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Wyświetlanie 1-43 z 43
Tytuł:
Some Construction of Factorial Designs
O pewnej konstrukcji planów eksperymentów czynnikowych
Autorzy:
Szerszunowicz, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/905776.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Design of experiments
Factorial design
Sequence of experiments
Opis:
Design of experiments methods are an important tool to improve production processes using statistical methods. Designing experiments allows to set factors of the production process as well as describe the influence of factors on the results. Furthermore, the design methods of experiments help to improve economic results of the analyzed process. The aim of this paper is the issue of choosing the optimal layout of experiments when the experimenter, because of the cost or conditions, has no possibility to implement the completion of the design of experiments. The method to determine successively points of a design will be suggested to carry out an experiment. Finally, implementation of the mentioned method will be presented for selected factorial designs.
Metody planowania eksperymentów są istotnym narzędziem doskonalenia procesów produkcyjnych wykorzystującym metody probabilisyczne i statystyczne. Planowanie eksperymentów pozwala na odpowiednie ustawienie parametrów procesu produkcyjnego oraz określenie wpływu czynników na jego wyniki. Ponadto metody planowania eksperymentów umożliwiają poprawę ekonomicznych rezultatów badanego procesu. Przedmiotem niniejszego artykułu jest zagadnienie wyboru optymalnego układu doświadczeń wówczas, gdy eksperymentator, ze względu na koszty bądź warunki, nie ma możliwości realizacji kompletnego planu doświadczeń. Zaproponowana zostanie metoda wyznaczania kolejnych punktów planu, w których należy przeprowadzić doświadczenie. Zastosowania prezentowanej metody przedstawione zostaną dla wybranych planów eksperymentów czynnikowych. Własności metody zostały sprawdzone w analizach symulacyjnych.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2013, 285
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pozyskiwanie danych i projektowanie eksperymentów w technice nurkowej
Autorzy:
Kłos, R.
Powiązania:
https://bibliotekanauki.pl/articles/366564.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
projektowanie eksperymentów
design of experiments
Opis:
Inwestowanie w prace prowadzone metodą błądzenia przypadkowego najczęściej jest nieopłacalne, dlatego poszukiwanie optymalnych i użytecznych rozwiązań wymaga szybkiego prowadzenia efektywnych badań. W ich planowaniu pomocne mogą być metody statystyki matematycznej. Materiał zawarty w artykule opracowano w ramach pracy pt.: "System głębokowodnych nurkowań trimiksowych ".
Investing in research using the method of accidental erring is most often highly unprofitable due to the need for quick and efficient tests and decisions. That is why today scientists look for optimal and more efficacious statistical methods for research design. This paper presents the result of a project entitled: "Deep Diving Trimix System", sponsored by the Naval Academy, Gdynia.
Źródło:
Polish Hyperbaric Research; 2005, 4(13); 25-53
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Completely balanced block designs with nonuniform block dimension
Autorzy:
Ceranka, Bronisław
Powiązania:
https://bibliotekanauki.pl/articles/747485.pdf
Data publikacji:
1977
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Block designs,Design of experiments,Statistics
Opis:
Artykuł nie zawiera streszczenia
The article contains no abstract
Źródło:
Mathematica Applicanda; 1977, 5, 11
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A calculation model for liquid-liquid extraction of protactinium by 2,6-dimethyl-4-heptanol
Autorzy:
Knight, A. W.
Eitrheim, E. S.
Nelson, A. W.
Schultz, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/146380.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
design of experiments
protactinium
solvent extraction
Opis:
Reprocessing of spent nuclear fuel usually employs the solvent extraction technique to recover fissile material, isolate other valuable radionuclides, recover precious metals, and remove contaminants. Effi cient recovery of these species from highly radioactive solutions requires a detailed understanding of reaction conditions and metal speciation that leads to their isolation in pure forms. Due to the complex nature of these systems, identification of ideal reaction conditions for the efficient extraction of specific metals can be challenging. Thus, the development of experimental approaches that have the potential to reduce the number of experiments required to identify ideal conditions are desirable. In this study, a full-factorial experimental design was used to identify the main effects and variable interactions of three chemical parameters on the extraction of protactinium (Pa). Specifi cally we investigated the main effects of the anion concentration (NO3 –, Cl–) extractant concentration, and solution acidity on the overall extraction of protactinium by 2,6-dimethyl-4-heptanol (diisobutylcarbinol; DIBC) from both HCl and HNO3 solutions. Our results indicate that in HCl, the extraction of protactinium was dominated by the solution acidity, while in nitric acid the extraction was strongly effected by the [DIBC]. Based on our results, a mathematical model was derived, that describes the relationship between concentrations of anions, extractant, and solution acidity and the expected values of Pa distribution coefficients in both HCl and HNO3. This study demonstrates the potential to predict the distribution coefficient values, based upon a mathematical model generated by a full-factorial experimental design.
Źródło:
Nukleonika; 2015, 60, No. 4, part 2; 837-845
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ON THE BOOTSTRAP METHOD OF ESTIMATION OF RESPONSE SURFACE FUNCTION
Autorzy:
Szerszunowicz, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/655866.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
design of experiments
response surface function
bootstrap
Opis:
Nowadays, in many fields of science it is necessary to carry out miscellaneous analyses using classical statistical methods, which usually have correct assumptions. These assumptions in the research realities cannot always be met, which makes it impossible to carry out analyses and leads to incorrect conclusions and recommendations. The study of the production process largely consists in the use of tools of statistical quality control which are based on classical statistical methods. These methods result in some improvements in technological and economic results of the manufacturing process. One of the tools of statistical quality control is the design of experiments, whose important element is the estimation of response surface function. The aim of this paper is to present the bootstrap method of estimation of response surface function and its use for empirical data.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2014, 3, 302
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the search for conditions for production process optimization
Autorzy:
Szerszunowicz, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/584920.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
design of experiments
response surface function
optimal design
Opis:
The experimental design methodology mainly deals with the estimation of a usually unknown response surface function. An important problem in the field of design of experiments is to determine the number of experimental trials, taking into account certain limitations resulting from the nature of the manufacturing process. The experimental design methodology also includes – as if a separate section – methods of searching for conditions for the optimization of processes and the optimal design of experiments. The aim of this paper is to present a method of searching for conditions for the optimization of manufacturing process results. The proposed method uses non-classical statistical methods and is presented for selected empirical data.
