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Tantalum in the RAFM steel plays an important role in lowering DBTT through its effect on prior-austenitic grain refinement [3].
Peak tensile stress at the half-life (i.e. at half of the number of cycles to failure) was taken as saturation or half-life stress and the cycle number corresponding to a drop of 20 % from the half-life stress was defined as fatigue life.
A comparison of fractographs of the samples tested at ambient and 823 K (550oC) temperatures indicates comparatively larger number of crack initiating sites at elevated temperatures, as illustrated in Fig. 5 (a) and (b).

Table 1 Experimental materials and proportion Experiment number coating Coating amount (g) Filler type Filler content (g) 1 Nitro coating 3 Nano TiO2 0 2 0.01 3 0.05 4 0.1 1.2 Preparation of composite coatings (1) in Table 1 shows the experimental ratio were known from the need of nano TiO2 content, and said from the same batch of experimental conditions for the NC coating quality, disposable plastic cup containing, the different proportion of nanometer TiO2 powder added slowly to NC coating (nitro paint), and the magnetic stirrer 45 DEG C under high speed stirring for 1 h, then to 70% of the power ultrasonic 10min, nano TiO2 fully dispersed in the NC coating, then use the pressure ejection of the mixed coating attached to the surface of the substrate (reference standard 98PSI, Japan), the film thickness of about 50 m. the base Material at room temperature and ventilated place dry 24h, set aside
Subsequent research will consider using surface modification agent of nanometer TiO2 surface was modified to increase its in nitro paint evenly dispersed, thereby Step to improve the wear resistance of the coating. 2.2 Effect of nanometer titanium dioxide on adhesion and hardness of coating film Table 2 Effection of nano-TiO2 on the adhesion and hardness of the coatings Experiment number 1 2 3 4 adhesion 1 1 1 1 Pencil hardness 2B 2B 2B 2B From table 2 can be seen, nano titanium dioxide added amount had no significant influence on the adhesion and hardness of the film, adhesion were grade 1 and hardness are 2B.
Nano TiO2 didn't join the both inside and outside of the film stress adverse effects, and the surface of a large number of hydroxyl groups and unsaturated residual bond in the film drying process , and coatings can be reactive group forms a hydrogen bond with the double bond cross-linking and keep the excellent adhesion level.
Without adding TiO2 nanoparticles, cross grain and Shun print gloss is 46%.

Cylinder and measuring point’s number are shown in Fig. 2.
The number of residual stress in each side of top or bottom has decreased gradually in first three cylinders.
Oppositely, this trend was moved towards the contrary direction: There is a rapid increase in the number of residual stress in cylinder D.
The impact of variations in casting practice on grain size and stress level is envisaged for future studies.

Over the years, investigators tried to obtain accurate material characteristics under high impact loading with various experimental methods and come up with a number of material constitutive equations.
In order to obtain the material characteristics under high strain rate, a number of test methods have been proposed, one of which is using a Split-Hopkinson Pressure Bar (SHPB).
A number of common structural steels were selected for SHPB tests, i.e.
From various literatures, these effects are described as a result of grain internal friction during high strain rate deformation.

DV-Hop is a range-free and distributed node localization scheme, and its primary localization elements are average hop-size and number of hop counts.
Some necessary formulae are given as follows: , and, and (6) , and , (7) where n is the number of beacons attending the unknown node’s position derivation.
The number of beacons participating in each unknown node’s position derivation is fixed as 4, and each unknown node uses the nearest 4 beacons’ information to implement the localization scheme.
Strivastava: “Dynamic fine-grained localization in ad-hoc networks of sensors,” in: Proc. of MOBICOM, ACM, Rome, Italy( 2001), p. 166-179

According to the particles theory and the compact stack model, DSP is a kind of high close-grained material through the particles reasonably accumulating and the chemical reactions in particles, and composed of 70~80% cement, 20~30% ultrafine materials smaller than cement by l~2 orders of magnitude, super-plasticizer and water.
On the other hand, ultrafine particles such as silicon ash and nano-silicon can fill the interface pores, modify the pore structure and improve the adhesion strength and the durability of the cement stone interface, and a large number of C-S-H gel can also make the constituents bond closely, which can reduce the weakness of the interfaces and improve the density of the interfaces.
Table 1 Compressive strength of the samples Specimen no Compressive strength of grout /MPa Uniaxial compressive strength of limestone/MPa 7d 28d Saturated state Natural state R-10 66.23 118.54 82.29 102.60 R-15 64.01 R-20 66.25 D-10 96.00 121.00 D-15 84.58 D-20 92.30 In the specimen number, R and D stand for RPC and DSP respectively; 10, 15 and 20 are grouting depths (unit is cm); The limestone sample is a standard cylinder of diameter 55 mm and high 110 mm.
Table 2 Pull-out test results on bonding properties Specimen group no Compressive strength of grout /MPa Bonding strength /MPa Bonding stress /MPa 7d 28d R-10 66.23 112.54 31.39 8.37 R-15 64.01 30.19 8.05 R-20 66.25 31.43 8.38 D-10 96.00 121.00 28.58 7.62 D-15 84.58 23.25 6.20 D-20 92.30 28.01 7.47 In Tab.2, bonding strengthis the bonding strength between the grout and the rebar, is the bonding stress between the grout and the limestone when the interface between the grout and the rebar damaged; In the specimen number, R and D stand for RPC and DSP respectively, 10, 15 and 20 are grouting depths (unit is cm) At present, in the rock anchor project pure cement paste and cement mortar are commonly used as grouting mediums, and as to these two kinds of material, the Yangtze river academy of sciences has done a great deal of experiments combining with the Three Gorges Project[5], and the results of the experiments are shown in Tab.3.

