Advances in Mathematical Physics
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© 2016 , Hindawi Publishing Corporation . All rights reserved.

Remarks on ChernSimonsHiggs Equations in
Thu, 22 Sep 2016 13:46:23 +0000
http://www.hindawi.com/journals/amp/2016/9830474/
We prove global existence of solutions to ChernSimonsHiggs equations under the gauge condition . We also find stationary solutions.
Hyungjin Huh and Guanghui Jin
Copyright © 2016 Hyungjin Huh and Guanghui Jin. All rights reserved.

The Strict AKNS Hierarchy: Its Structure and Solutions
Thu, 08 Sep 2016 09:16:48 +0000
http://www.hindawi.com/journals/amp/2016/3649205/
We discuss an integrable hierarchy of compatible Lax equations that is obtained by a wider deformation of a commutative algebra in the loop space of than that in the AKNS case and whose Lax equations are based on a different decomposition of this loop space. We show the compatibility of these Lax equations and that they are equivalent to a set of zero curvature relations. We present a linearization of the system and conclude by giving a wide construction of solutions of this hierarchy.
G. F. Helminck
Copyright © 2016 G. F. Helminck. All rights reserved.

Lie Subalgebras of the Matrix Quantum Pseudodifferential Operators
Wed, 07 Sep 2016 16:52:29 +0000
http://www.hindawi.com/journals/amp/2016/9218693/
We give a complete description of the antiinvolutions that preserve the principal gradation of the algebra of matrix quantum pseudodifferential operators and we describe the Lie subalgebras of their minus fixed points.
Karina Batistelli and Carina Boyallian
Copyright © 2016 Karina Batistelli and Carina Boyallian. All rights reserved.

Fractal Dimension versus Process Complexity
Wed, 07 Sep 2016 11:33:22 +0000
http://www.hindawi.com/journals/amp/2016/5030593/
We look at small Turing machines (TMs) that work with just two colors (alphabet symbols) and either two or three states. For any particular such machine and any particular input , we consider what we call the spacetime diagram which is basically the collection of consecutive tape configurations of the computation . In our setting, it makes sense to define a fractal dimension for a Turing machine as the limiting fractal dimension for the corresponding spacetime diagrams. It turns out that there is a very strong relation between the fractal dimension of a Turing machine of the abovespecified type and its runtime complexity. In particular, a TM with three states and two colors runs in at most linear time, if and only if its dimension is 2, and its dimension is 1, if and only if it runs in superpolynomial time and it uses polynomial space. If a TM runs in time , we have empirically verified that the corresponding dimension is , a result that we can only partially prove. We find the results presented here remarkable because they relate two completely different complexity measures: the geometrical fractal dimension on one side versus the time complexity of a computation on the other side.
Joost J. Joosten, Fernando SolerToscano, and Hector Zenil
Copyright © 2016 Joost J. Joosten et al. All rights reserved.

Two Kinds of DarbouxBäcklund Transformations for the Deformed KdV Hierarchy with SelfConsistent Sources
Wed, 07 Sep 2016 09:28:21 +0000
http://www.hindawi.com/journals/amp/2016/8153752/
Two kinds of DarbouxBäcklund transformations (DBTs) are constructed for the deformed th KdV hierarchy with selfconsistent sources (NKdVHSCS) by using the deformed pseudodifferential operators. Note that one of the DBTs provides a nonauto Bäcklund transformation for two deformed th KdV equations with selfconsistent sources (NKdVESCS) with different degree. In addition, the soliton solution to the first nontrivial equation of KdVHSCS is also obtained.
Hongxia Wu, Liangjuan Gao, Jingxin Liu, and Yunbo Zeng
Copyright © 2016 Hongxia Wu et al. All rights reserved.

Controlling NeimarkSacker Bifurcation in Delayed Species Model Using Feedback Controller
Sun, 04 Sep 2016 09:40:43 +0000
http://www.hindawi.com/journals/amp/2016/2028037/
Based on the stability and orthogonal polynomial approximation theory, the ordinary, dislocated, enhancing, and random feedback control methods are used to suppress the NeimarkSacker bifurcation to fixed point in this paper. It is shown that the convergence rate of enhancing feedback control and random feedback control can be faster than those of dislocated and ordinary feedback control. The random feedback control method, which does not require any adjustable control parameters of the model, just only slightly changes the random intensity. Finally, numerical simulations are presented to verify the effectiveness of the proposed controllers.
Jie Ran, Yanmin Liu, Jun He, and Xiang Li
Copyright © 2016 Jie Ran et al. All rights reserved.