Źródło:
Mathematical Economics; 2014, 10(17); 91-102
1733-9707
Pojawia się w:
Mathematical Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of ultimate compressive strength of cracked plates with the use of doe techniques
Autorzy:
Woloszyk, Krzysztof
Garbatov, Yordan
Powiązania:
https://bibliotekanauki.pl/articles/1585013.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
cracks
Design of Experiments
plate
ultimate strength
FEM
Opis:
The objective of this work is to investigate the structural compressive response of plates with locked cracks accounting for all relevant factors and correlation between them. The nonlinear FE model considering both geometric and material nonlinearities is employed herein, and the FE model of the structural response of intact plates is validated with the available experimental data. In the common studies, based on One Factor at a Time analysis, some of the parameters and interactions between them are excluded. In the present study, the numerical investigations are conducted with the use of the Design of Experiments techniques, where all essential parameters and their interactions are adequately considered. With a total of 32 numerical analyses, the most influential factors and their interactions are identified. As a study outcome, empirical formulations, which allow for a fast estimation of the ultimate compressive strength of intact plates, plates with locked cracks, and repaired cracked plates, are derived. The developed formulations represent a fast and practical tool for estimating the ultimate compressive strength of intact, cracked, and repaired plates, which can be easily employed in the reliability analysis.results followed by their discussion.
Źródło:
Polish Maritime Research; 2020, 3; 109-120
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical approach to the production of cement composites doped with ZnO and ZnO-based materials
Autorzy:
Klapiszewska, Izabela
Balicki, Sebastian
Wilk, Kazimiera A.
Klapiszewski, Łukasz
Ślosarczyk, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/24085675.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cement composite
zinc oxide
hybrid materials
design of experiments
Opis:
In this study, physical and functional properties of the cement composites containing ZnO, ZnO/lignin and lignin admixtures were investigated using Response Surface Methodology (RSM). The I-optimal design based on RSM was used to assess the influence of ZnO-based doping agent, of either commercial or synthetic origin, on cement composite production in the function of average compressive strength and cost. Polynomial mathematical models were developed by RSM confronting results from the experimental design. The accuracy and precision of the utilized models established by I-optimal design were tested using Analysis of Variance (ANOVA). The first stage of formulation optimization revealed that the use of commercially available ZnO-based admixture no. 4 (ZnO-SA, supplied by Sigma Aldrich) allowed to achieve the desired results, passing all the requirements, i.e., the best microbial purity combined with reasonable cost, followed by satisfactory physical properties. In the second stage of formulation optimization, the influence of implementing the hybrid materials, i.e., ZnO-SA mixed in different proportions with lignin was evaluated. RSM revealed that doping admixture no. 3, i.e., ZnO-SA/lignin (5:1), is the best candidate, which comprised augmented functional and physical properties of the fabricated cement composite. This component exhibited the best microbial purity as well as the lowest total pore volume, followed by satisfactory physical properties. Verification of the model findings indicated considerable agreement between the predicted and experimental values. From the findings, it was confirmed that a reasonable cost-performance balance for cement composites can be achieved using ZnO-SA and ZnO-SA/lignin (5:1).
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 168352
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultimate compressive strength assessment of uncleaned and cleaned corroded plates with locked crack
Autorzy:
Woloszyk, Krzysztof
Garbatov, Yordan
Powiązania:
https://bibliotekanauki.pl/articles/1955587.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
cracks
corrosion
Design of Experiments
plate
ultimate strength
FEM
Opis:
The work presented here investigates the structural response of cleaned corroded plates, subjected to compressive load in the presence of a locked crack, where the change of mechanical properties as a result of corrosion development and the cleaning process is also accounted for. A Finite Element model for assessing the compressive strength, considering geometric and material nonlinearities, is developed, and the analysed plates are compared with the available experimental data. An experimental design plan is generated using the Design of Experiments techniques, which quantifies the influence of the governing variables and their interactions with respect to the plate’s ultimate compressive strength. With a limited number of observations, the most significant effects are identified. The corrosion degradation is revealed to be the most crucial effect leading to an effective strength reduction. It was found that, in the case of a corroded plate with a locked crack subjected to a compressive load, the most severe case is when the crack is transversely oriented. The strength reduction is slightly lower than when the corrosion degradation and the presence of a crack are considered to be a simple summation of these two effects but acting separately. The outcome of the analysis is the development of several empirical formulations that allow a fast estimation of the ultimate strength of a corroded plate, subjected to compressive load in the presence of a locked crack, accounting for different cleaning.
Źródło:
Polish Maritime Research; 2021, 3; 117-127
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Welding Parameters on FSSW: Experimental and Numerical Study
Autorzy:
Merzoug, M.
Boulenouar, A.
Bouchouicha, B.
Serrier, M.
Mazari, M.
Powiązania:
https://bibliotekanauki.pl/articles/355978.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FSSW
penetration
rotation of the tool
temperature
design of experiments
Opis:
In this paper, the Aluminum A6060-T5 plates of thickness 2 mm was friction stir spot welded (FSSW), and the effects of welding parameters (rotation speed, plunge speed and distance from the center of pin) on the temperature variation of the joints were investigated. The experimental design method is used to investigate the effects of welding parameters in order to achieve an optimization of the FSSW process. This optimization allows the development of experimental results and may help to better understand the complexity of the phenomena resulting from contact parts/tool during the stirring process.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 247-256
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
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:
Experimentation and Prediction of the Wear of a Cutting Tool in Turning Process
Autorzy:
Merzoug, M.
Benamara, N.
Boulenouar, A.
Bouchouicha, B.
Mazari, M.
Powiązania:
https://bibliotekanauki.pl/articles/356451.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
turning
cutting parameters
tool wear
surface roughness
design of experiments
Opis:
In the present work, the performance of multilayer coated carbide tool was investigated considering the effect of cutting parameters during turning of 34CrMo4 Low alloy steel. It has high strength and creep strength, and good impact tenacity at low temperature. It can work at –110°C to 500°C. And EN 10083-1 34CrMo4 owns high static strength, impact tenacity, fatigue resistance, and hardenability; without overheating tendencies. The objective functions were selected in relation to the parameters of the cutting process: surface roughness criteria. The correlations between the cutting parameters and performance measures, like surface roughness, were established by multiple linear regression models. Highly significant parameters were determined by performing an Analysis of variance (ANOVA). During the experiments flank wear, cutting force and surface roughness value were measured throughout the tool life. The results have been compared with dry and wet-cooled turning. Analysis of variance factors of design and their interactions were studied for their significance. Finally, a model using multiple regression analysis between cutting speed, fee rate and depth of cut with the tool life was established.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 563-573
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of a two stages electrostatic air precipitation process using response surface modeling
Autorzy:
Berrached, D.
Tilmatine, A.
Miloua, F.
Bengrit, M.
