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Found 6374 publications

Linear Quadratic Robust Control of Synchronous Reluctance Motor †

Zoltan Nemeth Dávid Gábor Bányai

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

Synchronous reluctance motors (SynRMs) play a key role in modern vehicles as they do not require permanent magnets and sliding brushes, reducing maintenance requirements and increasing reliability. My research focused on the development of robust torque control for SynRM. In the simulations, I compared the linear quadratic (LQ) controller with the conventional proportional–integral (PI) controller. To apply the LQ control method, I converted the nonlinear motor model into a linear one. We expect the results of this research to show that the LQ controller provides faster and more robust performance than the PI controller. LQ control can provide faster response times and a more stable operation, which are particularly important under dynamic vehicle operating conditions. Although LQ control is more computationally intensive and takes longer to fine tune, the results show that it results in a better and more stable control system. Such benefits are significant in dynamic vehicle operating conditions where fast and reliable torque control is essential. Overall, it can be concluded that advanced control techniques such as LQ can contribute to increasing the efficiency and performance of synchronous reluctance motors in the automotive industry, thus contributing to the development of sustainable and reliable vehicles.

Open Access: Yes

DOI: 10.3390/engproc2024079003

Same Goal, Different Paths – Sustainability in Hungarian Cultural Heritage Protection

Viktória Verebélyi

Publication Name: Rechtskultur

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: 659-670

Description:

This study explores the requirement of sustainability in cultural heritage protection from the perspective of constitutionality. Following an indispensable overview of certain concepts relating to its subject it discusses the constitutional framework of legislation on cultural heritage protection. Through an analysis of the applicable legal regulations, it examines the way the Hungarian State can enforce the requirement of sustainability in the specific field of cultural heritage protection. This is, indeed a topical subject, particularly in view of the Act on the Sustainable Development of Certain Elements of Cultural Heritage (hereinafter: “Castles Act”) which was adopted by the Hungarian National Assembly on 12 December 2023, but was not promulgated pursuant to Decision 5/2024. (II. 6.) of Constitutional Court. Ensuring sustainability is, according to the explanatory memorandum attached to the Castles Act is one of the key aspect of the regulation, just like in the case of the act regulating the returning of cultural objects of disputed ownership, kept in public collections.

Open Access: Yes

DOI: 10.36213/01-25

INVESTIGATING THE GLOBAL WARMING POTENTIAL OF ROOF STRUCTURES USING PARAMETRIC BIM METHOD

Kitti Karolyfi Dóra Szalai

Publication Name: Iet Conference Proceedings

Publication Date: 2024-01-01

Volume: 2024

Issue: 8

Page Range: 89-94

Description:

The sustainability of buildings is becoming increasingly important in today's world. Ever stricter environmental regulations encourage designers to select appropriate materials and products by examining multiple alternative solutions. This article presents an analysis of the global warming potential (GWP) of the roof structure of a residential building depending on the roof shape and angle. Three different roof types (flat roof, gable roof, and shed roof) were examined with the application of commonly used composite structures. The applied range of roof angles was between 20ºand 45ºin 5-degree increments for the gable and shed roofs, while 0ºwas used for the flat roof. The analysis was conducted using the Archicad-Grasshopper live connection, which enabled rapid examination of the GWP by dynamically tracking changes in geometry and roof angle. According to the results, the roof shape constructed with a steel beam slab and a gable roof made of solid wood had the smallest environmental impact in terms of the first phase of the life cycle.

Open Access: Yes

DOI: 10.1049/icp.2024.2687

On the Convergence of Input-Output Fuzzy Cognitive Maps

Istvan A. Harmati Laszlo T. Koczy

Publication Name: Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics

Publication Date: 2020-01-01

Volume: 12179 LNAI

Issue: Unknown

Page Range: 449-461

Description:

Fuzzy cognitive maps are recurrent neural networks, where the neurons have a well-defined meaning. In certain models, some neurons receive outer input, while other neurons produce the output of the system. According to this observation, some neurons are categorized as input neurons and the others are the state neurons and output neurons. The output of the system is provided as a limit of an iteration process, which may converge to an equilibrium point, but limit cycles or chaotic behaviour may also show up. In this paper, we examine the existence and uniqueness of fixed points for two types of input-output fuzzy cognitive maps. Moreover, we use network-based measures like in-degree, out-degree and connectivity, to express conditions for the convergence of the iteration process.

