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Online since: March 2008
Authors: Jean Marie Dubois, V. Fournée, Marie Geneviève Barthés-Labrousse
Surface studies in UHV require the use of large single grains (few mm at least).
Most CMAs have a non-congruent melting and the growth of single grains is not an easy task.
As a result, only a limited number of systems have been studied so far.
The number of surface studies on periodic CMA is more limited so far.
Moreover, no effect of surface orientation or grain boundaries on the final (saturated) state was evidenced when comparing single grain Al63Cu24Fe13 and hot isostatically pressed (multiple grain) Al66Cu22Fe12 samples.
Most CMAs have a non-congruent melting and the growth of single grains is not an easy task.
As a result, only a limited number of systems have been studied so far.
The number of surface studies on periodic CMA is more limited so far.
Moreover, no effect of surface orientation or grain boundaries on the final (saturated) state was evidenced when comparing single grain Al63Cu24Fe13 and hot isostatically pressed (multiple grain) Al66Cu22Fe12 samples.
Online since: August 2012
Authors: Hui Fan, Yin Hui Huang
Laminated templates electro-deposition (LTE) is a new manufacturing technique aimed at a highly precise and low-cost fabrication of metallic structures through a number of planar template-patterned depositing.
Since a number of planar depositing are performed in turn, the surface quality of one single depositing will determine whether the next round runs well and what level of precision the finish part can have.
Therefore metallic grains forming here enjoys a higher possibility to grow into protuberances and cluster-like crystal with big size at an over-increased growth rate[4].
Since a number of planar depositing are performed in turn, the surface quality of one single depositing will determine whether the next round runs well and what level of precision the finish part can have.
Therefore metallic grains forming here enjoys a higher possibility to grow into protuberances and cluster-like crystal with big size at an over-increased growth rate[4].
Online since: October 2024
Authors: Cristian-Vladimir Besalic, Alexandru Nicolae Luca, Rodica Bădărău, Cristan Ghera, Gabriela-Victoria Mnerie, Lia-Nicoleta Botila
A number of variables are investigated in order to determine how they affect the cavitation resistance of the welded joints, including mechanical attributes, welding parameters, and microstructural features.
FSW has a number of benefits, such as decreased distortion, enhanced mechanical qualities, and better microstructural features in the welded joints.
Retrieved from [URL] [8] Liu, M., & Zhang, S., Analysis of Microstructure and Grain Boundary Effects on Cavitation Resistance, Acta Materialia, 22(1) (2018) 89-104
FSW has a number of benefits, such as decreased distortion, enhanced mechanical qualities, and better microstructural features in the welded joints.
Retrieved from [URL] [8] Liu, M., & Zhang, S., Analysis of Microstructure and Grain Boundary Effects on Cavitation Resistance, Acta Materialia, 22(1) (2018) 89-104
Online since: November 2012
Authors: Ji Ting Ma
Apart from this, the elimination of grain and oil-vote system, the establishment of housing system and so on, all of which have contributed to provide a greater free corridor for the flow of urban-rural migration.
Among them the rural elderly empty-nest households has 11.2 million, accounting for 71.58% of the total number of the elderly empty-nest households.
The large number of migrant workers returning to the countryside, however, has caused a shock to the balance in the local employment situation, which was already weak.
The pattern of the original village and township enterprises economy has been weakened significantly in a number of coastal cities already.
The fundamental one is that it’s located in the Yangtze River Delta economic zone which enjoys a number of economic priority policies.
Among them the rural elderly empty-nest households has 11.2 million, accounting for 71.58% of the total number of the elderly empty-nest households.
The large number of migrant workers returning to the countryside, however, has caused a shock to the balance in the local employment situation, which was already weak.
The pattern of the original village and township enterprises economy has been weakened significantly in a number of coastal cities already.
The fundamental one is that it’s located in the Yangtze River Delta economic zone which enjoys a number of economic priority policies.
