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    Wyświetlanie 1-24 z 24
    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:
    The Investigation of Conductive Via Properties
    Autorzy:
    Jurków, D.
    Dorczyński, M.
    Golonka, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/220519.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    LTCC
    DOE
    experiment
    via
    electrical
    Opis:
    The investigation ofthe Low Temperature Co-fired Ceramic (L TCC) via filling process quality is presented in this paper. The goal of this paper was to propose and to validate a way of the verification whether the L TCC fabrication was conducted correctly. The work presents an application of the Design of the Experiment (DoE) methodology in such validation and discusses usefulness and drawbacks of the chosen solution. The optimized technology of via filling will be applied in the fabrication of tactile displays for blind people.
    Źródło:
    Metrology and Measurement Systems; 2015, 22, 1; 39-50
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation in factory optimisation
    Autorzy:
    Gregor, M.
    Matuszek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/118279.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    FMS
    DOE
    modelling and simulation
    optimisation
    Opis:
    Many manufacturing systems must operate under resource constraints. Simulation can help to improve the operation of such manufacturing systems. This paper presents a practical approach how to conduct a simulation project. A Flexible Manufacturing System (FMS) was chosen for the simulation. The targets for FMS improvement were given. A set of measures was proposed to meet the given targets. Design of Experiments (DoE) was used to minimise the number of simulation experiments. There were simulated and evaluated various measures and control strategies and their influence on the FMS characteristics. Rough cost analysis of each simulated variant was done. Future research targets are presented.
    Źródło:
    Applied Computer Science; 2005, 1, 1; 61-74
    1895-3735
    Pojawia się w:
    Applied Computer Science
    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:
    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:
    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 a Fuzzy Inference System for the Optimization of Material Removal Rate and Multiple Surface Roughness Characteristics in the Machining of GFRP Polyester Composites
    Autorzy:
    Singh, A.
    Datta, S.
    Mahapatra, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/375921.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    GFRP
    DOE
    Fuzzy Inference System (FIS)
    Taguchi method
    Opis:
    This paper presents a multi-objective extended optimization methodology applied in the machining of a randomly oriented GFRP rod. Design of Experiment (DOE) has been selected based on a L9 orthogonal array design with varying process control parameters like: spindle speed, feed rate and depth of cut. Multiple surface roughness parameters of the machined FRP product along with the Material Removal Rate (MRR) of the machining process have been optimized simultaneously. The Fuzzy Inference System (FIS) has been proposed for providing feasible means for the meaningful aggregation of multiple objective unctions into an equivalent single performance index (MPCI). This Multi-Performance Characteristic Index (MPCI) has been optimized using the Taguchi method. The approach adapted here is capable of overcoming limitations/assumptions of existing optimization methodologies available in the literature.
    Źródło:
    Decision Making in Manufacturing and Services; 2013, 7, 1-2; 19-42
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Particle Size and Load on Loss of Material in Manganese-Steel Material: an Experimental Investigation
    Autorzy:
    Sinha, R.
    Mukhopadhyay, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/354746.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mn-steel
    abrasive wear
    stacking fault energy
    FESEM
    DOE
    Opis:
    The present study explores the influence of variables like particle size of coal, load, speed and sliding distance on weight loss in manganese-steel (Mn-steel). The observations are made using pin-on-disc apparatus. Specimen prepared from Mn-steel used for the wear test. The size and shape of specimen is in accordance with ASTM G99 standard. From design of experiment (DOE) procedure the variables load were altered to assess the weight loss in material. It is observed that with the increase in particle size and load, the weight loss increases when other variables are constant. Mn-steel shows decrease in weight loss at higher load due to property of dipole interaction and stacking fault energy (SFE). Decrease in weight loss at higher load results in transition in wear mechanism from scratch to groove formation as observed under field emission scanning electron microscope (FESEM).
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 359-364
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Digital Synthesis of Sound Generated by Tibetan Bowls and Bells
    Autorzy:
    Gołaś, A.
