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Tytuł:
Agents and Multi-agent Systems in the Management of Electric Energy Systems
Autorzy:
Bitimanova, Saltanat
Shukirova, Aliya
Powiązania:
https://bibliotekanauki.pl/articles/24200526.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
communication protocol
electricity consumption
control system
planning
system modeling
Opis:
Electric energy systems need constant modernization and updating to solve such problems as distributed management, self-sealing, improving the quality of electricity, demand management, and integration of renewable energy systems. Currently, energy systems need advanced and intelligent technologies to perform various system-level tasks. The purpose of this research is to analyze the existing control systems of electric energy systems, as well as to consider the possibility of using multi-agent systems to control electric energy systems. To achieve the aim of the research, the following scientific approaches were implemented: method of direct research, experimental method, questioning, comparative method, analysis method, and method of observation. The primary value of the research is in the novelty of the work and the fact, that functional components in multi-agent systems act as independent agents, which can interact with each other through a message communication system. This provides a simple connection between the components, which can benefit complex systems designed for an intelligent network. The intelligent network provides an efficient energy management system, and the modernization of the existing power system using a multi-agent system provides solutions to many problems. The best implementation of a multi-agent system can be achieved through the employment of fast and protected communication protocols. The authors of the research have conducted research and presented key statistical data on electricity usage in Kazakhstan over the past few years. The practical significance of the research is determined by the applied results, and their scientific significance, which is conditioned upon the use of deep, modern mathematical results and the development of an optimal control system. This research is a part of a universal model and optimal system of emergency quick response, conducting a quick preliminary prognosis as well as ensuring more lasting planning in electricity consumption.
Źródło:
Management and Production Engineering Review; 2023, 14, 2; 99--110
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Claim modeling and insurance premium pricing under a bonus-malus system in motor insurance
Autorzy:
Ieosanurak, Weenakorn
Khomkham, Banphatree
Moumeesri, Adisak
Powiązania:
https://bibliotekanauki.pl/articles/24987758.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
bonus malus system
claim severity
exponential-GaL distribution
motor insurance
number of claims
Poisson-GaL distribution
system bonus malus
rozkład wykładniczy
ubezpieczenie komunikacyne
Opis:
Accurately modeling claims data and determining appropriate insurance premiums are vital responsibilities for non-life insurance firms. This article presents novel models for claims that offer improved precision in fitting claim data, both in terms of claim frequency and severity. Specifically, we suggest the Poisson-GaL distribution for claim frequency and the exponential-GaL distribution for claim severity. The traditional method of assigning automobile premiums based on a bonus-malus system relies solely on the number of claims made. However, this may lead to unfair outcomes when an insured individual with a minor severity claim is charged the same premium as someone with a severe claim. The second aim of this article is to propose a new model for calculating bonus-malus premiums. Our proposed model takes into account both the number and size of claims, which follow the Poisson-GaL distribution and the exponential-GaL distribution, respectively. To calculate the premiums, we employ the Bayesian approach. Real-world data are used in practical examples to illustrate how the proposed model can be implemented. The results of our analysis indicate that the proposed premium model effectively resolves the issue of overcharging. Moreover, the proposed model produces premiums that are more tailored to policyholders’ claim histories, benefiting both the policyholders and the insurance companies. This advantage can contribute to the growth of the insurance industry and provide a competitive edge in the insurance market.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2023, 33, 4; 637--650
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cognitive Modeling and Formation of the Knowledge Base of the Information System for Assessing the Rating of Enterprises
Autorzy:
Kryvoruchko, Olena
Desiatko, Alona
Karpunin, Igor
Hnatchenko, Dmytro
Lakhno, Myroslav
Malikova, Feruza
Turdaliev, Ayezhan
Powiązania:
https://bibliotekanauki.pl/articles/27311936.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
information security
audit
Bayesian network
artificial neural networks
Opis:
A mathematical model is proposed that makes it possible to describe in a conceptual and functional aspect the formation and application of a knowledge base (KB) for an intelligent information system (IIS). This IIS is developed to assess the financial condition (FC) of the company. Moreover, for circumstances related to the identification of individual weakly structured factors (signs). The proposed model makes it possible to increase the understanding of the analyzed economic processes related to the company's financial system. An iterative algorithm for IIS has been developed that implements a model of cognitive modeling. The scientific novelty of the proposed approach lies in the fact that, unlike existing solutions, it is possible to adjust the structure of the algorithm depending on the characteristics of a particular company, as well as form the information basis for the process of assessing the company's FC and the parameters of the cognitive model.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 4; 697--705
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Considerations regarding qiling system for offshore wind turbines
Autorzy:
Panaitescu, M.
