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Online since: April 2012
Authors: Fan Yi Hsu, Shun Wu Lin, Ducky Liao, T.J. Yang, Scott Ku, C.M. Yang, Matt Yeh, Eric Houyang
Full wet process for resist strip was first successfully demonstrated at 22nm structure wafer to gain 50% silicon loss reduction.
In this work, we have first demonstrated HT_SPM full wet process at LDD (light dosed doped) loop of 22nm structure wafer to gain silicon loss 50% reduction.
By all data analysis, it’s proposed that oxidation and acid-hydrolysis reaction occurred simultaneously at the surface of SiN film when HT_SPM processing on SiN film.
It’s observed oxide etch amount will increase while SPM dispense time increases, relative oxide etch amount data are shown in Figure 4.
Silicon loss reduction by full wet.
Online since: October 2011
Authors: Fu Sheng Liu, Han Bing Bian
The result shows that the soil saturation degree largely affects the free field response to cyclic loading, with a decrease in soil saturation leading to a decrease in the rate of generation of excess pore-water pressure, and consequently to a reduction in the liquefaction risk.
Research conducted on unsaturated soils showed that a small reduction in the saturation degree could result in a significant increase in the liquefaction resistance of sands.
The decrease in the saturation degree causes a reduction in the liquefied zone.
The influence of the water table depth on the excess pore-water pressure at = 5.0 sec (Fig. 4) showed that the increase in leads to an important reduction in the excess pore pressure.
Fruth, VELACS Verification of liquefaction analyses by centrifuge studies laboratory testing program soil data report: Soil data report.
Online since: February 2012
Authors: Zhi Gong Wu, Xiao Feng Guo, Yan Li
Comprehensive effect evaluation system for UIG regional cooperative innovation is a multi-level system, it concludes large amounts of information and indexes, which could use rough sets to do the attribute reduction for the data in this complex system, which means that helping us to reduce the data of this evaluation model, so as to improve the simplicity of the evaluation results.
Using expert scoring method, the data is complete, true and credible.
The application of rough set on qualitative indicators of reduction 1) Use ROSETTA software to open the set of experimental data in decision table. 2) Discretize process.
Application of Equal Frequency for data discretization.
In order to make the data more persuasive, the data of this article comes from different universities, enterprises and government experts 7, 17 experts and 22 expert, 6 groups of data as a test set, the remaining 44 groups of data as a training set, the test set. 2) Data format conversion.
Online since: September 2006
Authors: Jian Lu, Abel Cherouat, Olivier Sicot, X.L. Gong, Xiao Jing Gong
The association of these data makes it possible to highlight the important dependence existing between the residual stresses level introduced by manufacture and the aging treatments of composite materials.
After 4h and 8h of post cure, the residual stresses reduction is reduced to 20%.
On the other hand, the stresses reduction is around 10% for 2h of post cure.
Thus, after a certain time, the increase of the post cure duration does not cause any significant reduction of the residual stresses level.
However, for standard cure cycle, the reduction stresses level is very weak due to the short time post cure.
Online since: November 2012
Authors: Dong Lian Tan, Wen Hua Yan
In the specimen loading process under every level of load the mid-span deflection and stiffness reduction coefficient is shown in Table 1, the statistics data of beam’s crack width is shown in Table 2.
And the regression equation of the bending stiffness reduction coefficient and crack height coefficient is obtained: (1) Correlation coefficient: R=0.73041 Figure 1 Regression figure of bending stiffness reduction coefficient and crack width Relationship between Crack height and Bending Stiffness Reduction Coefficient Crack height directly affects the moment of inertia of beam’s effective cross-section, with the crack developing along the beam height, the section neutral axis rise, and the bending stiffness reduction coefficient decreases.
Figure 2 Relationship curve of bending stiffness reduction In order to better study the relationship of crack’s developed height and bending stiffness reduction coefficient, the crack’s height coefficient H is introduced, i.e
Therefore, bending stiffness reduction coefficient .
Due to the limited test data of this paper, it can’t reflect the obvious law between crack spacing and stiffness reduction coefficient.
Online since: October 2013
Authors: Xiao Yan Song, Yang Gao, Xin Long Wang, Hai Bin Wang, Yao Wang, Xue Mei Liu
The nanocrystalline WC-Co bulk material with a relative density of 98.5% was prepared by combing in-situ reduction and carbonization reactions and spark plasma sintering method.
