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The more barrier the greater relative number value is, so with the increase of the distance average energy accepted dropping speed is faster and faster [4-7].
Suppose in the square area of 100 m * 100 m, the communication radius is 50m, the unknown node numbers are 100.
Carry through simulation with the localization algorithm before and after improving separately when the numbers of anchor nodes change, the simulation results is as shown in Fig. 2.
Fine-grained Network Time Syn-chronization Using Reference Broadcasts[A].

After carbonitriding with rapid acsess and subsequent hardening, surface steel has fine-grained structure because martensite (A → M) transformation does not take place until the end, and steel contains decay products.
In the first zone, alongside with the residual austenite, large number of carbonitrides have been formed.
In moving deeper into the layer, number and size of carbide and nitride particles decreases.
Number 11

Introduction Amorphous hydrogenated carbon (a-C:H) is a technologically very interesting material with a number of potential industrial applications, including razor blades, automotive components, critical engine parts, mechanical face seals, scratch - resistant glasses and micro-electromechanical systems [1]-[3].
The gas is fed in to the deposition chamber through this tube, uniformly dispersed by the holes between the grains of sintered powder, which acts as a sieve.
Magnetic field is used to confine electrons in the plasma and by doing so to increase the number of ionizing collisions between electrons and neutral atoms in the plasma.
Acknowledgements This work was supported by a grant of the Romanian National Authority for Scientific Research, CNDI– UEFISCDI, project number 160/2012, PN-II-PT-PCCA-2011-3.2-1453 References [1] S.

Steel S 235 (Fig. 1) is fine grained steel, quality structural steel, statically and dynamically loaded, where in standard is enshrined chemical composition and mechanical properties.
D (A) Selected parameters of the experiment (Tab. 2) Tab. 2 Parameters of the experiment Number of sample Electrode type Diameter Welding current 1.
Tab. 3Measured values of hardness Sample number Z.M.
[HV1] 1. 180,4 214,1 179,3 2. 197,6 223,5 206,1 3. 196,0 218,9 222,7 4. 183,4 185,7 192,5 5. 191,6 210,2 193,2 6. 173,8 216,4 179,2 In the fact of this measuring of hardness and non destructive testing and metallographic section can be stated, that the best quality have weld number 4, where was not detected any defect root was welded and is without pores, bubbles or cranks.

Most monomers employed, however, can rarely enter into wood cell wall to react with hydroxyl groups and just polymerize in wood cell lumen without grafting with wood matrix, which results in weak chemical combination between the two phases and large numbers of hydroxyl groups still available.
The end grain of sample was cut with a surgical blade and the sample was mounted on sample holder with a double-sided adhesive tape, gold sputter-coated.
Figure 2 also shows that the peak of the modified wood at 1733cm-1 for carbonyl stretching vibration is enhanced as compared to the corresponding untreated wood, indicating the number increasing of carbonyl groups in wood components.
According to the reaction mechanism, it is reasonably believed that the increasing numbers of carbonyl groups should be attributed to the reaction of wood components with GMA/EGDMA.

The crystallinity, the grain boundaries and the surface roughness depend critically on the irradiation process.
The SEM micrographs in Fig. 5a show the surface morphology with a granular structure that changes from densely packed crystal grains, characterized by visible grain boundaries with an average size between 25 and 100 nm in the as-grown film, to grains with less smooth and less distinct surfaces and boundaries after bombardment.
It is clear from these images that the grain morphology and roughness change as a result of irradiation with 5 keV H2+ ions.
In addition, the SEM cross-sectional images reveal less pronounced grain boundaries after the bombardment process, which can also be seen in the SEM surface images in Fig. 5a.
Acknowledgement The research leading to these results has received funding from the core fundings NPOO.C3.2.R2-I1.06.0083 supported by the European Union NextGenerationEU and project numbers 23-190 and 23-4 supported by the University of Rijeka References [1] R.

