نتایج جستجو برای: dual two
تعداد نتایج: 2557693 فیلتر نتایج به سال:
in this paper, we study spacelike dual biharmonic curves. we characterize spacelike dual biharmonic curves in terms of their curvature and torsion in the lorentzian dual heisenberg group . we give necessary and sufficient conditions for spacelike dual biharmonic curves in the lorentzian dual heisenberg group . therefore, we prove that all spacelike dual biharmonic curves are spacelike dual heli...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
We continue the study initiated in [LS] of the lattice (grid) generated by the incidence vectors of cocycles of a binary matroid and its dual lattice. In [LS], we proved that every denominator in the dual lattice is a power of 2, and characterized those binary matroids M for which the largest exponent k(M) is 1. In this paper, we characterize the matroids with k(M) = 2 and, for each constant k,...
In this study, heat transfer coefficients are measured for diesel-water two-phase flow in a horizontal pipe for dual continuous, dispersion of oil in water and dispersion of water in oil flow patterns. Flow patterns are observed using high speed photography for diesel-water mixture and two phase heat transfer data are obtained under a uniform heat flux boundary condition. The test section is a ...
Background: Respiratory virus infections represent a major public health problem because of their worldwide occurrence, ease of spread in the community and considerable morbidity and mortality. They are one of the most common reasons for hospitalization of children under the age of six. In some cases, infection with two different viruses increase the severity of disease which lead to the h...
which is chaotic on a particular parameter set, (σ, ρ, β) = (10, 28, 8/3)1 in the real parameter space of the general system (1); but for other parameter sets, system (1) may not be chaotic. The chaotic Lorenz system (2) has received sustained research interest in the literature since its discovery. For example, in [Tucker, 1999; Stewart, 2000], a rigorous proof confirms the existence of the ch...
the microstructure of dual phase steels can be considered as a matrix of ferrite phase reinforced by martensite particles. recent measurements show that the mechanical properties of the ferrite phase are changed with the distance from the martensite grains. in this paper, a new method has been proposed to consider this phenomenon in finite element modeling of dual phase steels microstructure. i...
A finite strain multiscale hydro-mechanical model is established via an extended Hill–Mandel condition for two-phase porous media. By assuming that the effective stress principle holds at unit cell scale, we established a micro-to-macro transition that links the micromechanical responses at grain scale to the macroscopic effective stress responses, while modeling the fluid phase only at the mac...
In this article we answer the complexity question of two dual criteria scheduling problems which had been open for a long time. Both problems are single machine scheduling problems and both have the number of tardy jobs as the primary criterion. However, the first problem has the total completion time and the second one has the total tardiness as the secondary criterion. We show that both probl...
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