Search results for "Paz"
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Seju un logo aptazīšanas tīmekļa sistēma
2017
Šajā dokumentā ir aprakstīta seju un logo atpazīšanas tīmekļa sistēma, kas paredzēta attēlos attēlotu seju atrašanai un no šīm sejām sistēmāievietoto seju atpazīšanai, kā arī attēlos redzamo logotipu, kas ievietoti sistēmā, atpazīšanai. Sistēmai tika aprakstīta veidota tikai aizmugures daļa, jo lietotāju saskarni implementēs pasūtītājs. Sistēma realizēta, izmantojot ārējus moduļus, Docker platformā. Tā implementēta Python valodā, izmantojot Flask ietvaru.
Advances in Fracture and Damage Mechanics XII
2014
The proceedings contain 170 papers. The topics discussed include: structural integrity of a shaft subjected to multiaxial fatigue loads in presence of short crack; blunt cracks and two parameter fracture criteria; flexural and shear capacity evaluation of reinforced ultra-high strength concrete members with steel rebars; evolution of shear localization in an elasto-plastic cosserat material under shearing; experimental soil - concrete plate interaction test and numerical models; modeling microstructural effects on the mechanical behavior of a friction stirred channel aluminum alloy; nonlinear thermo-mechanical coupled modeling for the analysis of stress distribution in air-plasma-sprayed th…
A four-node MITC finite element for magneto-electro-elastic multilayered plates
2013
An isoparametric four-node finite element for multilayered magneto-electro-elastic plates analysis is presented. It is based on an equivalent single-layer model, which assumes the first order shear deformation theory and quasi-static behavior for the electric and magnetic fields. First, the electro-magnetic state of the plate is determined in terms of the mechanical primary variables, namely the generalized displacements, by solving the strong form of the magneto-electric governing equations coupled with the electro-magnetic interface continuity conditions and the external boundary conditions. In turn, this result is used into the layers constitutive law to infer the equivalent single-layer…
A finite element formulation for large deflection of multilayered magneto-electro-elastic plates
2014
An original finite element formulation for the analysis of large deflections in magneto-electro-elastic multilayered plates is presented. The formulation is based on an equivalent single-layer model in which first order shear deformation theory with von Karman strains and quasi-static behavior for the electric and magnetic fields are assumed. To obtain the plate model, the electro-magnetic state is firstly determined and condensed to the mechanical primary variables, namely the generalized displacements. In turn, this result is used to obtain laminate effective stiffness coefficients that allow to express the plate mechanical stress resultants in terms of the generalized displacements and a…
A non-linear Ritz method for progressive failure analysis of variable angle tow composite laminates
2022
A Ritz formulation for non-linear analysis of damage initiation and evolution in variable angle tow composite plates under progressive loading is presented. The model is built on a few key items. It assumes first order shear deformation theory kinematics and non-liner strains in the von Karman sense. The constitutive relationships are formulated in the framework of continuum damage mechanics at the ply level, so that each laminate layer can experience in-plane damage initiation and evolution, then reflected in material softening and loss of local stiffness. A Ritz polynomial expansion of the primary variables and the minimization of the total potential energy provide the discrete solution e…
An integral framework for computational thermo-elastic homogenization of polycrystalline materials
2023
A grain scale framework for thermo-elastic analysis and computational homogenization of polycrystalline materials is proposed. The morphology of crystal aggregates is represented employing Voronoi tessellations, which retain the main statistical features of polycrystalline materials. The behaviour of the individual grains is modelled starting from an integral representation for anisotropic thermo-elasticity, which is numerically addressed through a dual reciprocity boundary element method. The integrity of the aggregate is enforced through suitable intergranular thermo-elastic continuity conditions. By virtue of the features of the underlying formulation, the polycrystalline thermo-elastic …
A coupled plasticity-damage cohesive-frictional interface for low-cycle fatigue analysis
2022
A novel thermodynamically consistent cohesive-frictional model for the analysis of interface degradation and failure under either monotonic quasi-static loading or cyclic loading in low-cycle fatigue problems is proposed. Starting from the definition of a suitable Helmholtz energy density function, a phenomenological interface model is developed in the framework of plasticity and damage mechanics. In particular, a coupled plasticitydamage activation function is defined and employed together the consistent evolution rules to capture the evolution of damage and plasticity under the action of the external loads. Due to the specific features of such threshold and flow rules, the initiation and …
A discontinuous Galerkin formulation for nonlinear analysis of multilayered shells refined theories
2023
A novel pure penalty discontinuous Galerkin method is proposed for the geometrically nonlinear analysis of multilayered composite plates and shells, modelled via high-order refined theories. The approach allows to build different two-dimensional equivalent single layer structural models, which are obtained by expressing the covariant components of the displacement field through-the-thickness via Taylor’s polynomial expansion of different order. The problem governing equations are deduced starting from the geometrically nonlinear principle of virtual displacements in a total Lagrangian formulation. They are addressed with a pure penalty discontinuous Galerkin method using Legendre polynomial…
Raiņa un Aspazijas reprezentācija laikrakstos "Diena", "Neatkarīgā Rīta Avīze" un to pielikumos 2015. gadā
2016
Tautā dēvētais Raiņa un Aspazijas gads ir aizvadīts. Tas tika īpaši atzīmēts, cilvēki pievērsa pastiprinātu uzmanību abu dzejnieku daiļradei un tautas devumam. 2015. jeb jubilejas gads īpaši izcēla abu dzejnieku tēla atpazīstamību, tāpat arī padarīja populārāku viņu daiļradi. Mediji ir viens no instrumentiem, kas vēstī par tiem. Akadēmiskā bakalaura darba “Raiņa un Aspazijas reprezentācija laikrakstos “Diena”, “Neatkarīgā Rīta Avīze” un to pielikumos 2015. gadā” teorētiskajā daļā apskatīti jēdzieni “sociālā atmiņa”, “mediju notikums”, “reprezentācija”, sniedz iespēju izprast priekšstatu veidošanos cilvēkam, konkrētajā gadījumā – par Raini un Aspaziju. Dzejnieku dzīves gājuma pētīšana sniedz…
La Tecnologia. Struttura economica e produttività
2012
Il capitolo indaga l'evoluzione della struttura produttiva in 24 paesi del mediterraneo dal 1980 al 2010 e valuta come il cambiamento strutturale è associato a variazioni della produttività nei diversi paesi e settori. The chapter offers and inquiry into the evolution of the economic structure of 24 Mediterranean countries from 1980 to 2010 and examines how structural change is associated to productivity growth in different sectors and countries.