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In recent years, the use of renewable energy carriers has been considerably increasing. The trend is associated mainly with the gradual depletion of reserves of fossil fuels and with problems of the impact of conventional power engineering on the environment, mostly connected with emissions of greenhouse gases. The paper presents statistical data on electricity generation from renewable energy sources...
The purpose of this paper is to present the LPV affine modeling of a Wind Energy Conversion System driven DFIG. It also deals with the analysis and the simulation of the established model. For that, starting from the system's electrical equations, we demonstrate the obtaining of the uncertain state space model of the DFIG. Then, we define a method that allows giving directly the variation range of...
This paper addresses the problem of discretization for uncertain linear systems with time-delay, uncertainty being of type bounded norm. Model is uncertain when the system modeling errors in the operating range controlled by the command are poorly known. A new approximated discretization method and digital design for control systems with time-delay are proposed. Numerical examples are given to demonstrate...
C2C is an important part of E-commerce, even in the economic crisis it is still rapidly growing. However, compared with the traditional economy, the research on the network economy is still in its infancy. So this paper aims to C2C market to find consumer behavior rules. Differential pricing exists in C2C market, too. But the main reason is the uncertainty of product quality. Because different kinds...
The evaluation of economic efficiency of industrial enterprises is a comprehensive uncertainty system problem. Based on the theory of set pair analysis, stochastic simulation of triangular fuzzy numbers, a novel evaluation method for the economic efficiency of industrial enterprises was investigated in this paper. A concept of multi-element connection number of the set pair, which was consisted of...
For application researches of the detection for the gas signal source, a method for orientation estimation of the gas signal source in the two-dimensional space and its algorithm are presented in the paper. In the method, a mode of dual-line gas sensor array is applied to sample the signals of the gas concentration in real time, and the time delay estimation, an approach of the signal processing,...
This paper deals with the identification and robust control of a biological wastewater treatment process. The identification has been done on the basis of the minimization of an Euclidian-distance criterion, with respect to the model coefficients. The robust control of the biological wastewater treatment process has been accomplished through QFT (quantitative feedback theory) techniques. To this end...
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