On the Definition of Energy for a Continuum, Its Conservation Laws, and the EnergyMomentum Tensor
Wed, 31 Aug 2016 16:18:18 +0000
http://www.hindawi.com/journals/amp/2016/9679460/
We review the energy concept in the case of a continuum or a system of fields. First, we analyze the emergence of a true local conservation equation for the energy of a continuous medium, taking the example of an isentropic continuum in Newtonian gravity. Next, we consider a continuum or a system of fields in special relativity: we recall that the conservation of the energymomentum tensor contains two local conservation equations of the same kind as before. We show that both of these equations depend on the reference frame and that, however, they can be given a rigorous meaning. Then, we review the definitions of the canonical and Hilbert energymomentum tensors from a Lagrangian through the principle of stationary action in general spacetime. Using relatively elementary mathematics, we prove precise results regarding the definition of the Hilbert tensor field, its uniqueness, and its tensoriality. We recall the meaning of its covariant conservation equation. We end with a proof of uniqueness of the energy density and flux, when both depend polynomially on the fields.
Mayeul Arminjon
Copyright © 2016 Mayeul Arminjon. All rights reserved.

Classical Logic and Quantum Logic with Multiple and Common Lattice Models
Wed, 31 Aug 2016 10:19:25 +0000
http://www.hindawi.com/journals/amp/2016/6830685/
We consider a proper propositional quantum logic and show that it has multiple disjoint lattice models, only one of which is an orthomodular lattice (algebra) underlying Hilbert (quantum) space. We give an equivalent proof for the classical logic which turns out to have disjoint distributive and nondistributive ortholattices. In particular, we prove that both classical logic and quantum logic are sound and complete with respect to each of these lattices. We also show that there is one common nonorthomodular lattice that is a model of both quantum and classical logic. In technical terms, that enables us to run the same classical logic on both a digital (standard, twosubset, 01bit) computer and a nondigital (say, a sixsubset) computer (with appropriate chips and circuits). With quantum logic, the same sixelement common lattice can serve us as a benchmark for an efficient evaluation of equations of bigger lattice models or theorems of the logic.
Mladen Pavičić
Copyright © 2016 Mladen Pavičić. All rights reserved.

Characterizations of Fuzzy Ideals in Coresiduated Lattices
Tue, 30 Aug 2016 08:24:20 +0000
http://www.hindawi.com/journals/amp/2016/6423735/
The notions of fuzzy ideals are introduced in coresiduated lattices. The characterizations of fuzzy ideals, fuzzy prime ideals, and fuzzy strong prime ideals in coresiduated lattices are investigated and the relations between ideals and fuzzy ideals are established. Moreover, the equivalence of fuzzy prime ideals and fuzzy strong prime ideals is proved in prelinear coresiduated lattices. Furthermore, the conditions under which a fuzzy prime ideal is derived from a fuzzy ideal are presented in prelinear coresiduated lattices.
Yan Liu and Mucong Zheng
Copyright © 2016 Yan Liu and Mucong Zheng. All rights reserved.

Curing Black Hole Singularities with Local Scale Invariance
Mon, 29 Aug 2016 07:21:03 +0000
http://www.hindawi.com/journals/amp/2016/6095236/
We show that Weylinvariant dilaton gravity provides a description of black holes without classical spacetime singularities. Singularities appear due to the ill behaviour of gauge fixing conditions, one example being the gauge in which theory is classically equivalent to standard General Relativity. The main conclusions of our analysis are as follows: (1) singularities signal a phase transition from broken to unbroken phase of Weyl symmetry; (2) instead of a singularity, there is a “baby universe” or a white hole inside a black hole; (3) in the baby universe scenario, there is a critical mass after which reducing mass makes the black hole larger as viewed by outside observers; (4) if a black hole could be connected with white hole through the “singularity,” this would require breakdown of (classical) geometric description; (5) the singularity of Schwarzschild BH solution is nongeneric and so it is dangerous to rely on it in deriving general results. Our results may have important consequences for resolving issues related to information loss puzzle. Though quantum effects are still crucial and may change the proposed classical picture, a position of building quantum theory around essentially regular classical solutions normally provides a much better starting point.
Predrag Dominis Prester
Copyright © 2016 Predrag Dominis Prester. All rights reserved.

