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Online since: June 2015
Authors: Indra Sati Hamonangan Harahap, Muhammad Rehan Hakro
The rainfall infiltration depends upon number of parameters such as soil permeability, initial moisture conditions, soil porosity and evaporation rate.
The infiltration is more in case of dry soil as compared to wet, and infiltration is more the coarse grained soil than fine grained [7].
In number of ways the earth slope weakens by rainfall.
Number of numerical studies have been conducted to investigate the rainfall-induced slope failure [15, 20-22].
Hence number of experiments were conducted to observe the mode of the failure by changing different parameters.
Online since: January 2021
Authors: Abdelouahad Chala, Shahnaz Siad, Saida Marmi, Ameur Mekkaoui
There have been a number of research works on nickel electroplating that have reported the successful preparation of composite coatings via direct current, pulsed current or reversed pulse current [19].
The titania used in this work is a commercial powder of 50 nm grain size.
The spherical shaped grain was seen on the surface of all coatings.
Ni-TiO2 nanocomposites surface obtained under lower duty cycle and high frequency were found to have smaller spherical shape grains.
At first, the embedded inert oxide particles diminish the grain size increasing the compactness of deposits.
Online since: September 2006
Authors: Karim Inal, Sophie Berveiller, Jean Philippe Mathieu, Denis Bouscaud, Olivier Diard
During its elaboration, ferritic packets grow inside former austenitic grains.
The number of crystallographic planes of the {110} and {112} families combined with the cubic symmetry of the lattice enables 24 systems.
The Representative Volume element (RVE) used for the finale calibration is composed of 1000 grains.
The strain ϕψε is computed as the average of the component on plane p, gpe on this set of grains.
This post-treatment has been performed on two computations of 1000 grains aggregates.
Online since: July 2021
Authors: Alexander Shyshkin, Alexandra Shyshkina
Fine-Grained Concrete for Repair and Restoration of Building Structures SHYSHKINA Аlexandra1,a and SHYSHKIN Alexander 2,b* 1-2National University of Kryvyi Rih, 11, Vitaly Matusevich str, Kryvyi Rih, Ukraine, 50027 aalexshishkina15@gmail.com, b5691180@gmail.com Keywords: powder, concrete, surface-active substances, strength.
In addition, modern construction requires a number of engineering problems to maintain the efficiency and functionality of existing buildings, structures, road infrastructure, which is associated with increased physical depreciation of fixed assets.
As reactive powders, used was ground riverside sand, ash removal TES, fine grained fraction of iron ore dressing waste and ground to a specific surface of 300 m2/kg blast furnace granulated slag.
Online since: December 2012
Authors: Yan Hai Wu, Fang Ni Zhang, Jia Xin Li
Introduction Currently, the main ways of detecting words in images and video are as follows: the edge-based method, the grain-based method, the area-based method, the way based on the average of multi-frame in video, the way based on study and so on[1].
First step: Through statistics of the corner numbers of every row, we can remove the pseudo-corner.
Second step: Through the statistics text area corner around the corner number, removal of false corner.
Table 1 The test data data type the number of video image(picture) Actual text number(row) news 23 45 games 7 60 natural scene 18 54 Table 2 The contrast of detection algorithm before or after improvement Data type positioning way The correct detected number/row The undetected number/row The error detected number/row The recall ratio The precision ratio News before improvement 42 3 4 94.9% 91.3% after improvement 44 1 2 97.1% 95.6% Games before improvement 51 9 6 85% 89.4% after improvement 56 4 2 93.3% 96.5% Natural scene before improvement 45 9 11 83.3% 80.3% after improvement 49 5 6 90.9% 89.1% As the result shown in table 2, this algorithm extracts a majority of text areas, especially the high precision in video text of news.
The positioning accuracy of games is lower than news, mainly due to the background complexity of games is higher than video images, the similarity of the grain information of words and background also taller than news, and the contrast between character and background's color is lower than news.
Online since: April 2005
Authors: François M. d'Heurle, Christian Rivero, Patrice Gergaud, Olivier Thomas
The sequence and kinetics of phase formation raise a number of very fundamental questions [1-2] and are still an area of intense research [3].
The two curves (figure 1) share a number of similarities.
Moreover within a single polycrystalline film, large grain-to-grain stress inhomogeneities [21] may be predicted.
The tensile stress buildup below 115°C is caused by Ni grain growth.
A model proposed by Zhang and d'Heurle describes phenomenologically this competition and describes reasonably well a number of experimental findings.
Online since: April 2005
Authors: Patrice Gergaud, Marc Gailhanou, Philippe Boivin, Pascal Fornara, Stephan Niel, Olivier Thomas, Christian Rivero
The sequence and kinetics of phase formation raise a number of very fundamental questions [1-2] and are still an area of intense research [3].
The two curves (figure 1) share a number of similarities.
Moreover within a single polycrystalline film, large grain-to-grain stress inhomogeneities [21] may be predicted.
The tensile stress buildup below 115°C is caused by Ni grain growth.
A model proposed by Zhang and d'Heurle describes phenomenologically this competition and describes reasonably well a number of experimental findings.
Online since: March 2016
Authors: Qing Tao, Jian Yang Liu, Wei Lai, Wei Wei Tang, Jian Wang, Wei Liu
The major phase of the Fe-Cr layers is dendrite with the lath carbide mixed between the limb of dendrite and the grains refine with addition of Ti.
Which is by improving the carbide morphology, improve carbide nucleation rate and refine grain to improve the mechanical properties of the material.
The growth of grain direction is no longer the direction of cooling of the cladding layer, which is completely perpendicular to the fusion line.
With the addition of Ti, there was some massive fine grain TiC phase in the cladding layer.
When the amount of Ti was 2%, the grain size of lump strengthening phase in the cladding layer was the minimum.
Online since: July 2006
Authors: Dimitrios Tsivoulas, Joseph D. Robson
Scandium additions are known to offer a number of benefits to aluminium alloy performance.
The precipitate morphology is very important since it illustrates the effect of a number of parameters.
Coherent particles will be randomly dispersed in the matrix while semi-coherent ones form preferably on dislocations and grain boundaries.
Above that, heterogeneous precipitation occurs indicated by the formation of the new nuclei on dislocations and grain boundaries.
In the intermediate region the ratio of semi-coherent to the total number of particles increases linearly with time.
Online since: October 2016
Authors: Anatoliy Matveevich Adaskin, Alexey Anatolevich Vereschaka, Anatoliy Stepanovich Vereschaka, Andre Batako, Victor Nikolaevich Butrim
This alloy is characterized by high hardness among the alloys used due to the high content of cobalt and sufficiently large size of carbide grains.
The rapid wear of tungsten-free KNT-16 hard alloy is associated with a number of reasons.
Satisfactory results were obtained with the fine-grained VK10-HOM carbide designed to machine heat-resistant alloys.
This kind of binder firmly holds carbide grains within the matrix even when they are considerable worn out in contrast to soft binder weakened during heating in which carbides grains are pulled out under the influence of cutting forces.
Figure 2: Morphology of surface layer of coating Ti-(TiAl)N-(TiCrAl)Non carbide substrate Fig. 3 illustrates a cross section of the coated insert, showing the large carbide grains with inter-grain voids.
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