Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: May 2012
Authors: Ke Chun Sun, Wei Jun Zhang
There are many factors that can affect the dewatering performance, such as particle size, extracellular polymeric substances, metal ions, organic matter, filamentous bacteria, a variety of conditioning agents.
Its properties are generally the same as ordinary water.
Bound water is the part of water which properties is changed due to the impact of the sludge particles, including capillary water, sludge particle surface adsorbed water.
Smith and Vesilind recommends to careful consider the factors which can affect the results, and confirms the dissolved gases in the sludge is one of the influencing factors.
In addition, the number of unfrozen water in the sludge have some controversy due to the influencing factors, such as the trapping water between the floc particles, the ice formation of intracellular water and the quantity of the particle adsorbed water etc, and the test fail to distinguish all these factors.
Its properties are generally the same as ordinary water.
Bound water is the part of water which properties is changed due to the impact of the sludge particles, including capillary water, sludge particle surface adsorbed water.
Smith and Vesilind recommends to careful consider the factors which can affect the results, and confirms the dissolved gases in the sludge is one of the influencing factors.
In addition, the number of unfrozen water in the sludge have some controversy due to the influencing factors, such as the trapping water between the floc particles, the ice formation of intracellular water and the quantity of the particle adsorbed water etc, and the test fail to distinguish all these factors.
Online since: October 2020
Authors: Radka Pernicová, Monika Utěšená, Jan Sestak
However, from the point of view of the builder the concrete structure can be seen and therefore it is exposed concrete regardless of its aesthetic properties.
However, in terms of surface finish and aesthetic parameters, in the Czech Republic there are no regulations or technical standards that would constitute important material parameters and properties.
The technical rules can be described as a simple handbook / textbook containing a brief overview of the factors that influence the final appearance of the concrete structure surface.
It should be noted that in order to achieve a satisfactory goal, it is important to respect the currently available legislative requirements in combination with respect for all variables affecting the final appearance and function of the concrete work / structure.
The right choice of formwork material is one of the most important factors in design and construction.
However, in terms of surface finish and aesthetic parameters, in the Czech Republic there are no regulations or technical standards that would constitute important material parameters and properties.
The technical rules can be described as a simple handbook / textbook containing a brief overview of the factors that influence the final appearance of the concrete structure surface.
It should be noted that in order to achieve a satisfactory goal, it is important to respect the currently available legislative requirements in combination with respect for all variables affecting the final appearance and function of the concrete work / structure.
The right choice of formwork material is one of the most important factors in design and construction.
Online since: July 2014
Authors: S. Muthukumaran, Jazeel Rahman Chukkan, M. Vasudevan, Ravi Kumar, S. Murugan, K.C. Ganesh, V. Maduraimuth
However, the effect of all influencing factors of laser welding on weld bead geometry has not been extensively studied.
The thermo-physical properties data of AISI 304L SS used in this analysis was taken from previous work which is shown in fig. 2 [13].
Fig. 2: Thermo-physical properties of 304L SS [13] Fig. 3: 3D Conical beam Source Finite Element Analysis.
Small differences in material properties used can also be the reason.
This can be attributed to the difference in stiffness, area of clamping, unclamping sequence, small differences in material properties used in simulation and experimental errors.
The thermo-physical properties data of AISI 304L SS used in this analysis was taken from previous work which is shown in fig. 2 [13].
Fig. 2: Thermo-physical properties of 304L SS [13] Fig. 3: 3D Conical beam Source Finite Element Analysis.
Small differences in material properties used can also be the reason.
This can be attributed to the difference in stiffness, area of clamping, unclamping sequence, small differences in material properties used in simulation and experimental errors.
Online since: September 2013
Authors: Jin Yong Xu, Cheng Gao, Bo Gao, Wen Yao Luo, Yi Guang Wang
Antibacterial stainless steel with corrosion resistance, Wear resistance, aesthetics of stainless steel itself, As well, have good antimicrobial properties, are widely used in daily life.
The author uses the double glow plasma surface metallurgy technology to study how to permeate Copper -cerium element into stainless steel [1], so as to obtain Surface alloy layer with excellent antibacterial properties.
Double glow plasma surface metallurgy technology is original in China with independent intellectual property rights of high technology [2], the process of Antibacterial preparation is complex.
Copper-cerium case depth, elements component in the layer affected by many factors, Mainly includes the distance between the work-piece and the source[3], Working pressure, holding temperature and time, work-piece and source voltage and so on.
Combined with the hollow cathode effect, Point discharge effect, Argon ion bombard Work-piece and the source, plasma sputters the copper-cerium particles, Under the action of electric field change into high-energy particles, Bombard, enter and spread to the work-piece surface, forms alloy layer with special physical and chemical mechanical and mechanical properties in the work-piece surface. 1.2 Experimental material The selection of workpiece and the source material: Work-piece adopts 304 stainless steel (No.6cr19ni10 steel), work-piece size is 70mm×25mm×2mm.
