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Online since: June 2024
Authors: Somnath Bhowmick, Sandeep Kumar Sahni, Anish Upadhyaya
After creating the initial configuration, the system was equilibrated at 300 K for 2 ns using the NVT (fixed number of atoms, fixed volume, fixed temperature) ensemble.
Once the system was relaxed, the simulation box was allowed to change its dimensions under NPT (fixed number of atoms, fixed pressure, and fixed temperature) ensemble.
Fig. 1: (a) Simulation box containing four grains (b) Random arrangement of Fe and Ni atoms in initial atomistic configuration (c) sintering cycle followed.
The local crystal structures are mapped on each atom according to the coordination number.
The particle surface exhibits an amorphous structure due to an incomplete coordination number of the surface atoms, whereas the interior is mainly a body centred cubic (BCC) structure.
Once the system was relaxed, the simulation box was allowed to change its dimensions under NPT (fixed number of atoms, fixed pressure, and fixed temperature) ensemble.
Fig. 1: (a) Simulation box containing four grains (b) Random arrangement of Fe and Ni atoms in initial atomistic configuration (c) sintering cycle followed.
The local crystal structures are mapped on each atom according to the coordination number.
The particle surface exhibits an amorphous structure due to an incomplete coordination number of the surface atoms, whereas the interior is mainly a body centred cubic (BCC) structure.
Online since: January 2016
Authors: Yukio Maeda, Kazuya Kato, Hideaki Tanaka
These results show the following:
(1) Regardless of the depth of cut, the roundness was less than 3 μm, and the straightness was less than 2 μm at the second machining number
(2) Regardless of the depth of cut, the surface roughness in the circumferential and axial directions was less than 2 μmRzjis at the second machining number
Furthermore, a proportional relationship was observed between the number of workpieces and amount of wheel wear
(4) When the depth of cut was 2 μm, the grinding wheel wear was large, and the wear rate was 37 μm/workpiece (wear rate = amount of wheel wear / number of workpieces).
Kumagai, Study on the Cylindrical Grinding by the Cup Type Grinding Wheel (1st Report) -On the Cross Hatch Angle and the Grain Depth of Cut-, Journal of the Japan Society Precision Engineering, Vol. 33, No. 2 (1967) pp. 86-94 [2] N.
(2) Regardless of the depth of cut, the surface roughness in the circumferential and axial directions was less than 2 μmRzjis at the second machining number
Furthermore, a proportional relationship was observed between the number of workpieces and amount of wheel wear
(4) When the depth of cut was 2 μm, the grinding wheel wear was large, and the wear rate was 37 μm/workpiece (wear rate = amount of wheel wear / number of workpieces).
Kumagai, Study on the Cylindrical Grinding by the Cup Type Grinding Wheel (1st Report) -On the Cross Hatch Angle and the Grain Depth of Cut-, Journal of the Japan Society Precision Engineering, Vol. 33, No. 2 (1967) pp. 86-94 [2] N.
Online since: February 2016
Authors: Victoria Ivanova, Mihail Buldakov, Tatyana Yurmazova, Sergey Galanov
At present to complete this task, magnetic carriers are used and there is a great number of methods for magnetic carriers to be obtained.
Method of treatment of iron grains dipped into dispersion medium by pulse electric discharge [11, 12] is represented to be an advanced technology for different composite materials to be obtained.
For samples B and D we observed significant decrease in number of cancer cells, which is comparable to the individual action of doxorubicin.
According to the obtained data for sample B with doxorubicin, proliferative activity of cancer cells decreases and the number of survivor cells is close to the control sample.
According to the presented data, significant increase in the number of dead tumor cells was observed, i.e. the type of medicine action has changed from cytostatic to cytolytic.
Method of treatment of iron grains dipped into dispersion medium by pulse electric discharge [11, 12] is represented to be an advanced technology for different composite materials to be obtained.
For samples B and D we observed significant decrease in number of cancer cells, which is comparable to the individual action of doxorubicin.
According to the obtained data for sample B with doxorubicin, proliferative activity of cancer cells decreases and the number of survivor cells is close to the control sample.
According to the presented data, significant increase in the number of dead tumor cells was observed, i.e. the type of medicine action has changed from cytostatic to cytolytic.
Online since: December 2013
Authors: Guang Fu, Ying Jie Dong, Chao Wang
Fracture control reservoir function
Through research fracture development and system partition and anatomy of the reservoir shows that the fracture on the formation of the reservoirs mainly the following two aspects
Fracture provides migration conditions for oil and gas
Early extend fracture make 1st member of Nantun group and the south 2nd member of Nantun group reservoir side joint
The reservoir are mainly distributed in the early stretch near the early extend fracture in the south 2nd member of Nantun group horizon in South beier sag, and the more early stretch fracture number, the more oil well number.in the south 2nd member of Nantun group.This is because the south 2nd member of Nantun group reservoir above 1st member of Nantun group surcerock, multiple sets of mudstone layer between them apart,1st member of Nantun group surcerock generate oil through hard rock pore directly migrate into the south 2nd member of Nantun group reservoir, only connect 1st member of Nantun group surcerock
Long-term developmental fracture with conducting channel for the inversion of tectonic secondary hydrocarbon migration It can be seen from the figure 1, it has now been found near the reservoirs are mainly distributed in near the long-term development fracture in Damoguai group of South beier sag, and the more long-term developmental fracture number, the more oil well number.
