Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: January 2012
Authors: Yu Fei Wang, Lin Guo, Jing Jing Li, Guang Ying Gao
The initiator (0.2 ~ 0.8% of the total monomer) was relatively appropriate, because it could make the product be prepared blue present, small grain size and good emulsion stability.
If the monomer dropping speed too fast, the monomer increased in short time can make reaction system temperature rise, reduce the activation energy of initiator, produce more number of free radicals, reaction intensify reaction, result in “explosive polymerization”.
Unstable dropping speed of initiator can lead to different free radicals number generated in different polymerization stages, and not consistent polymerization rate, resulting to the difficult of controlling reaction temperature.
Online since: June 2018
Authors: Karel Dvořák, Jana Stachová, Dušan Dolák, Dorothea Sklenářová
Crystallite can be considered a number of cells with crystalline structure that are systematically linked and are creating coherently diffracting domain.
β=B2-b2 (2) β… Full peak width at half maximum height after correction [rad] b… error of peaks due to imperfections of the device [rad] Scherrer equation after modification: L=K∙λcosθ∙1B2-b2 (3) Scherrer constant K is shape factor and takes values according to the shape of the grains.
LO1408 "AdMaS UP - Advanced Materials, Structures and Technologies", supported by the Ministry of Education, Youth and Sports under "National Sustainability Programme I" and by project No. 15-08755S: "Study of the effects of samples preparation on the final properties of inorganic binders" and project number FAST-J-17-4604 “Monitoring the properties of the limestone during thermal loading by DKTA, DSC and XRD-HT methods”.
Online since: November 2015
Authors: Razvan Păcurar, Ancuţa Păcurar
As regarding the mesh of the 3D model generated by the Femap NX Nastran program (see Figure 3b), this has been constructed as having a total number of 177.686 nodes and 142.076 finite elements.
As one may observe in these graphics, in all three cases a total number of 14 iterations were necessary to be done in order to perform the optimization.
Zavacka, Effect of drawing tubes without interoperation recrystallization annealing on the orientation of boundaries grain – longitudinal direction, Applied Mechanics and Materials 421 (2013) 329-333 [8] Z.
Online since: August 2011
Authors: Lei Zhang, Ri Gao
The grain size of quartz sand is divided into three: Coarse (1.0~0.63mm), Middle size (0.63~0.315mm) Fine particle size(0.315~0.16 mm).
Table 5 Amount and percentages of the two distribution forms of steel fiber within 5mm from the bottom Orthogonal Oblique crossing Total number A1 252 (82.4%) 54 (17.6%) 306 A2 142 (63.4%) 82 (36.6%) 224 A3 104 (55.9%) 82 (44.1%) 186 A4 327 (78.0%) 92 (22.0%) 419 In Table 5, Orthogonal means the steel fiber and crack are essentially vertical and Oblique crossing means the angle is not more than 45 degrees.
Table 6 Amount and percentages of the two failure modes of steel fiber within 5mm from the bottom Pulled out from concrete Snapped Total number A1 294(96.1%) 12(3.9%) 306 A2 215(96.0%) 9(4.0%) 224 A3 173(93.0%) 13(7.0%) 186 A4 401(95.7%) 18(4.3%) 419 Conclusions and recommendations Through the above analysis of simply supported RPC plate experimental data, the conclusions can be drawn as follows: 1) Assuming that the tensile stress of the cracking section bottom is uniformly distributed along the width direction, the average stress calculated by the bending theory of elastic thin plates before cracking is close to the one obtained from the measured result.
Online since: December 2009
Authors: Rattikorn Yimnirun, Sukrit Sucharitakul, Yongyut Laosiritaworn
Historically, a number of models, e.g. grain boundary model [4, 5, 6], domainwall pinning model [7], and volume effect model [8], have been proposed to explain the origin of aging.
As for exponents of frequency, there are both positive and negative numbers.
