Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "system analysis" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 88
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:
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:
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:
Zmiana społeczna w perspektywie teorii systemu światowego Immanuela Wallersteina
Social Change in Immanuel Wallerstein’s World-System Theory
Autorzy:
Osicka-Kajda, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2137709.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
social change
modernization theories
world-system analysis
historical sociology
zmiana społeczna
teorie modernizacji
analiza systemu światowego
socjologia historyczna
Opis:
The purpose of the article is to analyse Immanuel Wallerstein's approach towards social change and to compare it with the concept of macrosocial change in modernization theories. The main thesis proposed by the authoress is that although Immanuel Wallerstein declares that perception of social change as framed by the 'ahistorical models' (such bias being typical of modernization theories) should be abandoned, he nevertheless advances a model which is equally ahistorical.
Celem artykułu jest przybliżenie i analiza ujęcia zmiany społecznej w teorii systemu światowego Immanuela Wallersteina oraz porównanie jego koncepcji z ujęciem zmiany w teoriach modernizacji. Autorka stoi na stanowisku, że choć Wallerstein deklaruje konieczność zerwania z ujmowaniem zmiany społecznej w ramach „modeli ahistorycznych” (ku którym zwracają się teorie modernizacji), proponuje w istocie model równie ahistoryczny.
Źródło:
Studia Socjologiczne; 2009, 2(193); 77-108
0039-3371
Pojawia się w:
Studia Socjologiczne
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:
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:
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:
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:
Improvement of damping characteristics and index evaluation of a wind-PV-thermal-bundled power transmission system by combining PSS and SSSC
Autorzy:
He, Ping
Wu, Xinxin
Li, Congshan
Zheng, Mingming
Li, Zhao
Powiązania:
https://bibliotekanauki.pl/articles/140453.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
damping characteristics
eigenvalue analysis
power system stabilizer
wind-PV-thermal-bundled power system
Opis:
The grid integration of large-scale wind and solar energy affects the power flow of wind-PV-thermal-bundled power transmission systems and may introduce an unpredicted threat to the power system’s small signal stability. Meanwhile, a power system stabilizer (PSS) and static synchronous series compensator (SSSC) play an important role in improving the static and dynamic stability of the system. Based on this scenario and in view of the actual engineering requirements, the framework of wind-PV-thermal-bundled power transmitted by an AC/DC system with the PSS and SSSC is established considering the fluctuation of wind and photovoltaic power output and the characteristics of the PSS and SSSC. Afterwards, the situation model is constructed in the IEEE 2-area 4-unit system, and the influence of the PSS and SSSC on the system stability under different operating conditions is analyzed in detail through eigenvalue analysis and time-domain simulation. Finally, an index named the gain rate is defined to describe the improvement of the stability limitations of various wind-PV-thermal operating conditions with the PSS and SSSC. The results indicate (K) that the damping characteristics, dynamic stability and stability limitations for various wind-PV-thermal operating conditions of the wind-PV-thermal-bundled power transmission system can be significantly improved by the interaction of the PSS and SSSC.
Źródło:
Archives of Electrical Engineering; 2020, 69, 3; 705-721
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena jakości metalurgicznej żeliwa sferoidalnego w oparciu o analizę termiczną ATAS
Rating Metallurgical Quality Ductile Iron Based on Thermal Analysis ATAS
Autorzy:
Ronduda, M.
Zaczyński, A.
Schmalenberg, K.
Powiązania:
https://bibliotekanauki.pl/articles/382827.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analiza termiczna
żeliwo sferoidalne
system ATAS
thermal analysis
spheroidal cast iron
ATAS system
Opis:
Przedstawiono dwie metody oceny stabilności jakości metalurgicznej ciekłego metalu podczas przetrzymywania stopu w piecu, sferoidyzacji i modyfikacji. Powszechnie stosowane prowadzenie procesu metalurgicznego bazuje się na doborze tworzywa o określonym równoważniku węglowym CE z wykorzystaniem wyników analizy spektralnej składu chemicznego stopu. Wprowadzenie analizy termicznej pozwoliło na procesowy monitoring on-line wykorzystujący aktywny równoważnik węglowy ACEL. Zastosowana analiza termiczna (system ATAS) umożliwiła uzyskanie większej stabilności procesowej otrzymywania odlewów z żeliwa sferoidalnego bez porowatości skurczowej.
There were presented two methods to estimate the liquid cast iron metallurgical quality stability, during casting alloy’s furnace processing, spheroidization and modification. Commonly used metallurgical process handling was based on choice of the material with specified carbon equivalent (CE), basing on spectroanalysis. On the other hand thermoanalysis has enabled the „on-line” process monitoring, with the use of active carbon equivalent ACEL. Thermoanalysis applied (the ATAS system) allowed to achieve better process stability of nodular cast iron and castings without shrinkage porosity.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4 spec.; 103-108
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer system for identification of material models on the basis of plastometric tests
System komputerowy do identyfikacji modeli materiałowych na podstawie testów plastometrycznych
Autorzy:
Rauch, L.
