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Tytuł:
Meta-Systemic Model of Transformation: A General Complexity-Based Approach in Political Science and International Relations
Autorzy:
Baranowski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/15847709.pdf
Data publikacji:
2023-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Arab Spring
complexity
complex adaptive system
system
system analysis
Opis:
System-based research remains an important yet usually outdated and internally contradictory approach in political science and international relations. Based on concepts borrowed from physiology, cybernetics, and general system theory, the system-based approach popularised in the 1960s was cast away as outdated and ill-focused. Despite those systems, the theory was developed in natural sciences, eventually creating a paradigm more applicable to domestic and international politics. The weakest element of past systems (like the one proposed by D. Easton) was that they did not allow for a sudden and catastrophic transformation and lacked emergence. This paper aims to present a model that would allow for the system’s ordinary and catastrophic transformation. The complex adaptive system features were defined using relevant literature on a paradigm of complexity. Connecting it with the propositions of D. Easton, R. Axelrod, and M. Cohen, as well as R. Jervis, such a model was constructed. The theoretical introduction is supplanted with a general case study of the early phases of the Arab Spring in Tunisia. The model mirrors the complex systems’ dynamics, considering the agent-structure problem.
Źródło:
Polish Political Science Yearbook; 2023, 2(52); 113-128
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Method of Analysis of Safety Systems Dedicated to the Systems in Rail Vehicle
Autorzy:
Gill, Adam
Powiązania:
https://bibliotekanauki.pl/articles/503792.pdf
Data publikacji:
2013
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
safety systems
safety system analysis
Layer of Protection Analysis
Opis:
The detailed algorithm of SSARV(P) – Safety System Analysis of Rail Vehicles is presented in this paper. Particular steps of SSARV(P) take into account the selected rules of LOPA – Layer of Protection Analysis. SSARV(P) is an overall method of SSARV provided for conceptual phase of safety system. The essence of SSARV(P) is to evaluate the proposed safety system based on measures of hazard risk. The measure of hazard risk is determined using known risk models. This paper presents also a description of LOPA and its general algorithms. Basic information about the independent layers of protection are presented as well.
Źródło:
Logistics and Transport; 2013, 18, 2; 67-76
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decomposition and the interaction decoupling mode in electrical systems analysis
Autorzy:
Płaczek, S.
Powiązania:
https://bibliotekanauki.pl/articles/97258.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
system complexity
hierarchy
decomposition
coordination
system analysis
algorithm concurrence
Opis:
Decomposition is the best method to analyze complicated systems. The whole system is divided into a set of smaller parts, i.e. subsystems. These items are connected to each other by input and output interfaces. Every subsystem could be analyzed using separate algorithms and procedures that are more suitable for solving the local task. In the article, a complicated electrical system is decomposed and the interaction decoupling mode is used to coordinate the local task solution. Each of the first–level subsystems, such as an optimization problem, is defined completely independently from the other problems. The subsystems are instructed to select the local input as well as the local interface output in an optimal fashion. The local task's solution depends not only on the internal subsystems’ parameters, but on the value of interfaces too. To achieve the global task solution, local tasks have to be coordinated using an appropriate coordination principle.
Źródło:
Computer Applications in Electrical Engineering; 2016, 14; 187-200
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building an ontology for system analysis
Autorzy:
Burov, Y.
Pasichnyk, A.
Katrenko, V.
Powiązania:
https://bibliotekanauki.pl/articles/411235.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
system analysis
ontology
pattern
model
concept
semantic grid
Opis:
System analysis as scientific and engineering discipline underpins research and development in other areas. However, system analysis models and methods are often taught separately and, as a result, system analyst cannot form a holistic understanding of this area. In order to deepen our understanding of system analysis’ concepts and relations the ontology of this area was built. It was constructed based on models and methods of system analysis considered as knowledge patterns. The concept of system was selected as a central concept of ontology. Other important concepts, such as goal, function, decision and process are relating to it. Finally, the applications of created system analysis ontology for teaching system analysis in high school and as a part of semantic grid are discussed.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2018, 7, 3; 3-6
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy efficiency – selected thermo-ecological problems
Autorzy:
Ziębik, Andrzej
Stanek, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/239928.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy efficiency
system analysis
exergy
thermo-ecology
energy ecological
efficiency
Opis:
The paper is devoted to some problems connected with last modification of EU directive on energy efficiency, viz.: free choice of the measure concerning the improvement of energy efficiency, i.e. final or primary energy consumption, corresponding energy savings or energy-consumption index; however without cumulative consumption or cumulative savings of primary energy. In EU directive it has been stressed the importance of measurements systems (reliable measurement information); but has not been recommended any advanced validation of measurements results, nor energy auditing or algorithms of calculating the energy savings due to improvement of energy efficiency concerning large industrial plants. Evaluation of complex buildings should be realized by means of the system method (input-output analysis). The separate problem is devoted to application of thermo-ecological approach in the analysis of complete results of improving the energy efficiency. Human activity is connected with the depletion of nonrenewable resources, including primary energy, due to not only production of consumer goods but also the necessity of compensating the unfavourable effects of harmful emissions from energy-technological processes. Therefore the index of energy-ecological efficiency has been proposed as the most competent evaluation of improvement energy efficiency of production processes and systems.
Źródło:
Archives of Thermodynamics; 2020, 41, 2; 277-299
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of wavelet transform to identification of modal parameters of nonstationary systems
Zastosowanie transformaty falkowej do identyfikacji parametrów modalnych układów niestacjonarnych
Autorzy:
Uhl, T.
Klepka, A.
Powiązania:
https://bibliotekanauki.pl/articles/281277.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
wavelets transform application
modal model parameters identification
nonstationary system analysis
Opis:
In the paper an application of a time-frequency signal analysis technique for modal parameters identification is presented. Procedures of wavelet filtering, which allow estimating mechanical parameters for systems with non-constant parameters have been shown. The wavelets are used to detect natural frequency of the system and transform system time response into the time-scale domain. Presented method has been verified on simulation data for a two degrees of freedom discrete system. Two cases have been considered, with a constant and with a varying damping. The procedure has been applied to a real data recorded during a flight of ISKRA airplane.
W artykule przedstawiono możliwość zastosowania transformaty falkowej do identyfikacji parametrów modalnych układów mechanicznych. Pokazano procedury filtracji falkowej pozwalającej na wyznaczanie parametrów dynamicznych układów wykazujących niestacjonarność. Metodę zweryfikowano na danych symulacyjnych dla układu o dwóch stopniach swobody ze zmiennym tłumieniem. Opracowaną metodę zastosowano do badania zmian tłumienia w czasie lotu samolotu ISKRA.
Źródło:
Journal of Theoretical and Applied Mechanics; 2005, 43, 2; 277-296
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Outlier detection in the analysis of nested Gage R&R, random effect model
Autorzy:
Abduljaleel, Mohammed
Midi, Habshah
Karimi, Mostafa
Powiązania:
https://bibliotekanauki.pl/articles/1192468.pdf
Data publikacji:
2019-08-30
Wydawca:
Główny Urząd Statystyczny
Tematy:
measurement system analysis
mm location
nested Gage R&R
outlier
residuals
Opis:
Measurement system analysis is a comprehensive valuation of a measurement process and characteristically includes a specially designed experiment that strives to isolate the components of variation in that measurement process. Gage repeatability and reproducibility is the adequate technique to evaluate variations within the measurement system. Repeatability refers to the measurement variation obtained when one person repeatedly measures the same item with the same Gage, while reproducibility refers to the variation due to different operators using the same Gage. The two factors factorial design, either crossed or nested factor, is usually used for a Gage R&R study. In this study, the focus is only on the nested factor, random effect model. Presently, the classical method (the method of analysing data without taking into consideration the existence of outliers) is used to analyse the nested Gage R&R data. However, this method is easily affected by outliers and, consequently, the measurement system’s capability is also affected. Therefore, the aims of this study are to develop an identification method to detect outliers and to formulate a robust method of measurement analysis of nested Gage R&R, random effect model. The proposed methods of outlier detection are based on a robust mm location and scale estimators of the residuals. The results of the simulation study and real numerical example show that the proposed outlier identification method and the robust estimation method are the most successful methods for the detection of outliers.
Źródło:
Statistics in Transition new series; 2019, 20, 3; 31-56
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a leveling system for construction equipment
Autorzy:
Dedov, Denis
Siukhin, Alexandr
Obukhov, Artem
Powiązania:
https://bibliotekanauki.pl/articles/375008.pdf
Data publikacji:
2019
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
levelling system
construction equipment
algorithmic support
system analysis
system niwelacji
maszyny budowlane
wsparcie algorytmiczne.
analiza systemu
Opis:
The quality of the roadway has a significant impact on the ability of drivers to drive their vehicles. Violation of the integrity of the coating, its geometrical parameters (shape), and the condition of the surface of the coating adversely affect the behavior of drivers, does not allow for correct driving of the vehicle, and leads to the occurrence of traffic accidents of varying severity. The current problem in the implementation of road construction works is to increase the level of automation of construction equipment and increase the accuracy of profiling. The article considers the main types of leveling systems, the scope of their application, advantages, and disadvantages. Based on the conducted analysis, the recommendations are formulated for the developed automated leveling system, its structure, and principles of functioning. The main components of the leveling system, their functions, and the connections between them are considered. The scientific novelty of this article is to develop an original algorithm for the functioning of an automated leveling system. It includes the main stages of the profiling process: installation by a laser plane, determination of its position, adjustment of the position of the working element of construction equipment, and differs due to the necessary mathematical support for the implementation of the laser plane control process. The algorithm allows one to develop software that implements the basic operations of managing the profiling process.
Źródło:
Transport Problems; 2019, 14, 3; 49-62
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power system stability with parallel active filter ensuring compensation of capacitive reactive power of a resonant LC circuit
Autorzy:
Płatek, T.
Powiązania:
https://bibliotekanauki.pl/articles/201301.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
parallel active filter
passive filter
system stability analysis
Opis:
This paper presents an analysis allowing for the determination of the differential equation describing the circuit of the active filter inverter output current control with an additional measurement of input voltage. The resulting equation allows to determine the conditions that ensure stable operation of the filter with the load in form of a resonant LC circuit. Analysis results were confirmed by computer simulation and experimental studies of commercial active filter.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 2; 353-361
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Notes Towards a Multifaceted Approach to Political Stability
Autorzy:
Carp, Radu
Perlikowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/42938776.pdf
Data publikacji:
2024-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
multifaceted approach to political stability
political stability
system analysis approach
asynchronism
political theory
Opis:
This paper seeks to improve comprehension of issues related to political stability. The primary elucidating tool employed is the multifaceted approach to political stability. This is the idea that similar political stability mechanisms can be observed in many different political contexts. These phenomena consist of conspicuous discrepancies between the stability of dimensions or layers of the political sphere. The lack of congruency between political stability and economic stability, differences between the stability of government authorities and the stability of the whole political system, or the gap between social and political stability are examples that are not difficult to grasp in ordinary observations of political appearances. The main task of this paper is to explain and elaborate on the reasons behind this phenomenon. As an additional value, some suggestions of how our findings can change the view on the method of research on political stability are to be found. The outcome of our investigation can be applied to comparative politics, constitutional studies, and political system analysis. The paper is particularly significant for empirically oriented political theory.
Źródło:
Polish Political Science Yearbook; 2024, 2(53); 5-14
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dealer-service center competitiveness increase using modern management methods
Poprawa konkurencyjności dealerskiego centrum serwisowego przy wykorzystaniu nowoczesnych metod zarządzania
Autorzy:
Makarova, I.
Khabibullin, R.
Belyaev, A.
Belyaev, E.
Powiązania:
https://bibliotekanauki.pl/articles/375158.pdf
Data publikacji:
2012
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
dealerskie centrum serwisowe
metoda BSC
analiza systemu
dealer-service center
BSC method
system analysis
Opis:
In article the method of a management automotive company dealer -service network by application of decision-making allowing support system on the basis of network subjects functioning indicators analysis and comparison of their values during the previous and present periods to develop the decision in the field of spare parts deliveries optimization is offered.
Źródło:
Transport Problems; 2012, 7, 2; 53-59
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of production line measurement process quality
Ocena jakości procesu pomiarowego na linii produkcyjnej
Autorzy:
Zalewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/256409.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
measurement process
repeatability analysis
reproducibility analysis
Measurement System Analysis
MSA
production process
proces pomiarowy
analiza powtarzalności
analiza odtwarzalności
proces produkcyjny
Opis:
In production control processes, many decisions are made based on measurements conducted during the production itself. Therefore, the product quality, the equipment operating conditions, and the course of production process are all influenced by the quality of measurement system in use. Repeatability and Reproducibility Analysis (R&R), which is one of the methods of Measurement System Analysis (MSA), can be used in order to evaluate the measurement system’s precision. This article presents an evaluation of a measurement system, transferred directly from a Control Department to a Production Line in one of the enterprises in Podlaskie region. For the calculation, the author used the results of a measurement experiment in the surveyed enterprise carried out in the STATISTICA software. There was also an analysis conducted of cause-and-effect in relation to measurement processes of bad quality.
W procesach sterowania produkcją wiele decyzji podejmowanych jest na podstawie przeprowadzonych w jej trakcie pomiarów. Jakość stosowanego procesu pomiarowego ma więc wpływ na jakość wyrobów, warunki eksploatacji maszyn, przebieg procesu produkcji. Do oceny poprawności systemu pomiarowego można wykorzystać analizę powtarzalności i odtwarzalności (R&R), która jest jedną z metod analizy MSA (Measurement System Analysis). W artykule przedstawiono ocenę jakości systemu pomiarowego, który został przeniesiony z działu kontroli jakości bezpośrednio na linię produkcyjną w jednym z przedsiębiorstw w województwie podlaskim. Do obliczeń wykorzystano wyniki eksperymentu pomiarowego w badanym zakładzie opracowane przy użyciu aplikacji STATISTICA. Przeprowadzono również analizę przyczynowo-skutkową złej jakości procesów pomiarowych.
Źródło:
Problemy Eksploatacji; 2014, 3; 151-163
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Reliability of Measurement Data and Adequacy of the Measurement Systems in Improving Quality of Casting Products
Autorzy:
Fedoryszyn, A.
Brzeziński, M.
Powiązania:
https://bibliotekanauki.pl/articles/380770.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quality control
cast quality
measurement system analysis
repeatability analysis
reproducibility analysis
kontrola jakości
jakość odlewu
analiza systemu pomiarowego
analiza powtarzalności
analiza odtwarzalności
Opis:
The study summarises the analysis of reliability assessment of measurements of a selected critical property of a high-precision casting product. Measurement data must be sufficiently reliable to be used in decision-making relating to quality control and the selection of the casting manufacturing technology. The applied procedure is illustrated by study of the variability range of readouts depending on the measurement conditions, obtained by the computer methods. The applied R&R (Repeatability and Reproducibility) procedure is major component of the widely employed Measurement System Analysis (MSA).
