А. А. Vorobev, A. L. Penkin, V. S. Smirnov. Methodology for assessing the environmental effect of the useof biofuels [more] [back]

The article discusses the existing methods for estimating exhaust gas emissions from motor vehicles. The existing method from the "Temporary Standard methodology for determining the economic efficiency of environmental protection measures and assessing the economic damage caused to the national economy by environmental pollution" is used as the basis for calculating carbon dioxide emissions, the method given in the order of the Ministry of Natural Resources and Environment "On approval of methods for quantifying greenhouse gas emissions" is used as the basis for calculating carbon dioxide emissions. gases and greenhouse gas uptake". The paper calculates the environmental effect of using biofuels using the example of adding biodiesel to petroleum diesel fuel. The proposed method for calculating the environmental effect makes it possible to estimate the volume of emissions of harmful substances and carbon dioxide depending on the concentration of biofuels mixed with traditional fuels. Keywords: biofuels, biodiesel, mixed fuels, ecology, the use of alternative fuels, calculation methods

S. V. Treskin, E. Yu. Dul`skij, V. A. Kruchek, P. Yu. Ivanov. Analysis of the use of hydraulic vibration dampers in springsuspension structures of railway rolling stock [more] [back]

The article provides an overview of the layout of hydraulic vibration dampers in the spring suspension of rolling stock, their advantages and disadvantages are given. The necessity of using hydraulic vibration dampers is shown not only in the structures of the undercarriage of passenger cars and locomotives, but also in the spring suspension of freight cars. The use of hydraulic vibration dampers makes it possible to minimize the negative impact of oscillatory movements on both the structure of the rolling stock and the health of passengers and locomotive crews, as well as to increase the comfort of their stay. The use of hydraulic dampers in the spring suspension of freight rolling stock can increase the speed of its movement by improving the running qualities of freight cars and the degree of safety of transported goods. Keywords: ctric locomotive,kolling stock, locomotive, ele diesel locomotive, passenger car, fitting platform, spring susp ension, oscillating motion, hydraulic damper, hydraulic damper

O. A. Malafeev, K. Zhang, I. V. Zaitseva, A. V. Garanin. Problems of search and pursuit of unmanned aerial vehiclesusing the game-theoretic approach [more] [back]

The article considers the optimization of the effectiveness of strategies for detecting and capturing four-rotor unmanned aerial vehicles (quadrocopters). The methods used are mathematical modeling, the apparatus of game theory, the Hungarian method of solving the assignment problem, decision theory, the principle of dynamic programming, and the Maple package for solving examples. To fulfill the conditions for solving the problem of optimal assignments, it is necessary and sufficient that it is balanced. This assignment task can be balanced by entering the required number of dummy boats or fleeing ones. After that, it is possible to formulate and solve the dual problem of optimal assignments. The resulting game can be solved by any method of solving matrix games. In this way, it is possible to define a policy of pursuit and search between unmanned aerial vehicles. Keywords: game theory, quadcopter, model, cooperative game theory, Simulink MPC modeling