The author uses the double glow plasma surface metallurgy technology to study how to permeate Copper -cerium element into stainless steel [1], so as to obtain Surface alloy layer with excellent antibacterial properties.
Double glow plasma surface metallurgy technology is original in China with independent intellectual property rights of high technology [2], the process of Antibacterial preparation is complex.
Copper-cerium case depth, elements component in the layer affected by many factors, Mainly includes the distance between the work-piece and the source[3], Working pressure, holding temperature and time, work-piece and source voltage and so on.
Combined with the hollow cathode effect, Point discharge effect, Argon ion bombard Work-piece and the source, plasma sputters the copper-cerium particles, Under the action of electric field change into high-energy particles, Bombard, enter and spread to the work-piece surface, forms alloy layer with special physical and chemical mechanical and mechanical properties in the work-piece surface. 1.2 Experimental material The selection of workpiece and the source material: Work-piece adopts 304 stainless steel (No.6cr19ni10 steel), work-piece size is 70mm×25mm×2mm.
Online since: July 2024
Authors: Wen Fang Xing, Hua Zhen Wei, Shu Hu Li, Dan Yong Wang
There are many factors that affect the longitudinal compressive strength of fiber reinforced composite materials, and the properties of the fiber reinforced phase, resin matrix, and fiber/resin interface all have a significant impact on it.
In recent years, researchers have conducted extensive research on the influencing factors, failure modes, and failure strength prediction methods of unidirectional composite materials.
In order to better utilize the mechanical properties of composite materials, it is necessary to conduct compression performance research, providing a basic basis for engineering design.
Although the extended buckling model reflects the influence of the mechanical properties of resin and fiber elastic modulus on longitudinal compressive strength, the model assumes that the fiber resin interface is well bonded and does not consider the impact of material interface performance on longitudinal compressive performance.
At the micro scale, it mainly focuses on the analysis and prediction of mechanical properties of single-phase materials, research on interface characteristics of composite materials, mutual penetration behavior between different materials, crack propagation, and other aspects.
In recent years, researchers have conducted extensive research on the influencing factors, failure modes, and failure strength prediction methods of unidirectional composite materials.
In order to better utilize the mechanical properties of composite materials, it is necessary to conduct compression performance research, providing a basic basis for engineering design.
Although the extended buckling model reflects the influence of the mechanical properties of resin and fiber elastic modulus on longitudinal compressive strength, the model assumes that the fiber resin interface is well bonded and does not consider the impact of material interface performance on longitudinal compressive performance.
At the micro scale, it mainly focuses on the analysis and prediction of mechanical properties of single-phase materials, research on interface characteristics of composite materials, mutual penetration behavior between different materials, crack propagation, and other aspects.
Online since: June 2014
Authors: Nan Li, Chao Liu, Xin Xu
This paper explains three factors which embark from the basic principle effect of SSD lifespan and induced the reliability strategies/the method of SSD lifespan prediction during the SSD design and usage period.
People begin to pay attention to a concept of SSD which is different from the traditional mechanical hard disk: SSD lifespan.
We have designed a SSD`s lifespan management software which predict and manage the SSD lifespan Brief introduction of the factors that affecting lifespan of the SSD 2.1 WL(Wear leveling) Wear leveling is a fact of life with NAND flash – blocks start to suffer bit failures after a certain number of erase/write cycles (usually specified from the thousands to the hundreds of thousands) and it is only natural that software will attempt to over-write some blocks more than others.
SSD lifespan monitoring mechanism We proposed a detection mechanism for the SSD through analysis and study of SSD factors that affecting lifespan.
Supported feature: It will show the related protocol and optimized properties of SSD supported. 3.2 Parameters upload method Read the SSD information by using SATA standard command.
People begin to pay attention to a concept of SSD which is different from the traditional mechanical hard disk: SSD lifespan.
We have designed a SSD`s lifespan management software which predict and manage the SSD lifespan Brief introduction of the factors that affecting lifespan of the SSD 2.1 WL(Wear leveling) Wear leveling is a fact of life with NAND flash – blocks start to suffer bit failures after a certain number of erase/write cycles (usually specified from the thousands to the hundreds of thousands) and it is only natural that software will attempt to over-write some blocks more than others.
SSD lifespan monitoring mechanism We proposed a detection mechanism for the SSD through analysis and study of SSD factors that affecting lifespan.
Supported feature: It will show the related protocol and optimized properties of SSD supported. 3.2 Parameters upload method Read the SSD information by using SATA standard command.
Online since: October 2013
Authors: Qiang Wu, Lan Ying Xu
For the laser welding of vehicle body, not only ensuring the mechanical properties of joints, but also paying attention to their appearance quality.
In the controlling aspect of the mechanical properties of laser welding joint, the research literature is more.
At the time of the laser welding, the melting width of joint initial segment appears unstable phenomenon, affecting the performance of welding joint, especially affecting body appearance quality; at the same time galvanized layer near the joints will be destroyed inevitably, so the corrosion performance of workpieces will suffer a severe challenge; however, this research literature on this field is not much at present.
