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Found 6278 publications

Computational complexity in logic testing

Jozsef Sziray

Publication Name: Ines 2010 14th International Conference on Intelligent Engineering Systems Proceedings

Publication Date: 2010-07-26

Volume: Unknown

Issue: Unknown

Page Range: 97-102

Description:

The paper is concerned with analyzing and comparing two exact algorithms from the viewpoint of computational complexity. Both are for calculating fault-detection tests for digital circuits. The first one is the so-called composite justification, and the second is the D-algorithm. The analysis will be performed on combinational logic networks at the gate level. Here single and multiple stuck-at logic faults will be considered. As a result, it is pointed out that the composite justification requires significantly less computational step than the D-algorithm and its modifications. From this fact it has been concluded that possibly no other algorithm is available in this field with fewer computational steps. If it holds, then it follows directly that the test calculation problem is of exponential-time, and so are any other NP-complete problems. © 2010 IEEE.

Open Access: Yes

DOI: 10.1109/INES.2010.5483865

Three step bacterial memetic algorithm

László Gál Rita Lovassy László T. Kóczy

Publication Name: Ines 2010 14th International Conference on Intelligent Engineering Systems Proceedings

Publication Date: 2010-07-26

Volume: Unknown

Issue: Unknown

Page Range: 31-36

Description:

In order to study the function approximation performance of Fuzzy Neural Networks built up from fuzzy J-K flip-flop neurons a new learning algorithm, the Three Step Bacterial Memetic Algorithm is proposed. Hybrid evolutionary methods that combine genetic type algorithms with "classic" local search have been applied to perform efficient global search. This novel version of the Bacterial Memetic Algorithm with Modified Operator Execution Order (BMAM) is a recently developed technique of hybrid type. This particular merger of evolutionary and gradient based algorithms combining both global and local search consists of bacterial mutation and, as a second step, the Levenberg-Marquardt (LM) method applied for each clone. This LM step saves in this way some potential solutions that could be lost otherwise after each mutation step. As a third step the LM algorithm is recalled for a few iterations for each individual of the population towards reaching the local optimum. In our novel algorithm various kinds of fast algorithm with less complexity, like Quasi-Newton algorithm, Conjugate Gradient algorithm, and two Backpropagation training algorithms: Gradient Descent and Gradient Descent with Adaptive Learning Rate and Momentum are nested in the bacterial mutation. © 2010 IEEE.

Open Access: Yes

DOI: 10.1109/INES.2010.5483817

A solution method for solving I/O and O/D tables

András Bakó Peter Foldesi István Szuts

Publication Name: Ines 2010 14th International Conference on Intelligent Engineering Systems Proceedings

Publication Date: 2010-07-26

Volume: Unknown

Issue: Unknown

Page Range: 195-198

Description:

The Origin-Destination (O/D) matrix is intensively used in long term traffic network planning. The matrix is used for forecasting the future traffic between the sections and for distributing the traffic. Several methods are known as a solution for this problem. In this paper it is shown that all these methods can be solved by the RAS algorithm. Furthermore we present the Input-Output table problem which also can be solved by this RAS method. © 2010 IEEE.

Open Access: Yes

DOI: 10.1109/INES.2010.5483850

Approximation of force and energy in vehicle crash using LPV type description

No authors available

Publication Name: WSEAS Transactions on Systems

Publication Date: 2010-07-01

Volume: 9

Issue: 7

Page Range: 734-743

Description:

In accident analysis, vehicle crash mechanics and vehicle safety research modeling of the deformational force and absorbed energy plays a crucial role. The usually applied FEM based methods give good approximations, but they have extremely large computational complexity and require a detailed knowledge about the parameteres of the crash and the vehicle. There are simpler models, but they not give satisfactory approximation. In this paper using the LPV-HOSVD paradigm we introduce a model for vehicle deformation process, which well approximates the deformation force and the absorbed energy, moreover it has acceptable computational complexity.

