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Publications - 6374

State dependent anytime control methodology for prototypical aeroelastic wing section with structural non-linearity

Peter Varlaki L. Kiss Annamária R. Várkonyi-Kóczy Péter Baranyi

Publication Name: IEEE International Symposium on Industrial Electronics

Publication Date: 2003-01-01

Volume: I

Issue: Unknown

Page Range: 200-205

Description:

Nowadays in solving control problems the processing is performed typically by model-based computer systems, which contain a representation of our knowledge about the nature and the actual circumstances of the problem in hand. If the nature and/or the actual circumstances change the corresponding model should also be changed. Anytime techniques are very flexible in this respect and can advantageously be used when the operation should be performed under changing circumstances. In this paper, a nonlinear state dependent control methodology is proposed for anytime use and as an example is applied to globally stabilize a given prototypical aeroelastic wing section via one control surface.

Open Access: Yes

DOI: 10.1109/ISIE.2003.1267245

Lattice BGK simulation of multipolar vortex: Formation

Gábor Tóth Gábor Házi

Publication Name: Advances in Applied Mathematics and Mechanics

Publication Date: 2010-12-01

Volume: 2

Issue: 5

Page Range: 533-544

Description:

Analytical and numerical studies have shown that multipolar vortices can emerge in two-dimensional flow due to azimuthal normal mode perturbations of shielded vortices. It has been found that mode 2 and 3 perturbations can lead to the formation of stable tripoles and quadrapoles, respectively, while higher order modes result in more complex unstable compound vortices. We have used the lattice Boltzmann method to simulate the effect of azimuthal perturbations on shielded vortices at moderate Reynolds numbers. We have found that azimuthal normal mode perturbations result in the formation of multipoles, which decay due to viscous dissipation. We could also observe that the outcome of such simulations is very sensitive to the displacement of perturbations above wavenumber-3 excitations, in spite of the significant viscosity we used. © 2010 Global Science Press.

Open Access: Yes

DOI: 10.4208/aamm.10-10S01

The pedagogical Project of Education for Sustainable Development in 3D virtual space

Viktória Kövecses-Gősi

Publication Name: 10th IEEE International Conference on Cognitive Infocommunications Coginfocom 2019 Proceedings

Publication Date: 2019-10-01

Volume: Unknown

Issue: Unknown

Page Range: 539-544

Description:

Nowadays there is no day without some thought-provoking, shocking news about the global climate crisis. Although efforts to achieve environmental education and sustainable development have been present since the 1970s, today we see that an increasing emphasis is put on them not only in the scientific world but also in our daily lives. One of the biggest challenges nowadays is the effective implementation of sustainability education in the school system. In the process of this, the formation of environmentally conscious behavior of young people participating in education and the development of a sense of responsibility are central objectives. We have a guiding role in this during teacher training. It is necessary to equip prospective teachers for the most important activities of environmental education and to make them acquire the effective environmental education methods necessary for successful work. All this in a way that, in addition to direct nature experiences, we adjust to the needs and interests of the digital generation. The study presents a sustainability pedagogical project realized in teacher education by using 3D VR space.

Open Access: Yes

DOI: 10.1109/CogInfoCom47531.2019.9090000

Fuzzy rule extraction by bacterial memetic algorithms

János Botzheim Cristiano L. Cabrita António E. Ruano Laszlo T. Koczy

Publication Name: International Journal of Intelligent Systems

Publication Date: 2009-03-01

Volume: 24

Issue: 3

Page Range: 312-339

Description:

In our previous papers, fuzzy model identification methods were discussed. The bacterial evolutionary algorithm for extracting fuzzy rule base from a training set was presented. The Levenberg-Marquardt method was also proposed for determining membership functions in fuzzy systems. The combination of the evolutionary and the gradient-based learning techniques is usually called memetic algorithm. In this paper, a new kind of memetic algorithm, the bacterial memetic algorithm., is introduced for fuzzy rule extraction. The paper presents how the bacterial evolutionary algorithm can be improved with the Levenberg-Marquardt technique. © 2009 Wiley Periodicals, Inc.

Open Access: Yes

DOI: 10.1002/int.20338

Unveiling the Role of Edaphic Microalgae in Soil Carbon Sequestration: Potential for Agricultural Inoculants in Climate Change Mitigation

Györgyi Kovács Zoltán Molnár Jun Bin Zhao István Mihály Kulmány Wogene Kabato Zainulabdeen Khalaf Hashim Agampodi Gihan Shyamal Dharmendra De Silva Zainulabdeen Khalaf Hashim

Publication Name: Agriculture Switzerland

Publication Date: 2024-11-01

Volume: 14

Issue: 11

Page Range: Unknown

Description:

Agricultural soil has great potential to address climate change issues, particularly the rise in atmospheric CO2 levels. It offers effective remedies, such as increasing soil carbon content while lowering atmospheric carbon levels. The growing interest in inoculating soil with live microorganisms aims to enhance agricultural land carbon storage and sequestration capacity, modify degraded soil ecosystems, and sustain yields with fewer synthetic inputs. Agriculture has the potential to use soil microalgae as inoculants. However, the significance of these microorganisms in soil carbon sequestration and soil carbon stabilization under field conditions has yet to be fully understood. Large-scale commercial agriculture has focused on the development and use of inoculation products that promote plant growth, with a particular emphasis on enhancing yield attributes. Gaining more profound insights into soil microalgae’s role in soil carbon cycling is necessary to develop products that effectively support soil carbon sequestration and retention. This review comprehensively explores the direct and indirect mechanisms through which soil microalgae contribute to soil carbon sequestration, highlighting their potential as microbial inoculants in agricultural settings. This study underlines the need for more research to be conducted on microalgae inoculation into agricultural soil systems aimed at mitigating carbon emissions in the near future.

