Temat: Plackett-Burman - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of Cladding Parameters with FCAW on Bead Geometry with Plackett-Burman Experiment Used
Autorzy:: Bęczkowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/355980.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: cladding
hardface plate
geometry
Plackett-Burman design
FCAW
Opis:: The paper analyzes, from the geometrical aspect, the quality of the new flux cored wire intended for cladding process in function of changes in cladding parameters such as welding speed, coefficient of thermal conductivity, power source setting, the length of projecting portion of the electrode. The results of bead geometry analysis allows to illustrate the nature of the impact of the examined input variables on parameters of generated surface. The most important parameters here are the depth of penetration and the height of clad. The experimental data were processed using the Plackett-Burman experiment, which describes the impact of technological parameters on the main parameters used during production of resisting panels. It shows mathematical relations describing correlations between the input parameters and the value of depth of penetration and hight of bead made by Flux Cored Arc Welding (FCAW).
Źródło:: Archives of Metallurgy and Materials; 2018, 63, 2; 681-687
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Optimization of the culture medium using the Burman and Box-Behnken experimental designs for an enhanced production of alginate by Azotobacter vinelandii
Autorzy:: El-Shanshoury, Abd El-Raheem R.
Kenawy, El-Refaie
Amara, Amro A.
Mohamed, Samia F.
Salama, Afrah F.
Kishk, Shimaa
Powiązania:: https://bibliotekanauki.pl/articles/16722330.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: alginate
Azotobacter vinelandii
optimization
culture medium
Box-Behnken
Plackett-Burman
Opis:: Alginates are regarded as high-value biomacromolecules. A pursuit for new bacterial species that can produce novel alginates for various applications in different industries including the pharmaceutical and food industries as well as the field of medicine is still needed. Variations in the molecular weight and sugar composition of alginates depend on the culture medium composition and different physical conditions provided during fermentation. The aim of this study was to obtain a maximum alginate production by the potent Egyptian bacterial strain Azotobacter vinelandii , out of the 30 tested Azotobacter isolates. The composition of the production medium and environmental growth conditions during fermentation were optimized to ensure consistency and to enhance alginate production. Nine variables were optimized using the Plackett-Burman randomization method. Eighteen trials were performed to verify the variables to obtain high alginate production levels. Temperature as well as sucrose and NaCl concentrations have been found to affect the alginate production by A. vinelandii significantly and were therefore chosen for further improvement of the medium using the Box-Behnken design. The Box Behnken model was optimized mathematically using the Excel solver. The results were analyzed statistically by ANOVA multiple regression analysis and different statistical methods (coefficient, standard error, t statistic, and confidence interval). On using the Plackett-Burman and Box-Behnken designs, the biggest alginate production rates were found to be 3.8 and 4.94 g/l/day, respectively. Addition of 00.1 g/l MgSO4, 0.01 g/l FSO4, and 0.001 g/l NaMoO4 to the culture medium further enhanced the alginate production and yielded 5.4 g/l/day and 8.5 g/l/day. Thus, the obtained alginate was purified using Sephadex G-100 Gel chromatography and compared with a standard by IR correlation. The alginate was found to be composed of 50–70% carbohydrates and 60–80% uronic acid. The techniques used in this survey were found useful for improving the production of alginates.
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2018, 99, 3; 185-196
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Application of the Plackett-Burman Design on Soil Fertility Determinants
Autorzy:: Mehdaoui, Imane
El Ouadrhiri, Faiçal
Saoudi Hassani, El Mokhtar
Ben Abbou, Mohamed
Elhaji, Mounia
Akhazane, Mohamed
Taleb, Mustapha
Rais, Zakia
Powiązania:: https://bibliotekanauki.pl/articles/2202310.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: screening
factor
variable
Plackett-Burman design
coefficient of determination
Pareto chart
Opis:: In the present review article, a soil from the region of Fez-Sefrou Morocco was screened for some physicochemical characteristics using the Plackett-Burman model in order to determine the most important factors that promote its fertility. Five independent variables were selected: pH, electrical conductivity, humidity, organic matter, and C/N ratio. These variables were evaluated by statistical analysis, based on their significance, the value of the coefficient of determination and the Pareto chart. The results suggest that humidity and C/N ratio have an influence with a high level of confidence, while the other three show no significant effect on the content of nutrients in the soil. The analysis of the R2 variance value also showed that the models used for prediction were large and significant factors (p less than 0.05). Pareto chart plots for each response and its characteristics provided accurate data to select well-fitting variables for further optimization.
Źródło:: Journal of Ecological Engineering; 2022, 23, 12; 254--263
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The use of Plackett-Burman plans and the analysis of expert opinions, in order to assess the significance of controllable parameters of the plasma cutting process
Wykorzystanie planów Plackett a-Burmana i analizy opinii ekspertów w celu oceny istotności parametrów sterowalnych procesu cięcia plazmowego
Autorzy:: Feldshtein, E.
Patalas-Maliszewska, J.
Kłos, S.
Kałasznikow, A.
Andrzejewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/1365334.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: plasma cutting
cutting parameters
the Plackett-Burman method
method for the analysis of expert opinions
cięcie plazmowe
parametry cięcia
metoda Placketta-Burmana
metoda analizy opinii ekspertów
Opis:: This article evaluates the significance of controllable parameters in the plasma cutting process, using the Plackett-Burman Method and the Analysis of Expert Opinions Method. The plasma cutting process was tested using a WPA-6000 Compakt plasma cutter, on non-alloy steel, of the S235JR EN 10025-2:2007 grade, with a carbon equivalent of 0.35%. The effect of the thickness of the sheet, the current flow rate, the cutting speed, the gas pressure during cutting, the height of the torch during cutting, the pierce delay time and the initial pierce height, were analysed. The research revealed the influence of the controllable parameters tested, in the plasma cutting process, on selected output parameters, surface cut drag lines, the width of the kerf at the inlet and outlet, and the value of the perpendicularity of the kerf on the surface of the base. The greatest influences were recorded for intensity of cutting current, cutting speed and gas pressure during cutting. The results obtained were confirmed by the results of the analysis of expert opinions.
W artykule dokonano oceny istotności parametrów sterowalnych procesu cięcia plazmowego za pomocą metody Placketta-Burmana i analizy opinii ekspertów. Badania procesu cięcia plazmowego przeprowadzono przy użyciu przecinarki plazmowej WPA- 6000 Compakt na stali niestopowej konstrukcyjnej gatunku S235JR EN 10025-2:2007 z ekwiwalentem węglowym wynoszącym 0.35 %. Analizowano wpływ grubości blachy, natężenia prądu, prędkości cięcia, ciśnienia gazów podczas cięcia, odstępu palnika od blachy podczas cięcia, czasu dziurkowania oraz wysokości startu. Badania ujawniły wpływ badanych parametrów sterowalnych procesu cięcia plazmowego na wybrane parametry wyjściowe, w szczególności na skok śladów cięcia, na szerokość szczeliny na wejściu i wyjściu oraz na wartość prostopadłości szczeliny do powierzchni bazowej. Największe wpływy zarejestrowano dla natężenia prądu, prędkości cięcia oraz ciśnienia gazu podczas cięcia. Otrzymane wyniki badań zostały potwierdzone wynikami analizy opinii ekspertów.
Źródło:: Eksploatacja i Niezawodność; 2018, 20, 3; 443-449
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
Dostawca treści:: Biblioteka Nauki

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