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Generation rate R1 per impinging ion of primary beam is done by Eq. 1, where δ is target density, ρ is 13 C ion range in target, A(target) is target atomic weight and Na is Avogadro number
number 05. 8Li diffusion.
In Fig. 7 is represented a scheme of a magnified cross-section of the UTR146 graphite. 8Li is generated inside the grains, then it will diffuse in a grain reaching its surface, hereafter some different way of diffusion/effusion are available, as indicated in Fig. 7 with numbers from 1 to 4.
This is a multi-grain diffusion.
At the operating temperature of 2000 - 2600 K, once the particle reaches the grain boundary it can diffuse in a neighbour grain or effuse in the target porosity, but the probability of re-diffusion inside a grain is quite high.

In both cases microbands were found in the majority of grains examined with many having more than one set.
The material was recrystallised containing equiaxed grains with an average grain size of 80 ± 12 μm.
Results Microbands were observed in 41 grains after forward/forward (F/F) torsion and 60 grains after forward/reverse (F/R) torsion.
The analysed grains mostly displayed either one or two sets of microbands with a few grains exhibiting three sets of microbands; the exact numbers are summarised in Table 1.
Number of grains analysed and the number of sets of microbands within each grain Total grains analysed No. grains with 0 MB's No. grains with 1 MB's No. grains with 2 MB's No. grains with 3 MB's 0.25 F/0.25F 41 6 13 26 2 0.25 F/0.25R 60 10 30 24 6 An example grain of the forward/forward material is shown in Fig. 2a.

The coating surface has a large number of grains with various sizes.
The SEM micrograph of the surface of the sample (Fig.1)shows that the coating surface has a large number of grains with various size.
The size of the grains gradually increases with increasing duty cycle, and the surface becomes coarser.
It is worth to note that many bigger grains accompanied by bigger pores.
The surface coating has a large number of pore and compact layer shows itself a good combination with substrate magnesium alloy

The Co grains in the films show hcp structure with (11 20) preferred orientation.
According to the Zener criteria[8], the larger the number of particles available in the matrix, the finer the grain size of matrix will be.
The pure Co film has larger Co grains than the composite coatings and three or four magnetic domains occurred in one grain, as shown in Fig. 9(a).
Firstly the Al2O3 reduces the grain size of Co during the electrodeposition process.
The Al2O3 nanoparticles reduce the Co grain size by increasing the heterogeneously nucleation sites and retarded the grain growth of the matrix.

The figure shows that number 1, 3, 4, 5 of the axial load are maximal.
The numbers 6 and 7 indicate the maximal effective strain rate.
Figure 9 presents the bicycle pedal (No. 8) p1 point of the micro-grain organization chart, with an average grain size of 2.383 μm2/μm3.
Figure 10 presents the bicycle pedal (No. 8) p2 point of the micro-grain organization chart, with an average grain size of 2.385 μm2/μm3.
Figure 11 presents the bicycle pedal (No. 8) p3 point of the micro-grain organization chart, with an average grain size of 2.409 μm2/μm3.

This design is based on the structure of various thresher, the main research of the corn thresher drive system structure, working principle, and on this basis, based on the design of the finished parts, on corn dish itself characteristic to carry on the design, when threshing grain rod roller high-speed rotation, the corn by continual lines between grid type and gravure roller rod, and the action between the corn cob constantly collide with each other, to achieve the seed plate separation, then the net grains, complete threshing.
The function of it is for grain threshing. 1)The work principle of threshing device Based on the characteristics of the corn crop threshing and the corn thresher threshing device adopts the workings of a threshing.
Roller speed for corn thresher. 2)The type of threshing device The corn thresher threshing device is the type of movement types are tangent type, threshing part type for grain lever.
Grain lever threshing device is a kind of full feeding tangential threshing device, the cylinder and the grid of the grain rod shape concave board in two parts, the roller of grain rod, drum shaft, wheel, etc, they are made between welding.
Screening device Screening device is mainly completed by grid type hollow board, it is made of a certain number of bar and two main beam and two vice beam, gap between every two bars can be corn gets stuck, and then rapidly spinning lines pole corn forcibly threshing roller will be stuck, of course, whether at work or when installation, grid type hollow board is fixed.

Because of shallow groundwater level, it was easy to rise to the surface above the elevation after coal mining and result in a large number of high quality cultivated land perennial water [3, 4].
Due to the lack of filling materials, farmland with subsidence depth and perennial water was difficult to recovery grain production through reclamation technology, the recovery rate of farmland was in 50% to 70% and caused cultivated land area decreased 1/3 nearly [5-7].
The study area is an important production, processing and supply base for grain, cotton, oil and other agricultural products because it produced a number of grain accounted for 34.28% of the nation with 28.60% of the national arable land, so it has played a significant role in the protection of national food security.
At present, the reduction of cultivated land has been reached to more than 30 × 104ha, the economic cost of food and cash crops reached highly to 6 billion yuan per year, reduction of arable land area reached to 17 × 104ha with economic cost of 8 billion yuan per year, and that number increased year by year.
The recovery rate of cultivated land in governance subsidence was between 50% and 70%, and because of the reclamation of non-governance subsidence land was more difficult, so they usually used as water, and then resulted in a large number of farmland area reduced, and the unprecedented pressure on cultivated land protection.

It is well established that compared to the coarse-grained materials, the fine-grained materials show a higher resistance against fatigue-crack initiation [11,12].
It is shown that the (β-ST+900°C WQ) sample shows a large number of martensite lathes distributed in β coarse grains.
During USSP process, as strain increases, dislocation density increases, and the initial grains were divided into large number of nanograins with high angle boundaries until the process of dislocation accumulation is balanced by dislocation multiplication [23].
Gu, Ultrafine-grain metals by severe plastic deformation, Mater.
Suresh, Grain size effects on the fatigue response of nanocrystalline metals, Scr.

It has been found that although the microstructures of the three forging parts are all composed of α-Mg and β-Mg17Al12 phases, their shapes, sizes, numbers and distributions are all different, which also influences their mechanical properties.
In the subsequent grain growth, it was hindered by the near grain growth and did not form a coarse dendrite shown in figure (a).
The number and size of these liquid islands depend on the isothermal time under semi-solid temperature.
When the isothermal time is short, there are more liquid islands in the grain of α-Mg.
The other liquid in the primary α-Mg grain does not participate in the deformation.

Decreasing of the titanium grain size increases the number of ways for new phases formation, due to the facilitated diffusion of alloying elements.
The smallest grains of oxide phases with up to 20 nm are localized at dislocations in the volumes of the target grains.
With an increase in the grain size, we detected increased thickness of the Ti3Al grain and primary localization on the board of grains.
There is an ordered Ti3Al phase in coarse-grained titanium targets (17 microns), localized in the form of interlayers not only along the grain boundaries, but also in the body of α-Ti grains.
In titanium with grain size 1,5 mm TiAl3 phase particles localized along the matrix grain boundaries.