. "1024-123X" . . . "2013" . . . "10.1155/2013/307652" . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . . . . "Modelling of Freight Trains Classification Using Queueing System Subject to Breakdowns"@en . "Modelling of Freight Trains Classification Using Queueing System Subject to Breakdowns"@en . "Modelling of Freight Trains Classification Using Queueing System Subject to Breakdowns" . . "Dorda, Michal" . "RIV/61989100:27230/13:86086247" . . "Modelling of Freight Trains Classification Using Queueing System Subject to Breakdowns" . "11"^^ . "88943" . "[6B0B2997C06D]" . . "2013" . "Mathematical Problems in Engineering" . . . "27230" . "S" . "The paper presents a mathematical and a simulation model of the freight trains classification process. We model the process as a queueing system with a server which is represented by a hump at a marshalling yard. We distinguish two types of shunting over the hump - primary shunting represents the classification of inbound freight trains over the hump (it is the primary function of marshalling yards) and secondary shunting is for example represented by the classification of trains of wagons entering the yard via industrial sidings. Inbound freight trains are considered to be customers in the system and all needs of secondary shunting are failures of the hump because performing secondary shunting occupies the hump and therefore inbound freight trains can not be sorted. All random variables of the model are considered to be exponentially distributed with the exception of costumer service times which are Erlang distributed. The mathematical model was created using method of stages and can be solved numerically employing a suitable software tool. The simulation model was created using coloured Petri nets. Both models are tested in conditions of a marhalling yard."@en . . . "2"^^ . "000326761300001" . "2"^^ . "The paper presents a mathematical and a simulation model of the freight trains classification process. We model the process as a queueing system with a server which is represented by a hump at a marshalling yard. We distinguish two types of shunting over the hump - primary shunting represents the classification of inbound freight trains over the hump (it is the primary function of marshalling yards) and secondary shunting is for example represented by the classification of trains of wagons entering the yard via industrial sidings. Inbound freight trains are considered to be customers in the system and all needs of secondary shunting are failures of the hump because performing secondary shunting occupies the hump and therefore inbound freight trains can not be sorted. All random variables of the model are considered to be exponentially distributed with the exception of costumer service times which are Erlang distributed. The mathematical model was created using method of stages and can be solved numerically employing a suitable software tool. The simulation model was created using coloured Petri nets. Both models are tested in conditions of a marhalling yard." . . "http://www.hindawi.com/journals/mpe/2013/307652/" . "simulation, coloured Petri net; modelling; method of stages; Erlang distribution; queue; hump"@en . "Teichmann, Du\u0161an" . . . "RIV/61989100:27230/13:86086247!RIV14-MSM-27230___" .