The BiIntegrable Couplings of TwoComponent CasimirQiaoLiu Type Hierarchy and Their Hamiltonian Structures
Sun, 28 Aug 2016 14:19:01 +0000
http://www.hindawi.com/journals/amp/2016/6347961/
A new type of twocomponent CasimirQiaoLiu type hierarchy (2CQLTH) is produced from a new spectral problem and their biHamiltonian structures are constructed. Particularly, a new completely integrable twocomponent CasimirQiaoLiu type equation (2CQLTE) is presented. Furthermore, based on the semidirect sums of matrix Lie algebras consisting of block matrix Lie algebra, the biintegrable couplings of the 2CQLTH are constructed and their biHamiltonian structures are furnished.
Juhui Zhang and Yuqin Yao
Copyright © 2016 Juhui Zhang and Yuqin Yao. All rights reserved.

A Numberable Set of Exact Solutions for the Macroscopic Approach to Extended Thermodynamics of Polyatomic Gases with Many Moments
Thu, 25 Aug 2016 12:09:40 +0000
http://www.hindawi.com/journals/amp/2016/1307813/
A new model for Polyatomic Gases with an arbitrary but fixed number of moments has been recently proposed and investigated in the framework of Extended Thermodynamics; the arbitrariness of the number of moments is linked to a number and the resulting model is called an Model. This model has been elaborated in order to take into account the entropy principle, the Galilean relativity principle, and some symmetry conditions. It has been proved that the solution for all these conditions exists, but it has not been written explicitly because hard notation is necessary; it has only been shown how the theory is selfgenerating in the sense that if we know the closure of the Model, then we will be able to find that of Model. Up to now only a single particular solution has been found in this regard. Instead of this, we find here a numberable set of exact solutions which hold for every fixed number .
Maria Cristina Carrisi, Rita Enoh Tchame, Marcel Obounou, and Sebastiano Pennisi
Copyright © 2016 Maria Cristina Carrisi et al. All rights reserved.

From Boole to LeggettGarg: Epistemology of BellType Inequalities
Thu, 25 Aug 2016 11:22:12 +0000
http://www.hindawi.com/journals/amp/2016/4623040/
In 1862, George Boole derived an inequality for variables that represents a demarcation line between possible and impossible experience. This inequality forms an important milestone in the epistemology of probability theory and probability measures. In 1985 Leggett and Garg derived a physics related inequality, mathematically identical to Boole’s, that according to them represents a demarcation between macroscopic realism and quantum mechanics. We show that a wide gulf separates the “sense impressions” and corresponding data, as well as the postulates of macroscopic realism, from the mathematical abstractions that are used to derive the inequality of Leggett and Garg. If the gulf can be bridged, one may indeed derive the said inequality, which is then clearly a demarcation between possible and impossible experience: it cannot be violated and is not violated by quantum theory. This implies that the LeggettGarg inequality does not mean that the SQUID flux is not there when nobody looks, as Leggett and Garg suggest, but instead that the probability measures may not be what Leggett and Garg have assumed them to be, when no data can be secured that directly relate to them. We show that similar considerations apply to other quantum interpretationpuzzles such as twoslit experiments.
Karl Hess, Hans De Raedt, and Kristel Michielsen
Copyright © 2016 Karl Hess et al. All rights reserved.

TwoDimensional Nonlinear Propagation of Ion Acoustic Waves through KPB and KP Equations in Weakly Relativistic Plasmas
Wed, 24 Aug 2016 08:11:15 +0000
http://www.hindawi.com/journals/amp/2016/9352148/
Twodimensional threecomponent plasma system consisting of nonextensive electrons, positrons, and relativistic thermal ions is considered. The wellknown KadomtsevPetviashviliBurgers and KadomtsevPetviashvili equations are derived to study the basic characteristics of small but finite amplitude ion acoustic waves of the plasmas by using the reductive perturbation method. The influences of positron concentration, electronpositron and ionelectron temperature ratios, strength of electron and positrons nonextensivity, and relativistic streaming factor on the propagation of ion acoustic waves in the plasmas are investigated. It is revealed that the electrostatic compressive and rarefactive ion acoustic waves are obtained for superthermal electrons and positrons, but only compressive ion acoustic waves are found and the potential profiles become steeper in case of subthermal positrons and electrons.
M. G. Hafez, M. R. Talukder, and M. Hossain Ali
Copyright © 2016 M. G. Hafez et al. All rights reserved.

