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Found 6319 publications

General formulation for the resilience of processing systems

Ákos Orosz Jean Pimentel Ferenc Friedler

Publication Name: Chemical Engineering Transactions

Publication Date: 2020-01-01

Volume: 81

Issue: Unknown

Page Range: 859-864

Description:

Resilience is one of the key indicators of processing systems, it expresses the behaviour of the system as a result of expected or unexpected failures. This indicator can be essential during systems design and operation, especially, when the system is part of or related to a critical infrastructure. The numerous contributions on systems resilience are related to a wide range of applications, however, there is no general uniform framework for resilience evaluation. For instance, most studies examine resilience as a function of the continuous parameters of the system, usually avoiding the influence of its structure. In the current work, a general framework for determining the structural resilience of processing systems is presented. This framework derives on formulas that satisfy the requirements of the original definition of resilience. The formerly developed P-graph framework is the mathematical basis of the procedure for determining the indicator. The resilience of the system is calculated as a function of the operative subprocesses for all possible failures and is a normalized indicator on [0, 1]. The examination of two industrial case studies shows that the proposed resilience can be an appropriate indicator to be considered in process design.

Open Access: Yes

DOI: 10.3303/CET2081144

Model-Free Control of Finger Dynamics in Prosthetic Hand Myoelectric-based Control Systems

Claudiu Radu Pozna Emil M. PETRIU Radu Emil Precup Teodor Adrian TEBAN Adriana ALBU Raul Cristian ROMAN

Publication Name: Studies in Informatics and Control

Publication Date: 2020-01-01

Volume: 29

Issue: 4

Page Range: 399-410

Description:

This paper proposes an approach to the tuning of model-free controllers for the midcarpal joint angles, which are important finger angles that ensure the desired finger dynamics in prosthetic hand myoelectric-based control systems. The process in these control systems is characterized by fuzzy models that operate with myoelectric signals obtained from eight myoelectric sensors and past inputs and/or outputs, where the controlled outputs are five finger angles. Since the fuzzy models exhibit very good performance as shown in authors’ recent papers that produced evolving fuzzy models, they are used to simulate the process behaviour. The Multi Input-Multi Output (MIMO) control system structure consists of five separate Single Input-Single Output control loops with the most simple model-free controllers represented by intelligent Proportional (iP) controllers, separately designed and tuned for each finger. Digital simulation results are included to suggestively illustrate the very good performance of the control systems with iP controllers. The MIMO control system performance is compared with that of the same system but with Proportional-Integral controllers, which are optimally tuned in a model-based manner by a metaheuristic Grey Wolf Optimizer (GWO) algorithm. The fair comparison is ensured by the optimal tuning of the free parameters of iP controllers in a model-based manner using GWO.

Open Access: Yes

DOI: 10.24846/V29I4Y202002

The Impact of Blockchain on Medical Tourism

Horst Treiblmaier John G. Keogh Abderahman Rejeb

Publication Name: Lecture Notes in Business Information Processing

Publication Date: 2020-01-01

Volume: 403

Issue: Unknown

Page Range: 29-40

Description:

Medical tourism has witnessed significant growth over the last decade. This nascent sector creates a new tourist class with access to affordable healthcare services by combining healthcare services with tourism and hospitality. Information technology is an essential factor, which can enable the growth of medical tourism. Technology enables the search process for information about the available services, costs, hospitality, tourism and post-treatment options. However, these technologies are primarily legacy systems and lack interoperability. Several questions arise, including the potential patient-tourist ability to verify crucial factors such as the quality of care and the credentials of the medical professionals and medical facilities. Moreover, questions arise regarding patient-doctor trust, procedure and risk transparency‚ medical record privacy and other health-related hazards in specific procedures. In this conceptual paper, we investigate the potential benefits of Blockchain technology to address some of the open questions in medical tourism. We conclude that Blockchain technology can benefit medical tourism, and we lay the foundation for future research.

