Listar por tema "Engineering, Multidisciplinary"
Mostrando ítems 21-40 de 41
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MODELING, ANALYSIS AND RELIABILITY OF SEISMICALLY EXCITED STRUCTURES: COMPUTATIONAL ISSUES
(2008)A critical review of the current state of the art of the computing practices adopted by the earthquake engineering community is presented. Advanced computational tools are necessary for estimating the demand on seismically ... -
Multi-objective optimization in spatial planning: Improving the effectiveness of multi-objective evolutionary algorithms (non-dominated sorting genetic algorithm II)
(2015)The multi-objective nature of most spatial planning initiatives and the numerous constraints that are introduced in the planning process by decision makers, stakeholders, etc., synthesize a complex spatial planning context ... -
Non-overlapping Generation Species: Complex Prey-Predator Interactions
(2015)In this paper we study a prey-predator dynamical system suitable for species having no overlap between successive generations. Assuming that population evolves in discrete-time steps we investigate the prey refuge effect ... -
Numerical methods for porous metals with deformation-induced anisotropy
(2004)A constitutive model for porous metals subjected to general three-dimensional finite deformations is presented. The model takes into account the evolution of porosity and the development of anisotropy due to changes in the ... -
Numerical modeling of elasto-plastic porous materials with void shape effects at finite deformations
(2012)A new constitutive model for elasto-plastic (rate-independent) porous materials subjected to general three-dimensional finite deformations is presented. The new model results from simple modifications of an earlier model ... -
Output feedback decoupling of linear systems with nonlinear uncertain structure
(1996)The problem of input-output decoupling for linear systems with nonlinear uncertain structure, via an independent of the uncertainties static output feedback law, is solved. The necessary and sufficient conditions for the ... -
Pareto optimal sensor locations for structural identification
(2005)Theoretical and computational issues arising in the selection of the optimal sensor configuration for parameter estimation in structural dynamics are addressed. The objective is to optimally locate sensors in the structure ... -
A phenomenographic study of Greek primary school students' representations concerning technology in daily life
(2007)The present research investigated and studied students' representations about daily life technologies, in a prospect of studying technology in Greek primary education. In the research participated 60 Greek primary school ... -
Plane-Strain Problems for a Class of Gradient Elasticity Models-A Stress Function Approach
(2011)The plane strain problem is analyzed in detail for a class of isotropic, compressible, linearly elastic materials with a strain energy density function that depends on both the strain tensor epsilon and its spatial gradient ... -
Porous metals with developing anisotropy: Constitutive models, computational issues and applications to deformation processing
(2000)A constitutive model for a porous metal subjected to general three-dimensional finite deformations is presented. The model takes into account the evolution of porosity and the development of anisotropy due to changes in ... -
Robust triangular decoupling via output feedback
(2000)The problem of input-output triangular decoupling for linear systems with nonlinear uncertain structure, via an independent of the uncertainties static output feedback law, is solved. The necessary and sufficient conditions ... -
Solution of interface problems with nonmonotone contact and friction laws using a neural network optimization environment
(2004)The paper addresses the solution of interface problems which present a degrading behaviour leading to nonmonotone contact and friction laws. The paper is based on a superpotential formulation that leads to hemivariational ... -
A Spartan 6 FPGA-based data acquisition system for dedicated imagers in nuclear medicine
(2012)We present the development of a four-channel low-cost hardware system for data acquisition, with application in dedicated nuclear medicine imagers. A 12 bit octal channel high-speed analogue to digital converter, with up ... -
A Spartan3E-based low-cost system for gamma-ray detection in small single photon emission computed tomography or positron emission tomography systems
(2011)The development and assessment of a readout system based on field programmable gate arrays (FPGA) for dedicated nuclear medicine cameras is presented. We have used Xilinx Spartan3E starter kit, which is one of the simplest ... -
Structural model updating and prediction variability using Pareto optimal models
(2008)A multi-objective identification method for structural model updating based on modal residuals is presented. The method results in multiple Pareto optimal structural models that are consistent with the experimentally ... -
Study of the Residual Strength of an RC Shear Wall with Fractal Crack Taking into Account Interlocking Interface Phenomena
(2013)In the present paper, the postcracking strength of an RC shear wall element which follows the construction practices applied in Greece during the 70s is examined by taking into account the complex geometry of the crack of ... -
Thermogravimetric analysis of soot emitted by a modern diesel engine run on catalyst-doped fuel
(2003)Understanding the mechanisms that affect catalytic activity in porous ceramic diesel particulate filters (DPF) at the temperature range 200 to 400degreesC is important for the successful modeling of the initiation and ... -
Two-phase potentials in anisotropic elasticity: antiplane deformation
(1998)Based upon the Lekhnitskii-Eshelby approach of two-dimensional anisotropic elasticity, it is shown that only one holomorphic function can fully describe the antiplane deformation of a composite consisting of two discrete ... -
Two-phase potentials in the analysis of smart composites having piezoelectrical components
(1998)The piezoelectric smart composite material consisting of two discrete phases of hexagonal piezoelectric crystals is subjected to mechanical and electric loads causing out-of-plane displacement and in-plane electric field. ... -
The use of updated robust reliability measures in stochastic dynamical systems
(2013)This work explores the effect of using updated robust reliability measures in the context of stochastic structural dynamical systems. A Bayesian probabilistic methodology for model updating is first implemented for the ...