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Online since: August 2013
Authors: Ding Yong Yu, Peng Tang
Evaluation for soft soil foundation treatment technology of port engineering involves many factors which include qualitative factors and quantitative factors.
Zhu Qikun and Zhang Xiaomin [1] gave influence degree and evaluation results of factors affecting soft soil foundation treatment schemes through expert investigation methods and engineering analogy methods.
Advantages of this evaluation method can combine qualitative factors and quantitative factors, so as to quantitatively analyze some qualitative decision issues.
P is indicator weight allocation matrix of m factors.
In addition, the maximum thickness of mucky soil is about 13m, with relatively large thickness and poor physical and mechanical property, so soft soil foundation treatment must be conducted on this project.
Zhu Qikun and Zhang Xiaomin [1] gave influence degree and evaluation results of factors affecting soft soil foundation treatment schemes through expert investigation methods and engineering analogy methods.
Advantages of this evaluation method can combine qualitative factors and quantitative factors, so as to quantitatively analyze some qualitative decision issues.
P is indicator weight allocation matrix of m factors.
In addition, the maximum thickness of mucky soil is about 13m, with relatively large thickness and poor physical and mechanical property, so soft soil foundation treatment must be conducted on this project.
Online since: October 2011
Authors: Mohammad K. Alkam, P. Barry Butler
The theoretical CJ point properties of the present mixture have been computed using RGEQUIL, an equilibrium code developed by Butler and Schmitt [19].
The second issue is the metallurgical limit of the substrate material as overheating the surface of the substrate could drastically affect its mechanical properties.
This surface is imaginary, passive and does not affect the flow conditions.
Results of the present investigation show that the flow properties at the exit of the tube are insensitive to the substrate existence at a stand-off distance of 20 mm.
An imaginary and passive circular surface with one tube diameter is place 1 mm ahead of the substrate in order to monitor properties of the gas flow heading for the substrate.
The second issue is the metallurgical limit of the substrate material as overheating the surface of the substrate could drastically affect its mechanical properties.
This surface is imaginary, passive and does not affect the flow conditions.
Results of the present investigation show that the flow properties at the exit of the tube are insensitive to the substrate existence at a stand-off distance of 20 mm.
An imaginary and passive circular surface with one tube diameter is place 1 mm ahead of the substrate in order to monitor properties of the gas flow heading for the substrate.
Online since: August 2025
Authors: Nisar Ali, Qazi Shakeel Ahmad, Majid Khan, Amir Khesro, H. Alrobei
Therefore, by reducing the density of dangling bonds (dislocations), it is possible to improve VOC and fill factors.
It was noted that the capping agent directly affects the surface of NPs, having a significant impact on the oriented attachment process and the surface-associated properties of nanoparticles.
PL spectra of CdZnS QDs as synthesize and synthesized with capping agents I-V characteristics The I-V properties can be affected in a variety of ways depending on the capping agent selected.
These groups can modify the charge transport properties or enable particular interactions with other materials in a device to affect the I-V behavior [33].
The I-V properties of CdZnS QDs can be affected in a number of ways by the addition of a capping chemical to their surface.
It was noted that the capping agent directly affects the surface of NPs, having a significant impact on the oriented attachment process and the surface-associated properties of nanoparticles.
PL spectra of CdZnS QDs as synthesize and synthesized with capping agents I-V characteristics The I-V properties can be affected in a variety of ways depending on the capping agent selected.
These groups can modify the charge transport properties or enable particular interactions with other materials in a device to affect the I-V behavior [33].
The I-V properties of CdZnS QDs can be affected in a number of ways by the addition of a capping chemical to their surface.
Online since: September 2014
Authors: Majid Elyasi, Saharnaz Montazeri, Amin Moradpour
By noticing the discussed energy absorption mechanism and the essential factors of energy absorption system, a new design of the energy absorption sample is suggested in Fig. (1-a).
Necessary to mention that geometrically, thickness, length and diameter of tube are essential and prominent factors.
Mechanical property of aluminum, regardless of the anisotropy effects, is also illustrated in Table 1.
Mechanical property of the aluminum is considered as an input for the software.
In energy absorption system decay symmetry is one of the main factors.
Necessary to mention that geometrically, thickness, length and diameter of tube are essential and prominent factors.
Mechanical property of aluminum, regardless of the anisotropy effects, is also illustrated in Table 1.
Mechanical property of the aluminum is considered as an input for the software.
