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Found 6412 publications

Relationships between Shear Strength Parameters with Mineralogy and Index Properties of Compacted, Unsaturated Soils

Elizabeth Theron Sai K. Vanapalli Armand Augustin Fondjo Richard P. Ray

Publication Name: Studia Geotechnica Et Mechanica

Publication Date: 2025-03-01

Volume: 47

Issue: 1

Page Range: 65-88

Description:

The objective of this study is to assess the influences of soil index properties, swelling parameters, and soil mineralogy on unsaturated shear strength parameters (φ', φb, c') of compacted expansive soils. The laboratory tests include the grain size distribution, specific gravity (Gs), Atterberg limits, swelling potential, X-ray diffraction, modified Proctor compaction, soil suction, and triaxial testing. MINITAB 19 statistical analysis software generates the tri-dimensional surface graphs. The values φ', φb, and c"are majorly influenced by water (%), Gs, and clay (%). φ"shows a strong correlation with free swell ratio (FSR), free swell index (FSI), and void ratio. φb demonstrates a strong relationship with liquid limit, plasticity index, and γd (dry unit weight). φ"and c"portray a moderate relationship with liquid limit, plasticity limit, and γd. φ"exhibits a moderate correlation with smectite (%) and plagioclase (%). φb describes a strong relationship with smectite (%) and a moderate correlation with plagioclase and K-feldspar (%). c"depicts a moderate correlation with smectite (%), K-feldspar (%), and plagioclase (%). The matric suction controls the behaviour of unsaturated soils. Nonetheless, the influences of soil index properties, swelling potential, and mineralogy on shear strength are not marginal. These findings provide a good insight into the behaviour of unsaturated expansive soils and contribute to enhancing geotechnical modelling.

Open Access: Yes

DOI: 10.2478/sgem-2025-0006

Implementation of a basic flow model in traffic controlling

Sándor Gacsal Timót Hidvégi

Publication Name: 9th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics Cinti 2008

Publication Date: 2008-12-01

Volume: Unknown

Issue: Unknown

Page Range: 523-530

Description:

The contribution introduces a basic model, a manner, how to control - using the specific tools - A crossing of a highway and a lower volume road, while we stop the highway's traffic only in a critical case otherwise just slow it down.

Open Access: Yes

DOI: DOI not available

Accuracy of the robust design analysis for the flux barrier modelling of an interior permanent magnet synchronous motor

Miklós Kuczmann Mihaly Katona Tamas Orosz

Publication Name: Journal of Computational and Applied Mathematics

Publication Date: 2023-09-01

Volume: 429

Issue: Unknown

Page Range: Unknown

Description:

Mass-produced electrical machines are subjected to manufacturing uncertainties in terms of geometry. A robust design is inevitable to ensure the consistent performance of the electric motor. Some parts of the rotor geometry are often simplified, like the flux barrier at the end of the magnets. This paper presents a design optimisation regarding the torque ripple and the average torque. The aim is to assess the effects of the flux barrier on the main properties of a permanent magnet synchronous motor. Also, robust design analysis is presented on the flux barrier. The computational burden of the robust design analysis is immense, even if uniform uncertainties are assumed. In this case, different Design of Experiment (DoE) methods reduce the number of simulations. The efficiency of the DoE methods is compared in terms of simulation number and extreme value approximation. We found that the Central Composite method is the most accurate, while the Plackett–Burman is the most efficient in this particular case.

Open Access: Yes

DOI: 10.1016/j.cam.2023.115228

Experimental result on supersonic flow simulation on emulated digital CNN-UM

Sándor Kocsárdi Zoltán Nagy Árpád Csík Péter Szolgay

Publication Name: Proceedings of the IEEE International Workshop on Cellular Neural Networks and their Applications

Publication Date: 2008-09-23

Volume: Unknown

Issue: Unknown

Page Range: 5

Description:

In the area of mechanical, aerospace, chemical and civil engineering the solution of partial differential equations (PDEs) has been one of the most important problems of mathematics for a long time. In this field, one of the most exciting areas is the simulation of fluid flow, which involves for example problems of air, sea and land vehicle motion. ©2008 IEEE.

Open Access: Yes

DOI: 10.1109/CNNA.2008.4588636

Number archetypes and "background" control theory concerning the fine structure constant

Peter Varlaki László Nádai József Bokor

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2008-12-01

Volume: 5

Issue: 2

Page Range: 71-104

Description:

In this paper we analyze in detail the central role of number '137', the so-called Fine Structure Constant in the collaboration of Pauli and Jung. First, we present the fascination or the obsession of Pauli for the interpretation of number '137'. Second, we treat the spontaneous messages originating from unconscious concerning number '137' in the wellknown dreams of Pauli. We restrict our investigations to the dreams containing the especially important formulae of Fine Structure Constant (4π3 + π2 + π), and also that containing the so-called background models of mathematical control systems. Third, we shortly mention four of the numerous synchronicities arising during the Pauli-Jung collaboration.

