Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: November 2018
Authors: Salima Aggoun, F. Mostefa, H.A. Mesbah, D. Mekhatria, Nasr Eddine Bouhamou
Introduction
Many studies have shown that a large number of natural aluminosilicate materials can potentially be used for the synthesis of geopolymers such as kaolinite, stilbite, sodalite, illite, and anorthite [1, 2, 3].
The entire test and the grain size analysis was carried at out laboratory INSA Rennes.
Fig. 2: Volumetric particle size distribution Fig. 3: Grain size distribution of raw and calcined sediment In addition the granular distribution seems to be transformed into a unimodal distribution centered 5 μm.
Mullainathan : Distribution and characterization of minerals in Cauvery river sediments by grain size analysis: a new approach by FT-IR study, Ind.
The entire test and the grain size analysis was carried at out laboratory INSA Rennes.
Fig. 2: Volumetric particle size distribution Fig. 3: Grain size distribution of raw and calcined sediment In addition the granular distribution seems to be transformed into a unimodal distribution centered 5 μm.
Mullainathan : Distribution and characterization of minerals in Cauvery river sediments by grain size analysis: a new approach by FT-IR study, Ind.
Online since: July 2025
Authors: Peter Mascher, James Michael Gaudet, Tiancheng Wu, Daniel Lopez Vilchis, Amy Stieh, Janos Rado, Alla Reznik, Andrew P. Knights
Note that, while reference [2] shows the polycrystalline grain structure to be composed of thin platelets, the platelets are all oriented with their broad surfaces perpendicular to the positron beam, thus to the positron beam the samples may appear to be composed of much larger grains.
Note that the regions are named according to the convention described in the methods section, rather than the VEPFIT convention of numbering them from the surface.
Further studies on this material must begin to distinguish between disorder on the scale of individual atoms and bond lengths (i.e. vacancies and vacancy complexes), and that on the larger scales defined by the layered structure, crystalline grain structure, inclusions of impurities (Pb, PbO2, Pb3O4, etc.), and amorphous/crystalline inclusions.
Note that the regions are named according to the convention described in the methods section, rather than the VEPFIT convention of numbering them from the surface.
Further studies on this material must begin to distinguish between disorder on the scale of individual atoms and bond lengths (i.e. vacancies and vacancy complexes), and that on the larger scales defined by the layered structure, crystalline grain structure, inclusions of impurities (Pb, PbO2, Pb3O4, etc.), and amorphous/crystalline inclusions.
Online since: May 2008
Authors: Berthold Krevet, Manfred Kohl
A device made of SMA consists of an extremely large number of grains.
In turn, each grain contains a complex microstructure of austenite and different variants of the martensite.
One solution method is the use of a representative volume element (RVE), which is built up of a sufficiently large number of grains consisting of a single phase.
Such a deformation will occur, if the number of lattice elements, which are in the M+ and M- state, are different.
The number of lattice elements of the individual variants divided by the number of lattice elements of the total specimen, x- and x+ , can be interpreted as the relative phase fractions of the M- and M+ variants.
In turn, each grain contains a complex microstructure of austenite and different variants of the martensite.
One solution method is the use of a representative volume element (RVE), which is built up of a sufficiently large number of grains consisting of a single phase.
Such a deformation will occur, if the number of lattice elements, which are in the M+ and M- state, are different.
The number of lattice elements of the individual variants divided by the number of lattice elements of the total specimen, x- and x+ , can be interpreted as the relative phase fractions of the M- and M+ variants.
Online since: February 2014
Authors: You Qiao Zhao, Song Feng Lu, Yong Kang Xu
If the index already include this word segmentation, then the method is to use exist index pointer pointing to a data field which includes this word segmentation’s document number and address.
The basic principles of the above key management is use a small number of keys to protect the large number of keys, except for master key, the other keys are dynamically generated.
When a user can access a specific function, and in this specific function fine-grained access control can be continued.
The following properties are tested: 1) the changes of system performance parameters when the length of a single file changes, 2) the comparison between changes of system performance when the number file with fixed-length changes. 3) The comparison between the time distribution of system performances when the type and length of the document changes. 4) The changes of the number of documents returned by the system and the query time when the number of the querying keywords change and the file size is fixed. 5) The changes of the number of files returned by the system and query time when the size of the index file changes with the keyword infixed. 6) The changes of the recall rate and precision rate, when the number of index documents changes.
Test results show that the test system performance does not vary much with number of files and file sizes, but the compression and encryption of original files increase linearly with the file size and the number of files.
The basic principles of the above key management is use a small number of keys to protect the large number of keys, except for master key, the other keys are dynamically generated.
When a user can access a specific function, and in this specific function fine-grained access control can be continued.