Powiązania:
https://bibliotekanauki.pl/articles/141038.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
two-stage ESP
design of experiments
experimental modelling
electrostatic precipitator
Opis:
Any industrial process needs to work with the optimal operating conditions and thus the evaluation of their robustness is a critical issue. A modeling of a laboratoryscale wire-to-plane two stages electrostatic precipitator for guiding the identification of the set point, is presented this in paper. The procedure consists of formulating recommendations regarding the choice of optimal values for electrostatic precipitation. A twostages laboratory precipitator was used to carry out the experiments, with samples of wood particles of average granulometric size 10 μm. The parameters considered in the present study are the negative applied high voltage of the ionization stage, the positive voltage of the collection stage and the air speed. First, three “one-factor-at-a-time” experiments were performed followed by a factorial composite design experiments, based on a two-step strategy: 1) identify the domain of variation of the variables; 2) set point identification and optimization of the process.
Źródło:
Archives of Electrical Engineering; 2014, 63, 4; 609-619
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Laser Processing Parameters on the Properties of Electro-Spark Deposited Coatings
Autorzy:
Radek, N.
Szczotok, A.
Gądek-Moszczak, A.
Dwornicka, R.
Bronček, J.
Pietraszek, J.
Powiązania:
https://bibliotekanauki.pl/articles/354845.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electro-spark deposition
laser treatment
material properties
coating
design of experiments
Opis:
The paper described properties of electro-spark deposited coatings under influence of the laser treatment process. The properties were assessed by analyzing the coating microstructure, X-ray radiation, microhardness, bonding strength, corrosion resistance, porosity and wear tests. The tests were conducted for Mo and Cu coatings (the anode) which were electro-spark deposited over the C45 steel substrate (the cathode) and melted with a laser beam. The coatings were deposited by means of an ELFA-541. The laser processing was performed with an Nd:YAG laser. The coatings after laser processing are still distinguished by very good performance properties, which make them suitable for use in sliding friction pairs.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 809-816
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Studies of Electrospinning and Solution Blow Spinning Processes for the Production of Nanofibrous Poly(L-Lactic Acid) Materials for Biomedical Engineering
Autorzy:
Wojasiński, M.
Pilarek, M.
Ciach, T.
Powiązania:
https://bibliotekanauki.pl/articles/778423.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
electrospinning
solution blow spinning
nanofibers
biomedical engineering
design of experiments
biocompatibility
Opis:
Comparative statistical analysis of the infiuence of processing parameters, for electrospinning (ES) and solution blow spinning (SBS) processes, on nanofibrous poly(L-lactic acid) (PLLA) material morphology and average fiber diameter was conducted in order to identify the key processing parameter for tailoring the product properties. Further, a comparative preliminary biocompatibility evaluation was performed. Based on Design of Experiment (DOE) principles, analysis of standard effects of voltage, air pressure, solution feed rate and concentration, on nanofibers average diameter was performed with the Pareto’s charts and the best fitted surface charts. Nanofibers were analyzed by scanning electron microscopy (SEM). The preliminary biocompatibility comparative tests were performed based on SEM microphotographs of CP5 cells cultured on materials derived from ES and SBS. Polymer solution concentration was identified as the key parameter infiuencing morphology and dimensions of nanofibrous mat produced from both techniques. In both cases, when polymer concentration increases the average fiber diameter increase. The preliminary biocompatibility test suggests that nanofibers produced by ES as well as SBS are suitable as the biomedical engineering scaffold material.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 2; 43-50
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determing co-operation characteristics of the naval gas turbine with power receiver using the technique of planning experiment
Autorzy:
Pojawa, B.
Borsuk, K.
Powiązania:
https://bibliotekanauki.pl/articles/246805.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
characteristics of the naval gas turbine
design of experiments
experiment design
naval gas turbine
Opis:
The process of exploitations naval gas turbines bases on their characteristics, in this on characteristic of co-operation of engine with power receiver. In particular, if a controllable pitch propeller is it. The ship’s documentation does not often contain that kind of characteristic. There is need the study of method her determine therefore. It undertaking the test of determination the characteristic of co-operation of chosen naval gas turbines with power receiver, it was decided to execute in analytic way, using the technique of planning experiment which also allows for efficient and effective testing. Taking preliminary character of examinations into account they decided to carry them out on the laboratory position with the gas turbine engine GTD-350 and single-stage reduction gearing H-564 co-operating with Froude HWZ-3 water brake. In the article theoretical bases of planning experience, a manner of preliminary implementations of studies as well as their results were presented. It the investigation of adequacy for received results of investigations was conducted, in this statistical and technical analysis. The conclusions on basis of received results of investigations of adequacy were expressed.
Źródło:
Journal of KONES; 2012, 19, 3; 345-353
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Process parameter optimization of Laser Micrometallurgy of AZ31 alloy
Autorzy:
Pawlak, A.
Chlebus, E.
Powiązania:
https://bibliotekanauki.pl/articles/1190023.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
SLM
stop magnezu
projektowanie eksperymentu
porowatość
magnesium alloy
design of experiments
porosity
Opis:
This paper presents process optimization results of laser powder micrometallurgy of AZ31 alloy, for eliminating porosity in melted material. Full factorial design of three factors at three levels was conducted, and the influence of laser beam power, point distance and exposure time was examined.
Źródło:
Interdisciplinary Journal of Engineering Sciences; 2015, 3, 1; 10--15
2300-5874
Pojawia się w:
Interdisciplinary Journal of Engineering Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The bootstrap method as a tool to improve the design of experiments
Autorzy:
Dwornicka, Renata
Radek, Norbert
Pietraszek, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/88607.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
bootstrap
statistics
design of experiments
numerical simulation
statystyka
projektowanie eksperymentów
symulacje numeryczne
Opis:
The paper considers the use of the bootstrap method to improve the determination of confidence intervals identified by the DOE (design of experiment) procedure. Two different approaches have been used: one that is appropriate for factorial designs and the other one relevant to the methodology of the response surface. Both approaches were tested on the real experiment datasets and compared with the results obtained from the classical statistical expressions based on well known asymptotic formulas derived from the distribution.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 724-729
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of specific process parameters and ultrasonically activated injection affecting the quality of filling in thin walled plastic parts
Autorzy:
Adam, A.
Stan, D.
Tulcan, A.
