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Online since: July 2004
Authors: Geun Hee Lee, Wheung Whoe Kim, Chang Kyu Rhee, Young Soo Han
As the compaction temperature increased from 20 to 300 o C, the size of pores increased from 1.69 to 2.31 nm, whereas the number of pores decreased from 169 to 71 (1/cmÅ 2) in case of 1.6 GPa compaction pressure.
Since we assumed there are no other components in the samples, this leads to the assumption that the measured scattering signal originates from pore/grain interface.
As the compaction temperature increased from 20 to 300 o C, the size of pores increased from 1.69 to 2.31 nm, however, the number of pores decreased from 169 to 71 (1/cmÅ 2) in case of 1.6 GPa compaction pressure.
Online since: November 2013
Authors: Tian Yu Ren, Guo Long Chen, Wei Min Zhang, Zhong Chao Qiu
Studies have shown that the detection method based on the magnetic Barkhausen noise can be widely applied to the magneto-elastic stress testing and microstructure (grain size, metallurgical composition changes) of ferromagnetic specimen and some other areas [3].
The dislocations created at this stage is mainly isolated, and the number of irreversible magnetization processes rises, which increase the RMS value of MBN consequently.
The newly emerging dislocation tangles and cell boundaries increases the number of microscopic pinning sites, which act as obstacles to the movement of domain walls.
Online since: November 2012
Authors: Xi Luo, Li Qun Tang, Xian Wei Zeng
Introduction Classical theory of dynamic poroelasticity proposed by Biot [1] have been widely used in the investigations of soil foundations and soil-structure interaction problems by simplifying soils as two-phase media contains soil grains and pore fluids.
When an aximmetrical vertical load is acting on the free surface of a poroelastic half-space, the total number of nonzero solid and fluid displacements is reduced from 6 which corresponds to the general motion of three-dimensional poroelastic solids to 4.
Other variables appearing in the above equations are defined in the following, (16) (17) (18) (19) (20) (21) (22) where (23) (24) (25) (26) combined with the nondimensional material properties and frequency defined by, ; ; ; ; ; (27) and S are the non-dimensional wave numbers of three types of dispersive and dissipative body waves propagating in a poroelastic medium.
Online since: December 2010
Authors: Martina Iskrová, Ondrej Šauša, Barbora Sláviková, Viktor Majerník, Jozef Krištiak
Total number of coincidences in analysed time spectra overreach 1x106 counts.
The time resolution was about 320 ps FWHM (measured by defect free Al sample, 3 Gaussian approximation of resolution function).Source and window correction was taken into account (17.6% of the total number of annihilations).
The tendency to shift this temperature by addition of small amount of small SiO2 grains for acceleration of crystallization increase this temperature to 265 K.
Online since: May 2018
Authors: Ke Xun Li, Kun Jia, Miao Jie Qiao, Jiang Jiang Ma, Jie Zhang, Bi Cheng Zhou, Dong Hong Wang
TEM measurements confirmed the hollow structure of the porous carbon and its composition, which is composed of a great quantity of crystalline grains with size about from 20nm to 40nm as shown in Fig. 2.
As shown in Fig. 4, the first charge-discharge curve after preparation of Li ion batteries at the current density of 100mAh·g-1 is approximately linear and the specific capacitance decreased with the increase of cycle number, but the specific capacitance of the porous carbon and its composites can be obviously improved by the doping composite.
Fig. 4 The charge-discharge curve of the first cycle and the curve of specific capacity at different cycle numbers (1the sweet potato dried by freeze-drying; 2 the sweet potato dried by freeze-drying dipped with TBOT; 3, 4 the leaves and stems of coriander dried by freeze-drying ) Fig. 5 X-ray diffraction patterns of the sample carbon/TiO2 composition and carbon/SiO2 by RAPET The crystal structures were determined on a Bruker D8 powder X-ray diffractometer (Cu Kα=1.540598Ả).
Online since: February 2011
Authors: Jing Zhu, Jing Jing Xu, Zong Ning Chen, Hong Lan Xie, Ti Qiao Xiao, Jun Xu, Tong Min Wang, Ting Ju Li
Liao et al [6,7] reported that PEC can result in the multiplication of the crystal nucleus and grain refinement by making the crystal nucleus on the mould wall fall down and drift in the liquid.
As the disturbance of PEC can decrease the potential barrier of nucleation, increase the number of nucleating sites and shorten incubation time of nucleation, the nucleation rate is improved.
Due to the disturbance of PEC to the liquid alloy, the growing dendrites are broken up to form more nucleus, which increase the number of crystal nucleus and refine the dendrites.
Online since: April 2011
Authors: Zhe An Lu, Jian Xiong Xie
(3) Infiltrating study: quality quartz grain, when the size of quartz sand is bigger, its specific surface area is small, which need less infiltration of resin, when the size of quartz sand is smaller, its specific surface area is bigger, which need more infiltration of resin.
Test Condition: (1) test environment conditions: temperature (23±2) degrees, relative humidity (50±5) (2) sample appearance condition: sample should be flat, bubble-free, flawless, no obvious impurity, processing damage and so on, otherwise, the sample should be null and void, (3) measurement precision of sample size conditions: the size not more than 10mm and accurate to 0.02 mm, the size more than 10mm and accurate to 0.05mm, (4)the condition of the sample number: the effective sample number of each group was not less than five.
Online since: October 2011
Authors: Hong Yan Liao, Hong Ling Chen, Hai Chao Wang
Tenebrio known as the "king of animal protein feed," in the world, by factory production, which provides a large number of high-quality animal protein, to promote aquaculture development.
With the land, grain-saving, water, energy, saving space, saving manpower, "six" feature.
After the sale of goods insects, farmers have been breeding in a large number of adults, this is an investment in long-term benefit[7].
Online since: September 2013
Authors: Zhi Cong Wei, Tie Min Zhang, Ying Bo Mao, Shan Wang, Jian Jun Fang
It is clear that the temperature has a very large effect, namely with the reaction of temperature rising, the spread of solvent molecules in leaching solution speeds up and the stockpile energy of mineral grains increases, then the ability of damage or weakening of the chemical bonds of mineral enhances, and the number of molecules whose kinetic energy is equal to or greater than activation energy increased.
Table 3 Results of test at best conditions Test number 1 2 3 4 Leaching rate /% 58.88 58.92 59.42 59.12 Conclusion (1) The researches of ore properties show that the oxidized zinc ore has the characters of high oxidation and high SiO2 and CaO
Online since: October 2013
Authors: Bo Chen, Ze Hu, Liang Ge, Jun Lan Li
Each collection module is responsible for collecting tens to hundreds, even thousands of housing temperature data, but the specifically the number, depending on the built environment and specific circumstances.
The figure above shows a virtual design, increasing or reducing the number depend on practical environment in practical.
[2] Donghui Sun, Ruixue Cui, Lihua Xu, The Research of Monitor System for Grain Situation Based on Zigbee Wireless Sensor Network, Proceeding of the 18th International Symposium on Test and Measurement (Volume 4), 2009
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