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Online since: December 2010
Authors: Benito Lauret, Luis Alonso, Fernando Alonso
Ramiro de Maeztu, s/n, 28040 Madrid, Spain
2 Languages and Systems and Software Engineering Department, School of Computing, UPM, Campus de Montegancedo, s/n, 28660 Boadilla del Monte, Madrid, Spain
aluis@pyfarquitectura.com, bbenito.lauret@upm.es, cfalonso@fi.upm.es
Keywords: Monolithic silica gel insulation; aerogel; energy reduction; space saving; thermal insulation; transparent vacuum insulation panels; lightweight envelope; free-form panels; transparent panels; high energy efficiency.
We have compared this information with data supplied by other independent scientific tests run by Moner-Girona, Roig, and Molins (CSIC) [4] and by independent laboratories like Zae Bayern (Germany) [5] or the University of Denmark [6].
Data loggers are placed inside each box for monitoring purposes to measure and compare their inside temperature.
These trials were evaluated and compared with the computer-simulated aerogel data and data from the theoretical study (see comparison in Fig. 3), and we arrived at the following conclusion: Fig. 3 Comparison of empirical data The properties of the proposed component are better than double-glazed VIPs and reinforced polyester panels (Okalux and Kallwall) separately, as it combines the properties of the two to generate a new system and solve the problems specified earlier.
- Maximum temperature: should withstand temperatures of from 120°C to 250ºC thanks to the outer glass fiber sandwich - Weighted sound reduction value: estimated at 26-45 dB Testing.
We have compared this information with data supplied by other independent scientific tests run by Moner-Girona, Roig, and Molins (CSIC) [4] and by independent laboratories like Zae Bayern (Germany) [5] or the University of Denmark [6].
Data loggers are placed inside each box for monitoring purposes to measure and compare their inside temperature.
These trials were evaluated and compared with the computer-simulated aerogel data and data from the theoretical study (see comparison in Fig. 3), and we arrived at the following conclusion: Fig. 3 Comparison of empirical data The properties of the proposed component are better than double-glazed VIPs and reinforced polyester panels (Okalux and Kallwall) separately, as it combines the properties of the two to generate a new system and solve the problems specified earlier.
- Maximum temperature: should withstand temperatures of from 120°C to 250ºC thanks to the outer glass fiber sandwich - Weighted sound reduction value: estimated at 26-45 dB Testing.
Online since: December 2018
Authors: Frank Walther, Martin Klein
Further process-oriented constant amplitude tests were performed at selected stress amplitudes in LCF and HCF regimes, in which Ecorr and total strain εt responses were simultaneously recorded with a high data acquisition rate using a self-programmed software based on LabView from National Instruments.
Similar results were obtained for DieMag422 regarding the lifetime reduction in LCF regime.
The reduction of the fatigue lifetime in LCF regime can be attributed to an accelerated crack formation due to selective corrosive attack in areas with strain localizations, as a result of localized slipping [6].
Evaluation of Ecorr,a for f = 10 Hz shows a linear increase after an initial reduction, which corresponds to the initial cyclic hardening given by εa,p.
Equivalent to the LCF tests with AE42, initial reduction of Ecorr,m at f = 10 Hz (Fig. 6a) and absent reduction at f = 0.1 Hz (Fig. 6c) can be observed.
Similar results were obtained for DieMag422 regarding the lifetime reduction in LCF regime.
The reduction of the fatigue lifetime in LCF regime can be attributed to an accelerated crack formation due to selective corrosive attack in areas with strain localizations, as a result of localized slipping [6].
Evaluation of Ecorr,a for f = 10 Hz shows a linear increase after an initial reduction, which corresponds to the initial cyclic hardening given by εa,p.
Equivalent to the LCF tests with AE42, initial reduction of Ecorr,m at f = 10 Hz (Fig. 6a) and absent reduction at f = 0.1 Hz (Fig. 6c) can be observed.
Online since: August 2013
Authors: Ying Min Yan, Hao Hu
When the transmission was in the highest position, the automobile's power performance and fuel economy was depends on the main reduction ratio.
As the development of engine power, reduce the vehicle quality and road conditions improve, main reduction ratio has little development trend.
The Basic Data of Drive Axle Design Design of the drive axle of the light bus: maximum engine torque was 162N.m; transmission gear transmission ratio of drive axle load was 4.452; total load was 22900N; the wheel radius was 800mm; track was 1900mm. 1- the main speed reducer 2- sleeve 3- differential 4, 7-half shaft 5- adjusting nut 6- adjusting shim 8- axle housing Figure 1.
Gear type main driver can be divided into single reducer, reducer, double speed reducer, single-stage, two-stage, penetrating through single or double reduction of wheel reducer.
The main reduction must ensure the main, driven gear meshing condition was good, to make them work well.
As the development of engine power, reduce the vehicle quality and road conditions improve, main reduction ratio has little development trend.
The Basic Data of Drive Axle Design Design of the drive axle of the light bus: maximum engine torque was 162N.m; transmission gear transmission ratio of drive axle load was 4.452; total load was 22900N; the wheel radius was 800mm; track was 1900mm. 1- the main speed reducer 2- sleeve 3- differential 4, 7-half shaft 5- adjusting nut 6- adjusting shim 8- axle housing Figure 1.
