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Wyszukujesz frazę "desirability function" wg kryterium: Temat


Wyświetlanie 1-7 z 7
Tytuł:
Bioclimatic zoning of the territory of Ukraine based on human thermal state assessment
Autorzy:
Malytska, Liudmyla
Moskalenko, Stanislav
Powiązania:
https://bibliotekanauki.pl/articles/1445119.pdf
Data publikacji:
2020
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
bioclimatic conditions
Harrington desirability function
biometeorological indices
human thermal state
Opis:
This research focuses on objective assessment of bioclimatic conditions through analyses of biometeorological indices based on Harrington’s desirability function. Evaluation criteria for the Harrington desirability function during winter are: Bodman’s winter severity index (S), equivalent-efficient temperatures (EETA), index of wind cooling (K0), and wind chill temperature (WC). These metrics were integrated into one complex, generalized desirability index for winter (DW). For the summer period, equivalentefficient temperatures of Missenard (EЕT) index, radiation equivalent-effective temperature (PEET) and Heat Index (HI), were combined to form a desirability index for summer (DS). Zoning of the territory by e integrating the indices (DW/DS) portrays the seasonal and spatial differentiation of bioclimatic conditions over Ukraine. These differences were used to highlight the most favorable and unfavorable regions (zones) for humans and, accordingly, the level of bioclimatic resources for each region. In winter across Ukraine, four zones with different levels of weather comfort were identified, with only three zones in summer. For both seasons meteorological conditions are mostly comfortable based on human thermal state. Zone 3, with satisfactory bioclimatic resources and comfortable weather, is the largest of all zones in both winter and summer, making up 49.61% and 61.0% Ukraine’s territory, respectively. Average values of climatic characteristics were calculated for the specified zones for both seasons (1981-2010).
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2020, 8, 2; 20-26
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced methodology of assessment of technical state of overhead type cranes
Modernizirovannaja metodika ocenki tekhnicheskogo sostojanija kranov mostovogo tipa
Autorzy:
Boyko, G.
Powiązania:
https://bibliotekanauki.pl/articles/793076.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
methodology
desirability function
climbing crane
technical state
metal structure
safety factor
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
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:
Modeling and parametric optimization of friction stir welding of aluminium alloy AA7068-T6 using response surface methodology and desirability function analysis
Autorzy:
Bindu, M. D.
Tide, P. S.
Bhasi, A. B.
Ramachandran, K. K.
Powiązania:
https://bibliotekanauki.pl/articles/2086852.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AA7068-T6
friction stir welding
response surface method
desirability function
zgrzewanie tarciowe z mieszaniem
metoda powierzchni odpowiedzi
funkcja spełnienia wymagań
Opis:
In this investigation, high specific strength precipitation hardenable alloy AA7068-T6 was joined using friction stir welding. Experiments were carried out using the three factor-three level central composite face-centered design of response surface methodology. Regression models were developed to assess the influence of tool rotational speed, welding speed, and axial force on ultimate tensile strength and elongation of the fabricated joints. The validity of the developed models was tested using the analysis of variance (ANOVA), actual and adjusted values of the regression coefficients, and experimental trials. The analysis of the developed models together with microstructural studies of typical cases showed that the tool rotational speed and welding speed have a significant interaction effect on the tensile strength and elongation of the joints. However, the axial force has a relatively low interaction effect with tool rotational speed and welding speed on the strength and elongation of the joints. The process variables were optimized using the desirability function analysis. The optimized values of joint tensile strength and elongation – 516 MPa and 21.57%, respectively were obtained at a tool rotational speed of 1218 rpm, welding speed of 47 mm/ min, and an axial force of 5.3 kN.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 4; e137936, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dry Sliding Wear Behavior of Super Duplex Stainless Steel AISI 2507: A Statistical Approach
Autorzy:
Davanageri, M.
Narendranath, S.
Kadoli, R.
Powiązania:
https://bibliotekanauki.pl/articles/379496.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
duplex stainless steel
specific wear rate
Taguchi method
response surface methodology
desirability function approach
stal nierdzewna duplex
stopień zużycia
metoda Taguchi
metoda powierzchni odpowiedzi
Opis:
The dry sliding wear behavior of heat-treated super duplex stainless steel AISI 2507 was examined by taking pin-on-disc type of wear-test rig. Independent parameters, namely applied load, sliding distance, and sliding speed, influence mainly the wear rate of super duplex stainless steel. The said material was heat treated to a temperature of 850°C for 1 hour followed by water quenching. The heat treatment was carried out to precipitate the secondary sigma phase formation. Experiments were conducted to study the influence of independent parameters set at three factor levels using the L27 orthogonal array of the Taguchi experimental design on the wear rate. Statistical significance of both individual and combined factor effects was determined for specific wear rate. Surface plots were drawn to explain the behavior of independent variables on the measured wear rate. Statistically, the models were validated using the analysis of variance test. Multiple non-linear regression equations were derived for wear rate expressed as non-linear functions of independent variables. Further, the prediction accuracy of the developed regression equation was tested with the actual experiments. The independent parameters responsible for the desired minimum wear rate were determined by using the desirability function approach. The worn-out surface characteristics obtained for the minimum wear rate was examined using the scanning electron microscope. The desired smooth surface was obtained for the determined optimal condition by desirability function approach.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 47-56
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical foundations of complex desirability function for evaluation of the product quality in the relationship with anthropogenic impacts on the environment
Matematyczne podstawy zespolonych funkcji celów stosowanych do ewaluacji jakości produktu w związku z antropogenicznym wpływem środowiska
Autorzy:
Brakovich, A.
Kolesnikov, V.
Urbanovich, P.
Powiązania:
https://bibliotekanauki.pl/articles/408151.pdf
Data publikacji:
2012
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
złożona funkcja celu
model matematyczny
ekologia
complex function of desirability
mathematical model ecology
Opis:
The article is devoted to the development of integrated assessment of the industrial enterprise, in collaboration with the impact on the environment. A new method of multicriteria evaluation of the enterprise activities is given. Provides the mathematical foundations of complex function of desirability. The example of calculation for the industrial enterprise, which produces printing paper is given.
Artykuł przedstawia unowocześnienie zintegrowanej oceny przemysłu, względem oddziaływania na środowisko. Została opisana nowa metoda wielokryterialnej oceny działalności przedsiębiorstw w oparciu o aparat matematyczny. Dodatkowo został podany przykład obliczeń dla przedsiębiorstwa produkującego papier.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2012, 4a; 36-38
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiplication of Air Accidents Frequency and Hazard Desirability Coefficients for ICAO Safety Risk Tolerability Matrix Solution
Autorzy:
Borsuk, Sergey Pavlovich
Reva, Oleksiy
Kharchenko, Volodymyr
Powiązania:
https://bibliotekanauki.pl/articles/504648.pdf
Data publikacji:
2015
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
flight safety
tolerability matrix
frequency and hazard event desirability coefficients
Harrington function
risk level determination criteria
Opis:
Using mathematical method of priorities arrangement, also known as problem “about leader”, air accidents frequency and hazard desirability coefficients were found. Those coefficients are proposed by ICAO for safety risk tolerability matrix solution. Integral index of mentioned parameters combinations hazard is found with help of Harrington desirability function. Risk levels determination index is introduced for researched matrix.
Źródło:
Logistics and Transport; 2015, 25, 1; 63-70
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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