Powiązania:
https://bibliotekanauki.pl/articles/279228.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
ultrasonic activation
design of experiments
rheological behavior of polymer
thin-walled plastic parts
Opis:
The paper presents a set of experiments focused on the study of rheological behavior of a polymer flowing through a narrow section at the forming by injection of thin-walled plastic parts. The paper addresses the use of ultrasonically activated injection for fabrication of polymeric parts with thin wall features. In the experiment, a part with six different geometric features has been created. The design-of-experiments approach is applied to correlate the quality of the parts with the processing parameters. Four processing parameters are investigated using a screening factorial experimentation plan to determine their possible effect on the filling quality of the moulded parts. The experiments have been conducted on a hot runner mould with two nests in which the final (nest) nozzle has been modified to host, as the central element, the ultrasonic horn of a sonic system. It has been found that the ultrasonic activation applied on the active part of the mould does not play an important role as a stand-alone factor but could amplify or strengthen the effect of classical setting parameters (and influence factors) of the process: the melt temperature and injection pressure. Because it is easier to stimulate and to control rheological properties of the melt by setting the intensity of ultrasonic energy and, more important, the effect is forthwith, the paper recommends the runner systems with ultrasonic activation as an alternative for the hot runner with heating elements.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 4; 799-809
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O wykorzystaniu metod planowania eksperymentów czynnikowych w konstrukcji indeksów statystycznych
Use of design of experiments methods in the construction of statistical indexes
Autorzy:
Złotoś, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/592349.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Indeksy statystyczne
Plany eksperymentów czynnikowych
Płace
Design of experiments
Factorial design of experiment
Statistical indexes
Opis:
Metodologia planowania eksperymentów znajduje zastosowanie w projektowaniu procesu produkcyjnego, pozwalając na poprawę jego rezultatów technologicznych i ekonomicznych. Plany eksperymentów wykorzystywane są również w naukach przyrodniczych oraz pozwalają na modyfikację istniejących metod statystycznych. W teorii indeksów statystycznych poszukuje się takiej postaci indeksów dla wielkości absolutnych, które pozwoliłyby na ich właściwą interpretację ekonomiczną, a jednocześnie spełniałyby odpowiednie aksjomaty. Wśród podejść w konstrukcji indeksów statystycznych dla wielkości absolutnych wymienia się ujęcie czynnikowe zaproponowane w 1961 r. przez K.S. Banerjeego. W niniejszym artykule przedstawiono konstrukcję indeksów statystycznych dla wielkości stosunkowych z wykorzystaniem podejścia czynnikowego. Ponadto zaprezentowano przykład empiryczny, pozwalający zweryfikować własności zaproponowanych indeksów statystycznych.
Methods of design of experiments, as a tool of statistical quality control, leads to the improvement of technological and economical results of a manufacturing process. Currently design of experiments are used also in natural sciences and allows for the modification of existing statistical methods. In the theory of statistical indexes, one of the approaches of the construction of statistical indexes is the factorial approach proposed in 1961 by K. Banerjee. The aim of this article is to present the construction of statistical indexes for relative magnitudes using a factorial approach. In addition, an empirical example will be presented to verify the properties of the proposed indexes.
Źródło:
Studia Ekonomiczne; 2017, 335; 91-100
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The smoothed bootstrap fine-tuning
Autorzy:
Dwornicka, Renata
Goroshko, Andrii
Pietraszek, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/88564.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
smoothed bootstrap
statistic
design of experiments
numerical simulation
projektowanie eksperymentów
statystyka
symulacja numeryczna
Opis:
The bootstrap method is a well-known method to gather a full probability distribution from the dataset of a small sample. The simple bootstrap i.e. resampling from the raw dataset often leads to a significant irregularities in a shape of resulting empirical distribution due to the discontinuity of a support. The remedy for these irregularities is the smoothed bootstrap: a small random shift of source points before each resampling. This shift is controlled by specifically selected distributions. The key issue is such parameter settings of these distributions to achieve the desired characteristics of the empirical distribution. This paper describes an example of this procedure.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 716-723
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality engineering implementation in an organization: a brief finding on QE methodology
Autorzy:
Dolah, R.
Miyagi, Z.
Tatebayashi, K.
Powiązania:
https://bibliotekanauki.pl/articles/406750.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Quality Engineering
Taguchi method
design of experiments
DOE
T-peel test
product robustness
Opis:
As many research focused on robustness methodology, this paper discuss on how to implement these methodology concept from the management perspective. Guidelines and appropriate strategies are discussed on Quality Engineering (QE) implementation in an organization and experimentation. Firstly, the experience of a company implementing QE is presented. Secondly, the practical data of a laboratory experiment is discussed in order to relate between the experimental result and requirement in industry. The QE implementation is explained on the strategies used in tackling organization problems. Optimization of peel adhesion strength test is carried out to propose the feasibility of experimental design tools. QE methodology between the practical case and company's case study is compared. Finally, through the QE implementation in organization and method applied in experimental design, a framework is proposed for QE methodology. QE implementation is presented from two sources, from a company and practical case study point of view. It helps a researcher or engineer applies the management strategy and engineering tool to ensure product robustness.
Źródło:
Management and Production Engineering Review; 2012, 3, 4; 26-34
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
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:
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:
A Design of Experiments for Statistically Predicting Risk of Adverse Health Effects on Drivers Exposed to Vertical Vibrations
Autorzy:
Ayari, H.
Thomas, M.
Dore, S.
Powiązania:
https://bibliotekanauki.pl/articles/90147.pdf
Data publikacji:
2011
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
adverse health effect
whole-body vibration
spinal loading
finite element analysis
ageing
design of experiments
Opis:
An injury risk factor (IRF), which indicates the risk of adverse health effect to lumbar rachis arising from mechanical vibrations, is developed. Experiments have been conducted that consider acceleration levels at the seat of drivers, posture, morphology, density, damping rate and body mass as independent variables. A parametric finite-element model of the lumbar rachis has been generated. It is shown that the IRF increases with ageing and an IRF of 30% is proposed as a threshold for fatigue purposes. This level is reached if a peak acceleration level greater than 3 m/s2 is applied to a light (55 kg) and an old driver with a low bone density and a damping rate of 20%. This vibration threshold must be reduced to 2.7 m/s2 if the driverʼs weight increases to 75 kg and to 2 m/s2 if the driver is heavy (98 kg).
Źródło:
International Journal of Occupational Safety and Ergonomics; 2011, 17, 3; 221-232
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O kosztach realizacji planów eksperymentów czynnikowych
On the costs of realization of factorial design of experiment
Autorzy:
Chmielińska, Magdalena
Szerszunowicz, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/590918.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Koszty kontroli jakości
Plany eksperymentów czynnikowych
Plany ułamkowych eksperymentów czynnikowych
Costs
Design of experiments
Fractional factorial design
Opis:
Planowanie eksperymentów jako metoda statystycznej kontroli jakości umożliwia właściwe przygotowanie procesu produkcyjnego poprzez ustalenie poziomów czynników oraz określenie ich wpływu na efekty realizowanego procesu. Metoda ta jest chętnie stosowana w przedsiębiorstwach, gdyż tylko prawidłowo ustawiony proces przebiega bez zakłóceń. Skutkuje to zmniejszoną liczbą wytworzonych elementów wadliwych, czyli niższymi kosztami braków wewnętrznych i zewnętrznych. Stosowanie planowania eksperymentów wymaga jednak ponoszenia pewnych nakładów finansowych. Celem niniejszego artykułu jest przedstawienie struktury kosztów ponoszonych przez przedsiębiorstwo w związku z zastosowaniem narzędzia planowania eksperymentów oraz wskazanie możliwości takiego zaplanowania eksperymentu czynnikowego, by koszty te były minimalizowane. W artykule zaprezentowany zostanie algorytm realizacji planu eksperymentu czynnikowego uwzględniający koszty jego przeprowadzenia. Koszty przeprowadzenia eksperymentu utworzonego zgodnie z proponowaną metodą zostaną porównane z kosztami realizacji klasycznych planów eksperymentów czynnikowych.
