Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: March 2016
Authors: Yuriy Nikolaevich Kulchin, Aleksandr A. Kuchmizhak, Oleg B. Vitrik, Stanislav O. Gurbatov
Diffusely transmitting object (diffusor), an optically rough 2-mm thick quartz plate with the average grain size of 1 µm, was used to forming a speckle pattern.
It can be seen that the portion of nanojets (as well as microbumps) significantly increased in the structures total number, and through holes portion decreased to 1%.
However, contribution of the great number of individual nanostructures to the total scattering signal is Figure 3.
To save the stochastic nature of the nanostructures location the displacement step is selected by a random number generator.
The figures show that the nanojets quantity increases proportionally to the number of pulses and the presence of microbumps on the surface doesn't hinder the further formation of nanojets on their place.
It can be seen that the portion of nanojets (as well as microbumps) significantly increased in the structures total number, and through holes portion decreased to 1%.
However, contribution of the great number of individual nanostructures to the total scattering signal is Figure 3.
To save the stochastic nature of the nanostructures location the displacement step is selected by a random number generator.
The figures show that the nanojets quantity increases proportionally to the number of pulses and the presence of microbumps on the surface doesn't hinder the further formation of nanojets on their place.
Online since: April 2008
Authors: Andriy O. Koval'chuk, Andriy Gusak, V.F. Mazanko, D.S. Gertsriken
They are as follows:
( )ηηηηηη
XXXXXX
X EcEczE +
= , (9)
() ()
[]
ηη
ηη
ηηη
η
η
BBBAAAABBA
V EcEcEcc
z
E
2
2
2
2
++⋅−= , (10)
where ηXYE - pair interaction energy of species X and Y, ηz - NN number in corresponding phase
and X denotes the another species relatively to X .
For the concentration change (of B-species) in plane n: 1 1 +→ →− −= nnnnn JJc& , [ ]nnn nnnnn nn cc cczJ →+ ++→+ +→ Γ−−Γ−= 1 11 1 1 )1( )1( , (11) where 1nnJ →+ is the net flux of B atoms from plane n to n+1 per lattice site, z is the number of NN sites in neighboring planes ( 3z = ), 1+→Γ nn is the frequency of exchange of B atom in plane n with A atom in plane n+1: −=Γ +→ +→ kT E nn nn 1 1 expν , (12) where 1+→nnE is a corresponding activation barrier.
nn o AB BB n n on AA AB n n o n E E E E zc zc z c E E zc zc z c +→ + + −+ = +− ++ +− ++ (13b) Here oz is the number of NN sites in the same plane (6oz = ), oE is a fixed saddle point energy for A-B exchange.
Let's assume that the stress relaxation has a nonuniform character: instead of redistribution within the crystal grain it is localized making such "overthrusts" of a lattice.
Here ν is a number of interstitials per site ( 3=ν - see Fig. 5), oz is the number of NN interstitial in the same plane (4=oz ), XYji→Γ - the frequency of displacement of atom Y in the plane j by X-interstitial from the plane i, X ji→Γ' - the frequency of X-interstitial jump from plane i to plane j.
For the concentration change (of B-species) in plane n: 1 1 +→ →− −= nnnnn JJc& , [ ]nnn nnnnn nn cc cczJ →+ ++→+ +→ Γ−−Γ−= 1 11 1 1 )1( )1( , (11) where 1nnJ →+ is the net flux of B atoms from plane n to n+1 per lattice site, z is the number of NN sites in neighboring planes ( 3z = ), 1+→Γ nn is the frequency of exchange of B atom in plane n with A atom in plane n+1: −=Γ +→ +→ kT E nn nn 1 1 expν , (12) where 1+→nnE is a corresponding activation barrier.
nn o AB BB n n on AA AB n n o n E E E E zc zc z c E E zc zc z c +→ + + −+ = +− ++ +− ++ (13b) Here oz is the number of NN sites in the same plane (6oz = ), oE is a fixed saddle point energy for A-B exchange.
Let's assume that the stress relaxation has a nonuniform character: instead of redistribution within the crystal grain it is localized making such "overthrusts" of a lattice.
