نتایج جستجو برای: trenching
تعداد نتایج: 253 فیلتر نتایج به سال:
Abstract Carbon fiber reinforced plastic (CFRP) is extensively used in automotive and aerospace industries with the aim to achieve reduction on emissions by reducing weight. Due governmental regulations reduce environmental impact waste, need for remanufacturing CFRP becoming an interesting area of application economic benefits industry. This important as manufacturing carbon a costly process m...
The Snip mine, on the south side of the lskut River, is 70 kilometres east of Wrangell. Alaska, and 1 I O kilometres northwest of Stewart, British Columbia. The mine is jointly owned by Cominco Ltd. (60%) and Prime Resources Group Inc. (40%). Production began in January, 1991, at a rate of 360 tonnes per day. Gold-bearing quartz veins were first discovered by Cominco prospectors. Limited t...
Two-dimensional and three-dimensional seismic surveys were conducted across the Oquirrh fault, Utah with the purpose of imaging the fault structure to a depth of about 15 m. Results show that the 3-D tomogram clearly delineates the fault zone and a colluvial wedge, both of which correlate extremely well with the geologic cross-section interpreted from an adjacent trench. The thickness of the co...
Several researchers in robotics and artijicial intelligence have found that the commonly used method ofplanning in a state (conjiguration) space is intractable in certain domains. This may be because the C-space has very high dimensionality, the “C-space obstacles” are too diflcult to compute, or; because a mapping between desired states and actions is not straightforward. Instead of using an i...
This study proposes trenching piezoelectric (PZT) material in a thicker PZT pyroelectric cell to improve the temperature variation rate to enhance the efficiency of thermal energy-harvesting conversion by pyroelectricity. A thicker pyroelectric cell is beneficial in generating electricity pyroelectrically, but it hinders rapid temperature variations. Therefore, the PZT sheet was fabricated to p...
Forested ecosystems diversified more than 350 Ma to become major engines of continental silicate weathering, regulating the Earth's atmospheric carbon dioxide concentration by driving calcium export into ocean carbonates. Our field experiments with mature trees demonstrate intensification of this weathering engine as tree lineages diversified in concert with their symbiotic mycorrhizal fungi. P...
Two-dimensional and three-dimensional seismic surveys were conducted across the Oquirrh fault, Utah with the purpose of imaging the fault structure to a depth of about 15 m. Results show that the 3-D tomogram clearly delineates the fault zone and a colluvial wedge, both of which correlate extremely well with the geologic cross-section interpreted from an adjacent trench. The thickness of the co...
Time-averaged series of granulation images are analysed using COLIBRI, a purpose-adapted version of a code originally developed to detect straight or curvilinear features in aerospace images. The algorithm of image processing utilises a nonparametric statistical criterion that identifies a straight-line segment as a linear feature (lineament) if the photospheric brightness at a certain distance...
An optimized deep reactive ion etching (DRIE) process for the fabrication of SiC microstructures has been developed. The optimized process enables the etching of 4H and 6H SiC to depths > 100 μm with the required characteristics of (1) high rate (>0.5 μm/min), (2) vertical sidewalls, (3) minimal microtrenching at the sidewall base, and (4) smooth etched surfaces. The optimized process was deter...
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