Design of experiments as a method of statistical quality control enables proper planning and preparation of the production process by determining the levels of the factors and to determine their impact on the effects of realized process. This method is readily applicable in enterprises, as only correctly set process running smoothly. This results in a reduced number of produced defective elements, i.e. lower costs of internal and external lacks. The use of factorial design, however, requires incurring some financial outlay. The purpose of this article is to present the structure of the costs incurred by companies in connection with the use of the factorial design and to indicate possibilities of such planning factorial experiment that the costs were minimized. In the paper will be presented an algorithm of implementation fractional factorial design taking into account the cost of its maintenance. The proposed method of carrying out the design will be compared with the costs of implementation classical factorial design.
Źródło:
Studia Ekonomiczne; 2015, 219; 65-78
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical evaluation into the practical utility of the Design of Experiments
Autorzy:
Sharma, Mithun
Sharma, Shilpi
Powiązania:
https://bibliotekanauki.pl/articles/2086449.pdf
Data publikacji:
2021
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
Six-Sigma
design of experiments
screening
Taguchi screening
full factorial
projektowanie eksperymentów
klasyfikowanie
Taguchi klasyfikacja
silnia
Opis:
The research aims to emphasise the relevance of the Design of Experiments (DOE) technique as a reliable method for ensuring efficient use of statistical methods in routine industrial processes. A case study approach with a deductive strategy was used to assess the effectiveness of different DOE methods to achieve the desired objectives. Screening, mid-resolution and high-resolution DOE methods helped identify, characterise, and optimise an experimental variable against the desired output response. A general framework for effective DOE is provided as part of DOE planning, including defining DOE objectives, selection criteria, noise reduction, and application across industries. Overall, various DOE models proved successful in identifying a complicated relationship between experimental variables and output response. However, when ideal DOE models may not be feasible, reducing test run by choosing lower resolution DOE or fewer replicates can still provide important insights into the experimental variables’ impact on output responses.
Źródło:
Engineering Management in Production and Services; 2021, 13, 3; 50--65
2543-6597
2543-912X
Pojawia się w:
Engineering Management in Production and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination the effect of factors affecting the tensile strength of fabric conveyor belts
Ocena wpływu czynników na wytrzymałość na rozciąganie taśm przenośnikowych tkaninowo – gumowych
Autorzy:
Ambriško, L.
Marasová, D.
Grendel, P.
Powiązania:
https://bibliotekanauki.pl/articles/301577.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
mechanical testing
tension
conveyor belt
DOE method (Design of Experiments)
testy mechaniczne
napięcie
taśma przenośnikowa
metoda DOE
Opis:
The Design of experiment (DOE) method was used in this paper to rubber conveyor belt tension testing. Using DOE method were from experimentally obtained data established effects of factors and interactions that affect the value of the measured strength and also were determined regression models, which apply input and output variables to the relation. The regression model presents the complete multifactor experiment that contains main factors and interactions.
Metoda planowania eksperymentu (DOE) w artykule użyta do testowania napięcia taśm przenośnikowych tkaninowo – gumowych. Korzystanie z metody DOE były ustalonych poszczególnych czynników oraz ich interakcji ze danych uzyskanych w sposób doświadczalny. Czynniki i interakcje wpływające na wartość zmierzonej wytrzymałośći, a także określono modele regresji, wykazającego związki pomiędzy zmiennymi wejściowymi i wyjściowymi. Model regresyjny przedstawia kompletny wieloczynnikowy eksperyment obejmujący podstawowe zmienne oraz ich interakcje.
Źródło:
Eksploatacja i Niezawodność; 2016, 18, 1; 110-116
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the design of experiments in the epoxidation process of 1,5,9-cyclododecatriene
Autorzy:
Lewandowski, G.
Ćwirko, J.
Powiązania:
https://bibliotekanauki.pl/articles/778595.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
epoksydowanie
planowanie doświadczeń
1,5,9-cyklododekatrien
optymalizacja
epoxidation
design of experiments
1,5,9-cyclododecatriene
optimization
Opis:
An influence of the molar ratio of cis, trans, trans-1,5,9-cyclododecatriene to tert-butyl hydroperoxide, the concentration of the catalyst and the reaction time on the performance of the epoxidation process of cis, trans, trans-1,5,9-cyclodecatriene with tert-butyl hydroperoxide at the presence of molybdenum hexacarbonyl Mo(CO)6 was examined. Examinations were performed using statistical methods of the design of experiments. A mathematical model describing the influence of the parameters on conversion cis, trans, trans-1,5,9-cyclododecatriene was obtained. An analysis of the data and rests was performed and an optimal value of conversion of cis, trans, trans-1,5,9-cyclododecatriene was established.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 4; 68-71
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelowanie procesu separacji elektrostatycznej wybranych mieszanin polimerowych
Modeling of electrostatic separation process for some polymer mixtures
Autorzy:
Żuk, T.
Pietraszak, J.
Żenkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/947279.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
separacja elektrostatyczna
tworzywa biodegradowalne
planowanie doświadczeń
PLA
PCL
PVC
PET
electrostatic separation
biodegradable polymers
design of experiments
Opis:
Przedstawiono wyniki badań procesu separacji elektrostatycznej mieszanin polilaktydu (PLA) zpoli(ε-kaprolaktonem) (PCL), PLA zpoli(chlorkiem winylu) (PVC) iPLA zpoli(tereftalanem etylenu) (PET). Oceniono cztery wielkości wejściowe procesu, mające podstawowy wpływ na efekty separacji elektrostatycznej badanych mieszanin: udział masowy poszczególnych składników mieszaniny, czas elektryzowania fluidyzacyjnego, różnicę potencjałów między elektrodami oraz prędkość obrotową elektrody walcowej. Opracowano, anastępnie przeanalizowano modele matematyczne procesu separacji elektrostatycznej badanych mieszanin. Stwierdzono, że otrzymane modele matematyczne separacji elektrostatycznej mieszanin PLA, PCL, PVC iPET można wykorzystać praktycznie do analizy efektywności rozdziału tych mieszanin.
