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Online since: September 2004
Authors: J.F. Orr, N.J. Dunne
The
most notable condition which has characterised the development of mixing systems has been
reduction of pressure below ambient (0 to -86kPa) with the aim of reducing porosity, however it has
been reported that the resulting increase in apparent density of the PMMA causes increased
volumetric shrinkage up to 7.3% [5].
Modulus values were determined to be in the range 2.11-2.65GPa, depending on pressure reduction during mixing, which concur with previous published results [9].
The system records displacements of recognised surface features, in this case enhanced by sputtered points of black paint, and the data is subsequently differentiated to yield strains [13].
Initial results are encouraging, with indications of forces imposed by curing rings of cement being of the order predicted from earlier strain measurements, however strains are known to vary with radial distance from the interface, so the best data which may be inferred from these measurements are the contact stresses normal to the contacting surfaces.
Modulus values were determined to be in the range 2.11-2.65GPa, depending on pressure reduction during mixing, which concur with previous published results [9].
The system records displacements of recognised surface features, in this case enhanced by sputtered points of black paint, and the data is subsequently differentiated to yield strains [13].
Initial results are encouraging, with indications of forces imposed by curing rings of cement being of the order predicted from earlier strain measurements, however strains are known to vary with radial distance from the interface, so the best data which may be inferred from these measurements are the contact stresses normal to the contacting surfaces.
Online since: March 2010
Authors: Fadi K. Abu-Farha, Mohammed A. Nazzal
For example, the utilization of magnesium (Mg) alloys in
automotive components will yield a significant weight reduction which has a positive effect on fuel
consumption and carbon dioxide emission levels.
The advantages include reduction in tooling cost, improved ductility, ability to form intricate sections, and less secondary operations.
The strength coefficient (k) and strain rate sensitivity (m) were determined by fitting the model to the experimental data of Abu Farha et al. [8] obtained for Mg AZ31 sheets and shown in Fig. 1b.
The reason for doing so is the lack of experimental data on Mg AZ31 tubes.
The advantages include reduction in tooling cost, improved ductility, ability to form intricate sections, and less secondary operations.
The strength coefficient (k) and strain rate sensitivity (m) were determined by fitting the model to the experimental data of Abu Farha et al. [8] obtained for Mg AZ31 sheets and shown in Fig. 1b.
The reason for doing so is the lack of experimental data on Mg AZ31 tubes.
Online since: March 2011
Authors: Yu Tian Wang, Wei Wei Pan, Dong Sheng Wang
While doing this increases the difficulty and complexity of noise reduction.
Supposing data model including noise is (7) In the formula is the primitive image which does not contain the noise estimation, is the gaussian white noise, is for image noise’s variance.
If the signal 's separate sampled data is , then the signal 's wavelet transformation decomposes into k=0,1,2,...
Aberration and its reduction of phase reconstructed based on Fresnel approximation in digital holography[J].
Supposing data model including noise is (7) In the formula is the primitive image which does not contain the noise estimation, is the gaussian white noise, is for image noise’s variance.
If the signal 's separate sampled data is , then the signal 's wavelet transformation decomposes into k=0,1,2,...
Aberration and its reduction of phase reconstructed based on Fresnel approximation in digital holography[J].
Online since: May 2013
Authors: Zulkhair Mansurov, Nina Mofa, Bakhtiyar Sadykov
The next stage is the main reaction of reduction of silicon dioxide by aluminium.
The concurrent participation of hydrogen, carbon and then aluminium in the reduction process results in the increase in the rate of ignition and combustion after 40 minutes of treatment but the maximum temperature of combustion slightly decreases.Thus, the results of analysis of combustion thermograms indicate a positive effect of bound water and carbon present in the used modifiers on the combustion process.
According to reference data [5], the values of relative dielectric permittivity for quartz is 3.5 - 4.5; glass – 3.7-10; porcelain – 4.5-4.7; corundum (Al2O3) – 8.2 and amourphous Al2O – 3.63; graphite – 10-15 and diamond – 5.6-5.8; for silicon – 12.0; alcohols – 27-41.2 and water – up to 80; for air – 1.00057.
It follows from the presented data that the value of dielectric permittivity depends on the aggregate state of the material, the degree of crystallinity and composition (or purity) of solid dielectrics.
