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The results can be seen in Fig. 1a, which shows the yearly produced number of electric motors as well as the respective production value from 2010 until 2016.
Another possibility to save REM is the Grain Boundary Diffusion.
With this technology Dy diffuses only at the grain boundaries of the magnets and the anisotropy of the magnets can be increased.
Within convection heating there is a number of heat transfers through altering media that lead to energy losses.
The large production volume and the high number of electric motors operating in the German industry cause the associated importance of energy and resource efficiency.

In general, ceramic humidity sensors are porous and electrically resistive bodies whose conductivity changes due to water adsorption processes occurring on their surface, on grain boundaries and in pores [2].
When compared with M1, it is seen that the addition of 9 % Na2O did not show a pronounced effect on the average pore size and surface area, but increased the total porosity and the number of pores that are smaller than 20 nm.

The grain size and microstructure were examined using a scanning electron microscope (SEM).
It was mainly contributed to the colloid carbon balls has good hydrophilic which the surface structure was similar to polysaccharide distributing a large number of hydroxyl (-OH) and carbonyl (-COOH), When increasing the holding time, the produced carbon spheres would generate the reaction dehydration and polymerization with other carbon spheres producing the reunion phenomenon.

Particle size distributions of injection water impurities Injection impurities of grain size analysis is mainly by laser granulomata, through light scattering and refraction principle , quantitative analysis of the particle number and particle size of a certain volume of solution, to determine the distribution of solid phase particles[1-2].

Considering the multimillion volumes of asphalt mix production in Russia and the need of many regions to use modified asphalt pavement with extended operation temperature interval, those numbers increase enormously.
But with the addition of fine-grained rubber pavement becomes stronger and more resistant to the high-temperature rutting due to its high flexibility.

Evidently, Cu atoms refine the grain size by optical observation of Al-4.5%Cu-TiB2.
Theorical formation System of any number N of composites can be fitted with N (N-1) parameters obtained from binaries model as [5]: (1) In binaries system, equation deduced into the form below: (2) Fan et.al [4] solved the problem of calculating the pair of parameters and by setting the values of and approaching to zero.

The electrical grain or polarity molecule was effected by electromagnetic field, from which the work was made by electric field power and so as to the kinetic energy was increased.
The Fig. 1(c) showed a large number of differential shape iron particle was set into the ore at 1050˚C.

We define to be the number of sides of regular polygon.
Two-scale analysis method for predicting heat transfer performance of composite materials with random grain distribution[J] Science in China Ser.A Mathmatics, 2004, 17(101-110).

Table 1　 Index system on ecological security of land resources Target layer System layer Index layer Index code Unit Land Resources Ecology Security Complex Index（A） Natural System (B1) Arable land per capita The proportion of arable land Forest coverage Proportion of woodland area Soil and water coordination degree The farmland Hanlaobaoshou rate Land grain yields Land reserve resources rate C1 C2 C3 C4 C5 C6 C7 C8 hm2 % % % % % kg/hm2 % Economic System (B2) GDP per capita Net income of rural residents per apita Per capita disposable income of urban residents Degree of mechanized farming Amount of chemical fertilizer per hectare of arable land Pesticide application rate per hectare of arable land C9 C10 C11 C12 C13 C14 yuan yuan yuan % kg/hm2 kg/hm2 Community System (B3) Natural population growth rate Population density Level of urbanization Employment rate Per capita living space for rural residents Urban
Although the security value of the individual indicators can be reflected from different aspects of the situation of ecological security of land resources, to comprehensively reflect the status of the land resources ecological security, indicators consolidated calculation is needed, mathematical model of the value of the land resource ecological security indicators: T = (1) The“T” is the integrated value of the land resources ecological security index, The“n ” is the number of indicators, The“Ii” is the security values of individual indicators.

In particular, plantation timber, bleaching, dyeing, simulated wood grain processing and other technology, can eliminate the heartwood and sapwood, sooner or later material and color difference between the vortex lines, or simulate decorative effect of analog precious species wood.
Because the research in this area is very little, we may find more suitable photochromic materials by a large number of early experiments