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Online since: April 2014
Authors: Zhi Kun Guo, Fei Shao, Dan Wang, Wan Xiang Chen
The A1 ~ A8, A11, A19 and A22 number of test specimens respectively conduct an impact test and make its destruction, the bullet fired pressure is between 0.40 MPa to 0.60 MPa, strain rate range of 60 ~ 110s; 2.
The A12 ~ A17 number of test specimens conduct the constant pressure multiple impact test to destruction, the bullet fired pressure is 0.25 MPa; 3.
The A9, A10, A18 ~ A21 number of specimens conduct increasing pressure multiple impact test to destruction, the bullet fired pressure is 0.20MPa to 0.45MPa.
This is because a large number of micro cracks exist within the concrete material, thus its damage caused by the combined action of strain rate hardening effect and damage softening effect.
This is decided by the internal structure of the HPP hybrid fiber reinforced lightweight aggregate concrete materials, when the concrete material molding, a large number of micro cracks and micro void damage has been distributed around the aggregate and the whole body.
The A12 ~ A17 number of test specimens conduct the constant pressure multiple impact test to destruction, the bullet fired pressure is 0.25 MPa; 3.
The A9, A10, A18 ~ A21 number of specimens conduct increasing pressure multiple impact test to destruction, the bullet fired pressure is 0.20MPa to 0.45MPa.
This is because a large number of micro cracks exist within the concrete material, thus its damage caused by the combined action of strain rate hardening effect and damage softening effect.
This is decided by the internal structure of the HPP hybrid fiber reinforced lightweight aggregate concrete materials, when the concrete material molding, a large number of micro cracks and micro void damage has been distributed around the aggregate and the whole body.
Online since: February 2013
Authors: Sebastian Kot, Beata Ślusarczyk
Therefore, recent years has seen a number of commitments made by the states in order to reduce the adverse effect of manufacturing processes on the environment.
Grain, forest chips or granules are stored in silos.
Furthermore, a great number of deliveries do not meet the humidity requirements.
The increasing number of non-consistent deliveries might also result from lower motivation of suppliers and neglecting the problems of preparation of high-quality biomass.
Analysis of the number of the deliveries that have not met quality requirements should also include the division into the deliveries of agricultural and forestry biomass.
Grain, forest chips or granules are stored in silos.
Furthermore, a great number of deliveries do not meet the humidity requirements.
The increasing number of non-consistent deliveries might also result from lower motivation of suppliers and neglecting the problems of preparation of high-quality biomass.
Analysis of the number of the deliveries that have not met quality requirements should also include the division into the deliveries of agricultural and forestry biomass.
Online since: November 2019
Authors: Andrei F. Balayev, Albert V. Korolev, Boris M. Iznairov
Since the increase in internal energy happens in small portions due to the cyclic loading in the zone of elastic strain, the energy, that reached a critical level, causes plastic shear before the plastic strain of the grains.
Based on this assumption of the obvious geometrical parameters, general deformation is determined by the expression: . (1) According to [21], the value of the relaxed stresses is in direct proportion to the number of loading cycles and magnitude of loading, which determines the nominal process induced deformation.
It should be noted that the number of loading cycles of the workpiece provided by the given setup parameters based on geometric scheme in Fig.1, is determined by the condition: (3) If the number of cycles provided by the geometric setup is not sufficient, i.e., NOTo determine the required number of cycles, it is necessary to find value Dh.
During the setup one must also consider that the smaller the angle of the crossing of the roll axes is, the slower the part moves, and the greater the number of loading cycles is.
Based on this assumption of the obvious geometrical parameters, general deformation is determined by the expression: . (1) According to [21], the value of the relaxed stresses is in direct proportion to the number of loading cycles and magnitude of loading, which determines the nominal process induced deformation.
It should be noted that the number of loading cycles of the workpiece provided by the given setup parameters based on geometric scheme in Fig.1, is determined by the condition: (3) If the number of cycles provided by the geometric setup is not sufficient, i.e., NO
During the setup one must also consider that the smaller the angle of the crossing of the roll axes is, the slower the part moves, and the greater the number of loading cycles is.
Online since: December 2015
Authors: Anurat Wisitsoraat, Sukon Phanichphant, Chawarat Siriwong, Jintaporn Yimchoy, Sangtian Nabsanit
The film thicknesses were varied by controlling the numbers of coating.