Panaitescu, F. V.
Panait, P. G.
Scupi, A.
Powiązania:
https://bibliotekanauki.pl/articles/24201414.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
modeling and simulations
simulation study
wind turbine
lubricating oil system
wind loads
wind influence
floating wind farms
lubricating oil analysis
Opis:
Power from renewable sources would play a key role in the future of electricity .The wind energy is one of the goal of EU's commitment, which want to develop offshore wind potential [1], [2]. Lubrication of wind turbines is very important for maintenance [3] . The purpose of this paper is to present some considerations about monitoring oiling system. This system monitors kinematic data in real time. The importance of monitoring real data with this system help us to simulate lubrication for various types of wind turbine reducers in order to choose the optimal form of the lubrication system and for good maintenance.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 3; 563--567
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and modeling of the antenna system the direction finder unmanned aerial vehicle
Opracowanie i modelowanie systemu antenowego celownika bezzałogowego statku powietrznego
Autorzy:
Boiko, Juliy
Polikarovskykh, Oleksiy
Tkachuk, Vitalii
Powiązania:
https://bibliotekanauki.pl/articles/27315356.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
antennas
radiation pattern
modeling
voltage control
anteny
charakterystyka promieniowania
modelowanie
sterowanie napięciem
Opis:
The article is devoted to the design the proposed construction of the antenna system for the direction-finding complex of the unmanned aerial vehicle (UAV). The experimental part is represented by the results of mathematical modeling the behavior of the antenna in different parts the operating frequency range. The effectiveness of the adopted design solutions was evaluated in comparison with analogues of leading companies in the world. Based on the results of the research, the areas of application the antenna as part of the built-in functional mobile UAV direction finding systems were determined.
Artykuł poświęcony jest zaprojektowaniu proponowanej konstrukcji systemu antenowego dla zespołu radionawigacyjnego bezzałogowego statku powietrznego (BSP). Część eksperymentalna jest reprezentowana przez wyniki matematycznego modelowania zachowania anteny w różnych częściach zakresu częstotliwości pracy. Skuteczność przyjętych rozwiązań konstrukcyjnych została oceniona w porównaniu z odpowiednikami wiodących firm na świecie. Na podstawie wyników przeprowadzonych badań określono obszary zastosowania anteny w ramach wbudowanych funkcjonalnych mobilnych systemów radionamierzania bezzałogowych statków powietrznych.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 1; 26--32
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of an Information Security System Based on Modeling Distributed Computer Network Vulnerability Indicators of an Informatization Object
Autorzy:
Lakhno, Valerii
Alimseitova, Zhuldyz
Kalaman, Yerbolat
Kryvoruchko, Olena
Desiatko, Alona
Kaminskyi, Serhii
Powiązania:
https://bibliotekanauki.pl/articles/27311974.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
information security
informatization object
distributed computing network
mathematical model
vulnerability coefficient
virtualization
IDS
SIEM
Opis:
A methodology for development for distributed computer network (DCN) information security system (IS) for an informatization object (OBI) was proposed. It was proposed to use mathematical modeling at the first stage of the methodology. In particular, a mathematical model was presented based on the use of the apparatus of probability theory to calculate the vulnerability coefficient. This coefficient allows one to assess the level of information security of the OBI network. Criteria for assessing the acceptable and critical level of risks for information security were proposed as well. At the second stage of the methodology development of the IS DCN system, methods of simulation and virtualization of the components of the IS DCN were used. In the course of experimental studies, a model of a protected DCN has been built. In the experimental model, network devices and DCN IS components were emulated on virtual machines (VMs). The DCN resources were reproduced using the Proxmox VE virtualization system. IPS Suricata was deployed on RCS hosts running PVE. Splunk was used as SIEM. It has been shown that the proposed methodology for the formation of the IS system for DCN and the model of the vulnerability coefficient makes it possible to obtain a quantitative assessment of the levels of vulnerability of DCN OBI.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 475--483
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid texture and gradient modeling for dynamic background subtraction identification systemin tobacco plant using 5G data service
Autorzy:
Gowda Thirthe, M.T.