Fig.1 Major rift zone secondary hydrocarbon reservoirs and inversion structure, long-term development relationship between fracture diagram of South Beier Sag Fracture provide shelter for oil-gas accumulation Reverse fault "back on" low uplift area is primary oil and gas gathering area Anatomy of the reservoir shows that antithetic faults block out and come into being "back on" low uplift area in the updip direction within the hydrocarbon generation subsags or close to hydrocarbon generation subsags tilted uplift and the top strata experiences a certain number of denudation due to rise.
Due to the influence of sediment grain size and lithology, sand body of the braided river delta front has high porosity and permeability.
Long-term developmental fracture with conducting channel for the inversion of tectonic secondary hydrocarbon migration It can be seen from the figure 1, it has now been found near the reservoirs are mainly distributed in near the long-term development fracture in Damoguai group of South beier sag, and the more long-term developmental fracture number, the more oil well number.
Fig.1 Major rift zone secondary hydrocarbon reservoirs and inversion structure, long-term development relationship between fracture diagram of South Beier Sag Fracture provide shelter for oil-gas accumulation Reverse fault "back on" low uplift area is primary oil and gas gathering area Anatomy of the reservoir shows that antithetic faults block out and come into being "back on" low uplift area in the updip direction within the hydrocarbon generation subsags or close to hydrocarbon generation subsags tilted uplift and the top strata experiences a certain number of denudation due to rise.
Due to the influence of sediment grain size and lithology, sand body of the braided river delta front has high porosity and permeability.
Online since: January 2013
Authors: Radivoje Mitrovic, Milan Banic, Aleksandar Miltenovic
The micrograph picture of the material Fe1.5Cr0.2Mo sintered steel with the pyrohydrolysis treatment (Fig. 4) shows a uniform, homogeneous fine-grained ferrite and pearlite microstructure.
Increase of wear rate is smallest, for load cycles number NL = 1,5×106 is wear rate δwn = 86 mm.
Figure 14: Comparison of wear and load cycles number for different speed sliding and t =160h Figure 14 shows the comparison of wear δwn and load cycles number for different sliding speeds vgs = 0.76 m/s, 2.53 m/s and 5.05 m/s after operating time t = 160 h.
In tests with sliding speeds vgs = 0.76 m/s occur the highest wear rate for the smallest load cycles number.
The micrograph picture of the material Fe1.5Cr0.2Mo sintered steel with the pyrohydrolysis treatment shows a uniform, homogeneous fine-grained ferrite and pearlite microstructure.
Increase of wear rate is smallest, for load cycles number NL = 1,5×106 is wear rate δwn = 86 mm.
Figure 14: Comparison of wear and load cycles number for different speed sliding and t =160h Figure 14 shows the comparison of wear δwn and load cycles number for different sliding speeds vgs = 0.76 m/s, 2.53 m/s and 5.05 m/s after operating time t = 160 h.
In tests with sliding speeds vgs = 0.76 m/s occur the highest wear rate for the smallest load cycles number.
The micrograph picture of the material Fe1.5Cr0.2Mo sintered steel with the pyrohydrolysis treatment shows a uniform, homogeneous fine-grained ferrite and pearlite microstructure.
Online since: January 2023
Authors: Valeriy Zhdaniuk, Shuai Wang, Jian Sun
Km is defined as the ratio of the UCS of a cylindrical specimen after a specified number of freeze-thaw cycles to the strength of a control specimen not subjected to freeze-thaw.
The freezing resistance of CSM, industrial wastes and soils with the number of freeze-thaw cycles according to the CSM grade is shown in Table 7.
In such a structure, grains of crushed stone formed a spatial skeleton, the voids in which are filled with fine aggregate (sand), as shown in Fig.9.
In such a structure there are not enough crushed stone grains to form a spatial skeleton; therefore, they are moved apart from one another by a layer of fine aggregate.
The results show that the frost resistance coefficient of CSM decreases regularly with the increase of the number of freeze-thaw cycles.
The freezing resistance of CSM, industrial wastes and soils with the number of freeze-thaw cycles according to the CSM grade is shown in Table 7.
In such a structure, grains of crushed stone formed a spatial skeleton, the voids in which are filled with fine aggregate (sand), as shown in Fig.9.
In such a structure there are not enough crushed stone grains to form a spatial skeleton; therefore, they are moved apart from one another by a layer of fine aggregate.
