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Online since: February 2014
Authors: Catrin M. Davies, Kamran Nikbin, Ali Mehmanparast
Measurements were taken at a number of positions in the plane of the crack, at the mid height and mid thickness of the specimens.
To ensure that sufficiently large number of grains is included in the measurements a gauge volume of 2 × 2 × 2 mm3 on specimens 16 and 23 and 3 × 3 × 3 mm3 on specimen 26 was used for ND measurements.
Different gauge volumes were used to optimise the number of measurements can be made during the available beam time.
To ensure that sufficiently large number of grains is included in the measurements a gauge volume of 2 × 2 × 2 mm3 on specimens 16 and 23 and 3 × 3 × 3 mm3 on specimen 26 was used for ND measurements.
Different gauge volumes were used to optimise the number of measurements can be made during the available beam time.
Online since: November 2012
Authors: Shou Feng Yang, Guo Liang Lin, Julian R.G. Evans, Xiao Peng Chi
.%, (ii) the rate of volatilisation of solvent influences the differential shrinkage between layers; in the worst case scenario the base layer has fully dried so that its shrinkage is complete when the next layer begins to dry, (iii) the span between filaments determines the number of welds per unit area and hence overall laminate strength, (iv) as the span decreases and the lattice becomes more densely packed, the vapour transport within the structure decreases and drying rate slows down, in turn reducing drying deformation.
At high porosity, the number of welds per unit area is low and delamination is facilitated.
Acknowledgements The authors are grateful to the Engineering and Physical Sciences Research Council (EPSRC) for supporting this work under grant number GR/S57068.
Safari, An Overview of Rapidly Prototyped Piezoelectric Actuators and Grain-Oriented Ceramics, J. electro. ceram., Vol. 8(2002), PP. 129-137
At high porosity, the number of welds per unit area is low and delamination is facilitated.
Acknowledgements The authors are grateful to the Engineering and Physical Sciences Research Council (EPSRC) for supporting this work under grant number GR/S57068.
Safari, An Overview of Rapidly Prototyped Piezoelectric Actuators and Grain-Oriented Ceramics, J. electro. ceram., Vol. 8(2002), PP. 129-137
Online since: October 2014
Authors: Stanislaw Piesiak, Wiesław Jargulinski, Krzysztof Jamroziak
It causes so-called "hydrogen embrittlement", which is undesirable in the number of working construction in extreme conditions.
Fatigue microcracks: a) – in a half cycle of tension, b) – in the half cycle of compression Water vapor generates the oxygen which creates the gaps on the surface, especially in areas of crystalline defects and on the corners grains creates the metal oxides having the ion structure [12].
On the basis of studies was conducted a number of laboratory testsaimed at verifying the tightness of anti-hydrogen coatings with the usage of the electrode potentials sample of the woolen or concrete electrode.
As a result of measurements, a number of charts of the electrode potential in a function of time were obtained. [4,16].
Fatigue microcracks: a) – in a half cycle of tension, b) – in the half cycle of compression Water vapor generates the oxygen which creates the gaps on the surface, especially in areas of crystalline defects and on the corners grains creates the metal oxides having the ion structure [12].
On the basis of studies was conducted a number of laboratory testsaimed at verifying the tightness of anti-hydrogen coatings with the usage of the electrode potentials sample of the woolen or concrete electrode.
As a result of measurements, a number of charts of the electrode potential in a function of time were obtained. [4,16].
Online since: June 2015
Authors: Petru Cardei, Iulian Voicea, Vergil Muraru, Mihai Ludig, Gheorghe Voicu, Mihai Matache
A number of researchers have deepened Wohler’ theory, developing a complex model of the metal fatigue phenomenon: Bauschinger, Gerber and Goodman, for example, [10], [11], [12].
The grain cross-section corresponds to sudden rupture.
The number of cycles for the bar hold up to failure, it is different for the two cases.
In the ideal case, this number is infinite while the modified model has a finite value (Table 1).