The anodic dissolution mechanism is that the local plastic deformation develops to a critical state due to corrosion, and the stress concentration in the local region is equal to the atomic bonding force, resulting in the nucleation of micro-cracks, which then expand in cleavage or along the grain boundary, resulting in low stress brittle fracture.
A large number of studies have shown that the addition of precious metal elements Pd, Ru and Mo can significantly improve the stress corrosion resistance of titanium alloys [13, 14].
In addition, the strength and toughness of titanium alloy can be improved by adjusting the miro-structure the grain size of the titanium alloy; the fracture toughness of titanium alloy is affected by secondary α2 Lamellae size and Ti3Al particles in nascent α grains.
Among them, secondary α lamella coarsening can improve the toughness of the titanium alloy, however, Ti3Al particles in nascent α grains can improve the strength of the material and reduce its toughness [27, 28]. the grain size of original β has little effect on the strength of aged titanium alloy, but the increase of grain size reduces the fracture toughness of titanium alloy; and the reduction of the aspect ratio of the α phase is beneficial to the improvement of the fracture toughness of titanium alloy [29].

The growing number of scientific papers on hydrothermal synthesis of ceramic powders, which almost quadrupled between 2000 and 2004 (Fig. 1a), illustrates the rising interest in this area, with China, Japan, and USA publishing most extensively (Fig. 1b).
(a) Number of papers on hydrothermal processing of ceramic powders published between 1989-2005 vs. all materials science-related papers on hydrothermal technology [4]; (b) geographical distribution of the research on hydrothermal processing of ceramic powders (1989-2005).
Sawyer's products line of the ĮAl2O3 powders called DiamoCor, comprises both undoped and Mn or Cr-doped compositions with the following grain sizes: 40 ȝm, 20-25 ȝm, 10 ȝm, 6 ȝm, 3 ȝm, 1 ȝm, and 100-250 nm.
Representative corundum powders with a 10 ȝm grain size are shown in Fig. 6a.
The picture reveals typical as-synthesized powder, with uniform particle size distribution and well-defined crystal faces in each grain, which is a single crystal of the Į-Al2O3 phase.

Geometric parameters in the analog model (size, number, inhomogeneity of pores, shape of inclusions, etc.) were assigned taking into account experimental data on the investigations of the SLAC and NWC macrostructure.
Physical parameters (strength, modulus of elasticity, etc.) were set for inclusions in the form of equations у = f(rm), obtained by correlation analysis, and for the matrix – у = f[C; (W/C)tr; Rc] obtained by experimental planning methods (here y is the property under researches, rm is the average grain density of the coarse aggregate, kg/m3; C is the concentration of hardened cement paste in mortar, rel. units.; (W/C)tr – true water-cement ratio of concrete, rel. units; W – mixing water of concrete mix minus water absorbed by porous aggregate; Rc – cement activity, MPa).
Influence of the macrostructure parameters (n) of SLAC and equal strength NWC on the strength (q) under axial compression, based on the results of computational experiments. 1 – inhomogeneity of SLAC inclusions; 1’ – inhomogeneity of NWC inclusions; 2 – strength of the SLAC contact zone; 2’ – strength of the NWC contact zone; 3 – width of the SLAC contact zone; 4, 5 – respectively the coefficient of the of the SLAC aggregate grains shape and their size; 6 – pore size of SLAC cement matrix; 6’ – pore size of NWC cement matrix; 7 – pore volume of SLAC.
Based on the results of the figure 1 review, with the use of the ranking method, which is one of the most effective methods of expert analysis, it is possible to estimate the efficiency of the influence indicators of concrete macrostructure various parameters on its strength and frost resistance consequently in order to reduce the value of these indicators: the strength of the contact zone of the hardened cement paste (HCP) and coarse aggregate, the grain size of coarse aggregate (inclusions), the pores size and their volume in concrete body, heterogeneity of inclusions.
The test base – the number of concrete freezing and thawing cycles was selected no more than 10, based on the actual operating conditions of reinforced concrete tanks for storing liquefied natural gases (LNG): filling of LNG into tanks for loading into gas tankers, possible partial or complete emptying of tanks if necessary for repair work.

It was found that the molten Cu accelerating the decomposition of Ti3AlC2, inducing the interfacial exfoliation to generate, and forming a sub-micro-layered structure making up of TiCx layers and Cu-Al alloy layers within a Ti3AlC2 grain.
Because the good ductility of the Cu-Al alloy, the meshes of the net were elongated along the direction of tensile stress, and consequently formed a larger number of dimples on the fracture surface.