A Surface-to-Borehole TEM System Based on Grounded-wire …
2020年4月7日 · The surface-to-borehole transient electromagnetic (TEM) method, which uses a rectangular loop as its source, has shown great potential in mineral exploration at greater depth. However, recent studies have demonstrated that a grounded-wire source can resolve the resistive targets and provide detection at greater depths than the loop source.
A Comparison of Surface-to-Coal Mine Roadway TEM and Surface TEM …
2019年11月18日 · Abstract: The surface transient electromagnetic method (TEM) is a geophysical technology normally used in detecting water-enriched zones. However, with an increase of mining depth, the accuracy and reliability of surface detection is gradually reduced, and surface TEM cannot meet the requirements of high-precision detection for coal mine ...
Transmission electron microscopy - Wikipedia
Transmission electron microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an image. The specimen is most often an ultrathin section less than 100 nm thick or a suspension on a grid.
Global surface temperature - Wikipedia
Global surface temperature (GST) is the average temperature of Earth's surface. More precisely, it is the weighted average of the temperatures over the ocean and land. The former is also called sea surface temperature and the latter is called surface air temperature .
Deep anomaly localization using surface-borehole TEM and its ...
2025年1月1日 · Surface-borehole transient electromagnetic method (TEM) offers advantages over traditional surface TEM method, including reduced interference from the ground and enhanced resolution capabilities for deep-seated local anomalies. In this study, the localization of deep anomalies was conducted using surface-borehole TEM methods.
Global surface temperature data: GISTEMP: NASA Goddard …
2024年9月19日 · NASA Goddard's Global Surface Temperature Analysis (GISTEMP) combines land surface air temperatures from GHCN-M version 4 with SSTs of the ERSSTv5 analysis into a comprehensive, global surface temperature data set spanning 1880 to the present at monthly resolution, on a 2x2 degree latitude-longitude grid.
Characterization of small-scale surface topography using transmission ...
2018年10月24日 · Here we demonstrate two separate approaches for measuring small-scale topography in a transmission electron microscope (TEM). The first technique harnesses 'conventional' methods for preparation of a TEM cross-section, and presents how these methods may be modified to ensure the preservation of the original surface.
Bonding and structure of a reconstructed (001) surface of SrTiO
2012年10月10日 · Using the (001) surface of the technologically important compound strontium titanate, SrTiO 3 (refs 4, 5, 6), as a model system for validation, our method shows that surface spectra are...
Transmission Electron Microscopy - an overview - ScienceDirect
Transmission electron microscopy (TEM) is a surface characterization technique that uses high electron beams, similar to SEM. The sample is allowed to pass through high electron beams.
Climate Change: Global Temperature - NOAA Climate.gov
2024年1月18日 · The likely range of total human-caused global surface temperature increase from 1850–1900 to 2010–2019 is 0.8°C to 1.3°C, with a best estimate of 1.07°C [2.01 ˚F].