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Online since: August 2013
Authors: Kwing So Choi
After the state-of-the-art examination of the drag reduction performance, different views on the drag reduction mechanism are put in perspective.
The NASA’s results obtained by Walsh et al. [7] are shown in Fig. 2, which are compared with other data obtained elsewhere.
Squire et al. [8] measured the turbulent drag reduction with riblets at transonic speed in the Cambridge wind tunnel, while Gaudet’s data [9] comes from RAE’s transonic tunnel at M = 1.25.
Sullivan, Flight-test of turbulent skin-friction reduction by riblets, in: Turbulent Drag Reduction by Passive Means, Royal Aeron.
Morris, Drag reduction article, U.S.
Online since: May 2004
Authors: D. de Graaf, H.T. Hintzen, G. de With, S. Le Rol, L. Le Gendre
Reduction of Lanthanide Ions in Si-Al-O-N Glasses D. de Graaf1, S.
Reductions have been observed in the case of Eu3+ [3] and Ce 4+ [4], which reduce to Eu2+ and Ce 3+ during the synthesis of these glasses.
Comparison with literature data showed the simultaneous presence of Sm2+ and Sm3+ transitions.
However in contrast to the previously studied (Eu,Y)-Si-Al-O-N glasses this reduction is only partial.
This is a clear sign that the reduction process takes place during the hottest stages of the melting process, and that the reduction itself is very slow.
Online since: January 2016
Authors: Krisztina Severnyak
Overhead reduction or energy efficiency measures Krisztina Severnyák Debrecen University, Doctoral School of Earth Sciences, Egyetem square 1.
According to the data of KSH (Hungarian Central Statistical Office)[7], more than 800 000 buildings were constructed manually from such blocks, so their examination and renovation are indeed due Fig. 2.
According to KSH census data from 2011[6].
All the further calculation models included these reductions.
This period may be further reduced by subsidies (enforced reduction of utility costs).
Online since: June 2010
Authors: Chun Jian Deng, Liu Wei, Xi Feng Zheng, Liang Yang
Another one is based on the use of test data compression (TDC) techniques, which has been at the forefront of solutions to reduce test costs through reduction in tester storage and test application time[1~16].
A method called COMPACT is presented in [10], the key idea of COMPACT is to employ two data compression schemes, run-length coding for data with low activity and GZIP for data with high activity.
In the paper, we analyze the application condition of a compression algorithm for test data, and denote a test data compression method RLE-G, Run Length Encoding based on Golomb coding, that provide significant compression for pre-computed test sets and lead to considerable reduction in testing time, it has the excellent advantages of high compression ratio and low overhead.
As the original test data are stored on the ATE side, and the test data stored in memory of the ATE in compressed (encoded) form (TE).
Therefore, to reduce the data expansion and get highest compression efficiency, the analysis of the overall data coding results is needed.
Online since: November 2013
Authors: Suwanna Ponpakdee, Pallapat Penchamrat, Wanatchapong Kongkaew, Sakesun Suthummanon, Nikorn Sirivongpaisal
An Application of Lean Supply Chain Management for Cost Reduction in Latex Industry Suwanna Ponpakdee1, Nikorn Sirivongpaisal2, Sakesun Suthummanon3, Wanatchapong Kongkaew4, Pallapat Penchamrat5 1, 2, 3, 4 Department of Industrial Engineering, Faculty of Engineering, 5 Department of Business Administration, Faculty of Management Science, Prince of Songkla University Corresponding author: na_dium@hotmail.com Keywords — Lean Supply Chain Management, Latex Industry, Cost Reduction Abstract — The objective of this research is to reduce the total systemwide cost of the latex industry supply chain.
In general, a major lean manufacturing function is in the reduction of wastes.
An optimal operation, however, could mean an increase of apparent wastes in one part of the supply chain to allow for a larger reduction of wastes elsewhere.
Application of VSM in SCM not only can help identify VA and NVA activities for waste reduction and elimination, but it can also help recognize the status of the lead time and the total cost in the supply chain from incoming parts to the finished goods. 3.
Three main steps are involved in this research: Firstly the entire supply chain data are carefully collected and analyzed; these are used to create a supply chain model for the latex industry.