Open Access: Yes

DOI: 10.3390/agriculture14112065

The role of forestry sciences in combating climate change and advancing sustainable development goals

Lóránt Dávid Prema Nedungadi Raghu Raman Sudheesh Manalil

Publication Name: Frontiers in Forests and Global Change

Publication Date: 2024-01-01

Volume: 7

Issue: Unknown

Page Range: Unknown

Description:

Introduction: As ecological disasters loom, forests play a crucial role in mitigating climate change and aligning with the United Nations Sustainable Development Goals (SDGs). This study aims to systematically examine the contribution of forestry science research to the SDGs through a multidisciplinary perspective, highlighting its role in advancing global sustainability efforts. Methods: Utilizing the PRISMA protocol, we conducted a comprehensive analysis of 39,841 publications since 2015, focusing on the intersection of forestry sciences with the SDGs. Network and keyword co-occurrence analyses were performed to identify thematic clusters and interdisciplinary linkages among SDGs. Results: Our findings indicate a significant focus on SDG 15 (Life on Land) and SDG 13 (Climate Action), emphasizing the forestry sector’s contributions to biodiversity conservation, climate change mitigation, and ecosystem services. The analyses revealed thematic clusters centered around ecological sustainability, sustainable energy, and social development, demonstrating the diverse ways in which forestry research supports the SDGs. Discussion: This study highlights the interdisciplinary nature of forestry sciences and identifies key areas of contribution while pointing to potential research gaps. Future research should explore advanced technologies such as AI-driven analytics and remote sensing, socioeconomic impacts of forest-based livelihoods, and innovative reforestation techniques. Strengthening urban forestry, enhancing interdisciplinary cooperation, and improving governance are recommended to ensure continued contributions of forestry sciences to global sustainability and the SDGs.

Open Access: Yes

DOI: 10.3389/ffgc.2024.1409667

Review of DC Motor Modeling and Linear Control: Theory with Laboratory Tests

Miklós Kuczmann

Publication Name: Electronics Switzerland

Publication Date: 2024-06-01

Volume: 13

Issue: 11

Page Range: Unknown

Description:

This review paper introduces the modeling, measurement, identification and control of direct current motors based on the state space modeling and the transfer function representation. These models are identified by real laboratory measurements, and the simulated results are compared with the measurements. Continuous-time and discrete-time PID (Proportional-Integral-Derivative) controllers, discrete-time state feedback and linear quadratic controllers are designed mathematically. The designed controllers are realized by the microcontroller Arduino UNO, and the behavior of the controllers is compared and analyzed. The noisy current signal has been measured by a discrete-time observer, steady-state Kalman filtering is also studied. The practical results of the implemented controllers support the theoretical results very well.

Open Access: Yes

DOI: 10.3390/electronics13112225

State Space Model Based Control in Virtual Laboratory

Miklós Kuczmann Péter Baranyi

Publication Name: 10th IEEE International Conference on Cognitive Infocommunications Coginfocom 2019 Proceedings

Publication Date: 2019-10-01

Volume: Unknown

Issue: Unknown

Page Range: 507-510

Description:

Applying virtual laboratories in teaching can improve and complete university lectures. This paper presents four labs that allow engineering students to study and design a pole placement based controller for typical problems: inverted pendulum, Furuta pendulum, crane, ball and beam. The dynamics of the plants, instructions for controller design and test are provided on smartboards of the virtual laboratory. The controller performance can be studied by the model of the real-life application. The mathematical models and controller design are presented as well as the experiences in the virtual laboratory of control engineering.

Open Access: Yes

DOI: 10.1109/CogInfoCom47531.2019.9090003

Comprehensive method for the test calculation of complex digital circuits

Jozsef Sziray

Publication Name: Periodica Polytechnica Electrical Engineering

Publication Date: 1997-01-01

Volume: 41

Issue: 4

Page Range: 251-257

Description:

The paper presents a general test calculation principle which serves for producing tests for a wide range of possible faults: stuck-at-constant logic level (single, multiple), bridging (single), as well as behavioral (functional, single) faults. The proposed method handles multi-valued logic, where the number of logic values is unlimited. The level of circuit modeling is also allowed to vary in a wide range: switch level, gate level, functional level, etc. are equally allowed. Both combinational and sequential circuits are considered. The principle is comparatively simple, and it yields an opportunity to be realized by an efficient computer program.

Open Access: Yes

DOI: DOI not available