Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: December 2013
Authors: Yudy Surya Irawan, Eko Marsyahyo, Rudy Soenoko, Heru Suryanto
The crystalline structure of cellulose affects the physical and mechanical properties of the cellulose fibers.
Increasing the ratio of crystalline to amorphous regions in a cellulose structure affects the accessibility of cellulose molecules increases the rigidity, dimensional stability and density of cellulose while but properties such as the elasticity chemical reactivity and swelling of polymeric substances decrease [4,5].
This process implies the subjection of a fiber to an interaction with a fairly concentrated aqueous solution of a strong base to produce swelling, with resultant changes in structure, dimensions, morphology and mechanical properties [7] and also an improvement in the interface shear stress in composite [8].
The corresponding crystalline properties values are listed in Table 1.
Crystallinity properties of the mendong fiber after different stages of alkali treatment.
Increasing the ratio of crystalline to amorphous regions in a cellulose structure affects the accessibility of cellulose molecules increases the rigidity, dimensional stability and density of cellulose while but properties such as the elasticity chemical reactivity and swelling of polymeric substances decrease [4,5].
This process implies the subjection of a fiber to an interaction with a fairly concentrated aqueous solution of a strong base to produce swelling, with resultant changes in structure, dimensions, morphology and mechanical properties [7] and also an improvement in the interface shear stress in composite [8].
The corresponding crystalline properties values are listed in Table 1.
Crystallinity properties of the mendong fiber after different stages of alkali treatment.
Online since: October 2011
Authors: Min Juan Li, Shu Ru Liu
Introduction
Commercial real estate, also known as business real estate, refers to those real estate investment goods that can generate benefits in the form of property appreciation via reasonable operation.
First, according to construction drawings and technical information on technical measures, construction procedures, work organization, mechanical equipment selection, and allocation of human resources, careful analysis and study, to optimize the construction program, the rational allocation of production factors, reasonable and feasible for the preparation of scientific responsibility to create conditions for the budget.
Meanwhile, after repeated comparisons to develop materials, mechanical unit control table, combined with on-site construction conditions were calculated for each sub-project of the responsibility of the budget.
If a lack of project cost control plans, no pre-development cost targets, how can we inspect the implementation of the target and adjust them, only to strengthen the post-control; Cost control system, is the work content of the relevant factors that affect the cost of the system to manage and regulate, and to ensure the implementation of the concept of cost control to the relevant departments, in one aspect or part is not a loophole, and will not like such a project would be left to the last question, by the Ministry of sticking to a hard budget buckle to reduce costs, especially when some of the other departments, due to strict cost impact, such as the content is not enough to confirm the completion of the real, the budget department shall not re-verification and correction to the scene, not only affects the work efficiency, but also prone to misunderstanding, leading to poor coordination between departments.
Horizontally, the building will be located in the settlement, the relevant departments of the cost impact factors and systems to manage them, through the establishment of standardized work systems and processes, strengthen collaboration, the cost of the whole process to achieve all-round control.
First, according to construction drawings and technical information on technical measures, construction procedures, work organization, mechanical equipment selection, and allocation of human resources, careful analysis and study, to optimize the construction program, the rational allocation of production factors, reasonable and feasible for the preparation of scientific responsibility to create conditions for the budget.
Meanwhile, after repeated comparisons to develop materials, mechanical unit control table, combined with on-site construction conditions were calculated for each sub-project of the responsibility of the budget.
If a lack of project cost control plans, no pre-development cost targets, how can we inspect the implementation of the target and adjust them, only to strengthen the post-control; Cost control system, is the work content of the relevant factors that affect the cost of the system to manage and regulate, and to ensure the implementation of the concept of cost control to the relevant departments, in one aspect or part is not a loophole, and will not like such a project would be left to the last question, by the Ministry of sticking to a hard budget buckle to reduce costs, especially when some of the other departments, due to strict cost impact, such as the content is not enough to confirm the completion of the real, the budget department shall not re-verification and correction to the scene, not only affects the work efficiency, but also prone to misunderstanding, leading to poor coordination between departments.
Horizontally, the building will be located in the settlement, the relevant departments of the cost impact factors and systems to manage them, through the establishment of standardized work systems and processes, strengthen collaboration, the cost of the whole process to achieve all-round control.
Online since: November 2005
Authors: Maria do Carmo de Andrade Nono, Cosme Roberto Moreira Silva, Carlos Alberto Alves Cairo, D.S. Almeida
Addition of niobia, as a co-dopant in the Y2O3-ZrO2 system, can reduce
the thermal conductivity and improve mechanical properties of the coating.
INTRODUCTION The EB-PVD process allows attaining coverings with unique properties.