The results of investigations of electrostatic separation of mixtures of polylactide (PLA) with poly(ε-caprolactone) (PCL) and PLA with poly(vinyl chloride) (PVC) or poly(ethylene terephthalate) (PET) are presented. Four input quantities of the process, having abasic influence on the effects of electrostatic separation of the investigated mixtures, were examined: (a) mass fraction of the individual components, (b) fluidized-bed charging time, (c) potential difference between the electrodes, (d) rotational speed of the roll electrode. The mathematical models of electrostatic separation process of PLA, PCL, PVC and PET mixtures were developed and analyzed. It was found that these models can be used in practice for analysis of separation of these mixtures.
Źródło:
Polimery; 2016, 61, 7-8; 519-527
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of temperature and time of sewage sludge incineration on the mobility of heavy metals
Autorzy:
Latosińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/208265.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
design of experiments
heavy metals
incineration
sewage sludge
soil moisture
spalanie
projektowanie eksperymentu
metale ciężkie
osady ściekowe
wilgotność gleby
Opis:
Sewage sludge ashes in comparison to sewage sludge are characterized by higher concentrations of heavy metals. The mobility of heavy metals in sewage sludge ashes determines their impact on the soil-water environment in the aspect of toxicology. This research statistically evaluates the influence of temperature and duration of SS incineration on the mobility of HM from SSA. For the incineration temperatures 600–980 °C and 2–20 min of incineration, the experiment domain was defined in accordance with the Box’s two-factor experimental design. It was proved that it was not the time but the temperature of SS incineration that had the statistically relevant influence on the mobility of nickel and copper.
Źródło:
Environment Protection Engineering; 2017, 43, 4; 105-122
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and Optimization of Phenol Formaldehyde Resin Sand Mould System
Autorzy:
Chate, G. R.
Patel, M. G. C.
Parappagoudar, M. B.
Deshpande, A. S.
Powiązania:
https://bibliotekanauki.pl/articles/381857.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mould hardness
phenol-formaldehyde resin
permeability
desirability function approach
design of experiments
masy formierskie
żywica fenolowo-formaldehydowa
przepuszczalność
twardość
optymalizacja
Opis:
Chemical bonded resin sand mould system has high dimensional accuracy, surface finish and sand mould properties compared to green sand mould system. The mould cavity prepared under chemical bonded sand mould system must produce sufficient permeability and hardness to withstand sand drop while pouring molten metal through ladle. The demand for improved values of permeability and mould hardness depends on systematic study and analysis of influencing variables namely grain fineness number, setting time, percent of resin and hardener. Try-error experiment methods and analysis were considered impractical in actual foundry practice due to the associated cost. Experimental matrices of central composite design allow conducting minimum experiments that provide complete insight of the process. Statistical significance of influencing variables and their interaction were determined to control the process. Analysis of variance (ANOVA) test was conducted to validate the model statistically. Mathematical equation was derived separately for mould hardness and permeability, which are expressed as a non-linear function of input variables based on the collected experimental input-output data. The developed model prediction accuracy for practical usefulness was tested with 10 random experimental conditions. The decision variables for higher mould hardness and permeability were determined using desirability function approach. The prediction results were found to be consistent with experimental values.
Źródło:
Archives of Foundry Engineering; 2017, 17, 2; 162-170
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry 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:
Application of Taguchi method for the design of cement mortars containing waste materials
Autorzy:
Dębska, Bernardeta
Krasoń, Joanna
Lichołai, Lech
Powiązania:
https://bibliotekanauki.pl/articles/2065613.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska
Tematy:
rubber waste
cork waste
cement mortars
design of experiments
Taguchi method
odpady gumowe
korek
zaprawy cementowe
projektowanie doświadczeń
metoda Taguchi
Opis:
Industries related to the acquiring of building materials may soon face a shortage of natural resources and an associated increase in costs of their acquisition. Therefore, it is necessary to look for possible ways to reduce the exploitation of natural resources and instead use recycled raw materials. Such policies fit into one of the most important trends in modern construction, which is sustainable development. In the conducted research, the Taguchi method was utilized in order to investigate the impact of modifying cement mortars with rubber and cork waste on the selected properties of the obtained composites. Thanks to the above method, we managed to obtain the desired information about mortars in a shorter time and at a lower cost than using traditional testing methods. Using the selection in planning method, we confirmed that rubber waste can be a good substitute for sand in mortars.
Źródło:
Budownictwo o Zoptymalizowanym Potencjale Energetycznym; 2020, 9, 1; 15--26
2299-8535
2544-963X
Pojawia się w:
Budownictwo o Zoptymalizowanym Potencjale Energetycznym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozwój i osiągnięcia w biometrii polskiej
The development and achievements in Polish biometry
Autorzy:
Caliński, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/422866.pdf
Data publikacji:
2012
Wydawca:
Główny Urząd Statystyczny
Tematy:
biometria
planowanie i analiza doświadczeń
biometry
design and analysis of experiments
Opis:
Biometria jest dyscypliną naukową zajmującą się zastosowaniami metod matematycznych i statystycznych w rozwiązywaniu problemów biologicznych, zwłaszcza w planowaniu i ana-lizie eksperymentów. W Polsce pionierami biometrii było dwóch wybitnych uczonych. Antro-polog, Jan Czekanowski (1882-1965), oraz chemik, agrotechnik i hodowca roślin, Edmund Załęski (1863-1932). Jednym z uczniów Załęskiego był Stefan Barbacki, uczony o ogromnych osiągnięciach w zakresie rozwoju metodyki doświadczalnictwa rolniczego i biometrii. Jego działalność przyczyniła się do stworzenia poznańskiej szkoły statystyki matematycznej i bio-metrii. Podobnie rodziły się zainteresowania biometrią w innych polskich ośrodkach naukowych, zwłaszcza w Lublinie, dzięki Mikołajowi Olekiewiczowi i Wiktorowi Oktabie, w Warszawie, dzięki Jerzemu Spławie-Neymanowi i Zygmuntowi Nawrockiemu, oraz we Wrocławiu, dzięki Hugonowi Steinhausowi i Julianowi Perkalowi.
Biometry is a branch of science which deals with applications of mathematical and statistical methods to biological problems, particularly to the design and analysis of ex-periments. Two prominent scientists are considered as pioneers of biometry in Poland. An anthropologist, Jan Czekanowski (1882-1965), and a chemist, agricultural researcher and plant breeder, Edmund Załęski (1863-1932). One of Załęski’s followers was Stefan Barbacki, a scientist of great achievements in the development of agricultural research methodology and biometry. His activity contributed essentially to the formation of the Poznań school of mathematical statistics and biometry. The interest in biometry in other Polish scientific centers was initiated in a similar way. Particularly in Lublin, due to Mikołaj Olekiewicz and Wiktor Oktaba, in Warsaw, due to Jerzy Spława-Neyman and Zygmunt Nawrocki, and in Wrocław, due to Hugo Steinhaus and Julian Perkal (1913-1965).
