ASSESSMENT OF CYCLICAL AND STOCHASTIC WIND FLOW TO ENSURE POWER SYSTEM RELIABILITY

This article highlights current issues related to the problem of variability of wind power generation, which is becoming increasingly important as wind power’s contribution to the overall energy balance of many countries grows. Various aspects of wind flow volatility, including its random and deterministic components, are considered. The random component is associated with unpredictable changes in wind speed and direction, while the deterministic component is due to known patterns, such as daily and seasonal variations. The article proposes different methods for levelling the stochasticity of wind power flows. This is important for the stability and reliability of the power system, as it reduces the likelihood blackouts and ensures a more even distribution of load. The article also gives examples of the economic and environmental impact of using the proposed methods

Diagrams of the formation of In2S3 and In 2Se3 films on vitroceramic upon precipitation, according to potentiometric titration

Boundary conditions and ranges of the formation of indium(III) sulfide and selenide upon precipitation by thiocarbamide and selenocarbamide are determined. Potentiometric titration of indium chloride (InCl3) in the concentration range of 0.0001 to 0.100 mol/L by a solution of sodium hydroxide is performed. It is found that the following pH ranges are optimal for In 2S3 and In2Se3 film precipitation: from 3.0 to 4.5 and from 9.0 to 14.0. Indium selenide layers 100 to 300 nm thick are prepared on vitroceramic by hydrochemcial precipitation. © 2013 Pleiades Publishing, Ltd

确保电力系统可靠性的风流周期性和随机性评估

This article highlights current issues related to the problem of variability of wind power generation, which is becoming increasingly important as wind power’s contribution to the overall energy balance of many countries grows. Various aspects of wind flow volatility, including its random and deterministic components, are considered. The random component is associated with unpredictable changes in wind speed and direction, while the deterministic component is due to known patterns, such as daily and seasonal variations. The article proposes different methods for levelling the stochasticity of wind power flows. This is important for the stability and reliability of the power system, as it reduces the likelihood blackouts and ensures a more even distribution of load. The article also gives examples of the economic and environmental impact of using the proposed methods.Статья освещает актуальные вопросы, связанные с проблемой непостоянства выработки электроэнергии ветровых электростанций, что становится все более важным с учетом растущего вклада ветроэнергетики в общий энергобаланс многих стран. Рассматриваются различные аспекты волатильности ветрового потока, включая его случайную и детерминированную составляющие. Случайная составляющая связана с непредсказуемыми изменениями скорости и направления ветра, в то время как детерминированная составляющая обусловлена известными закономерностями, такими как суточные и сезонные колебания. В статье предложены различные методы нивелирования стохастичности энергии ветровых потоков. Это важно для обеспечения стабильности и надежности энергосистемы, так как снижает вероятность перебоев в подаче электроэнергии, обеспечивая более равномерное распределение нагрузки. В статье также приводятся примеры экономических и экологических эффектов использования предложенных методов.本文章重点介绍了当前与风电场发电变异性问题有关的问题。鉴于风能在许多国家的总体能源结构中所占比例越来越大，这一点正变得越来越重要。作者考虑了风流波动的各个方面，包括其随机和确定成分。随机成分是由于风速和风向的不可预测变化造成的，而确定成分则是由于已知模式造成的，如昼夜和季节变化。本文章提出了来平抑风流能量的随机性的多种方法。这对确保电力系统的稳定性和可靠性非常重要，因为通过提供更均匀的负荷分配，降低了停电的可能性。本文章还说明了使用拟议方法的经济和环境影响例子

On the Question of Development of the CSTO Model Law «On the State Secret»

Urgent aspects of a state and development of the legislation on the state secret in the context of search of approaches to its harmonization within the CSTO are discussed

Magnetic and spectral properties of multi-sublattice oxides SrY2O4:Er3+ and SrEr2O4

SrEr2O4 is a geometrically frustrated magnet which demonstrates rather unusual properties at low temperatures including a coexistence of long- and short-range magnetic order, characterized by two different propagation vectors. In the present work, the effects of crystal fields (CF) in this compound containing four magnetically inequivalent erbium sublattices are investigated experimentally and theoretically. We combine the measurements of the CF levels of the Er3+ ions made on a powder sample of SrEr2O4 using neutron spectroscopy with site-selective optical and electron paramagnetic resonance measurements performed on single crystal samples of the lightly Er-doped nonmagnetic analogue, SrY2O4. Two sets of CF parameters corresponding to the Er3+ ions at the crystallographically inequivalent lattice sites are derived which fit all the available experimental data well, including the magnetization and dc susceptibility data for both lightly doped and concentrated samples.Comment: 14 pages, 9 figure

The Republic of Armenia: on the Way to the Information Society

The article is devoted to the issues of promotion of the Republic of Armenia on the way of building information society. The national legislation in the sphere of information freedoms and electronic communications is characterized, the peculiarities of legal regulation and administration, management of the national segment of the Internet are discussed

Open-hole well completion analysis using borehole acoustic scanner and an optical borehole televiewer

This paper presents a method for an open-hole well completion analysis using a Borehole Acoustic Scanner and a Borehole Video Imager. Acoustic ultrasonic scanning has been used for lithological well profile analysis, cavernous and fractured-cavernous zones identification in a testing well. The video imager provides important information about the well geological structure and fractured zones. It is shown that the combined interpretation of the borehole acoustic scanner data and video imager data provides complete geological information about the testing well. Corresponding approach could be useful for developing acoustic scanning template database

Non-Thermal Absorption and Quantum Efficiency of SINIS Bolometer

We study mechanisms of absorption in two essentially different types of superconductor-insulator-normal metal-insulator-superconductor (SINIS) bolometers with absorber directly placed on Si wafer and with absorber suspended above the substrate. The figure of merit for quantum photon absorption is quantum efficiency equal to the number of detected electrons for one photon. The efficiency of absorption is dramatically dependent on phonon losses to substrate and electrodes, and electron energy losses to electrodes through tunnel junctions. The maximum quantum efficiency can approach n = hf/kT = 160 at f = 350 GHz T = 0.1 K, and current responsivity dI/dP = e/kT in quantum gain bolometer case, contrary to photon counter mode with quantum efficiency of n = 1 and responsivity dI/dP = e/hf. In experiments, we approach intrinsic quantum efficiency up to n = 80 electrons per photon in bolometer with suspended absorber, contrary to quantum efficiency of about one for absorber on the substrate. In the case of suspended Cu and Pd absorber, Kapitsa resistance protect from power leak to Al electrodes