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Online since: August 2018
Authors: Vladimír Pavlík, Juraj Bisaha
The maximum size of EP grains was up to about 2 mm.
The cllular character of the EP grains was thus totally destroyed.
One half of the total number of samples were then stored in the ambient laboratory conditions at about RH 45%.
Surface of the EP grains seemed to be damaged or broken.
It suggested that the glassy cell walls of the EP grains (Fig. 1) were almost impermeable to water and kept the air inside the grains.
Online since: May 2014
Authors: Nian Li, Qing Xi Peng, Li Yin, Li Ping Wang
With development of Internet, an increasing number of user-generated-contents provide valuable information to the public.
The number of posts increases rapidly, which make people hardly annotate it manually.
Obviously, the Microblog news analysis in previous works is course-grained studies.
While our problem is a fine-grained solution to resolve the news features in Microblog, probabilistic graph model can’t finish our task. 3 Models and Methodology 3.1 News Model In this section, we focus on the formulation of news model.
Table 1 Comparison of accuracy in different method KNN Naïve Bayes SVM Co-Traning Twitter 0.71 0.70 0.74 0.76 Tencent Microblog 0.62 0.60 0.71 0.74 Sina Microblog 0.67 0.64 0.68 0.72 The Co-Training methods take advantage of small number of labeled examples, and achieve higher accuracy.
Online since: November 2011
Authors: Deepak Bhandari, Rahul Chhibber, Navneet Arora
The choice of welding electrode coatings for SMAW depends on a number of factors, including the weld material, welding position and the desired weld properties.
There are some regions where grain boundary ferrite is also present.
Ferritic HAZ microstructures were taken from fine grain region and are shown in fig.4, 5 and 6.
Ferritic HAZ microstructure obtained with E-1 electrode depicts ferrite grains with finely distributed pearlite all around.
The ferrite grains are usually fine and the structure mainly comprises of ferrite, pearlite and carbide.
Online since: November 2012
Authors: Irina Hussainova, Arkadi Žikin, Lauri Kollo, Der Liang Yung
Introduction The potential applications for zirconium carbide (ZrC) span a wide number of needs arising from future military aerospace, industry, energy, and space-based projects.
The overall microstructure consisted of rounded ZrC grains in a nearly continuous matrix made of Mo and Mo2C.
We compared two separate sources of ZrC: ZrC(CP), which is a commercially purchased nanopowder carbide (~100nm grain size, 99% purity, China) and ZrC(TUT), which is an in-lab synthesised powder [5].
In a previous study, ZrC particles reinforced with tungsten grains created a Zener drag force on the migration of grain boundaries [10].
Likewise, the titanium carbide particles can give strong restriction of grain-interior deformation and therefore result in greater structural strength for the composite.
Online since: July 2008
Authors: Laurent Langlois, Eric Becker, Véronique Favier, Régis Bigot, Jean Christophe Pierret, Pierre Cezard
Parameters affecting the forming process A number of tests have been done on C38 steel, the results show that the forming speed, the slug temperature and the die temperature have a major influence on the flow type of steel and the load.
HV=237 Ferrite (light) at prior austenite grain boundaries and plates within grains in a matrix of pearlite (grey) ([11] fig. 19 page 213) HV=255 13 Middle from convergence cone Surface shows decarburization.
The light areas near bottom of micrograph are ferrite; the matrix is pearlite (grey) ([11] fig. 18 page 213) HV=173 Ferrite (light) at prior austenite grain boundaries and plates within grains in a matrix of pearlite (grey ([11] fig. 19 page 213) HV=201 14 End from convergence cone Surface shows clearly decarburization.
Ferrite at grain boundaries and as plates in pearlite grains([11] fig. 17 page 213) HV=184 19 Middle from 40 mm diameter cylinder Ferrite (light) within in a matrix of pearlite (grey) ([11] fig. 20 page 213) Ferrite (light) within in a matrix of pearlite (grey) ([11] fig. 20 page 213) Impact of thermal exchanges on local mechanical properties 1.
Point 19, at the heart of the sample, has an important grain size, independent from the tool temperature.
Online since: July 2012
Authors: Kui Peng
We surveyed each plot of the main arable lands on type, number, area, cropping, harvest, fertilizer and crop residue utility.
On the other hand, N and P input increases in large-scale irrigated land in 2002 were caused mainly by a large number of chemical fertilizer inputs.
The nutrient deficits of vegetable land was because that vegetable has usually higher yield than those of common grain crops, and has very little residue to return back to field.
Owing to smaller patch sizes of this kind of arable lands, farmers usually plant both grain crop and vegetable simultaneously, so that harvest more yields than those from common grain crop land, which resulted in C and N deficits.
However, since the residue of grain crops can be returned back to the field, P in this kind of lwhoand can accumulate and get surplus finally.
Online since: September 2014
Authors: Fang Hong Sun, Su Lin Chen, Bin Shen
According to available literatures, the surface roughness of a well-grained poly- crystalline diamond film can be reduced to some extent by depositing a layer of 0.3-μm-thick ta-C film; meanwhile, its wear resistance is also enhanced.
At the beginning, the mechanical interactions between peaks of two contacted surfaces causes high and unstable COFs as well as a large number of fractured particles.
With 300 rpm and 2 N, its worn surface is covered by large pieces of wear debris, and a large number of free debris and particles are trapped in the grain boundary area.
The shape of diamond grains remain fairly well, suggesting no significant polishing effect occurs.
The DLC film covered on the sharp edge of some large diamond grains has been worn out and the underneath diamond grain is polished as plateau area (black area in the image).
Online since: April 2023
Authors: L.A. Degtyar, I.Y. Zhukova, K.V. Ovchinnikova
The study of CEC morphology, microstructural parameters, such as grain size, density, porosity, microstrains, etc., made it possible to determine the effect of nanoadditives on the properties of coatings [12-14].
Analysis of the coating grains showed that the process of their formation is of the same nature.
In the initial phase of sediment formation, an increase in the number of grains is observed, then, as the coating thickness increases, this process gradually decreases.
The largest number of grains (86) is observed for the Ni-Co-ND coating, while the values of the radius of the equivalent grain disk turned out to be minimal (42 nm); this fact indicates the finest crystalline structure of the Ni-Co-ND deposit.
Online since: May 2013
Authors: M. Ashraf Imam, Ralph W. Bruce, Jerry Feng, Arne W. Fliflet
Tailoring the properties of magnesium by forming new alloys or new structures has been the focus for a number of investigations [1–4].
In addition, the significantly reduced sintering time at temperature implies limited grain growth, much improved productivity, and energy consumption efficiency.
Limited grain growth offers mechanical property advantages related to the finer grain size of parts made from powders [20].
Microstructure of Fig. 6a indicates the possibility of titanium at the grain boundary but may be below the detection limit as seen in Figure 6b.
They also show higher O content at the Mg grain boundary.
Online since: July 2015
Authors: Gusti Made Oka, Andreas Triwiyono, A. Awaludin, S. Siswosukarto
The bamboo embedment strength is affected by specific gravity, moisture content, bamboo grain direction and bolt diameter [7].
The average value of bamboo embedment strength on height position at bottom, middle and top was used to estimate the bamboo embedment strength in direction of parallel to grain.
The node and internodes of bamboo are affected of bamboo connection strength, because bamboo grain on node is return partly.
Application of European Yield Model (EYM) on connection laterally resistance analysis can be used in counting the number of shear connector on beam, column, joint and truss.
Factors affected of connection strength are connection geometric shape such bamboo wall thickness, bolt diameters, bamboo component number and specific gravity.
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