Higher Spin Symmetries of the Free Schrödinger Equation
Sun, 21 Aug 2016 11:18:39 +0000
http://www.hindawi.com/journals/amp/2016/5739410/
It is shown that the Schrödinger symmetry algebra of a free particle in spatial dimensions can be embedded into a representation of the higher spin algebra. The latter spans an infinite dimensional algebra of higherorder symmetry generators of the free Schrödinger equation. An explicit representation of the maximal finite dimensional subalgebra of the higher spin algebra is given in terms of nonrelativistic generators. We show also how to convert Vasiliev’s equations into an explicit nonrelativistic covariant form, such that they might apply to nonrelativistic systems. Our procedure reveals that the space of solutions of the Schrödinger equation can be regarded also as a supersymmetric module.
Mauricio Valenzuela
Copyright © 2016 Mauricio Valenzuela. All rights reserved.

A Mixed Finite Element Formulation for the Conservative Fractional Diffusion Equations
Tue, 16 Aug 2016 07:35:49 +0000
http://www.hindawi.com/journals/amp/2016/9398265/
We consider a boundaryvalue problem of oneside conservative elliptic equation involving RiemannLiouville fractional integral. The appearance of the singular term in the solution leads to lower regularity of the solution of the equation, so to the lower order convergence rate for the numerical solution. In this paper, by the dividing of equation, we drop the lower regularity term in the solution successfully and get a new fractional elliptic equation which has full regularity. We present a theoretical framework of mixed finite element approximation to the new fractional elliptic equation and derive the error estimates for unknown function, its derivative, and fractionalorder flux. Some numerical results are illustrated to confirm the optimal error estimates.
Suxiang Yang and Huanzhen Chen
Copyright © 2016 Suxiang Yang and Huanzhen Chen. All rights reserved.

Strong Isomorphism in EisertWilkensLewenstein Type Quantum Games
Sun, 14 Aug 2016 07:12:15 +0000
http://www.hindawi.com/journals/amp/2016/4180864/
The aim of this paper is to bring together the notions of quantum game and game isomorphism. The work is intended as an attempt to introduce a new criterion for quantum game schemes. The generally accepted requirement forces a quantum scheme to generate the classical game in a particular case. Now, given a quantum game scheme and two isomorphic classical games, we additionally require the resulting quantum games to be isomorphic as well. We are concerned with the EisertWilkensLewenstein quantum game scheme and the strong isomorphism between games in strategic form.
Piotr Frąckiewicz
Copyright © 2016 Piotr Frąckiewicz. All rights reserved.

Formal First Integrals of General Dynamical Systems
Tue, 09 Aug 2016 12:18:33 +0000
http://www.hindawi.com/journals/amp/2016/1036089/
The goal of this paper is trying to make a complete study on the integrability for general analytic nonlinear systems by first integrals. We will firstly give an exhaustive discussion on analytic planar systems. Then a class of higher dimensional systems with invariant manifolds will be considered; we will develop several criteria for existence of formal integrals and give some applications to illustrate our results at last.
Jia Jiao, Wenlei Li, and Qingjian Zhou
Copyright © 2016 Jia Jiao et al. All rights reserved.

Theory of Nonlocal Point Transformations in General Relativity
Mon, 08 Aug 2016 07:10:28 +0000
http://www.hindawi.com/journals/amp/2016/9619326/
A discussion of the functional setting customarily adopted in General Relativity (GR) is proposed. This is based on the introduction of the notion of nonlocal point transformations (NLPTs). While allowing the extension of the traditional concept of GRreference frame, NLPTs are important because they permit the explicit determination of the map between intrinsically different and generally curved spacetimes expressed in arbitrary coordinate systems. For this purpose in the paper the mathematical foundations of NLPTtheory are laid down and basic physical implications are considered. In particular, explicit applications of the theory are proposed, which concern a solution to the socalled Einstein teleparallel problem in the framework of NLPTtheory; the determination of the tensor transformation laws holding for the acceleration 4tensor with respect to the group of NLPTs and the identification of NLPTacceleration effects, namely, the relationship established via general NLPT between particle 4acceleration tensors existing in different curved spacetimes; the construction of the nonlocal transformation law connecting different diagonal metric tensors solution to the Einstein field equations; and the diagonalization of nondiagonal metric tensors.
Massimo Tessarotto and Claudio Cremaschini
Copyright © 2016 Massimo Tessarotto and Claudio Cremaschini. All rights reserved.

