Wind power potential of the volga federal district and rationale of the use of low-power wind-driven power-plants

Russia there was developed an energy strategy for the development of the country until 2030, where it has also paid attention to the development of wind power engineering. This paper describes the wind conditions in the vast territory of the Volga Federal District and considers the possibility of using wind energy with a uniform measurement material, as well as evaluates the wind power potential of the Volga Federal District. The paper discusses the wind regime in the territory of the Volga Federal District using time series of mean monthly wind speeds at 183 meteorological stations in the period 1966-2009. There were analyzed the mean values, measures of variability, anomalies of wind speeds, linear trends, correlations between points, etc. We have revealed an inhomogeneous distribution of the mean monthly wind speeds (MMWS) in the territory, and the general trend of lowering wind flows. The wind power potential of the Volga Federal District in the atmosphere layer of 10-150 m was assessed. The analysis led to the conclusion that one of the priority directions of development of wind power in the near future will be a stand-alone use of small and medium-sized wind-driven power plants in remote areas where the population density is low, there is no large electrical networks, and it is appropriate to use wind-powered generating plants for energy supply purposes

Equilibrium tasks in geography

© 2015, Mediterranean Center of Social and Educational Research. All rights reserved. While solving the task of analysis and predicting behaviour of any complex systems one of the main approach is the defining the sufficient stable state of such a system according to the indicators emphasized as the basic ones

Transformation of organic matter of rocks from domanik deposits in hydrothermal and pyrolytic processes

© SGEM 2017. All Rights Reserved. The objects of the study were samples of Domanik rock from Upper Devonian siliceous-carbonate and carbonate sediments of the Romashkinо oil field, which occurs in the central part of the South Tatarian arch in Tatarstan. The composition of organic matter and mineral rock components and bitumoids extracted from them was studied by thermal analysis, X-ray diffraction analysis, SARA analysis and gas chromatography. Significant differences in the mineralogical composition and content of organic matter are found in samples after their hydrothermal treatment at a temperature of 350°C in the steam medium at the carbon dioxide. Based on the example of these rock samples, pyrolytic experiments were conducted to simulate the processes of conversion of kerogen to free micronized oil at temperatures of 350 and 600°C in a hydrogen medium in a flow system. The content of Mn 2+ , SO 3 - , SO 2 - ions in the rock, as well as ions of vanadyl (VO 2+ ) and free radicals (R*) in the pyrolysis products were evaluated using Xband electron paramagnetic resonance (EPR) spectroscopy at frequency of 9.43 GHz. The most significant changes associated with an increase in the concentration of free radicals were observed at 350°C. A new free organic radical C350 was registered In the sample of siliceous-carbonate sediments and a free organic radical C 600 – in carbonate sample, which indicate that the studied rocks did not fully realize their potential in natural hydrocarbon generation processes

Bjorken sum rule with analytic coupling at low Q2 values

The experimental data obtained for the polarized Bjorken sum rule \Gamma^{(p-n)}_1(Q^2) for small values of Q2 are approximated by the predictions obtained in the framework of analytic QCD up to the 5th order perturbation theory, whose coupling constant does not contain the Landau pole. We found an excellent agreement between the experimental data and the predictions of analytic QCD, as well as a strong difference between these data and the results obtained in the framework of standard QCD.Comment: 9 pages, 1 figur

Bjorken sum rule with analytic coupling

We found good agreement between the experimental data obtained for the polarized Bjorken sum rule and the predictions of analytic QCD, as well as a strong difference between these data and the results obtained in the framework of perturbative QCD. To satisfy the limit of photoproduction and take into account Gerasimov-Drell-Hearn and Burkhardt-Cottingham sum rules, we develope new representation of the perturbative part of the polarized Bjorken sum rule.Comment: 17 pages, 6 figure

Predictive age-groups modeling in a long-term perspective

© 2016 Taylor & Francis Group, London.In the current period, the demographic development of the Republic of Tatarstan is a very topical problem in calculating the rate of population growth, forecasting its size, and composition. Currently, the number of people planning specific age groups in the preparation of the federal and regional budgets is based on data analysis of state statistical reports on the number and mortality. However, the method of advancing age in our opinion is more accurate, allowing arguments to plan and predict future demographic situation. In this paper, this method is used to predict the number of pensioners in the Republic of Tatarstan

EPR study of hydrocarbon generation potential of organic-rich domanik rocks

© Kazan Federal University (KFU). The objects of investigation were samples of domanik formation rocks of Berezovskaya area of Romashkinskoye oil field. Content of Mn 2+ , SO 3 − , SO 2 − ions, vanadyl-ions and free radicals has been estimated with the X-band (9.43 GHz) electron paramagnetic resonance (EPR) spectroscopy. Composition of rock and extracted from it bitumen has been studied with methods of thermal analysis, X-ray-structural analysis and gas chromatography. Significant differences in mineralogical composition and content of organic matter were revealed in samples taken from adjacent intervals. Pyrolytic experiments have been conducted to simulate kerogen maturation and petroleum generation. The increasing number of free radicals was registered in all samples after pyrolysis in a hydrogen atmosphere at 350°C. A new organic free radical C350 was registered after pyrolysis. It is suggested that domanik source rocks have not fully realized their hydrocarbon generation potential