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Tytuł:
Investigation on the effect of the vibratory peening process parameters on Almen intensity
Autorzy:
Paques, Maxime
Miao, Hong Yan
Changeux, Benoit
Turenne, Sylvain
Badreddine, Jawad
Martin, Etienne
Powiązania:
https://bibliotekanauki.pl/articles/24084748.pdf
Data publikacji:
2023
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
vibratory peening
almen intensity
DOE method
Opis:
Vibratory peening is a mechanical surface treatment process to improve both the fatigue life and smooth surface finish of metallic components in a single operation. Almen intensity is a significant parameter to relate the compressive residual stresses induced by the peening processes. In this study, the design of experiments (DOE) was used to investigate the effect of seven vibratory peening process parameters on Almen intensity. A specific vibratory peening machine, with the tub vibrating in a vertical pattern and resting on airbags, was built. Two empirical linear models were fitted. First, a screening model with primary effects showed that the media mass, airbag pressure, specimen longitudinal position, and lubrication rate have minor influence on Almen intensity. Secondly, a definitive model showed that high eccentricity, high frequency, and deep specimen immersion are required to reach high Almen intensities. The complex interactions between eccentricity, immersion depth, and frequency are described.
Źródło:
Journal of Machine Engineering; 2023, 23, 3; 98--115
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using a Parameter Diagram as a DoE Planning Tool
Autorzy:
Barsalou, Matthew
Wilcynska, Karolina
Saraiva, Pedro Manue
Powiązania:
https://bibliotekanauki.pl/articles/27324204.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
design of experiments
parameter-diagram
p-diagram
DoE
experiment planning
Opis:
This paper describes the p-diagram (parameter-diagram) and its application in planning a DoE (Design of Experiments). A case study describing an actual problem from industry is presented where the planning phase started to go wrong as difficulties in selecting the right variables for the DoE were discovered. Furthermore, running these experiments became prohibitively expensive, due to the large number of such experiments that would be needed, and though the exploitation of a p-diagram it was then possible to come up with a feasible DoE.
Źródło:
Management and Production Engineering Review; 2023, 14, 4; 3--9
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of welding parameters of resistance spot welding on joining aluminum with copper
Autorzy:
Sar, Mohammed Helan
Ridha, Munaf Hashim
Husain, Imad M.
Barrak, Osamah Sabah
Hussein, Sabah Khammass
Powiązania:
https://bibliotekanauki.pl/articles/2174202.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
zgrzewanie oporowe
aluminium
miedź
resistance spot welding (RSW)
aluminum (Al)
copper
RSW parameter
DOE
Opis:
The resistance spot welding (RSW) method was used to join aluminum alloy AA 1050 and copper alloy UNS C50100 sheets. Mechanical properties of the joints were examined. The influence of welding process parameters on tensile shear force of the joints was discussed. The design of experiments (DOE) method was used to analyze the influence of welding parameters on the mechanical properties of the joints. Three RSW parameters were used: welding current, squeeze time, and welding time. The results showed that the joint shear stress increased with increasing the welding current until a value of 12000 Amp. Then the shear stress decreased. The tensile shear stress increased with increasing the welding and squeeze time. As a consequence, it can be possible to weld copper with aluminum by RSW.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 2; 217--225
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joining of carbon steel AISI 1006 to aluminum alloy AA6061-T6 via friction spot joining technique
Autorzy:
Ridha, Munaf Hashim
Saad, Mursal Luaibi
Abdullah, Isam Tareq
Barrak, Osamah Sabah
Hussein, Sabah Khammass
Hussein, Abbas Khammas
Powiązania:
https://bibliotekanauki.pl/articles/27312396.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
stal węglowa
tarcie
aluminium
friction spot
joining
AA6061
carbon steel AISI 1006
DOE
Opis:
