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Sequence optimization in longwall coal mining

✍ Scribed by L. Rocchi; P. Carter; P. Stone


Book ID
110213797
Publisher
Springer
Year
2011
Tongue
English
Weight
396 KB
Volume
47
Category
Article
ISSN
1573-8736

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Radio propagation within coal mine longw
✍ Y. P. Zhang; T. S. Ng; G. X. Zheng; J. H. Sheng; Y. Q. Wang πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 159 KB

Measurements of radio-wa¨e propagation at 900 MHz within two longwall faces of a coal mine are reported. Variations of recei¨ed power with distance ha¨ing distinct near and far regions separated by a breakpoint are obser¨ed. Values of propagation loss exponent and standard de¨iation before and after