Open Access: Yes

DOI: 10.1007/978-3-030-52705-1_33

Cooperation of the Visegrad Group Countries in Disaster Management

Nikoletta Preisinger

Publication Name: International Scientific Business Conference Limen Leadership Innovation Management and Economics Integrated Politics of Research

Publication Date: 2024-01-01

Volume: 2024

Issue: Unknown

Page Range: Unknown

Description:

The study focuses on the Visegrad Four countries, which form the core of Central Europe. The V4 countries share certain common characteristics that naturally lead them to cooperate. They have the unique potential to be more than just a formal cooperation of four states with shared values and similar histories. Environmental issues are, by their very nature non-local, so they transcend the territory of a single country and affect large regions, often on a global scale. The alliance of the four states that make up the Visegrad Group allows them to coordinate their actions within the EU and NATO. This study aims to map and analyse the environmental situation of the V4 countries and their management of disaster situations, paying attention to the cooperation, or lack of it, that applies in disaster situations between the V4 countries.

Open Access: Yes

DOI: 10.31410/LIMEN.2024.379

Choices Based on the Self-Perception of University Applicants in their Decisions on Applying to Higher Education

Eszter Lukács Attila Miklós

Publication Name: Decision Making Applications in Management and Engineering

Publication Date: 2024-01-01

Volume: 7

Issue: 1

Page Range: 603-623

Description:

This paper investigates the role of self-concept and perceptions of academic performance in shaping university students’ choice of educational institutions, as well as the factors that influence these decisions. Various empirical studies have examined this topic, identified key determinants and reflected the aspects and expectations that students prioritize when making decisions about their academic future. In this study, we utilized scientific databases to filter through thousands of papers, ultimately selecting 225 articles that were directly related to decision-making processes in education. Out of these, we have cited 60 publications that offer significant insights relevant to our research. Moreover, we identified 20 empirical studies that specifically analyse the factors that influence students’ decision-making processes, based on data gathered through questionnaires and interviews. To further explore students' career aspirations and understand the factors influencing their choices, we focus on several key variables. These include students' self-perception, self-confidence, and personal development. We also assess how external factors, such as socioeconomic conditions, family expectations, and educational environment, may impact these decisions. By examining these elements, we aim to uncover how such influences contribute to students' educational and professional trajectories. This study seeks to clarify how diverse influences, particularly those experienced during adolescence, shape individuals’ personal growth and career pathways. In addition, it aims to identify any gaps in existing research, especially with regard to international practices and trends, thereby contributing to the broader understanding of student decision-making in higher education.

Open Access: Yes

DOI: 10.31181/dmame7120241274

A Novel Evaluation Framework for Medical LLMs: Combining Fuzzy Logic and MCDM for Medical Relation and Clinical Concept Extraction

Salman Yussof Iman Mohamad Sharaf Dragan Pamucar A. S. Albahri O. S. Albahri Omar Zughoul A. H. Alamoodi Salem Garfan Dianese David

Publication Name: Journal of Medical Systems

Publication Date: 2024-12-01

Volume: 48

Issue: 1

Page Range: Unknown

Description:

