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Online since: August 2012
Authors: Daniel R. Cornejo, Ruth Herta Goldsmith Aliaga Kiminami, Ana Cristina Figueiredo de Melo Costa, Débora A. Vieira, Verônica Cristhina S. Diniz
This is due to the increase in crystal size, leading to a reduction in lattice parameters.
For the data obtained by the method adsorption of nitrogen/helium, one can observe that the samples obtained by combustion reaction using urea as fuel showed high surface area, 75, 77 and 38 m2/g for samples 450U, 600U and 900U, respectively.
There is a reduction of 50.6% of these values with increasing power.
These data are in agreement with results of X-ray diffraction.
There is a 28% increase compared the sample 450G with 630G, and then a reduction of 37%.
Online since: July 2014
Authors: Gang Bing Wu, Shan Jiang, Jin Chang Wang, Ya Ting Zhang, Chun Xiu Zhou, Zhi Yi Huang
In 1994, Ganchang Wu[5] did some theoretical analysis based on a vast amount of observed data, and brought up a exponential decay function on the relationship of temperature variability and pavement depth when temperature change occurred at the surface.
According to the actual temperature data during the whole year of 2012 in test road located at Mu Dan Jiang, it was showed that the lowest temperature is -16.98oC on December 11th when the highest temperature is -4.76oC.
After analyzing temperature variation at various depth and various wind speed, it is found that temperature at different depth decreases following the reduction of surface temperature and with a nearly same reduction range, which behaves that the surface temperature gradient Tg is roughly the same.
There is a reduction of 66.7%, 48.1% for the temperature of surface bottom and base bottom respectively after the coefficient increases from 1.061 to 2.661.
Fig. 11 Mise stress nephogram of dowel bar Fig. 12 Maximum principal tensile stress nephogram From table 2, cement concrete panel horizontal cracking displacement increases nearly 43% when the surface thickness increases from 20cm to 28cm; warping effect is appeared at the cracking with the displacement enhancing 6.4times on account of the impact of temperature stress; contact pressure between dowel bar and concrete increases gradually before saltation occurs, this is because the contact pressure is too large so that a reduction of stress concentration appears after the concrete experiencing local damage; concrete panel warps due to temperature stress, leading to concrete pavement void with the displacement increasing 78%, of which the impact is significant.
Online since: May 2014
Authors: Gerhard Hirt, Michele Vidoni, Arne Mendel
The correct centering of the cast profile on the rolling profile and a uniform reduction across the strip width are necessary to avoid flatness problems.
The work-rolls to be used for the rolling operation need to be designed for a specific reduction and product thickness.
In the present study, in order to limit the measurement error, the temperature data acquired with pyrometers and thermocamera has been specifically calibrated using a conductively heated as-cast strip to determine the emissivity of the specific steel alloy and surface condition.
The numerical model was fitted to the experimental data obtained from four profile casting experiments.
For the selective coating the experimental data lead to a heat transfer coefficient of αcast = 6.30 kW/m2K.
Online since: June 2014
Authors: Shigeo Saimoto, Hai Ou Jin, Kaan Inal
From the true stress – true plastic strain data sets, CRA were performed and the resulting parameters are listed in Table 1.
Eq2 below can replicate the σ – ε data using at least two fitting curves:
The derived shear stress τρ = {(σ0final – 49.76)/M + τ3} from the tensile data in Table 1 versus the thickness shear strain.
The reliable optimum fits are for β2 and β3 because the original tensile data was not reported and hence the initial β1 is approximate as indicated by dashed line in the log λ versus log τ plot.
Dashed-line indicates ambiguity due to scanning of printed data.
Online since: December 2010
Authors: Chun Xia Zhao, Wu Zhou, Mian Hao Zhang
When Simultaneous Localization and Map Building is carried out in complex environments, reduction of computational complexity is a key problem.
The intelligent vehicle for data collection Fig. 3.
Experimental data are collected with a laser range finder, a GPS, and an inertial sensor.
Simultaneous localization and mapping with unknown data association using FastSLAM[C].
[7] Information on http://www.personal.acfr.usyd.edu.au/nebot/experimental_data_ute.htm
Online since: May 2014
Authors: Matthew Cruickshank, Graham Doig
This work explores how kriging can allow the trends from highly sampled data, such as track running, to be applied to less sampled data, such as CFD to improve computational and overall aerodynamic analysis.
The CFD model was validated against existing WT data.
In addition to the WT data, track data was also supplied by Carlin Motorsport.
The higher variability of the track data is clearly seen.
Nowlan, "Refining aeromaps from pitch data," Racecar Engineering, vol.
Online since: December 2014
Authors: Jolanta B. Krolczyk, Marek Tukiendorf, Rafał Dawid
The changes in the quality of the mixture after reduction the mixing time from a standard time of 30 minutes to: 25 minutes, 20 minutes and 15 minutes have been analyzed.
Data collected in this manner (weight values) were calculated into percentage shares.
Launching the agitator contributed to the reduction of the secondary segregation effect bringing the concentration of the yellow millet and white rice to the value assumed by the producer.
In the bag no. 44, we notice clear reduction of the numerical value of the RSS parameter compared to the value from the previous bags (no. 28 and 36) confirming the increased quality of the product.
Online since: August 2014
Authors: Yun Fei Chen, Zhong Kun Hong
An automatic counterbalancing model of balls with different torsion damping coefficient is designed for vibration reduction.
The data output of the movement in the x-z plane can be seen from the plot (a) in Fig. 2 when observing the cabinet from its front.
Savaresi, Giuseppe Fraternale, Nicola Gaudiano, Control of magnetorheological dampers for vibration reduction in a washing machine, Mechatronics. 19 (2009) 410-421
[10] Seok-Ho Son, Sang-Bin Lee, Dong-Hoon Choi, Experiment-based design optimization of a washing machine liquid balancer for vibration reduction, International Journal of Precision Engineering and Manufacturing. 13 (2012) 1433-1438.
Online since: November 2011
Authors: Mei Lan Qi, Chang Peng Chen
The calculation results indicate that both the doping of La and the doping of In induce effective reduction of the band gap of SnO2, the impurity elements form new highly localized impurity energy level at the top of the valence band near the Fermi level.
The equilibrium lattice constants after optimization illustrated in the Table 1 are very close to the experimental data[13],which assures the reliability of our method.
Figure 8 illustrates the absorption spectrum of doped SnO2 and pure SnO2, where varying degrees of reduction occurs at each peak due to the decrease of absorption intensity caused by the decrease of the local carrier’s concentration, which consequently make the transition probability decrease.
The calculation results indicate that both the doping of La and the doping of In induce effective reduction of the band gap of SnO2, the impurity elements form new highly localized impurity energy level at the top of the valence band near the Fermi level.
Online since: January 2012
Authors: Yong Taeg Lee, Seung Hun Kim, Tae Soo Kim, Yong Hyun Jo
Moreover, FE models with free edge and restrained out-of-plane deformation for curled specimens are analyzed additionally, therefore, the influence of curling on the ultimate strength; strength reduction ratio is estimated.
Since ABAQUS program uses true stress and true strain, the values of nominal stress and nominal strain are converted to true stress and true strain as the plastic material data.
Ultimate strength ratios(Pua/PuaR) ranged from 0.91 to 0.98, i.e., curled specimens showed the ultimate strength reduction by 2-9% compared with specimens with restrained curling due to sudden strength drop caused by curling.
Curling resulted in the ultimate strength reduction by 2-9% for specimens with free end compared with FE models restrained from curling..
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