Chandrika, J.
Powiązania:
https://bibliotekanauki.pl/articles/38699145.pdf
Data publikacji:
2023
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
background subtraction
local binary pattern
tobacco plant
texture
Gaussian mixture model
illumination change
plant disease identification system
usuwanie tła
lokalny wzorzec binarny
tytoń
tekstura
model mieszaniny Gaussa
zmiana oświetlenia
system identyfikacji chorób roślin
Opis:
Background: Detecting the plants as objects of interest in any vision-based input sequence is highly complex due to nonlinear background objects such as rocks, shadows,etc. Therefore, it is a difficult task and an emerging one with the development of precision agriculture systems. The nonlinear variations of pixel intensity with illuminationand other causes such as blurs and poor video quality also make the object detection taskchallenging. To detect the object of interest, background subtraction (BS) is widely usedin many plant disease identification systems, and its detection rate largely depends on thenumber of features used to suppress and isolate the foreground region and its sensitivitytoward image nonlinearity. Methodology: A hybrid invariant texture and color gradient-based approach is proposed to model the background for dynamic BS, and its performance is validated byvarious real-time video captures covering different kinds of complex backgrounds and various illumination changes. Based on the experimental results, a simple multimodal featureattribute, which includes several invariant texture measures and color attributes, yieldsfinite precision accuracy compared with other state-of-art detection methods. Experimental evaluation of two datasets shows that the new model achieves superior performanceover existing results in spectral-domain disease identification model. 5G assistance: After successful identification of tobacco plant and its analysis, the finalresults are stored in a cloud-assisted server as a database that allows all kinds of 5G servicessuch as IoT and edge computing terminals for data access with valid authentication fordetailed analysis and references.
Źródło:
Computer Assisted Methods in Engineering and Science; 2023, 30, 1; 41-54
2299-3649
Pojawia się w:
Computer Assisted Methods in Engineering and Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Management system structure vs. Behavior - a supply chain simulation analysis
Autorzy:
Pietroń, Roman
Powiązania:
https://bibliotekanauki.pl/articles/27313410.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
supply chain
bullwhip effect
inventory control
simulation modeling
łańcuch dostaw
efekt byczego bicza
kontrola zapasów
modelowanie symulacyjne
Opis:
Purpose: The purpose of this article is to present a research report on a system dynamics simulation modeling and experimenting of bullwhip effect (BWE) to examine effectiveness of some selected inventory control policies with down- and upstream information flow in a Beer Distribution Game (BDG) of a supply chain structure. Design/methodology/approach: The impact of systems’ structures and decision making policies in supply chains or logistics systems are measured and analyzed by an application of systems thinking paradigms and approaches. Particularly, the continuous simulation modeling approach with systems thinking Iceberg model metaphor, allowing to focus on strategic aspects of management with some recommendation to design better structures and decision making policies are taken. For the bullwhip effect analysis of a supply chain example (based on BDG model), a System Dynamics (SD) continuous simulation modeling method with some proposals in order to analyze feedback loop dominance are undertaken to explain supply chain behaviors and to make some sensitivity analysis for decision making (inventory control) policies. Findings: The research findings outline the impact of cause - effect relations, feedback loops polarities, and decision making policies to particular behaviors of the BDG supply chain. Research limitations/implications: Because of complexity of heuristic methods for feedback loop dominance analysis only simple approach was applied (LPD), and some selected scenario for simulation experiments were undertaken resulting in limited conclusions. Practical implications: The conclusions of the research draw some practical recommendations for a design of information sharing system and an effectiveness of some inventory control policies to be applied in supply chains. Social implications: One of the systems thinking elements in practical management is an influence to mental models of managers and decision makers. Managers in supply chain systems particularly need some recommendations to avoid bullwhip effect negative impacts. Additionally, managers and also scholars still call for more research to investigate the design and decision making in supply chains, therefore systems thinking simulation research can bridge the gap between traditional operations research and management with other approaches to provide insight into supply-chain dynamics and deliver impactful suggestions to managers. Originality/value: The paper gives a concept of supply chain dynamic analysis by an application of Iceberg model systems thinking metaphor, feedback loop dominance analysis, and a measurement of some selected inventory control policies effectiveness.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2023, 169; 575--597
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass-Spring System (MSS) 3D simulation of a thin flexible membrane with a new model of the elasticity parameters
Autorzy:
Tudruj, Sylwester
Kurec, Krzysztof
Piechna, Janusz
Kamieniecki, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/27309882.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Mass-Spring Systems (MSS)
spring coefficient
physically based modeling
bubble
inflation test
układy masa-sprężyna (MSS)
współczynnik sprężystości
modelowanie fizyczne
bańka
test inflacyjny
Opis:
Mass Spring Systems (MSS) are often used to simulate the behavior of deformable objects, for example in computer graphics (modeling clothes for virtual characters) or in medicine (surgical simulators that facilitate the planning of surgical operations) due to their simplicity and speed of calculation. This paper presents a new, two-parameter method (TP MSS) of determining the values of spring coefficients for this model. This approach can be distinguished by a constant parameter which is calculated once at the beginning of the simulation, and a variable parameter that must be updated at each simulation step. The value of this variable parameter depends on the shape changes of the elements forming the mesh of the simulated object. The considered mesh is built of elements in the shape of acute-angled triangles. The results obtained using the new model were compared to FEM simulations and the Van Gelder model. The simulation results for the new model were also compared with the results of the bubble inflation test.