Źródło:
Przegląd Statystyczny; 2012, 59, numer specjalny 1; 47-52
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Use of Permutation Tests in the Analysis of the Factorial Design of Experiment Results
O wykorzystaniu testów permutacyjnych w analizie wyników eksperymentów czynnikowych
Autorzy:
Złotoś, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/657104.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
test Tukey’a
test Fishera
planowanie eksperymentów
testy permutacyjne
Tukey’s test
design of experiments
permutation tests
Fisher Least Significant Difference Method
Opis:
Metody planowania eksperymentów są wykorzystywane w statystycznej kontroli jakości procesu produkcyjnego. Właściwe planowanie eksperymentów przed realizacją procesu produkcyjnego prowadzi do poprawy jego rezultatów technologicznych, co w efekcie powoduje poprawę rezultatów ekonomicznych procesu. W ostatnich latach na znaczeniu zyskały metody repróbkowania, wykorzystujące symulacje komputerowe. Jedną z nich są testy permutacyjne służące do weryfikacji hipotez statystycznych. W porównaniu do testów parametrycznych nie wymagają one spełnienia restrykcyjnych założeń i mogą być stosowane do niewielkiej liczby obserwacji. Przedmiotem artykułu jest wskazanie możliwości wykorzystania testów permutacyjnych w analizie wyników eksperymentu. Rozważania przeprowadzone zostały dla danych dotyczących rezultatów ustalonego procesu produkcyjnego.
An experimental design is one of the tools which are used in statistical quality control. The proper implementation of experimental design results in the improvement of technological outcomes of a manufacturing process, which in turn leads to the enhancement of economic results. Permutation tests, among other things, form a group of resampling methods which are used to verify statistical hypotheses. These tests, unlike parametric ones, do not entail the fulfilment of strict criteria and may be used for a small number of observations. The presented article deals with the use of permutation tests in the design of experiments. The proposed method will be presented with reference to selected empirical data.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2019, 4, 343; 123-136
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyznaczenie charakterystyki współpracy okrętowego turbinowego silnika spalinowego z odbiornikiem energii z wykorzystaniem techniki planowania eksperymentu
Determining co-operation characteristics of marine gas turbine engine with power receiver using methodology planning experiment
Autorzy:
Pojawa, B.
Borsuk, K.
Powiązania:
https://bibliotekanauki.pl/articles/222044.pdf
Data publikacji:
2012
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
charakterystyki okrętowych turbinowych silników spalinowych
planowanie doświadczeń
plan eksperymentu
okrętowy turbinowy silnik spalinowy
characteristics of marine gas turbine engine
design of experiments
experiment design
marine gas turbine engine
Opis:
Proces eksploatacji okrętowych turbinowych silników spalinowych opiera się na ich charakterystykach, w tym na charakterystyce współpracy silnika z odbiornikiem energii, szczególnie jeżeli odbiornikiem energii jest śruba o skoku nastawnym. Dokumentacja okrętowa często nie zawiera tego rodzaju charakterystyk. Istnieje zatem potrzeba opracowania metody jej wyznaczania. Podejmując się próby wyznaczenia charakterystyki współpracy wybranego turbinowego silnika spalinowego z odbiornikiem energii, postanowiono dokonać tego w sposób analityczny, z wykorzystaniem techniki planowania eksperymentu. Mając na uwadze wstępny charakter badań, postanowiono je wykonać na stanowisku laboratoryjnym z turbinowym silnikiem spalinowym GTD-350 współpracującym z hamulcem wodnym Froude’a. W artykule przedstawiono podstawy teoretyczne planowania doświadczeń, sposób realizacji badań wstępnych oraz ich wyniki. Dla otrzymanych wyników badań przeprowadzono badanie adekwatności, w tym analizę statystyczną i merytoryczną. Na podstawie otrzymanych wyników badań adekwatności sformułowano wnioski.
The process of operation of Marine turbine engines is based on their characteristics, including the characteristic of engine co-operation with the power receiver, especially if the receiver is a controllable pitch propeller. Ship documentation often does not cover this kind of characteristics. Therefore there is a need to work a method to determine it. Making an attempt to determine the co-operation characteristic of an engine with a power receiver it was decided to do it in an analytical way using experiment planning methodology. Bearing In mind the preliminary nature of the investigations it was decided to conduct them on a laboratory stand with a GTD-350 diesel engine co-operating with Froude water brake. The paper presents theoretical foundations for planning experiments, the way of conducting preliminary investigations and their results. The results obtained were checked for their adequacy, which included statistical and subject-matter analysis.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2012, R. 53 nr 2 (189), 2 (189); 103-122
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda rozmieszczania urządzeń pomiarowych i wykonawczych do celu diagnozowania wycieków w sieciach wodociągowych
Sensor and actuator placement for leakage diagnosis in water distribution systems
Autorzy:
Przystałka, P.
Wyczółkowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/257486.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
sieć wodociągowa
optymalizacja wielokryterialna
optymalne planowanie eksperymentów
przeszukiwanie systematyczne
algorytmy genetyczne
urban water networks
multiobjective optimisation
optimal design of experiments
systematic search
genetic algorithms
Opis:
W artykule opisano metodę określania konfiguracji czujników przepływu oraz reduktorów ciśnienia, optymalnej ze względu na działanie systemu detekcji i lokalizacji wycieków pojawiających się w sieciach wodociągowych. Metoda optymalizacji w głównej mierze opiera się na algorytmie przeszukiwania systematycznego oraz algorytmie genetycznym. W obu przypadkach funkcję celu/przystosowania utworzono na bazie miar wrażliwościowych oraz z zastosowaniem ogólnej teorii optymalnego planowania eksperymentów. Przeprowadzone badania weryfikacyjne potwierdziły poprawność zaproponowanego rozwiązania oraz jego przydatność praktyczną.
The paper deals with a method for configuring flow meter locations and reducing valve set-up points. These positions are optimal for acquiring information that is needed for fault detection and locating small leakage points in water distribution systems. The method is based on systematic search and genetic algorithms. For both approaches, the objective/fitness function was created with the use of sensitivity measures and optimal experimental design criterions. The verification of the delineated approach was conducted for a real-world water supply network. The achieved results confirmed the correctness of the proposed method.
Źródło:
Problemy Eksploatacji; 2011, 2; 141-151
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncommon applications of statistical methods of the design of experiments in chemical technology and environment protection
Autorzy:
Lewandowski, G.
Ćwirko, J.