    Filipek, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/177659.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sound synthesis
    coupled fields
    FEM
    DOE
    response surface methodology
    Opis:
    The aim of this paper is to present methods of digitally synthesising the sound generated by vibroacoustic systems with distributed parameters. A general algorithm was developed to synthesise the sounds of selected musical instruments with an axisymmetrical shape and impact excitation, i.e., Tibetan bowls and bells. A coupled mechanical-acoustic field described by partial differential equations was discretized by using the Finite Element Method (FEM) implemented in the ANSYS package. The presented synthesis method is original due to the fact that the determination of the system response in the time domain to the pulse (impact) excitation is based on the numerical calculation of the convolution of the forcing function and impulse response of the system. This was calculated as an inverse Fourier transform of the system’s spectral transfer function. The synthesiser allows for obtaining a sound signal with the assumed, expected parameters by tuning the resonance frequencies which exist in the spectrum of the generated sound. This is accomplished, basing on the Design of Experiment (DOE) theory, by creating a meta-model which contains information on its response surfaces regarding the influence of the design parameters. The synthesis resulted in a sound pressure signal in selected points in space surrounding the instrument which is consistent with the signal generated by the actual instruments, and the results obtained can improve them.
    Źródło:
    Archives of Acoustics; 2016, 41, 1; 139-150
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    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:
    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:
    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
    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:
    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:
    Optymalizacja procesu otrzymywania nanosfer proleku polilaktydu z chlorofenezyną
    Optimization of preparation of prodrug nanospheres of polylactide with ehlorphenesin
    Autorzy:
    Sebai, A.
    Gadomska-Gajadhur, A.
    Ruśkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2073198.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    polilaktyd
    chlorofenezyna
    nanosfery
    kontrolowane uwalnianie leków
    polylactide
    chlorphenesin
    DOE
    nanospheres
    drug delivery system (DDS)
    Opis:
    Przedstawiono wyniki badań doświadczalnych procesu otrzymywania nanosfer polilaktydowych zawierających chlorofenezynę, otrzymywanych metodą emulsyjną z odparowaniem rozpuszczalnika. Cząstki te mogłyby być wykorzystywane jako przeciwgrzybicze systemy leków o kontrolowanym czasie uwalniania. Stosując metodę planowania doświadczeń uzyskano równanie regresji opisujące wpływ wybranych parametrów procesu na rozmiar sfer. Określono warunki otrzymywania cząstek o rozmiarze poniżej 100 nm.
    Research results dealing with the preparation of polylactide nanospheres containing ehlorphenesin are presented. Polylactide nanospheres were prepared by the emulsification method with solvent evaporation. These particles could be used commercially as the antifungal drug delivery system. An influence of selected process parameters on the spheres’ size was determined. The regression equation was predicted using the mathematical method of experiment design (DOE). The particles of size smaller than 100 nm were obtained.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2016, 5; 201--202
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    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:
    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:
    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:
    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:
    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 quality shaping methods in the work environment improvement. A case of theoretical frames
    Zalecenia dotyczące systemu monitoringu podziemnych magazynów gazu
    Autorzy:
    Górny, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/409710.pdf
    Data publikacji:
    2014
    Wydawca:
    STE GROUP
    Tematy:
    work environment improvement
    shaping methods
    FMEA
    QFD
    DOE
    podziemne magazynowanie gazu (PMG)
    monitorowanie i kontrola
    monitorowanie struktury
    podejście jakościowo-wskaźnikowe
    Opis:
    Businesses, which typically operate in highly changeable settings, are forced to make constant adjustments to meet legislative requirements concerning employment and the performance of work. To that end, they need to identify tools for improving their work processes. By employing quality management methods to upgrade their working environments, enterprises gain the ability to satisfy the needs and expectations of their customers, including the internal customers who rely on the processes carried out by their employees. The effort not only helps them boost the quality, reliability, flexibility and cost-efficiency of their processes but also allows them to comply with legislative/regulatory requirements. In doing so, they bring their system into conformity with any safety policies that are in place in their organizations. The article discusses the option of employing quality-oriented process design methods (FMEA, QFD and DOE) to improve working environments. The author describes some of the basic prerequisites for their use aimed at boosting the planning and deployment of improvement measures in areas related to the working environment.
    W artykule, zgodnie z „podejściem procesowym” ISO 9000, wykazana została konieczność stworzenia systemu monitoringu i kontroli podziemnego magazynowania gazu, w tym: obiektów, parametrów, metod, częstotliwości działań naprawczych, który wykonany zostanie na podstawie wzoru strukturalnego cyklu monitoringu. Podejście jakościowo-wskaźnikowe pozwala na definiowanie złożonych kryteriów oszacowania efektywności działania, które będą pomocne w podejmowaniu skutecznych decyzji w zakresie zarządzania w odpowiednim czasie, w tym również z punktu widzenia ochrony środowiska.
    Źródło:
    Management Systems in Production Engineering; 2014, 3 (15); 106-111
    2299-0461
    Pojawia się w:
    Management Systems in Production 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:
    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
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