Temat: transport process efficiency - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Method for assessment of transport means failures repairs
Autorzy:: Muślewski, Ł.
Woropay, M.
Neubauer, A.
Szubartowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/246101.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
operation process
semi-Markov model
efficiency
Opis:: An analysis of experimental tests and a literature survey of the issue revealed that the problems connected with assessment of costs and effectiveness of transport means repairs has a significant influence on their operation efficiency. Operating factors affecting the elements of technical objects cause negative changes in their features resulting in failures. The failures are referred to as events which significantly impair the vehicle operation efficiency, safety and reliability. On the basis of experimental tests concerning times of failures occurrence, it was found that the set of failures can be divided into subsets of primary and secondary failures. The tests results revealed that the most frequent cause of secondary failures occurrence was improperly performed primary repairs. Primary failures are not related to each other and they appear randomly. However, secondary failures are related to each other as their occurrence is conditioned by the primary failure and results from an inappropriate performance of the successive secondary failure. Basing on an analysis of the author 's own tests results, it was established that failures of transport means used in real transport systems are the effect of impact of various forcing factors. Some failures result from the natural wear of machine elements, whereas, other failures can be caused by inappropriate repair of the previous damage. Thus, there occur the so called secondary failures in a short period of time. In connection with this, high efficiency of the repair performance is of primary importance as it largely affects efficiency of transport tasks accomplishment. In this article, there has been discussed a method developed for assessment of repair costs connected with elimination of secondary failures and its influence on the studied transport system operation efficiency. Familiarity with available technologies for repairs of primary failures as well as with costs of work and costs connected with technical equipment of the repair stations enables specification of the lowest costs necessary for reduction of the number of secondary failures and the average time of their repairs.
Źródło:: Journal of KONES; 2011, 18, 3; 299-307
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Ocena wpływu kształtu dyszy ssącej na wydajność i opory przepływu w podciśnieniowym transporcie pneumatycznym
Evaluation of suction nozzle shape influence at efficiency and pressure drop in vacuum pneumatic conveying
Autorzy:: Jóśko, E.
Skotnicki, P.
Powiązania:: https://bibliotekanauki.pl/articles/392043.pdf
Data publikacji:: 2011
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
Tematy:: transport pneumatyczny
transport podciśnieniowy
dysza ssąca
kształt dyszy
wydajność procesu
pneumatic conveying
vacuum conveying
suction nozzle
nozzle shape
process efficiency
Opis:: W pracy przedstawiono wyniki badań nad określeniem wpływu kształtu dyszy ssącej na wydajność i opory przepływu dwufazowego gazu i ciała stałego w typowej instalacji podciśnieniowego transportu pneumatycznego. Do analiz wykorzystano płaskie dysze ssące o kącie rozwarcia Alfa = 40o i 60o. W przypadku płaskich dysz stożkowych, dzięki rozwinięciu powierzchni kontaktu dyszy z lustrem materiału, więcej powietrza jest pobierane przez dyszę, przez co maleje ryzyko blokady rurociągu. Takie rozwiązanie pozwala na zastosowanie tego typu dysz do transportu materiałów drobnoziarnistych, które ze względu na ograniczone możliwości dysz rurowych nie mogły być transportowane podciśnieniowo.
The aim of the research was to determine influence of the suction nozzle shape at nature of two phase gas-solid flow and pressure drop in typical vacuum pneumatic conveying systems. In the research there were used flat suction nozzles with flare angle Alfa = 40o, 60o. Flat conical nozzles, due to expanded contact surface with material level, suck more air what decreases risk of pipeline clogging. This solution enables use of the above nozzles for transport of fine-grained materials, which because of limited possibilities of pipe nozzles could not be vacuum transported.
Źródło:: Prace Instytutu Ceramiki i Materiałów Budowlanych; 2011, R. 4, nr 7, 7; 108-117
1899-3230
Pojawia się w:: Prace Instytutu Ceramiki i Materiałów Budowlanych
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Energia odnawialna i emisje w transporcie
Renewable energy and emissions in transportation
Autorzy:: Flizikowski, J.
Tomporowski, A.
Antczak, M.
Powiązania:: https://bibliotekanauki.pl/articles/2072003.pdf
Data publikacji:: 2014
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: biopaliwa
energia odnawialna
efektywność procesu
transport
sterowanie ekologiczne
biofuels
renewable energy
process efficiency
transportation
ecological control
Opis:: W pracy wykazano potrzebę działań technologicznych twórczych, a szczególnie zintensyfikowania rozwiązań w obszarze efektywności energetycznej, ekologicznej i ekonomicznej technologii przemysłowych, transportowych i życia codziennego.
Need for action and, in particular, creative technology solutions to increase energy, ecological and economic efficiency in industry, transportation and daily life is demonstrated in the paper.
Źródło:: Inżynieria i Aparatura Chemiczna; 2014, 2; 69--71
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Model of multimodal transport node functioning
Autorzy:: Naumov, V.
