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Wyświetlanie 1-5 z 5
Tytuł:
Problematics of modelling systems for technical service of means of transport
Autorzy:
Gołda, P.
Pyza, D.
Powiązania:
https://bibliotekanauki.pl/articles/244489.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
technical service
technical service system
modelling
obsługa techniczna
system obsługi technicznej
modelowanie
Opis:
Exploitation of means of transport is an important decision issue for transport companies that perform transport tasks. The means of transport during their operation lose their functional properties, which mean that they require technical service and repairs. The components of operating costs of means of transport are expenditures incurred for servicing and expenditures incurred for repairs. As the first cost component increases, the other will decrease and vice versa. We obtain the optimal economic effect of the means of transport when the sum of costs reaches the minimum value. The article presents the problems of optimization of the technical service system. This required identification of technical services and basic parameters characterizing the operation system. On this basis, a mathematical approach to the problem of modelling the maintenance system is presented, including the decision variables, constraints and the criterion function. The identification of the problem of modelling the technical service system is presented in the case study for modelling the technical service of means of transport – buses in the company providing passenger transport services in public transport.
Źródło:
Journal of KONES; 2018, 25, 1; 123-133
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logistics service for companies by warehouse facilities with different configurations in the logistics network
Autorzy:
Jacyna-Gołda, I.
Pyza, D.
Szczepański, E.
Powiązania:
https://bibliotekanauki.pl/articles/245039.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
logistics service
warehouse facilities
logistics network
Opis:
The paper presents an approach to the logistics service for companies by warehouse facilities with different configurations in the logistics network. Through the warehouses it is possible to combine internal logistics functions such as ordering, unloading, product receptions, confectioning, order picking. The occurrence of warehouse facilities and suitable strategy also affects the volume of stocks, because they allow for combine reserves and compensates for fluctuations in demand. Optimal control of the amount of inventory reduces the demand for warehouse space and associates storage costs. The appropriate configuration of the warehouse facilities in the logistics network is therefore critical for effective logistics service of manufacturing companies. In such logistics network, individual subsystems are related to each other by different types of relation. From these interconnections result logistic tasks performed by company logistics system. Their implementation is caused both externally and internally, wherein the first considerations arise from the environment, the other from production. External logistic task is the boundary conditions for storage process in manufacturing company. The configuration of storage process determines the execution of internal logistics tasks for the company. The article also presents the logistics network configuration taking into account both direct and indirect services.
Źródło:
Journal of KONES; 2015, 22, 3; 67-74
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical and environmental limitations of pro-ecological transport system designing
Autorzy:
Jacyna, M.
Żak, J.
Pyza, D.
Gołębiowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/241921.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
pro-ecological transport system
transport
air pollution
emission of exhaust fumes
EMITRANSYS
Opis:
Transport is one of the most environmentally destructive branches of economy. It contributes to environmental degradation and influences negatively on human live. It should therefore seek to reduce the negative impact on the environment. The paper presents many aspects of development of the national transport system. In article characterized technical constraints and environmental issues, which are applicable to the designing of pro-ecological transport system. Presented in it also indicators of the proposed design solution quality. In shaping the pro-ecological system the special role plays environmental restrictions, because they mainly determine the quality of solutions in terms of minimizing the negative impact of transport on the environment. Technical factors are equally important, because they allow, among others, reducing the external costs of congestions and allow on the creation of transport tasks on the appropriate level. In particularly, EU requirements for sustainable development of the transport system, the components of the external costs arising from the sphere of transport, indicators and ecological limitations in designing of pro-ecological transport system, ecological limitations, technical limitations, indicators for assessing pro-ecological transport system are presented in the paper.
Źródło:
Journal of KONES; 2014, 21, 4; 555-564
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification and analysis of parameters for the areas of the highest harmful exhaust emissions in the model emitransys
Autorzy:
Ambroziak, T.
Gołębiowski, P.
Pyza, D.
Jacyna-Gołda, I.
Merkisz-Guranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/247522.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
proecological transport system
transport
air pollution
emission of exhaust gases
EMITRANSYS
Opis:
A scheme has been developed to be utilized for solving the interaction between wing aerodynamic loads and the flexibility of wing structures under a quasi static assumption. The interaction is implemented through a link between the nodes of finite element model and the grids of transonic small disturbance model. The particular finite element responses, namely translational displacement vectors (TDV), are utilised for reconstructing the deflected wing surfaces. So in each iteration, the updated surfaces are involved as the parent for regenerating the TSD grids. The criteria of the Euclidean norm is applied for evaluating the convergency of aero-structure interaction. Catia-V5, is fully employed to manage three dimensional geometries for developing the model of wing structures, calculating grids and aerodynamic loads, as well as for reconstructing the updated wing surfaces. Numerous functions and objects of Catia are employed by conducting particular accesses via component object models using Microsoft Visual Basic.Net. A case study is excersized to demonstrate the interaction in transonic speed. The results shown that the scheme is very good in the way performing the interaction in quasi static condition. The utilization of TDV for generating the deflected wing surfaces indicates the capability of high fidelity deformations with respect to the complexity of finite element model
Źródło:
Journal of KONES; 2013, 20, 3; 9-20
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of road transport on emission of toxic substances in Poland against the EU countries
Autorzy:
Jacyna, M.
Ambroziak, T.
Merkisz-Guranowska, A.
Pielecha, J.
Jacyna-Gołda, I.
Lewczuk, K.
Pyza, D.
Wasiak, M.
Szczepański, E.
Żak, J.
Powiązania:
https://bibliotekanauki.pl/articles/243251.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
road transport
emission of harmful compounds
ecology of transport
Opis:
The paper is a result of research work carried out under the project EMITRANSYS for shaping ecological transport system. The paper presents selected aspects of emission and concentration of harmful compounds of exhaust gases generated by road transport. It also presents the share of harmful compounds emitted by road transport in comparison with the emission from other sectors of economy. Transport policy should encourage the usage of energyefficient and less environmentally damaging modes of transport and their efficient use. The paper analyses the emissions of selected pollutants and their estimated contribution to the total emissions of road transport. It also presents selected aspects of the identification of areas with the highest emissions of harmful compounds in Poland against the European Union. This analysis provides a basis to identify the instruments to prevent and reduce pollution arising from transport activities. In particular, variable emission of selected components of fumes according to the velocity of passenger vehicle. the measured values for NO2 concentration in the UE countries in 2011, the measured values for CO concentration in UE countries in 2011, the measured values for PM10 concentration in UE countries in 2011, the measured values for PM2.5 concentration in UE countries in 2011 are presented in the paper.
Źródło:
Journal of KONES; 2014, 21, 3; 133-140
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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