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Confined systems through variational supersymmetric quantum mechanics
(2003-12-01)
The energy states of the confined harmonic oscillator and the Hulthén potentials are evaluated using the Variational Method associated to Supersymmetric Quantum Mechanics.
Eigenvalue analyses of two parallel lines using a single real transformation matrix
(2005-10-31)
For a typical non-symmetrical system with two parallel three phase transmission lines, modal transformation is applied using some examples of single real transformation matrices. These examples are applied searching an ...
Local dimension and finite time prediction in coupled map lattices
(2005-03-01)
Forecasting, for obvious reasons, often become the most important goal to be achieved. For spatially extended systems (e.g. atmospheric system) where the local nonlinearities lead to the most unpredictable chaotic evolution, ...
Non-transposed three-phase line analyses with a single real transformation matrix
(2005-10-31)
In transmission line transient analyses, a single real transformation matrix can obtain exact modes when the analyzed line is transposed. For non-transposed lines, the results are not exact. In this paper, non-symmetrical ...
Eigenvalue analyses for non-transposed three-phase transmission line considering non-implicit ground wires
(2012-12-11)
This paper presents a method for analyzing electromagnetic transients using real transformation matrices in three-phase systems considering the presence of ground wires. So, for the Z and Y matrices that represent the ...
Correction procedure applied to a single real transformation matrix -Untransposed three-phase transmission line cases
(2006-12-01)
Clarke's matrix has been used as an eigenvector matrix for transposed three-phase transmission lines and it can be applied as a phase-mode transformation matrix for transposed cases. Considering untransposed three-phase ...
Modal transformation obtained from Clarke's matrix - Asymmetrical three-phase case
(2007-12-01)
Some constant matrices can be used as phase-mode transformation matrices for transposed three-phase transmission lines. Clarke's matrix is one of these options. Its application as a phase-mode transformation matrix for ...
Modal representation of three-phase lines applying two transformation matrices: Evaluation of its eigenvectors
(2006-12-01)
The objective of this paper is to show an alternative representation in time domain of a non-transposed three-phase transmission line decomposed in its exact modes by using two transformation matrices. The first matrix is ...
Vibrational ground state energy for confined molecules
(2019-04-24)
The ground state vibrational energies for three confined diatomic molecules (nitrogen, lithium and NaH) are determined by using the variational method. The approach proposed allows us to build trial eigenfunctions based ...
Nonperturbative approach to potentials in impenetrable boxes based on quasi-exact solvability
(2003-12-01)
In this work we develop an approach to obtain analytical expressions for potentials in an impenetrable box. In this kind of system the expression has the advantage of being valid for arbitrary values of the box length, and ...