Here ν is a number of interstitials per site ( 3=ν - see Fig. 5), oz is the number of NN interstitial in the same plane (4=oz ), XYji→Γ - the frequency of displacement of atom Y in the plane j by X-interstitial from the plane i, X ji→Γ' - the frequency of X-interstitial jump from plane i to plane j.
Online since: May 2023
Authors: Fauzilah Ismail, Ainie Abdul Shukor, Niraku Rosmawati Ahmad, Ahmad Kamil Arshad, Faizah Kamarudin
A number of desiccation tests were conducted to observe the crack behaviour of manufactured kaolin clay at laboratory scale.
The Atterberg’s Limit test was carried out for classification of fine grained soil following the steps outlined in BS1337:1990 Part 2-Classification Tests.
The samples are identified according to their base materials, number, average room temperature (30°C) and sample thickness.
The Atterberg’s Limit test was carried out for classification of fine grained soil following the steps outlined in BS1337:1990 Part 2-Classification Tests.
The samples are identified according to their base materials, number, average room temperature (30°C) and sample thickness.
Online since: September 2013
Authors: G. Nagarjuna, T. Satyanarayana, K. Ravi Kiran
A number of studies viz., optical absorption, luminescence and FTIR spectra also have been carried out on these glasses.
These pictures clearly indicate that prepared glasses do not contain any crystal grains confirming amorphous nature to them.
Thus the sample doped with low content of CuO is exhibiting high intensity and half width that contain more number of Cu+ ions rather than rest of the glasses which helps in confirming the fact observed from optical absorption spectra.
These pictures clearly indicate that prepared glasses do not contain any crystal grains confirming amorphous nature to them.
Thus the sample doped with low content of CuO is exhibiting high intensity and half width that contain more number of Cu+ ions rather than rest of the glasses which helps in confirming the fact observed from optical absorption spectra.
Online since: June 2016
Authors: Viktor Malau, Latif Arifudin
The objective of this research is to characterize the mechanical properties and material constants of HQ (High Quality) 705 alloy steel mainly its VHN (Vickers Hardness Number) and tensile strength before and after quenching and tempering heat treatments.
The results show that VHN (Vickers Hardness Number) depends on indentation load and VHN increases with increment of load for indentation load lower than 5 N.
This material is supplied as quenched and tempered conditions with a hardness level of 270 – 330 BHN (Brinell Hardness Number) and tensile strength level of 900 – 1100 MPa.
The VHN (Vickers Hardness Number) depends on indentation load if indentation load is lower than 5 N.
Wu, Contact damage of silicon carbide ceramics with different grain structures measured by Hertzian and Vickers indentation, Journal of the European Ceramic Society 35, (2015), p. 1725–1736
The results show that VHN (Vickers Hardness Number) depends on indentation load and VHN increases with increment of load for indentation load lower than 5 N.
This material is supplied as quenched and tempered conditions with a hardness level of 270 – 330 BHN (Brinell Hardness Number) and tensile strength level of 900 – 1100 MPa.
The VHN (Vickers Hardness Number) depends on indentation load if indentation load is lower than 5 N.
Wu, Contact damage of silicon carbide ceramics with different grain structures measured by Hertzian and Vickers indentation, Journal of the European Ceramic Society 35, (2015), p. 1725–1736
Online since: September 2011
Authors: Y. Rahmani Firoozjani, S. M. Marandi, S. Sani Kermani
Based on ASTM D 6270 - 08e1 [30], it was composed of waste tires that had been mechanically chopped using multiple chopping steps and were sieved with mesh numbers of 3/8", No.4, No.10, No.40 and No.100.
By this consideration, the soil was mixed with 0%, 8%, 10% and 14% granulated rubber by weight with the same grain size distribution.
This result was predictable by comparing the stiffness of rubber and soil grains.
Also, by replacement of the soil grains with granulated rubber the mixture becomes more softer and the shear modulus decreases.
In Hardin/Drnevich model in FLAC software, reference shear strain (γr) is used as Hardin number to determine the dynamic behavior of the material.
By this consideration, the soil was mixed with 0%, 8%, 10% and 14% granulated rubber by weight with the same grain size distribution.
This result was predictable by comparing the stiffness of rubber and soil grains.