This work aims to join sheets of carbon steel to aluminum alloy AA6061. A lap joint arrangement was used with a joint lap area of dimensions *25 25 mm . The joining procedure was carried out using a rotating tool of 10 mm shoulder diameter. Three process parameters, with three levels for each parameter, were selected to investigate their effects on joints quality. The parameter’s levels for each experiment were designed using the design of the experiment method (DOE). The results indicated that the two materials were joined by a mechanical interlock at an interface line, without formation of intermetallic compounds. The shear force of the joint reached an ultimate value of .4 82kN . The shear force of the joint improved by increasing plunging depth of the tool. Samples of minimum shear force value failed by a pull-outing aluminum metal from the carbon steel specimen. Samples of higher shear force value exhibited a shear mode of fracture. Increasing the rotating speed and decreasing pre-heating increased the process temperature.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 4; 1--12
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Landslide stability analysis with the use of the design of experiments method – case study of souk ahras, Algeria
Autorzy:
Charef, Nouar
Mezhoudi, Issam
Boumezbeur, Abderrahmane
Harrat, Nabil
Powiązania:
https://bibliotekanauki.pl/articles/2201668.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
landslide
Souk-Ahras region
numerical modeling
safety factor
geotechnical parameters
design of experiments DoE
response surface methodology
RSM
osuwisko
region Souk-Ahras
modelowanie numeryczne
współczynnik bezpieczeństwa
parametry geotechniczne
Opis:
In the northeast of Algeria, Souk Ahras area is known for the severity and spread of landslides, especially in Mechroha and Zaarouria municipalities. Stability analysis of landslides in these areas depends on the calculations of safety factor according to several parameters (physical, mechanical, geological…). The aim of this study is to investigate the parameters affecting the safety factor using the design of experiments (DOE) method, central composite design (CCD) and response surfaces methodology (RSM). These methods use parameter modeling and optimization to discuss a solution of landslide hazard by developing models of safety factor (Fs) considered as response. The other parameters adopted as input independent factors are geotechnical physical and mechanical parameters such as: the dry and wet unit weight (γd, γh), the water content (w), the plasticity and liquidity limits and the plasticity index (WL, WP, IP), the percentage of fine elements Ff (%) < 0.08 mm), the cohesion C and the internal friction angle (Phi). Obtained results show high correlations with a regression coefficient R2 of 0.88 and 0.93 in the two cases study and the predicted factor of safety model fit best to those obtained in the analytical and numerical modeling procedure. The final model is applicable to give reliable results on the safety factor of landslides.
Źródło:
Geomatics, Landmanagement and Landscape; 2022, 4; 137--150
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of Injection Moulding Process via Design of Experiment (DOE) Method based on Rice Husk (RH) Reinforced Low Density Polyethylene (LDPE) Composite Properties
Autorzy:
Jaya, Haliza
Zulkepli, Nik Noriman
Omar, Mohd Firdaus
Abd Rahim, Shayfull Zamree
Nabiałek, Marcin
Jeż, Kinga
Al Bakri Abdullah, Mohd Mustafa
Powiązania:
https://bibliotekanauki.pl/articles/2106601.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
injection moulding
design of experiments
DOE
central composite design
response surface methodology
RSM
shrinkage
tensile strength
Opis:
Optimal parameters setting of injection moulding (IM) machine critically effects productivity, quality, and cost production of end products in manufacturing industries. Previously, trial and error method were the most common method for the production engineers to meet the optimal process injection moulding parameter setting. Inappropriate injection moulding machine parameter settings can lead to poor production and quality of a product. Therefore, this study was purposefully carried out to overcome those uncertainty. This paper presents a statistical technique on the optimization of injection moulding process parameters through central composite design (CCD). In this study, an understanding of the injection moulding process and consequently its optimization is carried out by CCD based on three parameters (melt temperature, packing pressure, and cooling time) which influence the shrinkage and tensile strength of rice husk (RH) reinforced low density polyethylene (LDPE) composites. Statistical results and analysis are used to provide better interpretation of the experiment. The models are form from analysis of variance (ANOVA) method and the model passed the tests for normality and independence assumptions.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 719--727
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges for the DOE methodology related to the introduction of Industry 4.0
Autorzy:
Pietraszek, Jacek
Radek, Norbert
Goroshko, Andrii V.
