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1-6 of 6
Keywords: accuracy
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Proceedings Papers
Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-628
... Artificial Intelligence displacement Excavation Procedure evaluation machine learning function parameter correlation excavation method rock mass ground transportation information excavation Case History procedure rail transportation accuracy prediction application sequential...
Proceedings Papers
Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-556
... extensometer accuracy electrolevel string recent in-tunnel movement construction rail transportation new tunnel distortion remote reading method settlement RECENT IN-TUNNEL MOVEMENT MONITORING EXPERIENCE IN LONDON Michael L Cooper1 and David N Chapman2 ABSTRACT It is considered necessary...
Proceedings Papers
Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-217
... ABSTRACT: A new method for analysis of size, shape and roughness of aggregates based on a 3-D-laser-digitising technique is presented. Measurements of aggregate particles are carried out by a system consisting of a laser sensor and a co-ordinate-measuring machine; the accuracy of the system...
Proceedings Papers
Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-041
... on the second cycle, slightly less than 1 ms after the first break would have been picked by hand. An error of less than 1 ms on one geophone has little effect on location accuracy. When locations are calculated using a least squares error algorithm, timing errors are averaged out over all signal arrival times...
Proceedings Papers
Paper presented at the ISRM International Symposium, August 31–September 3, 1986
Paper Number: ISRM-IS-1986-050
... ABSTRACT: The rock stress is measured by means of borehole deformation gauge in several test sites in the western region of Tokyo. The accuracy of rock stress measurement with this gauge is discussed from the technical point of view, The state of rock stress determined by this gauge...
Proceedings Papers
Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-168
.... 4) H-shape steel of l50mm width was used as strut and any void between the ceiling and strut was filled with low temperature resistant mortar shown in Fig. 5. Every vertical strut was equipped with vibrating wire strain gages to measure change of the axial load due to exca- vation. The accuracy...