Powiązania:
https://bibliotekanauki.pl/articles/778597.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
planowanie doświadczeń
optymalizacja
plany kompozycyjne centralne
barwniki
estryfikacja
fotoaktywność TiO2
design of experiments
optimization
central composite designs
dyes
esterification
TiO2 photoactivity
biodiesel
Opis:
The review of literature related to the applications of statistic methods of design of experiments in chemical technology and environment protection was presented in the work. The research that consists of two stages: a stage of choosing the best variables describing an experimental object and a stage of proper experimental investigation, seems particularly interesting. An interesting example of an application of statistical strategies in environmental protection is the optimization of photoactivity of TiO2/SiO2 mixture, received by a sol-gel technique. TiO2, due to its specific feature, was applied in the photocatalytic methods of removing toxic compounds from water and air. In the experiments there were used two designs - the fractional factorial design 2^5-1 (as the elimination one) and the central composite design (as the proper one). Following the data analysis from the elimination plan two variables were eliminated, which helped to simplify the research object. Among other uncommon applications of the design of experiments: the optimization of the conditions for the extraction of natural pigments used in dyeing food, the production of fatty acid methyl esters used as diesel oil substitutes (biodiesel) and the optimization of a supercritical fluid extraction methodology for the analysis of castor oil, should be mentioned.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 4; 63-67
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
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:
Drying kinetics of a solar dryer for drying of potato chips in Western Maharashtra, India
Autorzy:
Yadav, Aditya Arvind
Bagi, Jaydeep S.
Prabhu, Pravin A.
Powiązania:
https://bibliotekanauki.pl/articles/2106434.pdf
Data publikacji:
2022
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
solar greenhouse dryer
drying
potato chips
solar thermal energy
response surface methodology
design of experiments
szklarnia
suszarnia słoneczna
suszenie
chipsy ziemniaczane
energia słoneczna
metodologia powierzchni odpowiedzi
projektowanie eksperymentów
Opis:
The current study focuses on the performance of a solar greenhouse dryer for drying of potato chips in Solar Dryer and Open sun conditions in Western Maharashtra. Potato chips is a value added product that can be effectively used during throughout the year as snacks, a side dish or an appetizer. It can be either deep dried or backed for consumption. The dried potato contains a high fiber content and it helps to lower the cholesterol level in blood reducing the risk of blood pressure if consumed backed. Potato chips can effectively be stored for one year to six months and consumed as snacks. The experiment was conducted for drying of potato chips in Solar Greenhouse Dryer and open sun conditions on 1st of April 2021 for 6 hours. The initial weight of the potato chips to be dried was 500 grams both for the solar greenhouse dryer and open sun drying conditions. The experiment was conducted at Bahe, Borgaon, Tal-Walwa, Dist-Sangli, Maharashtra, India located at 17.115°N and 74.33°E. The experimental observations collected during the tests were set as input data for the Design of the Experiments (DoE) i.e., for Response Surface Modelling (RSM). The main aim of using DoE i.e., Response Surface Modelling, is to obtain an optimum region for drying of potato chips in the Solar Greenhouse Dryer, from the surface plot; the region of maxima and minima was obtained. The contour plot obtained during modeling resembles the optimum region of drying; the optimum region for drying of potato chips is 47 to 50°C respectively. The Moisture Removal Rate (MRR) for drying of potato chips in the Solar Greenhouse Dryer and Open sun drying is 83% and 78% respectively. The drying rate observed during the experiment has a better resemblance with simulated Response Surface Modelling.
Źródło:
Journal of Mechanical and Energy Engineering; 2022, 6, 1; 91--98
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response surface modelling and performance evaluation of solar dryer for drying of grapes
Autorzy:
Yadav, Aditya Arvind
Prabhu, Pravin A.
Bagi, Jaydeep S.
Powiązania:
https://bibliotekanauki.pl/articles/2052236.pdf
Data publikacji:
2021
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
solar greenhouse dryer
drying
moisture removal
solar thermal energy
response surface methodology
design of experiments
szklarnia
suszarnia słoneczna
suszenie
usuwanie wilgoci
energia słoneczna
metodologia powierzchni odpowiedzi
projektowanie eksperymentów
Opis:
The current study focuses on the performance of Solar Greenhouse Dryer for drying of grapes for raisin making in Solar Dryer and Open sun condition in Western Maharashtra. The Maharashtra state ranks first in the production of grapes, probably Western Maharashtra produces nearly 800 thousand tons of grapes every year. The major wastage of grapes is due to low sugar content, glossy appearance, shrinkage, excess water in berry, scorching and size variation. Therefore, there is a need to preserve the grapes by drying and making raisins for a non-seasonal requirement. The experiment was conducted for drying of grapes in Solar Greenhouse Dryer and Open Sun condition from 1st of April to 4th of April for 48 hours. The initial weight of the grapes to be dried was 500 grams for both Solar Greenhouse Dryer and open sun drying conditions. The experiment was conducted at Bahe, Borgaon, Tal-Walwa, Dist- Sangli, Maharashtra, India located at 17.115o N and 74.33o E. The main aim of using DOE i.e., Response Surface Modelling is to get an optimum region for drying of grapes in Solar Greenhouse Dryer, from the Surface plot; the region of maxima and minima was obtained.
Źródło:
Journal of Mechanical and Energy Engineering; 2021, 5, 2; 157-168
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the epoxidation process of (1Z,5E,9E)-1,5,9-cyclododecatriene to 1,2-epoxy-(5Z,9E)-5,9-cyclododecadiene with tert-buthyl hydroperoxide — the influence of technological parameters on the hydroperoxide conversion
Autorzy:
Lewandowski, G.
Rytwińska, E.
Milchert, E.
Powiązania:
https://bibliotekanauki.pl/articles/778202.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
epoksydowanie
wodoronadtlenek tert-butylu
(1Z,5E,9E)-1,5,9-cyklododekatrien
1,2-epoksy-(Z,E)-5,9-cyklododekadien
planowanie doświadczeń
optymalizacja
epoxidation
tert-butyl hydroperoxide
(1Z,5E,9E)-1,5,9-cyclododecatriene
1,2-epoxy-(5Z,9E)-5,9-cyclododecadiene
design of experiments
optimization
Opis:
The optimization studies of the epoxidation process of (1Z,5E,9E)-1,5,9-cyclododecatriene (CDT) with tert-buthyl hydroperoxide (TBHP) over the molybdenum catalyst Mo(CO)6 were performed. The reaction was examined in terms of a uniform-rotatable design. Three factors were analyzed: the reaction time, CDT:TBHP molar ratio, and the molar concentration of the catalyst (Mo(CO)6). According to the design 20 experiments were performed at the constant temperature of 70°C.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 3; 105-107
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
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