Vector Solitons of a Coupled Schrödinger System with Variable Coefficients
Thu, 04 Aug 2016 07:59:34 +0000
http://www.hindawi.com/journals/amp/2016/5787508/
We show the existence of waveforms of finiteenergy (vector solitons) for a coupled nonlinear Schrödinger system with inhomogeneous coefficients. Furthermore, some of these solutions are approximated using a Newtontype iteration, combined with a collocationspectral strategy to discretize the corresponding soliton equations. Some numerical simulations concerned with analysis of a collision of two oncoming vector solitons of the system are also performed.
Juan Carlos Muñoz Grajales
Copyright © 2016 Juan Carlos Muñoz Grajales. All rights reserved.

Explicit Solutions of the Boundary Value Problems for an Ellipse with Double Porosity
Sun, 31 Jul 2016 12:53:50 +0000
http://www.hindawi.com/journals/amp/2016/1810795/
The basic twodimensional boundary value problems of the fully coupled linear equilibrium theory of elasticity for solids with double porosity structure are reduced to the solvability of two types of a problem. The first one is the BVPs for the equations of classical elasticity of isotropic bodies, and the other is the BVPs for the equations of pore and fissure fluid pressures. The solutions of these equations are presented by means of elementary (harmonic, metaharmonic, and biharmonic) functions. On the basis of the gained results, we constructed an explicit solution of some basic BVPs for an ellipse in the form of absolutely uniformly convergent series.
Lamara Bitsadze and Natela Zirakashvili
Copyright © 2016 Lamara Bitsadze and Natela Zirakashvili. All rights reserved.

Electromagnetic Scattering at the Waveguide Step between Equilateral Triangular Waveguides
Sun, 31 Jul 2016 11:47:18 +0000
http://www.hindawi.com/journals/amp/2016/2974675/
The analysis of the electromagnetic scattering at discontinuities between equilateral triangular waveguides is studied. The complete electromagnetic solution is derived using analytical closed form expressions for the mode spectrum of the equilateral waveguide. The mathematical formulation of the electromagnetic scattering problem is based on the quasianalytical ModeMatching method. This method benefits from the electromagnetic field division into symmetries as well as from the plane wave formulation presented for the expressions involved. The unification of the surface integrals used in the method thanks to the plane wave formulation is revealed, leading to expressions that are very well suited for its implementation in an electromagnetic analysis and design code. The obtained results for some cases of interest (building blocks for microwave components for communication systems) are verified using other numerical methods included in a commercial software package, showing the potential of the presented approach based on quasianalytic expressions.
Ana MoránLópez, Juan Córcoles, Jorge A. RuizCruz, José R. MontejoGarai, and Jesús M. Rebollar
Copyright © 2016 Ana MoránLópez et al. All rights reserved.

Elastic Equilibrium of Porous Cosserat Media with Double Porosity
Sun, 31 Jul 2016 10:06:36 +0000
http://www.hindawi.com/journals/amp/2016/4792148/
The static equilibrium of porous elastic materials with double porosity is considered in the case of an elastic Cosserat medium. The corresponding threedimensional system of differential equations is derived. Detailed consideration is given to the case of plane deformation. A twodimensional system of equations of plane deformation is written in the complex form and its general solution is represented by means of three analytic functions of a complex variable and two solutions of Helmholtz equations. The constructed general solution enables one to solve analytically a sufficiently wide class of plane boundary value problems of the elastic equilibrium of porous Cosserat media with double porosity. A concrete boundary value problem for a concentric ring is solved.
Roman Janjgava
Copyright © 2016 Roman Janjgava. All rights reserved.

Thermal Stability Investigation in a Reactive Sphere of Combustible Material
Sun, 31 Jul 2016 08:30:21 +0000
http://www.hindawi.com/journals/amp/2016/9384541/
An investigation of thermal stability in a stockpile of combustible material is considered. The combustible material is any carbon containing material that can react with oxygen trapped in a stockpile due to exothermic chemical reaction. The complicated process is modelled in a sphere and onedimensional energy equation is used to solve the problem. The semiimplicit finite difference method (FDM) is applied to tackle the nonlinear differential equation governing the problem. Graphical solutions are displayed to describe effects of embedded kinetic parameters on the temperature of the system.
R. S. Lebelo
Copyright © 2016 R. S. Lebelo. All rights reserved.