Powiązania:
https://bibliotekanauki.pl/articles/1839493.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
DOE
industry 4.0
data-driven approaches
uncertainty
przemysł 4.0
niepewność
Opis:
The introduction of solutions conventionally called Industry 4.0 to the industry resulted in the need to make many changes in the traditional procedures of industrial data analysis based on the DOE (Design of Experiments) methodology. The increase in the number of controlled and observed factors considered, the intensity of the data stream and the size of the analyzed datasets revealed the shortcomings of the existing procedures. Modifying procedures by adapting Big Data solutions and data-driven methods is becoming an increasingly pressing need. The article presents the current methods of DOE, considers the existing problems caused by the introduction of mass automation and data integration under Industry 4.0, and indicates the most promising areas in which to look for possible problem solutions.
Źródło:
Production Engineering Archives; 2020, 26, 4; 190-194
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designing Cement Mortars Modified with Cork and Rubber Waste Using Theory of the Experiment
Autorzy:
Dębska, Bernardeta
Krasoń, Joanna
Lichołai, Lech
Powiązania:
https://bibliotekanauki.pl/articles/124330.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
rubber waste
cork waste
cement mortars
Design of Experiments
DoE
Response Surface Methodology
RSM
Opis:
The article concerns the possibility of obtaining modified cement mortars and assessing their selected properties, i.e. bending and compressive strength, volume density of hardened mortars and water absorption. The modification consisted in a partial (0–50% vol.) substitution of sand by waste, crushed rubber, and cork. In the mortar design process, the theory of the experiment was used. The central composite design used available in the Statistica software package was response surface. This approach allowed to significantly reduce the number of experiments, reduce costs, and at the same time keep the maximum information about the mortars tested. The conducted research showed that waste materials can be an alternative to natural aggregates in the process of obtaining light mortars.
Źródło:
Journal of Ecological Engineering; 2019, 20, 9; 121-130
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a method for finding the optimal solution when upgrading a motorcycle engine
Autorzy:
Vrublevskyi, Oleksandr
Wojnowski, Radomir
Powiązania:
https://bibliotekanauki.pl/articles/298245.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
spark ignition engine
thermodynamic cycle simulations
optimization
design of experiments
DoE
Monte Carlo method
Nonlinear Programming Quadratic Line search
NLPQL
Opis:
This paper describes a method for finding the optimal parameters of a spark-ignition engine gas exchange system for a motorcycle. The vectors of the initial data for filling the parameter space, in which the search for the optimal solution has been made, have been formed through methods of experiment planning and technique nonlinear programming quadratic line search. As the quality criteria, the engine power has been used at selected points of the external speed characteristic. The results of the work have shown how using the proposed optimization method allows modernization of a gas exchange systems in order to increase the engine power.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(2); 135-149
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metafory zwierzęce w Błogosławieństwie Jakuba (Rdz 49, 1-28)
Animal Metaphors in the Blessing of Jacob (Gen 49:1-28)
Autorzy:
Wajda, Anna Maria
Powiązania:
https://bibliotekanauki.pl/articles/2034916.pdf
Data publikacji:
2019-04-16
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
błogosławieństwo Jakuba
metafory zwierzęce
lew
osioł
wąż
łania
wilk
Jacob’s blessing
animal metaphor
lion
ass
snake
doe
wolf
Opis:
The relatively numerous references to animals in the blessing of Jacob(Gen 49: 1-28) show that the biblical author had a broad knowledge of nature.According to the current classification of living organisms and method ofresearch used by modern zoology, it is stated that these observations donot have the characteristics of scientific research. In spite of this, they arethe evidence of the clear-sighted observation of animals, which is reflectednot only in the knowledge of the appearance of individual species, but alsoof specific behaviours related to their way of life. It concerns not only domesticanimals, like the ass (cf. Gen 49: 14), but also wild representativesof the fauna. References concerning the latter apply to the species perceivedas highly dangerous to man and domestic animals, that is the lion(cf. Gen 49: 9), snake (cf. Gen 49: 17) or wolf (cf. Gen 49: 27). Amongstthe animals mentioned in the blessing of Jacob one can also distinguishthose which aroused admiration because of their appearance, such as thedoe (cf. Gen 49: 21). At the same time, it is essential to emphasise the factthat the wealth of animal metaphors is just a tool used to translate “God’saddress” into human language.
