نتایج جستجو برای: variable cross section beam
تعداد نتایج: 955323 فیلتر نتایج به سال:
This paper deals with the study of the behaviour of a slender beam introduced in a cylindrical tube and subjected to an axial compressive force. The beam is very long compared to its transversal dimensions and therefore it will buckle to a very small axial force. The post-buckling behaviour is examined. The study has important applications in the petroleum industry, for coiled tubing in the cas...
QCD-based models predict many N* states that decay through modes that have yet to be measured or precisely identified. These decay mechanisms give insight into the underlying symmetries of the excited-baryon states. There are competing models for the quark symmetries and dynamics ranging from preferentially paired-quark distributions to hybrid gluonic excitations. Measurement of the differentia...
A functionally graded material beam with generalized boundary conditions is contemplated in the present study in order to examine the deformation and stress behavior under thermal and thermo-mechanical load. Three discrete combinations of functionally graded materials have been deliberate in including a wide range of materials and material properties. The variation of material properties has be...
The production of neutrons carrying at least 20% of the proton beam energy (xL > 0.2) in e+p collisions has been studied with the ZEUS detector at HERA for a wide range of Q2, the photon virtuality, from photoproduction to deep inelastic scattering. The neutron-tagged cross section, ep → eXn, is measured relative to the inclusive cross section, ep → eX, thereby reducing the systematic uncertain...
in this paper, eringen’s nonlocal elasticity and timoshenko beam theories are implemented to analyze the bending vibration for non-uniform nano-beams. the governing equations and the boundary conditions are derived using hamilton’s principle. a generalized differential quadrature method (gdqm) is utilized for solving the governing equations of non-uniform timoshenko nano-beam for pinned-pinned...
The reaction γp → πp is investigated in the energy range above the resonance region. The amplitudes include the leading Regge singularities in the cross-channel and correctly describe the differential cross section for beam energies above 4 GeV and for momentum transferred above −3 GeV. The energy dependence of the beam asymmetry and the reaction γn → πn seem is quantitative consistent with the...
Using a merged-beam technique, the absolute, total electron-capture cross section has been measured for collisions of Ne ions with hydrogen ~deuterium! atoms at collision energies between 139 and 1490 eV/u. These data are compared to three other published measurements, two of which differ from one another by a factor greater than two. Early quantal rate coefficient calculations for Ne ions with...
New preliminary electroweak results from the HERA lepton-proton collider experiments H1 and ZEUS are presented. These include new high Q neutral current cross section measurements, limits on a possible quark radius in the search for contact interactions as well as on quark-Z coupling parameters, extracted in combined electroweak and QCD fits. Furthermore, new charged current cross section measu...
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