Lax Triples for Integrable Surfaces in ThreeDimensional Space
Thu, 28 Jul 2016 09:55:15 +0000
http://www.hindawi.com/journals/amp/2016/8386420/
We study Lax triples (i.e., Lax representations consisting of three linear equations) associated with families of surfaces immersed in threedimensional Euclidean space . We begin with a natural integrable deformation of the principal chiral model. Then, we show that all deformations linear in the spectral parameter are trivial unless we admit Lax representations in a larger space. We present an explicit example of triply orthogonal systems with Lax representation in the group . Finally, the obtained results are interpreted in the context of the soliton surfaces approach.
Jan L. Cieśliński and Artur Kobus
Copyright © 2016 Jan L. Cieśliński and Artur Kobus. All rights reserved.

Drinfeld Realization of Quantum Twisted Affine Algebras via Braid Group
Wed, 27 Jul 2016 10:54:42 +0000
http://www.hindawi.com/journals/amp/2016/4843075/
The Drinfeld realization of quantum affine algebras has been tremendously useful since its discovery. Combining techniques of Beck and Nakajima with our previous approach, we give a complete and conceptual proof of the Drinfeld realization for the twisted quantum affine algebras using Lusztig’s braid group action.
Naihuan Jing and Honglian Zhang
Copyright © 2016 Naihuan Jing and Honglian Zhang. All rights reserved.

New Applications of a Kind of InfinitesimalOperator Lie Algebra
Mon, 25 Jul 2016 11:30:43 +0000
http://www.hindawi.com/journals/amp/2016/7639013/
Applying some reduced Lie algebras of Lie symmetry operators of a Lie transformation group, we obtain an invariant of a secondorder differential equation which can be generated by a EulerLagrange formulism. A corresponding discrete equation approximating it is given as well. Finally, we make use of the Lie algebras to generate some new integrable systems including () and () dimensions.
Honwah Tam, Yufeng Zhang, and Xiangzhi Zhang
Copyright © 2016 Honwah Tam et al. All rights reserved.

A Lipschitz Stability Estimate for the Inverse Source Problem and the Numerical Scheme
Wed, 20 Jul 2016 07:12:40 +0000
http://www.hindawi.com/journals/amp/2016/9504829/
We consider the inverse source problem for heat equation, where the source term has the form . We give a numerical algorithm to compute unknown source term . Also, we give a stability estimate in the case that is a piecewise constant function.
Xianzheng Jia
Copyright © 2016 Xianzheng Jia. All rights reserved.

A General Scheme for Information Interception in the PingPong Protocol
Sun, 17 Jul 2016 13:24:51 +0000
http://www.hindawi.com/journals/amp/2016/3162012/
The existence of undetectable eavesdropping of dense coded information has been already demonstrated by Pavičić for the quantum direct communication based on the pingpong paradigm. However, (a) the explicit scheme of the circuit is only given and no design rules are provided; (b) the existence of losses is implicitly assumed; (c) the attack has been formulated against qubit based protocol only and it is not clear whether it can be adapted to higher dimensional systems. These deficiencies are removed in the presented contribution. A new generic eavesdropping scheme built on a firm theoretical background is proposed. In contrast to the previous approach, it does not refer to the properties of the vacuum state, so it is fully consistent with the absence of losses assumption. Moreover, the scheme applies to the communication paradigm based on signal particles of any dimensionality. It is also shown that some well known attacks are special cases of the proposed scheme.
Piotr Zawadzki and Jarosław Adam Miszczak
Copyright © 2016 Piotr Zawadzki and Jarosław Adam Miszczak. All rights reserved.

Multidimensional Analysis of Plates with Irregularities Using HigherOrder Finite Elements Based on Lobatto Shape Functions
Wed, 13 Jul 2016 06:49:50 +0000
http://www.hindawi.com/journals/amp/2016/9413048/
Direct modeling and simulation of engineering problems with various irregularities are computationally very inefficient and in some cases impossible, even in these days of massively parallel computational systems. As a result, in recent times, a number of schemes have been put forward to tract such problems in a computationally efficient manner. Needless to say, such schemes are still going through evolutionary stages. This paper addresses direct solution based on the selective use of different dimensional models at different regions of the problem domain. For the multidimensional approach, a higherorder transition element is developed to connect the different element types where two and threedimensional laminated elements based on higherorder subparametric concept are considered. Modeling simplicity and calculation efficiency of the multidimensional approach are shown for the analysis of cantilever plates with stepped section and patchrepaired plates.
Jae S. Ahn
Copyright © 2016 Jae S. Ahn. All rights reserved.