منابع مشابه
Water Inrush Characteristics with Roadway Excavation Approaching to Fault
Water inrush disaster is an important factor in restricting safe production of the coal mine. Taking the roadway in seam in Danhou Coal Mine, as the engineering background, according to the spatial relationship of the roadway, the impermeable layer, the fault and the loading conditions, the fault activation mechanical model under the roadway excavation disturbance was built, and the fault activ...
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Focal choroidal excavation is a choroidal pit that can be detected by optical coherence tomography. Central serous chorioretinopathy, choroidal neovascularization and polypoidal choroidal vasculopathy are pathologies associated with focal choroidal excavation. In this article, we present the follow-up and treatment outcomes of three eyes of two patients with focal choroidal excavation.
متن کاملIterative Autonomous Excavation
This paper introduces a Cartesian impedance control framework in which reaction forces exceeding control authority directly reshape bucket motion during successive excavation passes. This novel approach to excavation results in an iterative process that does not require explicit prediction of terrain forces. This is in contrast to most excavation control approaches that are based on the generat...
متن کاملWorld under water
The Paris accord on climate change set an ambitious target of limiting climate change to 1.5°C, but the signatories appear to be in no hurry to undertake the revolutionary steps that would be necessary to achieve this. Meanwhile, ‘exceptional’ flooding events are becoming the new normal around the world, revealing how poorly we are prepared for change.
متن کاملUnder Water Surveillance Hydrobot
Under water surveillance hydrobot is a moving surveillance device whose motion can be controlled using a joystick.It can be used to monitor far distances and wide areas for under water objects. It has an acoustic video system which develops an underwater surveillance system. Ultra high frequency wireless camera is used to capture the underwater images. This proposed system resists the overflow ...
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ژورنال
عنوان ژورنال: Nature
سال: 1973
ISSN: 0028-0836,1476-4687
DOI: 10.1038/243174a0