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 124-126
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Shoreline Changes and the Groundwater Quality along the Coast of Kuakata, Patuakhali, Bangladesh
Autorzy:
Goswami, Sukhen
Rahman, Shaikh Ashikur
Alam, Mir Md. Tasnim
Rahman, Mahfuzur
Rafiq, Md. Risalat
Jaman, Md. Hasnat
Roy, Dhiman Kumer
Powiązania:
https://bibliotekanauki.pl/articles/2173235.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
saline water intrusion
hydrogeochemical analysis
digital shoreline analysis system
salinity
Opis:
Shoreline changes and groundwater quality monitoring have become pressing issues for the coastal region of Bangladesh. This study investigated the shoreline changes from 2000 to 2020 and evaluated the groundwater quality, as well as SWI in the Kuakata coastal area. While analyzing satellite images, the temporal shoreline changes were assessed through the Digital Shoreline Analysis System (DSAS) in ArcGIS 10.4.1. Higher erosion rates (>2 m/year) were found in the southernmost part and the SE part of the studied area. Twenty-five groundwater samples were collected, and the physicochemical parameters were measured to assess the groundwater quality. The geographic information system (GIS) was used to assess the spatial variation of the EC, pH, and Cl⁻ contents through the inverse distance weighted (IDW) interpolation method. The EC, Cl⁻, and pH values of the studied groundwater ranged from (1.2 mS/cm to 19.5 mS/cm), (79.88 mg/L to 11241.67 mg/L), and (7.9 to 8.7), repectively. The analysis revealed that the majority of the groundwater samples were unsuitable for drinking purpose due to higher EC and Cl⁻ values. Saline water intrusion (SWI) was determined by using the alternative EC vs Cl⁻ method in the southern part of the Kuakata beach area, which was closest to the sea.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 323--332
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System analysis of the problem of workers’ rights in the encyclical “Rerum Novarum” by Leo XIII
Autorzy:
Zaborek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2189128.pdf
Data publikacji:
2022
Wydawca:
Fundacja Instytut Nauki o Polityce
Tematy:
Catholic Social Teaching
cybernetics
Leo XIII
Polish School of Cybernetics
Rerum Novarum
sociocybernetics
system analysis
workers’ rights
Opis:
The article uses the method of system analysis to analyse the vision of society outlined in the encyclical “Rerum Novarum” by Leo XIII. The system analysis concerned the identification and problem analysis with elements of mathematical analysis (according to the Konieczny division). In the course of the analysis, used were the concepts developed at the Polish School of Cybernetics, the main representatives of which were Mazur and Kossecki. The basics of system analysis, autonomous systems were presented and the division into systems was made for further analysis. System energy/material processes in terms of energy, power and freedom factor of the systems as well as the information processes in terms of social norms were taken into account. As a result of the analysis, it was revealed that the system of social control proposed by Pope Leo XIII assumes primacy of ideological norms (Catholicism) and ethical norms, with simultaneous occurrence of economic and vital norms. The system of society proposed by Pope Leo XIII is coherent, resistant to disturbances and striving for effective expansion, and what is more, it solves a given social problem. The weakness of that system is susceptibility to ideological indifference, weakening ethics and disturbing the process of ideological and ethical programming. The implementation of ideological and ethical norms into the society takes place mainly through the educational process. Further research possibilities and limitations of the tools used were also indicated.
Źródło:
Polish Journal of Political Science; 2022, 8, 3; 22-35
2391-3991
Pojawia się w:
Polish Journal of Political Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided FMS machine tools subsystem selection using the evolutionary system of multicriteria analysis
Autorzy:
Gola, A.
Montusiewicz, J.
Świć, A.
Powiązania:
https://bibliotekanauki.pl/articles/118157.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
machine tools selection
Evolutionary System of Multicriteria Analysis
ESAW
Opis:
One of the key problems in the area of flexible manufacturing systems (FMS) design is a problem of proper design of manufacturing subsystem and especially the machine tools selection. Although the problem seems to be simple, in fact it is difficult to solve because of large variety and number of parameters and also brief foredesign which are highly influential for the decision. This study shows possibility of implementation the Evolutionary System of Multicriteria Analysis for defining the importance of solutions in the process of casing-class FMS machine tools selection.
Źródło:
Applied Computer Science; 2011, 7, 1; 18-29
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Information and Analysis System Supporting Risk Management During the Planning and Implementation Stage of Police Activities — the Essence and Possibilities of Use for Teaching Purposes
Autorzy:
Bogdalski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1374883.pdf
Data publikacji:
2018
Wydawca:
Wyższa Szkoła Policji w Szczytnie
Tematy:
information and analysis system
police operations
emergency situations
police training
Opis:
The article presents the essence and operational potential of the information and analysis system supporting the decision making process within the framework of security-related policing operations. This system is being developed by a scientific consortium led by the Police Academy, Szczytno. The project finance is provided by the National Centre for Research and Development. The main element to ensure the effectiveness of the system in question will be an application with a planning and decision mechanism and prediction algorithms. The above mentioned algorithms are designed to provide information on the probability of success of police operations and on the necessary costs which must be incurred in a given crisis situation in order to implement their individual, expected variants. Using historical data and algorithms developed on its basis, the system is supposed to indicate the relevant forces and resources required, the methods and tactics for operations and characteristics of the security infrastructure. Moreover, the publication presents the fundamental mechanisms of the police command and control process during emergency situations and general remarks regarding the professional development of those who manage these types of policing operations. In the author’s opinion, of particular importance in this respect is the course addressed to commissioned police officers trained to be commanders or deputy commanders of security-related policing operations, where classes are conducted using a simulator for police operations in emergency situations. It is a form of advanced command staff training with the use of a virtual computer simulation system. The simulator makes it possible to develop algorithms for dealing with crisis incidents and to improve the command process during emergencies. One of the practical goals of developing the information and analysis system is its integration with the simulator for police operations in emergency situations. In this respect, it is supposed to be a tool used in multimedia decision-making training. The author comes to the conclusion that the expected functionalities of the information and analysis system will have a positive effect both on the educational process of improving professional qualifications of commanders of security-related policing operations and on the real planning, implementation and assessment of the operations themselves.
Źródło:
Internal Security; 2018, 10(1); 35-44
2080-5268
Pojawia się w:
Internal Security
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An adaptive method based on PC-Kriging for system reliability analysis of truss structures
Autorzy:
Chen, Pengyu
Zhao, Cunbao
Yao, He
Zhao, Shengnan
Powiązania:
https://bibliotekanauki.pl/articles/27312783.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
trade-off
truss structures
system reliability analysis
global metamodel
local metamodel
representative failure modes
Opis:
In practice, a truss consists of a large number of members which makes it a complex system. This leads to difficulties to estimate the system reliability due to computational costs. An adaptive method is thereby proposed to deal with this issue. It constructs a global metamodel to quickly estimate the rough reliability index of a truss. According to the estimated reliability index, the differential evolution algorithm is performed to generate more samples located in an expanded domain so that more representative failure modes can be identified. Combined with AK-SYSi, local metamodels of representative failure mods are built, and updated through active learning. When the convergence criterion is satisfied, the results of system reliability analysis can be obtained. Eventually, two examples of truss structures are studied to illustrate the superiority of the proposed method in balancing accuracy and efficiency. The results indicate that the proposed method makes a good balance between accuracy and efficiency when it is applied to analyze the system reliability of the truss.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 3; art. no. 169497
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validating a destructive measurement system using Gauge R&R — a case study
Autorzy:
Sharma, Mithun
Sahni, Sanjeev P.
Sharma, Shilpi
Powiązania:
https://bibliotekanauki.pl/articles/125507.pdf
Data publikacji:
2019
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
Six Sigma
destructive testing
measurement system analysis
Gauge R&R
crossed Gauge R&R
test niszczący
analiza systemu pomiarowego
Gage R&R
Opis:
The research study aims to evaluate the precision of the measurement system using Gauge R&R. An experimental research design adopting a positivist empirical approach with deductive strategy was followed to assess the effectiveness of Crossed Gauge R&R technique for validating a measurement system using destructive testing. Crossed Gauge R&R technique in Minitab was found to be highly effective in quantifying different components of measurement variation relative to process variation. Clue generation from the Crossed Gauge R&R study combined with manufacturing and measurement process know-how helped in identifying and eliminating the root causes for measurement variation. Overall Crossed Gauge R&R proved successful in validating the burst strength test equipment. However, it should be noted that manufacturing and test equipment played an equally important part in developing and executing the gauge R&R study and accurately analysing the results. So, Crossed Gauge R&R should be used as an aid rather than the solution for measurement system validation.
Źródło:
Engineering Management in Production and Services; 2019, 11, 4; 34-42
2543-6597
2543-912X
Pojawia się w:
Engineering Management in Production and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How does applying of one or two orthoses influence gait parameters of children with hemiplegia?
Autorzy:
Boryczka-Trefler, Anna
Syczewska, Małgorzata
Stępowska, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/306803.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
porażenie mózgowe
orteza
chód
cerebral palsy
hemiplegia
orthoses
VICON MX system gait analysis
gait parameters
Opis:
The aim of this study was to evaluate how wearing one or two orthoses influence the gait parameters in children with hemiplegia. Four children with hemiplegic cerebral palsy participated in the study. Patients were from 3 to 7 years old; one girl and three boys; one patient with right side hemiplegia, three patients with left side hemiplegia. Patients underwent the VICON MX system gait analysis three times (sessions): one with bare feet, the other two with shoes and orthoses: one with orthoses used unilaterally on palsied limb, one with orthoses used bilaterally. The following gait parameters were analyzed: velocity, cadence, pelvis tilt, range of pelvic movement in sagittal plane, separately for affected and non-affected side: step length, stance time (as a percentage of the gait cycle), range of hip movement in sagittal plane, knee flexion at initial contact, maximum knee flexion in swing phase. Results of the study showed which and how many gait parameters changed while wearing one in comparison with two orthoses. The results did not give a clear indication which condition is better: wearing one or two orthoses, however they suggest that when the orthotic devices are considered for patients with hemiplegic cerebral palsy, the objective, instrumented gait analysis can be used to take the best decision whether one or two orthoses should be prescribed.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 2; 95-100
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement system analysis of attribute or continuous data, as a one of the first steps in Lean Six Sigma projects
Analiza systemu pomiarowego danych atrybutowych i ciągłych, jako jeden z pierwszych kroków projektów Lean Six Sigma
Autorzy:
Wojtaszak, M.
Biały, W.
Powiązania:
https://bibliotekanauki.pl/articles/113317.pdf
Data publikacji:
2013
Wydawca:
STE GROUP
Tematy:
measurement system analysis
lean management
Six Sigma
Gage R&R
measurement error
analiza systemu pomiarowego
zarządzanie szczupłe
pomiar powtarzalności i odtwarzalności
błąd pomiarowy
Opis:
Measurement System Analysis is a part of “Measure” phase, which is a structured project management approach. This approach consist of the following steps: Define, Measure, Analyze, Improve, Control – “DMAIC” and is a path to resolve production problems based on Lean Six Sigma methodology. This method has been presented by using of computer aided statistical software – Minitab – which is a most common statistical software, used by Green or Black Belts. As a Master Black Belt I faced to the problem of lack an appropriate explanation of using it by the Belts – which contributed by implementation of a proper training program. Measurement system analysis in this program, is divided by Attribute Agreement Analysis, which is analysis of attribute data, and Gage R&R – analysis for continuous data. Therefore it is very important to understand differences between attribute and continuous date and their main metrics. Understanding data types, allowed to explain components of measurement errors. This base knowledge is a foundation of measurement system analysis and going further – base knowledge of each Green or Black Belt.
Analiza systemu pomiarowego jest częścią fasy "Pomiar", która jest ustrukturyzowanym podejściem do zarządzania projektami. To podejście składa się z następujących kroków: definiowanie, pomiar, analizowanie, poprawa, kontrola/sterowanie – "DMAIC" i jest drogą do rozwiązania problemów produkcyjnych opartych na metodologii Lean Six Sigma. Metoda ta została przedstawiona za pomocą komputerowego wspomagania statystycznych prac inżynierskich – Minitab – jest najczęściej spotykanym oprogramowanie statystyczne, wykorzystane przez Green lub Black Beltów. Jako Master Black Belt zetknąłem się z problemem braku odpowiedniego wyjaśnienia/zrozumienia I jego wykorzystania przez Beltów – co przyczyniło by wdrożenia odpowiedniego programu szkoleniowego. Analiza systemu pomiarowego w tym programie, jest podzielona na analizę systemu pomiarowego dla danych atrybutowych, oraz Gage R&R – analiza systemu pomiarowego dla danych ciągłych. W związku z tym bardzo ważne jest, aby zrozumieć różnice pomiędzy danymi atrybutowymi, a ciągłymi oraz ich główne współczynniki/metryki. Zrozumienie typu danych pozwoli na wyjaśnienie składników błędów pomiarowych. Ta podstawowa wiedza jest fundamentem analizy systemu pomiarowego, a idąc dalej – podstawową wiedzą każdego Green lub Black Belta.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2013, 1 (3); 144-162
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stiffness characteristics of main bearings foundation of marine engine
Autorzy:
Murawski, L.
Powiązania:
https://bibliotekanauki.pl/articles/247486.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dynamic stiffness of main engine bearings
shaft line alignment
crankshaft springing
marine propulsion system numerical analysis
Opis:
During shaftline alignment and crankshaft springing analyses, knowledge of stiffness of radial bearings is essential. Dynamic stiffness's characteristics of marine main body are difficult to estimate because of lack of available documentation and complicated shape of the body. In the literature, there is a lack of the detailed data on the stiffness of the crankshaft foundation in the frame of marine main engine. Those parameters are crucial for the shaft line alignment analysis as well as for the analysis of interactions between the shaft line and the crankshaft. Especially for the high power engines, the correct model of the boundary conditions plays a key role during the analysis. The paper presents the methodology of the characteristics determination of the marine engine’s body as well as the example of computations for a MAN B&W K98MC type engine mounted on a ~3000 TEU container ship. The model of main engine body is relatively big – it contains over 800 thousand degree of freedom. The elasticity of ship hull has been estimated and taken into account during analysis. It has been found, that static stiffness parameters recommended by the producer for the shaft line alignment are evaluated correctly, however they represent only the flexibility of the engine’s body, not taking into account the flexibility of the ship’s hull. What is more, the dynamic magnification of vibration amplitudes is not taken into account.