Table 1 Chemical composition and mechanical properties of tested materials /MPa /Mpa (%) C Si Mn P S Others 800~950 500 10 0.18 0.5 2.0 0.025 0.015 ≥0.015 In order to reduce the weld defect, the welding spot is cleaned with the acetone before welding.
The main influencing factors of the surface tension contain the nature of the material and properties of adjacent phase, temperature and liquid composition.
In the controlling aspect of the mechanical properties of laser welding joint, the research literature is more.
At the time of the laser welding, the melting width of joint initial segment appears unstable phenomenon, affecting the performance of welding joint, especially affecting body appearance quality; at the same time galvanized layer near the joints will be destroyed inevitably, so the corrosion performance of workpieces will suffer a severe challenge; however, this research literature on this field is not much at present.
Table 1 Chemical composition and mechanical properties of tested materials /MPa /Mpa (%) C Si Mn P S Others 800~950 500 10 0.18 0.5 2.0 0.025 0.015 ≥0.015 In order to reduce the weld defect, the welding spot is cleaned with the acetone before welding.
The main influencing factors of the surface tension contain the nature of the material and properties of adjacent phase, temperature and liquid composition.
Online since: April 2014
Authors: Xue Feng, Li Min Zhao, Xu Jun Mi, Yan Feng Li, Hao Feng Xie, Xiang Qian Yin
The thermal and thermomechanical properties of these epoxy polymers were characterized by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA).
We used a method which called fold-deploy shape memory test to characterize the shape memory properties [21].
From the DMA test, the increasing C12-14 alcohols content lowers the crosslink density of the polymer network, which is the primary affected factor for the variety of mechanical properties of the polymers.
The thermo-mechanical properties of epoxy SMP system has been systematically studied in this paper.
[14] Liu Y, Han C, Tan H, et al., Thermal, mechanical and shape memory properties of shape memory epoxy resin, Mater.
We used a method which called fold-deploy shape memory test to characterize the shape memory properties [21].
From the DMA test, the increasing C12-14 alcohols content lowers the crosslink density of the polymer network, which is the primary affected factor for the variety of mechanical properties of the polymers.
The thermo-mechanical properties of epoxy SMP system has been systematically studied in this paper.
[14] Liu Y, Han C, Tan H, et al., Thermal, mechanical and shape memory properties of shape memory epoxy resin, Mater.
Online since: August 2016
Authors: Jiří Šafka, Martin Seidl, Jiří Habr, Michal Ackermann, Jiří Bobek, Luboš Bĕhálek
The optimal particle size fraction of coir fibres with respect to good final mechanical properties is in the range between 0,5 and 2 mm.
The moisture content in the natural fibres is one of the critical factors that have a strong impact on the interphase quality because of releasing of the water evaporated by the high processing temperatures.
Fig. 8: Printed specimen on 3D printer Easy3DMaker Tab. 2: Parameters settings for 3D printer Easy3DMaker Mechanical properties In order to evaluate the mechanical properties of created specimens the tensile tests were carried out in the laboratory of Technical University of Liberec.
The presence of natural fibres significantly improved the mechanical properties of the tested specimens.
The natural fibre presence in the composite has also a strong impact on the final physical and mechanical properties.
The moisture content in the natural fibres is one of the critical factors that have a strong impact on the interphase quality because of releasing of the water evaporated by the high processing temperatures.
Fig. 8: Printed specimen on 3D printer Easy3DMaker Tab. 2: Parameters settings for 3D printer Easy3DMaker Mechanical properties In order to evaluate the mechanical properties of created specimens the tensile tests were carried out in the laboratory of Technical University of Liberec.
The presence of natural fibres significantly improved the mechanical properties of the tested specimens.
The natural fibre presence in the composite has also a strong impact on the final physical and mechanical properties.
Online since: April 2014
Authors: Eva Tillová, Lenka Hurtalová, Mária Chalupová
The iron intermetallic phase has the greatest influence on mechanical properties.
Long and brittle Al5FeSi platelets (more than 500 µm) can adversely affect mechanical properties, especially ductility, and also lead to the formation of excessive shrinkage porosity defects in castings.
These intermetallic compounds are hard and can adversely affect the overall properties of the casting.
The influence of intermetallic phases to mechanical and fatigue properties depends on size, volume and morphology of these phases [11].
This form is considered less harmful to the mechanical properties than Al5FeSi needles.
Long and brittle Al5FeSi platelets (more than 500 µm) can adversely affect mechanical properties, especially ductility, and also lead to the formation of excessive shrinkage porosity defects in castings.
These intermetallic compounds are hard and can adversely affect the overall properties of the casting.
The influence of intermetallic phases to mechanical and fatigue properties depends on size, volume and morphology of these phases [11].
This form is considered less harmful to the mechanical properties than Al5FeSi needles.