In energy absorption system decay symmetry is one of the main factors.
Online since: January 2025
Authors: Francesco Petrini, Mattia Francioli, Niccolò Moroni, Alessandro Guarnieri
Given the complexity of possible scenarios, which can depend on numerous factors, the assumed M-H case represents a plausible sequence of events: the considered scenario represents the situation in which an earthquake determines damages to the structure to the extent of causing a fire to break out in one of its compartments (usually where technical installations are located): the fire blazes in a structure already damaged by the main seismic event and, as it frequently happens, the structure could be affected by minor aftershocks, thus impacting a structure damaged by both hazards (i.e., earthquake and fire).
This issue received more attention following the events that occurred in Japan in 2011 [3, 4]: studies [5, 6] have highlighted how factors of mechanical nature (degradation of the material), geometric (increase in stress due to irreversible deformations) and damage to non-structural components determine a reduction in structural resistance.
For sake of brevity, for detailed information regarding the physical (i.e., thermal expansion, specific heat, thermal conductivity, …) and mechanical properties (i.e., constitutive law) of steel under fire, the reader is addressed to proven references [11], [13], [14]; however, some aspects are here recalled: high temperatures induce a dual phenomenon in steel [15], resulting in both a decrease in capacity (due to the degradation of material properties at high temperatures) and an increase in demand (due to the significant thermal deformations of elements subjected to heating, causing distortions and additional stresses).
(a) Stress-strain relationship for carbon steel at elevated temperatures; (b) reduction factors for the stress-strain relationship of carbon steel at elevated temperature [15].
Due to the softening of the material and the consequent reduction of the mechanical properties, the M-N domain reduces itself, allowing the possibility of the so-called early plasticization.
This issue received more attention following the events that occurred in Japan in 2011 [3, 4]: studies [5, 6] have highlighted how factors of mechanical nature (degradation of the material), geometric (increase in stress due to irreversible deformations) and damage to non-structural components determine a reduction in structural resistance.
For sake of brevity, for detailed information regarding the physical (i.e., thermal expansion, specific heat, thermal conductivity, …) and mechanical properties (i.e., constitutive law) of steel under fire, the reader is addressed to proven references [11], [13], [14]; however, some aspects are here recalled: high temperatures induce a dual phenomenon in steel [15], resulting in both a decrease in capacity (due to the degradation of material properties at high temperatures) and an increase in demand (due to the significant thermal deformations of elements subjected to heating, causing distortions and additional stresses).
(a) Stress-strain relationship for carbon steel at elevated temperatures; (b) reduction factors for the stress-strain relationship of carbon steel at elevated temperature [15].
Due to the softening of the material and the consequent reduction of the mechanical properties, the M-N domain reduces itself, allowing the possibility of the so-called early plasticization.
Online since: April 2008
Authors: Irene J. Beyerlein
Another example of a reversal load sequence is compression testing along the extrusion direction
(ED) of ECAE samples, a common test to probe their mechanical properties.
Material and microstructural properties, such as SFE and presence of second phase particles, need to be taken into account.
As will be described shortly, ατB∆ , ατR∆ , and ατL∆ depend on many factors.
Other factors.
There are some factors that have not been addressed in the present examples.
Material and microstructural properties, such as SFE and presence of second phase particles, need to be taken into account.
As will be described shortly, ατB∆ , ατR∆ , and ατL∆ depend on many factors.
Other factors.
There are some factors that have not been addressed in the present examples.
Online since: June 2014
Authors: Sergey Betsofen, Mihail Chizhikov
A considerable disadvantage of Al-Li alloys is a significant anisotropy of mechanical properties and a sensitivity to long-term low temperature heating [2], resulting in a poor performance of destruction mechanics of fracture properties.
To explain this effect consider the effect of the L12-ordered δ' phase on the anisotropy of the properties of the alloy.
Kolobnev, Aluminum–Lithium Alloys: Structure and Properties, Naukova Dumka, Kiev, 1992 [in Russian]
Effect of orientation on the mechanical properties and crystallographic texture of 2195, Aluminum-Lithium alloy.
Rostova, Texture and anisotropy of mechanical properties of the alloy Al-Mg-Li-Zn-Sc, Metally. № 5 (2008) 57-65.
To explain this effect consider the effect of the L12-ordered δ' phase on the anisotropy of the properties of the alloy.
