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For example the embankment of expressway is usually high, so it not only takes up large number of farmland but also needs a lot of clay resource to filling with.
By the grain size analysis, it can be known that the content of particles smaller than 0.075mm of the river sand is from 0.3% to 2.0%.
As the moisture content decreases, the safety factor increases, and this is mainly due to the moisture content reducing increases the friction between grains of sand, enhancing the shear strength.

The use of this processing technique reaches, under some circumstances, homogeneous and fine-grained alloys near room temperature.
During the processing itself, the powders mixtures are placed in a sealed vial, with a number of hardened steel or WC coated balls.
In order to separate the effects of grain sizes from internal strain, the full widths at half maximum of the Bragg peaks DK as a function of their K value can be plotted, K being the corresponding reciprocal space variable (K = 2 sin q/l) [22].

Large number of reports are dedicated to establish the RTFM as intrinsic nature of these systems [11].
Form the micrograph; it is clear that the films are composed of grains of nanosize.
The film is composed of nano grains as earlier seen through FE-SEM.

Although the D peak intensity of this sample was lower than the other samples, its D peak intensity was still higher than its G peak intensity, suggesting the grain size of graphene was very small, because D peak intensity is inversely proportional to the crystallite size [11, 12].
The number and size of the islands on the sample surface continuously increased with the growth time as shown in Fig. 3(d and e).
The intensity ratios of D to G peaks of samples grown for 30 minutes, 60 minutes, 90 minutes and 120 minutes were 1.07, 1.43, 1.07, and 0.933, respectively, suggesting that the grain size of graphene was still small even as growth time increased.

Suitable hot extrusion can effectively improve the defects such as segregation, porosity, and coarse grains in cast structure to obtain small and uniform recrystallized microstructure.
Effect of alloy element on thermal conductivity The Serial number Magnesium silicon ratio The iron content electrical conductivity thermal conductivity 1 1.56 0.20 28.0 0.000183 2 1.66 0.15 29.3 0.000192 3 1.73 0.20 29.1 0.000190 4 1.78 0.15 27.5 0.000180 5 1.83 0.20 26.0 0.000171 Adding the Rare Earth Elements Properly Rare earth has the effect of degassing, after joining the rare earths can react with the main gas hydrogen in aluminum liquid will product ReHx compounds.
And the grain boundary segregation and coring segregation basically eliminated [9].

If any of the original dimensions M or N is an odd number, delete the last row or column of the image.
Fig.6 Portrait engraving: a) grayscale image, b) binary image with color differentiation of stroke strength levels, c) engraved image The proposed image processing is applicable only for engraving on the frequently used black granite with fine grain.
Other setups of stroke strengths and other image enhancement processes need to be developed for other kinds of stone that have significantly different grain or colour.

Therefore, the white substance cannot be alumina abrasive grains, but the material (abrasive grains) peeled off during the friction process of the metal disc.
By comparing the dezincified surfaces of the three metal shaft sleeves after corrosion wear, the uniform wear marks on the surface of the alloy B shaft sleeve can also be seen, as shown in Fig.17 (b); There are obvious pits on the surface of alloy A shaft sleeve caused by material spalling; The surface of 316L stainless steel has the most serious wear, the largest number of pits, the larger pit area and the most uneven surface morphology, as shown in Fig.18 (b).

Fig.1 Proportion of cuting materials used for machining [1] High-speed steels can be obtained by three distinct methods, casting, powder metallurgy and spray forming. [2] By casting metallurgy as conventional production process of high speed steels, the high carbon and alloy contents and slow cooling of ingot casting result in a coarse as-cast microstructure, leading to very low toughness and ductility due to Non-homogeneous, coarse-grained texture with uneven distribution of highly coarse carbides.
Higher chemical and structural homogeneity, finer primary carbides, smaller grain sizes and absence of carbide stringers are some characteristics attained.
Fig. 2 The principle of the cutting life test by radial turning The basic requirements for the methodology of cutting life testing by radial turning are: · all tools used in the experiments must have the same geometry of the cutting wedge · in each of experiments is used new cutting wedge (tool), · it is necessary to keep a constant cutting depth ap and feed per revolution f · it is necessary to determine the number of tools in the selection so that the required level of statistical significance was reached.

A large number of parameters and the information can be gotten from obtaining image with computer vision technology, and not need measurement object, with the advantages of high efficiency, high recognition rate and unified standard.
In 2007, Wu Yanhong and others developed a rice quality detection system based on computer vision technology, single grain image could be extracted from the group grain image through this system.

Check the penetration and the number of equilibrium iterations used in each substep.
It also enables us like prospect to project studies and tests under different type of grains resulting from different materials in order to illustrate the friction behavior of the concrete mixture.
To also announce that as a prospect, the contacts friction problems are governed by any factors purely related to the surface state of the grains like surface roughness, thing which one did not take into account in our study.