"Scientific research" Almanac

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  EQUILIBRIUM IN STOCHASTIC OPTIMIZATION MODELS WITH ECONOMIC APPLICATIONS

  The subject of this work is the application of a linear quadratic model which is a result of the stochastic modeling process in the economic field. A dynamic economic process is modeled, which occurs in conditions described by a stochastic differential equation. The dynamics of the process is subject to jump-like changes. Such systems are known as ... The subject of this work is the application of a linear quadratic model which is a result of the stochastic modeling process in the economic field. A dynamic economic process is modeled, which occurs in conditions described by a stochastic differential equation. The dynamics of the process is subject to jump-like changes. Such systems are known as Markov jump linear systems. The target in the observed process is modeled through a functional which has to be minimized. The result is a linear quadratic stochastic model. The equilibrium search model is related to the numerical solution of a system of generalized discrete-time algebraic Riccati equations. Methods for finding the maximal solution to a system of discrete-time algebraic Riccati equations are investigated. Moreover, new methods and algorithms for computing of this maximal solution are proposed. The numerical characteristics of algorithms are analyzed in special cases of negative definite weighting matrices and indefinite weighting ones. Conclusions are derived of the applicability and efficiency of the proposed methods.

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  CHALLENGES FOR BULGARIA'S AGRICULTURAL SECTOR IN THE SECOND DECADE OF THE XXI CENTURY IN THE CONTEXT OF THE EU COMMON AGRICULTURAL POLICY

  Òhe EU Common Agricultural Policy focuses on efficient and sustainable agriculture. The growing challenges facing agriculture in Europe (including Bulgaria) necessitate that it is continually reformed so that it can comply with society’s higher demands for healthy food, preserving rural areas, ensuring high quality products and maintaining ... Òhe EU Common Agricultural Policy focuses on efficient and sustainable agriculture. The growing challenges facing agriculture in Europe (including Bulgaria) necessitate that it is continually reformed so that it can comply with society’s higher demands for healthy food, preserving rural areas, ensuring high quality products and maintaining farmers’ incomes. „The European model of agriculture” aims to create sustainable agricultural practices, to ensure the overall market orientation of agriculture and to enable farmers to benefit maximally from the market abilities to deliver products demanded by consumers.

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  RAW MATERIAL EXTRACTION AND ECOLOGIZATION OF THE MINING INDUSTRY

  Under the current economic conditions industrial production ecologization is important for solving diverse problems, new and unfamiliar to the economy. The scientific research entitled: „Raw material extraction and ecologization of the mining industry” is of theoretical-applied orientation. It is relevant to the envi-ronmental problems of mining ... Under the current economic conditions industrial production ecologization is important for solving diverse problems, new and unfamiliar to the economy. The scientific research entitled: „Raw material extraction and ecologization of the mining industry” is of theoretical-applied orientation. It is relevant to the envi-ronmental problems of mining industry and environment preservation and repro-duction. The ecologization of mining industry provides quality and ñompetitiveness of finished products on the domestic and international markets; facilitates technical cooperation between stakeholders; man in his activities and the environment are protected from the harmful effects of the applied technologies and processes.