The grain cross-section corresponds to sudden rupture.
The number of cycles for the bar hold up to failure, it is different for the two cases.
In the ideal case, this number is infinite while the modified model has a finite value (Table 1).
Online since: January 2020
Authors: Doaa M. Abdullah, Farhad Mohammed Othman, Alaa Aladdin Abdul-Hamead
The number of studies on nanotechnology related to the number of studies on nanotechnology related to the petroleum industry has been growing rapidly in the past few years.
In the petroleum industry, The utilized cement in the oil wells is classified as class G cement, which is different from Portland cement by a low amount of “celite” (C3A) and has larger grains than usual Portland cements [10].
Cement class mixtures were prepared using two different groups of Nano materials, which are (Nano cement dust ,Zno Nano rods) in four concentrations (0.25%, 0.5%, 0.75%, and 1%) per weight .In order to achieve these steps, number of samples were designed for oil well cement class “G” that must apply 792 gm weight of cement and 349 gm water, according to the American Petroleum Institute (API, 1997) in (9) classes, from A to J.
In the petroleum industry, The utilized cement in the oil wells is classified as class G cement, which is different from Portland cement by a low amount of “celite” (C3A) and has larger grains than usual Portland cements [10].
Cement class mixtures were prepared using two different groups of Nano materials, which are (Nano cement dust ,Zno Nano rods) in four concentrations (0.25%, 0.5%, 0.75%, and 1%) per weight .In order to achieve these steps, number of samples were designed for oil well cement class “G” that must apply 792 gm weight of cement and 349 gm water, according to the American Petroleum Institute (API, 1997) in (9) classes, from A to J.
Online since: December 2012
Authors: Ping Song Zhang, Song Chen, Xiang Hong Liu, Lin Hua Sun
General and top floor rock ore bodies (dark clouds become grain of rock) clearly defined boundaries for ourselves, along with the tendency towards common clip stone (layer) and with branch composite phenomenon; Mineralization is continuous, generally for thousands of meters, and tend to have pointed to the destroyed trend, overall is limited extension of ore body the plate, but some of the area remains downward extension trend.
Data acquisition instrument to use YCS40 (A), specific sampling parameters table 1: Table 1 Data acquisition of specific technical parameters Parameter settings of the instrument Device Parameters Settings Launch voltage 7.0V With sides launch 2m Launch frequency 8.3Hz Launch circle number 9 turns Superposition number 128 Resistance requirements <=10 Inhibit coefficient 3 Receiving side 2.0m Measured way several 40 Receiving circle number 18turns Record time window 0.008ms~864ms 2.3 Data processing The data processing is using and YCS40(A )transient electromagnetic processing software, the processed get ahead in transient electromagnetic apparent resistivity section of the fitting results figure, as shown in figure 6 for-320 II ore body along the east pulse 42 line head-on transient electromagnetic detection apparent resistivity graph, from left to right, for 45 ° on the head-on, bedding and head-on head-on the 45 ° the apparent resistivity section to the chart, according
Data acquisition instrument to use YCS40 (A), specific sampling parameters table 1: Table 1 Data acquisition of specific technical parameters Parameter settings of the instrument Device Parameters Settings Launch voltage 7.0V With sides launch 2m Launch frequency 8.3Hz Launch circle number 9 turns Superposition number 128 Resistance requirements <=10 Inhibit coefficient 3 Receiving side 2.0m Measured way several 40 Receiving circle number 18turns Record time window 0.008ms~864ms 2.3 Data processing The data processing is using and YCS40(A )transient electromagnetic processing software, the processed get ahead in transient electromagnetic apparent resistivity section of the fitting results figure, as shown in figure 6 for-320 II ore body along the east pulse 42 line head-on transient electromagnetic detection apparent resistivity graph, from left to right, for 45 ° on the head-on, bedding and head-on head-on the 45 ° the apparent resistivity section to the chart, according
Online since: May 2012
Authors: Kai Xuan Tan, Yong Xiang Huang, Wei Guang Wang, Gui Long Cai
In addition, adsorption and coprecipitation processes lead to the fixation of Ra-226 in iron oxyhydroxides, feldspars, clays, amorphous silica, organic matter, barite, and other sulfate grains.