Online since: October 2013
Authors: Yu Hui Hu, Shu Li Wang, Han Bing Wu
In the 21st Century, the increasing economic globalization, technological revolution, and economic restructuring not only makes great changes to the production and living styles of people, but also causes a number of social and environmental issues, even deterioration of the ecological environment.
(6) Indicators related to social benefit (B6) ① Employment indicator (C61): (9) Wherein: Sli refers to the proportion of employment in the i industry, and Li refers to the average number of employees in the i industry.
The lakeside hilly area beside Poyang Lake may, based on the terrain and landform, develop the comprehensive development model integrating “top for forestry, middle for husbandry and bottom for agriculture” and develop the ecological mode of “forestry-husbandry-grain and forestry-fruit-trade”.
The ecological model of “swine-pond-fruit and fishery-grain-vegetable” is applicable to ecological economy in the countryside courtyard.
The Poyang Lake Zone will integrate the agricultural production base, modern ecological agriculture base, grain production and increment base, green and organic food production base. 3.3.2 New industry Poyang Lake needs to develop new industry.
(6) Indicators related to social benefit (B6) ① Employment indicator (C61): (9) Wherein: Sli refers to the proportion of employment in the i industry, and Li refers to the average number of employees in the i industry.
The lakeside hilly area beside Poyang Lake may, based on the terrain and landform, develop the comprehensive development model integrating “top for forestry, middle for husbandry and bottom for agriculture” and develop the ecological mode of “forestry-husbandry-grain and forestry-fruit-trade”.
The ecological model of “swine-pond-fruit and fishery-grain-vegetable” is applicable to ecological economy in the countryside courtyard.
The Poyang Lake Zone will integrate the agricultural production base, modern ecological agriculture base, grain production and increment base, green and organic food production base. 3.3.2 New industry Poyang Lake needs to develop new industry.
Online since: January 2010
Authors: Wolfgang Schneider, Kai F. Karhausen
One
of the characteristics of aluminium alloys is that a number of final strip properties are influenced
considerably already at very early process stages.
The same is true for all other variables, which describe a given material state, such as crystal orientation, state of dissolution, particle constitution, -size, grain size, etc..
A number of micro-models also interact where simultaneous reactions occur, e.g. the state of precipitation/solute level and nucleation of recrystallisation is strongly inter-linked.
In both models, a number of material models is incorporated in a fully coupled mode.
Technol. 123 (2002) p.155 [10] M.Crumbach, G.Pomana, P.Wagner, G.Gottstein, Recrystallisation and Grain Growth - Conf.
The same is true for all other variables, which describe a given material state, such as crystal orientation, state of dissolution, particle constitution, -size, grain size, etc..
A number of micro-models also interact where simultaneous reactions occur, e.g. the state of precipitation/solute level and nucleation of recrystallisation is strongly inter-linked.
In both models, a number of material models is incorporated in a fully coupled mode.
Technol. 123 (2002) p.155 [10] M.Crumbach, G.Pomana, P.Wagner, G.Gottstein, Recrystallisation and Grain Growth - Conf.
Online since: July 2011
Authors: Jin Hong Gao
In domestic Chinese traditional medicine researches, there are a great number of them on medicinal materials authenticity identification and quality evaluation [1-4].
Material: 8 kinds of Radix Cynanchi Paniculati medicines from different locations Dry the sample in the oven, and then, grind them into fine and even powder with grain of 200 meshes.
Additionally, in order to get the reliable classification result, the sample number is normally 3 more than the number of characteristics, 10 is desirable.
Furthermore, differences in number may influence the stability of calculation.
In the table, number 1, 2, 3, 4, 5, 6, 7, 8 samples are respectively from: Guangdong, Beijing, Henan, Anhui, Shanxi, Hunan, medicine company and medicine market (7 and 8 are the samples with unknown locations).
Material: 8 kinds of Radix Cynanchi Paniculati medicines from different locations Dry the sample in the oven, and then, grind them into fine and even powder with grain of 200 meshes.
Additionally, in order to get the reliable classification result, the sample number is normally 3 more than the number of characteristics, 10 is desirable.
