Underground Distribution
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Investigation of the Roof Presplitting and Rock Mass Filling Approach on Controlling Large Deformations and Coal Bumps in Deep High-Stress Roadways
Abstract Roadway deformation and coal bumps are major challenges for underground engineering. Taking the Lu'an mining district in Shanxi Province as an example, the failure mechanism of deep high-stress roadway was studied. Numerical simulations and the similar material test were performed to investigate the effect of the roof presplitting and rock mass fill
Lat. Am. j. solids struct.. Publicado em: 27/05/2019
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2. Technical Losses Reduction in Underground Reticulated Distribution Systems using Artificial Neural Networks and Smart Grid Features
ABSTRACT This work presents the methodology, development and testing of an autonomous system, based on Artificial Neural Networks (ANN), for the reduction of technical losses in reticulated underground systems through the optimal control of the capacitor banks (CBs) present in the grid. The proposed methodology includes Smart Grid features, including practic
Braz. arch. biol. technol.. Publicado em: 22/10/2018
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3. N deposition affects allelopathic potential of Amaranthus retroflexus with different distribution regions
ABSTRACT This study aims to determine the allelopathic potential of Amaranthus retroflexus (Ar) with different climatic zones on seed germination and growth of A. tricolor (At) treated with a gradient N addition. Ar leaf extracts only displayed significantly allelopathic potential on the underground growth of Ar but not the aboveground growth of At. The alle
An. Acad. Bras. Ciênc.. Publicado em: 2017-06
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4. Protetor de redes inteligente e relé digital com tecnologia nacional integrando proteção, controle, telecomando e monitoramento viabilizando smart grid e geração distribuída a partir dos sistemas de distribuição subterrâneos nas grandes metrópoles / Inteligent Network Protectror with Digital Relay integrating Protection, Control and Monitoring enabling Smart Grid and Distributed Generation in Large Cities with underground Distribution Systems
A importância das novas tecnologias de informação, automação, monitoramento e sistemas eletrônicos inteligentes têm aumentado significativamente nos últimos anos. Essas tecnologias desempenham um papel fundamental na sociedade moderna e contribuem de forma decisiva para a resolução de importantes desafios para uma sociedade que quer ser mais prósp
Publicado em: 2011
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5. The burrows of Parastacus defossus (Decapoda: Parastacidae), a fossorial freshwater crayfish from southern Brazil
Parastacus defossus Faxon, 1898 is a fossorial crayfish species, which constructs its burrows in swampy areas in southeast Uruguay and in the state of Rio Grande do Sul, Brazil. The present field study was carried out in Lami, Porto Alegre, Rio Grande do Sul, Brazil, from May 2003 through August 2005. Environmental measurements (temperature, pH, dissolved ox
Zoologia (Curitiba). Publicado em: 2010-06
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6. Estudo de viabilidade de um sistema de monitoramento de baixo custo para os sistemas de distribuição reticulados subterrâneos / Viability Study of a Low Cost Monitoring System for Underground Power Distribution
This work presents a viability study for a Low-cost Monitoring System (SMBC), through the examination of the operational improvements on electrical network distribution systems when new functions are added to network protectors relays allowing remote monitoring and control using typical automation protocols. The improvements on energy supply quality by reduc
Publicado em: 2010
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7. Contribuições ao estudo comparativo dos efeitos de descargas atmosféricas em sistemas compostos por cabos aéreos e subterrâneos a seco e a óleo
By means of computing simulations, it is presented in this work a comparative study of the effects of electromagnetic transients proceeding from indirect and direct atmospheric discharges in mixed-transmission lines, which consist of aerial and underground parts with oil and dry type isolation. The developed and implemented model in the ATP computing environ
Publicado em: 2009
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8. DIAGNÓSTICO DO USO DA ÁGUA COM BASE NOS PROCESSOS DE OUTORGA. ESTUDO DE CASO UPGRH PIRANGA
The disordered territorial occupation and the increase of urbanizations, as well as the increased water demand, has been turning the water uses a tangle of conflicts, day after day. The solutions to solve these conflicts are not always simple or easy. The institutionalization of the rights permit methodology as a process of water management aims the rational
Publicado em: 2009
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9. Localização de defeitos em alimentadores primários subterrâneos : formulação estendida baseada na impedância aparente
O presente trabalho apresenta uma abordagem estendida para o diagnóstico de faltas em sistemas subterrâneos de distribuição de energia. O esquema proposto desenvolve modificações às técnicas de localização de defeitos em sistemas de distribuição aéreos baseadas no cálculo da impedância aparente, adaptando-as para a aplicação em alimentadores
Publicado em: 2009
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10. Avaliação da Qualidade da Água do rio Pitimbu
The Pitimbu River Basin is concern reason, therefore this is one of the mains freshwater sources for the Natal city supplying. The Pitimbu waters river flow into Jiqui pond, as the main supplier of this, that supplies 16% of Natal population and there is a bigger importance despite the supplying of a parcel of Natal city made joining underground waters with
Publicado em: 2008
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11. DinÃmica vegetacional e climÃtica holocÃnica da Caatinga, na regiÃo do Parque Nacional do Catimbau, BuÃque - PE
The main objective of the present work was to describe the Holocene dynamics of the Caatinga vegetation, in the region of the National Park of Catimbau, BuÃque, PE, Brazil. Palynological analyses were carried out from clay, rich in plant organic-matter, deposited on the low slopes of the Serra do JerusalÃm, in the Brejo de SÃo Josà Farm (8 32â 45ââS
Publicado em: 2008
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12. Underground waters explore and market analysis by water transport companies in São Paulo / Campinas metropolitan area / Avaliação da situação da explotação e comercialização das aguas subterraneas por empresas de transporte de agua a granel nas regiões metropolitanas de São Paulo e Campinas
The environmental subject in Brazil, in terms of administration of water resources, constitutes a contemporary subject of the largest importance and it faces ompetence controversies in face of the legislation and attributions in the federal and state extents. The present work seeks to draw a survey of the activity of transport of drinking water through truck
Publicado em: 2007