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Digital Cameras for a Photogrammetric Production Environment: a Test of the Geometric Stability and Accuracy
Photogrammetry Mapping Digital Camera Geometry Accuracy
2015/11/23
The use of digital cameras in the photogrammetric work flow has gained widespread acceptance over the past few years. Whereas the geometric specifications of analogue aerial cameras have been thorough...
New tracers can identify frack fluids in the environment（图）
environment dentify frack fluids
2014/12/1
Scientists have developed new geochemical tracers that can identify hydraulic fracturing flowback fluids that have been spilled or released into the environment.
New tracers can identify frack fluids in the environment（图）
environment identify frack fluids
2014/12/1
DURHAM, N.C. – Scientists have developed new geochemical tracers that can identify hydraulic fracturing flowback fluids that have been spilled or released into the environment.
The tracers, which were created by a team of U.S. and French researchers, have been field-tested at a spill site in West Virginia and downstream from an oil and gas brine wastewater treatment plant in...