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Online since: September 2019
Authors: Hanna Belghit, Toufik Ziar, Fares Serradj, Abd Elouahab Noua, Mourad Khechba, Hichem Farh
The results revealed that the distributions of grains are elongated along the rolling direction.
These micrographs show the typical distribution of the grains, which are elongated mainly along the rolling direction.
These dislocations, present in large numbers, constitute preferential sites for the germination and the growth of the phases, which accelerates the kinetics of their precipitation [31, 33].
The evaluation of the results obtained on un-deformed and deformed alloy by cold rolling allowed us to make the following conclusions: ü The distributions of the grains are elongated along the rolling direction.
These micrographs show the typical distribution of the grains, which are elongated mainly along the rolling direction.
These dislocations, present in large numbers, constitute preferential sites for the germination and the growth of the phases, which accelerates the kinetics of their precipitation [31, 33].
The evaluation of the results obtained on un-deformed and deformed alloy by cold rolling allowed us to make the following conclusions: ü The distributions of the grains are elongated along the rolling direction.
Online since: March 2011
Main topics covered by the program were: experimental methods, including neutron and
synchrotron radiation residual stress analysis, strain mapping, in situ analysis, microstrain
studies, texture-stress relationships, residual stress modelling and computation,
generation of residual stresses by manufacturing and processing of materials, residual
stresses in thin films, coatings and in multiphase materials, residual stresses and phase
transformations, grain interaction mechanisms and elasto-plastic behaviour of materials,
multiscale modelling and scale bridging aspects.
We are also in debt with a number of colleagues, also not participating in the event, who kindly agreed to peer-review all papers: confidentiality prevents us from listing their names.
We are also in debt with a number of colleagues, also not participating in the event, who kindly agreed to peer-review all papers: confidentiality prevents us from listing their names.
Online since: December 2012
Authors: A.M. Adaskina, S.N. Grigoriev, A.A. Vereschaka, A.S. Vereschaka, V.V. Kashirtsev
Introduction
Operating conditions of machines,equipment,facilities in a number of industrial branches are characterised by elevated temperatures and demand application of the heat resisting materials keeping necessary properties at heating.
Hardness was determined on special installation on equidistributed estimate hardness value after 3...5 measurements.An error- ±10%.Strength bending test(σbs)defined at room temperature on installation CDМU-30,at the raised temperatures-on installation"Instron Dynatup".Samples 5×5×35 mm used at five doubles of tests,the error made±15%.For determining of porosity and size of the carbide grains used standard techniques.
Composition of binder in the grades WRK10 and WRK15,at equal rhenium concentrations in the binder is same.Therefore the properties difference in these alloys is determined by the number of binders.The more the carbide binder phase,the stronger the carbide,but its hardness is lower.Indeed,for all testing temperatures carbide hardness such as WRK10 above and their strength is lower(Fig.2 and 3).
While the hardness of carbide grades such as WRK for all investigated temperatures was higher than that of carbide grade WK8,despite the fact that the number of the binder-phase,which reduces the hardness of cemented carbide,in these carbide is more(in carbide grade WRK15- nearly double)than in grade WK8.
Hardness decreases with increasing rhenium content up to 70%in the binder due, apparently,to technological factors.Rhenium,compared with cobalt,has larger values of the modulus of elasticity(470 and 217 GPa,respectively)compressive strength,(2000 and 1300 MPa, respectively), the content of rhenium increase in Co-Re carbide reduces their flexibility.Production of carbide requires a large power consumption,i.e.primarily increasing the sintering temperature,invokes carbide particles size increase from 1.5 to 2.5 mm(average) and reduces the high-temperature strength(heat endurance),since for alloys,intended for short- term use at high temperatures(cutting tool)fine-grained structure is optimal,reinforced with fine particles of the second phase[1],in this case,the carbide.
Hardness was determined on special installation on equidistributed estimate hardness value after 3...5 measurements.An error- ±10%.Strength bending test(σbs)defined at room temperature on installation CDМU-30,at the raised temperatures-on installation"Instron Dynatup".Samples 5×5×35 mm used at five doubles of tests,the error made±15%.For determining of porosity and size of the carbide grains used standard techniques.