The following properties are tested: 1) the changes of system performance parameters when the length of a single file changes, 2) the comparison between changes of system performance when the number file with fixed-length changes. 3) The comparison between the time distribution of system performances when the type and length of the document changes. 4) The changes of the number of documents returned by the system and the query time when the number of the querying keywords change and the file size is fixed. 5) The changes of the number of files returned by the system and query time when the size of the index file changes with the keyword infixed. 6) The changes of the recall rate and precision rate, when the number of index documents changes.
Test results show that the test system performance does not vary much with number of files and file sizes, but the compression and encryption of original files increase linearly with the file size and the number of files.
Online since: January 2017
Authors: Ke Jian, Liang Li, Yi Fei Wang
Experimental results indicated that oxygen content, grain size of SiO2 and oxide layer thickness increased, whereas the tensile strength decreased with rising the heat treatment time.
After oxidizing for 100h, a large number of cracks have formed on the surface, which also originated from the interface.
After oxidizing for 100h, a large number of cracks have formed on the surface, which also originated from the interface.
Online since: January 2012
Authors: Bellambettu Chandrasekhara Pai, Uma Thanu Subramonia Pillai, Kumaraswamy Kaliamma Ajith Kumar, Madhusudan Chakraborty
Mg-Mg2Si in-situ composites by the addition of Si in Mg have become more attractive since the Mg2Si phase impedes the grain boundary sliding at elevated temperature because of its inherent properties which greatly improve the heat and wear resistances.
As the normal load increases, Mg2Si particles at the surface introduce more number of subsurface crack into the system.
As the normal load increases, Mg2Si particles at the surface introduce more number of subsurface crack into the system.
Online since: May 2024
Authors: Muhammed Naziruddin Khan, Abdullah Almohammedi
The influence of the number of laser pulses on the photovoltaic properties of a ZnO thin film was observed [39].
The thin film was applied without a focusing lens, with all other parameters held constant except for the number of laser pulses.
The irradiation time (number of pulses) of the laser source on the nanostructured ZnO film was varied.
The IR intensity of the nanostructured ZnO thin film is overall affected by laser irradiation times (number of pulses).
Tian, Grain Size Control and Gas Sensing Properties of ZnO Gas Sensor, Sensors and Actuators B: Chemical, 66 (2007) 277
The thin film was applied without a focusing lens, with all other parameters held constant except for the number of laser pulses.
The irradiation time (number of pulses) of the laser source on the nanostructured ZnO film was varied.
The IR intensity of the nanostructured ZnO thin film is overall affected by laser irradiation times (number of pulses).
Tian, Grain Size Control and Gas Sensing Properties of ZnO Gas Sensor, Sensors and Actuators B: Chemical, 66 (2007) 277
Online since: April 2015
Authors: Kinga Rodak, Andrzej Kiełbus, Bogusława Adamczyk-Cieślak, Jaroslaw Mizera, Iwona Bednarczyk, Bartłomiej Dybowski
What is more, number of fine precipitates were found within the α-Al dendrites.
The microsections were grinded and polished, with finishing polishing done on SiC suspension with grain size equal to 0.25μm.
The microsections were grinded and polished, with finishing polishing done on SiC suspension with grain size equal to 0.25μm.
Online since: June 2008
Authors: Kazuaki Shiozawa, L. Lu
Subsurface crack initiation is
dominant at low stress amplitudes and high
numbers of cycles, whereas surface fatigue crack
initiation occurs at high stress amplitudes and low cycles.
Another S-N curve appears at high number of cycles and was governed by an internal crack initiation and growth as indicated by the dashed line.
It can be seen from the photographs that many spherical carbide particles are distributed in the matrix which is a tempered martensite structure composing of an average prior- austenitic grain size of 5.7µm.
The other S-N curve appears at a high number of cycles and is governed by internal crack initiation and growth.
Number of cycles to form the GBF area, ∆N, is affected by the difference between ∆Kth,i and ∆K of the inclusion, ∆(∆K), as shown C'-C" or D'-D" in Fig. 8.
Another S-N curve appears at high number of cycles and was governed by an internal crack initiation and growth as indicated by the dashed line.
It can be seen from the photographs that many spherical carbide particles are distributed in the matrix which is a tempered martensite structure composing of an average prior- austenitic grain size of 5.7µm.
The other S-N curve appears at a high number of cycles and is governed by internal crack initiation and growth.
Number of cycles to form the GBF area, ∆N, is affected by the difference between ∆Kth,i and ∆K of the inclusion, ∆(∆K), as shown C'-C" or D'-D" in Fig. 8.
Online since: October 2011
Authors: Zhi Min Li, Hong Bin Zhao, Yu Wen Na
In recent years, with the rapid development and expansion of city, many villages have been gradually incorporated into city zone and as a result villages in urban district, normally called in-city villages, come into being, which are sarcastically against the grain with all aspects of city zone.
For example, the number of three-storied brick houses increased to 2 times and five-storied brick houses began to come out.
For example, the number of three-storied brick houses increased to 2 times and five-storied brick houses began to come out.