Źródło:
Archive of Mechanical Engineering; 2023, LXX, 2; 199--218
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and simulation of the furniture manufacturing and assembly process in the Arena simulation software
Modelowanie i symulacja procesu wytwarzania i montażu mebli w programie symulacyjnym Arena
Autorzy:
Kolny, Damian
Kaczmar-Kolny, Ewa
Dulina, Ľuboslav
Powiązania:
https://bibliotekanauki.pl/articles/31232952.pdf
Data publikacji:
2023
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
manufacturing system
modeling
simulation
production
assembly
process improvement
system produkcyjny
modelowanie
symulacja
produkcja
montaż
usprawnianie procesu
Opis:
The article describes issues related to creating discrete simulation models for the implementation of the furniture manufacturing and assembly process in a furniture company. The methodology of the manufacturing system analysis was presented, which is aimed to support the appropriate approach to the construction of simulation models. The scope of the work includes the technological identification of the furniture manufacturing and assembly process in real production conditions, on the basis of which the appropriate simulation model was built. The course of the process was analyzed in the Arena software on the basis of a computer simulation based on reports. As a result of the simulation of the manufacturing process with the use of information from report of usage, an area for improvement was located. The re-analysis of the material flow made it possible to propose a change in the input parameters for the simulation model in the indicated area. The results of the second simulation show significant changes in the effective use of workstations and increase in the efficiency of the production line. In practice, it can be the basis for introducing simulated changes in the production system.
W artykule opisano zagadnienia związane z tworzeniem dyskretnych modeli symulacyjnych dla realizacji procesu wytwarzania i montażu mebli w przedsiębiorstwie branży meblarskiej. Przedstawiono metodykę analizy systemu wytwarzania, która ma za zadanie wspierać właściwe podejście dla budowy modeli symulacyjnych. Zakresem praca obejmuje identyfikację technologiczną procesu wytwarzania i montażu mebli w rzeczywistych warunkach produkcyjnych, w oparciu o którą zbudowano właściwy model symulacyjny na przykładzie procesu wytwarzania w rzeczywistych warunkach produkcyjnych. Analizę przebiegu procesu na podstawie symulacji komputerowej w oparciu o raporty przeprowadzono w oprogramowaniu Arena. W wyniku przeprowadzonej symulacji procesu wytwarzania z wykorzystaniem informacji z raportu obciążeń stanowiskowych zlokalizowano obszar do doskonalenia. Powtórna analiza przepływu materiałowego pozwoliła zaproponować zmianę parametrów wejściowych dla modelu symulacyjnego we wskazanym obszarze. Wyniki drugiej symulacji wskazują istotne zmiany w zakresie efektywnego wykorzystania stanowisk pracy oraz zwiększenia wydajności linii produkcyjnej. W praktyce może to stanowić podstawę do wprowadzenia symulowanych zmian w omawianym systemie produkcyjnym.
