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Online since: August 2012
Authors: José Antônio Eiras, Daniel Thomazini, Maria Virginia Gelfuso, Gabriel Moreira Lima
In this study CCTO powders were produced by a new chemical route, providing reduction on hold time and sintering temperature.
The structure of CCTO was previously determined from neutron diffraction data powder.
Online since: July 2012
Authors: Heng Hai Zhang, Xiao Kang Chen, Chang Feng Zhou, Gui Qing Zhao
The maximum structural stress is reduced by 35.1% on the basis of reduction by 4.7% in total weight, which indicates the modification improves the mechanical and modal performance greatly.
Compared with data in Table1, the frequency of same order is increased or kept unchanged, which guarantees the good vibration characteristics of thrust rod.
Online since: December 2012
Authors: Hong Tao Hu
The experimental results showed that the pH value has varied obviously because of the oxidation and reduction near the electrodes, i.e. the pH value near the anode changed from 6.5 to 5.9 but near the cathode it varied from 6.4 to 8.9 in the experiment process, which indicated that the condition of acidity, alkalinity and other environment factors in groundwater had varied clearly during the electrokinetic remediation process.
Introduction The research data showed that the groundwater was already contaminated seriously in China, which indicated that 64% of urban groundwater was contaminated severely, 33% of them received a mild polluted and only 3% of urban groundwater was basically pure in an assessment of the groundwater quality for 118 cities [1].
Online since: August 2013
Authors: Dong Qi Wang, Huan Guang Deng, Zhen Lou Chen
Yangtze estuary data, collected over three years, indicates that the temporal and spatial distributions of the environmental gradients reflect complicated seasonal changes and spatial differences in the exchange flux of the dissolved inorganic nitrogen (DIN= NH4++ NO3-+ NO2-) across the sediment-water interface.
Analysis and Data calculating.
They were measured using colorimetry after Zn-Cd reduction, the sulfanilamide and N-(1-naphthyl) ethylene diamine dihydrochloride colorimetry and sodium hypobromite oxidation colorimetry, respectively [21].
Figure 4 Annual average exchange fluxes of dissolved inorganic nitrogen at the sediment-water interface along the tidal flat of the Yangtze estuary (mmol·m-2·d-1) The DIN interface exchange flux data (Figure 4) had wide range, and the average was -3.84 mmol·m-2·d-1, but the fluxes at all the sites had a one to two order of magnitude range from positive to negative (-49.8~24.2 mmol·m-2·d-1).
DIN interface exchange flux data indicate that the DIN flux in Yangtze estuarine tidal flat are comparable with other estuaries in the world, but that it has a wider range of changes from positive to negative than the other area [8, 12], these data suggest that the transfer and the transformation rates of the DIN exchange through the sediment-water interface are active in the Yangtze estuarine tidal flat.
Online since: July 2020
Authors: Leonid Fursin, Mikhail E. Levinshtein, Pavel A. Ivanov, Vitalii V. Kozlovski, Anatoly M. Strel'chuk, Alexander V. Zubov, Alexander A. Lebedev
From the data of noise spectroscopy, the density of traps in the gate oxide Ntv has been estimated.
From the data presented in the inset to Fig 4 one can conclude that the external transconductance is very sensitive to the dose F in the range 1012 cm-2 ≤ F ≤ 4×1013 cm-2.
Frequency of analysis f = 1.22 Hz; Vd = 0.14 V Comparing the data shown in Figs. 2 and 5, it is easy to make sure that there is a correlation between the value of the drain saturation current and the level of low frequency 1/f noise.
This value is comparable to the value h = 3.5 observed in [7] Using the data presented in Fig. 6, one can roughly estimate the effective density of the traps in the gate oxide Ntv [8].
The density of traps in the gate oxide Ntv was estimated from the data of noise spectroscopy.
Online since: April 2022
Authors: Paulo B. Lourenço, Rafael Ramirez, Bahman Ghiassi, Daniel V. Oliveira
Nonetheless, accelerated aging data cannot be used to make reliable service life estimations without a clear correlation with real environmental processes.
However, without real exposure data to reveal the actual degradation phenomena, the accelerated degradation trends must be treated with caution since they may lead to unrealistic results.
The scope is to provide real exposure data to correlate the accelerated aging results, which still lacks in the literature.
The environmental data corresponding to RE1 were retrieved from a nearby meteorological station.
