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Online since: May 2012
Authors: Muhammad Anis-ur-Rehman, S. Nasir, G. Asghar, M. Akram
Relative number of the under-coordinated atoms those lies at the surface provides a tool to tune the properties of a nanosolids.
The nano magnetic particles have special properties as compared to bulk because of the large volume fraction that atoms occupy at the grain boundary area with decrease of particle size [8].
Drift mobility (µd) of all the samples has been calculated using the relation, µd =1/neρ (4) Where e is the charge of electron, ρ the electrical resistivity at a particular temperature and n is the concentration of charge carrier, which can be calculated from the relation, n = Na ρm PFe/M (5) where M is the molecular weight, Na the Avogadro's number, ρm the measured density of sample and PFe is the number of iron atom in the chemical formula of the ferrites.
XRD patterns of Co1-xMnxFe2O4 (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0) The peaks corresponding to * belongs to Fe2O3 phase The XRD patterns were indexed using the JCPDS card numbers 22-1086 and 74-2403.
Further, as the frequency of the externally applied electric field increases gradually, and though the same number of ferrous ions is present in the ferrite material, the dielectric constant decreases.
The nano magnetic particles have special properties as compared to bulk because of the large volume fraction that atoms occupy at the grain boundary area with decrease of particle size [8].
Drift mobility (µd) of all the samples has been calculated using the relation, µd =1/neρ (4) Where e is the charge of electron, ρ the electrical resistivity at a particular temperature and n is the concentration of charge carrier, which can be calculated from the relation, n = Na ρm PFe/M (5) where M is the molecular weight, Na the Avogadro's number, ρm the measured density of sample and PFe is the number of iron atom in the chemical formula of the ferrites.
XRD patterns of Co1-xMnxFe2O4 (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0) The peaks corresponding to * belongs to Fe2O3 phase The XRD patterns were indexed using the JCPDS card numbers 22-1086 and 74-2403.
Further, as the frequency of the externally applied electric field increases gradually, and though the same number of ferrous ions is present in the ferrite material, the dielectric constant decreases.
Online since: May 2014
Authors: De Hai Ping, Y. Yamabe-Mitarai, Murugesan Jayaprakash
Numerous numbers of research works has been focused on the improvement of the high temperature performances of Ti alloys.
The reason might be due to the solid-solution strengthening effect of Zr in Ti and also the presence of the silicide at the grain boundaries.
The reason might be due to the solid-solution strengthening effect of Zr in Ti and also the presence of the silicide at the grain boundaries.
Online since: July 2012
Authors: Zhi Xiang Hou, Tao Wang, Dong Chen Zhang
The optimum technological combination of flocculation test has been obtained:incubation time:12h,Coagulation aid dosage:2mL,Bacterium fluid amount:2mL,The categories of flocculants: the cell homogenates,pH:7.The FTIR analysis showed that the extractive of Rhodopseudomonas spheroides contain a large number of acidic Polysaccharides which has flocculent effect component.The main flocculation is “adsorption-bridge” between Molecular bioflocculant and coal slurry.
Introduction Coal slurry is industrial wastewater which was used in coal washing and dressing,the main charateristic of coal slurry is fine grained, high-ash and mostly negative charge on particle surface[1].Pea coal distributes in water as seperated type occurrence,usually use APAM to increase the sedimentation of fine particles suspended in coal slurry[2],however its high price and the large usage,not only raise costs of production but also increased pollution of the environment.
Specification: ScannerVelocity: 100kHz; Beamsplitter: KBr; X-axle: wave number(/cm-1);y-axle:transmitance(/%).
Introduction Coal slurry is industrial wastewater which was used in coal washing and dressing,the main charateristic of coal slurry is fine grained, high-ash and mostly negative charge on particle surface[1].Pea coal distributes in water as seperated type occurrence,usually use APAM to increase the sedimentation of fine particles suspended in coal slurry[2],however its high price and the large usage,not only raise costs of production but also increased pollution of the environment.
Specification: ScannerVelocity: 100kHz; Beamsplitter: KBr; X-axle: wave number(/cm-1);y-axle:transmitance(/%).
Online since: June 2011
Authors: Chia Wen Peng, Yi Han Huang, Ting Ru Tsai, Wei Ru Kuo, Hen Chien Lin, Ying Pin Huang
The grain size distributions of pearlite and MMC were shown in Table 3.
All of the grains of the commercial pearlite are less than 40 mesh.
Because MMC is brittle, only 24 to 31% of the grains of pulverized MMC are less than 40 mesh.
Table 3: the grain size distributions of pearlite and MMC (wt. %).
This probably results from the smaller grain sizes of MMC, which may be the reason that the three types of MMC-P have a lower AFP.
All of the grains of the commercial pearlite are less than 40 mesh.
Because MMC is brittle, only 24 to 31% of the grains of pulverized MMC are less than 40 mesh.
Table 3: the grain size distributions of pearlite and MMC (wt. %).
This probably results from the smaller grain sizes of MMC, which may be the reason that the three types of MMC-P have a lower AFP.
Online since: September 2019
Authors: Faouzi Hanini, Mourad Khechba, Abderrahmane Bouabellou, Somia Gattal, Hichem Farh
The number of layers was fixed at 03, but the immersion time varied between 01 to 10 minutes.
To obtain with higher thickness films, the sequence of dipping, drying and then dipping again was performed a number of times.
This might be attributed to the slight increase in grain size and the homogeneity of the structure.
To obtain with higher thickness films, the sequence of dipping, drying and then dipping again was performed a number of times.
This might be attributed to the slight increase in grain size and the homogeneity of the structure.