Źródło:
Journal of KONES; 2016, 23, 1; 239-246
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of measurement system quality on the evaluation of process capability indices
Wpływ jakości systemu pomiarowego na ocenę współczynników zdolności procesu
Autorzy:
Czarski, A.
Matusiewicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/264171.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
zarządzanie jakością
metody statystyczne
statystyczne sterowanie procesem
SPC
analiza systemu pomiarowego
MSA
metoda R&R
zdolność procesu
quality management
statistical methods
statistical process control
R&R method
measurement system analysis
capability analysis
Opis:
Among statistical instruments of quality Statistical Process Control (SPC) and Measurement Systems Analysis (MSA) take particular place. The proper quality of measurement data - verification and assurance of this quality are the task of MSA - guarantees an opportunity to carry out a solid SPC analysis supplying information about a process behavior. One of the principal tasks of SPC is estimation of capability of a process i.e. the assessment of process potential as for variability regarding expectations defined by specification limits. Data for analysis of a process capability are the results of measurements made by means of a determined measurement system. The variability of this measurement system must influence the results of capability assessment, however the measurement system adequate to control the process should guarantee that the impact is little enough to be omitted. The subject of the work is the analysis of influence of measurement system variability on evaluation of process capability indices. The mutual relations between process variability and measurement system variability present analytical relationships and experimental research given in the work. The aim of the tests was an assessment of a capability of the process of steel drop forgings' heat treatment relating to a hardness. The methodology demonstrated in the work is valid quality standards compatible (ISO 9000, ISO/TS 16949 etc.).
Wśród statystycznych narzędzi jakości szczególne miejsce zajmują: statystyczne sterowanie procesem (SPC) oraz analiza systemów pomiarowych (MSA). Odpowiednia jakość danych pomiarowych - weryfikacja i zapewnienie tej jakości to zadanie MSA - gwarantuje możliwość przeprowadzenia rzetelnej analizy SPC dostarczającej istotnych informacji o zachowaniu się procesu. Jednym z podstawowych zadań SPC jest ocena zdolności jakościowej procesu, tj. ocena możliwości procesu ze względu na zmienność w odniesieniu do oczekiwań definiowanych granicami specyfikacji. Dane do analizy zdolności procesu są wynikiem pomiarów wykonanych za pomocą określonego systemu pomiarowego. Zmienność tego systemu pomiarowego musi wpływać na wyniki oceny zdolności, niemniej odpowiedni do nadzorowania procesu system pomiarowy powinien gwarantować, aby wpływ ten był na tyle mały, że pomijalny. Przedmiotem artykułu jest analiza wpływu zmienności systemu pomiarowego na ocenę współczynników zdolności procesu. Wzajemne relacje pomiędzy zmiennością procesu oraz zmiennością systemu pomiarowego przestawiają podane w pracy związki analityczne oraz badania eksperymentalne. Celem badań była ocena zdolności procesu obróbki cieplnej odkuwek stalowych do uzyskiwanej twardości. Metodyka zaprezentowana w pracy jest zgodna z obowiązującymi standardami jakości (ISO 9000, ISO/TS 16949 itp.).
Źródło:
Metallurgy and Foundry Engineering; 2012, 38, 1; 25-32
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical note. The concept of a computer system for interpretation of tight rocks using X-ray computed tomography results
Autorzy:
Habrat, M.
Krakowska, P.
Puskarczyk, E.
Jędrychowski, M.
Madejski, P.
Powiązania:
https://bibliotekanauki.pl/articles/178712.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
tight gas
shale gas
X-ray computed tomography
tight rocks
computer system for rock analysis
Opis:
The article presents the concept of a computer system for interpreting unconventional oil and gas deposits with the use of X-ray computed tomography results. The functional principles of the solution proposed are presented in the article. The main goal is to design a product which is a complex and useful tool in a form of a specialist computer software for qualitative and quantitative interpretation of images obtained from X-ray computed tomography. It is devoted to the issues of prospecting and identification of unconventional hydrocarbon deposits. The article focuses on the idea of X-ray computed tomography use as a basis for the analysis of tight rocks, considering especially functional principles of the system, which will be developed by the authors. The functional principles include the issues of graphical visualization of rock structure, qualitative and quantitative interpretation of model for visualizing rock samples, interpretation and a description of the parameters within realizing the module of quantitative interpretation.
Źródło:
Studia Geotechnica et Mechanica; 2017, 39, 1; 101-107
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surveys of consumer preferences of the operation and management of water supply
Badania sondażowe preferencji konsumenckich na temat funkcjonowania oraz zarządzania dostawą wody
Autorzy:
Pietrucha-Urbanik, K.
Studziński, A.
Powiązania:
https://bibliotekanauki.pl/articles/388216.pdf
Data publikacji:
2016
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
water network
consumer assessment
water supply system functioning analysis
sieć wodociągowa
ocena konsumencka
analiza funkcjonowania systemu zaopatrzenia w wodę
Opis:
The permanent and long-lasting development of the civilization influences the growth of the threat occurrence connected with the functioning of Water Supply System (WSS). The presented methodology can be used to describe the functioning of the public water supply using the evaluation of its proper functioning and allows for implementation to determine proper operation of water network. The expanded methodology of conducted surveys of recipients in the field of the effectiveness of the water supply system is the basis for a comprehensive assessment of its proper functioning. Consumer opinions may be used in determining water supply reliability standards and the rules for granting discounts and rebates in the case of restrictions and interruptions in water supply. A significant issue is the assessment by respondents nuisance interruptions in water supply (time and frequency), knowledge of the causes, inconveniencing and losses that causes lack of water supply. In the work the results of consumer survey during undesirable events in Polish water networks were presented.
Stały i długotrwały rozwój cywilizacji wpływa na wzrost występowania zagrożeń związanych z funkcjonowaniem systemu zaopatrzenia w wodę (SZW). Prezentowana metodologia może być stosowana w celu oceny prawidłowego funkcjonowania wodociągów. Opinie konsumentów mogą być stosowane przy określaniu standardów niezawodności usług wodociągowych oraz zasad udzielania bonifikat i upustów w przypadku ich niedotrzymania. Ważnym zagadnieniem jest ocena przez respondentów uciążliwości (czasu oraz częstotliwości), uniedogodnień, a także wielkości strat finansowych spowodowanych brakiem dostawy wody. W pracy przedstawiono wyniki badań oceny konsumentów podczas zdarzeń niepożądanych w polskich systemach wodociągowych.
Źródło:
Ecological Chemistry and Engineering. A; 2016, 23, 3; 299-311
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Note on Analysis of BPMN Diagrams
Przyczynek do analizy diagramów BPMN
Autorzy:
Ligęza, A.
Powiązania:
https://bibliotekanauki.pl/articles/275284.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
notacja modelowania procesów biznesowych
BPMN
reguły biznesowe
systemy regułowe
analiza systemowa
weryfikacja systemów
bezpieczeństwo
niezawodność
efektywność
poprawność
Business Process Modeling Notation (BPMN)
business rules
rule-based systems
system analysis
system verification
safety
reliability
efficiency
correctness
Opis:
BPMN has recently become a de facto standard for modeling and design of complex software intensive processes. It is widely used not only in the Business Process domain. Numerous tools supporting visual edition have been developed. Despite its unquestionable advantages the semantic analysis of logical properties seems to be one of the weaknesses of this formalism. In order to assure reliable process execution the overall structure of the graph and its logical operation should be verified.
BPMN staje się powoli standardem de facto w modelowaniu i projektowaniu procesów zawierających istotne komponenty programowe. Jest powszechnie stosowany nie tylko dla modelowania procesów biznesowych. Zaimplementowano wiele narzędzi wspomagających wizualne projektowanie diagramów BPMN. Niestety, pomimo niezaprzeczalnych sukcesów semantyka BPMN i analiza własności logicznych stanowią ciągle słabe strony. Aby zapewnić niezawodną pracę systemów, należy przeprowadzić formalną analizę systemu.
Źródło:
Pomiary Automatyka Robotyka; 2011, 15, 12; 210-212
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the relationship between selected stability assessment indicators on the example of leaning out the human body from the upright position
Autorzy:
Matuszewska, Agata
Buśkiewicz, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2146560.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
postural stability
extrapolated centre of mass
foot support polygon
motion analysis system
stabilność posturalna
ekstrapolowany środek masy
wielokąt podparcia
system analizy ruchu
Opis:
The objective of this paper is to study the margin of stability when trying to lean out the body forward and backward. The centre of mass of the body, the velocity of the centre of mass and extrapolated centre of mass were calculated for four participants. The analyzed movement was recorded by using BTS Motion Capture system. Recordings, in which participants were unable to return to the upright position, were also observed. In these cases, it was verified the usefulness of extrapolated centre of mass for predicting the foot support area that enables maintaining the body balance. The relationship between the applied stability indicators and anthropometric parameters was determined. The preliminary results obtained confirm the validity of the use of selected parameters in tests and in assessment of the stability of the human body, and indicate the directions of further tests for a larger group of participants and other movement activities.
Źródło:
Vibrations in Physical Systems; 2020, 31, 2; art. no. 2020219
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study methodology of the architectural periodization of Algerian mosques and the ritual role of elements (Mihrab, Minbar, Qibla, Bath for Ablution) in the Islamic worship service
Autorzy:
Kouider, R.
Ivashko, J.
Powiązania:
https://bibliotekanauki.pl/articles/905450.pdf
Data publikacji:
2018
Wydawca:
Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
Tematy:
mosques of Algeria
architectural periodization
system-structural analysis
water
ritual ablution
meczety w Algierii
periodyzacja architektoniczna
analiza strukturalna systemu
woda
rytualna ablucja
Opis:
The article introduces a study methodology of the architectural periodization of Algerian mosques based on the systematic structural analysis. The specificity of the Islamic architectural school of Algeria is the simultaneous combination of the traditions of many cultures, imported from other countries, and local, different within certain regions. In the cities of Algeria, mosques with different spatial organization have survived: the so-called Arabian column type, the Maghreb type, the Kharijites type and the Ottoman type. As in the Islamic world in general, a special role in the mosques of Algeria is devoted to ritual ablution.
Źródło:
Środowisko Mieszkaniowe; 2018, 22; 28-36
1731-2442
2543-8700
Pojawia się w:
Środowisko Mieszkaniowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic aspects of component importance analysis for complex marine systems
Autorzy:
Chybowski, L.
Gawdzińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/135038.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
importance analysis
complex system
sensitivity analysis
marine system
economic aspects
computer simulation
Opis:
The paper presents the application of cost-based, component-importance measures for complex technical systems. A stern tube sealing system installed on a sea vessel was used as an example of a complex technical system. Selected statistics of a ship’s operation losses were calculated. Selected, known-importance measures were presented and the authors’ own approach to cost-based, component-importance analysis was shown. The following measures were discussed: the operation-interruption cost index, the maintenance potential, the simulation-based maintenance index, and maintenance and operational costs. A description of factors influencing the importance of the technical system components was provided.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 51 (123); 59-65
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pilot subjective decisions in aircraft active control system
Subiektywne decyzje pilota w aktywnym układzie sterowania samolotu
Autorzy:
Rohacs, J.
Kasyanov, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/280939.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
active control system
endogenous system
subjective analysis
Opis:
The aircraft conventional control systems including pilot-operators in loop are called as active endogenous systems, because the pilots react actively to real situations evaluated by them and their solutions origin from their minds, from the nervous system. The pilots must make decisions in situations characterised by lack of information, human robust behaviour and their individual capabilities. So, decisions born from reactions of pilot are an effect of subjective analysis. This paper investigates the aircraft landing. The subjective factor is the ratio of required and available time to decision on the go around. The decision depends on the available information and psycho-physiological condition of operator pilots and can be determined with the use of theory of statistical hypotheses. This paper introduces a modified Lorenz attractor for the modelling of the endogenous dynamics of the given active system.
Konwencjonalne układy sterowania samolotem, włączając w to rolę pilotów, nazywane są aktywnymi układami endogennymi z racji znaczenia bieżącej oceny sytuacji i reakcji pilotów wynikających z ich świadomości i cech układu nerwowego. Piloci muszą podejmować decyzje w warunkach braku pełnej informacji o parametrach lotu, posiadając przy tym swoiste cechy reaktywnych zachowań i własny zestaw wytrenowanych nawyków. W ten sposób analiza właściwości monitorowania samolotu staje się badaniem układu zawierającego zmienne subiektywne. W pracy zbadano problem podejścia do lądowania. Za czynnik subiektywny wzięto stosunek czasu wymaganego do faktycznie posiadanego przed podjęciem decyzji o możliwej rezygnacji z lądowania. Decyzja ta zależy od ilości zgromadzonych informacji w danej chwili oraz kondycji psycho-fizjologicznej pilotów i została opisana za pomocą hipotez statystycznych. Do zamodelowania dynamiki rozważanego endogennego układu sterowania samolotem użyto zmodyfikowanego atraktora Lorentza.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 1; 175-186
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comprehensive approach to the inventory control system improvement
Autorzy:
Krajčovič, M.
Plinta, D.
Powiązania:
https://bibliotekanauki.pl/articles/407413.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inventory control system
inventory analysis
ABC/XYZ analysis
Opis:
This paper describes a methodology for inventory analysis and reduction, which was developed at the Department of Industrial Engineering, Faculty of Mechanical Engineering, University of Zilina. The methodology describes the optimal procedure for the application of basic analytical methods and tools in practice. The results of the analysis are in the algorithm linked to the subsequent actions realized to improve inventory management system and to minimize inventory level in the company. Described procedure is the result of methodology examination and verification in practical conditions of production enterprises. In the following sections of this paper, there are presented a comprehensive approach to the inventory analysis and the own algorithm, which contains 3 phases: inventory analysis on enterprise level, summary analysis of individual item groups and individual analysis of material items. In the last section, there are described examples of results from such analysis and conclusions. The presented approach is an attempt to create a universal procedure of analysis which integrates methods and tools described in various publications.
