Search results

Among these tin phosphides, Sn4P3 possesses a special structure with alternating of Sn and Patoms dividing into seven layers [7].P atoms locate in the internal structure and more coordinations of atomic numbers in unsaturated surfaces would be effectively exposed, which could promote the formation of Sn4P3 with higher surface activity density [8].
With the milling time prolonged to 45 h, the diffraction peaks of Sn4P3became weaker, which was caused by the decrease of grain size and increase of the internal strain during the mechanical alloying [16–17].
With milling for 60h, a large number of Sn4P3 wires with various aspect ratios were observed in Fig. 5(b).
Compared with the primary samples without Al doping, it can be found that the number of Sn4P3 wires would increase with the milling duration.
Akbari, On the role of nano-size SiC on lattice strain and grain size of Al/SiC nanocomposite, J.Alloy.Compd. 484 (2009) 637–640.

Despite the large number of operating conditions used in the design and strength calculations of main pipelines, all the factors of pipeline operation are often difficult to take into account, since in most cases the calculation results change significantly due to the simplification of the design schemes, inaccuracy of the initial information, changes in operating conditions, etc.
The area of the pipeline samples is calculated by the formula: S = 2πrl, (2) where r – is the radius of the pipeline, l – is the length of the pipeline sample For the radius of the pipeline samples, we take the number 7.95 cm, since the diameter of the samples is 15.9 cm.
The grain size corresponds to a score of 2-3 (GOST 5639-65) and a score of 2 for banding throughout the entire wall thickness for the initial state (Fig. 5, a) and a score of 7-9 after operation (Fig. 5, b).
Also, in real working conditions, a gradual weakening of the metal occurs, depending on the duration of work, on the number of repairs performed, etc., which increases the chance of approaching the critical state of the pipeline (for 0.17C-1Mn-Si steel it is 12.0 A / cm).
The grain size corresponds to a score of 2-3 (GOST 5639-65) and a score of 2 for banding along the entire wall thickness for the initial state and a score of 7-9 after operation.

To improve the cement concrete deformation, small toughness traditional defects, with Adding the rubber grain in the concrete to form the rubber particles concrete; flexural modulus of Rubber particles of concrete and ordinary concrete was comparative studied, two kinds of concrete damping change was analyzed by using the finite element, through three point concrete trabecular bending test, the fatigue properties were comparative researched , the rutting test methods were used in proving the rubber particles of concrete of erosion performance; According to the test made the mechanical parameters of acquired in experiments , the applying the MEPDG 2002 design method, the road surface damage state were forecasted of the two kinds of concrete pavement in the design of the end; Experiment shows that rubber particles cement concrete flexural modulus is reduced by 12% than that of ordinary cement concrete, the damping ratio increased by 30%, the fatigue life have greatly improved, and surface
achieved initial success in the application of industrial and civil architecture, such as the use of shock absorption and sound insulation function in seismic foundation, the railway sleepers and sound barriers has wide application, but it is still in the research stage in the cement concrete pavement, the researches show that the good deformation property of scrap tire rubber particle in the cement concrete has the following significance: from engineering application view, rubber particles mixed in cement concrete materials to help improve the brittleness shortcomings, promote its absorbing heat insulation, sound absorption damping performance, impact resistance and crack resistance[1];From the economic point, strongly built rubber particles of cement concrete pavement, to break the high cost of asphalt pavement monopoly situation, can promote the development of local economy[2].From the section of environmental protection, rubber particles of cement concrete to be able to deal with a large number
Table 1 Flexural strength contrast between rubber particles concrete with normal concrete samples number failure load [kN] flexural strength [MPa] average flexural strength [MPa] normal concrete 1 22.8 5.81 5.64 2 22.4 5.71 3 21.2 5.41 rub-concrete 1 22.6 5.76 5.49 2 21.3 5.43 3 20.8 5.30 By bending test results indicate that two kind of mixture bending strength are satisfy the standard requirement (more than 5 MPa).
Table 3 Normal and rubber cement concrete fatigue properties contrast specimens name stress ratio stress level [MPa] load recycle number[N] logN normal-concrete 0.8 5.28 88 1.94 0.6 3.96 774 2.89 0.4 2.64 2732 3.44 rub-concrete (same stress ratio) 0.8 5.04 7843 3.89 0.6 3.78 8764 3.94 0.4 2.52 11356 4.06 rub-concrete (same stress level ) 0.83 5.28 304 2.48 0.62 3.96 4060 3.61 0.41 2.64 7893 3.90 Fig. 1 Normal and rub-concrete fatigue properties contrast Fig. 1 indicate that in the same stress than conditions, rub-concrete fatigue life is greater than normal cement concrete, with the improvement of the stress ratio, rub-concrete fatigue life is greater than that of normal concrete increased; In the same stress level, the two kinds of concrete are similar to the fatigue of the curve, the range of rub-concrete fatigue life increased basically the same under different stress level conditions.
Table 4 The structure experimental road pavement layer number thickness[m] layer name modulus of resilience[MPa] checking total stress[MPa] 1 0.30 normal concrete 42100 4.90 0.28 rub-concrete 37100 4.87 2 0.18 cement stabilized macadam 1800 - 3 0.30 lime and cement stabilized soil 1200 - 4 0 soil base 40 - Forecast Analysis Results.