The concurrent participation of hydrogen, carbon and then aluminium in the reduction process results in the increase in the rate of ignition and combustion after 40 minutes of treatment but the maximum temperature of combustion slightly decreases.Thus, the results of analysis of combustion thermograms indicate a positive effect of bound water and carbon present in the used modifiers on the combustion process.
According to reference data [5], the values of relative dielectric permittivity for quartz is 3.5 - 4.5; glass – 3.7-10; porcelain – 4.5-4.7; corundum (Al2O3) – 8.2 and amourphous Al2O – 3.63; graphite – 10-15 and diamond – 5.6-5.8; for silicon – 12.0; alcohols – 27-41.2 and water – up to 80; for air – 1.00057.
It follows from the presented data that the value of dielectric permittivity depends on the aggregate state of the material, the degree of crystallinity and composition (or purity) of solid dielectrics.
Online since: March 2015
Authors: Jian Yang, Xin Peng, Jin Sheng Wang
The engineering data of the bridges which have been built indicate that total construction investment of a NC(C50) pre-stressed beam bridge (the length is 40m) is 3.84 million RMB (4 thousand per square meter), and the investment of upper structure accounts for about 60% of the total construction investment.
Besides, the previous engineering data indicate that the maintenance and repair costs of the later service period of bridges account for 10% of the total construction investment, it is about 380 thousand RMB.
Through the above analysis, considering the cost of bridge during the entire service period, the total investment of RPC beam bridge (the length is 40m)is only higher than NC beam bridge by 3.3% , while the reducing costs of repair and installation caused by the weight reduction of RPC beam bridge are not considered. therefore, the economic feasibility of RPC beam bridge is great.
Next, the weight reduction of bridge can improve its crossing ability
Besides, the previous engineering data indicate that the maintenance and repair costs of the later service period of bridges account for 10% of the total construction investment, it is about 380 thousand RMB.
Through the above analysis, considering the cost of bridge during the entire service period, the total investment of RPC beam bridge (the length is 40m)is only higher than NC beam bridge by 3.3% , while the reducing costs of repair and installation caused by the weight reduction of RPC beam bridge are not considered. therefore, the economic feasibility of RPC beam bridge is great.
Next, the weight reduction of bridge can improve its crossing ability
Online since: July 2023
Authors: Suasmoro Suasmoro, Malik Anjleh Baqiya, Faried Latief
By then, calcination temperature for further process is estimated from the weight loss curve (%) where three stages of mass reduction exist.
The C region (ΔT= 440 ⁰C – 480 ⁰C) with Δm ≈8.19% is the end of a significant mass reduction that should be related to the release of other carbonate compounds.
Refinement for FTV33 2 hours data using Rietica software with rhombohedral (COD No.210-2915) and pseudo-cubic (COD No. 150-7758) phases.
Z*=Z'+jZ'' (1) Z'=Rg1+(ωRgCg)2+Rgb1+(ωRgbCgb)2 (1.1) -Z''=ωRg2Cg1+(ωRgCg)2+ωRgb2Cgb1+(ωRgbCgb)2 (1.2) Focusing on the response of the grain, then the data is represented by a circuit model consisting of a parallel combination of grain resistance (Rg) and grain capacitance (Cg).
The C region (ΔT= 440 ⁰C – 480 ⁰C) with Δm ≈8.19% is the end of a significant mass reduction that should be related to the release of other carbonate compounds.
Refinement for FTV33 2 hours data using Rietica software with rhombohedral (COD No.210-2915) and pseudo-cubic (COD No. 150-7758) phases.
Z*=Z'+jZ'' (1) Z'=Rg1+(ωRgCg)2+Rgb1+(ωRgbCgb)2 (1.1) -Z''=ωRg2Cg1+(ωRgCg)2+ωRgb2Cgb1+(ωRgbCgb)2 (1.2) Focusing on the response of the grain, then the data is represented by a circuit model consisting of a parallel combination of grain resistance (Rg) and grain capacitance (Cg).
Online since: March 2007
Authors: Olaf Andersen, Günther Stephani, Thomas Studnitzky, Wolfgang Hungerbach
Table 1: Overview of subprojects
Project Development Goals Target Applications
MAKOMP Light and stiff hollow sphere composites;
bonding technology
Fast-moving machine parts in laser
cutting and wrapping machines
MASCHA Self-supporting, sound-damping hollow
sphere structures; sintering technology
Sound-damping for tooling machines
and dust exhausts
CASMEDUM Fiber structures with large specific surface
area; functional coatings for fiber
structures
Biosensors, oxygen generators, catalytic
reduction of toxic substances in
liquids
HOTFAS Large high-temperature resistant fiber
structures; machining and finishing
processes
Explosion protection devices, heat
regenerators for stirling engines, porous
surface burners
Technological Base
The technological base for the cellular metals in focus is provided by two developments stemming
from Fraunhofer IFAM work of recent years: metallic short fiber structures and metallic hollow
spheres (Fig. 1).