Źródło:
Management and Production Engineering Review; 2012, 3, 3; 34-44
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of multi-criteria decision making methods for the assessment of optimal SVC location
Autorzy:
Aydin, Faruk
Gümüş, Bilal
Powiązania:
https://bibliotekanauki.pl/articles/2173650.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Borda count method
FACTS
MCDM
optimal location
PSAT
voltage stability
flexible alternating current transmission system
power system analysis toolbox
multi criteria decision making
metoda liczenia Bordy
podejmowanie decyzji wielokryterialnej
lokalizacja optymalna
stabilność napięcia
elastyczne systemy przesyłowe prądu przemiennego
narzędzia do analizy systemu zasilania
Opis:
The goal of multi-criteria decision making (MCDM) is to select the most appropriate of the alternatives by evaluating many conflicting criteria together. MCDM methods are widely available in the literature and have been used in various energy problems. The key problems studied in electrical power systems in recent years have included voltage instability and voltage collapse. Different flexible alternating current transmission systems (FACTS) equipment has been used for this purpose for decades, increasing voltage stability while enhancing system efficiency, reliability and quality of supply, and offering environmental benefits. Finding the best locations for these devices in terms of voltage stability in actual electrical networks poses a serious problem. Many criteria should be considered when determining the most suitable location for the controller. The aim of this paper is to provide a comparative analysis of MCDM techniques to be used for optimal location of a static VAR compensator (SVC) device in terms of voltage stability. The ideal location can be determined by means of sorting according to priority criteria. The proposed approach was carried out using the Power System Analysis Toolbox (PSAT) in MATLAB in the IEEE 14-bus test system. Using ten different MCDM methods, the most appropriate locations were compared among themselves and a single ranking list was obtained, integrated with the Borda count method, which is a data fusion technique. The application results showed that the methods used are consistent among themselves. It was revealed that the integrated model was an appropriate method that could be used for optimal location selection, providing reliable and satisfactory results to power system planners.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 2; art. no. e140555
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of American and Russian political discourse: A discourse analysis study
Autorzy:
Kopik, Monika
Powiązania:
https://bibliotekanauki.pl/articles/40221009.pdf
Data publikacji:
2023
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
discourse
political discourse
discourse analysis
American political system
Russian political system
comparative analysis
Opis:
This article provides an exhaustive analysis of American and Russian political discourse through the examination of the linguistic techniques employed by President Joe Biden and President Putin in their speeches. The aim of this research is to examine the linguistic approaches employed in referencing social and political traditions in the United States and Russia, investigate disparities in linguistic strategies within both political discourses, and assess variations in semantic outcomes. The analysis has been conducted to answer the following research questions: (1) What are the linguistic methods of referring to social and political traditions in America and Russia? (2) Do the linguistic strategies differ depending on the political discourse? (3) Is the semantic output different depending on the political discourse? The findings reveal marked differences between the two discourses, reflecting the social and political discrepancies between the political systems of the United States and Russia.
Źródło:
Linguistics Beyond and Within; 2023, 9; 49-59
2450-5188
Pojawia się w:
Linguistics Beyond and Within
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and evaluation of application of car modular systems in polish road transport
Autorzy:
Muślewski, Ł.
Lewalski, M.
Woropay, M.
Powiązania:
https://bibliotekanauki.pl/articles/246606.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport system
car modular system
SWOT analysis
efficiency
Opis:
This study presents an analysis and evaluation of application of European Car Modular Systems in the Polish road transport. Those systems and respective terminology have been analysed and classified. Application of such systems in other countries of the European Union has been described. SWAT analysis has also been carried out in order to enable the most optimal choice of modular system in freight transport to match the condition and characteristics of the Polish road infrastructure. The systems have also been analysed in terms of efficiency and the analysis was performed on the basis of a selected research object – a transport company. An analysis of costs and estimated profits from transport services to be provided by those systems has been carried out on the basis of the research object in comparison with costs borne by the considered company with currently used transport means. This study shows that taking into consideration the results of analyses, safety aspect, road infrastructure and energy efficiency of the vehicles it was found that the proposed oversized vehicles could be implemented to be used on the Polish roads. The analyses and tests performed for a transport logistic company discussed in this article have demonstrated that the proposed modular systems will undoubtedly allow reducing significantly the costs of transport services by increasing load capacity of vehicles.
Źródło:
Journal of KONES; 2015, 22, 4; 211-220
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity analysis of a fuzzy expert system for modelling dependencies in human operators’ emergency tasks
Autorzy:
Zio, E.
Baraldi, P.
Librizzi, M.
Podofillini, L.
Dang, H. V.
Powiązania:
https://bibliotekanauki.pl/articles/2069589.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
human reliability analysis
fuzzy expert system
sensitivity analysis
Opis:
This paper analyzes the behaviour of a fuzzy expert system for evaluating the dependence among successive operator actions, through a sensitivity analysis on the fuzzy input partitioning and assessment. Preliminary results are presented with respect to a case study concerning two successive tasks of an emergency procedure in a nuclear reactor. Work is in progress to perform a thorough sensitivity analysis to generalize the results obtained.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 2; 379--389
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comperative study on managers’ assessment of the selected properties of internal reports
Autorzy:
Dobroszek, Justyna
Zarzycka, Ewelina
Almasan, Alina
Circa, Cristina
Powiązania:
https://bibliotekanauki.pl/articles/947792.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
management information system
management accounting system
system
managers
cluster analysis
Opis:
An important role in an organization is played by the management information system that enables managers to perform management tasks. The pillar of this system is financial and non-financial data provided by the management accounting system. The effect of the application of specific management accounting tools are various types of studies and analyses, defined in internal reports, which are the basis for management, and thus making decisions by managers. Internal reports, in order to fulfil their functions effectively, must have appropriate features as to its structure, content and other properties. In connection with this, the authors studied and presented an assessment of managers from Poland and Romania in the context of such properties of internal reports as quality, content, presentation and comments. The survey method was used as the research method, while the analysis of collected research material was based on cluster analysis and descriptive statistics. The sample consisted of 154 questionnaires. The findings are similar in both countries, although in the case of Romania, managers who assessed highly the quality and content of internal reports, and evaluated slightly lower the presentations and comments.
Źródło:
Financial Sciences. Nauki o Finansach; 2018, 23, 3; 46-60
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and analysis of beam/bar structure by application of bond graphs
Modelowanie i analiza konstrukcji belkowo-prętowych z zastosowaniem grafów wiązań
Autorzy:
Orlikowski, C.
Hein, R.
Powiązania:
https://bibliotekanauki.pl/articles/279348.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
mechanical system
modelling
modal analysis
Opis:
The paper presents a uniform, port-based approach to modelling of beam/bar systems (trusses). The port-based model of such a distributed parameter system has been defined by application of the bond graph methodology and the distributed transfer function method (DTFM). The proposed method of modelling enables one to formulate input data for computer analysis by application of the DTFM. The constructed computational package enables frequency domain analysis. Additionally, the presented approach uses DTFM to obtain a modal reduced model of the considered system in the form of modal bond graph. The presented algorithm in a simply way allows one to obtain a modal reduced model of complex distributed-lumped parameter beam/bar systems.
W pracy przedstawiono jednolity sposób modelowania konstrukcji belkowo-prętowych (kratownice). Model rozważanego systemu o parametrach rozłożonych został opracowany przy zastosowaniu metodologii grafów wiązań i metody transmitancji układów o parametrach rozłożonych (DTFM). Proponowana metoda modelowania pozwala sformułować wygodny algorytm do analizy komputerowej z zastosowaniem DTFM. Opracowany system obliczeniowy umożliwia analizę w dziedzinie częstotliwości oraz otrzymanie zredukowanego modelu modalnego rozważanego układu w postaci modalnego grafu wiązań. Prezentowany algorytm w prosty sposób pozwala na uzyskanie zredukowanego modelu modalnego złożonych, dyskretno-ciągłych układów belkowo-prętowych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 4; 1003-1017
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Audit versus development in a certified quality management system
Audit a rozwój w certyfikowanym systemie zarządzania jakością
Autorzy:
Ligarski, M. J.
Powiązania:
https://bibliotekanauki.pl/articles/112614.pdf
Data publikacji:
2012
Wydawca:
STE GROUP
Tematy:
analiza
system zarządzania jakością
analysis
quality management system
Opis:
Analiza na potrzeby niniejszej pracy została przeprowadzona na dwóch typach auditów certyfikowanego systemu zarządzania jakością w kontekście pozyskania i przetworzenia informacji dotyczących rozwoju. Wskazano cele i etapy szeroko rozumianego procesu auditowania oraz wymieniono czynniki wpływające na wskazania rozwojowe system. Określono również wpływ organizacji na poszczególne etapy procesu auditowania. Szczególną uwagę poświęcono typom informacji dotyczących rozwoju, które są pozyskiwane w obu typach auditów. Wskazano również centra odpowiedzialności za pozyskanie i użycie informacji. Podjęto próbę odpowiedzi na pytanie, dotyczące źródeł problemów i przyczyn ich występowania.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2012, 1 (1); 124-132
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operating system efficiency evaluation on the base of measurements analysis with the use of non-extensive statistics elements
Autorzy:
Dymora, P.
Mazurek, M.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/106188.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Linux
operating system
efficiency
statistical analysis
self-similarity analysis
multifractal analysis
Opis:
The major goal of this article was to evaluate the efficiency of Linux operating system using statistical self-similarity and multifractal analysis. In order to collect the necessary data, thetools available in Linux such as vmstat, top and iostat were used. The measurement data collected witht hose tools had to be converted into a format acceptable by applications which analyze statistical selfsimilarity and multifractal spectra. Measurements collected while using the MySQL database systemin a host operating system were therefore analyzed with the use of statistical self-similarity and allowedto determine the occurrence of long-range dependencies. Those dependencies were analyzed with theuse of adequately graduated diagrams. Multifractal analysis was conducted with the help of FracLab application. Two methods were applied to determine the multifractal spectra. The obtained spectra were analyzed in order to establish the multifractal dependencies.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2014, 14, 3; 65-75
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expert systems as a tool supporting the assessment of the financial condition of business units
Autorzy:
Olszewska, Kinga
Powiązania:
https://bibliotekanauki.pl/articles/1075627.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
IT management systems
expert system
financial analysis
index analysis
Opis:
The ubiquitousness of information systems means that more and more areas of the company's activity are moving into the virtual sphere. IT systems take over most of the complicated tasks performed by people, which has a positive impact on time and costs incurred for the implementation of these tasks. One of the areas in which IT systems are used is the area of financial management, and thus the management of the financial condition of the unit. This article aims to test the suitability of expert systems as tools that can support the analysis and assessment of the financial condition of business units. The theoretical part discusses the essence of IT systems, theoretical foundations of expert systems and their advantages and disadvantages. The research part shows the use of an expert system to conduct the analysis of the financial condition of selected enterprises based on data from the financial statements of these units from 2015. The expert system provided information on the financial condition of selected companies. These results were compared with the results of the analysis carried out in the traditional way. This confirmed the author's assumption that it is possible to replace the financial analysis carried out with traditional methods by using a properly prepared expert system.
Źródło:
World Scientific News; 2019, 125; 114-126
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Group technology in context of the product classification
Autorzy:
Debnárová, L
Krchová, D
Kuric, I.
Powiązania:
https://bibliotekanauki.pl/articles/102868.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
group technology
classification system
coding system
cellular manufacturing
product analysis
cluster analysis
segmentation
capacity planning
Opis:
In the intensive competitive environment of the global economy, the survival of even the most well-established the world manufacturers depends on the ability to improve continuously quality while reducing costs. The resulting higher productivity is the key to market leadership and gaining sustainable competitive advantage. This paper outlines a group technology and classification of products which improve productivity, quality, inventory management of a company and reduce production times.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 21; 78-81
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Static stability analysis of power systems
Autorzy:
Konoval, V.
Prytula, R.
Skrypnyk, O.
Powiązania:
https://bibliotekanauki.pl/articles/376128.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
static stability
power system
modal analysis
Opis:
The developed modal method for analyzing oscillating static stability of power systems is based on eigenvalues and eigenvectors. As a mathematical model to the study we use a system of linearized differential equations that describe the behaviour of synchronous machines and their excitation systems during minor disturbances. This approach allows us to analyse the static stability of large power systems, evaluate stability margins, degree of damping modes, and set adjustment mechanism for mode parameters to improve mode stability. We investigated the impact of generator excitation system replacement on stability of Ukraine’s power system. The suggested modal analysis is implemented in the DAKAR software suite [1].
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2015, 82; 11-19
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synchronization of two forced double-well Duffing oscillators with attached pendulums
Autorzy:
Brzeski, P.
Karmazyn, A.
Perlikowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/280968.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
Duffing pendulum system
bifurcational analysis
synchronization
Opis:
We investigate the dynamics of two coupled Duffing oscillators with attached pendulums forced kinematically by a common signal. Our attention is focused on different kinds of synchronization which can appear in the considered system. Different types of coupling (spring, damper and spring and damper simultaneously) are taken into account. We show in a two-parameters space (amplitude and frequency of excitation) existence of complete and phase synchronization and asynchronous ranges.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 3; 603-613
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systemic Analysis of Politics in the Light of Reconstruction of Structural Functionalism of Jeffrey C. Alexander
Autorzy:
Nocoń, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/2020077.pdf
Data publikacji:
2021-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
political system
political analysis
functional explanation
Opis:
Applying systems analysis in political science research is still one of the important dimensions of political science methodology. Reconstruction of the functional model of the social system seems to be an attractive proposition for policy researchers. Signed by the name of Jeffrey Charles Alexander, the American version of neofunctionalism is one of the responses to the crisis of traditional forms of structural functionalism. The main purpose of the reconstruction of T. Parsons’s theory was its revitalization consisting in restoring the possibility of its application in contemporary social research. The reinterpretation of the classical approach was to a large extent “forced” by harsh criticism of the current approach and focused especially on attempts to overcome the limitations contained therein, which manifested in the impossibility of correlation of functional theorems with newly developing research currents Jeffrey Alexander restored relevance and emphasizes suitability for interpreting and explaining political processes and phenomena. Understanding the concept of functions and functional relations in the political environment allows for effective application in the analysis of contemporary political systems. Therefore, changing the method of functional analysis is a useful methodological tool in developing a political theory.
Źródło:
Polish Political Science Yearbook; 2021, 3 (50); 7-20
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart Cooling Controlled System Exploiting Photovoltaic Renewable Energy Systems
Autorzy:
Atieh, A.
Al Asfar, J.
Tawalbeh, N.
Shaqour, E.
Alsalhi, I.
Istaiteh, O.
Powiązania:
https://bibliotekanauki.pl/articles/123359.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
smart cooling system
solar system
energy management
cost analysis
Opis:
A smart cooling system to control the ambient temperature of a premise in Amman, Jordan, is investigated and implemented. The premise holds 650 people and has 14 air conditioners with the cooling capacity ranging from 3 to 5 ton refrigerant (TR) each. The control of the cooling system includes implementing different electronics circuits that are used to sense the ambient temperature and humidity, count the number of people in the premise and then turn ON/OFF certain air conditioner(s). The data collected by different electronic circuits are fed wirelessly to a microcontroller, which decides which air conditioner will be turned ON/OFF, its location and its desired set cooling temperature. The cooling system is integrated with an on-grid solar photovoltaic energy system to minimize the operational cost of the overall cooling system.
