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Online since: June 2014
Authors: Jin Gen Deng, Zhuo Chen, Qing Hua Sun, Yong Meng Xu, Heng Lin Yang, Hai Long Liu
Table 1 Analysis on total rock samples minerals of Bachu formation(Lu Yunhu,2011) serial number Interval(m) lithology mineral type and content(%) total Clay mineral content (%) quartz potassium feldspar anorthose calcite dolomite 1 6/40 5686-5692 mudstone 27.7 2.6 10.4 15.3 8.2 35.8 1 14/40 27 0.8 12.1 19.7 6.1 34.4 1 22/40 23.4 1.1 6.3 11.9 6.7 50.6 Table 2 Analysis on clay minerals relative content of Bachu formation(Lu Yunhu,2011) serial number Interval(m) lithology relative contents of clay minerals (%) mixed-layer ratio (%S) S I/S I K C C/S I/S C/S 1 6/40 5686-5692 mudstone / / 54 4 13 29 / 50 1 14/40 / / 69 5 17 9 / 40 1 22/40 / / 70 6 22 2 / 40 Experimental Scheme Use CT tomography technology to describe the formation process of crack network with mudstone deformation under load, then analysis the formation and development characteristics of crack network around the wellbore within different drilling fluids, and reveal mesoscopic damage mechanics effect of rock around the
Record the CT number in different scanning layers under different stress state, analysis the relationship between the formation process of cracks network around the wellbore under different stress state and CT number, and take advantage of CT reconstruction technique to form three-dimensional stereogram showing the space distribution of crack network in rock.
The drilling fluid filtrates into the pore and along the bedding plane of rock, and because of large clay content in the shale mineral grains or the filler in bedding plane, a potentially high chemical reactivity with drilling fluid will occur.
Online since: December 2006
Authors: De Jun Kong, Jin Zhon Lu, Yong Kang Zhang, Su Min Yin, Jian Zhong Zhou, Ai Xin Feng
If the shield is formed as there are some metal grains in coat, the identifier is not detected.
The second part of data is characteristic code, each product contains an unique characteristic code, it may be product serial number, product date, producer number and serial number of product quantity and so on.
Fritz: Identification Marking by Means of Laser Peening, Patent Number Wo0161619, (2001)
Online since: June 2011
Authors: Claude Bathias, E. Bayraktar, Hong Qian Xue
Conventional concept of the metal fatigue shows us that a fatigue limit is found at the number of stress cycles around 107 cycles.
However, fatigue tests in the long life regime require a long period and it is difficult to obtain the sufficient number of fatigue data by using conventional testing machine, although, ultrasonic fatigue testing machine as an effective and reliable way has been widely used in investigating fatigue behavior of materials in very high cycle regime [5-6], however, much of the available ultrasonic fatigue properties today are axial loading, some fatigue criterions can be used in predicting the torsion fatigue behavior using the axial fatigue strength[7,8], however, the torsion fatigue test is the best way to obtain the torsion fatigue properties.
The average grain is 10mm, a little fine pore (no more than 5μm) are finely dispersed in the microstructure.
Cyclic numbers, maximum stress and testing frequency continuously recorded by the test control software.
The topography of the fracture surfaces were found to have shrinkage pores at the subsurface of specimen, in the vicinity of crack origin, a zone with a number of pores exist.
Online since: June 2010
Authors: Lei Wang, Yong Qing Zhao, Teng Yu, Yang Liu
It can be seen that both the NTE and TE specimen are bi-modal microstructure, consisting of equiaxed primary α phase (αp) in a lamellar α+β matrix (transformed β phase, βT), for which the volume fraction of αp phase is about 20%, and average grain size of the αp phase is about 15 µm.
Plotted in the figure are the cyclic stress amplitude vs. the number of cycles at different constant total strain ranges, typically being ±0.45%, ±0.50%, ±0.60%, ±0.70%, ±0.80% and ±1.00%.
The total strain amplitude as a function of the cyclic number to failure for the NTE specimens and the TE specimens are plotted in Fig. 4.
