Search results

The thickness of 8# coal seam is 0.73~2.98m, with an average of 1.90m, coal bed structure is relatively simple. 8# coal seam is mainly affected by the lower five gray confined water disasters threated, the distance from five gray to the 8# coal seam is 22.5~43.18m, the average is 33m, grey qualitative pure dense thick bedded fine grained crystalline limestone the karst fissure development, Currently five gray level is +33.92m, the unit water inflow q=0.0017~16.12 . has stronger hydrogeology and water quality type belongs to the heavy magnesium chloride calcium carbonate with water.
I known weight of the sample point to the unknown sample, n is the number of the known sample points.
Acknowledgments This research was sponsored by Shandong Province Natural Science Foundation (grant number ZR2012EEM017).

Introduction During the last two decades a significant number of experiments on beams reinforced with stirrups made from FRP composite materials were conducted.
Fig. 1 Dimensions and the placement of the reinforcement of the beam B1 Because of the narrow inner dimensions of the FRP gratings mesh (27 x 27 mm) a concrete mixture with the maximum aggregate grain size of 8 mm was used.
Test Number of ACI 2006 JSCE 1997 CAN/CSA 2009 experiments Vtest/Vu Vtest/Vu Vtest/Vu This study (with shear reinforcement) 9 1.71 2.18 1.49 Results from literature 27 1.70 2.13 1.62 Conclusion The use of FRP grating with glass fibers as a shear reinforcement significantly increased the shear strength of tested beams.

In the unit code: I, II, III or IV – series number; the last sign in the brackets – specimen number; 2.Under the line – quantity and diameter of the reinforcing bars; below the line – total area of the reinforcing bars, mm2.
Here it could be useful to implement prior impregnation of the CFRP bars with epoxy compound with a further coating of the bars surface with abrasive materials, for example, with a quartz sand of different grain-size distribution.

Up to now, it has been reported that a rise in initial mold temperature coarsens grain size [7, 8], increases the secondary dendrite arm spacing (SDAS) [8, 9], aggravates shrinkage porosities [8], and prolongs the solidification time [8,9,10].
Furthermore, in the highest mold temperature case, 250M in Fig. 5i, a number of clockwise/counterclockwise vortexes were produced and scattered in the ingot body.
Acknowledgements Finkl Steel-Sorel Co. for providing the technical data, casting facility, material and extensive technical discussions and the financial support from the Natural Sciences, Consortium de Recherche et d’innovation Métallique du Québec (CRITM) and Engineering Research Council (NSERC) of Canada in the form of a Collaborative Research and Development Grant (CRD) under number 536444 are gratefully acknowledged.

Furthermore, modifying some parameters such as a high number of cycles, high extrusion pressure, high abrasive concentration and low abrasive grain size, improved the precision of surface polishing [4].
Figure 7(a) shows the polishing effects of the number of alternating cycles on surface roughness during AFM for 25 cycles.

In crystalline materials, HPT typically leads to grain refinement and complex structure transformations.
Under the SPD processing of other amorphous alloys nanocrystallization may not be observed [10, 12], however, a structural transformation takes place, the free volume changes, a number of properties change, and so on.
As was mentioned, a partial nanocrystallization under the HPT processing of amorphous RQ Ti50Ni25Cu25 was observed earlier in a number of works [5, 6, 9].

A large number of linear, rod-like, spherical inclusions (as big as a grain) were found in the inner ring, two linear inclusions (about 2000μm) in 15 × 15mm range.
Overall, the measured results were basically consistent with the theoretical analysis. 4. 3 Microstructure characteristics Metallographic examination showed there were a large number of inclusions in the inner ring of the stuffing box.

Instruction Laser shock processing (LSP) is a promising surface treatment technique and has been shown to be effective in improving the fatigue properties of a number of metals and alloys.
And residual stress was found to have a significance dependence on the coating grain result to the different effect of LSP.
Tab 2.Surface stress in 6061-T651 at three different coatings in LSP Sample number Coatings Laser power density �GW/cm2� Surface maximum stress�MPa� Sample 1 Without coating 3.31 +89.7 Sample 2 Aluminum foil 3.31 -224.9 Sample 3 Black paint 3.31 -280.1 Sample 4 Silica acid paint 3.31 -320.0 Moreover, if the coating material is correctly chosen, the stresses transmitted to the substrate target can be increased due to mismatch impedance effect.

That said, the revival of interest in EPD that followed the publication of the extensive review by Sarkar and Nicholson in 1996 [4] has generated, directly or indirectly, a great deal of subsequent work which has resulted in a number of far from fanciful potential applications .
The first stage of sintering is limited to the growth of interface contacts, and the development of the initial grain or phase boundary facets occurs almost immediately.
A number of processing defects had to be eliminated in the process of development, most notably gross porosity associated with poor packing of oversize aggregates and wedge formation during deposition due to incipient instability of the dispersion.

NPS is also suitable for the quantitative description of the noise frequency and number of the prints.
The maximum number K of segments available depends on the N value of ROI, and this in turns depends on the measured area.
Thompson, Quantification of banding, streaking and grain in flat field images, In Proceeding of IS&T PICS Conference (2002), p. 79 [3] C-M.