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Online since: December 2016
Authors: Balázs Nagy, Emese Paulik
Standard and Literature Review When it comes to building physical and energetic calculations, large number of experts still using withdrawn Hungarian standards, e.g.
According to the reduced aspect ratio, the maximum ratio of the additive grain size of the designed concrete is the halved (dmax,original = 16 mm, while dmax,reduced = 8 mm).
In Table 2, after the RC sign, the first number refers to the number of steel rebars in specimens, the second number is refers to the diameter of the rebars in mm.
Online since: October 2011
Authors: Zhi Sun, Wen Jing Bao, Zheng Yuan, Quan Chao Zhuang, Yong Li Cui
Compared to the LiMn2O4 and LiNi0.4Mn1.6O4 powders, the LiNi0.5Mn1.5O4 powder is homogeneous without agglomerated particles, what′s more, fine grain with about 50 nm size dispersed between large particles with uniform size distribution, which will enhance the electrochemical performance by decreasing lithium ion diffusion length and increasing effective surface area contact with electrolyte.
Fig.4 Charge-discharge curves of Li/LiNixMn2-xO4 (x=0~0.4) cells at 0.1 C rate Fig. 5 shows the variations in the discharge capacity of spinel LiNixMn2-xO4 (x=0-0.4) with cycle numbers.
Fig. 5 The variations in the discharge capacity of spinel LiNixMn2-xO4 (x=0~0.4) with cycle number at 0.1 C rate The electrochemical characterization of spinel LiNi0.5Mn1.5O4 at 4.7 V high potential Fig. 6 shows the charge-discharge profiles of LiMn1.5Ni0.5O4 cathode sample for the initial cycle at 0.1C rate between 3.3 V- 5.0 V.
So the discharge capacity and charge/discharge efficiency of LiNi0.5Mn1.5O4 sample are given as a function of cycle number at different rate in Fig. 8.
Therefore LiNi0.5Mn1.5O4 electrode material showed good cycling performance and rate capacity Fig. 7 Cyclic voltammogram of the first three cycles for the LiMn1.5Ni0.5O4 at a scan rate of 1 mVs-1 in the potential ranging from 3.3 V to 5.0 V Fig. 8 Variation of discharge capacity and charge/discharge efficiency of LiMn1.5Ni0.5O4 with cycle numbers at different rate Conclusions Spinel LiNixMn2-xO4 (x=0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5) compounds with a spinel crystal structure were successfully synthesized by sol-gel method and the following conclusions were obtained: (1)As Mn was replaced by Ni, the initial capacity of compounds decreased, but their cycling performance were enhanced.
Online since: October 2010
Authors: Wan Guang Ge, Jing Lin, Jian Shu Ye, Ying Ma
A specimen 500 mm long is twisted and the number of rotations is counted until it breaks.
The result shows that NC (cycle number to failure) of specimens clearly decreases with increasing the stress amplitude under any corrosion fatigue conditions, and the depression correlates with f, R and environmental media.
Plentiful intracrystalline dislocations of cold-drawn steel wires make its lattice seriously distort, therefore the crack growth in the grains becomes more difficult.
The presence of the dimples can reduce the fatigue crack growth rate and increase fatigue endurance with more cycle numbers to failure.
The cycle number to failure of pre-split steel wires was decreased with the increase of stress amplitude.
Online since: January 2007
Authors: Takeshi Tanaka
This is because the binding force among the clusters decreased with an increase in the number of abrasive grit particles.
However, though the pre-polishing grooves diminished after 10 and 15min under 1.0kV/mm, many pre-polishing grooves remained on the workpiece in the absence of voltage. 0 1.0 2.0 0.2 0.4 0.6 0.8 Voltage ��kV/mm Surface roughness Rz ��m Polishing pads : Shower curtain : Toraysee 10�m10�m10�m10�m 10�m10�m10�m10�m 10�m10�m10�m10�m 1.5 0.5 Grain density:10wt% Solution:ER fluid for polishing Abrasive grits:WA#2000 Workpiece:Cu Polishing time:10min Fig.11 Influences of kinds of pad on surface roughness Fig.12 Influences of kinds of abrasive grit on surface roughness 0 5 10 15 0 1 2 3 Polishing times min Surface roughness Rz ��m Voltage : 1kV/mm : 0kV/mm 10�m10�m10�m10�m 10�m10�m10�m10�m 10�m10�m10�m10�m 10�m10�m10�m10�m 10�m10�m10�m10�m 10�m10�m10�m10�m 10�m10�m10�m10�m Grit density:10wt% Solution:ER fluid for polishing Abrasive grits:WA#2000 Workpiece:Cu Pad:Traysee Conclusions The following conclusions were
Online since: January 2010
Authors: Andrew A. Howe
Each of the phases has a nucleation rate and a growth rate, which determines the number of grains that form and their size, from which the volume fraction can then be calculated.
Online since: October 2010
Authors: Hiroaki Anno, Takahiro Nakabayashi, Masahiro Hokazono
Ba ingot (3N), Sr (3N) ingot, Eu ingot (3N), Ga shots (5N), and Si grains (5N) were used as starting materials.
The lattice thermal conductivity kL was estimated by subtracting the electronic thermal conductivity ke from k. ke was estimated by the Wiedemann-Franz relation ke=LTs, where L is the Lorenz number (2.4410-8 V2/K2).
Online since: October 2013
Authors: Dragos Ronald Rugescu, Radu D. Rugescu, Radu Sapunaru
At least the following steps are involved in defining the main set of constraints: -establishing the number and the hierarchy levels of the constraints; -ordering constraints that are otherwise implicit in the original factorial polynomial and are not represented in this function, but are provided as an a-priori knowledge; -defining the margins and range extent for the variation of the constraints, if applicable.
E., and Foster W., A review of Analytical Methods for Solid Rocket Motor Grain Analysis, 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 20-23 July, 2003, Huntsville, AL
Online since: December 2010
Authors: Qiang Chen, Wei Tao Chen, Guo Wei Meng
Time(min) The disintegration percent (%) Fig.3 Relation curve of disintegration content and time Table 1 Basic property and description of samples Specimen numbers Sampling mileage Natural water content(%) Grain composition percentage(%) Notes >2(mm) 0.5~2(mm) 0.25~0.5(mm) 0.075~0.25(mm) <0.075 (mm) A1-1 YK12+415 44.71 5.2 30.5 21.0 32.3 11.0 Residual silty clay: grey Hard plastic, homogeneous soil.
Online since: December 2010
Authors: Wen Bin Wu, Yong Xiang Li, Dong Xia Wang
But the properties and varieties of the diamond and CBN and Tic(N)-based hard alloy(metal ceramic), of coating tools and ultra-fine grain hard-alloy cutting tool, were a lot inferior to those in many other countries.
Since the later 1980s, China imported a number of advanced automatic production lines of cars from Germany, America, France and Japan etc, in which HSC was extensively employed.
Online since: December 2012
Authors: Srimala Sreekantan, Chin Wei Lai
This observation suggested that WO3 species are precipitated at the TiO2 grain boundaries still in an amorphous phase after post-treatment at 400°C in argon atmosphere [26-27].
Thus, the number of photo-induced electrons generated will significantly reduce and cause the lower photocurrent generation [35-37].
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