Pentavalent oxides are positively charged, opposite to the stabiliser, when dissolved in the ZrO2 lattice, the addition of these oxides in the PSZ will definitely affect the original defect structure, thus also its properties.
Ta2O5 has been found to affect the phase stability and the electrical properties of ZrO2, and Nb2O5 has also been found to dramatically change the grain boundary electrical conductivity[18].
Y., et ali, Low thermal phase stability and mechanical properties of Y2O3 and Nb2O5 co-doped tetragonal zirconia polycrystal ceramics, Journal of Materials Science Letters, 17, p. 185187, 1998
INTRODUCTION The EB-PVD process allows attaining coverings with unique properties.
Pentavalent oxides are positively charged, opposite to the stabiliser, when dissolved in the ZrO2 lattice, the addition of these oxides in the PSZ will definitely affect the original defect structure, thus also its properties.
Ta2O5 has been found to affect the phase stability and the electrical properties of ZrO2, and Nb2O5 has also been found to dramatically change the grain boundary electrical conductivity[18].
Y., et ali, Low thermal phase stability and mechanical properties of Y2O3 and Nb2O5 co-doped tetragonal zirconia polycrystal ceramics, Journal of Materials Science Letters, 17, p. 185187, 1998
Online since: October 2014
Authors: Zhen Peng Qu, Zhi Bo Yang
According to the research on the structure and properties of different soft start devices applied to long distance and large capacity belt conveyor.
It's easy to burn out the motor, we should increase the safety factor of the motor when we choose the motor, then it adds energy consumption.
The use of frequency converter can make the performance of each motor close to each other, reducing the differences between the motor load power. (3)High power factor The input power factor of the converter is about 0.99, energy-saving effect is remarkable[3].(4)Easy installation, simple maintenance.
The liquid can be converted into mechanical energy, reducer is driven by the output shaft.
CST, developed by the American Rockwell Automation, Inc, is a mechanical governor system combined liquid viscous transmission with planetary gear train[6].It is a kind of mechanical and electrical integration of liquid drive system.CST is composed of input and output parts, clutch assembly.
It's easy to burn out the motor, we should increase the safety factor of the motor when we choose the motor, then it adds energy consumption.
The use of frequency converter can make the performance of each motor close to each other, reducing the differences between the motor load power. (3)High power factor The input power factor of the converter is about 0.99, energy-saving effect is remarkable[3].(4)Easy installation, simple maintenance.
The liquid can be converted into mechanical energy, reducer is driven by the output shaft.
CST, developed by the American Rockwell Automation, Inc, is a mechanical governor system combined liquid viscous transmission with planetary gear train[6].It is a kind of mechanical and electrical integration of liquid drive system.CST is composed of input and output parts, clutch assembly.
Online since: October 2010
Authors: Stefano Podestà, Sonia Parodi
On the
one hand the physiological deterioration can cause architectonical elements significant compromise
for the natural decay of the mechanical properties of the materials.
In order to consider the knowledge level, the mechanical properties of the masonry have been subdivided for a confidence factor FC, assumed, in this case, equal to 1.21.
The reduction of the confidence factor (from 1.21 to 1) determines new values of safety indices equal to: IS,LLS = 0.76 e fa,LLS = 0.91.
In order to put in evidence the importance of the knowledge phase, the seismic evaluation through the simplified model previously used, has been calculated varying the values of the masonry mechanical properties.
In this specific case the masonry quality does not affect only the mechanical strength but, the definition of the transversal connection level between the different curtains could allow a final judge of the structural safety more reliable.
In order to consider the knowledge level, the mechanical properties of the masonry have been subdivided for a confidence factor FC, assumed, in this case, equal to 1.21.
The reduction of the confidence factor (from 1.21 to 1) determines new values of safety indices equal to: IS,LLS = 0.76 e fa,LLS = 0.91.
In order to put in evidence the importance of the knowledge phase, the seismic evaluation through the simplified model previously used, has been calculated varying the values of the masonry mechanical properties.
In this specific case the masonry quality does not affect only the mechanical strength but, the definition of the transversal connection level between the different curtains could allow a final judge of the structural safety more reliable.
Online since: October 2006
Authors: Kiyotaka Wasa, Isaku Kanno, Takaaki Suzuki
Dielectric Properties.
It is seen typical ferroelectric properties.
Typical electrostrictive properties are shown in Fig.4.
Typical electrostrictive properties of PMNT thin films.
Table 1 and 2 show the summary of the structural properties and piezoelectric properties of PMNT thin films for different composition.
It is seen typical ferroelectric properties.
Typical electrostrictive properties are shown in Fig.4.
Typical electrostrictive properties of PMNT thin films.