Źródło:
Journal of Ecological Engineering; 2018, 19, 2; 39-44
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation on selection of formwork systems in high rise buildings using regression analysis and their impacts on project success
Autorzy:
Rajeshkumar, Viswanathan
Sreevidya, V.
Powiązania:
https://bibliotekanauki.pl/articles/962264.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
deskowanie
system deskowania
analiza czynnikowa
korelacja
analiza regresji
formwork system
factor analysis
correlation
regression analysis
Opis:
The selection of the formwork system for high rise building affects the entire construction project duration and cost. The study reports the factors influencing the selection of different formwork system in the construction of high rise buildings through structural questionnaire survey from the client, contractor, consultant, and interviews with expert members. Total of 40 technical factors was identified from the literature and 220 filled questionnaires were received from the respondent. Relative Importance Index method is used to find the topmost factors affecting the selection of formwork system. Additionally, from factor analysis 22 factors were identified to have a correlation with one another. Regression analysis reveals that duration of the project, maintenance cost, adaptability, and safety have impact on formwork selection across time, cost and quality. These findings could potentially increase the construction company’s existing knowledge in relation to formwork selection.
Źródło:
Archives of Civil Engineering; 2019, 65, 2; 209-222
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of risk and failure scenarios in water supply system
Autorzy:
Boryczko, K.
Rak, J.
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069508.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
fault tree analysis
matrix methods
risk analysis
water supply system
Opis:
Water supply system is complicated technical system which belongs to underground urban infrastructure. Its accurate functioning determines everyday live stability of citizens. Risk analysis is a key phase of the process of water supply safety management. The aim of this paper is to present new propose of methods for risk of the first type (associated with quantity of supplied water) and the risk of the second type (associated with quality of supplied water) analyses in water supply system. The paper contains the description of matrix methods for risk analyses and methods describing cause-and-effect relationship of failure events (fault tree analysis).
Źródło:
Journal of Polish Safety and Reliability Association; 2014, 5, 2; 11--18
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MEASUREMENT OF HEALTHCARE SYSTEM EFFICIENCY IN OECD COUNTRIES
Autorzy:
Kujawska, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/452740.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
healthcare system efficiency
Data Envelopment Analysis
Opis:
Increased spending on healthcare systems in many countries tends to attract attention to their efficiency. The aim of this paper is to evaluate the efficiency of healthcare systems in the OECD countries and indicate causes of inefficiency by applying Data Envelopment Analysis (DEA) and using additive and super-efficiency models. The homogeneity of the sample is assessed and outliers are excluded. A ranking is established on the basis of efficiency scores. By means of DEA, fully efficient units are identified, forming a reference set (of best practice) for inefficient countries to follow.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2015, 16, 2; 23-32
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concept of expert system interpreting correctness of measurement and method of the EEG signal analysis for needs of the brain-computer interface
Autorzy:
Paszkiel, S.
Powiązania:
https://bibliotekanauki.pl/articles/378126.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
EEG signal
expert system
data analysis
Opis:
The concept of construction of the expert system interpreting correctness of measurement and the method of the EEG signal analysis for needs of the brain-computer interface (BCI) are described in the article. The general orientations related with the methodology of creating the expert systems based on the knowledge base (KB) are characterised. Also, the brain-computer interface technology was described, which has been recently gaining more and more popularity within the scope of its application in control processes.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 88; 209-216
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity Analysis and Optimization for Selected Supply Chain Management Issues in the Company – Using System Dynamics and Vensim
Autorzy:
Kasperska, Elżbieta
Mateja-Losa, Elwira
Marjasz, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/475034.pdf
Data publikacji:
2013
Wydawca:
Fundacja Upowszechniająca Wiedzę i Naukę Cognitione
Tematy:
System Dynamics
sensitivity analysis
optimization
Vensim
Opis:
The aim of our paper is to present the new results of research work on optimization and simulation for some logistic problems in the company. The System Dynamics (SD) method and the Vensim simulation language are applied in order to solve specific managerial problems described by Forrester in the model of supply chain. The historical model of Customer-Producer-Employment System by Forrester (Forrester, 1961) has not been examined with the sensitivity analysis, from the “automatic” testing perspective. Optimization experiments have not been conducted, either. It is surprising, since the model is old and widely known. The opportunities offered by the Vensim language allow us to perform such analysis. The visualization called “confidence bounds“ is used, to show the behaviour of chosen variables over a period of time. The Monte-Carlo method is applied for sampling a set of numbers from within bounded domains (distribution for each searching parameters is specified). The authors of this paper conducted numerous experiments in this scope. This paper presents their results and offers some conclusions formulated at the end.
Źródło:
Journal of Entrepreneurship, Management and Innovation; 2013, 9, 2; 29-44
2299-7075
2299-7326
Pojawia się w:
Journal of Entrepreneurship, Management and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factor Analysis as a Means of Filtering Rams Indicators for Railway Vehicles
Autorzy:
Sitarz, Marek
Chruzik, Katarzyna
Graboń-Chałupczak, Marzena
Powiązania:
https://bibliotekanauki.pl/articles/503756.pdf
Data publikacji:
2017
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
Maintenance Management System RAMS
factor analysis
Opis:
European Commission Regulation (EU) No. 445/2011 regarding the system of certification for entities in charge of maintenance (ECM) of freight wagons requires such entities to supervise the condition of wagons, without specifying the methods of supervision to be used. Each ECM should establish a Maintenance Management System (MMS), which will include the obligation to monitor the fleet of freight wagons. Monitoring railway vehicle maintenance operations should include tracking all significant technical and operational indicators. The key question is which indicators are the have the greatest impact on safety. This paper discusses some issues related to the monitoring of maintenance operations for railway vehicles. It also looks at dedicated solutions for entities in charge of the maintenance for freight wagons based on PN-EN 50126:2002 standard and RAMS indicators (Reliability, Availability, Maintainability and Safety). This paper describes factor analysis of the proposed indicators as a means of selecting those that have a decisive impact on the correctness of the process for monitoring vehicles. This paper shows an example of the implementation of the requirements of the European Commission Regulation 445/2011 [3] regarding the monitoring of the state of railway vehicles and the possibility of using the information so gained as part of a process of continuous improvement. Reducing the number of indicators will reduce the amount of data needed to calculate all the RAMS indicators, without compromising the benefits of the rail vehicle monitoring system.
Źródło:
Logistics and Transport; 2017, 36, 4; 105-112
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinematic and dynamic analysis of new polar positioning system dedicated to mechatronic laser glass engraving system
Autorzy:
Trochimczuk, R.
Powiązania:
https://bibliotekanauki.pl/articles/955248.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
system pozycjonowania
analiza kinetyczna
analiza dynamiczna
polar positioning system
kinematic analysis
dynamic analysis
laser glass engraving
Opis:
Analytical formulas describing the kinematics and dynamics of a multibody system of a new polar positioning system dedicated to mechatronic laser glass or other transparent dielectrics engraving system will be presented in this work. The analytical results will become in the later stages of the research the basis of numerical simulations. They will optimize the proposed solution of the positioning system.
Źródło:
International Journal of Applied Mechanics and Engineering; 2014, 19, 4; 771-781
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of the conditions of an enterprise effectiveness assessment formation
Autorzy:
Malinowska, K.
Piontek, J.
Cyplik, P.
Powiązania:
https://bibliotekanauki.pl/articles/409310.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
activity assessment
enterprise effectiveness
economic analysis
financial analysis
technical-economic analysis
logistic system
Opis:
The enterprise assessment is used to verify its activity and is a point of departure to make future decisions. The assessment quality depends on its executor’s knowledge, experience and capabilities. Enterprises have adopted an assessment performance method based on their needs and activity specifics. In the ever changing environment the applied enterprise assessment algorithm should be progressively improved. The present enterprise assessment satisfies its basic needs but is not sufficient. The assessment should be enriched by a number of elements that will consider the enterprise logistic system multidimensionality. Numerous factors and their mutual relations should be taken into account in the assessment. This makes it necessary to form a pattern of the enterprise assessment algorithm that would function as a guide.
Źródło:
Research in Logistics & Production; 2017, 7, 2; 67-75
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multivariate Analysis of Regional Differences in the Higher Education System in Poland
Analiza wielowymiarowa różnic regionalnych w Polsce pod względem szkolnictwa wyższego
Autorzy:
Ordon, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/905678.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
level of the higher education system
factor analysis
cluster analysis
Opis:
This article discusses an attempt at analysis of regional diversity in Poland in 2001 with respect to the level of the higher educational system. The first part of this report deals with ranking provinces with respect to the level of the higher educational system, measured by a synthetic variable. This variable is the result of 10 characteristics, weighted according to their influence on higher education. Selection of those characteristics was dictated by their use by experts as well as their availability in regional statistics data. In the second part of the article, the author presents dusters formed by provinces in two-dimensional areas: the first dimension indicates the level of higher educational system whereas the other dimension describes the socio-economic situation in the regions. This situation is represented by factors that have been singled out (by principal component analysis) as key among 21 characteristics, which potentially influence the higher educational system. The discovery of commonalities according to which those clusters are formed is the main purpose of the article.
Artykuł jest próbą analizy zróżnicowania regionalnego Polski w 2001 r. pod względem szkolnictwa wyższego. W pierwszej części artykułu opisany jest proces hierarchizacji województw pod względem poziomu szkolnictwa wyższego. Za miarę tego poziomu przyjęto zmienną syntetyczną, będącą średnią ważoną z 10 cech mogących świadczyć o poziomie szkolnictwa wyższego. Przy wyborze tych cech kierowano się zarówno ich zastosowaniem przez ekspertów, jak i dostępnością danych w statystyce regionalnej. W drugiej części artykułu autor przedstawia grupowanie województw w dwuwymiarowych przestrzeniach, gdzie pierwszy wymiar to poziom szkolnictwa wyższego, drugi natomiast opisuje sytuację społeczno-gospodarczą w regionach. Sytuację tę reprezentują czynniki wyodrębnione w analizie głównych składowych spośród 21 cech mających potencjalny wpływ na kształtowanie się szkolnictwa wyższego. Celem artykułu jest wykrycie prawidłowości, według których tworzą się te skupiska.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2006, 196
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Features of the content-analysis method for text categorization of commercial content in processing online newspaper articles
Autorzy:
Vysotska, V.
Chyrun, L
Powiązania:
https://bibliotekanauki.pl/articles/118191.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
computer linguistic system
text analysis
text synthesis
content system management
Opis:
This paper presents the features of text categorization of commercial content in linguistic modelling. Description of syntax sentence modelling is applied to automate the processes of analysis and synthesis of texts in natural language for commercial content categorization. This article suggests methods of content analysis for online newspaper. The model describes the processing of information resources systems of content analysis and simplifies the technology of content management system automation. General problems of syntactical and semantic content analysis and functional services of content management system are analysed.
Źródło:
Applied Computer Science; 2015, 11, 1; 15-30
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of the Integrated Zone Comparison Technique (IZCT) with Various Scoring Systems in a Mock Crime Experiment by Students
Autorzy:
Gordon, Nathan J.
Fleisher, William L.
Powiązania:
https://bibliotekanauki.pl/articles/523237.pdf
Data publikacji:
2012
Wydawca:
Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
Tematy:
Integrated Zone Comparison Technique (IZCT)
Data Analysis, Horizontal Scoring System (HSS)
3-Point Manual Scoring System
7-Point Manual Scoring System
Validity
Polygraph Validation Test (PVT)
Źródło:
European Polygraph; 2012, 6, 1(19); 5-17
1898-5238
2380-0550
Pojawia się w:
European Polygraph
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary results of a system-theoretic assessment of maritime autonomous surface ships’ safety
Autorzy:
Wróbel, K.
Krata, P.
Montewka, J.
Powiązania:
https://bibliotekanauki.pl/articles/117567.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Maritime Autonomous Surface Ships (MASS)
autonomous ship
MUNIN project
Advanced Autonomous Waterborne Application (AAWA)
System-Theoretic Process Analysis (STPA)
System-Theoretic Accident Model and Process (STAMP)
unmanned shipping system
safety at sea
Opis:
While a system-theoretic approach to the safety analysis of innovative socio-technical systems gains a growing acceptance among academia, safety issues of Maritime Autonomous Surface Ships (MASS) remain largely unexplored. Therefore, we applied a System-Theoretic Process Analysis to develop and analyze a preliminary model of the unmanned shipping system in order to elaborate safety recommendations for future developers of the actual system. Results indicate that certain advancements shall be undertaken in relation to MASS’ software solutions in particular.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 717-723
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A computational fluid flow analysis of a disc valve system
Autorzy:
Czop, P.
Śliwa, P.
Gniłka, J.
Gąsiorek, D.
Wszołek, G.
Powiązania:
https://bibliotekanauki.pl/articles/244640.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
valve system
computational fluid flow analysis
simulation
Opis:
Noise concerns in shock absorbers can be divided into two categories. The first is fluid flow noise, or “swish noise”, caused by the oil being forced through openings in the valves. The type and temperature of the oil, its velocity and the orifice geometry all have an effect on this. In addition, the structural design of the shock absorber shell may either reduce or amplify the noise. The second type of shock absorber noise is often described as regular operational noise or “chuckle noise”. It can be observed in vehicles during low-displacement, higher-frequency events, such as driving over a slightly rough road. This effect measurable as a force discontinuity into the vehicle and can come from a number of sources in the shock absorber, e.g. hydraulic transitions. It is often traceable to the valve discs closing and opening, but can also be caused by cavitation/aeration in the oil and air being pulled through the valves. The work on noise improvement reported in this paper has been started using conventional shock absorbers to be extended and will cover in the future variable damping shock systems as well. The paper gives an overview about the configurations of a typical valve system including three basic regimes of operation, which correspond to the amount of oil flowing through a valve cavity. The aim of this work was to propose a finite element fluid flow model, which can be used in order to reduce the velocity of fluid flow through a cavity of a shock absorber valve. High flow velocity can cause high-content frequency vibrations and, in turn, audible noise. The model will be used for initial screening of new valve concepts and on the other hand to improve the currently use ones.
Źródło:
Journal of KONES; 2011, 18, 1; 117-122
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of the linear form of dynamical equations of the satellite attitude control system for its analysis and synthesis
Autorzy:
Moldabekov, Meirbek
Sukhenko, Anna
Shapovalova, Darya
Yelubayev, Suleimen
Powiązania:
https://bibliotekanauki.pl/articles/1839688.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
synthesis
stability analysis
attitude control system
satellite
Opis:
At present, the methods based on using linearized dynamical equations are applied for syn- thesis of an attitude control system of a satellite with nonlinear dynamics. Linearized equa- tions describe the satellite dynamics approximately, which is the main their disadvantage. This article shows that basing on the angular momentum theorem, the nonlinear dynamical equations of the satellite attitude control system can be represented in the form of linear differential equations with variable coefficients, which makes it possible to use engineering methods of stability analysis and analysis of transient quality in the process of synthesis of the satellite attitude control system.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 1; 109-120
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis in the water distribution system
Autorzy:
Tchórzewska-Cieślak, B.