Table 1 Sand testing results Fineness modulus Cl- content Mud content Clay content 2.7 0.006% 0.1% 0.2% The gravel used consisted of size varying between 5mm and 10mm in diameter, and it was the grain of granite. 2.1.3 Superplasticizer A polycarboxylate-based superplasticizer was used for all concrete mixes.
As to the ratio of two kinds of cements, it was also set to be a fixed number.
Conclusions 1) The proposed orthogonal experiment method in concrete mix proportion design has the capacity to reduce the number of trial and error, save cost, laborers and time.
In the meanwhile, the appropriate result is attainable. 2) A number of parameters have impacts on compressive strength and workability of concrete, for example, water-cement ratio, aggregate size, mud content of aggregate, etc., among which the dominant ones selected as factors are water-cement ratio, cement content, superplasticizer content and sand ratio. 3) Cement content and sand ratio are the most influential factors on slump and 10h compressive strength, respectively. 4) An optimized concrete mix for precast concrete members in building industrialization is determined. 5) The research of long-term properties of the optimized concrete mix is planned to be carried out in the future.

Secondly, as for the evaluation index of liquefaction resistance, the relationship between maximum shear stress and (number of cycles needed for liquefaction) was commonly used.
Physical properties of tested soil Soil type Void ratio Specific gravity Relative density Particle size distribution Gs Dr D10 D50 D90 Cu Fujian sand 0.751 2.644 30% 0.17 0.23 0.50 1.47 Fig.5 Grain-size distribution of tested soil Test Plans.
Control parameters of each sample Type Sample number Dr CSR [kPa] [deg] T T-1 28.1% 0.26 16.12 - 6 T-2 27.9% 0.22 13.64 - 15 N N-1 28% 0.13 8.06 - 240 N-2 28.2% 0.18 11.16 - 89 N-3 27.5% 0.2 12.4 - 40 C C-1 27.5% 0.15 8.99 - 12 C-2 27.9% 0.13 8.06 - 17 E E-1 28.1% 0.14 8.47 -30 102 E-2 27% 0.16 9.80 -30 53 E-3 27.5% 0.18 11.16 -30 24 E-4 26.6% 0.09 5.58 0 510 E-5 27.7% 0.13 8.06 0 66 E-6 27.1% 0.16 9.92 0 30 E-7 26.9% 0.11 6.94 30 285 E-8 27.6% 0.14 8.47 30 116 E-9 27.6% 0.18 11.16 30 13 E-10 27.2% 0.16 9.92 60 41 E-11 26.8% 0.24 14.76 60 5 E-12 27.6% 0.13 8.06 90 98 E-13 27% 0.16 9.92 90 23 Test Results and Analysis Liquefaction Criteria and Test Results.
In this paper, the dynamic testing results of different stress paths clearly showed the relationship between CSR and number of cycles to cause liquefaction in semi-log coordinate could be represented by a straight line approximately, but different dynamic stress paths led to different characteristic lines.

Paper elasticity parameters are studied and described in a number of publications [6–9].
On the surface of the test specimen, small (150–180 μm) grains of silicon carbide abrasive were poured for visualization of standing wave nodal lines.
Variable is the number of design variables .
The number of natural frequencies in objective function is .

Journal Title and Volume Number (to be inserted by the publisher) Figure 1 - X-ray diffraction patterns of elemental (a) Ta-33.3%Si and (b) Ta-66.6%Si powder mixtures at various milling times.
The formation of nanocrystalline phases with a grain size of 10-30 nm was observed when high-energy milling was employed.
Figure 4 - TEM bright-field images and corresponding selected area electron diffraction patterns of powder (a) Ta-33.3%Si and (b) Ta-66.6%Si samples milled for 40 h. 40 h (a) (b) (c) (d) (h) (g) (e) (f) 10 µm 100 µm 20 µm 20 µm 100 µm 100 µm 100 µm 30 µm 50 nm 200 µm 20 µm 50 nm (a) (b) Journal Title and Volume Number (to be inserted by the publisher) Figure 5 - DSC curves of (a) Ta-25%Si, (b) Ta-33.3%Si, (c) Ta-37.5%Si and (d) Ta-66.6%Si powders after milling for 40 h.
Kim: Scripta Materiallia Vol. 44 (2001), pp. 97. 30 40 50 60 70 900°C / 1 h Intensity (cps) 2θ 1100°C / 1 h Ta Ta5Si3 1100°C /1 h 30 40 50 60 70 Intensity (cps) 2θ 900°C / 1 min. 700°C / 1 min. 1200°C / 1 h TaSi2 Ta5Si3 1200°C / 1 h (a) (b) 900°C / 1 min. 700°C / 1min. 900°C / 1 min. 1100°C / 1 h 30 40 50 60 70 30 40 50 60 70 2θ 2θ Journal Title and Volume Number (to be inserted by the publisher) [14] G.V.