The results show that the frost resistance coefficient of CSM decreases regularly with the increase of the number of freeze-thaw cycles.
Online since: July 2023
Authors: Aser Yalindua, Metilistina Sasinggala, Fione Yalindua
Group I consists of accession numbers 5 and 6 (Talaut Island) and accession numbers 7, 8, 13, 16 and 17 (South Minahasa Regency).
Group II consists of accessions numbered 1,2,3,4, 19, 20, and 21 (Tondano) and accession numbers 9, 10, 11, 12, 14, and 15 (Tomohon) and accession number 18 (South Minahasa).
Taro is high in carbohydrates, protein, minerals, vitamins, contains low starch grains and is easy to digest, so it is good for digestive health and safe for toddlers.
Accession numbers 9, 10, 11, 12, 14, and 15 taros from Tomohon, and accession number 18 from South Minahasa.
Whereas group II consist of accessions numbered 1,2,3,4, 19, 20, and 21 taro from Tondano, accession numbers 9, 10, 11, 12, 14, and 15 taro from Tomohon, and accession number 18 from South Minahasa.
Group II consists of accessions numbered 1,2,3,4, 19, 20, and 21 (Tondano) and accession numbers 9, 10, 11, 12, 14, and 15 (Tomohon) and accession number 18 (South Minahasa).
Taro is high in carbohydrates, protein, minerals, vitamins, contains low starch grains and is easy to digest, so it is good for digestive health and safe for toddlers.
Accession numbers 9, 10, 11, 12, 14, and 15 taros from Tomohon, and accession number 18 from South Minahasa.
Whereas group II consist of accessions numbered 1,2,3,4, 19, 20, and 21 taro from Tondano, accession numbers 9, 10, 11, 12, 14, and 15 taro from Tomohon, and accession number 18 from South Minahasa.
Online since: November 2024
Authors: Ojo Sunday Isaac Fayomi, Joshua O. Atiba, Alima. O Derek
The SEM (Scanning Electron Microscope) image of Zn-MnO2 showed aggregates of clustered grains, thus, no possible fracture lines were observed on the coating surface.
The Brinell hardness numbers of the materials were then calculated using Eq. 1.
The emergence of smaller grain sizes with the rising particulate content of Zn-MnO2 can also be identified as a factor contributing to the elevation in hardness values observed in the fabricated sample.
Brinell Hardness of Zn-MnO2 Coated Samples 4 Conclusion The research findings highlight the efficacy of the Zn-6MnO2 coating, as evidenced by a mass gain of 0.3g, which indicates increased coating thickness aided by additives, stimulating grain and boundary expansion, and overall property enhancement.
The Brinell hardness numbers of the materials were then calculated using Eq. 1.
The emergence of smaller grain sizes with the rising particulate content of Zn-MnO2 can also be identified as a factor contributing to the elevation in hardness values observed in the fabricated sample.
Brinell Hardness of Zn-MnO2 Coated Samples 4 Conclusion The research findings highlight the efficacy of the Zn-6MnO2 coating, as evidenced by a mass gain of 0.3g, which indicates increased coating thickness aided by additives, stimulating grain and boundary expansion, and overall property enhancement.
Online since: August 2009
Authors: Yong Wang, Yu Hua Chen, Zheng Fang Wang
The result shows that peak temperature of the coarse grain in heat affected zone
(CGHAZ) of in-service welding is similar to air cooling welding, but the cooling time of t8/5, t8/3 and
t8/1 decreases at certain degree.
w /. ) µ µ (PrRe d λ .α = (2) there µλ ,,Re,Pr represent conductivity factor, Reynolds number, Prandtl number and kinematic viscosity of gas.
w /. ) µ µ (PrRe d λ .α = (2) there µλ ,,Re,Pr represent conductivity factor, Reynolds number, Prandtl number and kinematic viscosity of gas.
Online since: February 2023
Authors: Wan Zairani Wan Bakar, Arina Sauki, Mohd Fazril Irfan Ahmad Fuad, Nur Shuhadah Japperi, Zulhelmi Amir
However, the software requires a number of parameters estimates such as organic content, disposal data and rates, site closure dates, expansion schedules or collection efficiencies and knowledge of waste composition.
Porosity of rock varies with lithology type, grain shape and sorting as well as cementation between grains.
Hence, for the purpose of simulation on Air Hitam Landfill, the porosity values were varied between 20% to 40% considering the decomposition of the solid waste into the soil with less sandstone grains that normally encountered in oil and gas reservoirs.
Porosity of rock varies with lithology type, grain shape and sorting as well as cementation between grains.
Hence, for the purpose of simulation on Air Hitam Landfill, the porosity values were varied between 20% to 40% considering the decomposition of the solid waste into the soil with less sandstone grains that normally encountered in oil and gas reservoirs.