It must be noted that the presented data constitute only preliminary results in the framework of a much more comprehensive experimental campaign.
Online since: May 2025
Authors: Nguyen Gia Lam, Dinh Duy Khoa, Pham Quang Trung
The simulation results were compared with experimental data and previous studies to validate the model’s accuracy.
At 4 mm, a decrease in compressive stress is noted, though it remains significant, suggesting that farther from the axis of rotation, an increased cooling rate promotes recrystallization and stress reduction.
Stress-strain data for aluminum 6061-T651 from 9 lots at 6 temperatures under uniaxial and plane strain tension.
Data in Brief, 25 (2019), 104085
Online since: November 2013
Authors: Ye Gao, Ya Hui Zhang, Guang Zun Ouyang
Table 4 The variance analysis results Source of Variation Deviation Square Degree of Freedom Mean Square F Critical Value Significance A 3.08 2 1.54 62.89791 F0.01(2,2)=99 ** B 0.40 2 0.20 8.07441 F0.05(2,2)=19 C 1.74 2 0.87 35.53358 F0.1(2,2)=9 ** Error 0.05 2 0.02 Sum of Squares 5.2654 8 The variance results shows that dispersion of dosage of the starch and sodium oleate is larger, that means experimental result data has a lot difference and is disperse, significance analysis: F0.05(2, 2) < 35.53 < F0.01 (2, 2), F0.05 (2, 2) < 62.90 < F0.01 (2, 2).
The Interaction analysis results shown as figure 4, figure 5, figure 6 : Figure 4 The interaction of lime and starch Figure 5 The interaction of collector and starch Figure 6 The interaction of lime and collector From quadratic sum of the deviation, the experiment dosage of starch is far more than the other two datas, which shows selected experimental point of the starch’s dosage is unreasonable.
R value of the starch is also the biggest, that is to say starch influences most on the results, when the experiment uses too much starch, the indicator is not well based on the experiment data. only a set of data is better because of adding more the corresponding sodium oleate . flotation reagents increases flotation costs, the group experiment is not desirable, so give priority to consider the influence of collector single factors ion the flotation results, dosage of starch is 1000 g/t, when lime dosage is 2000 g/t ,change collector dosage, the experimental results are shown in figure 7.
Research of He Zhang Guizhou Oolitic Hematite Direct Reduction and Magnetic Separation, Metal Mine,NO.11(1997),P13-16.
Online since: October 2013
Authors: Can Cui, Rong Bin Li
Fig.1 Thermocouple specimen (2) Experimental system and device Diagrammatic sketch of grinding temperature measurement platform is shown in Fig.2. 1-Grinding machine workbench 2-Fixture 3-The first half of workpiece 4-The first cellulose tape 5-The first lame 6- Grinding wheel 7-The second cellulose tape 8-The second lame 9- The third cellulose tape 10-The second half of workpiece 11-The first lead wire 12- The first signal amplifier 13-Computer 14-Data acquisition system 15-The second signal amplifier 16-The second lead wire 17-Ergometer Fig.2 Diagrammatic sketch of grinding temperature measurement platform Straight surface grinding experiments were conducted on a CNC high-speed surface grinder using an alumina grinding wheel of diameter ds=180mm and width bs=6mm.The workpiece was 45# steel 18mm along the grinding direction,30mm wide, and initially 50mm high.The data acquisition system consisted of NI USB-6210 type data acquisition card, LabVIEW and three-way dynamic piezoelectric
(2)After destroying the integrity of the workpiece by thermocouples, thermocouples and air were sandwiched between two halves of the workpiece,which caused a certain reduction of the overall thermal conductivity,k and density,ρ and a certain degree of error of specific heat capacity,c
Here we take one set of datas,Vs=2200r/min,Vw=10m/min,ap=8μm for analysis.Researches were done by varying the influencing factors above to observe changes of theoretical temperature curves: (1)When the grinding heat flux, qw decreased by 5%,changes were shown in Fig.6.
Online since: December 2011
Authors: Wen De Bu, Jin He Liu
The verifying trial was carried out and the predicted temperature was compared with the experimental data measured by means of thermocouples.
The constitutive relationship of the metal in different temperature is set up by experiment data.
Subsequently, the temperature near weld line began to go down resulting from the reduction of the speed of flywheels.
The temperature data was recorded by an industrial personal computer.
The simulating values of the temperature are compared to the experimental data in Fig. 6.
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