Źródło:
Technologia i Automatyzacja Montażu; 2023, 1; 13-22
2450-8217
Pojawia się w:
Technologia i Automatyzacja Montażu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability analysis of multi-site damage with failure dependency of the turbine based on flow-thermal-solid coupling analysis and the Monte Carlo validated simulations
Autorzy:
Qian, Wenxue
Zeng, Xianhai
Huang, Shuanghui
Yin, Xiaowei
Powiązania:
https://bibliotekanauki.pl/articles/27312780.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
flow-thermal-solid coupling analysis
Monte Carlo simulation
turbine disk
multiple loads
probabilistic modeling
system reliability with failure dependency
Opis:
The harsh environmental loads may lead to strength failure in the turbine in an aero-engine. To accurately assess the strength reliability of the turbine under multiple loads, the stress distributions of 41 danger sites of a turbine under thermal, centrifugal, and pneumatic loads were determined by the flow-thermal-solid coupling analysis using ANSYS. Second, based on the flow-thermal-solid coupling analysis and response surface method, the probabilistic analysis model of stress at the danger site was established. And the probabilistic distribution of stress was determined by sampling and hypothesis testing. Finally, the reliability model of the turbine with multi-site damage and failure dependency was established, by which a reliability of 0.99802 was calculated. And the actual reliability of the turbine was 0.99626 determined by the Monte Carlo simulations, which verified the model in precision. The results indicated that the reliability model has a high efficiency and higher precision than the traditional reliability model with failure independence.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 3; art. no. 168771
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research and modeling of the reliability of overhead lines of 6 to 10 kV with consideration of the influence of the external environment
Badania i modelowanie niezawodności linii napowietrznych od 6 do 10 kV z uwzględnieniem wpływu środowiska zewnętrznego
Autorzy:
Yashkov, Vladimir
Konarbaev, Akmaral
Dzhumamukhambetov, Nasikhan
Arystanaliev, Esengeldy
Kulzhanov, Dyussembek
Powiązania:
https://bibliotekanauki.pl/articles/27312539.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
exploitation
ensuring
power system
refuse
meteorological factors
eksploatacja
zapewnienie
system elektroenergetyczny
odpady
czynniki meteorologiczne
Opis:
The relevance of this study is due to the fact that the presented object of scientific work, namely 6–10 kV overhead lines, plays an important role in the process of providing electrical energy to consumers of the oil industry. The aim of the work is a detailed analysis of the reliability of overhead lines which are exploited in the difficult natural and climatic conditions of the Caspian region and Mangyshlak and the introduction of effective modeling tools for overhead lines. The methods used include the analytical method, theoretical method, logical analysis method, functional method, statistical method, synthesis method and others. In the course of the study, the natural and climatic conditions of the Atyrau region and their differences were noted and the reliability of the power supply systems was also analyzed. The most damaged elements of industrial power supply systems and their part of failures were identified in comparison with other elements of the power supply system. It was determined that the electrical power sector plays a crucial role in the oil and gas sector by determining the solution of the production tasks of all departments which have a significant impact on the formation of economic indicators. The practical value of the revealed results is that they will help to highlight the problems of operational reliability of the 6–10 kV overhead lines, considering the various natural and climatic factors, which in turn will help to change the power supply scheme and increase the resistance to external influences.
Znaczenie niniejszej pracy wynika z faktu, że prezentowany w artykule obiekt: linie napowietrzne 6–10 kV odgrywają ważną rolę w procesie dostarczania energii elektrycznej odbiorcom przemysłu naftowego. Celem pracy jest szczegółowa analiza niezawodności linii napowietrznych eksploatowanych w trudnych warunkach przyrodniczo-klimatycznych regionu Morza Kaspijskiego i Mangyszłaku oraz wprowadzenie efektywnych narzędzi do modelowania linii napowietrznych. Stosowane metody obejmują metodę analityczną, metodę teoretyczną, metodę analizy logicznej, metodę funkcjonalną, metodę statystyczną, metodę syntezy i inne. W trakcie badań odnotowano warunki przyrodnicze i klimatyczne regionu Atyrau oraz ich różnice, a także przeanalizowano niezawodność systemów zasilania. Zidentyfikowano najbardziej uszkodzone elementy przemysłowych systemów zasilania oraz ich część awarii w porównaniu z innymi elementami systemu zasilania. Stwierdzono, że sektor elektroenergetyczny odgrywa kluczową rolę w sektorze naftowo-gazowym, determinując rozwiązanie zadań produkcyjnych wszystkich działów, które mają istotny wpływ na kształtowanie się wskaźników ekonomicznych. Praktyczną wartością uzyskanych wyników jest to, że pomogą one uwidocznić problemy niezawodności pracy linii napowietrznych 6–10 kV z uwzględnieniem różnych czynników przyrodniczych i klimatycznych, co z kolei przyczyni się do zmiany schematu zasilania i zwiększenia odporności na wpływy zewnętrzne.
