نتایج جستجو برای: tunnel support systems

تعداد نتایج: 1768124  

Journal: :Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering) 2016

Journal: :Applied sciences 2023

Strain burst hazard is one of the main challenges that faces deep underground environments. To manage it, it needed to assess its probability occurrence (or potential). Various methods have been proposed over years phenomenon early on. However, due uncertainties in rock mass properties and physical processes phenomenon, mitigation measures are an additional important line defense ensure workpla...

2014

The research group of Professor Hideo Ohno of the Center for Spintronics Integrated Systems, the Research Institute of Electrical Communication, and the WPI Advanced Institute for Materials Research, together with ULVAC, successfully fabricated magnetic tunnel junctions with a diameter reduced to 11 nm. They demonstrated that high thermal stability and low power consumption can be simultaneousl...

Journal: :IOP Conference Series: Earth and Environmental Science 2020

Journal: :مدیریت فناوری اطلاعات 0
محمد اسماعیل فدایی نژاد دانشگاه شهید بهشتی سیدجلال صادقی شریف دانشگاه شهید بهشتی حمید بناییان دانشگاه شهید بهشتی

intelligent use of data and information in a large company for management decisions are the essential requirements of all managers. in addition, the necessity of paying attention to the environmental competitiveness increases the importance of responding to these needs. information systems and tools of it in recent decades have played a special role in increasing the respond to these demands. o...

2017
Panpan Zhou Will J. Hardy Kenji Watanabe Takashi Taniguchi Douglas Natelson

High quality Au/hBN/Au tunnel devices are fabricated using transferred atomically thin hexagonal boron nitride as the tunneling barrier. All tunnel junctions show tunneling resistance on the order of several kΩ/μm. Ohmic I-V curves at small bias with no signs of resonances indicate the sparsity of defects. Tunneling current shot noise is measured in these devices, and the excess shot noise show...

1999

The complexity of the skewed 3-D boundary layer (figure 3) necessitates the use of multiple coordinate systems. The Tunnel coordinate system is right-handed with the x-axis parallel to the tunnel centerline pointing downstream and the y-axis perpendicular to the tunnel floor pointing up. The Wall-Shear-Stress coordinate system is right-handed with the x-axis in the shear-stress direction at the...

2015
R. Montero J. G. Victores S. Martínez A. Jardón C. Balaguer

Nowadays, the vast majority of the tunnel inspection processes are performed manually by qualified operators. The process is subjective and the operators need to face very uncomfortable and even dangerous conditions such as dust environments, absence of light, or toxic substance exposition among others. Robotic technology can overcome many of these disadvantages and provide quality inspections ...

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