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Game theory approach to optimizing of public transport traffic under conditions of travel mode choice by passengers

100%

Koryagin M.

Transport Problems

2014

tom T. 9, z. 3

117--124

Consideration was given to the problem of making decisions on public transport management. Three parties making decisions were marked out: passenger flow, transport operator and municipal authorities. Passengers choose between public and private transport evaluating the value of time. The value of time is modeled by uniform distribution. The transport operator seeks to maximize the profit by varying the public transport frequency. The decrease in the frequency decreases the passenger flow of the public transport and cost of transportation. It’s important for the municipal authorities to determine the frequency minimizing the time loss of the population and cost of transportation. The existence of the decision concerning the problems of management was proven. The numerical example characterizing the influence of the parameters on the problem solution was given.

Рассмотрена проблема принятия решений по управлению городским пассажирским транспортом. Выделены три объекта принимающих решения: пассажиропоток, транспортный оператор и муниципальные органы власти. Пассажиры выбирают между общественным и личным транспортом на основе оценки стоимости своего времени. Стоимость времени пассажиропотока считается распределенным равномерно. Транспортный оператор стремится максимизировать прибыль, изменяя частоту движения. Снижение частоты движения снижает пассажиропоток на общественном транспорте и транспортные расходы. Для муниципалитета важно определить частоту движения, минимизирующую потери времени населения и транспортные расходы. Доказано существование решения в задачах управления. Приведен численный пример описывающий влияние параметров на решение задачи.

Improving the organization of the shovel-truck systems in open-pit coal mines

63%

Koryagin M. , Voronov A.

Transport Problems

2017

tom T. 12, z. 2

113--122

The aim of the study is to reduce idle times of mining trucks and shovels in an open-pit coal mine. A heuristic algorithm for making dispatching decisions in conditions of dynamic allocation of trucks is developed. Priority parameters for choosing the shovel after the end-of-truck unloading are introduced. Also, an algorithm for searching for the optimal priority parameters to satisfy the required efficiency criterion is developed. This algorithm is based on a simulation model of a shovel-truck system. The proposed approach is applicable in terms of the group of shovels with a common dump point in various open-pit coal mines. The importance of this work lies in the fact that the proposed model takes into account the random factors related with the duration of loading and dumping, truck movement, repair of shovels and haul trucks, as well as the duration of periods between repairs.