"Scientific research" Almanac

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  ECONOMIC PROBLEMS OF ENERGY DEVELOPMENT – RENEWABLE ENERGY SOURCES AND ECONOMIC EFFICIENCY

  The scientific research on the topic: „Economic problems of energy development – renewable energy sources and energy efficiency” is of theoretical and practical character. One of the most important aspects of energy production for overcoming the scarcity of raw materials is associated with the use of renewable energy sources. These sources are ... The scientific research on the topic: „Economic problems of energy development – renewable energy sources and energy efficiency” is of theoretical and practical character. One of the most important aspects of energy production for overcoming the scarcity of raw materials is associated with the use of renewable energy sources. These sources are regarded as a key factor for switching to low carbon economies, ensuring security of energy supply, development of new high-tech industries and providing the so-called „Green growth”.

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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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  EFFICIENCY AND ECONOMIC GROWTH OF INDUSTRIAL BUSINESS UNDER CONTEMPORARY CONDITIONS

  The issues related to achieving smart and sustainable growth by efficient and environmentally-friendly use of resources are fundamental in „Europe 2020” strategy and „Bulgaria 2020” National Programme. The relationship „efficiency – economic growth” is interpreted in accordance with the ideas of these programs. The possibilities for analytical ... The issues related to achieving smart and sustainable growth by efficient and environmentally-friendly use of resources are fundamental in „Europe 2020” strategy and „Bulgaria 2020” National Programme. The relationship „efficiency – economic growth” is interpreted in accordance with the ideas of these programs. The possibilities for analytical evaluation of capital and human resources and economic growth are ex-amined. Practical research was carried out on the extent of resource utilization and its impact on economic growth of industrial enterprises from different sectors, which largely illustrate the peculiarities of development of industrial business in the period 2007-2010.