Gear type main driver can be divided into single reducer, reducer, double speed reducer, single-stage, two-stage, penetrating through single or double reduction of wheel reducer.
The main reduction must ensure the main, driven gear meshing condition was good, to make them work well.
Online since: January 2013
Authors: Feng Jiang, Lei Niu, Wei Xu, Guo Min Xiao
The surface area of the sample was measured by means of a Beishide 3H-2000 instrument, and was determined by applying the BET (Brunauer-Emmett-Teller) model to nitrogen adsorption data obtained in the relative pressure range from 0.04 to 0.32.
The components of the gas after reduction were monitored by a thermal conductor detector (TCD).
Reduction-Oxidation and Acidic Properties of Catalyst.
The TPR experiment was carried out to observe the reduction-oxidation properties of the catalyst.
As shown in Fig. 3, there was a single major reduction peak at about 643 °C in the TPR profile.
The components of the gas after reduction were monitored by a thermal conductor detector (TCD).
Reduction-Oxidation and Acidic Properties of Catalyst.
The TPR experiment was carried out to observe the reduction-oxidation properties of the catalyst.
As shown in Fig. 3, there was a single major reduction peak at about 643 °C in the TPR profile.
Online since: May 2022
Authors: Harekrishna Bar
Ag-Au BMNPs formed by the co-reduction of Au(III) and Ag(I) ions in aqueous leaves extract solution where the extract act as both reducing and capping agent.
Bimetallic colloids could be prepared either by simultaneous co-reduction of two kinds of metals to give alloy or successive reduction and deposition one metal over the nuclei of another to have core-shell morphology.
Co-reduction of silver and gold ions forms the Ag-Au BMNPs predominantly, along with few togetherness of both NPs observed in HRTEM images which is due to successive reduction of metal ions.
There is also a strong signal for Cu in the EDX data, which come from Cu TEM grid.
Zhao, Pt skin coated hollow Ag-Pt bimetallic nanoparticles with high catalytic activity for oxygen reduction reaction, J. of Power Sources 36515 (2017) 17-25
Bimetallic colloids could be prepared either by simultaneous co-reduction of two kinds of metals to give alloy or successive reduction and deposition one metal over the nuclei of another to have core-shell morphology.
Co-reduction of silver and gold ions forms the Ag-Au BMNPs predominantly, along with few togetherness of both NPs observed in HRTEM images which is due to successive reduction of metal ions.
There is also a strong signal for Cu in the EDX data, which come from Cu TEM grid.
Zhao, Pt skin coated hollow Ag-Pt bimetallic nanoparticles with high catalytic activity for oxygen reduction reaction, J. of Power Sources 36515 (2017) 17-25
Online since: April 2008
Authors: Liang Zuo, Q.W. Jiang, G. Wang, X. Zhao, Y. Ren, Yan Dong Liu, He Tong, Yan Dong Wang
In-situ annealing process of cold-rolled IF
steel with 80% reduction was observed using high-energy X-ray diffraction.
In our study, the cold-rolling IF steel with 80% reduction was annealed in situ in the furnace mounted on the sample stage between monochromator and two-dimensional detector.
IF steel sheet was cold rolled to 80% reduction and the thickness is 0.7mm.
The intensity was obtained from raw data by integrating the detector channels along the radial direction.
In our study, the cold-rolling IF steel with 80% reduction was annealed in situ in the furnace mounted on the sample stage between monochromator and two-dimensional detector.
IF steel sheet was cold rolled to 80% reduction and the thickness is 0.7mm.
The intensity was obtained from raw data by integrating the detector channels along the radial direction.
Online since: November 2012
Authors: Pin Qi Xia, Wei Wang
All paths are formulaic for the dimension of the core has been parameterized and the reduction of magnetic motive force between A and B can be presented as
(3)
(4)
Where, function H1 is the nonlinear relationship between magnetic field intensity and magnetic flux density about the out wall, H2 and H3 is the nonlinear relationship between magnetic field intensity and magnetic flux density about MR fluid and armature respectively.
Based on the principle which total magnetic flux is unchangeable, the reduction of magnetic motive force presented as formula (3) and (4) should be equivalent.
Based on the principle of magnetic circle, the total reduction of magnetic motive force can be presented as the sum between the reductions of magnetic motive force in and out of the core, that is (6) Where, function H4 is the nonlinear relationship between magnetic field intensity and magnetic flux density about the core.
The damper and the experiment data under one of the experimental conditions have been shown in Fig. 4.
Prototype and the experiment data Summary A problem about MR damper design has been discussed in the article.
Based on the principle which total magnetic flux is unchangeable, the reduction of magnetic motive force presented as formula (3) and (4) should be equivalent.
Based on the principle of magnetic circle, the total reduction of magnetic motive force can be presented as the sum between the reductions of magnetic motive force in and out of the core, that is (6) Where, function H4 is the nonlinear relationship between magnetic field intensity and magnetic flux density about the core.