Online since: June 2010
Authors: Bing Xue, Ying Cheng Hu
There were four
compression ratios for different ply numbers of LVL, 8.1% for eight-ply samples, 18.3% for nine-ply
samples, 26.5% for ten-ply samples, 33.1% for eleven-ply samples, respectively.
Introduction Laminated veneer lumber (LVL) is an engineered wood product manufactured from veneers that are rotary peeled, dried and laminated together with parallel oriented grains under heat and pressure with a waterproof adhesive.
There were four compression ratio for different ply number of LVL, 8.1% for eight-ply samples, 18.3% for nine-ply samples, 26.5% for ten-ply samples, 33.1% for eleven-ply samples, respectively.
Introduction Laminated veneer lumber (LVL) is an engineered wood product manufactured from veneers that are rotary peeled, dried and laminated together with parallel oriented grains under heat and pressure with a waterproof adhesive.
There were four compression ratio for different ply number of LVL, 8.1% for eight-ply samples, 18.3% for nine-ply samples, 26.5% for ten-ply samples, 33.1% for eleven-ply samples, respectively.
Online since: July 2011
Authors: Ming Shi Wang, Fan Qin, Xiao Zhang
Concentration of particles of different grain size was measured and analyzed.
Experiments on actual collection in temples 2, Continuous sampling for eight hours a day.Sample Numbers were QL1 and QL2.
Blank samples were collected near the sampling point under the same conditions, Sample Numbers were GY0 and QL0.
A large number of incense was incomplete combustion,and was topped with water, piled up elsewhere.
Since burning incense can release a large number of fine particles, we need to reduce the number of incense and use qualifide incense, in order to mitigate the bad effects.
Experiments on actual collection in temples 2, Continuous sampling for eight hours a day.Sample Numbers were QL1 and QL2.
Blank samples were collected near the sampling point under the same conditions, Sample Numbers were GY0 and QL0.
A large number of incense was incomplete combustion,and was topped with water, piled up elsewhere.
Since burning incense can release a large number of fine particles, we need to reduce the number of incense and use qualifide incense, in order to mitigate the bad effects.
Online since: March 2020
Authors: Noorhana Yahya, Beh Hoe Guan, Maziyar Sabet, Saeid Kakooei, Kean Chuan Lee, Hassan Soleimani, Hassan Ali, Arash Dehzangi
Several modifications on computational fluid dynamics (CFD) have been made to increase the number of unknown variables.
The pore size and grain size were generated randomly, and the shape of porous structure was designed just like the surface image of sandstone as shown in Figure 1.
The model is three dimensional with anisotropic structure of pore and grain. 2.
This method can be used to develop a tool for the characterization of reservoir by increasing the data sets and large number of measurements can be carried out.
The pore size and grain size were generated randomly, and the shape of porous structure was designed just like the surface image of sandstone as shown in Figure 1.
The model is three dimensional with anisotropic structure of pore and grain. 2.
This method can be used to develop a tool for the characterization of reservoir by increasing the data sets and large number of measurements can be carried out.
Online since: June 2013
Authors: Jian Jun Yang, Jian Jun Wang
In the process of generating grinding, grinding worm are subject to wear, the grinding grains loose their cutting ability and the grinding worm have thus to be redressed to recover the macro and micro geometry by using diamond based dressing tools.
So the is represented in by the equation: (5) In general, the number of threads of grinding worm is 1, the number of pinion teeth is Z.
Table 1 The major design parameters of helical gear Gear 1 2 Number of teeth /Z 40 Normal module/Mn 5 Normal Pressure angle/ o 20o Helical angle/ o 20o Modification value/ 0 According to the above calculation process, the contact line between grinding worm and pinion is a space spiral line on surface of grinding worm as shown in Fig. 2.
So the is represented in by the equation: (5) In general, the number of threads of grinding worm is 1, the number of pinion teeth is Z.
Table 1 The major design parameters of helical gear Gear 1 2 Number of teeth /Z 40 Normal module/Mn 5 Normal Pressure angle/ o 20o Helical angle/ o 20o Modification value/ 0 According to the above calculation process, the contact line between grinding worm and pinion is a space spiral line on surface of grinding worm as shown in Fig. 2.
Online since: September 2007
Authors: Xiao Peng Li, Jing Zhang, Bang Chun Wen, Zhao Hui Ren, Nai Hui Song
During recent decades, the mesoscale modelling
of the microstructural formation in material processing has progressed markedly based on Cellular
Automaton (CA) formulations, especially in the fields of recrystallized structures, of grain structure
formation in solidification processes and of dendritic growth.
In the current model, the homogeneous damage initiation is adopted, and a initiation probability NUCp at any cell is determined by CAN tN p NUCNUC ∆ = & , where NUCN& is initiation rate, t∆ is the time length of each time step, and NCA is the cell number of the CA lattice.
For each site, a random number r ( 10 <≤ r ) is generated and compared with the initiation probability.
A non-void cell will become void if it has void cells and its generated transition random number chgr ( 10 <≤ chgr ) is smaller than the growth probability rowpg of one void cell neighboring to the non-void cell.
In the current model, the homogeneous damage initiation is adopted, and a initiation probability NUCp at any cell is determined by CAN tN p NUCNUC ∆ = & , where NUCN& is initiation rate, t∆ is the time length of each time step, and NCA is the cell number of the CA lattice.
For each site, a random number r ( 10 <≤ r ) is generated and compared with the initiation probability.
A non-void cell will become void if it has void cells and its generated transition random number chgr ( 10 <≤ chgr ) is smaller than the growth probability rowpg of one void cell neighboring to the non-void cell.