A recent study found that chemiresistive semiconducting metal oxides are the most potential candidates for gas sensor because of their low cost, fast response time, high sensitivity and ability to detect large number of gases.
Numerous experiment investigations of nanostructured metal-oxide films revealed a strong increase in sensitivity when the average grain size was reduced to several nanometers.
The film thicknesses were varied by controlling the numbers of coating.
A recent study found that chemiresistive semiconducting metal oxides are the most potential candidates for gas sensor because of their low cost, fast response time, high sensitivity and ability to detect large number of gases.
Numerous experiment investigations of nanostructured metal-oxide films revealed a strong increase in sensitivity when the average grain size was reduced to several nanometers.
The film thicknesses were varied by controlling the numbers of coating.
Online since: July 2006
Authors: Chul Hyun Kim, Hu Chul Lee, Young Hee Cho, Dae Heon Joo
After adding up to 0.5wt% of Mn, a large number of
intermetallic phases, α-Al(Mn,Fe)Si as well as fine Al6(Mn,Fe) particles were
precipitated and a significant improvement in the elevated temperature properties was
achieved.
After the T6 heat treatment, Cu produced a large number of �� precipitates in the matrix, however, over aging at 350� caused the transformation of the �� phase into the rod shaped Q phase, whose composition was identified as Al5Cu2Mg8Si6, and which was too coarse to strengthen the matrix[1].
The addition of Mn also produced small dispersoids consisting of Al6(Mn,Fe), which were precipitated within aluminum cells or grains.
Cu effectively improved the mechanical properties of the Al-Si piston alloys, due to the production of �� precipitates after the T6 heat treatment, as well as the Fig.5 Transmission electron micrographs of Ge added alloy showing (a) High Angle Annular Dark Field Image of �� phase on GeSi precipitates after aging at 160� for 5h ; (b) Schematic EDS diagrams of ��phase and GeSi phase ; (c) ��phase coarsening after aging at 350� for 1h formation of a large number of intermetallics, i.e.
After the T6 heat treatment, Cu produced a large number of �� precipitates in the matrix, however, over aging at 350� caused the transformation of the �� phase into the rod shaped Q phase, whose composition was identified as Al5Cu2Mg8Si6, and which was too coarse to strengthen the matrix[1].
The addition of Mn also produced small dispersoids consisting of Al6(Mn,Fe), which were precipitated within aluminum cells or grains.
Cu effectively improved the mechanical properties of the Al-Si piston alloys, due to the production of �� precipitates after the T6 heat treatment, as well as the Fig.5 Transmission electron micrographs of Ge added alloy showing (a) High Angle Annular Dark Field Image of �� phase on GeSi precipitates after aging at 160� for 5h ; (b) Schematic EDS diagrams of ��phase and GeSi phase ; (c) ��phase coarsening after aging at 350� for 1h formation of a large number of intermetallics, i.e.
Online since: June 2020
Authors: Eleonora Koltsova, Natalia Mamonova, Anna Shaneva, Michael Babkin, Nelly Popova, Eugene Zharikov
Mathematical models were based on the equations of the balance of the number of particles by size taking into account their grinding (for the grinding stage), the balance of pores in the composite by the size (for the sintering stage).
The method of spark plasma sintering is currently one of the most promising sintering methods, providing fast and uniform heating of the composite preform and obtaining a composite with a small grain size and high mechanical properties [1-4].
In this paper, as in [8, 12, 13], we use the equation for the balance of the number of particles in the form (1) where φ is the density distribution of particles by volume; r is the volume of particles; A(r) is the function that determines the probability of the distribution of particles by size (volume) r; t is time; B(r /γ) is the distribution density of a particle of size (volume) r when crushing a particle of size γ at time t.
The basis of the mathematical model of the spark plasma sintering process is the balance equations for the number of pores in a ceramic composite according to their size
The method of spark plasma sintering is currently one of the most promising sintering methods, providing fast and uniform heating of the composite preform and obtaining a composite with a small grain size and high mechanical properties [1-4].
In this paper, as in [8, 12, 13], we use the equation for the balance of the number of particles in the form (1) where φ is the density distribution of particles by volume; r is the volume of particles; A(r) is the function that determines the probability of the distribution of particles by size (volume) r; t is time; B(r /γ) is the distribution density of a particle of size (volume) r when crushing a particle of size γ at time t.
