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However, one can find in literature merely small number of papers reporting research results concerning WC cermets with a Ni or CoCr binder and all of them focused on corrosive behavior.
The three kinds of feedstock powders were consisted of WC of an identical grain size at 0.5-2.0μm.

The solar irradiance, collector area, flow rate of hot dry air, heat transfer coefficient, number of system cover, radiative properties of collector and its cover were among the factors used in system thermal prediction as shown in Fig. 4.
Cenkowski, Grain Drying.

The constitutive relation of interface reflect the relationship between its displacement and stress, On the basis of a large number of tests, scholars have proposed a variety of model.
Above work mostly based on static test, and focused on the study of clay, sand and coarse grained soil, dynamic test is fewer.

It can not be changed with the different grain and color in the covered background. ③ The boundary of the shadow will change with the variation of the geometrical characteristic in background surface.
Also, i(x, y) can be calculated as the number of light power per receiving object surface area and can further be represented as [3]:

For the larger molecules, the fact that the time to evaluate the potential goes as the square of the number of sites leads to computational inefficiency.
Results and discussion We have performed off-lattice Monte Carlo (MC) simulations of a system of disc shaped mesogens described above with simulate samples of N =60 particles modeled with the coarse grained pair potential described before.

At present, the method of chemical oxidation is more common, which generally used large scale and high-purity graphite as raw material, that is graphite grain size for 200-1190µm and fixed carbon content is more than 99%, sulfuric acid as intercalating agent, potassium permanganate as oxidant [7].
In addition, a large number of polar groups, such as hydroxyl, ether and carboxylate groups, on the surface of the EG layers were easily processed.

Samples with different number of layers are achieved by dip coating in the slurry, thereafter a drying at 100 °C for 1 h is conducted.
Large grain growth by annealing of Ag-covered Bi2Sr2CaCu2O8+d thin films and its application in the fabrication of intrinsic Josephson junctions, Supercond.

Nevertheless, Magnesia hydration is a key concern in refractory castable processing, it is due to the volumetric expansion that follows magnesia hydration is related to the density mismatch between the magnesium oxide (ρ= 3.5g/cm3) and its hydroxide, magnesium hydroxide(ρ= 2.4g/cm3), the reason above can result in cracks or even explosion during the first heating-up.There are a great number of studies describing the MgO hydration behavior in castables systematically[2,3].
According to the MgO surface model, there is inevitably straight steps, normal corners, and simple kinks in the MgO surface, a roughly 2.5-fold volumetric expansion appear followed by MgO surfaces interactions with water(Fig.2), when the MgO particle size distribution is determined in water, the hydration of MgO is carried out by the contact of this oxide with liquid water, so the reaction of MgO +H2O→Mg(OH)2 is happened, that is to say, MgO undergoes an expansive hydration reaction as a result of the different densities between the magnesium oxide (ρ= 3.5 g/cm3) and the corresponding hydroxide formed (ρ= 2.4 g/cm3), Mg(OH)2, also known as brucite[4-6] In fact, however, MgO grains used as determined sample are polycrystalline and could generally be described as several single crystals bonded together.

With the rapid development of concrete technology, increasingly higher technical requirements of modern concrete sand, especially with high strength and high performance concrete to aggregate are strict, fewer and fewer number of natural sand can meet their requirements, not even.Thus, the development of new sources of sand (artificial sand) is imperative [1-2].
Maximum grain size of coarse aggregate is 31.5mm.

It can be seen from the quantity statistics on failure elements at different loading stages (in Figure 3) that the number of failure elements at the CE stage is quite large.
And then the tensile cracks are continuously produced on the grain boundaries, which is consistent with the conclusion mentioned in Reference [12].