Autor: Romanov, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Hydrogeological monitoring of karst activity based on regime observations in the territory of karst lakes
Autorzy:: Kuzichkin, Oleg R.
Romanov, Roman V.
Dorofeev, Nikolay V.
Vasilyev, Gleb S.
Grecheneva, Anastasia V.
Powiązania:: https://bibliotekanauki.pl/articles/1844370.pdf
Data publikacji:: 2021
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: data processing algorithm
geodynamics
geoelectric facility
hydrogeological monitoring
karst lake
phase-measuring method
Opis:: This article shows that the most sensitive indicator of local and regional karst activity in territories of apparent karst processes is the behaviour of karst lakes. The authors propose a hydrogeological monitoring methodology for the karst process based on the phase-measuring geoelectric control method in the coastal zone of karst lakes. The geoelectric current control of hydrogeological changes in the medium at local levels uses a multi-frequency vertical electric sounding combined with a phase-measuring method of registering the geoelectric signal. These proven methods permit to distinguish variations of spatial parameters and the electric conductivity of several layers at a time. Moreover, they significantly increase the noise resistance and sensitivity of the measuring system. An adaptive algorithm function of the measuring complex for geoelectric monitoring of karst lakes’ coastal zones was developed to control the operation of facilities and data collection systems. Based on an example of a lake where karst processes are active, the key zones of hydrogeological control were identified depending on karst manifestations. The research confirmed the possibility of local and regional monitoring of the development and forecasting of destructive karst-suffosion processes based on hydrogeological regime observations of karst lakes.
Źródło:: Journal of Water and Land Development; 2021, 48; 130-140
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The organisation of control over non-centralized water supply under the risk of groundwater dynamics disturbance in karst areas
Autorzy:: Kuzichkin, Oleg R.
Romanov, Roman V.
Dorofeev, Nikolay V.
Grecheneva, Anastasia V.
Vasilyev, Gleb S.
Powiązania:: https://bibliotekanauki.pl/articles/1844418.pdf
Data publikacji:: 2020
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: electrical express-monitoring method
hydrogeological control
karst
non-centralised water supply
water quality
Opis:: The use of non-centralised water supply in remote settlements is currently the only possible option. Monitoring the water quality of such supply sources is a complicated task in such areas, especially when there are active karst processes and difficult groundwater conditions. The application of deterministic analytical models of water supply under the risk of disturbance to groundwater dynamics is not efficient. Significant quantitative and even qualitative changes in groundwater conditions may take place between the calculated points, and the underestimation of these changes in expectation-driven computation models may result in serious geoecological issues. This research studied and justifies the use of adaptive dynamic hydrogeological control in an area of non-centralised water supply based on the identification of key zones of geodynamic karst monitoring and the electrical express-monitoring of water resources. The identification of key zones is based on an integrated analysis of available groundwater information that describes changes in groundwater hydrodynamic conditions at the time of the karst forecast. The development of karst-suffusion processes is accompanied by more intense dynamic changes in local areas of geologic environment compared to the general variation in intensity. Information about the occurrence of destructive groundwater processes by means of selective geodynamic monitoring may thus be obtained much earlier than with environmental geodynamics monitoring as a whole. The experimental hydrogeological control of an area of non-centralised water supply was conducted on the right bank of the Oka River in Nizhny Novgorod region, a locality with an active manifestation of karst processes. Structure and algorithms of space-time processing of hydrogeological control data developed by authors have been used. The approach based on multifrequency vertical electrical sounding (MFVES) method has shown good correspondence with direct borehole observation when measuring depth of the first aquifer. Zones of unsafe water use have been revealed. The results demonstrated the effectiveness of the proposed method and the need for further regular observations of destructive groundwater processes by means of selective hydrogeodynamic monitoring.
Źródło:: Journal of Water and Land Development; 2020, 47; 113-124
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The brushless permanent magnet micromotor in the smallest drive system
Bezszczotkowy mikrosilnik z magnesami trwałymi w najmniejszym układzie napędowym
Autorzy:: Nesterin, V.
Nesterina, A.
Romanov, R.
Scherbakov, A.
Junin, S.
Powiązania:: https://bibliotekanauki.pl/articles/159188.pdf
Data publikacji:: 2009
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
Tematy:: silnik bezszczotkowy
silnik z magnesami trwałymi
MEMS
analiza matematyczna
brushles motors
permanent magnet motors
mathematical analysis
Opis:: The article presents the results of the work of contactless fractional-horsepower motor (micromotor) with excitation from constant magnets, which can be used in MEMS (Micro-Electro-Mechanical Systems). These MEMS are used in Medicine, flaw detection, military equipment and in microrobots of different usage. Also article presents the results of mathematics Simulation of magnetic field in work zone of micromotor and the analysis of the basic datas and characteristics of experimental Sample with electronic device System control. The Sample of micromotor is made in the form of glass body with the usage of technology of making slim multi capillary glass tubes. The rotor of micromotor is made in the form cylinderic constant magnet from FeNdBr material. Basic datas: lengt – 6 mm; outside diameter - 2,5 mm; the number of phase - 3; rotation rates - 9600 rpm; stress (voltage, tension) - 0,5 V. Electronic unit (block) with microprocessor device realizes the work of micromotor in sensorless regime and allows to control the rotation speed in the rotation speed in the range 1:1000. The results of theoretical research agree with experimental datas, received in the process of experimental micromotor Sample.
Artykuł przedstawia wyniki pracy dotyczącej bezstykowego silnika o mocy ułamkowej (mikrosilnika) ze wzbudzeniem od magnesów trwałych, który może być użyty w MEMS (Micro-Electro-Mechanical-Systems). MEMSy stosowane są w medycynie, detekcji wad, wyposażeniu wojskowym i różnych mikrorobotach. Praca przedstawia również wyniki matematycznej symulacji pola magnetycznego w strefie pracy mikrosilnika i analizę podstawowych danych i charakterystyk eksperymentalnego egzemplarza próbnego ze sterowaniem elektronicznym. Próbny egzemplarz jest wykonany w postaci korpusu ze szkła z użyciem technologii cienkich, multi - kapilarnych rurek szklanych. Wirnik mikrosilnika jest wykonany w postaci cylindrycznego magnesu trwałego wykonanego z FeNdBr. Podstawowe dane: długość – 6 mm, średnica zewnętrzna - 2,5 mm, liczba faz - 3, prędkość obrotowa - 9600 obr/min, napięcie - 0,5 V. Jednostka elektroniczna (blok) z mikroprocesorem realizuje pracę mikrosilnika w reżymie bezczujnikowym i pozwala sterować prędkość obrotową w zakresie 1:1000. Wyniki badań teoretycznych zgadzają się z danymi doświadczalnymi uzyskanymi w pracy eksperymentalnej mikrosilnika próbnego.
Źródło:: Prace Instytutu Elektrotechniki; 2009, 240; 231-240
0032-6216
Pojawia się w:: Prace Instytutu Elektrotechniki
Dostawca treści:: Biblioteka Nauki

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