The basis of the mathematical model of the spark plasma sintering process is the balance equations for the number of pores in a ceramic composite according to their size
Online since: December 2012
Authors: Xuan Du, Jian Du, Yu Mei Li, Jin Shi Jian, Can Du
Introduction
In recent year, with the expanding of city size, a large number of farmland have been left uncultivated and the waste soil, rock ballast, household garbage and etc. increase year by year[1, 2]; meanwhile the number and scale of urban sewage plant have both increased gradually[3-6].
Firstly, culture pan were bored and numbered, loaded with a certain amount basis materials (straw 30g, wastes 100g) and weighed (four repetitions).
The prescriptions and water of 100g/pan were added into the soil in culture pan and till the end of infiltration, 15 grains of cotton seeds were placed on each pan and then covered with soil and then the pans were put into artificial climate box.
Number and size of the prehot peach of cotton (generally accounting for 20-30% of total yield) play a decisive role in the high yield and good quality.
Number and quality of the autumn peach of cotton (directly affecting cotton yield) are closely correlated to climatic conditions.
Firstly, culture pan were bored and numbered, loaded with a certain amount basis materials (straw 30g, wastes 100g) and weighed (four repetitions).
The prescriptions and water of 100g/pan were added into the soil in culture pan and till the end of infiltration, 15 grains of cotton seeds were placed on each pan and then covered with soil and then the pans were put into artificial climate box.
Number and size of the prehot peach of cotton (generally accounting for 20-30% of total yield) play a decisive role in the high yield and good quality.
Number and quality of the autumn peach of cotton (directly affecting cotton yield) are closely correlated to climatic conditions.
Online since: April 2010
Authors: Olivier Politano, Sébastien Garruchet, Patrick Arnoux, Vincent Vignal
Moreover they observed the presence of voids in grain boundaries, which are
due to clustered vacancies.
Fig. 2 represents the three kinetics curves which correspond to the number of oxygen atoms into the oxide layer as a function of time.
These curves represent the total number of O atoms uptake in the oxide layer versus time.
Finally, the numbers of oxygen atoms included in the oxide layer follow a linear law.
The 3 numbers are equivalent to those in Fig. 2.
Fig. 2 represents the three kinetics curves which correspond to the number of oxygen atoms into the oxide layer as a function of time.
These curves represent the total number of O atoms uptake in the oxide layer versus time.
Finally, the numbers of oxygen atoms included in the oxide layer follow a linear law.
The 3 numbers are equivalent to those in Fig. 2.
Online since: April 2024
Authors: Achanai Buasri, Sunita Lunsamrong, Nutnicha Wongnak, Gornsikeid Sahavattarnakorn
Additionally, it was observed that starch grains were adhering to the fibers, exhibiting a spherical morphology.
Wave numbers within the range of 2850-3000 cm-1 correspond to the C-H stretching bond, whereas the specific wave number of 1315 cm-1 signifies the presence of a C-H stretching bond.
The wave number falls within the range of 1000-1320 cm-1, indicating the presence of a C-O stretching bond.
The wave number falls within the range of 675-900 cm-1, indicating the presence of a C-H bond within an aromatic group.
The wave number range of RS when compared to RSM exhibits similarities.
Wave numbers within the range of 2850-3000 cm-1 correspond to the C-H stretching bond, whereas the specific wave number of 1315 cm-1 signifies the presence of a C-H stretching bond.
The wave number falls within the range of 1000-1320 cm-1, indicating the presence of a C-O stretching bond.
The wave number falls within the range of 675-900 cm-1, indicating the presence of a C-H bond within an aromatic group.
The wave number range of RS when compared to RSM exhibits similarities.
Online since: February 2014
Authors: Feng Xue, Dong Bo Wei, Xi Xi Luo, Ping Ze Zhang, Yu Chen, Zheng Jun Yao
Some combinations of Nb, Mo, Zr, B and C resulted in refined grain sizes, increased recrystallization temperatures, and improved strength of Fe-28Al-5Cr [5].
The maximum number of electrons is 30.33 at -0.85 eV energy level, and the electron number at the Fermi level is 18.05.
The electron number is 15.62 at the Fermi energy level.
The electron number is 16.25 at the Fermi energy level.
The electron number is 19.04 at the Fermi energy level.
The maximum number of electrons is 30.33 at -0.85 eV energy level, and the electron number at the Fermi level is 18.05.
The electron number is 15.62 at the Fermi energy level.
The electron number is 16.25 at the Fermi energy level.
The electron number is 19.04 at the Fermi energy level.