نتایج جستجو برای: transition point

تعداد نتایج: 768411  

Journal: :Chaos 2021

Percolation transition (PT) means the formation of a macroscopic-scale large cluster, which exhibits continuous transition. However, when growth clusters is globally suppressed, type PT changed to discontinuous for random networks. A question arises as whether also scale-free (SF) network, because existence hubs incites giant cluster. Here, we apply global suppression rule static model SF netwo...

Journal: :کشاورزی (منتشر نمی شود) 0
محمود مشعل استادیار گروه آبیاری، پردیس ابوریحان، دانشگاه تهران، پاکدشت، تهران دیوید ج. بال دانشیار گروه عمران، دانشگاه منچستر، منچستر، انگلستان

complex culverts have a change of section (transition) at one or more positions along their lengths. the hydraulic performance cannot be estimated using simple culvert methods because the transition may change the control point. by modeling the flow through a transition as free flow, sluice flow, pipe flow and treating a complex culvert, as a series of simple culverts with the appropriate hydra...

Journal: :Physical review letters 1996
Jersák Lang Neuhaus

The line of phase transitions, separating the confinement and the Coulomb phases in the four-dimensional pure compact U(1) gauge theory with extended Wilson action, is reconsidered. We present new numerical evidence that a part of this line, including the original Wil-son action, is of second order. By means of a high precision simulation on homogeneous lattices on a sphere we find that along t...

Journal: :Physical review. D, Particles and fields 1995
Shapiro Cognola

At high energy scale the only quantum effect of any asymptotic free and asymptoti-cally conformal invariant GUT is the trace anomaly of the energy-momentum tensor. Anomaly generates the new degree of freedom, that is propagating conformal factor. At lower energies conformal factor starts to interact with scalar field because of the violation of conformal invari-ance. We estimate the effect of s...

Journal: :Physical review. E 2016
Xiaofeng Qian Youjin Deng Yuhai Liu Wenan Guo Henk W J Blöte

We investigate the two-dimensional q=3 and 4 Potts models with a variable interaction range by means of Monte Carlo simulations. We locate the phase transitions for several interaction ranges as expressed by the number z of equivalent neighbors. For not-too-large z, the transitions fit well in the universality classes of the short-range Potts models. However, at longer ranges, the transitions b...

Journal: :پژوهش های علوم دامی ایران 0
فاطمه امرایی هدایت اله روشنفکر جمال فیاضی محمد بوجارپور

identification of associated genes with energy balance, yield and feed intake are recent interests of the animal breeding researchers. najdi breed is the famous cattle breed in the khuzestan province. in this research for the investigation of leptin gene promoter ,from 15 najdi cows in the shushtar cattle center station was taken. dna from whole blood was extracted and 544bp and 566 bp two piec...

Journal: :علوم گیاهان زراعی ایران 0
شهریار ساسانی استادیار مرکز تحقیقات کشاورزی کرمانشاه رضا توکل افشاری استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران سیروس محفوظی دانشیار موسسه تحقیقات نهال و بذر کرج بن ترواسکیس استاد مرکز تحقیقات کشاورزی استرالیا

frost tolerance of winter wheat depends primarily on a strong vernalization requirement, delaying the transition to reproductive phase. the responses of four bread wheat cultivars (triticum aestivum l.) to low-temperatures were examined in controlled environment and field conditions. prolonged cold treatment accelerated the transition to reproductive development in winter wheats (cv. norstar an...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2008
Cécile Monthus Thomas Garel

We study the wetting transition and the directed polymer delocalization transition on diamond hierarchical lattices. These two phase transitions with frozen disorder correspond to the critical points of quadratic renormalizations of the partition function. (These exact renormalizations on diamond lattices can also be considered as approximate Migdal-Kadanoff renormalizations for hypercubic latt...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2001
G Korniss C J White P A Rikvold M A Novotny

We study the two-dimensional kinetic Ising model below its equilibrium critical temperature, subject to a square-wave oscillating external field. We focus on the multidroplet regime, where the metastable phase decays through nucleation and growth of many droplets of the stable phase. At a critical frequency, the system undergoes a genuine nonequilibrium phase transition, in which the symmetry-b...

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