Nagornyi, I.
Litvinova, Y.
Powiązania:: https://bibliotekanauki.pl/articles/223999.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: transport node
technological process
logistics management
system approach
efficiency criterion
mathematical model
węzeł transportowy
proces technologiczny
zarządzanie logistyczne
podejście systemowe
kryteria efektywności
model matematyczny
Opis:: To increase the efficiency of transport nodes functioning taking into account the logistics management principles it is necessary to optimize the structure and capacity of transport nodes' production resources, and to develop such a method for calculating of joint schedules for vehicles and freight hubs of the transport node, which takes into account stochastic nature of the parameters of material and informational flows. For solving the problems of optimal management of transport nodes functioning processes it is proposed to use the specific efficiency indicator, which is determined as a ratio of total costs of clients servicing in transport node to the costs of production resources used while servicing. According to the used approach for formalization of the transport node internal processes, development of the simulation model was implemented on the base of object-oriented programming principles. TransportNode.dll class library has been used as basic tool for simulations. The model implemented on the base of the library allows to take into account stochastic nature of demand and probabilistic nature of technological processes in transport nodes. Some results of numeric simulations for the loading area “Amur-Gavan” of Dnipropetrovsk River Port have been described in the paper.
Źródło:: Archives of Transport; 2015, 36, 4; 43-54
0866-9546
2300-8830
Pojawia się w:: Archives of Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of operation efficiency of selected transport systems
Autorzy:: Muślewski, Ł.
Lewalski, M.
Aleksandrowicz, P.
Landowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/245072.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
efficiency
operation process
maintenance process
semi-Markov process
simulation tests
Opis:: This study deals with the problems connected with evaluation of technical systems efficiency of particular transport systems. The main goal of such a system operation is its effective functioning, through rational control of its particular activities and subsequent processes. A literature analysis of the definition of the efficiency term has been made. A real transport system has been accepted to be the research object. The system belongs to the group of sociotechnical systems in which evaluation of its operation efficiency depends on performance of operators, transport means and the impact of environmental factors. Criteria and methods of operation efficiency evaluation have been determined in this study as well as assessment indexes for transport systems. It has been shown that evaluation of a repair efficiency has a large influence on the efficiency of the whole system operation, especially the influence of secondary failure repairs, on the values of particular efficiency indexes. A semi-markov model of operation and maintenance of transport means used in the research object has been developed. This model provides the basis for evaluation of the influence of the processes involved in preparing transport means for service on the system operation efficiency. Moreover, the research also describes how to verify the developed model and present its simulation tests. The study is summarized with conclusions formulated based on the evaluation of the influence of the operation and maintenance processes on the investigated transport system operation efficiency.
Źródło:: Journal of KONES; 2016, 23, 3; 351-358
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Semi-Markov model of quality state changes of a selected transport system
Autorzy:: Landowski, B.
Muślewski, Ł.
Knopik, L.
Bojar, P.
Powiązania:: https://bibliotekanauki.pl/articles/241811.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
efficiency
operation process
maintenance process
semi-Markov process
simulation tests
Opis:: The study deals with the problems connected with evaluation and analysis of transport systems operational quality. The research object is a real, sociotechnical system (of the type H-M-E) whose functional quality is affected by: operators, equipment and technical state of he operated vehicles and the environmental impact. A scheme of an assessment model was built on the basis of a developed concept of a system operational quality and a random process was defined to be used for the analysis. The assessment process involves investigating the variability degree of properties included in the resultant model in a given time and determining whether and to what degree the obtained values meet the requirements of the system appropriate operational quality. On the basis of the above assumptions and in result of experimental tests, four qualitative states of a transport system functioning, which represent intervals of values of the obtained grades in given time moments, were distinguished. The study presents a model of system operation qualitative state changes developed with the use of Markov chain inserted into a certain semi-Markov process. A graph and a matrix for probability of transition between the states were created and boundary distributions of the process were determined on the basis of experimentally obtained data. A system of equations was determined for the distinguished Markov chain, on the basis of which a mathematical model for assessment and control of operational quality of selected types of transport systems will be built.
Źródło:: Journal of KONES; 2017, 24, 4; 141-148
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Effektivität und Effizienz von Transportprozessen
Effectiveness and Efficiency of Transport Processes
Autorzy:: Witte, H.