Źródło:
Polityka Energetyczna; 2023, 26, 1; 43--58
1429-6675
Pojawia się w:
Polityka Energetyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The New Analytical Model of Free Resources in the Limited Availability Resources
Autorzy:
Nowak, Błażej
Stasiak, Maciej
Zwierzykowski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/27312948.pdf
Data publikacji:
2023
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
analytical modeling
limited-availability group
multi-service system
networks
Opis:
The article presents a new analytical model for determining the probability of availability of a certain amount of well-defined free resources (e.g. a link) in a group of dedicated resources (e.g. a group of links) jointly serving a mixture of different classes of multiservice traffic. The presented method can be used to model access to resources in data centers, in particular in the software-defined networks, assuming – for reliability reasons – that the user should have access to a certain minimum number of specific separated resources. The proposed analytical model was verified by appropriate simulation experiments, which confirmed the satisfactory accuracy of the results obtained.
Źródło:
Journal of Telecommunications and Information Technology; 2023, 4; 102--107
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D CAD model for a quadrotor system modeling and control
Autorzy:
Raheemah, Fatima A.
Hussein, Mustafa T.
Powiązania:
https://bibliotekanauki.pl/articles/2096198.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
quadrotor
SimMechanics/MATLAB
CAD model
unmanned aerial vehicles
model CAD
bezzałogowe statki powietrzne
Opis:
In this paper, the work focus on the advantages of several engineering software to present a case study for the quadrotor system by a used 3D CAD model. The CAD model initially generated using one of the CAD software and it can be accessed from MATLAB software and converted into a virtual physical model. Quadrotors are unmanned aerial vehicles capable of vertical takeoff, hovering, and landing. The quadrotor is distinguished by its small size, flexibility, and maneuverability. The small sensors and actuators used in these systems are effective enough in comparison with the larger systems. The CAD model for the quadrotor system in this study is used to show the capability of the 3D model implementation in modeling and control. These models echo on the real-time models to improve the behavior in the real world. The actual quadrotor device was converted from the real system to a 3D model. Also, the model is converted to SimMechanics for the sake of simulation. Two different control methods are used in this work to stable the motion of the quadrotor system. First the adaptive sliding mode controller with the adaptive controller. Second the adaptive sliding mode controller with the PID controller. The simulation results show the model works fine with the controllers and it preserves the desired position and attitude along the desired predefined path. The results shown when a comparison was made that the ratio of error for PID controller is better.
Źródło:
Diagnostyka; 2022, 23, 2; art. no. 2022203
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the effectiveness of lightning and surge protection in a large solar farm
Autorzy:
Sobolewski, Konrad
Sobieska, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/2086693.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ANSYS simulations
electric safety
grounding system
magnetic field distribution
lightning modeling
lightning protection
photovoltaic power plant
Opis:
The aim of the considerations presented in the article was a stand-alone groundbased photovoltaic power plant. The article is devoted to the qualitative analysis of some lightning protection configurations. These types of constructions often require an individual look at the design and execution of lightning protection installations, which causes problems with the selection of optimal solutions. These problems relate primarily to the way the lightning rods are arranged to create protection zones, but also to the way they are attached: to the supporting structure for PV modules or as free-standing. Another problem raised in the article is the way how lightning current is discharged from rods to the ground and how it is dispersed there. Due to the vast area of such facilities and the requirements for electrical safety, it is necessary to consider and design a ground system with optimal electrical parameters, but also technical and economic ones. All these elements have their impact on the value of voltages induced in the electrical installation, which is also presented in the content of the article as the magnetic field distribution and calculation of induced voltages in an exemplary configuration. Finally, this article will compare described technical solutions encountered in selecting the best protection method for this type of photovoltaic installation.
Źródło:
Archives of Electrical Engineering; 2022, 71, 2; 523--542
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 572

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