Also, by replacement of the soil grains with granulated rubber the mixture becomes more softer and the shear modulus decreases.
In Hardin/Drnevich model in FLAC software, reference shear strain (γr) is used as Hardin number to determine the dynamic behavior of the material.
Online since: August 2013
Authors: Guang Hui Li, Li Hua Zhang, Jiang Wei Zhao, Bin Li
The signals were transmitted to the signal conditioning part to complete the signal amplification and active filter, then DAQ will complete the signal pickup and the set of relevant parameters (Acquisition channel, sample rate, sample numbers period, etc), The data will be further processed and displayed on the software of the measurement and control system based on LabVIEW .
sample rate or sample numbers, and so on) (2)Synchronous acquisition of motor input speed (n) and motor input torque (T) through the data acquisition equipment, then save as LABVIEW data type
The sample rate and the sample numbers are 1000), as is shown in Fig.6.
Secondly, assuming that the given motor speed was 2000 r/min and the signal input torque was (The sample rate and the sample number are 1000),the preservation of data recovery torque signal and motor power consumption information were shown in Fig.8 and Fig.9.
Test of Near Infrared Detector for Grain Component Based on Virtual Instrument[J].
sample rate or sample numbers, and so on) (2)Synchronous acquisition of motor input speed (n) and motor input torque (T) through the data acquisition equipment, then save as LABVIEW data type
The sample rate and the sample numbers are 1000), as is shown in Fig.6.
Secondly, assuming that the given motor speed was 2000 r/min and the signal input torque was (The sample rate and the sample number are 1000),the preservation of data recovery torque signal and motor power consumption information were shown in Fig.8 and Fig.9.
Test of Near Infrared Detector for Grain Component Based on Virtual Instrument[J].
Online since: January 2020
Authors: Yu.A. Svinoroev, Valery V. Dyadichev, O.A. Ternovskiy
However, despite its total dominance in modern foundry production, as shown in various publications [12, 13, 14], it has a number of significant drawbacks.
Considering this, in general case, the increase of binding capacity can be achieved through a targeted set of activities, which may include: 1-optimization of the composition of the binder and mixing modes, which will lead to a uniform distribution of the binder on the composition of the mixture and the formation of uniform films on the grains of the filler; 2-optimization of compaction and forming modes; 3-selection of substances that contribute to the formation of cross-linking between the oligomeric chains of lignosulfonic acids during the curing process, i.e.
The number of modifier in the binding complex was 5 mass parts from the number of LST, that corresponded to the optimal ratio [17].
The compositions of the experimental mixtures and the conditions for their curing Composition number Component composition, in the number of mass parts (m.p.)
Considering this, in general case, the increase of binding capacity can be achieved through a targeted set of activities, which may include: 1-optimization of the composition of the binder and mixing modes, which will lead to a uniform distribution of the binder on the composition of the mixture and the formation of uniform films on the grains of the filler; 2-optimization of compaction and forming modes; 3-selection of substances that contribute to the formation of cross-linking between the oligomeric chains of lignosulfonic acids during the curing process, i.e.
The number of modifier in the binding complex was 5 mass parts from the number of LST, that corresponded to the optimal ratio [17].
The compositions of the experimental mixtures and the conditions for their curing Composition number Component composition, in the number of mass parts (m.p.)
Online since: July 2014
Authors: Hong Zhang, Liang Li, Zhi Yuan Wang, Rong Xing Liu
With the development of highway traffic and our country’s demand for energy, the even number of high- class highway in the desert area will be increasing.
Aeolian land also has a small number of other mineral particles, including white mica, black mica, limonite and pyrite and chlorite, hornblende heavy mineral.
Aeolian sand’s sample belong to fine sand; From the particle characteristics, aeolian sand samples meet the requirement that “Priority to choose better graded gravel soil, sand soil and coarse grain soil as a filler, filler particle size should be less than 150 mm maximum”[7],judging from uniformity coefficient and coefficient of curvature, Aeolian sand samples’ particle size distribution is uniform, good separation, but more patience must be paid to possible compaction difficulties caused by poorly graded.