On the one hand, a large number of uranium tailings and waste rock occupation of a large number of barren land and destruction of vegetation; On the other hand can through the five ways to the public and the ecological environment caused pollution and harm: 1) exhalation of radon and its daughters; 2) γ radiation; 3) inhalation or ingestion of dust; 4) contaminated water; 5) the transfer of enrichment plants grown in the vicinity.
A large number of studies show that the soil of uranium mine and its adjacent areas affected by radioactive contamination and the irrigation using radioactive contaminated wastewater can lead to the migration and enrichment of radionuclides to plants and crops which result in death, over limit of nuclide content, and inedibility [16-18].
On the one hand, a large number of uranium tailings and waste rock occupation of a large number of barren land and destruction of vegetation; On the other hand can through the five ways to the public and the ecological environment caused pollution and harm: 1) exhalation of radon and its daughters; 2) γ radiation; 3) inhalation or ingestion of dust; 4) contaminated water; 5) the transfer of enrichment plants grown in the vicinity.
A large number of studies show that the soil of uranium mine and its adjacent areas affected by radioactive contamination and the irrigation using radioactive contaminated wastewater can lead to the migration and enrichment of radionuclides to plants and crops which result in death, over limit of nuclide content, and inedibility [16-18].
Online since: December 2010
Authors: De Sheng Zhang, Yuan Ying Li
The web and the lower flange of arched corrugated metal roof have a number of transverse corrugations, which are distributed along the extension direction with pitch arcs, with lengthways equably distributed along the arch.
Grain Distribution Technology.2007(2), p11-p13.
Grain Distribution Technology.2007(2), p11-p13.
Online since: July 2011
Authors: Effat Yahaghi, Amir Movafeghi, Shokoofeh Ahmadi, Sholeh Ansari, Mehran Taheri, Naser Rastkhah
The equation that clearly depicts the relationship between all gamma radiographic parameters, namely specifications of source (i.e. energy and activity), specifications of specimen (i.e. thickness and linear atomic attenuation coefficient) and radiography conditions (i.e. source-to-film distance, film type and scattering) is:
where D is the film density of radiograph (dimensionless), E is the film exposure (Ci.min), SFD is source-to-film distance, and e is Euler number (2.718) and t is beam path thickness (mm).
N.M., Examination of Paintings by Physical and Chemical Methods, Department of Communications, and held at the National Gallery,, Canadian Conservation Institute (CCI) – Publications , http://www.cci-icc.gc.ca/ accessed Oct. 2007 [16] Ghose B., Kankane D.K. , Estimation of location of defects in propellant grain by X-ray radiography, NDT&E International Vol. 41 pp.125-128, (2008)
N.M., Examination of Paintings by Physical and Chemical Methods, Department of Communications, and held at the National Gallery,, Canadian Conservation Institute (CCI) – Publications , http://www.cci-icc.gc.ca/ accessed Oct. 2007 [16] Ghose B., Kankane D.K. , Estimation of location of defects in propellant grain by X-ray radiography, NDT&E International Vol. 41 pp.125-128, (2008)
Online since: October 2011
Authors: Sushil Phadke, B.D Shrivastava, Ashutosh Mishra, N Dagaonkar
The presence of polymers leads to decrease in the number of polarisable units to use BF tree for insulating applications.
Khalid and H.A.A.Sidek: Dielectric and ultrasonic properties of rubber wood, effect of moisture content, grain direction and frequency, Holz Roh Werkst, 56, (1998), pp 223-227
Khalid and H.A.A.Sidek: Dielectric and ultrasonic properties of rubber wood, effect of moisture content, grain direction and frequency, Holz Roh Werkst, 56, (1998), pp 223-227