Improving Control Efficiency in Buffering Systems Using Anticipatory Indicators for Demand Forecasting

Optimization of the stock management process is associated with the search for a forecasting model, a method for generation of a forecasting time series, a model of logistic operation, determining a reasonable level of reserve stocks and establishing the optimization criterion.Successful solution to the optimization problem in general can be achieved only if the whole complex of local management problems is successfully solved. In this case, the method of generation of a cointegrated time series of demand forecasting is the central element of the technology of optimal stocks management. This relates to the fact that probabilistic nature of demand is the main factor reducing efficiency of management in systems of this class.It was shown that the proposed method for improving management efficiency can be used in any economic system due to the possibility of construction of a single logistic operation model.The proposed approach is based on formation of a time series specifically designed to solve the problem of forecasting the demand in stocks buffering systems. Such a series contains both information on sales volumes and data related to consumer demand.Since consumer activity is ahead of the process of physical consumption of products, it becomes possible to use anticipatory markers in forecasting problems.The study of operational processes using a verified indicator of efficiency has confirmed the hypothesis of presence of anticipatory markers within the framework of the formed forecast time series.It has been established that the maximum management efficiency can be achieved in the case of a lower construction accuracy of the forecast model. This is due to the fact that the logistic operation model takes into account the costs of movement of products and their valuation at the operation input and output

Determiantion of Energy Characteristics of Material Destruction in the Crushing Chamber of the Vibration Crusher

The crushing equipment is characterized by a significant energy-consuming system during the crushing workflow. The current trend in the development of such processes puts forward requirements for the development of new or improvement of existing energy-saving equipment. The essence of the solution to the problem in this work is determined by using resonant modes, which are inherently the most effective. The practical implementation of the resonance mode has been achieved taking into account the conditions for the interaction of the resonant vibration crusher with the material at the stages of its destruction. The degree of the stress-strain state of the material is taken into account, which was a prerequisite for identifying the potential for the development of a vibration load. Composed equations of motion based on a substantiated discrete-continuous model of a vibration crusher and processing material. An approach is applied to determine the stepwise destruction of the material with the determination of the required degree of energy. This methodological approach made it possible to reveal the nature of the process of material destruction, where energy costs at the stages of crack formation, their development and final destruction are taken into account. It was revealed that the greatest energy consumption during the operation of crushers goes into the kinetic energy of the crushing plates and the potential energy of deformation of the springs. The proposed model is common for any design of a vibration machine and its operating modes. The stable resonance mode has made it possible to significantly reduce the energy consumption for the course of the technological process of material grinding. The results obtained are used to improve the calculation methods for vibratory jaw and cone crushers that implement the corresponding energy-saving stable zones of the working process

Algorithm for Selecting the Winning Strategies in the Processes of Managing the State of the System "Supplier – Consumer" in the Presence of Aggressive Competitor

The issue examined in this work relates to the search for an optimal pricing strategy by an enterprise-supplier in case it faces a new competitor that offers products at a lower price. The emergence of such a problem necessitates looking for a rational way to reduce its selling price, in order to prevent losing in an aggressive competitive environment, formed by new players entering the market with proposals that are obviously better. To resolve this problem, we have developed an algorithm for selecting the winning strategies based on the estimation of strategic capabilities of a competitor under conditions of uncertainty.It has been proposed, in order to assess the cost of a product in the system "supplier-consumer", to apply the concept of the l- level scale. It is shown that, given such a representation, it becomes possible to employ a dimensionless estimation of product pricing, regardless of its type or natural cash value. For a formalized description of relations between an enterprise- supplier and a competing company, it is proposed to use the theory of strategic games, in which a game matrix is built based on universal regression equations. A feature of the proposed solutions is that the value of winning in the game matrix is defined by solving an optimization problem based on the regression equation that describes the impact of transportation costs, profit, and a value-added tax (VAT) on the price of the game. It has been established that, given such a description, the game that is played has a saddle point with the net price of the game z=–0.5. Based on mathematical modelling, it was established that the selection of a supplier company is limited by strategies at which own profit must be close to the average or the minimally possible value.We have constructed a predictive model for strategic opportunities of a competitor in the system "supplier-consumer", representing a universal regression equation. Based on it, an adjustment of numerical indicators for the components in product pricing can be made. It is shown that such an adjustment allows the existence of multiple alternatives, neutralizing competitor's advantages. We have substantiated constraints for the solutions derived, related to two factors: an assumption about the accuracy of determining the pricing components of a competitor, and the presence of taxation specificity in International cargo transportation

Devising A Technique to Improve the Efficiency of CdS/CdTe/Cu/Au Solar Cells Intended for Use as A Backup Power Source for the Systems of Safety and Control of Objects

This paper reports a study into the impact of cadmium telluride layer thickness on the effectiveness of the CdS/CdTe/Cu/Au film solar cells. The physical mechanisms have been investigated of charge transfer in the CdS/CdTe/Cu/Au solar cells, which are intended for use as a backup power source for the systems of safety and control of objects. This is important because, despite the growing popularity of solar cell application, the effectiveness of laboratory samples differs greatly from the theoretical maximum. Thus, it has been established that the optimum thickness of the base layer of film CdS/CdTe/Cu/Au SCs is 4 µm. When the thickness of the cadmium telluride layer is reduced, the effectiveness of such an assembly decreases. The decrease in efficiency occurs as a result of reducing the shunting electric resistance, increasing the density of a diode saturation current, as well as consistent electric resistance. With the increase in the thickness of the telluride layer exceeding 4 µm, there is also a decrease in the efficiency of a solar cell due to the reduced shunting resistance and the increased serial electric resistance. The deterioration of the specified light diode characteristics of CdS/CdTe/Cu/Au SCs, which occurs when the thickness of the base layer is reduced by more than 4 µm, is due to the diffusion of copper from the contact to the area of the separating barrier. The deterioration of light diode characteristics when increasing the thickness of the base layer of cadmium telluride is associated with a decrease in the positive effects of "chloride" treatment. The examined physical charge transfer mechanisms in the CdS/CdTe/Cu/Au solar cells have made it possible to establish the height of the rear potential barrier. In the samples studied, the height of the rear potential barrier is 0.3 eV. The existence of such a barrier gives rise to the thermal-emission mechanism of charge transfer in such solar cells when applying a direct offset exceeding 1