The WC-Co composite powder was fabricated by in-situ reduction and carbonization reactions [8].
The data is not stable as the penetration depth is not deep enough (for example less than 300nm).
As the penetration depth is larger than 300nm, the contact area of the indentation is large enough to eliminate the up negative effects to the precise of the measured data, especially to cause more WC grains and Co phase to deform together.
Conclusion The nanocrystalline WC-Co bulk material, with a relative density of 98.5% and a mean grain size of 90nm, was prepared by combing in-situ reduction and carbonization reactions and spark plasma sintering.
Online since: December 2012
Authors: Quan Sheng Liu, Ke Duan Zhi, Run Xia He, Fang Wu, Ya Gang Zhang, Li Yang
The present work aims to bring new data about the effect of alkali charge in co-precipitation preparation of Cu-Mn mixed oxide catalyst as WGSR for fuel cells.
Reduction peak of α presents the reduction of highly dispersed non-crystalline copper oxide strongly interacting with manganese oxide and that of smaller copper oxide particles weakly assisted with manganese oxide.
Reduction peak of β may be assigned to the reduction of surface copper oxide (crystalline) and subsurface Cu-Mn Solid solution (crystalline) which stronger interacted with surface oxygen vacancies.
Catalytic performance closely related to the (β+λ) reduction peak (Surface phase reduction peak and bulk phase reduction peaks closely combinated with oxygen vacancy of Cu-Mn solid solution) area.
The (β+λ) reduction peak area of catalyst become larger, catalyst had better low-temperature activity.
Online since: June 2014
Authors: Romain Boman, Jean Philippe Ponthot, Yves Carretta, Maxime Laugier, Maurice Tornicelli, Jakob Ilsted Bech, Nicolas Legrand
Reduction effect on friction for pilot cold mill.
Rolling data of 186 light gauge tin plate coils of the same grade have been collected on a ArcelorMittal recirculated coupled tandem cold mill in two different situations: at slow rolling speed (~150 mpm) during flying gauge change, slow speed data, and at high rolling speed, high speed data (the coils are the same for slow and high speed data).
Slow speed data have revealed a great variation of strip reduction from coil to coil in stands 4 and 5, probably because the exit thickness for light gage coils is not all the time controlled during flying gauge change.
All the calculations were made for 27% reduction.
Reduction = 27% Conclusions and future steps.
Online since: February 2014
Authors: Sunil D. Majagi, G. Chandramohan
In the study process factors namely feed rate, speed and coolant were analysed to understand the effect on the surface roughness, percentage (%) of thickness reduction, grain size and hardness of the Aluminium (Al) sheet metal after forming.
But these method have exhibited several defects in sheet metal forming, namely build up, surface cracks, surface finish, uneven thickness reduction, dissimilarity in hardness etc.
The obtained experimental results surface roughness, % of thickness reduction, grain size and hardness are tabulated below (Table 1).
RESULTS AND DISCUSSIONS The Software Design Expert (Version 8.0.7.1, State-Ease Inc., Minneapolis, USA) has been used for the experimental design, data analysis, and to build linear, 2FI and quadratic model.
Table 2 Model summary statistics for surface roughens, % of thickness reduction, grain size and hardness of incremental forming Source Standard deviation Mean R2 Adj.
Online since: January 2013
Authors: Hiroyuki Yaguchi, Yasuto Hijikata, Sadafumi Yoshida, Shuhei Yagi
In this report, we try to apply the SCEM to the growth rate data at various oxygen partial pressures and discuss the oxidation mechanism of SiC more in details by making a comparison between calculated growth rate curves and the observed ones.
The figures indicate that: (1) the observed data show an abrupt reduction in the thickness region less than 10 nm especially in the case of lower partial pressure, (2) after the abrupt reduction they gently reduce, (3) the calculated curves successfully reproduce the observed growth rates though restricted in the mild deceleration region, (4) the calculated curves show the rapid reduction more remarkable as higher partial pressure, which is opposite tendency to that of observed data.
The figures and point (1) indicate that the growth rate in the abrupt reduction region slightly decreases with decreasing partial pressure [5].
Although the calculated growth rate curve is still deviated from the measured data, we consider that further refined parameters will make a better fit to the observed data.
The calculation results exhibit that a rapid growth rate reduction in the initial oxidation stage eased as lower pressure, which is opposite tendency to the observed growth rates.
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