Źródło:
Collectanea Theologica; 2018, 88, 4; 53-73
0137-6985
2720-1481
Pojawia się w:
Collectanea Theologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric analysis of the sensitivity of a prestressed concrete beam using the DOE simulation technique
Parametryczna analiza wrażliwości belki strunobetonowej za pomocą techniki symulacyjnej DOE
Autorzy:
Woliński, Sz.
Pytlowany, T.
Powiązania:
https://bibliotekanauki.pl/articles/230714.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
planowanie eksperymentu
DOE
belka strunobetonowa
ocena wrażliwości
niezawodność konstrukcji
design of experiment
pretensioned concrete beam
sensitivity assessment
structure reliability
Opis:
The paper presents the method of simplified parametric analysis of the sensitivity of a pre-tensioned concrete beam. The presented approach is based on the DOE (design of experiments) data collection which is simulation technique allowing for identification of variables deciding about the effectiveness and costs of designed structures. Additionally, application of the hyper-surface of the construction response allows designers to the development of multi-dimensional trade-off graphs to facilitate, the assessment of the scope of changes in random state variables permitted due to the adequate criteria and selection of their values close to optimum. Design basics, procedures and results of the presented considerations of sensitivity assessment and reliability of the structure has been shown on the example of a pre-stressed concrete beam designed in accordance with the requirements and procedures of Eurocode 2.
W artykule przedstawiono metodę analizy wpływu zmiennych wejściowych na parametry charakteryzujące stan konstrukcji sprężonych w początkowej i trwałej sytuacji obliczeniowej, opartą na symulacjach komputerowych i technice zbierania informacji DOE (Design Of Experiments). Założenia, procedury i wyniki zastosowania techniki DOE przedstawiono na przykładzie belki strunobetonowej zaprojektowanej zgodnie z wymaganiami Eurokodu 2. Przeprowadzono analizę typu „what-if” wpływu wartości obciążenia i siły sprężającej w poszczególnych cięgnach (uwzględniając straty wynikające z relaksacji stali sprężającej) oraz modułu sprężystości podłużnej betonu na nośność graniczną i maksymalne ugięcie belki.
Źródło:
Archives of Civil Engineering; 2019, 65, 4; 97-112
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Selected Parameters on the Stabilization Efficiency of the Organic Fraction of Municipal Solid Waste (OFMSW) in the Mechanical and Biological Treatment Plant (MBT)
Wpływ wybranych czynników na efektywność procesu stabilizacji organicznej frakcji odpadów komunalnych (OFMSW) w zakładzie obróbki mechaniczno-biologicznej
Autorzy:
Seruga, Przemysław
Krzywonos, Małgorzata
Wilk, Marta
Borowiak, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/1811755.pdf
Data publikacji:
2019
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
municipal solid waste
composting
mechanical-biological treatment
organic fraction
DOE
odpady komunalne
kompostowanie
mechaniczno-biologiczne przetwarzanie
frakcja organiczna
metoda planowania eksperymentu
Opis:
Composting is a natural process; however, many artificial factors have been developed to improve process efficiency for the organic fraction of municipal solid waste (OFMSW) stabilization in the mechanical-biological treatment (MBT) plant. The study aimed to assess the effect of aeration (X1), irrigation (X2), process time (X3) and turning frequency (X4) on OFMSW stabilization after the intensive degradation phase of compositing in a full-scale MBT plant. The four-factorial design on two levels with two replicates was used to the optimization of compost stabilization yield. Among analyzed factors, mechanical turning was found not to significantly influence the effect of stabilization. The achieved determination coefficient (R2) of 0.94 suggests an adequate representation of the process model and a good correlation between the experimental and predicted values. The achieved stabilization yield obtained in the control run was 47.5%, where the aeration (X1) was set up as blower working cycle: 10 minutes blowing and 5 minutes break, the irrigation level (X2) was set up for 10000 dm3/d and process was performed 4 weeks (X3).
