Simulation modeling of the dynamics of competitive interaction between manufacturers of light-engine aircraft equipment in the conditions of volumetric competition

Enterprises of the domestic light-engine aircraft industry are in tough competition both in the domestic and foreign markets. To minimize the risks associated with strategic interaction with participants in these markets, enterprises should form their production programs based on a comprehensive analysis of the competitive environment. Determination of the optimal equilibrium values of the output volumes for each participant does not provide information on the dynamics of the interaction of competitors. In this regard, in order to describe the dynamics of market relations, it becomes necessary to develop a dynamic simulation model for the development of the light aircraft market. The paper considers a dynamic model of the problem of choosing a production program by enterprises producing light aircraft equipment in the duopole market, using a discrete simulation computer model. This model is represented by several algorithms generated in the Simulink software package (Matlab), using the library of standard operators of this package. This model allows to determine the trajectories of changes in the equilibrium values of quantities, prices and gross income. Also, using this model, it is possible to assess the influence of the costs incurred by enterprises on the implementation of the production program, on the results of market interaction, to determine the most significant parameters and, on this basis, to form a decision on the choice of a competitive strategy.

Colour preference, naturalness, vividness and colour quality metrics, Part 5: A colour preference experiment at 2000 lx in a real room

Subjects rated the colour preference of a colourful object scene illuminated to 2000 lx by 28 different spectra from a four-channel LED light engine at different object saturation levels and different white points (3200 K, 4200 K, 5000 K and 5600 K). Mean colour preference ratings had a maximum at a moderate saturation level. The lowest correlated colour temperature (3200 K) exhibited lower preference ratings than the three higher correlated colour temperatures. The influence of saturation level was modelled by existing colour rendition measures and by the measure colour quality combining a colour fidelity index and an overall object colour object saturation measure taken from Part 4 of this work.