Powiązania:
https://bibliotekanauki.pl/articles/2069656.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk analysis
failure
risk
water distribution system
Opis:
A water distribution system (WDS) ought to be high reliable continuous operating system. Failure factors in WDS should be identified and prioritised, for example, the causing factors in the most frequent failures in water-pipe network. In this paper, the failure risk analysis of the WDS is presented, and accordingly, a New method consisting the failures index (FI) and the evaluation of risk of failure within the relevant area, based on the assumed categories (tolerable, controlled and unacceptable risk). It is expecting that the methodology for the WDS performance risk analysis would provide the city leadership for decision making support.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 247--254
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical thermal analysis of a car braking system
Autorzy:
Różyło, P.
Powiązania:
https://bibliotekanauki.pl/articles/102377.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Abaqus
braking system
numerical analysis
temperature distribution
Opis:
The study involved performing a numerical thermal analysis of selected components in a car braking system. The primary goal of the study was to determine the regions which are most susceptible to variations in temperature, and to determine the degree of thermal impact upon them. The analysis was performed using the Abaqus environment. The examined components of the braking system were made of materials reflecting mechanical properties of the real subassemblies. The FEM analysis enabled determination of the distribution of temperature in the system with respect to the properties of the investigated materials and applied boundary conditions.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 2; 38-43
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Elaboration of the Method of Fatigue Testing of the Rotor of the Mosups Plane Propulsion System
Autorzy:
Głowacki, D.
Rodzewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/97933.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
UAV
propulsion system
stress analysis
fatigue tests
Opis:
This paper concerns fatigue testing of the rotor of the propulsion system for the MOSUPS – an unmanned aircraft designed in a joint wing configuration, and equipped with a ducted propeller. The work presents the analysis of the stresses and deformations of the rotor structure as well as the form of the loading cycle. The aim of the paper is to introduce the concept of a simplified method of fatigue testing of multi-blade rotors. With the sophisticated geometry of the rotor in mind – the authors applied the FEM tools and implemented the ANSYS and nCode programs. The prototype of the fatigue stand built by the authors is also presented in the paper.
Źródło:
Fatigue of Aircraft Structures; 2016, 8; 97-103
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The international GIS day – analysis of celebrations in Poland and its importance to geographic education
Autorzy:
Kunz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2084600.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Polska
geographic education
GIS system
geoinformation
analysis
Opis:
Geographic Information Systems were classified as one of the most important technological „inventions” of the 20th century for geography. GIS, as the content of lectures, and later as a university subject, was introduced at Polish universities and colleges relatively late - only at the beginning of the 1990s. At first, it was an extension of the content scope discussed within the framework of cartography and topography, and only later - as independent lectures and practical classes. An excellent supplement to the content of lectures and practical workshops, as well as an indication of proper students' attitudes towards geoinformation is the International GIS Day organized every year in November for more than 10 years in Poland and worldwide. The objective of this event is to popularize the knowledge about geoinformation systems and their broad applications. The first celebration of this day took place on the 18th of November 1999 in several countries at the same time, and the proposed theme - 'application of GIS is limited only by the imagination of people who use it' - remains valid until now. Since the first shows, one can observe an increasing number of countries and academic, institutional and commercial centres introducing the modern geography to all who are interested in it through this open and interesting form. The research aimed at analysing the previous celebrations of the GIS Day in Poland (2000-2010), as well as making an attempt to determine the significance of this form of sharing the knowledge and skills in geographic education.
Źródło:
Prace i Studia Geograficzne; 2011, 48; 197-209
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on an Innovative FLEX Bicycle Frame with a Softtail Vibration Damping System
Autorzy:
Kuczek, Łukasz
Marczak, Paweł
Muzykiewicz, Wacław
Mroczkowski, Marcin
Paćko, Paweł
Drop, Dawid
Powiązania:
https://bibliotekanauki.pl/articles/2201887.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
elastomer
bike frame
FLEX bike frame
damping system
strength analysis
fatigue analysis
impact test
softtail damping system
Opis:
Bicycles are gaining more and more popularity, especially in crowded cities where there is a problem with traffic jams and a limited number of parking spaces. The bicycles are also often used by mountain bikers during riding on off-road trails. In both cases, the important parameters are the stiffness of the bicycle frame, the weight of the bicycle, but also driving comfort. To improve comfort and reduce vibrations in the bicycle frame both front and rear shock absorbers are used. The use of traditional shock absorbers increase the weight of the bike and its price. The work characterizes a modern damping system, Softtail type, designed by AG Motors. In this case, the damping element (elastomer) was placed directly in the rear fork. Analyses of polyurethanes of various hardness were carried out in terms of the possibility of using them as a vibration damper. A numerical and experimental analysis of the bicycle frame was performed, adapted to the a new shock-absorber system. Strength, fatigue and impact tests were carried out in accordance with the relevant bicycle standards. Research has shown that the frame bicycle with the Softtail system, meets the requirements of the standards.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 290--303
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided operation cost prediction of complex technical systems with reserve and improved components
Autorzy:
Kołowrocki, K.
Mazurek, J.
Soszyńska-Budny, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069546.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
complex technical system
operation process optimization
operation cost analysis
improved system
Opis:
There is presented the computer program based on methods and algorithms for prediction of the operation cost of the complex technical system in variable operation conditions. The program allows to determine of the costs of the non-repairable and repairable improved complex technical systems before and after their operation processes optimization. The procedure of the computer program use and its application to operation cost analysis of the exemplary complex technical system.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 2; 345--360
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical situations and human resources in discrete transportation systems analysis
Autorzy:
Walkowiak, T.
Mazurkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069570.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
discrete transportation system
system dependability
critical situations analysis
Monte-Carlo simulation
Opis:
The paper presents an approach to critical situations analysis related to discrete transportation systems (DTS). The critical situation is understood as sudden shortage of some system recourses resulting in the transportation system performance degradation. The analysis is realized based on availability calculation of DTS. The system is described by the formal model, which includes reliability and functional parameters of DTS as well as human resources – drivers and management system. The availability and average availability of the system, defined in a functional way, is discussed as a function of different essential parameters of DTS. The proposed analysis is based on the modelling and simulating of the system behaviour using Monte-Carlo approach. The paper presents some exemplar systems – based on real Polish Post DTS – modelling and results.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 1; 205--216
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modernization of the outflow system of cross-flow turbines
Autorzy:
Kaniecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/1931595.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
cross-flow turbine
CFD analysis
outflow system
Opis:
The presented article brings general overview of CFD analysis of two cross-flow turbine types (a classical impulse turbine and a reaction turbine). The author focuses his attention mainly on the discussion of differences in flow patterns in the outflow section of these turbines, because this element exerts significant impact on performance properties of the turbine. The article presents a comparison of computations and experimental results of the cross-flow turbine manufactured by IMP PAN. The analysis was performed by means of a computer program FLUENT for a two-dimensional example.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 4; 601-608
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods for integrated Failure Risk Analysis of Water Network in terms of Water Supply System Functioning Management
Autorzy:
Tchórzewska-Cieślak, B.
Pietrucha-Urbanik, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068882.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
water supply system
failure indicators
risk analysis
Opis:
In the paper the issues connected with failure risk analysis related to the functioning of this system were presented. In the analysis of water supply system it is important to assess the safety of its operation, both from the producer and the consumer point of view. The paper presents the method of analysis of consumers acceptance of water costs that companies bear for the risk reduction. The proposed method can be the basis of comprehensive program of risk failure management and in decision-making on water supply operation.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 1; 157--166
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity analysis of an identification method dedicated to nonlinear systems working under operational loads
Analiza wrażliwości metody identyfikacji układów nieliniowych w warunkach eksploatacyjnych
Autorzy:
Iwaniec, J.
Powiązania:
https://bibliotekanauki.pl/articles/281049.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
sensitivity analysis
nonlinear system identification
operational loads
Opis:
In the paper, the exploitational nonlinear systems identification method based on algorithms of the restoring force, boundary perturbations and direct parameter identification methods is presented. The obtained parameter estimates provide information concerning forces transferred on the foundation and find application in the model-based diagnostics. The results of the sensitivity analysis carried out in order to assess the influence of input parameters uncertainties (accuracy of resonant frequency and amplitude estimates, errors of transfer function estimation in operational conditions, value of introduced additional mass) on the accuracy of estimated system parameters are also presented.
W pracy przedstawiono metodę operacyjnej identyfikacji parametrów modeli nieliniowych konstrukcji mechanicznych, realizowaną w oparciu o algorytmy metody sił resztkowych, zaburzeń brzegowych oraz bezpośredniej identyfikacji parametrów. Uzyskane estymaty parametrów dostarczają informacji o siłach przekazywanych na pod- łoże i znajdują zastosowanie w diagnostyce realizowanej w oparciu o model układu nieuszkodzonego. W celu oszacowania wpływu niepewności parametrów wejściowych na dokładność estymowanych parametrów układu, przeprowadzono analizę wrażliwości poszukiwanych parametrów układu (masy, sztywności, tłumienia) na dokładność estymacji częstotliwości i amplitud rezonansowych (uwarunkowaną błędami estymacji funkcji przejścia w warunkach eksploatacyjnych), a także wartość masy wprowadzanej do układu w celu zmodyfikowania jego własności dynamicznych (zgodnie z algorytmem metody zaburzeń brzegowych).
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 2; 419-438
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of multi-criteria analysis based on individual psychological profile for recommender systems
Autorzy:
Rafalak, M.
Granat, J.
Wierzbicki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/305393.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
recommender system
multi-criteria analysis
user profiling
Opis:
This paper presents a novel approach for user classification exploiting multi- criteria analysis. This method is based on measuring the distance between an observation and its respective Pareto front. The obtained results show that the combination of the standard KNN classification and the distance from Pareto fronts gives satisfactory classification accuracy – higher than the accuracy ob- tained for each of these methods applied separately. Conclusions from this study may be applied in recommender systems where the proposed method can be implemented as the part of the collaborative filtering algorithm.
Źródło:
Computer Science; 2016, 17 (4); 503-517
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System for analysis and correction of motor management
Autorzy:
Puškár, Michal
Kopas, Melichar
Šoltésová, Marieta
Lavčák, Matúš
Powiązania:
https://bibliotekanauki.pl/articles/2134857.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
system
analysis
correction
motor
analiza
korekta
silnik
Opis:
The innovative system, which was developed for analysis and correction of motor management, is determined for the solution of practical problems concerning the operation of the piston combustion engines. Programming of the ignition curves and fuel maps without relevant feedback, namely, without information obtained from the engine operation, increases the risk of detonation combustion, which can destroy the combustion engine. However, the main application area of this system is the development of an algorithm, which is specified for control of the combustion process based on the HCCI technology (Homogenous Charge Compression Ignition). Nowadays, the functional principle of the HCCI engine is one of the most effective possibilities on how to reach higher operational efficiency of the gasoline engine, that is, closer to the efficiency level of the diesel driving units.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 111; 129--136
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sustainable development in waste management- analysis of waste collection system in the city of Częstochowa
Zrównoważony rozwój w gospodarce odpadami – analiza systemu zbiórki odpadów w mieście Częstochowa
Autorzy:
BRZESZCZAK, Adam
IMIOŁCZYK, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/550501.pdf
Data publikacji:
2016
Wydawca:
Wyższa Szkoła Biznesu i Przedsiębiorczości w Ostrowcu Świętokrzyskim
Tematy:
sustainable development
waste management
analysis of waste management system
zrównoważony rozwój
zarządzanie odpadami
analiza systemu gospodarki odpadami
Opis:
The elaboration below raises a subject of the sustainable development. The term is used more frequently in relation to the ever growing interest in environmental protection, in which the substantial role in its implementation have state and local authorities. Currently, the methods of reducing the adverse effects on natural environment are more frequently introduced and assisted by the sustainable development to a large extent. The present study consists of the analysis of waste management system in the city of Częstochowa within the context of the sustainable development.
W poniższym opracowaniu poruszona została tematyka zrównoważonego rozwoju. Pojęcie to jest coraz częściej rozpatrywane wraz z rosnącym zaintereso-waniem ochroną środowiska, a znaczącą rolę w jego implementacji odgrywają wła-dze państwowe i samorządowe. Obecnie stosowanie metod zmniejszających nieko-rzystny wpływ odpadów na środowisko naturalne jest coraz bardziej powszechne, a zrównoważony rozwój w znacznym stop-niu je wspomaga. W niniejszej pracy prze-nalizowano system gospodarki odpadami w mieście Częstochowa w kontekście zrów-noważonego rozwoju.
Źródło:
Acta Scientifica Academiae Ostroviensis. Sectio A, Nauki Humanistyczne, Społeczne i Techniczne; 2016, 8(2)/2016; 33-46
2300-1739
Pojawia się w:
Acta Scientifica Academiae Ostroviensis. Sectio A, Nauki Humanistyczne, Społeczne i Techniczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided prediction of complex technical systems operation cost
Autorzy:
Kołowrocki, K.
Mazurek, J.
Soszyńska-Budny, J.
Powiązania:
https://bibliotekanauki.pl/articles/2069547.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
complex technical system
operation process optimization
operation cost analysis
transportation system
Opis:
There is presented the computer program is based on methods and algorithms for prediction of the operation cost of the complex technical system in variable operation conditions. The program allows to determine of the costs of the non-repairable and repairable complex technical systems before and after their operation processes optimization. The procedure of the computer program use and its application to operation cost analysis of the port oil transportation system are given.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 2; 337--344
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of observatories in the integrated transport safety systems
Autorzy:
Żukowska, J.
Krystek, R.
Powiązania:
https://bibliotekanauki.pl/articles/360555.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
transport safety system
safety observatory
road safety analysis
safety information system
Opis:
Accurate knowledge about the causes, circumstances and place of transport accidents is the prerequisite to take the correct action to improve transport safety. Developing appropriate organizational structures, forms and methods of management and implementation of safety measures in the sectoral approach condition the success. Therefore, the Safety Information System is one of the integral areas of the Integrated Transport Safety System ZEUS.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 2; 191-195
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logistics Systems Maintenance Modelling Problems - the Use of TDA Approach
Autorzy:
Werbińska-Wojciechowska, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/503872.pdf
Data publikacji:
2012
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
time-delay analysis
logistics system performance inspection model
Opis:
The article presents an overview of some recent developments in the area of mathematical modelling of maintenance decisions with the use of time-delay and time-delay analysis. Thus, the literature overview in the investigated area is provided. The problem of time relations occurred in supply chain performance process is investigated. Later, there are presented obtained reliability analysis results in comparison with the knowledge about the case company present con-dition. The article investigates the possibilities of basic time delay model implementation in the area of logistic sys-tem of sixteen forklifts performance analysis.