Composition of binder in the grades WRK10 and WRK15,at equal rhenium concentrations in the binder is same.Therefore the properties difference in these alloys is determined by the number of binders.The more the carbide binder phase,the stronger the carbide,but its hardness is lower.Indeed,for all testing temperatures carbide hardness such as WRK10 above and their strength is lower(Fig.2 and 3).
While the hardness of carbide grades such as WRK for all investigated temperatures was higher than that of carbide grade WK8,despite the fact that the number of the binder-phase,which reduces the hardness of cemented carbide,in these carbide is more(in carbide grade WRK15- nearly double)than in grade WK8.
Hardness decreases with increasing rhenium content up to 70%in the binder due, apparently,to technological factors.Rhenium,compared with cobalt,has larger values of the modulus of elasticity(470 and 217 GPa,respectively)compressive strength,(2000 and 1300 MPa, respectively), the content of rhenium increase in Co-Re carbide reduces their flexibility.Production of carbide requires a large power consumption,i.e.primarily increasing the sintering temperature,invokes carbide particles size increase from 1.5 to 2.5 mm(average) and reduces the high-temperature strength(heat endurance),since for alloys,intended for short- term use at high temperatures(cutting tool)fine-grained structure is optimal,reinforced with fine particles of the second phase[1],in this case,the carbide.
Online since: October 2011
Authors: Jin Hai Zhang
It is hard to remember complex passwords, simple passwords, such as birthdays, telephone numbers and very easy to guess or decipher.
Research present situation The fingerprint recognition algorithm is the automatic fingerprint recognition system (AFIS) the core technologies, this aspect's research as early as started in the early 19th century, the scientific research had discovered fingerprint two key characters; first, two different finger's fingerprint grain keel's model (ridge pattern) different, other one is the fingerprint grain keel's model life-long does not change.
Based on Delaunay (DT) triangular network matching method, the accuracy of this method is very high, in order to further improve the matching accuracy and reduce the matching time, we made some improvements of its base, respectively, and the triangle to its edge characteristics feature dimension was expanded by adding a feature point type and the unique characteristics of triangular points of the current details of the ridge orientation and the angle of the corners, DT in the use of such reference points on the network when looking for matches, thus greatly reducing the appearance of pseudo-feature points, in the global matching stage reduces the amount of pseudo-matching data, the accuracy of matching has been further improved, especially in the matching speed , the reduction of a large number of false feature data so that it matches the speed has been greatly improved, the algorithm flow shown in Fig. 1.
Fingerprint matching algorithm process Test results and analysis This paper designed in this paper the original algorithm and improved algorithm is applied to the development of this platform for automatic fingerprint recognition was tested, based on the practical requirements of the algorithm to do two tests. (1) Based on the low latency requirements, the algorithm discarded the correct match link, directly through the statistical match to determine the number of triangular matching of fingerprints. (2) the high recognition rate based on the requirements, in strict accordance with the original algorithm, after correction treatment, then the match judge.
Research present situation The fingerprint recognition algorithm is the automatic fingerprint recognition system (AFIS) the core technologies, this aspect's research as early as started in the early 19th century, the scientific research had discovered fingerprint two key characters; first, two different finger's fingerprint grain keel's model (ridge pattern) different, other one is the fingerprint grain keel's model life-long does not change.
Based on Delaunay (DT) triangular network matching method, the accuracy of this method is very high, in order to further improve the matching accuracy and reduce the matching time, we made some improvements of its base, respectively, and the triangle to its edge characteristics feature dimension was expanded by adding a feature point type and the unique characteristics of triangular points of the current details of the ridge orientation and the angle of the corners, DT in the use of such reference points on the network when looking for matches, thus greatly reducing the appearance of pseudo-feature points, in the global matching stage reduces the amount of pseudo-matching data, the accuracy of matching has been further improved, especially in the matching speed , the reduction of a large number of false feature data so that it matches the speed has been greatly improved, the algorithm flow shown in Fig. 1.
Fingerprint matching algorithm process Test results and analysis This paper designed in this paper the original algorithm and improved algorithm is applied to the development of this platform for automatic fingerprint recognition was tested, based on the practical requirements of the algorithm to do two tests. (1) Based on the low latency requirements, the algorithm discarded the correct match link, directly through the statistical match to determine the number of triangular matching of fingerprints. (2) the high recognition rate based on the requirements, in strict accordance with the original algorithm, after correction treatment, then the match judge.