For instance, the cyclic number to failure of the NTE specimen and the TE specimen, within a constant total strain amplitude ±0.60%, are 2114 and 3688, respectively.
From Fig. 6 (a) and (b), it can be noticed that "A", "B" and "C" are the fatigue failure originated region, the crack propagation region and the final rupture region, 100 10 1 10 2 103 10 4 10 5 600 650 700 750 800 850 900 950 1000 1050 1100 1.00 0.80 0.70 0.60 0.50 0.45 Cyclic Stress Amplitude/MPa *umber of Cycles, � TE ± ∆εt /2 (%) 10 0 10 1 10 2 10 3 10 4 10 5 600 650 700 750 800 850 900 950 1000 1050 1100 NTE ± ∆εt /2 (%) 1.00 0.80 0.70 0.60 0.50 0.45 Cyclic Stress Amplitude/MPa *umber of Cycles, � Fig. 3 Stress response to cyclic straining of Ti600 alloy before and after thermal exposure (a) NTE; (b) TE (a) (b) 10 2 10 3 104 105 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 Total strain amplitude, ∆∆∆∆εεεεt/2 /% Cyclic number to failure, �f NTE TE Fig. 4 Fatigue life curves of Ti600 alloy before and after thermal exposure respectively.
Online since: January 2013
Authors: Shu Guang Liu, Jian Guo Sun
Average diameter of rape seed is 1.23mm, and 1000-grain weight is 3.6149g.
(1) Where, —average sowing amount of each section, g;Xi—sowing amount of each section (average of 4 times), g;S1—standard deviation, g;n—number of section in the lines;v1—CV of seeding uniformity in the lines, % CV of Seeding Consistency between the Lines.
(2) Where, —average sowing amount of each lines, g; Yi—sowing amount of each lines(average of 4 times), g; S2—standard deviation, g; m—number of rows; v2—CV of seeding consistency between the lines, % CV of Seeding Rate Stability.
(3) Where, —average of seeding rate, g; Zi—seeding rate of each test(average of 4 times), g; S— standard deviation, g; p—test number; V—CV of seeding rate stability, % Test Program and Test Results The test selects motion velocity and rotate velocity as test factors by two factors quadratic orthogonal rotational combination design.
Table 2 Result test of the two factors quadratic orthogonal rotational combination design Number Test program Test results x0 x1 x2 x1 x2 x1' x2' v1 (%) v2 (%) V (%) 1 1 1 1 1 0.5 0.5 4.97 2.85 1.38 2 1 1 -1 -1 0.5 0.5 4.46 2.47 1.34 3 1 -1 1 -1 0.5 0.5 5.37 2.94 1.56 4 1 -1 -1 1 0.5 0.5 3.65 1.72 0.81 5 1 1.414 0 0 1.5 0.5 4.88 2.64 1.41 6 1 -1.414 0 0 1.5 0.5 4.31 2.41 1.14 7 1 0 1.414 0 -0.5 1.5 4.99 3.07 1.41 8 1 0 -1.414 0 -0.5 1.5 3.54 2.23 0.95 9 1 0 0 0 -0.5 -0.5 4.11 2.21 0.96 10 1 0 0 0 -0.5 -0.5 3.97 2.16 1.02 11 1 0 0 0 -0.5 -0.5 4.15 2.28 0.99 12 1 0 0 0 -0.5 -0.5 4.09 2.29 0.89 13 1 0 0 0 -0.5 -0.5 3.91 2.07 0.94 14 1 0 0 0 -0.5 -0.5 4.19 2.14 1.07 15 1 0 0 0 -0.5 -0.5 3.92 2.32 1.11 16 1 0 0 0 -0.5 -0.5 4.11 2.35 0.94 By Fig.3(a), within motion velocity range at 0.8m/s-1.8m/s and rotate velocity range at 20r/min-60r/min, the minimum amount of CV of seeding uniformity in the lines is 3.0996% and the maximum amount is 5.8912%
Online since: March 2008
Authors: Yong Yu Zhang, Ling Sha, Xiao Yang Chen
When a cyclic loading of 1µN.µm was exerted to the micromachining flexure hinge, the limit stress alternation number exceed 1.0×10 8.
