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Online since: June 2011
Authors: Shuang Ying Wei, Li Jiang Hu, Di Wang, Peng Zhu
The calculation results showed that the band gap was reduced with the number of Si atoms in POSS increased, but the presence of hydroxyl could make a significant reduction of them.
The reduction of band gap would lower the frequency of the incident light that was absorbed by the POSS and heighten the wavelength of the absorbed incident light, which was proved by the calculation results of absorption coefficient.
Such reduction was discussed in comparison with the vinyltri- methoxysilane hybrid systems.
Characteristics such as the width of the valence band, the energy gap in insulators and the number and intensity of the main features are helpful in qualitatively interpreting experimental spectroscopic data.
The calculation results showed that the band gap was reduced with the number of Si atoms in POSS increased, but the presence of hydroxyl could make a significant reduction of them.
Online since: June 2015
Authors: Christina N. Zavalishina
It is proved that the process of obtaining more objective data can be regulated by reducing or increasing the number of performance indicators.
Rasch model is widely used in education where the initial data are collected through test or survey results.
It is able to turn the measurements made on ordinal scales (in coded values of latent variables) into linear measurements and as a result qualitative data can be processed by quantitative methods.
The compatibility of the data from Form 1 and the Rasch model was determined by Pearson criterion.
The theory of latent variable measurement based on Rasch model is able to · save resources needed to conduct a self-assessment in an organization by finding an optimal combination of self-assessment indicators based on two main criteria: reduction of the number of indicators and reduction of their grades; · avoid difficulties that are often experienced by experts who are setting certain criteria in order to assess an organization in terms of its quality assurance activities.
Online since: October 2011
Authors: S.K.P.N. Silva, H.S.C. Perera, G.D. Samarasinghe
Data collection .Data is collected through multi-methods in which interviews, questionnaires and observations are used.
Partially Grounded Theory technique is used to clarify the data collected from different sources and some respondents were again interviewed to obtain missing data.
Data analysis.
So the gathered data is valid.
Thus it leads to a conclusion that the data gathered to be reliable.
Online since: December 2012
Authors: Eric Liebscher, Don Dussault, J. Desagher, M. Beck, R. Lillard
Here we present comparison data for uniformity, efficiency, particle removal, die reliability and recurring expense of operation; contrasting these two types of megasonic systems.
This presentation includes data obtained experimentally in a laboratory and also in a production line.
The data points of the two lines are obtained by calculating the mean sound field strength along the 10mm axis and plotting is as a single point.
This agrees well with data presented in Hatano and Kanai [1] for intermediate plates at a 4° tilt.
A process recipe was developed that applied a theoretical comparable acoustic pressure in the process tank taking into consideration the inherent power loss of indirect systems. [1,Fig.3] Gate oxide capacitors were processed and data was collected for PRE and die reliability.
Online since: September 2012
Authors: Patrick Dyer
With supporting data, the evaluation of these samples explores the potential of integrating small diameter Nitinol wires into woven structures and the resultant levels of shape transfer, control and cyclic speed achievable.
As part of the ADAPT Project it was noted that with a reduction in the NiTi diameter there was a corresponding reduction in the shape memory effect [12-14].
To balance this reduction it is proposed that a corresponding increase in the NiTi volume fraction would re-establish the shape memory effect.
If the intersections between the SMA and supporting textile is reduced and offers too much freedom of movement, the shape transfer from the wire to the textile sees a corresponding reduction and a more open arc is formed.
The first of these was the increased weight and bulk of the fabric due to the number of warp threads, but more critically the increase in end per inch results in a corresponding reduction in weft threads per inch.
Online since: January 2018
Authors: Surasak Suranuntchai, Sethapong Wangchaichune
The experimental results showed that the initial billet volume was reduced at 32%, which compared favorably with the simulation result of a 40% reduction.
Reduction of wastes. 3.
The distribution of temperature at different reductions during preforming and finish forging operations was shown in Fig. 6, respectively.
