Ключевые слова: солнечный ветер*корональные дыры*интенсивность космических лучей*Форбуш-эффект*
Реферат: The effect of high-speed solar wind streams from low-latitude coronal holes on cosmic ray intensity is studied. The database on Forbush effects created at IZMIRAN, with cosmic ray density and anisotropy calculated by the Global Survey Method (GSM) on the basis of Neutron Monitor network data has been used for the entire 2007. From the analysis of events in 2007 it was found that relationship of the Forbush effect magnitude to the solar wind speed is much weaker than to the magnitude of the interplanetary magnetic field. Best of all the FE magnitude correlates with a \'critical\' rigidity of the CR determined by the magnetic shield created by interaction of the high speed streams from coronal holes with low speed solar wind.
Forecasting Geomagnetic Conditions in near-Earth space
Ключевые слова: центры контроля геомагнитной обстановки*планетарный геомагнитный Ар-индекс*методы прогнозирования Ар-индекса*
Реферат: Geomagnetic conditions in near-Earth space have been a constantly evolving scientific field, especially during the latest years when the dependence of our everyday life on space environment has significantly increased. The scientific community managed to implement centers for the continuous monitoring of the geomagnetic conditions which resulted into short and long term forecasting of the planetary geomagnetic index Ap. In this work, the centers that have been established and are in operational mode in Russia (IZMIRAN), Greece (Athens), Kazakhstan (Almaty) and Bulgaria (Sofia) are presented. The methods that have been used for the forecasting of Ap index are demonstrated and the forecasted results in comparison to the actual Ap measurements are also discussed.
Cosmic rays and thunderstorms at the Tien-Shan mountain station
Автор(ы): Gurevich A. V.*Antonova V. P.*Chubenko A. P.*Karashtin A. N.*Mitko G. G.*Ptitsyn M. O.*Ryabov V. A.*Shepetov A. L.*Shlyugaev Yu. V.*Vildanova L. I.*Zybin K. P.*
Реферат: The necessary condition for the occurrence of runaway avalanche is the existence of high-energy electrons. In the atmosphere, these are the cosmic ray secondary electrons. Therefore the observed effects reflect close relationship between cosmic rays and electrodynamic processesin a thunderstorm atmosphere. The Tien-Shan high-altitude cosmic ray station is a unique site for investigations effects of cosmic rays and thunderstorm discharge. \"Thunderstorm\" detector complex is designed especially for a systematical study of atmospheric discharges by themeans of simultaneous recording of the different kinds of radiation. The presence of a widespread extensive air shower trigger set-up at the Tien-Shan station permits to study the role ofenergetic cosmic ray particles in lightning development. Overview of main results, obtain during last several years at the Tien-Shan are presented. A phenomenological description and theoretical vision of the cosmic rays role in atmosphere processes during thunderstorm are discussed.
Bursts of gamma-rays, electrons and low-energy neutrons during thunderstorms at the Tien-Shan
Автор(ы): Mitko G. G.*Antonova V. P.*Chubenko A. P.*Karashtin A. N.*Ptitsyn M. O.*Ryabov V. A.*Shepetov A. L.*Shlyugaev Yu. V.*Vildanova L. I.*Zybin K. P.*Gurevich A. V.*
Реферат: New data of the last measurement season held at the Tien-Shan complex for investigation gamma-radiation, accelerated electrons and low-energy neutrons during thunderstorms are presented. The flux of gamma-radiation in the energy range of 40 - 1200 keV shows a strict correlation with instantaneous intensity of atmospheric discharge. Its energy spectra measured for the first time with riches statistics and improved resolution typically have an absolute intensity about 50 - 100 quanta*cm{-2}*s{-1}, and demonstrate considerable evolution in the course of discharge. The signals from an avalanche of accelerated electrons have been directly observed inside thunderclouds. A lower energy estimation for these electrons is about 10 MeV. For the first time, during electric discharge moments in thunderstorms, there were found considerable intensity enhancements of the neutron intensity in the range of thermal energies: up to 100 - 200 standard deviations, or 3 - 8 times above the background, so the observed neutron flux reaches the values of (20 - 40)*103 m{-2}*min{-1}.
Forbush-effects and atmospheric pressure dynamics at high-altitude Tien Shan station
Автор(ы): Antonova V. P.*Kryukov S.*
Объем документа:
МРНТИ: 37.15.21
Ключевые слова: динамика атмосферного давления*солнечная активность*циркуляция нижней атмосферы*Форбуш-эффекты*
Реферат: We present atmospheric pressure dynamics studies at the high-altitude Tien Shan station (3340 m above sea level) during 23rd cycle of solar activity after Forbush-effects. It is established that 80 % of Forbush effects with delay 1 - 3 days are accompanied with steady depression of atmospheric pressure irrespective of geomagnetic field conditions. We found that atmospheric pressure dynamics at mountains and ground levels during investigated periods is different. Experimental results are compared with possible mechanisms of influence of sporadic effects of solar activity on circulation of the lower atmosphere.
