Geometric analysis

Harmonic maps from Riemann surfaces arise from a conformally invariant variational problem. Therefore, on one hand, they are intimately connected with moduli spaces of Riemann surfaces, and on the other hand, because the conformal group is noncompact, constitute a prototype for the formation of singularities, the so-called bubbles, in geometric analysis.

29p viryucha2711 24-04-2019 12 0   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: A geometric analysis of hallux valgus: correlation with clinical assessment of severity...

8p thulanh25 06-12-2011 32 2   Download

Chapter G Convexity One major reason why linear spaces are so important for geometric analysis is that they allow us to define the notion of “line segment” in algebraic terms. Among other things, this enables one to formulate, purely algebraically, the notion of “convex set” which figures majorly in a variety of branches of higher mathematics.

55p summerflora 27-10-2010 66 6   Download

This thesis aims to develop finite element models for studying vibration of the 2D-FGM beam. These models require high reliability, good convergence speed and be able to evaluate the influence of material parameters, geometric parameters as well as being able to simulate the effect of shear deformation on vibration characteristics and dynamic responses of the 2D-FGM beam.

27p xacxuoc4321 08-07-2019 16 1   Download

This paper deals with the problem of inverse kinematics and dynamics of a measuring manipulator with kinematic redundancy which was designed and manufactured at Hanoi University of Technology for measuring the geometric tolerance of surfaces of machining components. A comparison between the calculation result and the experimental measurement is also presented.

12p thienthanquydu 17-10-2018 14 0   Download

In the present paper the non-linear buckling analysis of functionally graded spherical shells subj ected to external pressure is investigated. The material properties are graded in the t hickness direction according to the power-law distribution in terms of volume fractions of the constituents of the material. In t he formulation of governing equations geometric non-linearity in all strain-displacement relations of the shell is considered.

14p thienthanquydu 21-10-2018 18 0   Download

The present paper deals with a non-linear dynamical analysis of laminated reinforced composite doubly curved shallow shells. The motion equations of shell based upon the thin shell theory considering the geometrical non- linearity and the Lekhnitsky 's smeared stiffeners technique. Simultaneous ordinary differential equations arc obtained by means of l3ubnov-Galerkin 's procedure.

13p thienthanquydu 21-10-2018 18 0   Download

This paper proposes a method to establish the geometric stiffness matrix and stiffness matrix for semirigid beam element and semirigid beam element with rigidzones. The proposed method can also applied to analyse frame stability with rigid, sernirigid and simple connections with rigidzones or without rigidzones.

15p chikychiky 26-10-2018 10 0   Download

In the present paper, the Sawada–Kotera equation is considered by Lie symmetry analysis. All of the geometric vector fields to the Sawada–Kotera equation are obtained, and then the symmetry reductions and exact solutions of the Sawada–Kotera equation are investigated. Our results show that symmetry analysis is a very efficient and powerful technique in finding the solution of the proposed equation.

10p danhdanh27 07-01-2019 18 0   Download

The docking process is analyzed with the geometric method. Contact states in the docking process are explained in detail. At last, a simulation of six-module is shown that the modules can finish the docking process effectively.

5p praishy2 27-02-2019 5 0   Download

n this study, the influence of yield criteria was investigated to predict the failure of a reactor cavity under a typical postulated condition through detailed parametric finite element analyses. Further analyses using a geometrically simplified equivalent model with homogeneous concrete properties were also performed to examine its effectiveness as an alternative to the detailed reinforcement concrete model.

10p minhxaminhyeu5 30-06-2019 6 0   Download

Motivated by the diverse uses of concept maps in teaching and educational research, we have developed a systematic approach to their structural analysis. The basis for our method is a unique topological normalisation procedure whereby a concept map is first stripped of its content and subsequently geometrically re-arranged into a standardised layout as a maximally balanced tree following set rules.

17p kequaidan1 05-11-2019 7 0   Download

This paper presents analysis of thin plates with holes within the context of XFEM. New integration techniques are developed for exact geometrical representation of the holes. Numerical and exact integration techniques are presented, with some limitations for the exact integration technique. Simulation results show that the proposed techniques help to reduce the solution error, due to the exact geometrical representation of the holes and utilization of appropriate quadrature rules.

8p kequaidan1 16-11-2019 11 0   Download

The method of differential quadrature is employed to analyze the free vibration of a cracked cantilever beam resting on elastic foundation. The beam is made of a functionally graded material and rests on a Winkler–Pasternak foundation. The crack action is simulated by a line spring model. Also, the differential quadrature method with a geometric mapping are applied to study the free vibration of irregular plates. The obtained results agreed with the previous studies in the literature.

10p kethamoi1 17-11-2019 11 0   Download

In this paper, buckling behavior of aluminum cylindrical shell with rectangular cutout, subjected to axial pressure was studied by means of finite element simulations. The effects of geometric parameters (R, t, a, b and L) on the first buckling mode capacity of the shell were studied.

12p tohitohi 19-05-2020 4 0   Download

This work shows a free-body model for tolerance analysis, that uses the force free-body diagrams and the functional equations’ sensitivities, by simulating the geometrical tolerances together with the dimensional ones.

12p tohitohi 19-05-2020 1 0   Download

This paper deals with a geometrically nonlinear finite element formulation for the analysis of torsional behaviour of RC members. Using the corotational framework, the formulation is developed for the inclusion of nonlinear geometry effects in a multi-fiber finite element beam model. The assumption of small strains but large displacements and rotations is adopted. The principle is an element-independent algorithm, where the element formulation is computed in a local reference frame which is uncoupled from the rigid body motions (translations and rotations) of the reference frame.

15p kequaidan6 11-07-2020 3 0   Download

Orthogonal moments are used to represent digital images with minimum redundancy. Orthogonal moments with fractional-orders show better capabilities in digital image analysis than integer-order moments. In this work, the authors present new fractional-order shifted Gegenbauer polynomials. These new polynomials are used to define a novel set of orthogonal fractional-order shifted Gegenbauer moments (FrSGMs). The proposed method is applied in gray-scale image analysis and recognition.

10p dayhoctainha 10-09-2020 3 0   Download

Currently the combination of molecular tools, imaging techniques and analysis software offer the possibility of studying gene activity through the use of fluorescent reporters and infer its distribution within complex biological threedimensional structures.

13p vicolorado2711 22-10-2020 3 0   Download

Proteins play a special role in bioinformatics. The surface shape of a protein, which is an important characteristic of the protein, defines a geometric and biochemical domain where the protein interacts with other proteins. The similarity analysis among protein models has become an important topic of protein analysis, by which it can reveal the structure and the function of proteins.

10p vioklahoma2711 19-11-2020 3 0   Download