Also, the maximum experimental load was higher than the maximum simulation load about 11 %, which affected the reduction of stresses on dies.
In addition, sincere thanks must be given to Thai Summit Automotive Co., Ltd for useful advice and providing the importance data about the parts.
Online since: July 2013
Authors: Chang He Wang, Wei Chao Li, Ji Kun Ou, Xu Hai Yang
In the end, the method has been verified to be successful by calculating and analysing simulated data and practical measured data.
Analysis of Simulated Data.
Table 1 Concrete situation of simulated data No.
Analysis of Practical Measured Data.
Finally, it has been verified that this method is successful by calculating and analysing simulated data and practical measured data
Online since: May 2011
Authors: Gui E Chen, Ying Zhou, Qiong Lu, Zhen Liang Xu
EPS or SMP are filling with the interspaces of the cake layer and resulting in the gradual reduction of the porosity ratio in the cake layer.
The effect of 0.1µm PVDF and 0.1 µm PP MF membranes on membrane fouling using the cake model can be observed in Fig. 4, which represents the evolution of TMP with the filtration progress for experiments conducted with MLSS of 10g/L at a constant membrane flux of 25 L×m−2×h−1.The model calculation shows good agreement with experimental data for both 0.1 µm PVDF membrane and 0.1µm PP membrane.
Deviation of the experimental data from cake filtration mechanisms are less than 5 % while TOC removal for both membranes is found almost no difference between both membranes.
The obtained experimental data have been interpreted by the cake filtration theory and the effect of fouling behavior was quantified by calculating using the cake governing law.
The four-step cake formation mechanism has been put forward as the increment of TMP and the reduction of the cake porosity ratio.
Online since: July 2013
Authors: Zeno Iosif Praisach, Gilbert Rainer Gillich
In previous works, a reliable method to locate open cracks in beams has been proposed and tested using both data from numerical simulations and laboratory experiments.
They focused on methods and data required for damage identification by examining the changes in various types of measured structure responses.
The use of inverse methods in damage detection and location using measured vibration data is largely presented by Friswell [4], together with problems that exist with this approach to health monitoring; among these, modeling errors and environmental effects are the most important.
A prismatic steel beam fixed on the left end and free on the right end was used as a structural model, to provide vibration data for its intact and damaged states.
Fig. 4 present in the left diagram the damage location index expressed by six elements Φi for three locations (x/L = 0.335; x/L = 0.415 and x/L = 0.5 from the fixed end) and in the right diagram the normalized relative frequency shifts Ψi from measured data, for a crack placed at x/L = 0.5 from the fixed end.
Online since: April 2019
Authors: Bao Ying Lu, Xu He Hou
In Situ Rapid Dechlorination by Microwave-Assisted Catalytic Reduction of Chlorobenzene and 1,4-Dichlorobenzene on Raney Ni-Al Alloy Catalyst Baoying Lu1,a, and Xuhe Hou1,a* 1Guangxi University of Science and Technology, Chemistry Department, 545000, Liuzhou, China a*Corresponding author: 100000778@gxust.edu.cn Keywords: Microwave-assisted catalytic reductive, Dechlorination, Raney Ni-Al alloy catalyst Abstract.
In recently years, many methods have been used for degradation of chlorinated organic compounds, among which zero-valent metal reduction has been used in water remediation for over a decade.
Some typical metal catalysts, such as noble metals and transition metals, have been used for catalytic reduction of chlorinated organic compounds[5-10].
Among such zero-valent metal catalysts, Raney Nickel, used as a heterogeneous catalyst, has good efficiency for catalytic reduction in a hydrogen atmosphere[11-14].
The specific surface area, SBET, was calculated according to the BET model by the multipoint method from the data obtained in the range 0.05 < P/P0 < 0.3, where P/P0 is the relative pressure of nitrogen and P0 is the saturation pressure of nitrogen.
Showing 7761 to 7770 of 40694 items