Powiązania:: https://bibliotekanauki.pl/articles/134356.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: effectivity
efficiency
transport
transport process
processes
efektywność
proces transportu
procesy
Opis:: Die Verwirklichung von Effektivität und Effizienz ist ein Grundanliegen der Ökonomie. Dieses Anliegen gilt auch für die Transportökonomie. Ziel des vorliegenen Artikels ist es, die Messung der Effektivität und der Effizienz von Transportprozessen darzustellen. Ausgangspunkte sind die Definitionen von Transportprozessen, der Effektivität und der Effizienz. Da Transport im Raume (Raumüberwindung) stattfindet, ist nicht nur die übliche ökonomische Effizienz, sondern auch die räumliche Effizienz zu berücksichtigen. Die Messung der Effektivität und der Effizienz von Transportprozessen wird anhand der Grundstrukturen von Transportprozessen (glatte, konvergierende, divergierende und umgruppierende) demonstriert. Hinsichtlich der räumlichen Effizienz zeigt sich, dass nur ein glatter Transportprozess effizient ist. Dieses Ergebnis ist nicht überraschend, da bekannt ist, dass die Luftlinienentfernung der kürzeste Weg ist. Leider sind in der Praxis glatte Transportprozesse mit Luftlinienentfernung nicht immer möglich.
In this article it is demonstrated that the effectivity and the efficiency of transport processes are measurable. Basis of the measurement procedure are the definitions of transport processes, the effectivity and the efficiency. We have to make a difference between two definitions of efficiency. First there is the well-known economic efficiency. Second we have to regard the spatial efficiency of a transport process. The spatial efficiency of a transport process can be the precondition for the economic efficiency of the process. The measurement of the effectivity and the efficiency of transport processes are demonstrated using the basic structures of transport processes: the straight (direct) process, the converging process, the diverging process and the regrouping process. With a spatial efficiency of one the straight (direct) process is the best model for planning transport processes. This result is not surprising. In a straight (direct) process all transport distances are equal with the air distance (beeline). All transport processes which are different from the air distance have less spatial efficiency.
Źródło:: Problemy Transportu i Logistyki; 2018, 41, 1; 163-176
1644-275X
2353-3005
Pojawia się w:: Problemy Transportu i Logistyki
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Rola spedytora w organizacji procesu transportowego na rynku europejskim
The role of a freight forwarder in the organization of a transport process on the European market
Autorzy:: Łukasik, Z.
Kuśmińska-Fijałkowska, A.
Olszańska, S.
Powiązania:: https://bibliotekanauki.pl/articles/316445.pdf
Data publikacji:: 2018
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: spedycja
spedytor
przewóz ładunków
proces transportowy
zarządzanie procesem transportowym
efektywność transportu
just-in-time
shipping
forwarder
cargo
transport process
management of transport process
efficiency of transport
Opis:: Przewóz ładunków wymusza od spedytora odpowiedniego doświadczenia w planowaniu i realizacji procesu transportowego, bowiem fundamentalnym celem zarządzania procesem transportowym jest nieustanna poprawa skuteczności i efektywności organizacji transportu przy jednoczesnym zapewnieniu najwyższych standardów obsługi klienta. W artykule autorzy przeprowadzili badania procesu transportowego na obiekcie rzeczywistym. Badaniom poddali trasę Jasło-Berlin-Szczecin-Jasło implementując system monitoringu, w celu usprawnienia procesu przewozowego. W wyniku analizy przedstawiono praktyczne aspekty planowania, organizowania i koordynowania transportu.
The transport of cargo forces appropriate experience from the freight forwarder in planning and implementing the transport process, as the fundamental goal of managing the transport process is to constantly improve the efficiency and effectiveness of freight organization while ensuring the highest of customer service. In the article, the authors carried out research of a transport process on a real object. The Jasło-Berlin-Szczecin-Jasło route was subject to research by implementing a monitoring system for the purposes of freight improvement. The analysis presents practical aspects of planning, organizing and coordinating transport.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2018, 19, 6; 919-923, CD
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Vehicle relocation efficiency - a case study of the parking company in the City of Zagreb
Autorzy:: Šimunović, Ljupko
Protega, Veselko
Ćosić, Mario
Bandov, Davor
Powiązania:: https://bibliotekanauki.pl/articles/2098120.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: transport process efficiency
indicators of transport vehicle utilisation
systematic and integrated evaluation of the productivity
wydajność procesu transportowego
wskaźniki wykorzystania środków transportu
systematyczna ocena produktywności
zintegrowana ocena produktywności
Opis:: There is a need for vehicle relocation, whether for delivering new vehicles to their selling destinations, pulling inoperative or damaged vehicles out of traffiic, or removing illegally parked vehicles from the street. The relocation of illegally parked vehicles in the City of Zagreb is done by constantly monitoring parked vehicles or through citizen telephone alerts. The paper analyses the vehicle relocation service of the Zagrebparking company, which, in addition to overseeing car park management in public car parks and garages, is in charge of removing illegally parked vehicles. Due to the cyclic nature of its operations, a high share of empty rides, high vehicle investment costs, small quantities of cargo transported, high fuel prices, and high fuel consumption in the urban environment, Zagrebparking’s Vehicle Relocation Department operates with unnecessarily high costs. In this paper, vehicle relocation efficiency is analysed by presenting indicators of vehicle utilisation as part of a systematic evaluation of the company. Improvements to the current service are also provided.
Źródło:: Transport Problems; 2021, 16, 1; 39--50
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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