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Online since: September 2013
Authors: Ezio Giuriani, Giovanni Metelli, Egidio Marchina
This technique makes it possible to distinguish between different degrees of decay as a function of the number of blows necessary for 1 cm penetration.
The assessment is possible by means of correlation curves between the number of blows and the wooden strength according to the wood essay, moisture content and the penetration direction with respect of the grain direction [21].
With regard to the damaged beam of the wooden floor in Palazzo Calini (Brescia), several tests were performed up to a penetration depth of 40 mm with a blow number for 1 cm of penetration varying between 6 and 12.
Small larch specimens, loaded in the direction parallel to the grain, showed an important plastic behaviour of sapwood with a ultimate shear strain gu varying from the value of 26.4 10-3 to 35.0 10-3, as depicted in Fig. 5.a.
Larch specimens loaded parallel to the grain fibres exhibit a non-linear shear behaviour with a good ductility factor that can reached a value close to 5.
Online since: December 2011
Authors: Yong Yang, Jian Guang Wang, Liao Yuan Zhang, Chao Wang
The number of diamond particles that involved in cutting workpiece gradually increase, so the force between wire saw and the workpiece is increasing.
That is because after the first phase, the effective area of cutting is stable and the number of involved diamond particles is stable.
That is because comparing the first stage, the coolant cannot reach the machined region in time and machined chip cannot be ruled out in time, so there is a mount of chip particles that involved cutting process, which lead to the total number of cutting particles increased and the force between wire saw and workpiece increased compared with the first stage.
Second, such as the above analysis, in the cutting process, the number of abrasive particles per unit area , the proportion of abrasive particles Participated cutting ,Wire radius ,etc ,have some changes in their own.
Furthermore, the silicon atoms of polysilicon arranged into many crystal nucleus in the diamond lattice, and these nucleus grow into grains of different crystal orientation.
Online since: September 2020
Authors: Mohamad Hasmaliza, Husniyah Aliyah Lutpi, Tuti Katrina Abdullah
The microstructure of the sintered samples was observed under SEM and the particles were displayed an evidently growth of the grain as function to the soaking time.
This indicates the improvement of particle growth in S5 is solely due to enough time for the particles lowering the surface energy and develop interaction within the particles, forming the grain growth of particles necking then diffusion happened.
According to Feng et al. [1], structural bonding appeared at the region of 800 – 1250 cm-1 was the stretching vibrations of SiO4 with different number of oxygen atoms.
Online since: March 2013
Authors: Yan Qiu, Yi Hong Liu, Yi Wang Bao, Hui Juan Chen, Yong Wang
The cycling number was from 50-300.
The cycling number was from 50-300.
In highly brittle materials like glasses or fine-grain polycrystalline ceramics, inner-cone cracks could appear before radial cracks.
Fig. 5 showed the relationship of the residual strength of the porcelain disc and the fatigue load value and cycle numbers.
Online since: June 2016
Authors: Suryana Suryana, Muhammad Fitrullah, Febri Firmansyah, Abdul Aziz
This research obtained the increase of hardness value and the number of pearlite and ferrite.
Sandpaper the sample surface with sandpaper size number 80, 120, 240, 400, 600, 1000, 1200 and 1500 (from coarse to fine).
The number of pearlite can be seen clearly in the austenite area which is at the phase (α + γ) with holding time as well as quenching and tempering treatment increases the pearlite volume.
The increase of hardness value occurred because the increase of pearlite volume fraction, this happened due to the austenite crystals are too large, so the rapid cooling pearlite will form parallel pearlite plate structure, which growns in coarse austenite crystal grains that will lower ductility/toughness of the steel.
Online since: May 2011
Authors: Jin Tao Wu, Yu Qiang Dai, Ze Wu Wang, Feng Xia Liu
The key factors effecting on Qeff include: the number of particles contacting with heating surface, the contact time, and the contact area.
Introduction Granular materials are widely used in the chemical industry with particulate engineering, design of powders, storage of grain flows, separation and granulation.
The number of particles contacted with the heating surface is the major factor affecting heat transfer.
Fig. 8 (a) shows the relationship between the number of particles contacted with the heating surface per unit time Np and vp when particle size follows random distribution.
The key factors effecting on Qeff include: the number of particles contacting with heating wall, the contact time, and the contact area.
Online since: May 2012
Authors: Yong Bin Lai, Xiu Chen, Wu Jie Ge, Cui Ying Lu
Soybean oil was provided by Dantu grain and oil chemical plant, China. -10PD was obtained from China Petroleum & Chemical Corporation.
Table 1 Main composition (wt.%) of SME a SME Content SME Content C14:0 0.19 C16:1 0.26 C16:0 11.09 C18:1 28.56 C18:0 5.50 C20:1 0.41 C20:0 0.60 C22:1 0.11 C22:0 0.69 C18:2 42.95 C24:0 0.22 C18:3 7.74 aCm:n: shorthand of fatty acid methyl ester. m: the number of carbon atom in fatty acid group. n: the number of double bond.
To organic compounds with similar composition and structure, substance volatility got poor with increasing the molecule mass (the number of carbon) and molecule 3D-structure.
It was chiefly because -10PD was mainly composed of alkane of 8-26 C atoms, and SME was mainly composed of FAME of 14–24 even-numbered C atoms.
Xie: Effect of Fuel Volatility and Cetane number on Emission of Diesel Engine, Jilin University, Jilin (2006) (In Chinese) [6] D.
Online since: January 2013
Authors: Norani Muti Mohamed, Siti Nur Azella Zaine
X-ray diffraction (XRD) technique was used to evaluate the crystallographic structure and crystallite size (grain size) of the samples using a Ni-filtered Cu Kα radiation (λ= 1.54 Å).
(a) (b) (c) (d) (c) Fig.1 SEM image (100K magnification) of synthesized TiO2 aggregates calcined at (a) 400°C (b) 500°C (c) 600°C and (d) 700°C The increase in crystallite size with increasing calcination temperature implies that higher thermal energy can promote the grain growth causing the crystallite to become larger.
The short-circuit current was found [17] to be the result of the initial number of photogenerated carriers, electron injection efficiency from dye to photoelectrode materials as well as the rate of recombination between the injected electrons and redox couple electrolyte system.
Thus, the initial number of photogenerated carriers was significantly influenced by the light harvesting efficiency introduced by the aggregate structures.
Online since: February 2013
Authors: Yi Ming Cai
He planted a large number of smartweed in some lands polluted by zinc, lead, cadmium and other metals.
To popularize this research result, the group even set up a commercial company and it has received a large number of orders from all parts of Germany, especially environment protection organization.
They are classified as “grain crops”, “cash crop”, etc.
Grain crops mainly include rice, wheat, corn, bean, potato, broad bean and so on; cash crops mainly include oilseed, flax, sunflower, etc; vegetable crops mainly include green vegetables, turnip, celery, leek, carrot, day-lily, chili, tomato and so on.
Online since: July 2014
Authors: Aleksey V. Ulybin, Alexander V. Puzanov
Grain fillers are mainly inert.
It goes against the necessity to increase the distances to reduce current heterogeneity because of grain fillers.
Therefore, to increase the number of controlled sections, non-destructive testing methods were selected as part of the evaluation, and provided additional information on the condition of the roof structure.
Application of the method has helped to reduce the number of sections with construction integrity, and to secure a large amount of controlled zones.
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