Research Institute of Irrigated Agriculture, under the boghara conditions, in the north-west of Volgograd region.
Elena V. Chugunova   +2 more
doaj   +1 more source

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