Źródło:
Logistics and Transport; 2012, 15, 2; 63-74
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An evaluation of the use of expert systems in economics
Autorzy:
Sonnet, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/518250.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Gdański. Wydział Ekonomiczny
Tematy:
expert system
artificial intelligence
economic modelling
SWOT analysis
Opis:
This article presented the hypothesis that expert systems can extend traditional economic modelling. Before this hypothesis was examined, expert systems were specified and example swere given. Expert systems use a knowledge base, often of the form of “if A, then B” rules. It has been highlighted that expert systems have not as often been applied in economics as in other disciplines, like medicine or business science. A SWOT analysis for the stated hypothesis was conducted. Based on this qualitative analysis, the hypothesis was not rejected. An expert system for supporting inflation forecasts will be built in the nearer future.
W niniejszym artykule postawiono hipotezę, że system ekspercki może rozszerzyć tradycyjne podejście modelowe w ekonomii, a także, że systemy te z powodzeniem możemy zastosować do problemów ekonomicznych. Zanim przetestowano hipotezę przedstawiono przykłady zastosowań systemu eksperckiego oraz wykazano, w jaki sposób korzysta ów system z bazy wiedzy. System ten w wielu przypadkach opiera się na warunku, „jeżeli A to B”. Zaznaczono także, że stosowanie systemu eksperckiego jest nieporównywalnie mniej popularne w ekonomii niż w medycynie czy w praktyce biznesowej. Przeprowadzono analizę SWOT w celu weryfikacji hipotezy. Wyniki analizy jakościowej nie pozwalają odrzucić hipotezy, system ekspercki pozwala zmniejszyć niepewność zmiennych ekonomicznych, gdy tylko dostarczymy jemu rzetelną bazę wiedzy. System ekspercki także pomógłby w prognozowaniu inflacji, dlatego ciekawym rozwinięciem powyższych rozważań byłaby budowa systemu eksperckiego wspomagająca prognozowanie inflacji.
Źródło:
Zeszyty Studenckie Wydziału Ekonomicznego „Nasze Studia”; 2017, 8; 190-199
1731-6707
Pojawia się w:
Zeszyty Studenckie Wydziału Ekonomicznego „Nasze Studia”
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power system participation factors for real and complex eigenvalues cases
Autorzy:
Konoval, V.
Prytula, R.
Powiązania:
https://bibliotekanauki.pl/articles/376120.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
modal analysis
participation factor
static stability
power system
Opis:
This paper provides a brief overview on existing approaches for defining participation factor in modal analysis. We calculated participation factors using different approximations and specific examples, and then compared the obtained results with equations derived from the mode evolution. As a result, the existing methods for determining a state variable participation factor in mode are proved incorrect result for complex eigenvalue case. Modem software applications designed to analyze power system stability deploy old approaches that provide incorrect results of modal analysis and pose risks to the operation of real power systems. To solve this problem we presented a new broadened definition of participation factor that assures correct results for real and complex eigenvalues cases. We used a two-mass mechanics system to validate proposed approach and our findings confirm the proposed participation factor theory.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2017, 90; 369-381
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Participation factor in modal analysis of power systems stability
Autorzy:
Konoval, V.
Prytula, R.
Powiązania:
https://bibliotekanauki.pl/articles/376278.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
modal analysis
participation factor
static stability
power system
Opis:
This paper provides a brief overview on existing approaches for defining participation factor in modal analysis which characterizes the interaction between modes and state variables of power system. We calculated participation factors using different methods and compared the results obtained with the expressions derived from mode evolution. For cases of complex eigenvalues of linear differential equations characteristic matrix it was discovered incorrect existing approaches for defining participation factor of state variable in mode. Modern software applications designed to analyze power system stability widely deploy the approaches discussed that provide incorrect results of modal analysis and pose risks to the operation of real power systems. Therefore the problem of calculating the participation factor remains as important as ever.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2016, 86; 97-104
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Supporting decisions on the Forex market using fuzzy approach
Autorzy:
Juszczuk, Przemysław
Kruś, Lech
Powiązania:
https://bibliotekanauki.pl/articles/384399.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
trading system
Forex
fuzzy membership function
multicriteria analysis
Opis:
A new concept of the multicriteria fuzzy trading system using the technical analysis is proposed. The existing trading systems use different indicators of the technical analysis and generate buy or sell signal only when assumed conditions for a given indicator are satisfied. The information presented to the trader – decision maker is binary. The decision maker obtains a signal or no. In comparison to the existing traditional systems called as crisp, the proposed system treats all considered indicators jointly using the multicriteria approach and the binary information is extended with the use of the fuzzy approach. Currency pairs are considered as variants in the multicriteria space in which criteria refer to different technical indicators. The introduced domination relation allows generating the most efficient, non‐dominated (Pareto optimal) variants in the space. An algorithm generated these non-dominated variants is proposed. It is implemented in a computer‐based system assuring the sovereignty of the decision maker. We compare the proposed system with the traditional crisp trading system. It is made experimentally on different sets of real‐world data for three different types of trading: short‐term, medium and long‐term trading. The achieved results show the computational efficiency of the proposed system. The proposed approach is more robust and flexible than the traditional crisp approach. The set of variants derived for the decision maker in the case of the proposed approach includes only non‐dominated variants, what is not possible in the case of the traditional crisp approach. The reservation point and its impact on the overall results are measured with the use of the sensitivity analysis.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 2; 50-62
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and optimisation of the steering kickback performance
Symulacja i optymalizacja drgań typu kickback koła kierownicy samochodu
Autorzy:
Szczotka., M.
Powiązania:
https://bibliotekanauki.pl/articles/280887.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
steering system vibrations
driver's comfort
optimisation
dynamic analysis
Opis:
An application of nonlinear optimisation methods to select some parameters of a passenger car steering system is presented. A simplified planar model of the system as well as spatial multibody models are developed. The simplified model is used in the optimisation task, ensuring minimisation of vibrations of the steering wheel. The optimisation task is solved in two stages. The first one allow us to obtain optimal geometry of the system. In the second stage, nonlinear characteristics of some elements are obtained. The correctness of optimisation results is verified by the application of a more sophisticated spatial model. An own simulation programme has been worked out. It allowed us to perform dynamic analysis of the steering kickback using both simplified and complex structural models as well as to execute a built-in optimisation module. Asymmetric input forces applied to the wheel centre have been used in the computer simulations. The excitations analysed are typical for a car moving over an obstacle. The work presented concentrates on the steering kickback phenomena, which may strongly influence discomfort perceived by the car driver.
W pracy przedstawiono zastosowanie metod optymalizacji do doboru pewnych parametrów układu kierowniczego samochodu osobowego. Przedstawiono zarówno uproszczony, płaski model układu, jak również jego wersję przestrzenną. Model uproszczony wykorzystano w zadaniach optymalizacji, których celem jest minimalizacja drgań przenoszonych na koło kierownicy w wyniku jazdy po nierównej nawierzchni. Zadanie optymalizacji jest rozwiązane w dwóch etapach. W pierszym poszukiwano optymalnej geometrii układu. Nieliniowe charakterystyki układu są znajdywane w drugim etapie. Wyniki optymalizacji zostały następnie zweryfikowane w złożonym modelu układu. Własne oprogramowanie pozwala na przeprowadzanie analiz z zastosowaniem obu modeli oraz dokonywania obliczeń optymalizacyjnych. Analizowano wpływ sił dynamicznych chrakterystycznych dla przejazdu przez przeszkodę kołami jednej strony pojazdu. Wyniki obliczeń koncentrują się na drganiach typu kickback, które są jednym z czynników znacznie wpływających na dyskomfort kierowcy.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 1; 187-208
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of principal component analysis for optimization of a system operation assessment criteria set
Autorzy:
Muślewski, Ł.
Knopik, L.
Powiązania:
https://bibliotekanauki.pl/articles/247903.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
quality
criteria
transport system
analysis
canonical correlations
optimization
Opis:
The analysis of results of experimental tests and a literature survey of the issue reveal that the subject matter connected with determination of the optimal number of a given transportation system operation assessment criteria has a direct influence on the result of the considered assessment. The analysis was made within the research on operation quality of a selected transportation system. In order to optimize the analysed system assessment criteria, a theoretical description has been made and an example of canonical correlations application has been presented. Analysis of canonical correlations involves determination of linear combination parameters of the studied sets so that the obtained correlation coefficient will have maximal value. In the successive step, the next pair of linear combination are not correlated with the combinations determined in the first step. The determined correlations can measure the power of relation between two sets of variables and are useful in the process of choosing significant criteria for a given research object operation quality assessment.
Źródło:
Journal of KONES; 2013, 20, 4; 307-312
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gender Recognition System Based on Human Face Picture
Autorzy:
Mazurkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/2068922.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
gender recognition
human face
safety system
picture analysis
Opis:
The paper presents the analysis and discussion of gender recognition based on human face picture. The research combines different features selection techniques with the set of softcomputing classifiers. We are looking for not very complicated, fast and sensitive approach to create the theoretical basis for real safety systems where the correct “on-line” gender recognition is necessary. We start from the already known differences between the female and male face. This is the key point to tune the preprocessing mechanisms. We propose the quite classic classifiers, but we focus on sensible correlation between the feature extraction and the actual classification. The significant set of the results are discussed and the best solutions are pointed. All tests were realised based on the well known base of face pictures with added set of our own collection. The proposed solution can be an essential tool for the monitoring systems, safety guards and systems to point the dangerous situations based on video data.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 1; 97--104
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis for an optimization of a powered roof support operating in hazard conditions of minig tremors
Autorzy:
Szurgacz, D.
Powiązania:
https://bibliotekanauki.pl/articles/89179.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
hydraulic leg
performance
hydraulic system
numerical analysis
modelling
Opis:
The article presents an optimization of Ø0.21/0.16 hydraulic leg system operating in a powered roof support Glinik 13/25 Pp type, working at longwall 6, seam 501, KWK Bobrek – Centrum - in hazard conditions of mining tremors. The process included numerical modelling and computer software, ANSYS CFX. The optimization allows to achieve an adequate capacity and performance of the hydraulic system which increases workplace safety in the mines. The article provides basic requirements that must be provided in order to conduct an analysis in ANSYS CFX. The software was used to carry out 10 simulations, which allowed to determine an optimal flow for the subject leg.
Źródło:
Mining Science; 2015, 22, Special Issue 2; 171-179
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the efficiency of complex systems
Autorzy:
Antkowiak, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/747836.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
performance analysis
complex system
continuous-time Markov chains
Opis:
The subject of considerations shall be mathematical models describing the fluctuation of states of complex systems. The purpose of this work is to give a defined system (considering failures, activation process, and a possibility of repair), its description along with the basic indications of multi-level system analysis, and in particular the definition of steady-state probabilities and performance analysis. The modeling tool here are continuous-time Markov chains with finite number of states
Źródło:
Mathematica Applicanda; 2017, 45, 2
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
METHODS OF DETERMINING THE PREFERENCE FOR PURPOSES OF THE CONSTRUCTION OF THE COMPUTERISED DECISION SUPPORT SYSTEM
Autorzy:
Becker, Aneta
Becker, Jaroslaw
Powiązania:
https://bibliotekanauki.pl/articles/453485.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
analysis and preference determination methods
decision support system
Opis:
The article presents the functionality of preference modelling for purposes of the multi-methodical, multi-criteria decision analysis implemented in the computerised decision support system. Research results can be considered through the prism of preference: authoritatively determined by the decision maker or democratically by the group of beneficiaries and from the perspective of scientific views of the council of experts. Preferences in the system can be determined using several different methods.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2014, 15, 2; 273-283
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decision Analysis in Project Management Process
Autorzy:
Kramarenko, S.
Shevtshenko, E.
Karaulova, T.
Wang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/971105.pdf
Data publikacji:
2008
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
intelligent decision support system
project management
decision analysis
Opis:
Very often we complain about the decisions that were previously made. Yet the fact is that the decisions made were based on the knowledge we had before. By now we have gained more knowledge. Therefore the common problem of making decisions is that decisions are not made reliable enough because parameters in risk assessment and supply chain management are underestimated or not robust enough. In this paper we propose a framework that will try to predict future situations collectively and increase the reliability of decision making. Project management is the art of making right decision. Project managers are faced by huge array of choices. Decision analysis is used in strategic planning, operational management, and other areas of business. Decision analysis helps companies to determine optimal exploration and production strategies with uncertainties in cost, prices, and exploration prospects. This paper describes project management steps and the way they can be supported by Intelligent Decision Support system (IDSS). The main parameters assessed are total cost of the projects, time of the project total fulfilment, number of subcontractors, location factors, and etc. IDSS will enable to collect data, propose possible alternative decisions, and provide risk assessment.
Źródło:
Journal of Machine Engineering; 2008, 8, 1; 104-113
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the OpenCV library in indoor hydroponic plantations for automatic height assessment of plants
Autorzy:
Pietrzykowski, Sławomir Krzysztof
Wymysłowski, Artur
Powiązania:
https://bibliotekanauki.pl/articles/27314190.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
hydroponics
image analysis
automatics
mechatronic system
opencv
phenotyping
Opis:
This paper presents a method for automatically measuring plants’ heights in indoor hydroponic plantations using the OpenCV library and the Python programming language. Using the elaborated algorithm and Raspberry Pi-driven system with an external camera, the growth process of multiple pak choi cabbages (Brassica rapa L. subsp. Chinensis) was observed. The main aim and novelty of the presented research is the elaborated algorithm, which allows for observing the plants’ height in hydroponic stations, where reflective foil is used. Based on the pictures of the hydroponic plantation, the bases of the plants, their reflections, and plants themselves were separated. Finally, the algorithm was used for estimating the plants’ heights. The achieved results were then compared to the results obtained manually. With the help of a ML (Machine Learning) approach, the algorithm will be used in future research to optimize the plants’ growth in indoor hydroponic plantations.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2022, 16, 2; 55--63
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of solar collectors on the example of a water-park. Part 1: Technical analysis
Wykorzystanie kolektorow slonecznych na przykladzie parku wodnego. Cz. 1: Analiza techniczna
Autorzy:
Tucki, K.
Powiązania:
https://bibliotekanauki.pl/articles/793132.pdf
Data publikacji:
2016
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
solar collector
technological analysis
modernization
energy system
water park
heating system
swimming pool
venting system
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2016, 16, 1
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostic vision system for welded joint and welding process assessment
System diagnostyki połączeń spawanych i procesu spawania
Autorzy:
Bzymek, A.