A better sound damping performance of up to -4 dB was obtained, as well as an improved long-term durability and a weight reduction.
A large amount of relevant data is generated, including simulation and design tools for properties like pressure drop, heat transfer, and sound absorption.
Jörn Hübelt of Gesellschaft für Akustikforschung Dresden mbH for the provision of data, diagrams, and additional information on their respective areas of work.
A better sound damping performance of up to -4 dB was obtained, as well as an improved long-term durability and a weight reduction.
A large amount of relevant data is generated, including simulation and design tools for properties like pressure drop, heat transfer, and sound absorption.
Jörn Hübelt of Gesellschaft für Akustikforschung Dresden mbH for the provision of data, diagrams, and additional information on their respective areas of work.
Online since: May 2012
Authors: Yang Liu, Xing Rui Wang, Gang Yang, Ai Feng Zhang
Table1 Design data of the bridge
Design load
Highway-I level
Calculated rise of arc
25m
Deck length
131.704m
Computing span-to-rise ratio
1/5
Deck width
24m
Lane design
Bidirectional 6-lane flow
Computing span lengths
125m
Design criterion
Axial stress 200MPa
Vertical diaplacementl/800m
Fig. 1 Through-type steel truss arch bridge
Parametric Model of Steel Truss Arch Bridge
Design data of the bridge employed in this study is shown in Table 1.
Besides, the lateral reduction coefficient of multi-lane traffic loads should be considered [5].
In the analysis of bridge, dead load (dead weight of the whole bridge) and lateral reduction coefficient of multi-lane traffic loads are simultaneously considered, and the concentrated load Pk is applied at positions m, m, m and m (referred to as loading condition 1 to 4 ).
Besides, the lateral reduction coefficient of multi-lane traffic loads should be considered [5].
In the analysis of bridge, dead load (dead weight of the whole bridge) and lateral reduction coefficient of multi-lane traffic loads are simultaneously considered, and the concentrated load Pk is applied at positions m, m, m and m (referred to as loading condition 1 to 4 ).
Online since: May 2010
Authors: J.L. Cui, Y.M. Yan, X.J. Zhang, Peng Zhan Ying, Hong Fu
The atomic mass difference between the guest and host plays the key role on the reduction in κL
[1-3], and the scattering parameter (A) can be written as the following expression [1]:
2
2
0 ))(1(
4 M
M
xx
v
A
Δ
π
Ω
−
=
If we are able to control the size and periodicity of these vacancy planes, a signification reduction in κL can be achieved, due to the effective phonon scattering in these vacancy planes.
Li, Concise Handbook of Chemical Data (Chemical Engineering, Beijing, 2003), p. 9 (in Chinese)
[15] M.L.Li, in: Chemical Engineering Press, Concise handbook of Chemical Data (in Chinese), Beijing, 2003, p.6.
If we are able to control the size and periodicity of these vacancy planes, a signification reduction in κL can be achieved, due to the effective phonon scattering in these vacancy planes.
Li, Concise Handbook of Chemical Data (Chemical Engineering, Beijing, 2003), p. 9 (in Chinese)
[15] M.L.Li, in: Chemical Engineering Press, Concise handbook of Chemical Data (in Chinese), Beijing, 2003, p.6.
Online since: August 2014
Authors: Jing Ping Ge, Wen Xiang Ping, Peng Fei Liu, Dan Zhao, Chao Pan, Ren Peng Du
The reduction of enzyme activity in KGM medium was initiated earlier than that in PEC medium regardless of the medium type, but the reduction rate of enzyme activity was similar to the other.
However, xylanase activity maintained at ~10-4 U/mL (data not shown) which could be ignored in the process of fermentation.
The highest cellulase activity maintained at ~10-6 U/mL (data not shown).
However, xylanase activity maintained at ~10-4 U/mL (data not shown) which could be ignored in the process of fermentation.
The highest cellulase activity maintained at ~10-6 U/mL (data not shown).