Search results

The tuff sandstone is fine-coarse grained and brownish yellow in color.
Furthermore, determine depth of every anomaly with an analysis spectrum in one dimensions and use fourier transform with change signal to summation a number of signals[7].
Analysis method spectrum change to in row fourier distance/space domain become number wave or frequency for get k and Ln A values.

Therefore it decreases or completely eliminates the number of sub-components and joining operations.
It has been demonstrated by a number of researchers [35, 36] that SPF can be effectively combined with other sheet forming processes.
For example, pre-machining or grain refinement of selected regions of the undeformed sheer prior to SPF can be used to improve the thickness uniformity.

A number of studies in both vitro and vivo showed that YSE can decrease ruminal ammonia levels and increase propionate concentration[4], inhibit methane production[5], alter the rumen microflora in vivo.
Average daily gain was improved by finishing steers fed high-grain diets supplemented with YSE.
Numbers of protozoa were counted using a Fuchs-Rosenthal counting chamber.

Great deal of efforts have already been paid to realize metastable phase of Cu by precipitation in Fe-Cu [4,5], by epitaxial growth on Fe substrates [6,7] or by grain boundary effect of bicrystal [8].
A simple way to estimate the discreteness of the electronic states in the precipitate is to count the number of electrons filling the FS.
The FS volume of monovalent metal is given by:
� � �
� � � � � � 
, where N is the number of atoms in the volume V.

Skarn sulfide ore bodies occur in the contact zone between porphyritic or grained biotite granite rock mass and carbonate rocks of the lower Gejiu Formation; this type of deposit is dominated by Sn and Cu mineralization, which is the largest type in the Laochang ore field.
Fig.4 The number of existing ore bodies in different strata With the solid models of strata and existing ore bodies, statistical results show that there are 0, 0, 0, 0, 0, 0, 65, 792, 1277, 1704, 2044 and 3077 deep mineralization cell blocks respectively in T2g32, T2g31, T2g24, T2g23, T2g22, T2g21, T2g16, T2g15, T2g14, T2g13, T2g12 and T2g11 (Fig. 4).
Statistics should be carried out on the number of cubic blocks with high value of information in each target and then each target should be named as As3-1, As3-2, As3-3, Bs2-1, Bs2-2, Cs5-1, Cs5-2, Cs5-3, Cs5-4 and Cs5-5 (s marks deep ore body, A, B and C represent prospecting potential grade of targets in decreasing sequence) (Fig. 9 and Fig. 10) , based on the prospecting potential grade.

In the case of wet abrasion condition, contact area between ball and sample surface has been supplied with a suspension of SiC with an average grain size of 4 in distilled water having a concentration of 50 ml SiC/173ml H2O for increased abrasion action.
As in any wear test, there are a large number of parameters that affect the results of ball cratering test.
Hence, there are a number of possible mechanisms of micro-abrasion.

Mingli Huang[10] etc take account of the influence of different grain sizes and distribution of the flaws on the propagation process of cracks in rock, then a mathematical model is established.
Their physical meanings and roles are the bulk modulus, controlling cunctative elastic numbers, elastic shear modulus, determining cunctative elastic velocity and viscous flowing velocity respectively
Model establishment The actual size of the sample is based on the laboratory test, as shown in Figure 2, we establish cylinder model and divide it into grid, the origin of coordinates is built on the model where is axial and radial of the midpoint location, then the unit of the longest side is less than 2mm, the number of unit is 62400 and nodes is 63125.

Coupled with low density, there are a number of virtues to stimulate their widespread application in aviation, aerospace, machinery and automobile field, including high strength-to-weight ratio, favorable corrosion resistance and easy implement of moulding [[] F.M.
Zhang et al. [[] X P Zhang, Y J Ren, Z Sun in: Journal of China University of Mining and Technology(English Edition), 2006, 16(4): 475-479. ] studied the influence of grain refining and metamorphism to mechanical properties, and analyzed several effective factors in the modification process.
K Maximum load Pmax [kN] Minimum load Pmin [kN] Resonant frequency f [Hz] Cycle N Remarks 1 0.6 16.74 1.67 107.6 74671 Fracture failure 2 0.6 16.74 1.67 92.2 43767 Fracture failure 3 0.5 13.95 1.40 105.7 159170 Fracture failure 4 0.5 13.95 1.40 93.2 75311 Fracture failure 5 0.4 11.16 1.12 103.4 246610 Fracture failure 6 0.35 9.77 0.98 104 234815 Fracture failure 7 0.35 9.77 0.98 100.1 442317 Uneven fracture 8 0.32 8.93 0.89 103.6 484154 Fracture failure 9 0.32 8.93 0.89 98.5 2×106 Not broken 10 0.32 8.93 0.89 100 507048 Fracture failure 11 0.315 8.79 0.88 95.2 482316 Micropore on fracture surface 12 0.315 8.79 0.88 97.2 2×106 Not broken 13 0.31 8.65 0.87 102.3 1452337 Fracture failure 14 0.31 8.65 0.87 94.2 2×106 Not broken 15 0.3 8.37 0.84 99.9 2×106 Not broken 16 0.3 8.37 0.84 97.5 2×106 Not broken By using maximum stress S=σmax=Pmax/A and cycle number N as vertical and horizontal coordinate respectively, power function is recommended as fitting formula

Moreover, the input line energy increases, increased weld width, resulting in heat zone of welded seam grains become crassitude, carbide and the low melting point eutectic material is relatively increased, so that reducing the mechanical properties.
Table 1 Chemical composition of experiment materials Materials C Si S P Mn Ni Cr Ti Fe Austenitic stainless steel 304 0.07 0.66 0.017 0.032 0.093 8.1-10.10 17.0-19.0 0.39 other Table 2 Main laser welding parameter Serial number number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Power (W) 400 500 500 500 500 500 500 500 500 500 500 500 500 500 500 Pulse width (ms) 3 3 3 3 2 2 3 3 3 3 1 2 3 4 5 Frequency (Hz) 8 10 10 10 8 8 9 9 8 14 10 10 10 10 10 Welding speed (mm/min) 60 30 60 90 30 200 10 30 30 30 200 200 200 200 200 Defocus (mm) -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 Firstly, the macro-morphology of the weld was observed to determine the welding quality good or bad.

Suppose the bubble numbers in the slurry with a depth hc is n0, the remained bubble number after filling the mold cavity with a depth hm is ne, the remained bubble ratio formed in the workpiece is defined as the following formula(19)
Flemings, Grain refinement of an aluminum alloy by introducing gas bubbles during solidification, J.