Kolobnev, Aluminum–Lithium Alloys: Structure and Properties, Naukova Dumka, Kiev, 1992 [in Russian]
Effect of orientation on the mechanical properties and crystallographic texture of 2195, Aluminum-Lithium alloy.
Rostova, Texture and anisotropy of mechanical properties of the alloy Al-Mg-Li-Zn-Sc, Metally. № 5 (2008) 57-65.
Online since: February 2013
Authors: Hui Chen, Ning Xia, Zhi Min Zhu
The quality of the welded joints is affected by different environmental conditions.
Different environmental conditions such as temperature, humidity, wind speed and dust have a great impact on the welding porosity, the softening of welded joint, the welding residual stress and mechanical properties of the welding.
The float range of surface hardness became larger with increased corrosion time, regardless of the weld zone, heat affected zone or the base metal.
Corrosion after 14 days under ambient humidity conditions, tensile specimens were spited in the heat-affected zone.
Atmospheric corrosion and its influencing factors of aluminum and aluminum alloys [J].Corrosion & protection, 2009, 30 (6):359-365, in Chinese
Different environmental conditions such as temperature, humidity, wind speed and dust have a great impact on the welding porosity, the softening of welded joint, the welding residual stress and mechanical properties of the welding.
The float range of surface hardness became larger with increased corrosion time, regardless of the weld zone, heat affected zone or the base metal.
Corrosion after 14 days under ambient humidity conditions, tensile specimens were spited in the heat-affected zone.
Atmospheric corrosion and its influencing factors of aluminum and aluminum alloys [J].Corrosion & protection, 2009, 30 (6):359-365, in Chinese
Online since: September 2014
Authors: Rong Liang Wu
It not only affects the water quality, but also cause water waste.
In the process of water supply and drainage design, sanitary wares and water distribution equipment will also affect water savings.
Solar energy as an inexhaustible new cleaning energy, it is more used in the hot water supply system.By using the direct heating equipment of solar energy, include vacuum tube and heat tube, the heat collecting efficiency is high, and has good insulation properties, little affected by environment, fully automatic operation, simple operation, convenient maintenance, can be used throughout the year.In the design of solar water heating system, we should pay attention to the following several aspects: collector to choose according to actual condition, considering the antifreeze performance, thermal shock resistance and bearing capacity and other factors; cold regions should adopt reliable way of antifreeze; take the auxiliary heating when necessary.
References: [1] Songcai Chen: Building water supply and drainage (Mechanical Industry Press, Beijing 2011)
In the process of water supply and drainage design, sanitary wares and water distribution equipment will also affect water savings.
Solar energy as an inexhaustible new cleaning energy, it is more used in the hot water supply system.By using the direct heating equipment of solar energy, include vacuum tube and heat tube, the heat collecting efficiency is high, and has good insulation properties, little affected by environment, fully automatic operation, simple operation, convenient maintenance, can be used throughout the year.In the design of solar water heating system, we should pay attention to the following several aspects: collector to choose according to actual condition, considering the antifreeze performance, thermal shock resistance and bearing capacity and other factors; cold regions should adopt reliable way of antifreeze; take the auxiliary heating when necessary.
References: [1] Songcai Chen: Building water supply and drainage (Mechanical Industry Press, Beijing 2011)
Online since: April 2015
Authors: Antonio Ferreira Miguel
In the first step, physical properties of nanofluids consisting of deionized water and different volume concentrations of Al2O3 nanoparticles is measured.
If n < 1 the fluid exhibits shear-thinning properties (pseudoplastic behavior) whereas if n > 1 the fluid shows shear-thickening behavior.
In both cases it is clear that, apart from the properties of porous structure, the hydraulic permeability depends on the properties of the permeant fluid [31,46,47].
Castro (Eds.), Nanofluids: Synthesis, Properties and Applications, Nova Science Pub., New York, 2014
Yang, Thermophysical and electrokinetic properties of nanofluids–a critical review, Applied Thermal Engineering. 28 (2008) 2109–2125
If n < 1 the fluid exhibits shear-thinning properties (pseudoplastic behavior) whereas if n > 1 the fluid shows shear-thickening behavior.
In both cases it is clear that, apart from the properties of porous structure, the hydraulic permeability depends on the properties of the permeant fluid [31,46,47].
Castro (Eds.), Nanofluids: Synthesis, Properties and Applications, Nova Science Pub., New York, 2014
Yang, Thermophysical and electrokinetic properties of nanofluids–a critical review, Applied Thermal Engineering. 28 (2008) 2109–2125