Artificial intelligence (AI) has become a crucial element of modern technology, especially in the healthcare sector, which is apparent given the continuous development of large language models (LLMs), which are utilized in various domains, including medical beings. However, when it comes to using these LLMs for the medical domain, there’s a need for an evaluation platform to determine their suitability and drive future development efforts. Towards that end, this study aims to address this concern by developing a comprehensive Multi-Criteria Decision Making (MCDM) approach that is specifically designed to evaluate medical LLMs. The success of AI, particularly LLMs, in the healthcare domain, depends on their efficacy, safety, and ethical compliance. Therefore, it is essential to have a robust evaluation framework for their integration into medical contexts. This study proposes using the Fuzzy-Weighted Zero-InConsistency (FWZIC) method extended to p, q-quasirung orthopair fuzzy set (p, q-QROFS) for weighing evaluation criteria. This extension enables the handling of uncertainties inherent in medical decision-making processes. The approach accommodates the imprecise and multifaceted nature of real-world medical data and criteria by incorporating fuzzy logic principles. The MultiAtributive Ideal-Real Comparative Analysis (MAIRCA) method is employed for the assessment of medical LLMs utilized in the case study of this research. The results of this research revealed that “Medical Relation Extraction” criteria with its sub-levels had more importance with (0.504) than “Clinical Concept Extraction” with (0.495). For the LLMs evaluated, out of 6 alternatives, (A4) “GatorTron S 10B” had the 1st rank as compared to (A1) “GatorTron 90B” had the 6th rank. The implications of this study extend beyond academic discourse, directly impacting healthcare practices and patient outcomes. The proposed framework can help healthcare professionals make more informed decisions regarding the adoption and utilization of LLMs in medical settings.

Open Access: Yes

DOI: 10.1007/s10916-024-02090-y

Behavioral Analysis of Fuzzy Cognitive Maps

Miklós F. Hatwágner

Publication Name: Studies in Fuzziness and Soft Computing

Publication Date: 2024-01-01

Volume: 427

Issue: Unknown

Page Range: 81-93

Description:

In this Chapter, we will discuss two further case studies, namely, problems that were proposed by a French bank. Our team was involved by the request of a French university, and we started to collaborate with their respective team, experts in management topics. The bank put up several models, but unfortunately the real-world equivalent of most models, the modeled system, remained unknown to us because of trade secrets. This made it difficult or impossible to determine the correctness of the models and fine-tune their settings in order to make their behavior more similar to reality. There was only one exception regarding the management system of the bank. The concepts of it were identified by themselves and the French specialist team, and experts have estimated the mutual influence strengths and directions of these components on each other. Models created this way unavoidably contain more or less subjective elements, but even if the models had been produced by machine learning, their thorough investigation is recommended before usage. Sometimes a subtle modification of connection weights or a different λ parameter in the threshold function can result in a model that behaves significantly different. This chapter describes a method to automatically investigate a model and detect if some of its components affect its dynamic behavior significantly. Two models were selected from those developed by the bank to illustrate the method and the results obtained with it.

Open Access: Yes

DOI: 10.1007/978-3-031-37959-8_7

NEW FAUNISTIC AND TAXONOMIC DATA ON ORIBATID MITES (ACARI: ORIBATIDA) OF THAILAND

Sergey G. Ermilov Jenő Kontschán Alexander A. Khaustov

Publication Name: Acta Zoologica Academiae Scientiarum Hungaricae

Publication Date: 2023-01-01

Volume: 69

Issue: 2

Page Range: 93-116

Description:

This study is based on oribatid mite materials collected from the vicinities of Phatthaya city and the Samet Island in Thailand; 18 species from 14 genera and 11 families are registered, of these, nine species are recorded from the Thai fauna for the first time. A new species of the genus Dolicheremaeus (Otocepheidae) – D. phatthayaensis sp. n. – is described. The supplementary description of Galumna paracalcicola Ermilov et Anichkin, 2014 is presented based on specimens from Thailand. Identification keys to the known representatives of the genera Dolicheremaeus from Thailand and Galumna from the Oriental region are presented. Galumna indica Hafeez Kardar, 1989 and G. striata Hafeez Kardar, 1989 are combined in the genus Setogalumna.

Open Access: Yes

DOI: 10.17109/AZH.69.2.93.2023