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Wyszukujesz frazę "simulation study" wg kryterium: Temat

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Wyświetlanie 1-10 z 28
Tytuł:
Integrated production system on social manufacturing: a simulation study
Autorzy:
Sari, Marti Widya
Herianto
Dharma-IGB, Budi
Tontowi, Alva Edy
Powiązania:
https://bibliotekanauki.pl/articles/27315509.pdf
Data publikacji:
2022
Wydawca:
STE GROUP
Tematy:
social manufacturing
integrated production systems
simulation study
ProModel
Opis:
Today, the manufacturing industry must adapt to dynamic customer needs, changing from time to time following market trends. So that the production process in manufacturing requires adjustments, one of which is by forming social manufacturing. This study aims to create an integrated production system model based on social manufacturing, which involves several Socialized Manufacturing Resources (SMR) as manufacturing resources that are socialized to produce a product. The methods used are field observation, literature study, design of a social manufacturing-based production system model, model simulation using ProModel software, and analysis of model simulation results. In this study, the simulation involves four SMRs, each of which makes a part that has been given specifications by the manufacturer based on customer requests. The product produced is the Sanitation Chamber, which is equipped with a control system to monitor reading data via the internet. The model simulation uses the Pro Model software and analyzes resource use, location utilization, and resource costs.
Źródło:
Management Systems in Production Engineering; 2022, 3 (30); 230--237
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The errors-in-variable model in the optimal portfolio construction
Autorzy:
Czapkiewicz, A.
Machowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/375915.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
maximum likelihood method
errors-in-variables model
portfolio
simulation study
Opis:
In the paper we consider a modification of Sharpe's method used in classical portfolio analysis for optimal portfolio building. The conventional theory assumes there is a linear relationship between asset's return and market portfolio return, while the influence of all the other factors is not included. We propose not to neglect them any more, but include them into a model. Since the factors in question are often hard to measure or even characterize, we treat them as a disturbances on random variables used by classical Sharpe's method. The key idea of the paper is the modification of the classical approach by application of the errors-in-variable model. We assume that both independent (market portfolio return) as well as dependent (given asset's return) variables are randomly distributed values related with each other by linear relationship and we build the model used for parameters' estimation. To verify the model, we performed an analysis based on archival data from Warsaw Stock Exchange. The results are also included.
Źródło:
Decision Making in Manufacturing and Services; 2007, 1, 1-2; 49-57
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania symulacyjne w ocenie jakości i trwałości nawierzchni kolejowej i jej stalowych elementów
Simulation study in assessment the quality and durability of the superstructure and its steel components
Autorzy:
Kukulski, J.
Powiązania:
https://bibliotekanauki.pl/articles/383609.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
infrastruktura kolejowa
badania symulacyjne
MES
railway infrastructure
simulation study
FEM
Opis:
W pracy przedstawiono narzędzia symulacyjne, które mogą być wykorzystywane w ocenie jakości i trwałości wybranych elementów nawierzchni kolejowej. W artykule zaprezentowano wybrane wyniki badań symulacyjnych naprężeń własnych w procesie produkcji elementów stalowych rozjazdów kolejowych, jak też uproszczonego modelu nawierzchni kolejowej. Badania obejmowały różne warianty konstrukcji jak i jej obciążenia eksploatacyjne. Prezentowane wyniki badań symulacyjnych stanowiły m.in. uzupełnienie badań doświadczalnych.
The paper presents simulation instruments that can be used to evaluate the quality and durability of selected the superstructure and its components. The article presents selected results of simulation residual stress simulation tests in the steel production process of railway turnouts as well as a simplified model of railway superstructure. The various construction variants and their operating loads have been analysed. Presented results of the simulation studies were among others completion of experimental research.