Fidali, M.
Jamrozik, W.
Timofiejczuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/258127.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
diagnostyka
spawanie
system wizyjny
analiza obrazu
welding
diagnostics
vision system
image analysis
Opis:
The paper deals with a vision system applied for diagnosing the welding process and welded joints. The vision module of the system consists of three cameras (one IR and two CCD). The IR camera observes a welding arc and joint (in one image); whereas, two CCD cameras observe the arc and joint in two separate images. The system has been developed to operate during the welding process. Results of the operation of the system have been distinguished into groups related to process parameters and joint features. With the use of the system, it is possible to recognise some abnormalities and joint faults. They were enumerated and characterised. In the paper, the main modules of the system are described. Some examples of image processing and analysis are presented and discussed. At present, the system is being verified. Some observations related to the application of the system are described.
W pracy przedstawiono system wizyjny zastosowany do diagnostyki procesu spawania i połączeń spawanych. System składa się z trzech kamer (IR i dwóch CCD). Kamera IR obserwuje łuk spawalniczy i połączenie (prezentowane na jednym obrazie), podczas gdy dwie kamery CCD obserwują odpowiednio łuk i połączenie (prezentowane na dwóch oddzielnych obrazach). System został opracowany dla celów zastosowania w trakcie procesu spawania. Wyniki działania systemu zostały podzielone na grupę związaną z parametrami procesu i niezgodnościami połączeń. Zastosowanie systemu pozwala na rozpozna-nie anomalii procesu oraz niepoprawnych połączeń. Zostały one wymienione i scharakteryzowane w pracy. Przedstawiono także przykłady i dyskusję wyników przetwarzania i analizy obrazów oraz opisano spostrzeżenia związane z zastosowaniem systemu. Obecnie, system jest w fazie weryfikacji.
Źródło:
Problemy Eksploatacji; 2008, 4; 39-51
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent System in the Context of Business Process Modelling
Autorzy:
Yaremko, Svetlana A.
Kuzmina, Elena M.
Savina, Nataliia B.
Gromaszek, Konrad
Yeraliyeva, Bakhyt
Borankulova, Gauhar
Powiązania:
https://bibliotekanauki.pl/articles/1844622.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
business process
automation
simulation modelling
intelligent system
expert system
intelligence analysis
forecasting
Opis:
The article deals with the features and characteristics of intelligent systems for modelling business processes. Their classification was made and criteria for comparison were developed. According to the comparative analysis of existing expert systems for intelligent analysis, a reasonable choice of system for modelling business processes of a particular enterprise has been carried out. In general, it was found that the introduction of intelligent systems for modelling business processes of the enterprise and forecasting its activities for future allows management of the company to obtain relevant and necessary information for the adoption of effective management decisions and the development of a strategic plan.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 163-168
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of the state space of management process in the industry applying expert systems
Analiza zastosowania systemu eksperckiego w sterowaniu procesami produkcyjnymi
Autorzy:
Ivanova, I. D.
Sergutenko, A. V.
Kamiński, J. R.
Kuboń, M.
Powiązania:
https://bibliotekanauki.pl/articles/93413.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
expert system
analysis
process
production
stability
system ekspercki
analiza
proces
produkcja
stabilność
Opis:
The article includes analysis of expert system application possibilities in the environment of production processes control. Such concepts as artificial intelligence, expert system, intellectual factor, state space were used. The object of the research consisted of the mechanism of controlling an enterprise (manager). These mechanisms were analysed from the point of view of state space. The graph method was used to visualize information presentation. Analysis of control processes of an enterprise was carried out by determination of their state space. The concept of state space itself is completed with numerous measurement values (parameters) under influence of which the process of task solution takes place. Moreover, the concept of static and dynamic elements of state space of the control system is applied. It was shown that dynamic elements enable the quality presentation of space, which without including other restrictions leads to extension of its impact, which confirms that a given system has an intelligent factor.
W artykule przeprowadzono analizę możliwości zastosowania systemów eksperckich, w takim środowisku, jak sterowanie procesami produkcyjnymi. Wykorzystano terminy: sztuczna inteligencja, system ekspercki, czynnik intelektualny, przestrzeń stabilności. Obiektem badań były mechanizmy sterowania przedsiębiorstwem (menażerstwa). Mechanizmy te analizowano z punktu widzenia stabilności przestrzennej. W artykule wykorzystano metodę grafów w celu wizualnego przedstawienia informacji. Przeprowadzono analizę procesów sterujących przedsiębiorstwem drogą wyznaczenia ich przestrzeni stabilności. Sam termin przestrzeń stabilności uzupełniany jest licznymi wielkościami pomiarowymi (parametrami), pod wpływem których zachodzi proces rozwiązania zadania. Także stosowane jest pojęcie statycznych i dynamicznych składowych przestrzeni stabilności systemu sterowania. Pokazano, że składowe dynamiczne umożliwiają jakościowe przedstawienie przestrzeni, które przy nie uwzględnianiu innych ograniczeń prowadzi do rozszerzenia swego oddziaływania, co utwierdza o posiadaniu przez dany system inteligentnego czynnika.
Źródło:
Agricultural Engineering; 2017, 21, 2; 81-90
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinematic model of multiple trailers on a tractor system for production logistics applications
Autorzy:
Paszkowiak, Wojciech
Bartkowiak, Tomasz
Pelic, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/94158.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
milk-runner
kinematic analysis
steering system
collision
validation
Opis:
This paper demonstrates kinematic analysis of multiple trailers on a tractor system for production logistics. The analysis concerned three different steering systems of the trailers: virtual clutch and drawbar system, conventional clutch and drawbar system, double Ackermann steering system. Designed kinematic models contain various variants of paths: turning at a constant value of the steering angle, changing the steering angle as a result of an approaching collision. Each of these variants also included driving in a straight line after a 90° turn. The validation of the developed kinematic model was done by using a real logistic train, which path was registered via aerial drone. For each of the developed kinematic models, a visualization of drive through the 90° turn was created.
Źródło:
Archives of Mechanical Technology and Materials; 2019, 39; 16-25
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping marine traffic density by using AIS data: an application in the Northern Aegean Sea
Autorzy:
Kundakҁi, B.
Nas, S.
Powiązania:
https://bibliotekanauki.pl/articles/259920.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Automatic Identification System
marine traffic
marine traffic analysis
Opis:
Automatic Identification System (AIS) data is used for monitoring the movements of vessels live movements through instant transmission of vessel information while, at the same time, historical AIS data is used for marine traffic analysis by researchers. There are several methods and computer programs developed for the analysis of marine traffic by the use of AIS data. Combining the intersection algorithm proposed by Antonio (1992) and distance calculation method, this study develops a method to analyse vessel distribution on a selected cross sectional line (SCS) in the Northern Aegean Sea. As a complementary to the new methods proposed, a desktop application is developed in C# programming language to visualize the vessel distribution on the SCS line. SQL server is used for AIS data storage and analysis. The study is conducted over 7-day AIS data, specifically 2.382.469 rows and 42.884.442 data in total, belonging to the Northern Aegean Sea marine traffic. As a result, the mapping of the movements of different types of vessels in the Northern Aegean Sea is effectively performed and Frequency-Distance, Draught-Distance, SOG-Distance, SOG-COG distributions on the SCS line are successfully analysed by the new method introduced.
Źródło:
Polish Maritime Research; 2018, 4; 49-58
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A hybrid setarx model for spikes in tight electricity markets
Autorzy:
Lucheroni, C.
Powiązania:
https://bibliotekanauki.pl/articles/406389.pdf
Data publikacji:
2012
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
stochastic processes
time series analysis
power system economics
Opis:
The paper discusses a simple looking but highly nonlinear regime-switching, self-excited threshold model for hourly electricity prices in continuous and discrete time. The regime structure of the model is linked to organizational features of the market. In continuous time, the model can include spikes without using jumps, by defining stochastic orbits. In passing from continuous time to discrete time, the stochastic orbits survive discretization and can be identified again as spikes. A calibration technique suitable for the discrete version of this model, which does not need deseasonalization or spike filtering, is developed, tested and applied to market data. The discussion of the properties of the model uses phase-space analysis, an approach uncommon in econometrics.
Źródło:
Operations Research and Decisions; 2012, 22, 1; 13-49
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DTA Thermal Analysis of Alloys from Nickel-Rich Part of Ni-Al-Cr System
Autorzy:
Maciąg, T.
Powiązania:
https://bibliotekanauki.pl/articles/351762.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ni-Al-Cr system
order-disorder
DTA analysis
Opis:
Thermal analysis allows for determination of temperature specific for the beginning and the end of phase transitions occurring in studied samples. In this paper results obtained from DTA (Differential Thermal Analysis) of alloys of chemical composition referring to nickel-rich part of Ni-Al-Cr system, specifically from section Ni75Al25÷Ni65Cr35 are presented. Those alloys are based on intermetallic phase Ni3 Al. Referring to measurements obtained during heating and cooling, characteristic peaks related to occurrence of phase transition of order-disorder type were noted as well as melting and solidification temperature of alloys was determined. Results of thermal analysis DTA of studied range were compared with results obtained for section Ni75Al25÷Ni75Cr25 and Ni75Al25÷Ni87Cr13, additionally results of measurements performed on high-temperature solution calorimeter were collated. Both methods presented good compatibility.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 981-986
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating a computer application that aids multi-criteria decision making
Autorzy:
Rajiansyah
Filcek, Grzegorz
Ramsey, David M.
Powiązania:
https://bibliotekanauki.pl/articles/33922499.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
multi-criteria analysis
SMART
AHP
ANP
system usability
Opis:
In this article, we describe and assess the implementation of several methods of multi-criteria decision-making using a web-based computer application. Such an application makes it easier to determine the effectiveness of decisions. The methods adopted in this application are SMART (Simple Multi-Attribute Rating Technique), AHP (Analytic Hierarchy Process), and ANP (Analytic Network Process). Each of these methods has distinctive characteristics in determining the best alternative for the user. This study assesses the feasibility of each method in the application. The application is assessed based on functionality, reliability, efficiency, and usability. (1) Functionality is tested according to the appropriateness of the decisions made, (2) Reliability is assessed using stress testing, (3) Efficiency is assessed according to the computational effort, and (4) System usability is tested according to the user's answers to the Computer System Usability Questionnaire authored by J.R. Lewis. This research results in a decision support system based on SMART that has been appropriately tested and is ready for use.
Źródło:
Multiple Criteria Decision Making; 2023, 18; 47-76
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected issues regarding achievements in component importance analysis for complex technical systems
Autorzy:
Chybowski, L.
Gawdzińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/135196.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
importance analysis
complex system
human machine interfaces
machinery
quality criteria
multi-criteria analysis
Opis:
Selected issues of component importance analysis for complex technical systems have been presented in this paper. A generic example of a complex technical system and selected statistics of operating losses have been described. A description and diagrams of both qualitative and quantitative importance analysis have also been included. The most significant problems facing complex technical system modelling have been pointed out. A multi-criteria system component importance analysis and the basic criteria for a system component quality evaluation have also been introduced. Some factors influencing the importance of the technical system’s components have also been described. Finally, the necessity of further developing importance analysis methods for machinery operation has been highlighted.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 137-144
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial distribution analysis of ship accidents in the Çanakkale Strait
Autorzy:
Bayazit, Ozan
Toz, Ali C.
Buber, Muge
Powiązania:
https://bibliotekanauki.pl/articles/906090.pdf
Data publikacji:
2020
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Çanakkale Strait
Geographic Information System
marine accident
spatial analysis
risk
Point Density Analysis
Opis:
This study used a spatial distribution analysis to identify the risky areas in the Çanakkale Strait – one of the narrowest waterways with high marine traffic – in terms of ship accidents. To accomplish this, a point density analysis, as part of the geographic information systems (GIS) methodology, was used to create accident density distributions and thematic maps. A total of 162 marine accidents in the Çanakkale Strait between 2007 and 2018 were taken into account. Detailed technical data of accidents were obtained from accident reports provided by the Turkish Maritime Search and Rescue Coordination Center (TMSRCC). The results showed that, among the 162 cases, bulk carriers have the highest accident rate, and most accidents at the Nara Turn were caused by engine failure. In addition, accidents due to navigational failure occurred in every region of the strait. Remarkably, factors directly and indirectly related to human error were still the determining factors in marine accidents. As a result, the risk of marine accidents was higher in the narrow portions of the waterway, and navigation was difficult, especially in areas such as the Nara Turn Point. In future research, it is recommended to consider a wider period of activities using different methods to provide more comprehensive results.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2020, 62 (134); 9-17
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the beef prices in selected countries of the European Union
Autorzy:
Jaworski, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/453098.pdf
Data publikacji:
2012
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
B-splines basis system
functional principal component analysis
functional analysis of variance
permutation tests
Opis:
Functional data analysis is used to examine beef price differences in selected countries of the European Union from 2006 to 2011. The prices are modeled as functional observations. The analysis is conducted in three steps relating to three kinds of functional data analysis. First the observations are smoothed with roughness penalty. Then functional principal analysis is applied. Finally functional analysis of variance is used to reveal significant difference between two given groups of countries.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2012, 13, 2; 31-39
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Healthcare public funding efficiency as exemplified by hospitals in Polish regions
Autorzy:
Kosycarz, Ewa Agnieszka
Dędys, Monika Małgorzata
Ekes, Maria Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/17901610.pdf
Data publikacji:
2022-08-02
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Zarządzania i Finansów
Tematy:
Data Envelopment Analysis
healthcare system efficiency
centralised/decentralised healthcare system
ageing society
salaries
Opis:
The aim of this study is to evaluate and compare the financial and managerial efficiency of healthcare inpatient systems in one country. The research question is: What factors give rise to efficiency variations within the regional healthcare system (hospitals)? A two-step approach proposed by Simar and Wilson has been applied. The first step applies the Data Envelopment Analysis to estimate the unit (i.e., a Polish region in our research) efficiency scores, which is followed by truncated regression with double bootstrapping to examine the impact of uncontrolled variables on efficiency scores. The efficiency scores obtained in 16 regions from the output-oriented model with non-increasing returns to scale indicate a full effectiveness of five regions. The DEA scores of the other regions exceed the value of 0.8 and do not differ significantly. The bootstrap-corrected DEA scores do not considerably change the efficiency assessment. The direction of the impact of the ‘percentage of people above 65 years of age’ variable and the ‘growth rate of total liabilities on efficiency’ variable is opposite to that observed for the ‘average salary’ variable. The results obtained suggest that the regional healthcare system efficiency can be affected by the ageing population, pay pressure, and liabilities.
Źródło:
Journal of Management and Financial Sciences; 2022, 45; 49-65
1899-8968
Pojawia się w:
Journal of Management and Financial Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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