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Online since: June 2019
Authors: Andreas Nöth, Jonathan Maier, Katrin Schönfeld
The coated fiber bundles showed a reduction of the maximum tensile load to 90.0 % for the BN/Si3N4 and to 86.7 % for the BN/SiC coating in comparison to the fiber bundle in the as-received state.
A thermal treatment of the coated fiber bundles up to 1650 °C led to no reduction of their maximum tensile load.
The maximum tensile loads of the coated fiber bundles showed no significant reduction after the temperature treatments (Fig. 3).
The data point of HNS2 at 1650 °C was confirmed by several repetitions of the test.
The coated fiber showed a maximum reduction in the tensile load of 13.3 % in comparison to the SiC fiber bundle in the as-received state.
Online since: August 2011
Authors: Hui Chen, Jian Ping Tan, Jin Li Gong, Zhao Qiang Shu, Xian Yue Cao, Ji Neng Zhou
The system is applied in 300MN large forging hydraulic press, and large amounts of monitoring data are collected.
Data analysis is carried out.
As to the spatial attitude of moving beam in large hydraulic press, there is little measuring method and data analysis reported currently.
The stress reduction is 12.4Mpa and the reduce rate is 30.9%.
(2) Apply the new system in 300MN hydraulic press, large amounts of monitoring data were collected for the first time.
Online since: September 2013
Authors: Takehiro Kato, Hajime Tsuji, Kaoru Wakatsuki, Yoshio Ogawa
The data indicates that the fire fighter’s multi-layer fabric controls the heat and moisture transfer within fire fighter clothing and no positive contribution by any types of underwear.
The study for reduction of heat stress is done by many researchers [1-4].
l The slop of the linear regression shall be 0.0195 K·m2/W ± 10% l No individual data measurement shall be outside ± 10% of the value predicted by the linear regression.
l The slop of the linear regression shall be 0.0043 kPa·m2/W ± 10% l No individual data measurement shall be outside ± 10% of the value predicted by the linear regression.
The data indicates that the fire fighter’s multi-layer fabric controls the heat and moisture transfer within fire fighter protective clothing and no positive contribution by any types of underwear.
Online since: July 2011
Authors: Shu Hui Zhang, Zhi Qiang Kang, Qing Lü, Jie Li, Xiao Jie Liu
Electroconductive Si3N4–TiN ceramic was fabricated by pressureless sintering from the chief materials containing high titanium slag and Si3N4 powder synthesized by carbonthermal reduction nitridation method using iron ore tailing as raw materials.
In the previous work, Si3N4 powders were prepared from iron ore tailings containing high SiO2 content by carbothermal reduction and nitridation method [6].
Table 1 Performance data of various ceramics from different references Ceramics Volume density /g·cm-3 Vickers hardness /GPa Flexure strength /Mpa Room electrical resistivity /·cm Materials and fabrication methods Si3N4–TiN in this paper 2.79 8.23 66 7.1×10-2 Iron ore tailing, high titanium slag,Y2O3,Al2O3, pressureless sintering TiN/ O′- Sialon[11] 3.1 9.2 169 1.8×10-2 High titanium slag, pressureless sintering Si3N4[12] 3.21 1.1×1014 Pure Si3N4 powder TiN[12] 5.44 21G 0.25×10-4 Pure TiN powder Ti2AlN- TiN[13] 8.57 Ti ,Al and TiN powder, HPS Al2TiO5- Si3N4[14] 2.77 45.34 Si3N4, Al2O3, TiO2 and SiO2 powders, reaction sintering method Si3N4 matrix ceramic[15] 94.3 Si, BN and SiO2 powders, reaction sintering method Table 1 shows the structure property, mechanical property, and room electricapability data of various ceramic materials fabricated by different raw material or different process from several references.
The above data illustrate that Si3N4-TiN obtained in this paper has good performaces.
Online since: July 2014
Authors: S. Senthilvelan, R. Kalidasan, M. Yatin, D.K. Sarma
This behaviour is due to the machining of front cutting tool preheat as well as reduction of effective cutting speed while machining with rear cutting tool.
The signals from each dynamometer is combined with the help of junction box, through which the signal is acquired by Data Acquisition Card, connected to a computer, which enables online monitoring and storing of the cutting force data.
Infrared camera (INFRATEC, Modline 5 series) capable of measuring temperatures in range of - 40oC to 2000oC was used to simultaneously record the temperatures with a data acquisition rate of 8 frames per second.
Additionally, a diameter reduction takes place due to the cutting action of the front cutting tool and this leads to reduced cutting speed of rear cutting tool.
