Search results

Abstract: Study on the effect of liquefaction mechanism on the performance of ECC, adding rubber powder mesh size effect on the performance of ECC, respectively, to 40 mesh, 60 mesh, 80 mesh and 100 orders at the same content of rubber powder and 40 mesh in different dosage on ECC compressive strength, flexural toughness was analyzed, results show that: the use of the mechanism of liquefaction of mixing rubber powder in cement based materials, with the increase of ECC number increased ductility, at the same time reduce the compressive strength is larger, rubber powder content in 12%, the comprehensive effect is ideal.
Sand: the sand grain size is 0.22~0.37mm.
a) b) Figure 2.a) Compressive strength of G1~G4 b) Compressive strength of G1‘~G4‘ Conclusion 1) the liquefaction mechanism to adjust the ECC ratio, thus liquidity or cement matrix and reducing segregation, achieve high ductility cementitious matrix and multiple cracks and thus more easily. 2) rubber powder mixed with larger mesh size, compared to the number of small can more easily achieve ECC high ductility, but the maximum carrying capacity is greatly reduced, the compressive strength has greatly decreased; with the increase of rubber powder mesh, ECC corresponding improved ductility.

In the annealed specimen, relatively large particles of Fe16N2 were formed with low number density, while in the deformed specimens, dislocation substructures due to cold rolling were disappeared by ion-implantation and fine particles were densely formed.
Number density of the �" particles in (b), cold rolled with 90 %, is obviously higher than that in (a), annealed specimen.
On the other hand, in the annealed specimen, interstitial iron atoms firstly diffuse to sinks, such as surface and grain boundaries, remaining vacancies and nitrogen atoms.

A large number of microorganisms are capable of reducing ferric iron and are widely distributed in many environments [1, 2].
Biological iron reduction has been shown to occur with a number of oxidized or partially oxidized iron compounds such as magnetite and various Fe(III)oxyhydroxides.
The samples have an average grain size diameter of about 0.1 mm and the pH(s) were circumneutral with values around 7.5.
DNA copy numbers per g dry weight obtained with qPCR quantification of 16S rRNA genes of Bacteria, Archaea and Geobacteraceae.
Conclusions Both, Archaea and Bacteria are present in similar numbers in the nickel lateritic ore deposit.

Each crystalline was then marked and the total number of crystals was counted using software.
The density of the crystals i.e. the average number of crystals per square micron was then calculated.
Variations in size and number of crystals are presented in Fig. 4.
From which we can see clearly: (1) when the Ua is less than 220V, the crystal size decreases rapidly with the increase of Ua and when the Ua is over 220V, the size of crystals increases slightly with the increase of Ua; and (2) with the increase of Ua, the crystal number increases rapidly when the Ua is less than 220V and the number decreases when the Ua is over 220V.
It is speculated that the melt-quenched titania crystallizes into grains and converts to anatase, and subsequently to rutile by virtue of local high temperature–pressure sintering in the proceeding microarc discharging.

Table 1 The formula of ABS (wt%) inorganic particle 0% 5% 10% 15% 20% number 0 1-1 2-1 3-1 4-1 ABS: Al2O3 100:0 100:5 100:10 100:15 100:20 number 1-2 2-2 3-2 4-2 ABS: Talcum powder 100:5 100:10 100:15 100:20 number 1-3 2-3 3-3 4-4 ABS: Kaolin 100:5 100:10 100:15 100:20 number 1-4 2-4 3-4 4-5 ABS: CaCO3 100:5 100:10 100:15 100:20 The modified ABS materials were made into 3D printing silk according single screw extruder after drying in drying oven in 80℃ for 4h.
That would increase the number of material defects and damage the compactness of the matrix and decrease the strength.
The load will directly concentrate on the inorganic particles and caused small silver grains (cracks) When the added inorganic particles are larger than the diameter of the matrix resin, which resulting in the increase of brittleness of the material and the decrease of toughness.
Round and smooth AL2O3 particles occupied a large number of dimple centers.

Welding is known to create tensile residual stresses, promote grain growth, recrystallisation and softening in the heat-affected zone (HAZ) [6,7], and to introduce defects that act as stress concentrations and preferential crack initiation sites.
A frequency of 1 Hz was used for all fatigue tests and the number of cycles to failure (N) was recorded for each specimen.
The number of cycles to failure (N) was recorded for each stress range (Ds) at the end of the test.
The HAZ and weld metal, characterised by large grain sizes and coarse second phase particles, were therefore found to be more prone to pitting than the base material [16].
As expected, the number of cycles to failure (N) increases with a decrease in the applied stress range (Ds).

Optical observation windows are provided on either sides of the experimental model so to take pictures of the test images and grains.
Mach numbers of 2.5 and 3.0 in the experiment should correspond to Mach numbers of 4.1 and 5.3 in flight status.
This paper only compares and analyze the data generated from numerical simulations at Mach number 2.5.
Figure 6 shows the Mach number distribution under various turbulence models.
Figure. 6 Mach number distribution of various turbulence models All turbulence model computations predict very well the development trend of the shock wave system along the tunnel.

However, danger of contention increases when the mesh is very small compared to the number of threads operating on it.
Thus it needs to elastically adjust thread number according to mesh size and the number of 3D feature points so that it can get the highest speedup.
The whole points cloud is divided into several regions according to the number of processors of the platform then assign each region to each processor.
To solve this problem, the platform is designed to elastically decide parallel grain.
From our experiments, when the number of points assigned to one processor is less than 2,000, time waste of thread operation cannot be ignored.

The available literature data indicate only that the superposition of high frequency low amplitude vibrations on LCF loading may be both negative and positive as regards the number of LCF cycles to failure.
The average grain size determined by linear intercept method was 3 ± 0.5 mm.
However, light microscopy observation revealed number of casting defects on metallographically polished surface.
The fatigue life is expressed in terms of the number of HCF cycles spent at the mean stress of 300 MPa.
Strong effect of casting defects on the fatigue lifetime resulting in large scatter of number of cycles to fracture was observed. 3.

If it could predict the general deformation of a given point based on the current condition, inevitably reduce the number of approach times and system response time, reduce vibration, improve dynamic performance of the system.
The first layer is input layer, in this layer each node directly connecting each component xi of input vector. the input features value or the unitary value of the characteristics, if the parameters have n, then, the number of nodes on the first floor for n.
So the number of nodes in the layer is N = 3.
The third layer is rules layer[5].Each node of the third layer which is on behalf of a fuzzy reasoning rules, its role is to match the fuzzy rules, calculate each of the applicable rules, each nerve represent a fuzzy rule, so the number of nodes in the layer is N = 12.This layer introduce "and" operate. )()( )3()3( xxIO i i B A ii µµ •== (3) For the ith rule,x1 have m input expressions, x2 have n input expressions, then )2( 2 )2( 1 )3()3( nm ii OOIO •== (4) The fourth layer is anti-fuzzy layer, which express the fuzzy reasoning output with a specific method, which is clear output, the number of nodes of this layer equal to the number of the output.
Third International Conference on, 2010,pp:447 - 450 [4] Jianjun Wu，The Research and Design of the Grain Monitor and Control System Based on Fuzzy Neural Network，IT in Medicine and Education, 2008.