Table 1 Main parameters of cement Density (kg/m3) Cement fineness Compressive strength (Mpa) Flexural strength (Mpa) Setting time (min) Stability 3d 28d 3d 28d Initial setting Final setting 3070 2.34% 7.8 11.2 35.3 49.7 217 263 qualified (2) Fine aggregate Common sand which bulk density is 1678kg/m3, maximum grain size is 5mm and fineness modulus is 2.73
Table 2 Main parameters of haydite Bulk density (kg/m3) Apparent density (kg/m3) Porosity (%) Cylindrical compress strength (Mpa) 1h Water absorption (%) Grain composition Particle size coefficient 800 1470 45.6 8.5 8.8 5-16 continuous size fraction 1.1 (5) GRT fiber The main parameters is shown in Table 3.
Acknowledgements This work was financially supported by the Provincial Special Major Project of Forest Engineering (project number: 501035), the Experimental Teaching Center of Provincial Structural Engineering (project number: 501042), and the key Discipline Project of Forest Engineering in SWFU (project number: 47002801) References [1] Luoshu Gong.

Figure 3 shows the relationship between the number of preconditioning cuts and the horizontal chipping width.
The abrasive grain appeared to even out uniformly on the blade surface.
Dicing blades of the same series have similar abrasive grains, but the surface conditions are not the same.
Fig. 3 Relationship between number of preconditioning cuts and horizontal chipping width.
Although the total number of experimental samples was small (the 23 µm sample was excluded due to the limitation of the heat adhesive and polishing machine), we could polish samples to 40.4 and 58.8 µm when aiming for target values of 40 and 60 µm, respectively.

Based on Service Oriented Architecture, the digital library platform allows the serving of coarse-grained services through the aggregation of fine-grained services offered by the different libraries.
Grid technology can make a processing and analysis for information and data in digital library service, which provides scientific foundation and decision for the library information service from a large number of valuable internet information and documents.
When better serving people, it is important to take into consideration the growing number of available digital libraries, the necessity to adopt advanced information technology in the digital library service.
Still, there are a number of issues on technology implementation waiting for further research including research methodology, information security, privacy, etc.

The large number of binders to be tested led to choosing toxic elements representative of the main groups of toxic elements: cations-forming Cd, Ni (true “heavy metals”), Pb and Zn (amphoteric heavy metals) and anions-forming metals and metalloids (Cr, V, As).
Collaterally, the same number of test bodies was prepared for determination of the contents of studied elements in dry matter by ICP-OES and for determination of toxic elements leachability by the batch method.
elements B80S0 - high belite clinker, not doped with foreign elements Cements from clinkers doped with P2O5 AP1 (cement from alite clinker with 1% P2O5) AP2 (cement from alite clinker with 2% P2O5) CAC 70% + AP1.5 30% (alite clinker with 1.5% P2O5) AP7/MKM (alite clinker with 7% P2O5 as granules of MBM ash) Cements with addition MBM ash CEM I 52.5N (90%) + MBM ash (10%) White CEM I (90%) + MBM ash (10%) CAC (95%) + MBM ash (5%) CAC (90%) + MBM ash (10%) CEM I 52,5N (50%) + CAC (40%) + MBM ash (10%) Cements with addition of diatomite CAC (80%) + calcined diatomite (20%) CEM I 52.5N (75%) + raw diatomite (20%) + MBM ash (5%) CEM I 52.5N (80%) + raw diatomite (20%) CAC (75%) + calcined diatomite (20%) + MBM ash (5%) CAC (80%) + raw diatomite (20%) CAC (75%) + raw diatomite (20%) + MBM ash (5%) CEM I 52.5N (70%) + CAC (10%) + raw diatomite (20%) Clinkers doped with SO3 B89S5, B83S8, A92S8, B90S6MA2.5 – cements made from clinkers doped with SO3, those do not contain yeelemite (numbers
Arsenic was dispersed in the hydrated binder matrix relatively homogenously, with moderately increased concentrations observable around grains of MBM ash as well as relict CA clinker grains (cf. 

The coarse sample appeared to be eutectic cell grains or boundary, and the finer flake-like eutectic is inside the cell.
In addition, decreases in eutectic size caused the number of eutectic cells that appeared to increase.
In addition, it was noted that number of particles formed increased with the amount of additive Ce, and the amount of 0.8wt% resulted in the highest number of particles nucleated, from 12 in base composite to 45 particles per unit mm2.
Theoretically, eutectic cells act as eutectic grains, and more cells with smaller size result in more eutectic boundaries.

The temperature control system allows different cooling temperature settings, which contributes to grain nucleation and prohibits the growth of grains.
Figure 1 shows that L* is Lightness, which represents lightness value, and the numbers from high to low represent the lightness from light to dark. a* is the green/red axis, and the number from high to low represents the color from red to green. b* is the blue/yellow axis, and the number from high to low represents the color from yellow to blue.

The number of cells attached to the scaffold was carried out using the dye exclusion method, namely by removing the cells attached to the scaffold using trypsin EDTA and then doing a cell count.
The synthetic coral scaffold also uses melting grains of ice which then the ice is removed by vacuum using freeze-drying.
The synthetic coral scaffold also uses melting grains of ice which then the ice is removed by vacuum using freeze-drying.
This reduces the surface area so that the number of cells is attached to the well base.
However, the size of the porosity that is too large will reduce the number of cell attachments.