Źródło:
Archiwum Instytutu Inżynierii Lądowej; 2017, 25; 245-254
1897-4007
Pojawia się w:
Archiwum Instytutu Inżynierii Lądowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ratio estimation of two population means in two-phase stratified random sampling under a scrambled response situation
Autorzy:
Das, Pitambar
Singh, Garib Nath
Bandyopadhyay, Arnab
Powiązania:
https://bibliotekanauki.pl/articles/31342165.pdf
Data publikacji:
2023-12-07
Wydawca:
Główny Urząd Statystyczny
Tematy:
stratified random sampling
scrambled response
auxiliary variable
mean square error
simulation study
Opis:
In this paper, we have described the development of an effective two-phase stratified random sampling estimation procedure in a scrambled response situation. Two different exponential, regression-type estimators were formed separately for different structures of two-phase stratified sampling schemes. We have studied the properties of the suggested strategy. The performance of the proposed strategy has been demonstrated through numerical evidence based on a data set of a natural population and a population generated through simulation studies. Taking into consideration the encouraging findings, suitable recommendations for survey statisticians are prepared for the application of the proposed strategy in real-life conditions.
Źródło:
Statistics in Transition new series; 2023, 24, 5; 45-61
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On estimation of parameters in the bivariate linear errors-in-variables model
Autorzy:
Czapkiewicz, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1338894.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
regression line
variance component
simulation study
maximum likelihood method
estimator
replication model
Opis:
We discuss some methods of estimation in bivariate errors-in-variables linear models. We also suggest a method of constructing consistent estimators in the case when the error disturbances have the normal distribution with unknown parameters. It is based on the theory of estimating variance components in linear models. A simulation study is presented which compares this estimator with the maximum likelihood one.
Źródło:
Applicationes Mathematicae; 1998-1999, 25, 4; 401-410
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Cost Efficiency of Sampling Designs
Autorzy:
Liberts, Mārtiņš
Powiązania:
https://bibliotekanauki.pl/articles/466071.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Statystyczny
Tematy:
cost efficiency
simulation study
survey cost estimation
survey methodology
variance of estimators
Opis:
The aim of a sample survey is to obtain high quality estimates of population parameters with low cost. The expected precision of estimates and the expected data collection cost are usually unknown making the choice of sampling design a complicated task. Analytical methods can not be used often because of the complexity of the sampling design or data collection process. The aim of this paper is to develop a mathematical framework to compare chosen sampling designs with respect to the expected precision of estimates and the data collection cost. As a result a framework is developed which employs artificial population data generation, survey sampling techniques, survey cost modelling, Monte Carlo simulation experiments and other techniques. The framework is applied to analyse the cost efficiency of the sampling design currently used for the Latvian Labour Force Survey.
Źródło:
Statistics in Transition new series; 2013, 14, 1; 7-30
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odd log-logistic generalised Lindley distribution with properties and applications
Autorzy:
Ranjbar, Vahid
Eftekharian, Abbas
Kharazmi, Omid
Alizadeh, Morad
Powiązania:
https://bibliotekanauki.pl/articles/18707217.pdf
Data publikacji:
2023-09-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
Lindley distribution
odd log-logistic generalised family
moments
Bayesian analysis
simulation study
Opis:
In this paper, a new three-parameter lifetime model, called the odd log-logistic generalised Lindley distribution, is introduced. Some structural properties of the new distribution including ordinary and incomplete moments, quantile and generating functions and order statistics are obtained. The new density function can be expressed as a linear mixture of exponentiated Lindley densities. Different methods are discussed to estimate the model parameters and a simulation study is carried out to show the performance of the new distribution. The importance and flexibility of the new model are also illustrated empirically by means of two real data sets. Finally, Bayesian analysis and Gibbs sampling are performed based on the two real data sets.
Źródło:
Statistics in Transition new series; 2023, 24, 4; 71-92
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the frictional resistance in the model forming process by the finite element method
Określenie oporów tarcia metodą elementów skończonych w modelowym procesie wytłaczania
Autorzy:
Lenik, K.
Korga, S.
Kalinowska-Ozgowicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/189328.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
FEM
friction
plastic deformation
extrusion
simulation study
MES
tarcie
odkształcenie plastyczne
wytłaczanie
badania symulacyjne
Opis:
This article presents the results of measurements on friction forces carried out in the model forming process (MFP). The description of this process takes into consideration the presence of plastic strain at the interface between the test specimen and tool due to the material flow. The experimental forming process was performer with a laboratory unit constructed and manufactured at the Fundamentals of Technology Faculty of the Lublin University of Technology [L. 1, 2]. This unit was used to carry out the measurements on friction force Turing model forming of shaped test specimens at a pressure of 0 to 100kN acting on a continuous basis during the research process. The results of experimental measurements of friction forces were compared to those of numerical calculations obtained with the finite element method (FEM). Experimental results of friction for ces were compared with the results obtained using the model forming process (MFP). In order to document the effects of plastic strain in the structure of shaped test specimens subjected to experimental model forming, metallographic examinations were carried out using a light microscope. Structure observations were conducted in a bright field and polarised light with a magnification of up to 2000x.
W artykule przedstawiono rezultaty badań sił tarcia w modelowym procesie wytłaczania (MPW). Uwzględniono także występowanie odkształcenia plastycznego zachodzącego wskutek płynięcia materiału przy styku próbki z narzędziem. Modelowy proces wytłaczania przeprowadzono na urządzeniu laboratoryjnym skonstruowanym i wykonanym na Wydziale Podstaw Techniki Politechniki Lubelskiej. Urządzenie pozwalało na prowadzenie badań wytłaczania próbek kształtowych dla siły nacisku (od 0 do 100 N) działającej w sposób ciągły, w trakcie procesu badawczego. Efekty doświadczalne pomiarów sił tarcia porównano z wynikami uzyskanymi metodą obliczeniową przy zastosowaniu MES w modelowym procesie wytłaczania (MPW). Użycie metod numerycznych pozwoliło również na obliczenie rozkładu odkształceń w badanych próbkach. Dla udokumentowania efektów odkształcenia plastycznego w strukturze kształtowników poddanych doświadczalnemu, modelowemu wytłaczaniu przeprowadzono badania metalograficzne przy wykorzystaniu mikroskopu świetlnego. Obserwacje struktury prowadzono w polu jasnym i świetle spolaryzowanym przy powiększeniu do 2000x.
Źródło:
Tribologia; 2017, 275, 5; 29-36
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of dynamic characteristics of selected pneumatic systems with rractional calculus. simulation and laboratory research
Autorzy:
Luft, M.
Krzysztoszek, K.
Pietruszczak, D.
Nowocień, A.
Powiązania:
https://bibliotekanauki.pl/articles/2063992.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
pneumatic Systems
vessel's dynamic characteristics
dynamic characteristics
fractional calculus
Riemann-Liouville Definition
laboratory research
simulation study
Matlab
Opis:
The section of the paper on simulation studies presents the application of fractional calculus to describe the dynamics of pneumatic systems. In the construction of mathematical models of the analysed dynamic systems, the Riemann-Liouville definition of differ-integral of non-integer order was used. For the analysed model, transfer function of integer and non-integer order was determined. Functions describing characteristics in time and frequency domains were determined, whereas the characteristics of the analysed systems were obtained by means of computer simulation. MATLAB were used for the simulation research. The section of the paper on laboratory research presents the results of the laboratory tests of the injection system of the internal combustion engine with special attention to the verification of simulated tests of selected pneumatic systems described with the use of fractional calculus.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 835--843
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Fuel Saving Operation for Coastal Merchant Ships using Weather Routing
Autorzy:
Takashima, K.
Mezaoui, B.
Shoji, R.
Powiązania:
https://bibliotekanauki.pl/articles/116404.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Weather Routing
route planning
Weather Navigation
Coastal Merchant Ship
Fuel Saving Operation
Dijkstra’s Algorithm
Simulation Study
Fuel Consumption
Opis:
It is well known that Weather Routing is one of the effective ship operation methods to reduce fuel consumption and many studies have been conducted to develop the effective calculation methods. However, most studies were performed focusing on the ocean going ships, and there were few studies made for coastal ships. The authors propose a minimum fuel route calculation method for coastal ships that use the precise forecasted environmental data and the propulsion performance data of the ship on actual seas. In the proposed method, we use the Dijkstra’s algorithm to calculate an optimum minimum fuel route suitable for coastal ships. Simulation study was carried out to evaluate the effectiveness of the proposed method using two coastal ships. As the result of study, the authors confirmed that the proposed calculation method is effective for fuel consumption reduction and is applicable for the operation of coastal merchant ships.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 4; 401-406
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 28

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