نتایج جستجو برای: underground transportation

تعداد نتایج: 71782  

2006
Balachander Krishnamurthy

Rob Thomas of Team Cymru began the workshop with a scintillating keynote address on the underground economy. Although much of the research community working on unwanted traffic issues has focused on technical aspects of various subproblems, Rob brought his direct experience with ongoing study of the underground economy dominated by the criminal elements trading in credit cards, passwords, and t...

2014
Zhang De Li Gang Yan

The study introduces the man and machine positioning system of underground coal mines based on the ZigBee Wireless Communication Technology. It can realize the effective management of the precise positioning of machine and the workers. This article presents the composition of the system, the performance and management of content and network formation. The actual application shows that the under...

2000
M. E. Contadakis G. Asteriadis

The recent results of the research for earthquake precursory phenomena on the underground water level and temperature at the area Pieria of northern Greece are presented. The analysis of our observations in relation to the local microseismicity indicate that underground water level variations may be considered as precursory phenomena connected to the local microseismic activity in the area of P...

2014
PArThA SArAThi YogENDrA SiNgh DohArE

This paper deals with the issue of safety inside underground mines. The safety system designed based on wireless sensor network. The position of the different sensors inside underground mines is set by using analysis with ANSYS software. The safety system modeling in this paper is cost effective, energy saver , consistent, uninterrupted. This system performs automatic monitoring of different us...

2010
H. Omori T. Murakami H. Nagai T. Nakamura

Exploration of planets has significant chances of discoveries e.g. discovery of new substances, as well as finding keys to the origin of our planet. However, some terrains are poorly explored, especially the underground ones. Thus, we have developed underground explorers that use peristaltic crawling of an earthworm for a propulsion part and an earth auger (EA) for an excavation. In this paper,...

Journal: :ITOR 2007
Doreen A. Thomas Marcus Brazil David H. Lee Nicholas C. Wormald

The dominant working structure of an underground mine is a set of interconnected tunnels which provides access to ore zones and haulage of ore from the designated ore zones to the mill. This set of interconnected tunnels forms a network. We describe a mathematical network model and the modelling features of our two software tools for designing underground mine layouts that minimise associated c...

2001
Linlin Ge Chris Rizos Makoto Omura Shigeki Kobayashi

Ground subsidence monitoring is of paramount importance in relation to the safety and efficiency of underground mining operations. Moreover, in established coal fields in eastern Australia, it has become harder and harder to select underground minesites which can avoid major engineering structures both on the surface and underground (highways, bridges, buildings, abandoned workings of old under...

2001
N. Thompson P. Spencer P. Green

The Giant Mine, located in Yellowknife, Northwest Territories, Canada has been operating as a gold mine since 1948. Giant has been primarily an underground operation which used roaster technology to remove of gold from refractory arsenopyrite ore. The roasting process produced arsenic trioxide bearing dust as a waste product. This dust was pneumatically conveyed into underground storage chamber...

Journal: :پژوهش های جغرافیای طبیعی 0
اباذر اسمعلی عوری دانشیار گروه مرتع و آبخیزداری دانشگاه محقق اردبیلی محمد گلشن دانشجوی دکتری آبخیزداری دانشگاه علوم کشاورزی و منابع طبیعی ساری کیوان خرمی کارشناس‏ ارشد آبخیزداری دانشگاه علوم کشاورزی و منابع طبیعی ساری

extended abstract introduction water resources management in arid and semi-arid areas is very important to provide of water for stakeholders. in recent decades, construction of underground dams have been considered, because of its advantages. these dams have many advantages, e.g., unlike a surface dam, land is not submerged to store water and there is no danger of breaching due to natural or ma...

2008
Woo-Sung Jung Fengzhong Wang

We investigate the traffic flows of the Korean highway system, which contains both public and private transportation information. We find that the traffic flow Tij between city i and j forms a gravity model, the metaphor of physical gravity as described in Newton’s law of gravity, PiPj/r 2 ij , where Pi represents the population of city i and rij the distance between cities i and j. It is also ...

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