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Online since: February 2007
Authors: Tao Yan, Xiao Lin Liu, Jian Feng Chen
Table 1 Characteristics of nanocomposites prepared in this work SBET(m 2/g) Cu/(Cu+Ce) (molar ratio) average grain size (nm)a D(111) (nm)b 673K 873K 1073K 1273K Pure CeO2 30 10 23 44 33 9 0.05 25 9 44 69 50 35 0.1 20 6 42 49 38 27 0.12 25 7 27 38 33 19 0.15 25 7 23 25 26 10 a Calculate from TEM micrographs.
Acknowledgements This work was supported by the Talent Training Program of the Beijing City under grant number 9558103500 and the Fok Ying Tung foundation under grant number 81063.
Online since: October 2024
Authors: Muhammad Tahir, Ahmad Nawaz, Fahd Nawaz Khan, Muhammad Ali Kamran, Rizwan Mehmood Gul
The overall number of primary TKRs has risen by 99.1% from 1998 to 2009, whereas the number of primary THRs has ascended by 11.3% [5].
Small spherical grains that are characteristic of films deposited by magnetron sputtering are visible on the film surface [17].
Online since: October 2006
Authors: Urban Forsberg, Erik Janzén, Martin S. Janson, Margareta K. Linnarsson
This is normally true for hydrogen that migrates between interstitial sites in a defect free lattice, but hydrogen is known to become trapped by donors and acceptors, as well as "dangling bonds" in vacancies, dislocations and grain boundaries [1].
In epi1, the 2H2/ 1H2 mixture was employed during the 2 Sample number Substrate Epitaxy Thickness [µm] B [cm-3 ] Al [cm-3 ] N [cm-3 ] 1 n-type, HTCVD epi1 380 1·10 15 <2·10 14 3·10 18 2 n-type, HTCVD epi2 380 1·10 15 <2·10 14 3·10 18 3 Semi, HTCVD, epi1 355 7·10 14 <2·10 14 <5·10 15 4 n-type, sublimation epi1 390 5·10 15 1·10 15 7·10 18 5 p-type, sublimation epi1 415 3·10 16 8·10 17 - Table 1.
On the other hand, Sample number Substrate Csurf [cm-3 ] Cmid/Csurf 2H2 "exposure" [min] Deff [cm2s-1] Csurf·Deff [cm-1s-1] 1 n-type, HTCVD 1.4·1016 0.41 25 7.5·10-8 1.1·10 9 2 n-type, HTCVD 8.5·1015 0.26 10 1.3·10-7 1.1·10 9 3 Semi., HTCVD, 9.5·1015 0.83 25 1.7·10-7 1.6·10 9 4 n-type, sublimation 2·10 15 - 25 - - 5 p-type, sublimation 1.4·10 15 1 25 - - Table 2.
Online since: September 2011
Authors: Yang Jiang, Wei Zhong He, Wen Bin Sun
Prediction of blast pressure Blast wave parameters for conventional high explosive materials have been the focus of a number of studies from 1950’.
The fragmentation debris can be analyzed in terms of the shape parameter, which is the ratio between grain length and width.
Therefore, to simplify the analysis, a number of assumptions related to the response of structures and the load has been proposed and widely accepted.
Online since: May 2011
Authors: Shu Cai Li, Gao Sheng Wang, Yu Hua Guo
With DMPA content increases, hard segments of WPUs chains increase, the Coulomb force and  hydrogen bonds between/in molecule chains increase, which make the structure of sized films close-grained, water resistance improves and Cobb value of sized papers decreases.
At the same time, the end-capping isocyanate groups increase, the number of chains increases too.
When NCO/OH molar ratio is from 1.6 to 2, NCO content increases, number of molecular chains increases, relative molecular weight decreases, particle size and viscosity decrease. 3.4.2 Effect of NCO/OH molar ratio on the properties of sized papers Table 2 shows the sized papers have good water resistance.
Online since: June 2012
Authors: Bing Quan Wen, Xia Xie, Bin Wang
Scrapped number by theoretical calculation could exceed 4 million, and that number will increase every year.
Finally it will obtain the closed grain and polished coating.
Online since: May 2011
Authors: Shi Bao Luo
This method is mainly for wooden parts produced the arrange grain cracking damaged, the cracking of component is mainly due to the wet to dry state.
The approach is to use number 8 galvanized iron wire at the wood components cracks.
Currently a large number of ancient buildings is needed of reinforcement maintenance, professional and technical personnel to fill the existing severe shortage of professional and technical staff need training.
Online since: May 2011
Authors: Yu Shen, Hai Dong Zhang, Xu Xu Zheng, Xian Ming Zhang, Jin Song Guo, You Peng Chen
However, a large number of raw materials with rich sources and low prices cannot be regarded as feedstock for the production of fuel ethanol, such as xylose as one of the main components in lignocellulose, and lactose in whey powder which is a by-product in dairy industry.
To develop and utilize a large number of agricultural by-products such as straws and husks and forestry wastes as feed stock of fuel ethanol each year can not only reduce the production costs, but more importantly broaden the sources of raw materials and reduce grains/sugar consumption.
Online since: November 2012
Authors: Yan Chen Du, Ming Ming Zhang
In this paper, the experimental study for IDFPDA is to study the effect on vibration attenuation of IDFPDA, by changing the diameter and the number of impactors, and the particle materials.
In order to compare easily, the number of different diameter impactors above were 1, 8, 64 and 1000 with the equivalent mass.
Found that the inner diameter of damper was 12mm, and after added 10mm diameter steel ball, the clearances became 2mm same as the diameter of quartz grain.
Online since: November 2012
Authors: Xu Ming Long, Xiao Lu Cui, Hao Huang, Mei Jun Xie, Xu Peng, Hao Yan Xia
Corrosion target separation algorithm can be glued together, and small grain noise removal, the expansion of the neighborhood average algorithm. the basic operations was defined as
To find out the differences in the number of images, its each comparison is more complicated.
By treatment of processing of the image difference operator (This article refers to the pixel operations), the results obtained will be able to reflect the differences in a number of images exist, and then through the actual use of artificial conditions, boundaries, ultimately can get the image welding point defects.
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