Геомагнитная сопряженность современных геолого-тектонических структур
Автор(ы): Хачикян Г. Я.*Жакупов Н. С.*Кадырханова Н. Ж.*
Реферат: Проведено тестирование новой идеи, рожденной в эру космических исследований, что землетрясение является элементом глобальной электрической цепи, в рамках которой можно ожидать, что тектонические структуры в северном и южном полушариях Земли могут быть магнитосопряженными. Выявлено, что срединно-океанические хребты южного полушария, расположенные вдоль границы Антарктической литосферной плиты, магнитно сопряжены с зонами сочленения орогенных и платформенных структур в северном полушарии. Наиболее выраженная геомагнитная сопряженность наблюдается между южной границей литосферной плиты Нацка и северной границей литосферных плит Кокос и Карибская.
Опыт проведения площадного мониторинга смещений земной поверхности территории месторождения Тенгиз
Автор(ы): Жантаев Ж. Ш.*Фремд А. Г.*Иванчукова А. В.*Кантемиров Ю. И.*Никифоров С. Э.*
Реферат: Рассмотрены вопросы космического радарного интерферометрического мониторинга вертикальных смещений земной поверхности на примере реализации российско-казахского проекта по определению смещений земной поверхности территории разрабатываемого нефтегазового месторождения Тенгиз.
Studying Grading of Non-Metallic Materials on the Spiral Screen
Реферат: In the article the results of studying of the equipment up-to-date condition and grading bulk construction solids theoretical examining on different fractures especially damp materials of bed, lamellar and stylus forms were obtained. It is shown that operating now plane vibration or drum screens do not satisfy to the process of grading non-metallic materials. The article considers processes of screening bulk material on the spiral vibrating screen. The screen rational parameters, which provide product of the high quality, decreasing of consumed power and increasing of efficiency, were determined. Mathematical model of the spring spiral, a spiral vibrating screen is developed. Let\'s study spring spiral in two positions - static and dynamic. In the result of making static and also dynamic models we got dependences for determining the lateral strain of spiral turns. Pre-condition for making the given model is the condition of complete spiral loading with input bulk material providing rational values of screening efficiency and effectiveness. The obtained mathematical model of springing spiral, spiral vibration screen will allow producing qualitative analysis of work of totally new innovating screen.
The Planetary Vibroexciter with Elliptic Inner Race
Автор(ы): Сурашов Н. Т.*Дудкин М. В.*Елемес Д. Е.*Калиева А. Д.*
Объем документа: С. 229-232
МРНТИ: 55.53.33
Ключевые слова: планетарный вибровозбудитель*эллиптические внутренние кольца*генерация запуска усилия*
Реферат: We present a method determining analysis of workflow of the planetary vibroexciter, allowing by constructing three-dimensional graphs obtained in MathCAD, combine several line graphs in one. Improves the availability the results of theoretical analysis, the influence of the main parameters of the vibroexciter on its dynamic characteristics. The use of a planetary vibroexciter with elliptic inner race gives substantial advantage in generated driving force against an analog vibroexciter, equipped with a round inner race with the same dimensions and initial parameters. Selecting the mode of setting the spider axis of a planetary vibroexciter in one of focal points of elliptic inner race leads to the increase of generated driving force, 2.2 times on abscissa axis and 2.4 times on ordinate axis, against the central position of the spider axis. This proves the effectiveness of the elliptic planetary vibroexciter use. 1.6 times increase of focal length results in directly proportional increase of driving force projection on ordinate axis, and 2.1 times increase of driving force projection on abscissa axis.
Circular Plate- Membrane With Small Deflection and Maximum Sensitivity
Автор(ы): Абдеев Б. М.*Елемес Д. Е.*Сакимов М. А.*
Реферат: Classical hextremum problem to determine the optimum geometrical parameters of a linear-elastic, homogeneous, isotropic circular membrane with a rigid central disk is the static effect of a concentrated force is solved. Ratio of 0.326 found between the inner and outer radius of the membrane plate provides the greatest sensitivity, efficient thickness and minimum materials consumption, which is a consequence of the implementation of the condition of reliability for the safety factor for the down to the limit state of springing element. The energy failure theory of Huber-Hencky-Mises (Huber M.T., Hencky H., Mises R.) is used as the constraint equation. Due to the complexity (transcendence) of the formula target sensitivity function that depends on two controlled variables, the procedure of maximization is performed by search for the direct numerical method. The developed mechanical-mathematical model of the optimization process is based on three well-known conditions proposed by G. Kirchhoff for the thin plate-bending theory. The derived formulas can be used for optimal design of capacitive, inductive and strain measuring force sensory data unit, in which the membrane requires the greatest move, that is, high sensitivity, and the membrane plate is loaded only by the working pressure without experiencing reaction from the mechanism of the device.