Pulse Supply Source of Electrical Filters

2020 ◽  
Vol 53 (6) ◽  
pp. 745-750
Author(s):  
A. V. Shcherbakov
Keyword(s):  
Vestnik MEI ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 86-92
Author(s):  
Nikita M. Vakhmyanin ◽  
◽  
Aleksey V. Shcherbakov ◽  
Daria A. Gaponova ◽  
◽  
...  

2012 ◽  
Vol 4 (5) ◽  
pp. 974
Author(s):  
Ricardo Augusto Pessôa Braga

A universalização do abastecimento de água no Brasil ainda é um desafio que se busca suplantar, sobretudo em relação ao atendimento a populações rurais difusas, onde os sistemas convencionais não respondem às demandas das famílias de agricultores dispersas. Nesse contexto, as nascentes de água podem contribuir como solução alternativa para o abastecimento doméstico, por se encontrarem próximas ao consumo e sob o controle do usuário Isto é evidenciado no estudo das nascentes situadas no Assentamento Serra Grande, no município de Vitória de Santo Antão, Zona da Mata de Pernambuco. Foram identificadas, cadastradas e selecionadas nascentes perenes, para caracterização da qualidade e vazão das águas, objetivando avaliá-las para usos múltiplos, com prioridade ao abastecimento doméstico. Evidenciou-se que a vazão, mesmo em períodos de estiagem, possui potencial de atender às necessidades básicas dos agricultores, para beber, preparo de alimentos, banho, lavagem de utensílios e roupas e descarga em sanitários. Quanto à qualidade para uso doméstico, em geral a água atende aos limites sanitários, embora em alguns casos a presença de Escherichia coli exija recuperação da nascente e cloração cuidadosa da água. Pelos resultados, a produção de água em nascentes situadas em solos e clima predominantes na Zona da Mata do Nordeste brasileiro, permite atender às necessidades básicas de abastecimento doméstico de agricultores familiares isolados ou em pequenas vilas rurais, sendo uma alternativa aos sistemas convencionais de abastecimento, já identificada pelo governo federal em seus recentes planos de abastecimento de populações rurais difusas. Palavras-chave: recursos hídricos; gestão ambiental; desenvolvimento rural  The Springs as Supply Source of Rural Diffuse Population  ABSTRACTThe universalization of the water supply in Brazil is still a challenge that it seeks to be supplant, especially in relation to the service to rural diffuse population, where conventional systems do not respond to the demands of farming families dispersed. In this context, the water springs may contribute as a workaround for domestic supply, because they are close to consumption and under user control. This is evidenced in the study of springs located at Settlement Serra Grande, located in the city of Vitória de Santo Antão, Zona da Mata de Pernambuco. It has been identified, registered and selected perennial springs, to characterize the quality and water flow, aiming to evaluate them for multiple uses with priority to domestic supply. It was evident that the flow even during drought periods, has potential to meet the basic needs of farmers, for drinking, preparing meals, baths, wash utensils and clothes and flushing toilets. As for the quality for home use, generally water meets health limits although in some cases the presence of Escherichia coli, requires careful recovery of the source and chlorination of water. According to the results, the production of water in springs located in soils and climate prevailing in Zona da Mata of Brazilian northeastern, it allows to meet basic needs for domestic supply from family farmers in small villages or isolated rural villages, being an alternative to conventional supply, already identified by the federal government in their recent plans for the supply of rural diffuse population.  Keywords: water resources; environmental management; rural development


Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 417
Author(s):  
Paolo Madonia ◽  
Gloria Campilongo ◽  
Marianna Cangemi ◽  
Maria Luisa Carapezza ◽  
Salvatore Inguaggiato ◽  
...  

Although groundwater is a strategic source in volcanic islands, most hydrogeochemical research on this topic has been focused on volcanic activity monitoring, overlooking general hydrogeological aspects. The same applies to one of the most studied volcanoes in the world, Stromboli Island (Italy). Here, we provide a hydrogeological scheme of its coastal aquifer, retrieving inferences about its potential use as a water supply source and for optimizing monitoring protocols for volcanic surveillance. Starting from the hydrogeochemical literature background, we analyzed new data, acquired both for volcano monitoring purposes and during specific surveys. Among these, there were saturated hydraulic conductivity measurements of selected rock samples and precise determinations of water table elevations based on GNSS surveys of wells. We identified a ubiquitous thin lens of brackish water floating on seawater and composed of a variable mixing of marine and meteoric components; inlets of hydrothermal fluids to the aquifer are basically gases, mainly CO2. Based on its hydrogeochemical character, the coastal aquifer of Stromboli could be used as a water supply source after desalinization by reverse osmosis, while the wells located far from the seashore are the most interesting for volcano monitoring, because they are less disturbed by the shallow geochemical noise.


2009 ◽  
Vol 38 (3) ◽  
pp. 418-430 ◽  
Author(s):  
Shida Rastegari Henneberry ◽  
Joao E. Mutondo ◽  
B. Wade Brorsen

An equilibrium displacement model of the U.S. meat markets is used to measure the potential impacts of promotion investment, differentiating meats by types and by supply source, taking into account the U.S. participation in global meat markets, and considering imperfect competition in the meat industry. The increase in U.S. producer welfare resulting from a 10 percent increase in promotion ranges from -$1.29 million to $2.60 million for U.S. beef producers and from -$0.96 million to $1.67 million for U.S. pork producers, depending primarily on the advertising elasticity used.


AIP Advances ◽  
2012 ◽  
Vol 2 (1) ◽  
pp. 012177 ◽  
Author(s):  
Yoshinobu Aoyagi ◽  
Misaichi Takeuchi ◽  
Sohachi Iwai ◽  
Hideki Hirayama

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1580 ◽  
Author(s):  
Shanghong Zhang ◽  
Jiasheng Yang ◽  
Zhongyu Wan ◽  
Yujun Yi

Water shortage problems are increasing in many water-deficient areas. Most of the current research on multi-source combined water supplies depends on an overall generalization of regional water supply systems, which are seldom broken down into the detail required to address specific research objectives. This paper proposes the concept of a water treatment and distribution station (water station), and generalizes the water supply system into three modules: water supply source, water station, and water user. Based on a topological diagram of the water network (supply source–station–user), a refined water resource allocation model was established. The model results can display, in detail, the water supply source, water supply quantity, water distribution engineering, and other information of all users in each water distribution area. This makes it possible to carry out a detailed analysis of the supply and demand of users, and to provide suggestions and theoretical guidance for regional water distribution implementation. Tianjin’s water resource allocation was selected as a case study, and a water resource allocation scheme for a multi-source, combined water supply, was simulated and discussed.


2018 ◽  
Vol 3 (6) ◽  
pp. 213
Author(s):  
A V Popova ◽  
V M Kisel ◽  
A Yu Malyavina ◽  
A S Bakerenkov ◽  
Yu R Shaltaeva

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