Kompostowanie to zachodzący naturalnie tlenowy proces biodegradacji wykorzystywany przemysłowo zwłaszcza do przetwarzania odpadów. Opracowano i określono wiele parametrów tego procesu w celu poprawy wydajności procesu stabilizacji frakcji organicznej odpadów komunalnych (OFMSW) w zakładzie obróbki mechaniczno-biologicznej (MBT). Niniejsza praca miała na celu ocenę wpływu napowietrzania (X1), nawadniania (X2), czasu trwania procesu (X3) i częstotliwości przewracania pryzmy (X4) na stabilizację OFMSW uzyskanej po intensywnej fazie kompostowania w zakładzie MBT. Do optymalizacji wydajności stabilizacji kompostu wykorzystano czteroczynnikowy plan eksperymentu (DOE) na dwóch poziomach z dwoma powtórzeniami. Stwierdzono, że mechaniczne przewracanie pryzmy nie ma statystycznie istotnego wpływu na efektywność stabilizacji. Osiągnięty współczynnik determinacji (R2) wynoszący 0,94 sugeruje odpowiednią reprezentację modelu procesu i dobrą korelację między wartościami eksperymentalnymi i przewidywanymi. Uzyskana wydajność stabilizacji uzyskana w przebiegu kontrolnym wyniosła 47,5%, przy ustawieniu czasów pracy wentylatora napowietrzania jako 10 minut działania i 5 minut przerwy (X1), nawadniania na poziomie 10 000 l/dobę (X2) i eksperymencie trwający, 4 tygodnie (X3).
Źródło:
Rocznik Ochrona Środowiska; 2019, Tom 21, cz. 1; 316-329
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use the doe method for tool durability increase
Autorzy:
Dulina, Luboslav
Bigošová, Eleonóra
Barbušová, Miroslava
Gašo, Martin
Šeligová, Michala
Powiązania:
https://bibliotekanauki.pl/articles/104070.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
DOE
DMAIC
durability
removable cutting plate
metoda DOE
trwałość
wyjmowana płyta tnąca
Opis:
Constantly improving, which is one of the principles of quality management is the base for good understanding, behaviour of individual processes, investigating variability and impact on its the process. The aim of every business is to increase profits. Reducing the cost of tools can also contribute to this. Utilising the DOE method to reduce the durability of removable cutting plate, as describe the article, is one of way, how to apply this method in practice. The DOE method enables find factors that are the most relevant to the production process and determine their best values. Using this method, you can set the selected inputs so that, the process achieves the desired results with maximum stability and resilience. The article contains a brief overview of Minitab software by which the collected process data was analysed. The core of the article describes how to solve the problem using the singular phases of the DMAIC cycle. Each of these phases has its own specific aim, which logically defines what activities each step is aimed at. DMAIC is extended variant of the process improvement model based at the Deming circle PDCA. Six sigma methodology is used as a standard procedure for project planning and realisation. At the end of an article is described that by increase durability of removable cutting plate the problems found in the analysis of the current condition that have been validated by a case study in the company have been eliminated.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 559-566
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the Design of Experiments theory in laboratory... classes for future science teachers
Autorzy:
Nodzyńska, Małgorzata
Kopek-Putała, Wioleta
Powiązania:
https://bibliotekanauki.pl/articles/472610.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
DOE theory
Designing Chemical Experiments
laboratory
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Biologiae Pertinentia; 2018, VIII; 112-117
2083-7267
2450-3487
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Biologiae Pertinentia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental studies for bearings degradation monitoring at an early stage using analysis of variance
Autorzy:
Zarour, D.
Meziani, S.
Thomas, M.
Powiązania:
https://bibliotekanauki.pl/articles/328396.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
ANOVA
DOE
time descriptors
bearing fault
analiza wariancji
łożysko
usterka
deskryptory czasu
Opis:
This work presents a procedure for bearing degradation monitoring at an early stage. The analysis of variance (ANOVA) coupled with Tukey’s test is used to single out the suitable parameters to follow the fault size evolution ranging from 50 µm to 150µm. The Tukey's criterion is adopted in this case to study the ability of time and frequency indicators. The rotational speed, centrifugal load and fault size are considered as independent variables while the time and frequency indicators are taken as dependent variables. The experiments are performed on bearings having a fault on outer race. Based on the results of this study, the Kurtosis and Skewness show a good ability to assess the evolution of degradation in the bearings at an early stage. The paper discusses the weakness of the time and frequency indicators.
Źródło:
Diagnostyka; 2018, 19, 4; 81-87
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
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