نتایج جستجو برای: λ
تعداد نتایج: 27860 فیلتر نتایج به سال:
مدل شیونو و نایت برای تعیین توزیع عرضی سرعت متوسط عمقی و تنش برشی نیازمند واسنجی است. تحقیق حاضر در راستای تدقیق پارامترهای مؤثر بر واسنجی مدل شیونو و نایت در کانال های ذوزنقه ای روباز تدوین شده است. انتخاب صحیح پارامترهای ضریب اصطکاک ( f )، جریان ثانویه ( γ ) و لزجت گردابی (λ) در تخمین دقیق توزیع عرضی تنش برشی نقش به سزایی دارند. برای این منظور از نتایج آزمایشگاهی محققین پیشین برای بهینه سازی...
Approximate solutions are obtained in implicit forms for the following general form of nonlinear Stefan problem ddx(1+δ1yp)dydx+2x(1+δ2yp)dydx=4Steβ(x),0<x<λ, with y(0)=1,y(λ)=0, where λ>0 is a solution to equation y′(λ)=−2λSte, δi>−1,i=1,2,p>0, and Ste number, which represents phase-change temperature-dependent thermal parameters (i.e., conductivity specific heat) on (0,λ).
This work describes the design and implementation of Λ◦λ, a general-purpose software library for lattice cryptography, written in the functional and strongly typed language Haskell. In comparison with several prior implementations of lattice-based cryptographic schemes, Λ◦λ has several novel and distinguishing features, which include: • Generality and modularity: Λ◦λ defines simple but general ...
We study the differential decay rate for the rare Λb → Λ(→ Nπ)`+`− transition, including a determination of the complete angular distribution, assuming unpolarized Λb baryons. On the basis of a properly chosen parametrization of the various helicity amplitudes, we provide expressions for the angular observables within the Standard Model and a subset of new physics models with chirality-flipped ...
By using techniques of unitarized chiral perturbation theory, where the Λ(1405) and Λ(1670) resonances are dynamically generated, we evaluate the magnetic moments of these resonances and their transition magnetic moment. The results obtained here differ appreciably from those obtained with existing quark models. The width for the Λ(1670) → Λ(1405)γ transition is also evaluated leading to a bran...
Calculations of the polarization of Λ and ¯ Λ particles after fragmentation of a polarized quark produced in processes like Z-decay and deep inelas-tic polarized lepton scattering must include Λ and ¯ Λ produced as decay products of Σ 0 and Σ * as well as those produced directly. These decay contributions are significant and not feasibly included in theoretical calculations based on QCD without...
In the present paper, K denotes a complete, non-trivially valued, ultrametric (or non-archimedean) field. Entries of sequences, infinite series and matrices are in K. Following Kangro [2, 3, 4], we introduce concept boundedness with speed λ or λ-boundedness. We then obtain characterization matrix class (mλ , mµ ), where mλ set all λ-bounded sequences conclude paper remark about (c c λ-convergent
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