Table5 Resilient modulus test results summary under different degree of compaction, moisture content degree of compaction (%) 90 Moisture content (%) 0 2.0 6.0 9.9 Dry density(g/cm3) 1.58 1.61 1.59 1.66 Number of specimen 0 8 4 0 Resilient modulus(MPa) / 27.3 28.98 / Degree of compaction(%) 94 Moisture content(%) 0 2.0 6.0 9.9 Dry density(g/cm3) 1.65 1.68 1.66 1.69 Number of specimen 3 4 6 4 Resilient modulus(MPa) 27.17 36.16 40.25 35.40 Degree of compaction(%) 96 Moisture content(%) 0 2.0 6.0 9.9 Dry density(g/cm3) 1.70 1.72 1.70 1.73 Number of specimen 3 5 6 10 Resilient modulus(MPa) 30.79 55.79 49.27 38.92 It’s easy to find that for compacted aeolian sand, when it’s dry, the resilient modulus E0 is basically between 19.09MPa and 41.48MPa; while it has a certain moisture content, E0 is between 27MPa and 76.71MPa; when the moisture content is fixed, E0 will increase with the increase dry density; when the moisture content changes a little, E0 can also reach high value.
Aeolian land also has a small number of other mineral particles, including white mica, black mica, limonite and pyrite and chlorite, hornblende heavy mineral.
Aeolian sand’s sample belong to fine sand; From the particle characteristics, aeolian sand samples meet the requirement that “Priority to choose better graded gravel soil, sand soil and coarse grain soil as a filler, filler particle size should be less than 150 mm maximum”[7],judging from uniformity coefficient and coefficient of curvature, Aeolian sand samples’ particle size distribution is uniform, good separation, but more patience must be paid to possible compaction difficulties caused by poorly graded.
Table5 Resilient modulus test results summary under different degree of compaction, moisture content degree of compaction (%) 90 Moisture content (%) 0 2.0 6.0 9.9 Dry density(g/cm3) 1.58 1.61 1.59 1.66 Number of specimen 0 8 4 0 Resilient modulus(MPa) / 27.3 28.98 / Degree of compaction(%) 94 Moisture content(%) 0 2.0 6.0 9.9 Dry density(g/cm3) 1.65 1.68 1.66 1.69 Number of specimen 3 4 6 4 Resilient modulus(MPa) 27.17 36.16 40.25 35.40 Degree of compaction(%) 96 Moisture content(%) 0 2.0 6.0 9.9 Dry density(g/cm3) 1.70 1.72 1.70 1.73 Number of specimen 3 5 6 10 Resilient modulus(MPa) 30.79 55.79 49.27 38.92 It’s easy to find that for compacted aeolian sand, when it’s dry, the resilient modulus E0 is basically between 19.09MPa and 41.48MPa; while it has a certain moisture content, E0 is between 27MPa and 76.71MPa; when the moisture content is fixed, E0 will increase with the increase dry density; when the moisture content changes a little, E0 can also reach high value.
Online since: January 2011
Authors: Jun Xin Yan, De Fu Chi, Jia Yu
A number of biopesticides (bacteria, fungi, virus, pheromones, plant extracts) have been already in use to control various types of insects responsible for the destruction of forests and agricultural crops.
Experimental Insect Martianus dermestoides Chevrolat (Coleopteran, Tenebrionidae, a kind of stored grain pests), was originally collected from Shenyang city, Liao-Ning province, China, and raised in laboratory without any contact with insecticides since 2005.
The number of colony forming units (CFU)/mL was determined after 24 h of incubation at 30 ± 2°C.
Daily observations were carried out to record the number of adults which showed any reversible knockdown effect and the number of the dead individuals was determined as well.
In alginate microcapsules, 10 times the number of uncoated Bt spores were viable at 16 h.
Experimental Insect Martianus dermestoides Chevrolat (Coleopteran, Tenebrionidae, a kind of stored grain pests), was originally collected from Shenyang city, Liao-Ning province, China, and raised in laboratory without any contact with insecticides since 2005.
The number of colony forming units (CFU)/mL was determined after 24 h of incubation at 30 ± 2°C.
Daily observations were carried out to record the number of adults which showed any reversible knockdown effect and the number of the dead individuals was determined as well.
In alginate microcapsules, 10 times the number of uncoated Bt spores were viable at 16 h.