Online since: November 2013
Authors: Yun Wen Zheng, Quan Mei Gong, Yun Zhuang Zheng
The closer to the railway, the greater the reduction rate. 2.4 Analysis for the real-data of typical cross-section After processing the real-data of the project, the central deformation of different sections of the line is demonstrated in Form 5, and the curve showing how the central vertical deformation of Line A and Line B vary with time is demonstrated in Fig 4.
Accordingly, the numerical simulated data and the real-data of these two processes for curve comparison.
Besides, the real data exceeds the simulated data by 1.9mm.
The simulated data are basically consistent with the simulated data, except for that of Line A, whose error rate is 20%.
The real data are generally consistent with the simulated data.
Online since: January 2016
Authors: Piotr Szulewski, Igor Ostrowski, Andrzej Masłowski
All this machines contaminate radio environment around them and make serious obstacles for WiFi data exchange.
Analyzing the curve presented in this figure we can notice that data transfer decreases four times in distance of 50 meters.
All data interchange between computer and AGV were done by this AP.
As a final effect we can observe stable (but not so high) data transfer rate.
It means that next data frames were supplied by different paths (not only straight way).
Online since: August 2014
Authors: Su Zhang, Li Hao Ai, Ying Feng Sun, Jin Gui Wang
So noise reduction is also important.
Then we analysed the characteristics of electromagnetic radiation signal after noise reduction.
There are 2 main effects: removal ofoverlappingwaveandmakemoresymmetricwaveform.To the original signalX(t),firstly, find outall of itsextreme points. then the3 spline functionfor all of themaximum pointinterpolation,thusfittingthe original signal X(t)on theenvelope of the Xmax(t) and the lower envelope of Xmin(t).At this time,all data contained in the signals envelope.Connect envelope mean in sequence,then get a mean line m1(t),then X(t)minus m1(t) is h1(t).For differentsignals,h1(t)may be a kind of intrinsic mode function(IMF)component,it also may be not;in general,it does notsatisfy with the IMFconditions[7],the h1(t) is regard asthe original signal,repeat the above steps,namely h11(t)= h1(t)-m11(t),m 11(t) is thelower envelopemean of h1(t);if h1(t)is not a IMFcomponent,then continue toscreening,repeat the abovemethod k times, k timestothescreening of the data h1k(t)= h1(k-1)(t)-M1(1-k)(t).h1k(t)is not a IMFcomponent,there must bea screening processterminationcriterion,itcanusestandard
Seismic data de-noising based on wavelet transform [J].
(in Chinese) [9]Z H WU, N E Huang.Ensemble empirical mode decomposition: a noise-assisted data analysis method[J].World Scientific,2009,1(1):1-41.
Online since: February 2013
Authors: Ya Lun Hu, Zheng Li, Zhong Xu
The drag reduction effect is declined.
The drag reduction is enhanced by increasing the contact angle.
This paper is going to combine microbubbles drag reduction technique and nonsmooth with hydrophobic surface drag reduction technique to improve the adhesion problems of microbubbles.
The interface play the drag reduction effect greatly.
[8] Hughes N.J, Reischman M.M, Holzman J.M, Digital image analysis of two phase flow data, Proceedings of the 6th Biennial Symposium on Turbulence, University of Missouri, 1979.
Online since: May 2011
Authors: Zheng Wang, Cheng Yang, Fen Fen Li, Wen Yu Zhang, Jin Hu Wu
The photocatalytic reduction of CO2 could be achieved over Cu/S-TiO2 under UV and visible light irradiation.
Consequently, photocatalytic reduction of CO2 over powdered catalysts is one of the most feasible methods to convert CO2 [6].
For photoelectrochemical reduction of CO2, the semiconductor anode under UV or visible light illumination produces electrons, which transfer through the external circuit to the metal cathode for the reduction of CO2 to hydrocarbons and alcohols, and holes that oxidize water to oxygen/protons [7].
All data of the reaction were taken at various times after turning on the UV light.
The effect of irradiation time on the gas products of CO2 photocatalytic reduction is shown in Fig. 5.
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