The damper and the experiment data under one of the experimental conditions have been shown in Fig. 4.
Prototype and the experiment data Summary A problem about MR damper design has been discussed in the article.
Online since: August 2018
Authors: Sergio Baragetti, Emanuele Vincenzo Arcieri, Emanuele Borzini
The data points for uncoated specimens fit on the line while for the coated specimens we have a bigger dispersion of the results as shown by Eq. 2 for uncoated and Eq.3 for coated specimens:
S = -28.39 logN + 418.45 (R2 = 0.9533) (2)
S = -8.59 logN + 279.79 (R2 = 0.6162)
This reduction decreases for higher number of cycles and shows an intersection with the uncoated specimens at 1E+7 cycles.
The reduction for 2E+5 cycles is due to the applied thermal load which modifies the mechanical features [8] and the premature cracking of the coating do to the high deformations [10].
The useful contribution of the residual stresses can be also seen in the small slope of the DLC data for 7075-T6 already explained for steel substrates in [10].
This behavior is in contrast with [8] and [9] where a substantial delamination for applied stresses higher than 200 MPa occurred with a consequent reduction of the fatigue resistance.
This reduction decreases for higher number of cycles and shows an intersection with the uncoated specimens at 1E+7 cycles.
The reduction for 2E+5 cycles is due to the applied thermal load which modifies the mechanical features [8] and the premature cracking of the coating do to the high deformations [10].
The useful contribution of the residual stresses can be also seen in the small slope of the DLC data for 7075-T6 already explained for steel substrates in [10].
This behavior is in contrast with [8] and [9] where a substantial delamination for applied stresses higher than 200 MPa occurred with a consequent reduction of the fatigue resistance.
Online since: March 2004
Authors: Zhan Qiang Liu, Xing Ai
Major advantages of high-speed machining are high material removal rates, the reduction in lead
times, low cutting forces, dissipation of heat with chip removal resulting in decrease in workpiece
distortion and increase part precision and surface finish.
Table 1 Chemical composition and hardness of the workpiece material Chemical composition [mass%] Hardness [HB] Workpiece material C Si Mn S P Cr Fe HT 200 3.12 1.8 0.72 0.11 0.1 0.058 Balance 206 Table 2 Tool geometry and cutting conditions Cutting conditions Parameters Axial rake angle -5° Radial rake angle -7° Feed per tooth [mm/z] 0.1 Cutting width [mm] 5 Depth of cut [mm] 0.5 Number of tooth single Approach angle 75° milling cutter tool wear measurement work table data processing spindle workpiece dynamometer amplifier cutting force measurement Fz Fy Fx Fz Fy Fx D/A board Fig.1 Experimental set-up Results and Discussions Tool Wear.
Knowledge and data on the cutting forces are required not only for the design of machine tools and cutting tools, but also for the determination of cutting conditions for machining operations, especially for the programming of high speed machining.
With cutting speed greater than 900 m/min, a reduction of all the three cutting force components are observed.
As cutting speed increases greater than the critical values, a reduction of cutting force has been observed.
Table 1 Chemical composition and hardness of the workpiece material Chemical composition [mass%] Hardness [HB] Workpiece material C Si Mn S P Cr Fe HT 200 3.12 1.8 0.72 0.11 0.1 0.058 Balance 206 Table 2 Tool geometry and cutting conditions Cutting conditions Parameters Axial rake angle -5° Radial rake angle -7° Feed per tooth [mm/z] 0.1 Cutting width [mm] 5 Depth of cut [mm] 0.5 Number of tooth single Approach angle 75° milling cutter tool wear measurement work table data processing spindle workpiece dynamometer amplifier cutting force measurement Fz Fy Fx Fz Fy Fx D/A board Fig.1 Experimental set-up Results and Discussions Tool Wear.
Knowledge and data on the cutting forces are required not only for the design of machine tools and cutting tools, but also for the determination of cutting conditions for machining operations, especially for the programming of high speed machining.
With cutting speed greater than 900 m/min, a reduction of all the three cutting force components are observed.
As cutting speed increases greater than the critical values, a reduction of cutting force has been observed.
Online since: August 2013
Authors: Jin Dong Ren, Ting Ting Lin, Xiao Yi Zhang, Chun Lei Sang, Pei Zhi Zhang, Wei Zhang, Qi Shan
But in fact many design problems depend on multi-dimensional population data, which are multi-dimensional random variables and follow certain distribution laws.
In order to meet target design confidence level, required human data should be based on their distribution characteristics [8].
Motor driving force, reduction ratio, and spring parameters would be determined after all structural dimensions had been fixed.
Therefore, worm reduction motor would be preferred with advantages of compact structure, smooth running and low noise.
Types of reduction motors could be determined based on above calculations
In order to meet target design confidence level, required human data should be based on their distribution characteristics [8].
Motor driving force, reduction ratio, and spring parameters would be determined after all structural dimensions had been fixed.
Therefore, worm reduction motor would be preferred with advantages of compact structure, smooth running and low noise.
Types of reduction motors could be determined based on above calculations