Online since: March 2024
Authors: Yuli Setiyorini, Kevin Armeimada Prabowo, Sungging Pintowantoro, Vuri Ayu Setyowati, Fakhreza Abdul
From air pollution recapitulation data, gas emissions from motor vehicles increase every year.
In the selective reduction of nickel laterite ore, Fe, and Ni, the selective reduction is the opposite.
Luís, “LI-NMC batteries model evaluation with experimental data for electric vehicle application,” Batteries, vol. 4, no. 1, pp. 1–16, 2018, doi: 10.3390/batteries4010011
Ding, “Thermodynamic of selective reduction of laterite ore by reducing gases,” Trans.
Smelting and selective reduction of limonitic laterite ore in mini blast furnace.
Online since: April 2015
Authors: Filbert O. Ombongi, Philip L. Kibet, Stephen Musyoki
The model was transmitting data at a rate of 64kbps over an AWGN channel.
The encoded data was then modulated using QPSK or 16-QAM modulator.
The performance graphs were plotted for each data rate with or without coding and the error rates at 384kbps data rate with convolution coding compared with a study carried in [23].
Fig 2: Simulation of BERs at 384kbps for coded and uncoded data using QPSK modulation Fig 3: Simulation of BERs at 384kbps for coded and uncoded data using 16-QAM modulation Fig 4: Simulation of BERs at 2Mbps for coded and uncoded data using QPSK modulation Fig 5: Simulation of BERs at 2Mbps for coded data using 16-QAM modulation Fig 6: Comparison between QPSK and 16-QAM modulation at 2Mbps for uncoded data Fig 7: Comparison between QPSK and 16-QAM modulation at 2Mbps for coded data Fig 8: Comparison between QPSK and 16-QAM modulation at 384kbps for uncoded data Fig 9: Comparison between QPSK and 16-QAM modulation at 384kbps for coded data Figure 2 and 3 shows the BER simulation when QPSK and 16-QAM were used for uncoded and coded data at a rate of 384kbps over an AWGN channel.
Figure 4 and 5 shows the simulation of BER at a data rate of 2Mbps under the same channel conditions.
Online since: January 2005
Authors: G. Amaratunga, K.H. Ang, I. Alexandrou, N.D. Mathur, R. Lacerda, I.Y.Y. Bu, S. Haq
The data suggests that the process reported has the ability to mass-produce carbon encapsulated ferromagnetic nanoparticles with desired particle size distribution, and hence with controlled size-dependent magnetic properties.
With these potential benefits, carbon encapsulated ferromagnetic nanoparticles have received considerable attention in recent years as small magnetic clusters in high density magnetic data storage, xerography, and magnetic resonance imaging [2].
The XRD data was measured using the Phillips X-Pert high-resolution horizontal diffractometer using the Cu Kα radiation (1.5405 oA ) directly from powder samples.
Initially, it was thought that the reduction in Ni content played an important role in the reduction of magnetisation values.
Online since: June 2010
Authors: Zheng Wen Zhang, Li Sha Ma, Huan Li Wang, Wei Wang
Experimental data show that MSW's shear failure still satisfies the Mohr-Coulomb criterion.
Test Data Shear stress τ and displacement w curves (τ-w curve) was recorded of MSW specimens of different densities.
Age during the 4-7d, it can be observed that the samples with lower density have a more significant expansion, accompanied by the gas (smell) ejects, liquid discharges and heat releases, which could result in the initial structure weakening and the porosity increasing, eventually leading to the apparent phenomenon of reduction in shear strength.
As for the specimen with larger density, whether there will still be a phenomenon of partial reduction in intensity after the age of more than 7d, and with the age of the sample increasing, whether the magnitude of shear strength will recovery and its process description, more complex tests need to be done.
From the experiment data available, for age and density fixed, normal stress and shear strength of MSW samples are approximate to linear relationship.
Online since: September 2015
Authors: Karel Obrtlík, Ladislav Čelko, Ivo Šulák
Hardening/softening curves, cyclic stress-strain curve and fatigue life data of both materials were obtained.
It has not been observed any improvement or reduction of low cycle fatigue life in representation of total strain amplitude versus number of cycles to failure of grit blasted material in comparison with as-received material.
Experimental data were fitted by the power law: log σa = log K´ + n´ log εap (1) and the fatigue hardening coefficient K´ and the fatigue hardening exponent n´ were evaluated using linear regression analysis.
Existing experimental data show that the grit blasting enhances the fatigue resistance of engineering materials by introduction of compressive residual stresses to the surface layer and by work hardening of the layer [1, 3, 4].
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