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Online since: April 2011
Authors: Ashkan Tavakoli Naeini, Manouchehr Vossoughi, Mohsen Adeli
Finally, the loading capacity of A1, A2, A3 and A4 and the size of synthesized AuNPs and AgNPs were investigated using UV/Vis data and the corresponding calibration curve.
A multitude of chemical reduction methods have been used to synthesize silver nanoparticles from silver salts.
However, even in the syntheses using those polymers, either the reduction reaction was carried out in organic solvents or polydisperse nanoparticles were produced.
After 20 minutes the color of HAuCl4 solution changed from clear pale yellow to red concerning the reduction of the gold nanoparticles and trapping by PCA-PEG-PCA copolymers.
But according to the UV/visible data, the size of encapsulated silver nanoparticles is a week function of these two parameters.
Online since: January 2017
Authors: Ya Quan Xin, Ling Li, Li Yuan Fan
As the result showed, there is a minimum deviation comparing the dual Arrhenius viscosity model data and experimental data in the temperature range of this research.
In this study ,the sample data was standarded and the data within the range of [-1,1].
Sample data processed according to following formula 6
(6) Where x is the standardized data ,x* is raw data, min x* and max x* are the minimum and maximum values of original data, respectively.
The reduction formula as shown in formula 7
Online since: November 2012
Authors: Amauri Garcia, Daniel J. Moutinho, Laércio G. Gomes, Otávio L. Rocha, Ivaldo L. Ferreira
All thermocouples were connected by coaxial cables to a data logger interfaced with a computer and the temperature data were acquired automatically.
The last step was to provide the theoretical local density for each sample position, based on the macrosegregation profiles (which were experimentally determined by a Rigaku Rix 3100 X-Ray Fluorescence Spectrometer), by using the following equation [17]: (1 ) Results and discussion Fig. 1 shows the temperature data collected in the metal during the course of upward solidification of the Al-6wt%Cu1wt%Si (A) and the Al-6wt%Cu4wt%Si (B) alloys castings in the vertical unidirectional solidification setup.
Moreover, the data acquisition system employed permits accurate determination of the slope of the experimental cooling curves.
Hence, the tip cooling rate,, was determined by considering the thermal data recorded immediately after the passing of the liquidus front by each thermocouple.
The reduction in λ1 for the ternary Al-Si-Cu alloys compared with the corresponding values of λ1 determined for the binary Al-Cu alloy, as shown in Fig.2, lead to a reduction in permeability and hence increased porosity, as shown in Fig. 4.
Online since: December 2013
Authors: Xiao Tong Yin, Yue Tao Ge, Xiao Ming Liu
The main benefits of SHM are as follows: l Reduce cost savings by reduction of inspection and repair costs.
l Enhance the passenger throughput by reduction of unnecessary maintenance.
In addition, advanced data and information processing technology is necessary to handle the information received from the sensors [2] Much effort is taken to look for the most reliable technique for the detection, location and characterization of damage in aircraft structure.
The hardware includes the sensor network and the data acquisition/storing system.
The development of an effective structural health monitoring system must finally be integrated into a structural health management system where the data on structural integrity are classified and where procedures of maintenance and allocation of resources are organized [8].
Online since: August 2018
Authors: Mohammad Javad Mahdavinejad, Peiman Pilechiha, Mojgan Rezakhani
In two weeks, from Saturday to Thursday, data collection continued until 21:00 P.M., before the reduction of the number of pedestrians.
Nonparametric tests are more appropriate for a series of data that their statistical distribution is not normal or have missing data.
Nonparametric methods, unlike parametric ones, are not very sensitive to missing data and this is another excellence of nonparametric methods.
Various nonparametric tests have been expanded for data.
Among the tests, Kendall’s test is the best choice to examine the uniformity process of data.
Online since: March 2019
Authors: Hiroki Kobayashi, Masao Sakane, Takamoto Itoh, Ryohei Ohki
The significant creep void formation is not consistent Fig. 4 Void formation at grain boundary in the cubic specimen after crept for 1800 h at sx = sy = sz = 98 MPa and 973 K with little reduction in the rupture lifetime under biaxial stress states and the reason for this inconsistency should be studied in future.
The estimate of the creep rupture lifetimes by Eq. (1) is quite satisfactory except one datum which is overestimated.
It should be noted that the equation estimates that a little reduction in creep rupture lifetime in the biaxial stress states while a large reduction in triaxial stress states.
Material constants in the equation may vary in other materials and more accumulations of experimental data are needed to enhance the reliability and application range of Eq. (1).
Online since: November 2009
Authors: Maurizio Ferrante
Comparison with experimental data shows that the model describes satisfactorily the W-H behaviour of fcc metals, either pure or in the solid solution condition.
For instance, Ma et al. [36] produced evidence of ductility enhancement of an Al-11%Si alloy processed by rotary ECAP, see Charpy data reproduced in Figure 3.
Data on Ti are more complete and refer to samples with coarse grains (10 µm) and S-mc grains (ECAP, 300 nm and ECAP plus rolling, 150 nm).
Tensile behaviour True stress true strain curves for the two systems under various conditions are in Figure 7 and the respective quantitative data are summarized in Table 1.
Finally, Table 2 summarizes precipitate and grain size data. 200 nm c b 50 µm a d 500 nm Al2Cu 500 nm Table 2.
Online since: February 2014
Authors: Fitria Rahmawati, Dani Gustaman Syarif, Putri Pradnya Paramita, Eddy Heraldy
The impedance data were then fitted with ZView software.
Le Bail refinement on its XRD data found that SDC crystallized in cubic phase with space group of .
Le Bail refinement of XRD data of carbonate-SDC composite shows that the composite contains of two phases, i.e SDC and Na2O, with the molar percentage of SDC is 19.25(1) % and molar percentage of Na2O as phase 2 is 80.75(7) %.
Meanwhile the impedance data of SDC at 600 °C is fitted well with two R-CPE networks (Figure 3(b)) related to grain boundary conductivity and electronic conductivity.
It indicates that the reduction of Ce4+ into Ce3+ occured at 600 °C and produced electrons migration inside SDC structure.
Online since: February 2014
Authors: Jie Zhang, Gil Yong Chung, Bernd Thomas, Stephan G. Mueller, Darren M. Hansen, Mark J. Loboda, Junichi Uchiyama, Timothy J. Toth, Ian Manning, Jeff P. Quast
We have demonstrated continuous improvement in uniformity for thickness and doping, as well as in defect reduction in standard epitaxy on 100 mm wafers.
Furthermore, technical progress is anticipated in the development of wafer quality and wafer diameter expansion with a parallel reduction in cost.
A step change in defect density reduction on 30 µm thick epilayers was also reached.
The focus was to maintain uniformity data of the individual layers in combination with formation of sharp interfaces by avoiding memory effects from previous layer growth.
These data suggest a high quality crystal with a small degree of residual lattice strain.
Online since: July 2013
Authors: Rudolf Kawalla, Friederike Schwarz, Katja Lange, Lutz Krüger, Stephan Reichelt
A reduction of 50% to 67% and a rolling speed of 0.2 m/s were applied.
Furthermore, texture measurements were performed on an X-ray diffractometer in the normal direction at 80% sheet reduction.
These results are in accordance with literature data [13].
Mechanical properties (in RD) of the initial materials and after one ARB pass with varying parameters (ARB process temperature and reduction).
With decreasing deformation degree also the related bond strength drops from 0.51 to 0.34 at 60% and 51% sheet reduction, respectively.
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