Open Access: Yes

DOI: DOI not available

Improvements to the bacterial memetic algorithm used for fuzzy rule base extraction

János Botzheim László Gál Laszlo T. Koczy

Publication Name: Cimsa 2008 IEEE Conference on Computational Intelligence for Measurement Systems and Applications Proceedings

Publication Date: 2008-09-26

Volume: Unknown

Issue: Unknown

Page Range: 38-43

Description:

In this paper we discuss new methods to improve the Bacterial Memetic Algorithm (BMA) used for fuzzy rule base extraction. The first two methods are knot order violation handling methods which improves the performance of the BMA rather in the case of more complex fuzzy rule base. The third method is a new modification of the BMA in which the order of the operators is modified. This method improves the performance of the BMA rather in the case of less complex fuzzy rule base. ©2008 IEEE.

Open Access: Yes

DOI: 10.1109/CIMSA.2008.4595829

Temporal dynamics of object location processing in allocentric reference frame

Peter Galambos György Persa Andrea Kóbor Ágoston Török Ferenc Honbolygó Valéria Csépe Peter Baranyi

Publication Name: Psychophysiology

Publication Date: 2017-09-01

Volume: 54

Issue: 9

Page Range: 1346-1358

Description:

The spatial location of objects is processed in egocentric and allocentric reference frames, the early temporal dynamics of which have remained relatively unexplored. Previous experiments focused on ERP components related only to egocentric navigation. Thus, we designed a virtual reality experiment to see whether allocentric reference frame-related ERP modulations can also be registered. Participants collected reward objects at the end of the west and east alleys of a cross maze, and their ERPs to the feedback objects were measured. Participants made turn choices from either the south or the north alley randomly in each trial. In this way, we were able to discern place and response coding of object location. Behavioral results indicated a strong preference for using the allocentric reference frame and a preference for choosing the rewarded place in the next trial, suggesting that participants developed probabilistic expectations between places and rewards. We also found that the amplitude of the P1 was sensitive to the allocentric place of the reward object, independent of its value. We did not find evidence for egocentric response learning. These results show that early ERPs are sensitive to the location of objects during navigation in an allocentric reference frame.

Open Access: Yes

DOI: 10.1111/psyp.12886

Mapping municipal debt risks: A spatiotemporal analysis of China's prefecture-level cities

Laszlo Vasa Irum Shahzadi Bing Zeng Dariusz Cichon Irum Shahzadi Ling Wei

Publication Name: International Review of Economics and Finance

Publication Date: 2026-03-01

Volume: 106

Issue: Unknown

Page Range: Unknown

Description:

Addressing the risks associated with local government debt is crucial for economic development and fiscal security. This paper analyzes the spatiotemporal distribution of municipal government debt risks using panel data from 271 prefecture-level cities in China from 2015 to 2021, employing Exploratory Spatial Data Analysis (ESDA) and the Spatial Durbin Model. The prime objective of this research is to analyze the spatiotemporal distribution of municipal government debt in different regions of China, including the central, western, eastern regions. Key findings include: (1) Local government debt risk exhibits a fluctuating upward trend characterized by significant regional, administrative, and debt-type disparities. (2) Risk levels in central and western regions have increased, while major urban agglomerations have maintained medium or lower risk levels. (3) Local government debt risk demonstrates significant global spatial correlation, with low-low (LL) agglomerations evolving from multi-centered to dual-centered distributions. (4) Notably, a 1 % increase in neighboring debt risk leads to a 0.2467 % rise in local debt risk. (5) Fiscal pressure, urbanization rates, and economic scale are primary drivers of local government debt risk, whereas industrial structure, land transfer income, and financial development serve to mitigate it. These findings underscore the intra-regional and inter-regional heterogeneity and geographical differences, providing valuable insights for managing municipal government debt risk.

Open Access: Yes

DOI: 10.1016/j.iref.2025.104849

Entropy based fuzzy classification and detection aid for colorectal polyps

Ferenc Lilik Laszlo T. Koczy Szilvia Nagy

Publication Name: 2017 IEEE AFRICON Science Technology and Innovation for Africa AFRICON 2017

Publication Date: 2017-11-03

Volume: Unknown

Issue: Unknown

Page Range: 78-82

Description:

Colorectal polyps affect a large percentage of the population all over the world, and they can be a basis for more serious conditions such as cancers. As the most reliable method for detecting a polyp in the lower bowel tract is colonoscopy, more and more image processing experiments appear that help to find or characterize such a lesion. The social benefit of such methods is clear, any aid in detecting pre-cancer states saves lives. In the present considerations a fuzzy decision method for finding polyps on a colonoscopy image is presented. As a first step, the image taken during the colonoscopy is cut into tiles of size N by N, thus a rough localization of the lesion within the picture is also possible. The antecedent dimensions consist of statistical characteristics of the colour channels of the tiles, their Renyi entropies, edge density and fitted polynomial coefficients. The method's dependence on the tile-size within the images are also studied, and the success rate increases with the decrease of the tile size between 70 by 70 and 20 by 20 tile sizes.

Open Access: Yes

DOI: 10.1109/AFRCON.2017.8095459