نتایج جستجو برای: underground structure
تعداد نتایج: 1581212 فیلتر نتایج به سال:
We describe the discovery of Aedes aegypti underground breeding site in the Pinheiros neighborhood of São Paulo, SP, during an entomological survey program performed in 2016. Even with intense surveillance and vector control, large numbers of mosquitoes were present in this area. A detailed investigation allowed for the detection of Ae. aegypti in an underground reservoir used for rainwater sto...
At the beginning of the 21 st Century, before the power of online social networking became apparent, several studies speculated about the likely structure of organised cybercrime (Mann and Sutton 1998; Brenner 2002). In the light of new data on cybercriminal organisations, this paper sets out to revisit their claims. In collaboration with the Serious Organised Crime Agency (SOCA), this paper ex...
Incremental dynamic analysis constitutes the basis of seismic performance evaluation and vulnerability assessment. In this paper, a typical two-story three-span subway station structure is selected as an example its incremental procedure are presented, including selection ground motion, intensity measure limit state determination. The provided in study can be for further on design underground s...
I n this paper, we present a robot system for inpipe inspection of underground urban gas pipelines. The robot is configured as an articulated structure like a snake with a tether cable. Two active driving vehicles are located in front and rear of the system, and passive modules such as a control module are chained between the active vehicles. The proposed robot has outstanding mobility oflered ...
A utility tunnel is defined as an underground structure containing one or more utilities, permitting the installation, maintenance and removal of the systems without the necessity of making street cuts or excavations. These underground facilities contain all essential utilities serving large urban areas collected together in a tunnel; therefore they are an inviting target for sabotage or vandal...
The sectional stresses (M, N) in a gallery lining are computed comparatively numerical by FEM taking into account the interaction underground structure – surrounding ground and analytical by Protodiakonov method. The last method is based on coincidence arch born in ground over gallery. Comprehensive analyses allow to settle the domain in which Protodiakonov method can be applied as well as the ...
the construction of underground tunnel plays a more and more important role in the development of big cities. one of the most important problems caused by the construction of the tunnel is that underground excavation will cause large settlement of the ground and buildings. previous studied showed the difference between numerical and experimental results. in this study the case study of niyayesh...
سازه های زیرزمینی که در مناطق لرزه خیز قرار دارند بایستی علاوه بر بارهای استاتیکی که از زمین اطراف بر آنها وارد می شود نیروهای دینامیکی حاصل از زلزله را نیز تحمل نمایند. معمولا سازه های زیر زمینی دارای سطح مقطعی کوچکتر از طول موج تحریک ورودی می باشند. بر این اساس می توان از روش های شبه استاتیک و شبه دینامیک برای تحلیل سطح مقطع این گونه سازه ها استفاده کرد. در این مقاله از یک روش تحلیل جدید که ب...
This paper presents a case study of cellular coverage in an underground transport system, the Rio de Janeiro Metropolitan. The project was developed at WiNGS Telecom and implemented by a pool of companies for Algar Telecomunicações Leste (ATL), the B-band operator in Rio de Janeiro, Brazil. The project characteristics, assumptions made and chosen solutions are described, as well as the propagat...
Application of High Performance Computing to Earthquake Hazard and Disaster Estimation in Urban Area
Integrated earthquake simulation (IES) is a seamless simulation of analyzing all processes of earthquake hazard and disaster. There are two difficulties in carrying out IES, namely, the requirement of large-scale computation and the requirement of numerous analysis models for structures in an urban area, and they are solved by taking advantage of high performance computing (HPC) and by developi...
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