Online since: March 2016
Authors: Yang Gao, Shi Feng Shi, Yong Ji Niu, Jian Jun Tian, Chao Wang, Zhi Wei Zhang, Ning An
A large number of γ'phase in a very short time precipitate rapidly from the matrix during cooling, the second γ'phase with lager size is precipitated at high temperatures, and with smaller size, γ'phase is precipitated at lower temperatures Fig. 1 DZ417G directional solidification phase morphology.
The main precipitates carbide is MC and M6C carbide, and a small amount of M23C6 carbides, thus preventing the grain boundary sliding and improving high-temperature creep strength of the alloy.
Ren, A dramatic increase in dendrite number for directionally solidified superalloy DZ417G with a strong static magnetic field, Mater.
Online since: August 2016
Authors: Marvin U. Herrera, Dustin Loren Almanza, Alenn Prodigalidad, Maria Carmela Garcia
The pellets were then heat treated at 100°C for 30 minutes so that the grains would fuse together to form junctions.
Fig. 1. indicates that the highest percent degradation occurs at 50:50 ZnO-CuO volume fraction, where the sample is expected to have the most number of ZnO-CuO interfaces.
The presence of more ZnO-CuO interfaces in the sample increases the number of sites where electron-hole pairs may form, therefore enhancing the photocatalytic reaction of the material and allows it to be triggered by visible light.
Online since: September 2013
Authors: Wei Sheng Wu, Hubert Lee, Lee Kuo Lin
Literatures Review RH is commonly known as rice hull, is the remaining waste after the rice grain plant which is made into rice.
Table 2 Every m3 RHA replacement of 20% cement can reduce the amount of CO2 and the corresponding number of Lauan Tree Items Traditional cement 20% RHA replacement W/B 0.24 0.24 Revise W/B - 0.4 RHA replacement (%) 0 20 Amount of cement (kg/m3) 667 534 Amount of RHA (kg/m3) - 133 CO2 reduction (ton/m3) - 0.113 The equivalent amount of planting lauan trees decrease in the number of CO2 emissions - 3.1 Note 1: The diameter of 50 cm per plant, height of 15 meters lauan tree can absorb about 1 year of 37 kg CO2 Note 2: Reference from the Department of Forestry, National Taiwan University Professor Song-yong Wang - Wood materials on the environmental effects of carbon dioxide sequestration [8] Conclusions and Suggestions 1.
Online since: April 2014
Authors: Guo Dong Wang, Yu Jia Liu, Shuai Hou, Jian Guo Li, Jia Dong Li, Fuan Hua, Xin Yue Wang, Zhao Dong Wang, Yong Li
After the heat treatment of air flotation oven, the aluminum strips can get good surface quality, high performance, large grain size[1].
Then the fitness function is as follows: (6) Where N is the number of individual model, Yi is the flotation height.
Other parameters such as c1, c2, vmax, tmax, wmax, wmin. 2: while inumber of generations or the required accuracy is reached, then 8: break; 9: else 10: go to step 3 11: end if 12: end while Output: giving the best optimization parameters to lssvm.
Online since: April 2018
Authors: Genene Tessema Mola, M. Maaza, Xolani G. Mbuyise, Saheed O. Oseni, Wiseman M. Dlamini, Elhadi A.A. Arbab, Patrick Tonui, Kavi Kaviyarasu
However, a number of other nano-composites are also playing a critical role in the charge transport process which lead to improved device performance and device stability.
While synthesizing the carbon nano tube (CNT) in p-type semiconducting polymers a number of possible functionalizations are possible.
Ø Enhance the crystallinity of perovskites and help achieve large grain size.
Ø Enhances in light absorption through plasmonic effects Ø Nanoparticles acts as distributes at the grain boundary, passivating the perovskite film minimizing the nonradiative recombination.
Particularly, metal nanocomposites have been employed in a number of cases which have generated significant impact on performance and stability of the solar cell devices.
Showing 23991 to 24000 of 28673 items