نتایج جستجو برای: underground cavities

تعداد نتایج: 39958  

Journal: :Physical Communication 2009
Ian F. Akyildiz Zhi Sun Mehmet C. Vuran

Wireless Underground Communication Networks (WUCNs) consist of wireless devices that operate below the ground surface. These devices are either (i) buried completely under dense soil, or (ii) placed within a bounded open underground space, such as underground mines and road/subway tunnels. The main difference between WUCNs and the terrestrial wireless communication networks is the communication...

Journal: :Nature Photonics 2013

Journal: :Nature Physics 2011

Journal: :Journal of Fluid Mechanics 2011

Journal: :Nature Photonics 2012

Journal: :Physics of Fluids 2013

2010
Giovanni LANZANO Antonio DI CARLUCCIO Filippo SANTUCCI DE MAGISTRIS Giovanni FABBROCINO

The seismic behaviour of underground structures is generally satisfactory compared to the above-ground ones. However, despite of the buried structure confinement, in recent strong seismic events some underground structure as tunnels, pipelines and tanks suffered high damage; for this reason, a strong effort is focused to evaluate the seismic vulnerability of these structure and to give codes in...

2011
Quan Jiang

The global energy shortage has revived the interest in hydroelectric power, but extreme geological condition always pose challenges to the construction of hydroelectric power stations with large underground caverns. To solve the problem of safe design of large underground caverns, a Chinese-style intelligent stability design, representing recent developments in Chinese techniques for the constr...

Journal: :Ad Hoc Networks 2011
Zhi Sun Pu Wang Mehmet C. Vuran Mznah Al-Rodhaan Abdullah Al-Dhelaan Ian F. Akyildiz

Underground pipelines constitute one of the most important ways to transport large amounts of fluid (e.g. oil and water) through long distances. However, existing leakage detection techniques do not work well in monitoring the underground pipelines due to the harsh underground environmental conditions. In this paper, a new solution, the magnetic induction (MI)-based wireless sensor network for ...

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