A model of a transportation system is expected to be useful in simulations of a real system to solve given transportation tasks. A connection graph is routinely used to describe a transportation system. Vertices can be train stations, bus stops, airports etc. The edges show direct connections...

Distributed lag models are an important tool in modeling dynamic systems in economics. In the analysis of composite forms of such models, the component models are ordered in parallel (with the same independent variable) and/or in series (where the independent variable is also the dependent...

During the last couple of years, there has been a tendency to include more and more political goals into public procurements, such as environmental and societal considerations. This can result in higher prices paid by the public sector compared with similar procurements in the private sector....

This paper describes a method for the allocation of CO2 emission reduction technologies to sources of emissions, based on dynamic programming. The purpose of the application of the method is to develop an efficient strategy of allocating financial means for reducing CO2 emissions from a set of...

In this paper an iterative multicriteria closed-auction conducted with the use of a multi-agent computer-based system is analyzed. This system supports the submission of offers, multicriteria analysis carried out by the organizer of the auction, simulation, and analysis of the behavior of...

This article discusses the environmental effects of transport, with a particular focus on the natural environment. The authors present methods used for assessing the influence of investments in transport infrastructure on the environment, as well as the concept of a simulation model, which...

The analysis presented in this paper is focused on the basic properties of discrete distributed lag models. Such models are commonly used to model dynamic systems in different applications. In the presented considerations, time-varying distributed lags are analyzed. The composite distributed lag...

This paper presents a multi-criteria model for determining the order size for materials used in production. It is assumed in this model that the consumption rate of each material is a random variable with a known probability distribution. Using such a model, in which the purchase cost of...

The problem of finding an appropriate transportation plan for a transport company collaborating with a window manufacturer to reduce transport costs by minimizing the total distance travelled and provide a minimum car fleet is presented in this paper. The problem involves 3 major manufacturing...

We investigate the characteristics of price patterns in an oligopoly market with costs for switching a provider. We consider two regimes of a company’s access to information. In the benchmark scenario, firms make decisions based on perfect information about demand. In the second – more...