Online since: August 2014
Authors: Tomasz Sadowski, Daniel Pietras
According to EN14227: 2004 for “Hydraulically bond mixtures” the grain-size distribution curve should be included between two limiting curves, Fig. 2.
Grain-size distribution curve.
Fig. 6b shows distribution of the corresponding to cycle numbers (N) for both types of the materials, i.e. without small rubber particles and with the rubber filler.
a) Cyclic compression test b) damage parameter in function of cycle number N 3-point bending displacement controlled cyclic test The displacement controlled cyclic bending tests (Fig. 7) were carried out with keeping the minimal force during after unloading equal to 20N.
Crack propagation problem with application of the cohesive zone model ([8-10]) will be the next step in description of the rubberized lean concrete, Acknowledgement 1) This work was financially supported by Ministry of Science and Higher Education within the statutory research number S/20/2013. 2) Participant of the project: "Qualifications for the labour market - employer friendly university", co-financed by European Union from European Social Fund.
Grain-size distribution curve.
Fig. 6b shows distribution of the corresponding to cycle numbers (N) for both types of the materials, i.e. without small rubber particles and with the rubber filler.
a) Cyclic compression test b) damage parameter in function of cycle number N 3-point bending displacement controlled cyclic test The displacement controlled cyclic bending tests (Fig. 7) were carried out with keeping the minimal force during after unloading equal to 20N.
Crack propagation problem with application of the cohesive zone model ([8-10]) will be the next step in description of the rubberized lean concrete, Acknowledgement 1) This work was financially supported by Ministry of Science and Higher Education within the statutory research number S/20/2013. 2) Participant of the project: "Qualifications for the labour market - employer friendly university", co-financed by European Union from European Social Fund.
Online since: May 2012
Authors: Jian Hua Lü, Xin Hong Su, Yue Guang Du
Introduction
The cigarette beetle, Lasioderma serricorne (Fabricius) (Coleoptera: Anobiidae) is one of the most serious pest of stored tobacco, tobacco products, cereal grains and processed foods in the world (Kaelina et al., 1999; Papadopoulou and Athanassiou, 2004).
Many Chinese herbal plants are potential sources of pesticides and have exhibited potent toxic bioactivity to stored-grain insects (Yang and Tang, 1988; Wang et al., 2006; Liu et al., 2007).
The L. serricorne pupae were then kept in culture environment, and the number of adults which successfully developed from pupae was recorded everyday during the following 7 days.
Each microwell was numbered.
The observation of the egg hatching condition was made with a stereomicroscope, and the number of eggs hatching into larvae was recorded everyday during the following 7 days.
Many Chinese herbal plants are potential sources of pesticides and have exhibited potent toxic bioactivity to stored-grain insects (Yang and Tang, 1988; Wang et al., 2006; Liu et al., 2007).
The L. serricorne pupae were then kept in culture environment, and the number of adults which successfully developed from pupae was recorded everyday during the following 7 days.
Each microwell was numbered.
The observation of the egg hatching condition was made with a stereomicroscope, and the number of eggs hatching into larvae was recorded everyday during the following 7 days.
Online since: April 2010
Authors: Wen Yuan Xu, Lu Bin Wei, Ming Biao Luo, Yun Hai Liu, Hai Lu Lin
It is noted that the grain size of film
increased with the Y
3+ content increasing.
The contact angle of water on 4% Y doped TiO2 films decreased with number of layer of film increasing.
With the number of film layer increasing, the absorption of film to ultraviolet light and the hydrophilic substance on the film increased, which was advantageous to hydrophilicity.
Tab.1 Effect of film thickness on the contact angle Number of layer 1 2 3 4 5 Contact angle (°) 21 14 11 7 0 Fig. 6.
The SEM observation showed the grain size of film increased with the Y 3+ content increasing.
The contact angle of water on 4% Y doped TiO2 films decreased with number of layer of film increasing.
With the number of film layer increasing, the absorption of film to ultraviolet light and the hydrophilic substance on the film increased, which was advantageous to hydrophilicity.
Tab.1 Effect of film thickness on the contact angle Number of layer 1 2 3 4 5 Contact angle (°) 21 14 11 7 0 Fig. 6.
The SEM observation showed the grain size of film increased with the Y 3+ content increasing.