Open Access: No

DOI: DOI not available

Approximation of force and energy in vehicle crash using LPV type description

István Harmati András Rövid Peter Varlaki

Publication Name: Wseas Transactions on Systems

Publication Date: 2010-07-01

Volume: 9

Issue: 7

Page Range: 734-743

Description:

In accident analysis, vehicle crash mechanics and vehicle safety research modeling of the deformational force and absorbed energy plays a crucial role. The usually applied FEM based methods give good approximations, but they have extremely large computational complexity and require a detailed knowledge about the parameteres of the crash and the vehicle. There are simpler models, but they not give satisfactory approximation. In this paper using the LPV-HOSVD paradigm we introduce a model for vehicle deformation process, which well approximates the deformation force and the absorbed energy, moreover it has acceptable computational complexity.

Open Access: Yes

DOI: DOI not available

European round of manfred lachs space law moot court competition, 29-30 April 2010, Gyor

Mónika Ganczer

Publication Name: Acta Juridica Hungarica

Publication Date: 2010-06-01

Volume: 51

Issue: 2

Page Range: 157-161

Description:

No description provided

Open Access: Yes

DOI: 10.1556/AJur.51.2010.2.6

Historical origin of the fine structure constant subtilis structurae constan unit s1 part i. St. Stephen's crowning achievement

Peter Varlaki László T. Kóczy Imre J. Rudas

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2010-05-31

Volume: 7

Issue: 1

Page Range: 119-157

Description:

This paper deals with the historical origin of the primordial image of the fine structure constant (FSC) and the number 137 as the Self's own number archetype, which plays a central role in the poetic-hermeneutic system of the Holy Crown of Hungary. We intend to show that the allegorical and symbolical images which are observed as the manifestation of unconscious and interpreted and analyzed in the Pauli-Jung collaboration have a lengthy synchronistic relationship with the "archetypal model" of the FSC found in the marvellous enamel pictures of St. Stephen's Crown.

Open Access: Yes

DOI: DOI not available

Historical origin of the fine structure constant subtilis structurae constan unit s1 part i. St. Stephen's crowning achievement

No authors available

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2010-05-31

Volume: 7

Issue: 1

Page Range: 119-157

Description:

This paper deals with the historical origin of the primordial image of the fine structure constant (FSC) and the number 137 as the Self's own number archetype, which plays a central role in the poetic-hermeneutic system of the Holy Crown of Hungary. We intend to show that the allegorical and symbolical images which are observed as the manifestation of unconscious and interpreted and analyzed in the Pauli-Jung collaboration have a lengthy synchronistic relationship with the "archetypal model" of the FSC found in the marvellous enamel pictures of St. Stephen's Crown.

Open Access: No

DOI: DOI not available

Lattice boltzmann simulation of two-dimensional wall bounded turbulent flow

Gábor Tóth Gábor Házi

Publication Name: International Journal of Modern Physics C

Publication Date: 2010-05-01

Volume: 21

Issue: 5

Page Range: 669-680

Description:

This paper reports on a numerical study of two-dimensional decaying turbulence in a square domain with no-slip walls. The generation of strong small-scale vortices near the no-slip walls have been observed in the lattice Boltzmann simulations just like in earlier pseudospectral calculations. Due to these vortices the enstrophy is not a monotone decaying function of time. Considering a number of simulations and taking their ensemble average, we have found that the decay of enstrophy and that of the kinetic energy can be described well by power-laws. The exponents of these laws depend on the Reynolds number in a similar manner than was observed before in pseudospectral simulations. Considering the ensemble averaged 1D Fourier energy spectra calculated along the walls, we could not find a simple power-law, which fits well to the simulation data. These spectra change in time and reveal an exponent close to -3 in the intermediate and an exponent -5/3 at low wavenumbers. On the other hand, the two-dimensional energy spectra, which remain almost steady in the intermediate decay stage, show clear power-law behavior with exponent larger than -3 depending on the initial Reynolds number. © 2010 World Scientific Publishing Company.

Open Access: Yes

DOI: 10.1142/S0129183110015403