Open Access: Yes

DOI: 10.1007/978-3-030-67781-7_4

An efficient evolutionary metaheuristic for the traveling repairman (Minimum latency) problem

Peter Foldesi Boldizsar Tuu-Szabo Ĺaszĺo T. Ḱoczy

Publication Name: International Journal of Computational Intelligence Systems

Publication Date: 2020-01-01

Volume: 13

Issue: 1

Page Range: 781-793

Description:

In this paper we revisit the memetic evolutionary family of metaheuristics, called Discrete Bacterial Memetic Evolutionary Algorithm (DBMEA), whose members combine Furuhashi’s Bacterial Evolutionary Algorithm and various discrete local search techniques. These algorithms have proven to be efficient approaches for the solution of NP-hard discrete optimization problems such as the Traveling Salesman Problem (TSP) with Time Windows. This paper presents our results in solving the Traveling Repairman Problem (also called Minimum Latency Problem) with a DBMEA variant. The results are compared with state-of-the-art heuristics found in the literature. The DBMEA in most cases turned out to be faster than all other methods, and for the bigger benchmark instances it was also found to have better solutions than the former best-known results. Based on these test results we claim to have found the best approach and thus we suggest the use of the DBMEA for the Traveling Repairman Problem, especially for large instances.

Open Access: Yes

DOI: 10.2991/ijcis.d.200529.001

Intelligent production of the future - first results of a survey

No authors available

Publication Name: 17th IMEKO TC 10 and EUROLAB Virtual Conference "Global Trends in Testing, Diagnostics and Inspection for 2030"

Publication Date: 2020-01-01

Volume:

Issue:

Page Range: 402-407

Description:

Witnessing the unprecedented scale and speed of industry transformation due to digitization in general and the emergence of smart solutions in all aspects of manufacturing in particular, it is well justified to deal with the question of what production of the future will look like. How intelligent will it be when the hard challenges and disruptive effects of the changes will be overcome, and what are the chances to meet the critical requirements of collaboration and cooperation, flexibility and competitiveness? What are the technological and management tools to avoid being stuck in the so-called pilot purgatory? These issues are addressed in an international survey based on a questionnaire specifically tailored to conclude to viable options and recommendations for industrial companies. The results that are mostly in conformity with those published in the literature show that there is yet a lot to do to facilitate a definite turn in the mindset of the actors and to make them realize the relevance of simultaneous and continuous cultural and technological development.

Open Access: No

DOI: DOI not available

Relationships between cycle theories, sustainable tourism, and the effects of the COVID-19 in Hungary

Laszlo Vasa Bulcsú Remenyik Dániel Horváth

Publication Name: Economic Annals Xxi

Publication Date: 2020-01-01

Volume: 185

Issue: 9-10

Page Range: 79-90

Description:

Examining cycle theories calls our attention to the fact that tourism will be described by descending and ascending curves within certain periods in the future. According to cycle theories, the downturn in the tourism industry will continue from four to five years. According to the study conducted by the authors, domestic tourism will become more intensive, trips will have spatial limitations, the length of stay will increase, and cars will be the most popular means of transport. As part of the research, the authors surveyed 230 respondents concerning tourism activities. An in-depth interview was carried out with Zoltán Somogyi, a former Deputy Secretary General of the UNWTO, about the possibilities of solving the effects of COVID-19. To address COVID-19 challenges, the Hungarian government is required to make quick decisions. Demand needs to be diversified, and new sustainable tourism products need to be introduced. Visits to Hungary should be extended in space and time, and an interest in domestic tourists in the state should be increased by implementing strong marketing. More serious regulations should be adopted with the participation of local entrepreneurs; more consideration should be given to contactless technologies. In the post-COVID-19 period, the overtourism in Hungary should be replaced by sustainable and creative tourism.

Open Access: Yes

DOI: 10.21003/EA.V185-08

EUROPEAN CAPITAL OF CULTURE 2023 - COMPARATIVE ANALYSIS OF THE HUNGARIAN CANDIDATE CITIES

No authors available

Publication Name: DETUROPE

Publication Date: 2020-01-01

Volume: 12

Issue: 2

Page Range: 84-104

Description:

A Hungarian city will be designated as the European Capital of Culture in 2023. The series of programmes are designed to show the multi-colour European culture, accordingly, the cultural values and cultural dimensions of the cities are in the focus. Several cities take part in the competition in the customary way by submitting their tender documentation within the framework of a pre-selection procedure. Győr, Veszprém and Debrecen proved to be the most probable candidate cities to win in Hungary, they were chosen to enter the second round of the selection procedure. Although the focus of intense attention usually falls on the cultural programmes planned for the project year, the period of the competition itself is also regarded an exciting phase of the project, since this is the period when candidate cities are expected to give an account of their plans, moreover, they are also expected to outline their projected development conception in the field of culture and their cultural potentials. The present study aims to analyse and confront the plans of three Hungarian cities that were selected to enter the second round of the competition and, consequently, it also intends to explore the visions, the strengths and weaknesses of the Hungarian cities of outstanding cultural ambitions mainly via factors denoted in figures. Today we know, that the winning city became Veszprém. Although based on the quantitative data we saw the other two cities as more likely to win, due to a number of qualitative as well as subjective factors, the city of Veszprém proved to be better during the selection procedure. We do not want to override the decision; we only outline an analytical framework for the cultural comparison of our culturally ambitious Hungarian cities.

Open Access: No

DOI: DOI not available

The Economic Structure and Performance of the Catchment Area of the Hungarian Regional Centers

No authors available

Publication Name: DETUROPE

Publication Date: 2020-01-01

Volume: 12

Issue: 3

Page Range: 58-81

Description:

This study examines the economic structure and performance of urban catchment areas. The five largest Hungarian regional centers are a traditional part of the Hungarian city network, as they are the five most populous cities after Budapest. The approach of territorial research is increasingly focused on the fact that the city as a center should not be studied without its immediate surroundings (agglomeration, region, catchment area). This study also keeps this in mind. The data were processed for the period between 1992 and 2015, on the basis of which the change can also be examined. Development trajectories show very different tendencies; Győr operates the catchment area as a strong center, while the surroundings of Pécs became fragmented due to the weakness of the center. Miskolc is characterized by a stagnant area, where the operation of another sub-center is very intensive, thus improving economic performance. Szeged is a solid center, whose catchment area is stabilized by several substations. The area of Debrecen is divided, the center is not able to energize its area.

Open Access: No

DOI: DOI not available

On wavelet based enhancing possibilities of fuzzy classification methods

Ferenc Lilik Brigita Sziová Levente Solecki Ĺaszĺo T. Ḱoczy Szilvia Nagy

Publication Name: Journal of Automation Mobile Robotics and Intelligent Systems

Publication Date: 2020-01-01

Volume: 14

Issue: 2

Page Range: 32-41

Description:

If the antecedents of a fuzzy classification method are derived from pictures or measured data, it might have too many dimensions to handle. A classification scheme based on such data has to apply a careful selection or processing of the measured results: either a sampling, re-sampling is necessary. or the usage of functions, transfor-mations that reduce the long, high dimensional observed data vector or matrix into a single point or to a low number of points. Wavelet analysis can be useful in such cases in two ways. As the number of resulting points of the wavelet analysis is approximately half at each filters, a consecutive application of wavelet transform can compress the me-asurement data, thus reducing the dimensionality of the signal, i.e., the antecedent. An SHDSL telecommunication line evaluation is used to demonstrate this type of appli-cability, wavelets help in this case to overcome the pro-blem of a one dimensional signal sampling. In the case of using statistical functions, like mean, variance, gradient, edge density, Shannon or Rényi entropies for the extraction of the information from a picture or a measured data set, and they don not produce enough information for performing the classification well enough, one or two consecutive steps of wavelet analysis and applying the same functions for the thus resulting data can extend the number of antecedents, and can dis-till such parameters that were invisible for these functions in the original data set. We give two examples, two fuzzy classification schemes to show the improvement caused by wavelet analysis: a measured surface of a combustion engine cylinder and a colonoscopy picture. In the case of the first example the wear degree is to be deter-mine, in the case of the second one, the roundish polyp content of the picture. In the first case the applied statistical functions are Rényi entropy differences, the structural entropies, in the second case mean, standard deviation, Canny filtered edge density, gradients and the entropies. In all the examples stabilized KH rule interpolation was used to treat sparse rulebases.

Open Access: Yes

DOI: 10.14313/JAMRIS/2-2020/18