Online since: July 2008
Authors: G.F. Zhang, X.D. Hou, N. Ren, Y. Ren, Volker Buck
Generally, a large number of argon in the mixture gas can result in a growth of nano-crystalline
diamond films.
Only ball-like grains formed on the mirror-polished silicon at a bias voltage of 80V for 30 min (see fig.3a).
Fig. 1 The morphology of the films deposited on the substrates which (a) was grounded and (b) floated Owing to a high ion density in the ICP source, which was in the order of 1011cm-3 measured by Langmuir probe, a large number of hydrocarbon radicals reached the substrate surface under negative bias conditions, resulting in the nucleation and growth of pyramidal crystals in the scratches.
The number of particles arriving on the substrate surface or the size of the pyramid-like carbon crystals was in direct proportion to the bias voltage.
But the pyramid-like grains appeared on the edges of substrates and were amorphous.
Only ball-like grains formed on the mirror-polished silicon at a bias voltage of 80V for 30 min (see fig.3a).
Fig. 1 The morphology of the films deposited on the substrates which (a) was grounded and (b) floated Owing to a high ion density in the ICP source, which was in the order of 1011cm-3 measured by Langmuir probe, a large number of hydrocarbon radicals reached the substrate surface under negative bias conditions, resulting in the nucleation and growth of pyramidal crystals in the scratches.
The number of particles arriving on the substrate surface or the size of the pyramid-like carbon crystals was in direct proportion to the bias voltage.
But the pyramid-like grains appeared on the edges of substrates and were amorphous.
Online since: January 2013
Authors: Kun Zhang, Hai Feng Wang, Sheng Pei Dai
U.S. researchers even proposed and implemented the concept of "electronic nose chip (Nose on a chip)", as the Same trend Market-oriented practicality convenient micro-electronic nose will be a large number of popular applications.
Because of these handheld electronic nose technology products with low-price, low-power, portable, versatile, able-site real-time detection features, so it has the advantage of a large number of popular general users, Become a universal user and market demand, to be able to have good prospects for the development of the industry market.
Domestic Technology Development and Research China's electronic nose technology research start later than overseas, But now, the number Of study the electronic nose is growing.
Optimization of sensor array of electronic nose and its application to detection of storage age of wheat grain[J] Transactions of the Chinese Society of Agricultural Engineering.2006.22(12):164-167
Electronic nose for microbial quality classification of grains.1997, Elsevier. 187-193
Because of these handheld electronic nose technology products with low-price, low-power, portable, versatile, able-site real-time detection features, so it has the advantage of a large number of popular general users, Become a universal user and market demand, to be able to have good prospects for the development of the industry market.
Domestic Technology Development and Research China's electronic nose technology research start later than overseas, But now, the number Of study the electronic nose is growing.
Optimization of sensor array of electronic nose and its application to detection of storage age of wheat grain[J] Transactions of the Chinese Society of Agricultural Engineering.2006.22(12):164-167
Electronic nose for microbial quality classification of grains.1997, Elsevier. 187-193
Online since: March 2015
Authors: Xing Han, Jian Zhong Cui
It can be seen that some needle-like eutectic silicon crystals (white part) are distributed at the boundaries of the coarse α-Al grains (black part) in 4045 alloy; whereas some phases containing manganese (white parts) are embedded in the α-Al matrix (black part) in 3004 alloy.
It can be seen that some needle-like eutectic silicon crystals (white part) are distributed at the boundaries of the coarse α-Al grains (black part) in 4045 alloy; whereas some phases containing manganese (white parts) are embedded in the α-Al matrix (black part) in 3003 alloy.
Acknowledge The authors gratefully acknowledge the supports of the National Basic Research Program of China (Grant number 2012CB723307-03), the National Science Foundation for the Youth (Grant number 51204046) and the doctoral foundation of China Ministry of Education (Grant number 20130042130001) Reference [1] M.
It can be seen that some needle-like eutectic silicon crystals (white part) are distributed at the boundaries of the coarse α-Al grains (black part) in 4045 alloy; whereas some phases containing manganese (white parts) are embedded in the α-Al matrix (black part) in 3003 alloy.
Acknowledge The authors gratefully acknowledge the supports of the National Basic Research Program of China (Grant number 2012CB723307-03), the National Science Foundation for the Youth (Grant number 51204046) and the doctoral foundation of China Ministry of Education (Grant number 20130042130001) Reference [1] M.