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Found 6374 publications

Reconstruction of accidents involving commercial vehicles rollover

No authors available

Publication Name: European Automobile Engineers Cooperation - 10th EAEC European Automotive Congress, EAEC 2005

Publication Date: 2005-12-01

Volume: 3

Issue:

Page Range: 1056-1069

Description:

Open Access: No

DOI: DOI not available

Detection of radially localized and poloidally symmetric structures in the poloidal flow of tokamak plasmas

No authors available

Publication Name: 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts

Publication Date: 2005-12-01

Volume: 3

Issue:

Page Range: 1994-1997

Description:

Open Access: No

DOI: DOI not available

Cognitive psychological structure of education and research in geotechnics

No authors available

Publication Name: Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering: Geotechnology in Harmony with the Global Environment

Publication Date: 2005-12-01

Volume: 4

Issue:

Page Range: 2859-2862

Description:

Post secondary education provides an introduction to models, and develops model selection and application skills. Recent developments in cognitive psychology offer good possibilities for differentiating between levels of knowledge. It is prudent to define four levels of preparation in the technical-engineering professions, particularly in their relationship to models. As a conclusion, it turns out that professional geotechnicians are required to have MSc level of competency. The approach also yields answers to some debated questions of modelling and solving geotechnical problems in the framework of engineering mechanics.

Open Access: No

DOI: DOI not available

Evaluation of HRTF data using the head-Related Transfer Function Differences

No authors available

Publication Name: Forum Acusticum Budapest 2005: 4th European Congress on Acustics

Publication Date: 2005-12-01

Volume:

Issue:

Page Range: 2475-2479

Description:

A simple spectral computation method is introduced for the evaluation of differences in dummy-head Head-Related Transfer Functions (HRTFs). These transfer functions describe the directional-dependent filtering of the outer ears and are responsible for basic localization cues. Head-Related Transfer Function Differences (HRTFDs) are defined as the quotient of measured HRTFs in the same direction, comparing the cases of modified environmental conditions. The HRTFDs are relative measures and thus free from systematic errors of the measurement system and individual parameters. Our experience shows that HRTFDs are well suited to analyze the fine structure of measured HRTF data and for representation of the changes in the acoustical environment near or on the head. HRTFDs of a BK dummy-head will be shown representing differences from about 1 dB. This measurement accuracy was determined by replacing the dummy-head with an omnidirectional microphone.

Open Access: No

DOI: DOI not available

Environmental influence on the fine structure of dummy-head HRTFs

No authors available

Publication Name: Forum Acusticum Budapest 2005: 4th European Congress on Acustics

Publication Date: 2005-12-01

Volume:

Issue:

Page Range: 2529-2534

Description:

The directional filtering of the outer ears is a significant step during the evaluation of spatial information. A computer-controlled dummy-head measurement system was developed to measure the HRTFs in huge amount and with increased spatial resolution. Effects and common properties of objects near the head (glasses, hair, baseball cap) were measured. Changes in the HRTFs due to the acoustical environment will be presented as function of frequency and azimuth for different elevations on 2D polar diagrams. Differences of about 1 dB are evaluated in the fine structure of the measured HRTFs and conclusions are drawn for the relevance of HRTF reproduction in binaural synthesis.

Open Access: No

DOI: DOI not available

An hybrid training method for B-spline neural networks

No authors available

Publication Name: 2005 IEEE International Workshop on Intelligent Signal Processing - Proceedings

Publication Date: 2005-12-01

Volume:

Issue:

Page Range: 165-170

Description:

Current and past research has brought up new views related to the optimization of neural networks. For a fixed structure, second order methods are seen as the most promising. From previous works we have shown how second order methods are of easy applicability to a neural network. Namely, we have proved how the Levenberg-Marquard possesses not only better convergence but how it can assure the convergence to a local minima. However, as any gradient-based method, the results obtained depend on the startup point. In this work, a reformulated Evolutionary algorithm - the Bacterial Programming for Levenberg-Marquardt is proposed, as an heuristic which can be used to determine the most suitable starting points, therefore achieving, in most cases, the global optimum. © 2005 IEEE.

Open Access: No

DOI: DOI not available

The two distinct systems of socialist Albania and SFR Yugoslavia: A comparative analysis using Kornai's 'Main Line of Causality'

Eszter Kazinczy

Publication Name: History of Economic Thought and Policy

Publication Date: 2021-01-01

Volume: Unknown

Issue: 2

Page Range: 31-51

Description:

This paper compares two peculiar country cases within the former European socialist bloc: Albania and the Socialist Federal Republic of Yugoslavia. Based on János Kornai's 'main line of causality', we compare the two countries' main characteristics from the end of the Second World War until the fall of their socialist regimes. The goal of the paper is to demonstrate that the two neighbouring countries had similar political and economic intentions following the Second World War; yet despite this fact the analysed countries' development paths gradually diverged. As a result, the two systems differed fundamentally by the 1970s. Analysing the timeperiod in question is crucial to understand Albania's and the successor Yugoslav states' subsequent economic development.

Open Access: Yes

DOI: 10.3280/SPE2021-002002

Numerical investigation of heat transfer in air cooled permanent magnet electrical machines

Lotfi Abdelhakim

Publication Name: Aip Conference Proceedings

Publication Date: 2015-03-10

Volume: 1648

Issue: Unknown

Page Range: Unknown

Description:

The aim of this study is to present a magneto-thermal analysis of an external-rotor permanent magnet synchronous machine based on finite element method. The developed model can be used to predict temperature distribution inside the studied motor during the rated operation. Electromagnetic computation is carried out with the aid of two 2D finite-element (FE) simulations on the cross-section of the PM motor. In addition, the magnetic core losses of the stator and rotor are modelled based on the results from the electromagnetic analysis and a post-processing formula based on the loss-separation principle. After the loss calculation, the temperatures of the machine are calculated by using 3D finite element method. The results obtained by the model are compared with experimental results from testing the prototype electric motor.

Open Access: Yes

DOI: 10.1063/1.4913164

Extension of the Multi-TP Model Transformation to Functions with Different Numbers of Variables

Péter Baranyi

Publication Name: Complexity

Publication Date: 2018-01-01

Volume: 2018

Issue: Unknown

Page Range: Unknown

Description:

The tensor product (TP) model transformation defines and numerically reconstructs the Higher-Order Singular Value Decomposition (HOSVD) of functions. It plays the same role with respect to functions as HOSVD does for tensors (and SVD for matrices). The need for certain advantageous features, such as rank/complexity reduction, trade-offs between complexity and accuracy, and a manipulation power representative of the TP form, has motivated novel concepts in TS fuzzy model based modelling and control. The latest extensions of the TP model transformation, called the multi- and generalised TP model transformations, are applicable to a set functions where the dimensionality of the outputs of the functions may differ, but there is a strict limitation on the dimensionality of their inputs, which must be the same. The paper proposes an extended version that is applicable to a set of functions where both the input and output dimensionalities of the functions may differ. This makes it possible to transform complete multicomponent systems to TS fuzzy models along with the above-mentioned advantages.

Open Access: Yes

DOI: 10.1155/2018/8546976