Furthermore, differences in number may influence the stability of calculation.
In the table, number 1, 2, 3, 4, 5, 6, 7, 8 samples are respectively from: Guangdong, Beijing, Henan, Anhui, Shanxi, Hunan, medicine company and medicine market (7 and 8 are the samples with unknown locations).
Online since: October 2011
Authors: Wen Hua Zeng, Guang Ming Li, Jian Feng Zhao, Min Liu
So as the grain of parallel different, PGAs can be divided in four methods[7]: Simple PGA (SPGA), Master-slave PGA (MPGA), Island PGA (IPGA) and Cell PGA (CPGA).
Alg. 1 pseudo-code of SMRPGA function mapper() { runs GA; // identify GA is ran on Mapper ejects the result to Reducer; } function reducer(key, value) { foreach(key) { // choose the best result if(value[key] is better than best_value) { replace the best_value with value[key]; } } eject the best_value; } main() { set input method; //set input nothing set output method; // set the output position of result set Mapper; // set Mappers’ number set Reducer; // set Reducer’s number 1 submit job; } Implementation and Experiment Sets MapReduce environment.
So the number of all possible passwords are MJ. 2) Mountain function[9] This function is very simple and the maximum value is 1 when x=1.
Parameters setting are as the following: 1) Password function Length of password J = 10; The number of character M = 8; Only one individual is set in population since password function is no hinting.
When f(x) doesn’t equal to 1, GA randomly selects one character and replaces it with a random character. 2) Mountain function Domain N = 20; The number of people = 200; The length of gene = 63; Crossover factor = 0.2; Mutation factor = 0.1; Fig. 2 The speed-up of SMRPGA for password function (left) Fig. 3 The speed-up of SMRPGA for mountain function (right) Figure 2 and figure 3 display the variation of iteration times and running time with the change of Mappers’ number, at the same time display the speed-up of two ways: iteration times and wall clock time.
Alg. 1 pseudo-code of SMRPGA function mapper() { runs GA; // identify GA is ran on Mapper ejects the result to Reducer; } function reducer(key, value) { foreach(key) { // choose the best result if(value[key] is better than best_value) { replace the best_value with value[key]; } } eject the best_value; } main() { set input method; //set input nothing set output method; // set the output position of result set Mapper; // set Mappers’ number set Reducer; // set Reducer’s number 1 submit job; } Implementation and Experiment Sets MapReduce environment.
So the number of all possible passwords are MJ. 2) Mountain function[9] This function is very simple and the maximum value is 1 when x=1.
Parameters setting are as the following: 1) Password function Length of password J = 10; The number of character M = 8; Only one individual is set in population since password function is no hinting.
When f(x) doesn’t equal to 1, GA randomly selects one character and replaces it with a random character. 2) Mountain function Domain N = 20; The number of people = 200; The length of gene = 63; Crossover factor = 0.2; Mutation factor = 0.1; Fig. 2 The speed-up of SMRPGA for password function (left) Fig. 3 The speed-up of SMRPGA for mountain function (right) Figure 2 and figure 3 display the variation of iteration times and running time with the change of Mappers’ number, at the same time display the speed-up of two ways: iteration times and wall clock time.
Online since: November 2010
Authors: Cong Cong Yin, Hong Bin Qi, Xiao Chao Chen, Zhi Hui Wang
The size of silica depends on the type of silicon alkoxide and alcohool, a large number of studies were conducted indicating that particles prepared in methanol solutions were the smallest [5].The main disadvantage of this method was the wide range of particle size distribution.
Infrared absorption spectra of samples were measured using infrared spectrometer (NICOLET 750), using KBr tablet method, test wave number ranged between 4000 and 400 cm-1.
