نتایج جستجو برای: α and β angles graf method
تعداد نتایج: 17118767 فیلتر نتایج به سال:
abstract: in this thesis, we focus to class of convex optimization problem whose objective function is given as a linear function and a convex function of a linear transformation of the decision variables and whose feasible region is a polytope. we show that there exists an optimal solution to this class of problems on a face of the constraint polytope of feasible region. based on this, we dev...
the present study explored the effect of strategic human resources management on organizational performance with a mediating role of human capital in faculties of physical education and sport sciences of state universities of tehran. this research was descriptive-causal and the statistical population included all 166 staff and professors of faculties of physical education and sport sciences of ...
فرفیون از گیاهان گلدار متعلق به خانواده شیرسگ یا شیرشیرکان (euphorbiaceae) است. جنس فوق دارای 2008 گونه متعدد است. فرفیون یکی از بزرگترین و پیچیدهترین جنس از گیاهان گل دار بوده و گیاه شناسان چندین تلاش ناموفق برای کوچکتر نمودن جنس ها انجام دادهاند. تعدادی از جنسها برای مصارف دارویی و تعدادی برای مقاصد دیگر بکار برده میشوند. اما جالب است که یک گیاه می تواند هم مفید و هم اثرات سمی داشته با...
A new general concept for α,β-unsaturated acyl ammonium catalysis is reported that uses p-nitrophenoxide release from an α,β-unsaturated p-nitrophenyl ester substrate to facilitate catalyst turnover. This method was used for the enantioselective isothiourea-catalyzed Michael addition of nitroalkanes to α,β-unsaturated p-nitrophenyl esters in generally good yield and with excellent enantioselect...
and Applied Analysis 3 A α , A β are matrices that will be updated adaptively with the following updating laws: ?̇? α (t) = −Q −1 ⋅ z ⋅ ξ T α ⋅ es, ?̇? β (t) = −Q −1 ⋅ z ⋅ ξ T β ⋅ es ⋅ u (t) (12) and finally the control law is described as follows: u (t) = 1 β (t) + β (x) (− [α (t) + ?̂? (x)] + v (t)) . (13) 2.2. Direct Adaptive Fuzzy Controller (DAFC). Control law u(t) in feedback linearization m...
Background and objectives: Plumeria rubra L. (Apocynaceae) is a deciduous shrub or small tree cultivated in subtropical and tropical countries. Its bark is prescribed to treat amoebic dysentery, dropsy, jaundice, scabies, gonorrhea, venereal affections and wounds. In the present research, we aimed to isolate and identify the chemical constituents of the bark of ...
In this paper, we pay attention to the logical representation of codes. Then, the problem of detecting inconsistency becomes different from the conventional belief revision. Suppose the following pair of rules. ∆ = {α → β, α → ¬β} Note that ∆ is not inconsistent unless a fact α is supplied. Because the logical consequence of ∆ together with α produces both of β and ¬β, ∆ ∪ {α} ` {β,¬β}. Our mot...
We consider the two-electron position and momentum dot products, α = r1·r2 and β = p1·p2, and present a method for extracting their distributions, A(α) and B(β), from molecular wave functions built on Gaussian basis functions. The characteristics of the Hartree-Fock AHF(α) and BHF(β) for He and the first-row atoms are investigated, with particular attention to the effects of Pauli exchange. The...
in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...
The structural motif of α,α-difluoro-substituted carboxyl and carbonyl groups with hydroxy- or amino-substituents at the stereogenic carbon in β-position is found frequently drugs biologically active compounds. A straightforward method for obtaining those targets high enantiomeric purity given by asymmetric difluoro-Reformatsky imino-difluoro-Reformatsky reactions that lead to α,α-difluorinated...
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