Sztangret, L
Pietrzyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/351404.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inverse analysis
metamodel
computer system
plastometric test
analiza odwrotna
system komputerowy
test plastometryczny
Opis:
The paper describes the hybrid computer system dedicated to identification of models of materials subjected to thermomechanical processing. The functionalities of the system consist of plastometric tests data processing and application of the inverse analysis. The latter functionality is realized unconventionally, instead of the finite element method the metamodel is implemented using artificial neural network. The metamodels, used for simulations of the plastometric tests, are imported to the proposed computer system as external plugins, what guarantees flexibility and possibility of further development. On the other hand, application of rich optimization libraries assures the best possible solution of the problem. Basic principles of the inverse analysis with metamodels and mentioned optimization procedures are described in the paper. Selected examples of identification of models for various metallic materials recapitulate the paper.
Artykuł przedstawia system komputerowy dedykowany identyfikacji modeli materiałów poddanych obróbce cieplnomechanicznej. Funkcjonalność systemu obejmuje przetwarzanie danych pomiarowych oraz analizę odwrotną. W przeciwieństwie do rozwiązań konwencjonalnych opartych o metodę elementów skończonych, podstawę rozwiązania stanowi metamodel do symulacji prób doświadczalnych wykonywanych dla identyfikacji modeli materiałów. Metamodele zrealizowane z użyciem sztucznych sieci neuronowych są importowane do systemu jako tzw. wtyczki, co zapewnia elastyczność i mozliwość rozwoju rozwiązania. Ponadto, wykorzystanie bogatych bibliotek metod optymalizacji zapewnia uzyskanie najlepszego z możliwych rozwiązań. Podstawowe zagadnienia analizy odwrotnej z użyciem metamodeli oraz wspomnianych metod optymalizacji opisane zostały w niniejszym artykule. Przedstawiona została również architektura stworzonego systemu komputerowego oraz przykłady jego wykorzystania do identyfikacji parametrów modeli wybranych materiałów metalicznych.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 3; 737-743
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does lean practices implementation impact on company performance? A meta-analytical research
Autorzy:
Gonçalves, Telma I. G.
Sousa, Paulo S. A.
Moreira, Maria R. A.
Powiązania:
https://bibliotekanauki.pl/articles/407127.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lean manufacturing
performance evaluation
meta-analysis
manufacturing system
company
Opis:
Studies linking the use of lean practices to company performance have been increasing as markets are becoming more competitive and companies are eager for reducing waste and therefore implementing the Lean Management (LM) philosophy to improve performance. However, results from these studies have found various and different impacts and some light is needed. Extant literature was reviewed and, to achieve the research objective, a metaanalysis of correlations was carried out. The obtained results suggest a positive relationship between some lean practices and performance measures. Furthermore, the presence of moderators influencing the relationship between lean practices and performance outcomes is highlighted in our results. To our best knowledge, this is the first research that proposes a comparison of results from primary studies on Lean implementation, by analysing the linear relationship between lean practices and enterprise performance. It fills this gap and therefore represents an important contribution.
Źródło:
Management and Production Engineering Review; 2019, 10, 4; 11-24
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and comparison of the stability of discrete-time and continuous-time linear systems
Autorzy:
Kaczorek, T.
Powiązania:
https://bibliotekanauki.pl/articles/229420.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analysis
comparison
stability
discrete-time
continuous-time
linear system
Opis:
The asymptotic stability of discrete-time and continuous-time linear systems described by the equations xi+1 = Ākxi and x(t) = Akx(t) for k being integers and rational numbers is addressed. Necessary and sufficient conditions for the asymptotic stability of the systems are established. It is shown that: 1) the asymptotic stability of discrete-time systems depends only on the modules of the eigenvalues of matrix Āk and of the continuous-time systems depends only on phases of the eigenvalues of the matrix Ak, 2) the discrete-time systems are asymptotically stable for all admissible values of the discretization step if and only if the continuous-time systems are asymptotically stable, 3) the upper bound of the discretization step depends on the eigenvalues of the matrix A.
Źródło:
Archives of Control Sciences; 2016, 26, 4; 551-563
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Construction of an Expert System Based on Fuzzy Logic for Diagnosis of Analog Electronic Circuits
Autorzy:
Grzechca, D. E.
Powiązania:
https://bibliotekanauki.pl/articles/226616.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analog circuits fault diagnosis
analog system testing
fuzzy set theory
expert system
sensitivity analysis
Opis:
The paper presents construction of the fuzzy logic system to analog circuits parametric fault diagnosis. The classical dictionary construction is replaced by fuzzy rule system. The first part refers to analog fault diagnosis, its techniques, approaches and goals. It clarifies common strategy and define differences between detecting, locating and identifying a fault in analog electronic circuit. The second part is focused on a creation of fuzzy rule expert system with use of sensitivity functions and known circuit topology. To detect, locate and identify a faulty element in a circuit the sensitivity matrix is used. The advantage of the method is its utilization in all, AC, DC and time domain. The fuzzy system, like the classical fault dictionary, can detect and locate single catastrophic faults and, on the contrary to the classical one, it also detects and locates parametric faults. Moreover, it allows identification of these faults, such that sign of the faulty parameter deviation is designated. The method has deterministic character as well as it can be applied on the verification and production stage.
Źródło:
International Journal of Electronics and Telecommunications; 2015, 61, 1; 77-82
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 88

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies