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Wyświetlanie 1-15 z 25
Tytuł:
Determining the waterway parameters based on statistical data from simulation trials by means of regression method
Autorzy:
Gucma, L.
Powiązania:
https://bibliotekanauki.pl/articles/320851.pdf
Data publikacji:
2000
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
navigation
waterway
computer simulation
statistical analysis
Opis:
Paper presents method of determining waterway parameters by means of multiple and linear regression method. The statistical data from computer simulation model are applied to determine waterway parameters. The method can be used for designing water areas and is more accurate than analytical method and less expensive than simulation one.
Źródło:
Annual of Navigation; 2000, 2; 37-45
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of influence of drive system configurations of a four wheelled robot on its mobility
Autorzy:
Trojnacki, M.
Powiązania:
https://bibliotekanauki.pl/articles/384552.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
mobile robot
mobility analysis
dynamics model
computer simulation
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 4; 65-70
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of roller bearing cages
Autorzy:
Kohar, R.
Krzysiak, Z.
Lukac, M.
Brumercik, F.
Powiązania:
https://bibliotekanauki.pl/articles/132167.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
computer simulation
dynamic analysis
mathematical models
roller bearings
Opis:
The aim of this paper is to detail the creation of a roller bearing model with flexible body cages in the Adams program suite for subsequent dynamic analysis and to obtain information about kinematic and dynamic relationships of steel and plastic cages under various operating conditions. The bearing model was made to closely resemble its real-life counterpart, which allows us to estimate load conditions, dynamic conditions of individual bearing parts and interactions between them.
Źródło:
Advanced Technologies in Mechanics; 2016, 3, no. 2 (7); 2-11
2392-0327
Pojawia się w:
Advanced Technologies in Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic aspects of component importance analysis for complex marine systems
Autorzy:
Chybowski, L.
Gawdzińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/135038.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
importance analysis
complex system
sensitivity analysis
marine system
economic aspects
computer simulation
Opis:
The paper presents the application of cost-based, component-importance measures for complex technical systems. A stern tube sealing system installed on a sea vessel was used as an example of a complex technical system. Selected statistics of a ship’s operation losses were calculated. Selected, known-importance measures were presented and the authors’ own approach to cost-based, component-importance analysis was shown. The following measures were discussed: the operation-interruption cost index, the maintenance potential, the simulation-based maintenance index, and maintenance and operational costs. A description of factors influencing the importance of the technical system components was provided.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 51 (123); 59-65
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Fluidity of Al-Si Alloy: Computer Simulation of the Influence of Temperature, Composition, and Pouring Speed
Autorzy:
Futáš, P.
Petrík, J.
Pribulová, A.
Blaško, P.
Palfy, P.
Powiązania:
https://bibliotekanauki.pl/articles/351852.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si
fluidity
computer simulation
regression analysis
Monte Carlo method
Opis:
The purpose of this study is to identify relationships between the values of the fluidity obtained by computer simulation and by an experimental test in the horizontal three-channel mould designed in accordance with the Measurement Systems Analysis. Al-Si alloy was a model material. The factors affecting the fluidity varied in following ranges: Si content 5 wt.% – 12 wt.%, Fe content 0.15 wt.% – 0.3 wt. %, the pouring temperature 605°C-830°C, and the pouring speed 100 g · s-1 – 400 g · s-1. The software NovaFlow&Solid was used for simulations. The statistically significant difference between the value of fluidity calculated by the equation and obtained by experiment was not found. This design simplifies the calculation of the capability of the measurement process of the fluidity with full replacement of experiments by calculation, using regression equation.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1799-1804
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity of the game control of ship in collision situations
Autorzy:
Lisowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/258832.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine transport
safety of navigation
game control
sensitivity analysis
computer simulation
Opis:
The paper introduces the application of the theory of deterministic sensitivity control systems for sensitivity analysis taking place in game control systems of moving objects, such as ships. The sensitivity of parametric model of game ship control process and game control in collision situations - sensitivity to changes in its parameters have been presented. First-order and k-th order sensitivity functions of parametric model of the process and game control are described. The structure of the game ship control system in collision situations and the mathematical model of game control process in the form of state equations are given. Characteristics of sensitivity functions of the model and game ship control process on the base of computer simulation in Matlab/Simulink software have been presented. At the end are given proposals regarding the use of sensitivity analysis to practical synthesis of computer-aided system navigator in potential collision situations.
Źródło:
Polish Maritime Research; 2015, 4; 27-33
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Komputerowa symulacja zmienności rat długoterminowych kredytów w PLN i CHF zaciągniętych w latach 2004-2008
Computer simulation of payments volatility for longterm loans in PLN and CHF drawn in 2004-2008
Autorzy:
Twardochleb, Michał
Powiązania:
https://bibliotekanauki.pl/articles/432279.pdf
Data publikacji:
2015
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
long-term loans
foreign exchange risk
computer simulation
financial risk analysis
Opis:
This paper presents the results of using proprietary simulation software for the analysis of the financial risk associated with long-term taking loans in domestic and foreign currency. The study was conducted for loans in PLN and CHF incurred in different periods characterized by a different situation on the financial markets (significantly different currency exchange rates or interest rates, another entry in the „economic cycle”). The theoretical part of the paper describes basic concepts in long-term loans, and also shows the major assumptions for analyzing financial risks arising from incurring long-term obligations in domestic or foreign currency. In the practical part the assumptions of simulation of volatility of future fixed repayment level for loans taken out in PLN or CHF between 2004 and 2008 were described. The results of simulation along with the calculation of the total amount paid in future periods for analyzed variants of credit were also presented.
Źródło:
Informatyka Ekonomiczna; 2015, 2(36); 50-59
1507-3858
Pojawia się w:
Informatyka Ekonomiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of the availability of resources, the allocation of buffers and number of workers on the effectiveness of an assembly manufacturing system
Autorzy:
Kłos, S.
Trebuna, P.
Powiązania:
https://bibliotekanauki.pl/articles/407452.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computer simulation
availability of resources
buffer allocation
throughput analysis
work-in-progress
Opis:
This paper proposes the application of computer simulation methods in order to analyse the availability of resources, buffers and the impact of the allocation of workers on the throughput and work-in-progress of a manufacturing system. The simulation model of the production system is based on an existing example of a manufacturing company in the automotive industry. The manufacturing system includes both machining and assembly operations. Simulation experiments were conducted vis-`a-vis the availability of the different manufacturing resources, the various allocations of buffer capacities and the number of employees. The production system consists of three manufacturing cells – each cell including two CNC machines – and two assembly stations. The parts produced by the manufacturing cells are stored in buffers and transferred to the assembly stations. Workers are allocated to the manufacturing cells and assembly stations, but the number of workers may be less than number of workplaces and are thus termed ‘multi-workstations’. Using computer simulation methods, the impact of the availability of resources, the number of employees and of the allocation of buffer capacity on the throughput and work-in-progress of the manufacturing system is analysed. The results of the research are used to improve the effectiveness of manufacturing systems using a decision support system and the proper control of resources. Literature analysis shows that the study of the impact of buffer capacities, availability of resources and the number of employees on assembly manufacturing system performance have not been carried out so far.
Źródło:
Management and Production Engineering Review; 2017, 8, 3; 40-49
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BoneCreo: a novel approach for generating a geometric model of the bone structure
Autorzy:
Wrona, A.
Powiązania:
https://bibliotekanauki.pl/articles/306211.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
model numeryczny
kości
symulacja komputerowa
numerical model
bone tissue
image analysis
computer simulation
Opis:
Bones, the fundamental part of the skeleton, are constantly subjected to many biological processes including growth, feeding and remodelling. Remodelling causes changes in bone structure that may be difficult to notice on a day-to-day basis but become significant over the longer time span. It acts on the cancellous and cortical bone tissue, causing alterations in thickness and spatial arrangement in the first and alternations in pore size in the second. In healthy individuals such changes are a part of the natural bone remodelling process explained by Wolff’s law. However, the direction of such changes is difficult to predict in patients in various pathological states in which bone health is affected. Here, we present a method to generate a computer based geometric model of the bone structure based on the cancellous tissue structure images. As a result we obtained a geometric model of the structure corresponding to the physical model of the cancellous bone. Such a model can be used in computer simulation to predict the remodelling changes in the healthy and pathological bone structures.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 3; 3-12
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis and computer simulations of burnishing rolling process of rough surface
Analiza numeryczna i symulacje komputerowe procesu nagniatania powierzchni chropowatych
Autorzy:
Kułakowska, A.
Chodór, J.
Bohdal, Ł.
Kałduński, P.
Żurawski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/253514.pdf
Data publikacji:
2015
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
numerical analysis
computer simulation
rough surface
burnishing
analiza numeryczna
symulacja komputerowa
powierzchnia chropowata
nagniatanie
Opis:
In this study the process of burnishing rolling is considered as a geometrical and physical boundary and initial value problem, with unknown boundary conditions in the contact area. 3D dynamic explicit method for burnishing rolling process with taking into account surface roughness after turning (as previous treatment) under ANSYS environment were established. The analysis covered surfaces characterized by vertical angle of the asperities equal: 75°. The simulation results (i.e. surface deformation, states of strain and stresses, material behavior) were evaluated. Numerical algorithms can be used for an assessment of the influence of the surface after previous treatment on the burnished product.
W pracy proces nagniatania naporowego tocznego rozpatrzono jako geometrycznie i fizycznie nieliniowe zagadnienie brzegowo-początkowe, z nieznanymi warunkami brzegowymi w obszarze kontaktu. symulacje komputerowe 3D przeprowadzono, z zastosowaniem metody explicit w środowisku Ansys. Powierzchnie do nagniatania traktowano jako chropowate, przygotowane w obróbce poprzedzającej toczeniem. Analizą objęto powierzchnie charakteryzujące się kątem wierzchołkowym nierówności powierzchni O=75°. Uzyskane wyniki (deformacje, stany odkształceń i naprężeń) przedstawiono w postaci wykresów i map rozkładów.
Źródło:
TTS Technika Transportu Szynowego; 2015, 12; 895-899, CD
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using computer simulation method to improve throughput of production systems by buffers and workers allocation
Autorzy:
Kłos, S.
Trebuna, P.
Powiązania:
https://bibliotekanauki.pl/articles/406730.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computer simulation
series-parallel production line
buffer allocation
throughput analysis
life span of products
Opis:
This paper proposes the application of computer simulation methods to support decision making regarding intermediate buffer allocations in a series-parallel production line. The simulation model of the production system is based on a real example of a manufacturing company working in the automotive industry. Simulation experiments were conducted for different allocations of buffer capacities and different numbers of employees. The production system consists of three technological operations with intermediate buffers between each operation. The technological operations are carried out using machines and every machine can be operated by one worker. Multi-work in the production system is available (one operator operates several machines). On the basis of the simulation experiments, the relationship between system throughput, buffer allocation and the number of employees is analyzed. Increasing the buffer capacity results in an increase in the average product lifespan. Therefore, in the article a new index is proposed that includes the throughput of the manufacturing system and product life span. Simulation experiments were performed for different configurations of technological operations.
Źródło:
Management and Production Engineering Review; 2015, 6, 4; 60-69
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corona Modeling for the Transient Analysis, Steady State and Corona Loss Performance of Transmission Lines
Autorzy:
Saied, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/262685.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
corona
power transmission lines
electromagnetic modeling
computer simulation
losses
transient analysis
shunt compensation
optimization
Opis:
This paper addresses the steady state analysis and the electromagnetic transients of overhead power transmission lines exhibiting corona. After a brief survey of the currently available modeling techniques, an alternative approach to the simulation of the corona discharge is presented. It is based on adding voltage-dependent current sources at prespecified nodes within the line’s lumped, ladder-shaped, equivalent circuit including an aduqate number of sections. The characteristics of these current sources can be determined using the usually available corona power loss measurements under power frequency sinusoidal voltage conditions. The line model is used for finding its transient response using time domain techniques. Several voltage excitation waveforms and magnitudes as well as different line’s loading conditions are investigated. As a further application of the suggested approach, the minimizion of the total corona losses of a long shunt compensated line will be considered as an additional criterion in the process of identifying the appropriate rating and location of the compensating coil primarily used for improving the line’s voltage profile.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2013, 16, 2; 11-20
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wybranych czynników na polepszenie wskaźnika OEE na wybranym odcinku procesu produkcyjnego
The Impact of Selected Factors on the Improvement of the OEE Indicator on a Selected Section of the Production Process
Autorzy:
Leśniewski, Artur
Plaszczyk, Jakub
Karchut, Piotr
Kiljan, Anna
Jonda, Ewa
Lipiński, Tomasz
Nowacki, Krzysztof
Powiązania:
https://bibliotekanauki.pl/chapters/28011076.pdf
Data publikacji:
2023-12-14
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
analiza
FlexSim
proces produkcyjny
symulacja komputerowa
wskaźnik OEE
analysis
production process
computer simulation
OEE
indicator
Opis:
Celem rozdziału było określenie wpływu czynników losowych, takich jak brak operatora lub awaria maszyny, na wskaźnik OEE oraz analiza otrzymanych wyników. Dokonano przeglądu literaturowego z dziedziny modelowania oraz zarządzania procesami. Następnie scharakteryzowano wskaźnik OEE oraz jego składowe. W części badawczej skupiono się na obliczeniu wskaźnika dla różnych losowych czynników występujących w procesie produkcyjnym. W rezultacie przeprowadzono trzy symulacje procesu, których wyniki przedstawiono.
The aim of the chapter was to determine the impact of random factors, such as the lack of an operator or a machine failure, on the OEE index and the analysis of the results obtained. A literature review in the field of modeling and process management was carried out. Then, the OEE indicator and its components were characterized. The research part focused on calculating the index for various random factors in the production process. As a result, three process simulations were carried out, for which the results were presented.
Źródło:
Potencjał innowacyjny w inżynierii materiałowej i zarządzaniu produkcją; 203-212
9788371939457
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the efficiency of traffic light system with utilization of computer simulation based on Szczecin example
Autorzy:
Iwan, S.
Rymer, W.
Małecki, K.
Powiązania:
https://bibliotekanauki.pl/articles/393583.pdf
Data publikacji:
2017
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
computer simulation
traffic optimization
transport management
traffic analysis
symulacja komputerowa
optymalizacja ruchu
zarządzanie transportem
analiza ruchu
Opis:
The dynamics of development of transport systems in cities makes it harder to control the proper traffic management. It happens that decisions on the reorganization of the traffic and utilization of automated control are made on the basis of insufficient principles. Due to that, the costs of the technical implementations are spent without a simultaneous traffic improvement. For this reason, it is necessary to use tools allowing an efficient analysis of the current and future situation of the road. Utilization of a computer simulation seems to be most effective. The paper is focused on an example of computer simulation analyses of the two integrated cross roads in Szczecin. Based on the simulation model, the assessments of the planned implementation solutions were realized. It includes the analysis of the appropriateness of traffic lights utilization for the analyzed road sections.
Źródło:
Archives of Transport System Telematics; 2017, 10, 2; 8-13
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temporal evaluation criteria of project-oriented socio-economic and technical systems development
Temporal'nye kriterii ocenki razvitija proekto-orientirovannykh social'no-ehkonomicheskikh i tekhnicheskikh sistem
Autorzy:
Rach, V.
Sultan, M.
Powiązania:
https://bibliotekanauki.pl/articles/793264.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
temporal order
technical system
socioeconomic system
comparative analysis
computer simulation
present state
development process
calculation method
computer experiment
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 2
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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