Table 1 and 2 show the summary of the structural properties and piezoelectric properties of PMNT thin films for different composition.
Online since: August 2013
Authors: Rong Yuan Jou
Moisture migration is a function of internal conditions, including the properties, temperature, and moisture content of the material.
The value of h was affected by various parameters, including the speed and physical properties of the thermal fluid, temperature differences between fluids, and other material and physical properties.
This method is affected by relative humidity, temperature, and wind velocity and direction.
To summarize, the two factors affecting drying were first, a driving force for mass transfer, where the partial moisture pressure of the wet material’s surface PSurface Moisture was greater than that of the hot air PAir Moisture, and second, a driving force for the heat transfer, where the temperature of the hot air Tair was higher than the temperature of the wet material’s surface TMaterial Surface.
The drying rate, at 3.64%/h, was affected by the ambient temperature.
The value of h was affected by various parameters, including the speed and physical properties of the thermal fluid, temperature differences between fluids, and other material and physical properties.
This method is affected by relative humidity, temperature, and wind velocity and direction.
To summarize, the two factors affecting drying were first, a driving force for mass transfer, where the partial moisture pressure of the wet material’s surface PSurface Moisture was greater than that of the hot air PAir Moisture, and second, a driving force for the heat transfer, where the temperature of the hot air Tair was higher than the temperature of the wet material’s surface TMaterial Surface.
The drying rate, at 3.64%/h, was affected by the ambient temperature.
Online since: February 2019
Authors: Ivan N. Egorov, Svetlana I. Egorova, Viktor P. Kryzhanovsky
Many factors influence quality of powder obtained by milling.
Letyuk, Physico-chemical basics of production, properties and applications of ferrites, Metallurgiya, Moscow, 1979
Kaneva, Estimation of ferrite powders activity by microdistortion energy, in: Ferrites structure and properties, Nauka i tekhnika., Minsk, 1974, pp. 128-132
Podgornaya, Study of strontium hexaferrite powders milling duration influence on microstructure and properties of magnets on their basis, J.
Lyubina, Structure and magnetic properties of nanocrystalline alloys based on Nd2Fe14B obtained by various techniques.
Letyuk, Physico-chemical basics of production, properties and applications of ferrites, Metallurgiya, Moscow, 1979
Kaneva, Estimation of ferrite powders activity by microdistortion energy, in: Ferrites structure and properties, Nauka i tekhnika., Minsk, 1974, pp. 128-132
Podgornaya, Study of strontium hexaferrite powders milling duration influence on microstructure and properties of magnets on their basis, J.
Lyubina, Structure and magnetic properties of nanocrystalline alloys based on Nd2Fe14B obtained by various techniques.
Online since: January 2018
Authors: Erzhena Khartaeva, Sergey Nomoev, Ivan Vasilevskii
We investigated the influence of the surface properties of a low-temperature-grown GaAs photoconductive antenna on terahertz (THz) response power.
The crystal layer is also important since it determines to a large extent the electrophysical properties of LT-GaAs.
In this paper, we investigated the correlation between THz power and the surface properties of an LT-GaAs photoconductive antenna.
The surface properties were quantified by the roughness and the grain size.
Seto, The electrical properties of polycrystalline silicon films, J.
The crystal layer is also important since it determines to a large extent the electrophysical properties of LT-GaAs.
In this paper, we investigated the correlation between THz power and the surface properties of an LT-GaAs photoconductive antenna.
The surface properties were quantified by the roughness and the grain size.
Seto, The electrical properties of polycrystalline silicon films, J.
Online since: April 2012
Authors: Huan Xue, Rong Feng Li, Rui Ge, Hong Chuan Zhu, Wen Jie Peng
In addition, the testing of indentation diameter is the most important factor of measuring accuracy, the material heterogeneity and surface condition under different manufacturing process conditions will seriously affect the measurement results.
The theory of using indentation test to determine the mechanical properties of materials was then gradually improved.
The introduction of stress field F1 will affect the stress field in the original one F0, causing the stress redistribution.
New types of SFM and SSM for residual stress determination In resent years, more and more attention has been paid on material microstructure and properties, along with the rapid development of new materials technology.
Therefore pressure deep can be controlled as small as nanometer (0.1nm ~ 100nm), which is appropriate for the ultra-thin material properties test.
The theory of using indentation test to determine the mechanical properties of materials was then gradually improved.
The introduction of stress field F1 will affect the stress field in the original one F0, causing the stress redistribution.
New types of SFM and SSM for residual stress determination In resent years, more and more attention has been paid on material microstructure and properties, along with the rapid development of new materials technology.
Therefore pressure deep can be controlled as small as nanometer (0.1nm ~ 100nm), which is appropriate for the ultra-thin material properties test.