Voronezh State Academy of Forestry Engeneering
Author list of organization
List of articles written by the authors of the organization
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INFLUENCE OF ROTATION FREQUENCY OF CHAIN WORKING BODY ON ITS OPERATIONAL EFFICIENCY
Description
Based on imitating modeling, the analysis of effi-ciency of a chain brush cutter with working body of a new design is carried out. Influence of frequency of rotation of the worker body on indicators of quality of removal of young growth and power expenses is investigated
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INFLUENCE OF ROTATION FREQUENCY OF CHAIN WORKING BODY ON ITS OPERATIONAL EFFICIENCY
Description
Based on imitating modeling the analysis of effi-ciency of a chain brush cutter with working body of a new design is carried out. Influence of frequency of rotation of the work body on indicators of quality of removal of young growth and power expenses is investigated
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TOOLS FOR OPTIMIZING PRODUCTION MANAGEMENT TAKING INTO ACCOUNT PRICING MODELS
Description
The state of any economic system depends on the values of its parameters, both in the current period and at previous times. Therefore, in the process of optimization of production management, it is necessary to take into account this feature of the development of the systems under consideration. The most important task of economic research is the establishment of an equilibrium price. The most suitable hysteresis converters for solving this problem, the formal description of which is based on their operator interpretation. However, at present, when analyzing the functions of supply and demand, a cobweb-like model and its analogues are used, as a rule. This article discusses the unresolved problem of optimizing production under conditions of hysteresis pricing and competition. Taking into account that their mathematical modeling is the main method of analyzing economic systems with hysteresis properties, different pricing models (discrete and continuous) are considered in the article, as well as economic and mathematical tools for optimizing production activity under hysteresis pricing conditions. The developed models can be used to increase the adequacy of the formal mathematical description of the corresponding systems, which is the basis for more accurate forecasts of their development. In the conditions of hysteresis pricing, production optimization algorithms will allow to create optimal (in terms of achieving maximum profit) price and production strategies for the development of economic systems
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RESEARCHING OF COMPLETE OBSERVABILITY OF TIME – VARYING PERTURBED DYNAMICAL SYSTEM
Description
The article is devoted to the researching of complete observability of time-varying perturbed differential-algebraic system. The method of cascade splitting of the original space to the subspace is used. The formula for finding the state vector is derived. The relations between input and output functions are obtained
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Description
Mathematical model of the slewing mechanism with additional damper is given in the article
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01.00.00 Physical-mathematical sciences
Description
The article presents a mathematical model of the ion transport across phase boundary exchange membrane / solution. The border is considered as an object in space, endowed with all the physical and chemical properties that are inherent physical and chemical phases. It is regarded as a special physical and chemical environment, having a distributed exchange capacity in which there is space charge dissociation of water molecules. The size of this object is estimated in the range of 1-300 nm. The surface morphology of industrial membrane type MK-40, МA-41 and МA-41P was investigated experimentally by scanning electron microscopy (REM). There was analyzed the amplitude of average surface roughness. In this article, the reaction layer is modeled as a region that forms as a relief morphology of the membrane. Membrane properties are due to the properties of the solution and the properties of the membrane. To determine the dependence of Q(x) is proposed procedure for assessing the proportion of solid phase in the total volume of which can be seen in the vertical cross section microprofile on the membrane surface line. Height multivendors determine the reaction layer zone on frame of model. Influence of surface morphology on the V-A characteristics and the sizes of the convective instability of cation-exchange membrane evaluated numerically simulating the hydrodynamic flow conditions using a solution of the Navier-Stokes equations. The transfer of a strong electrolyte such as NaCl ions through the thin layer of the reaction layer is considered. The place of nanomodel in the structure of a three-layer membrane system is showed. The distribution of the concentration of ions in the system, the charge density distribution and the dependence of the integrate charge with extent nanolayer is present. How to change the shape of the space charge and its integral value with one is investigated
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THE MATHEMATICAL MODEL OF ECOLOGICAL SITUATION ON THE RICE IRRIGATION SYSTEM
06.00.00 Agricultural sciences
Description
Solving of problems of the influence of irrigation on ecological situation and creation of optimum land-reclamation conditions are impassible without using of the mathematical modeling methods. The work provides the idea of solving of the land-reclamations problems with the using of systematic-cognitive analysis.
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Description
The influence of single failures in the work of digital devices, and the generalized criterion for the reliability of integrated circuits are observed. The resulting criterion is imposed on specific chips that are used in practice
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Description
The optimization of constructive parameters of chain brush cutter with chopping elements has been performed. The optimal rotating speed of chain reel, speed of brush cutter and clearance between chain reel and surface has been found
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Description
The stability of strongly basic anion-exchange membranes MA-41-2P (JSC "Schekino-Nitrogen", Russia) and AMX (Tokuyama Soda, Japan) under intensive current regimes was investigated in the current study. The process of water molecules dissociation at current densities above the limiting one in 0.01 M sodium chloride solution was studied in detail. The length of the electroconvective instability at the membrane / solution interface at currents exceeding the limiting current was measured by laser interferometry
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