When the stress alternation number exceeded 1.0×10 9, the polysilicon beam of microactuator would lost its elastic character.
In addition, the micro grain cannot be produced because there is no wear.
When cyclic loading of 1µN.µm was exerted to the thin film flexure hinge, the limit stress alternation number exceed 1.0×10 8.
When the stress alternation number exceeded 1.0×10 9, the polysilicon beam of the microactuator lost its elastic character as shown in Figure 9.
Online since: March 2013
Authors: Tie Tao Zhou, Li Li Zhao, Lv Ming Yang, Qing Qing Zhang
In the present study, uniaxial tensile test of aluminum alloy casting containing defects was simulated and analysed, and the effect of types and number of defects on mechanical properties was studied by finite element analysis software.
The number of pores and oxides is in equal portion in the defects d) In order to study the influence of different defects in shape to mechanics properties of aluminum alloy castings, this paper use circular, square and rectangular approximate to simulate the casting defect and establish aluminum alloy casting uniaxial tensile test finite element model under the conditions of the defect rate in 3% based on the statistical results.
Although the number of pores is less than that of oxides based on the simulation results, just as oxides, pores could be observed in Aluminum ally castings with degassing or not.
The oxidation inclusion's increases improve the tensile strength of casting in some way, when the number of pores and oxides is in equal portion in the defects, along with the increase of the defect, the tensile strength of casting increases slightly.
SIMULATION OF COARSE-GRAINED LY-12 QUASI-SUPERPLASTIC UNIAXIAL TENSION.
Online since: August 2017
Authors: Cecilia Demergasso, Pedro A. Galleguillos, Dina Cautivo, Ivan Nancucheo, Víctor J. Zepeda, C. Colipai, Milton Guillen, Enrique Becerra, Camila Escuti, Daniella González
Most of these tailings are fine-grained residues with low copper content (0.1-0.8%) and include toxic compounds, such as heavy metals, arsenic, and flotation reagents, amongst others.
A similar decrease in cell numbers has been previously reported [15].
Key: (▲) copper soluble in the offline trap, (■) numbers of planktonic-phase microorganisms and (●) glycerol in the sulfidogenic vessel.
Online since: September 2012
Authors: Xi Tao Zheng, Zhen Yan, Tao Chi, Kun Yang
It could handle distributed deployment, composition or usage of the coarse grained application components, which are loosely coupled through the network.
The Access of Mobile Devices by Plug-in Programming In the plug-in application system, the program is not a single executable file, but the composition of main program and a number of small external modules.
In the plug-in application, the main program can communicate with plug-ins and call their functions through certain rules and specific interfaces, which is different from the normal function calling., in which the main program and plug-ins are completely independent, and they can be running separately and achieve their functions, the plug-ins contain individual modules that realized specific functions, the main program can dynamically call the services provided by a number of different plug-ins in the runtime.
(3) E: Workload KLOC: Per thousand lines of code D: Developing time (M) N: The number of developing persons B.
Through the estimated comparison of the workload of the two OA systems, it’s easy to see that the plug-in design approach slightly increases the number of programmer, reduces the workload and shortens the work cycle, and greatly improves the efficiency of developing. 
Online since: May 2011
Authors: Min Xie, Zheng Liu, Xiao Mei Liu
It is seen from Fig.1b that there are several of phases in the composite: the number 1, 2, 3 and 4 represent primary Mg2Si, eutectic Mg2Si, eutectic and α-Al, respectively.
Eutectic presents the big agglomerate (as shown in Fig.1b number 3).
RE2O3 can serve as nuclei of Mg2Si during the composite solidification to increase number of Mg2Si nuclei, so that the size of Mg2Si reduces, as shown in Fig. 1a and Fig. 2a.
The numbers of Mg2Si increase after modification, but the volume fraction of Mg2Si does not distinctly change.
Ca has obvious effect on fining grain, and can depress oxidization of melt as well as improves the creep resistance of aluminum alloy.
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