Table 2 Orthogonal experiment table Sample numbers Concentration of silica-rich filtrate C[°Bé] Surfactant dosage ω[%] Reaction temperature T1[℃] Calcinations temperature T2[℃] NS-1 8.8 2.0 45 500 NS-2 8.8 5.0 60 600 NS-3 8.8 8.0 75 700 NS-4 11.9 2.0 60 700 NS-5 11.9 5.0 75 500 NS-6 11.9 8.0 45 600 NS-7 14.7 2.0 75 600 NS-8 14.7 5.0 45 700 NS-9 14.7 8.0 60 500 Fig.1 illustrated the morphology and particle size which were characterized by field emission scanning electron microscopy (FE-SEM) mentioned in Table 2.
This was because of the liquid medium produced a large number of micro-bubbles when the liquid dispersed by ultrasound, the release of energy to produce cavitations in the micro-bubbles formation and rupture process.
High temperature produced by cavitations and a large number of tiny bubbles on the surface of solid particles greatly weaken the surface free energy of small grains, inhibiting the nucleation agglomerate and larger.
Infrared absorption spectra of samples were measured using infrared spectrometer (NICOLET 750), using KBr tablet method, test wave number ranged between 4000 and 400 cm-1.
Table 2 Orthogonal experiment table Sample numbers Concentration of silica-rich filtrate C[°Bé] Surfactant dosage ω[%] Reaction temperature T1[℃] Calcinations temperature T2[℃] NS-1 8.8 2.0 45 500 NS-2 8.8 5.0 60 600 NS-3 8.8 8.0 75 700 NS-4 11.9 2.0 60 700 NS-5 11.9 5.0 75 500 NS-6 11.9 8.0 45 600 NS-7 14.7 2.0 75 600 NS-8 14.7 5.0 45 700 NS-9 14.7 8.0 60 500 Fig.1 illustrated the morphology and particle size which were characterized by field emission scanning electron microscopy (FE-SEM) mentioned in Table 2.
This was because of the liquid medium produced a large number of micro-bubbles when the liquid dispersed by ultrasound, the release of energy to produce cavitations in the micro-bubbles formation and rupture process.
High temperature produced by cavitations and a large number of tiny bubbles on the surface of solid particles greatly weaken the surface free energy of small grains, inhibiting the nucleation agglomerate and larger.
Online since: September 2011
Authors: Jing Hai Zhou, Xian Hong Meng, Yu Xian Zhang, Ying Liu
Specimens are molded by wooden pattern, made close-grained by earthquake toppled and is removed after 24h.
Table.1 Experimental result of uncorroded specimens group 1 2 3 stress level S1=0.75 S1=0.75 number (MPa) number Nf number (MPa) result 1-1 1-2 1-3 1-4 1-5 1-6 30.39 28.09 29.82 31.58 32.44 26.15 2-1 2-2 2-3 13581 12339 14761 3-1 3-2 3-3 24.96 26.11 25.98 average 29.74 13561 25.68 Table.2 Experimental result of corroded specimens group 4 5 6 stress level S1=0.75 S1=0.75 number (MPa) number Nf number (MPa) result 4-1 4-2 4-3 4-4 4-5 4-6 27.51 26.93 28.84 27.93 26.29 28.16 5-1 5-2 5-3 9891 10281 9933 6-1 6-2 6-3 21.03 21.47 23.76 average 27.62 10035 22.09 P - R - N Curve.
Table.1 Experimental result of uncorroded specimens group 1 2 3 stress level S1=0.75 S1=0.75 number (MPa) number Nf number (MPa) result 1-1 1-2 1-3 1-4 1-5 1-6 30.39 28.09 29.82 31.58 32.44 26.15 2-1 2-2 2-3 13581 12339 14761 3-1 3-2 3-3 24.96 26.11 25.98 average 29.74 13561 25.68 Table.2 Experimental result of corroded specimens group 4 5 6 stress level S1=0.75 S1=0.75 number (MPa) number Nf number (MPa) result 4-1 4-2 4-3 4-4 4-5 4-6 27.51 26.93 28.84 27.93 26.29 28.16 5-1 5-2 5-3 9891 10281 9933 6-1 6-2 6-3 21.03 21.47 23.76 average 27.62 10035 22.09 P - R - N Curve.