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Online since: February 2014
Authors: Lin Zhu, Zhi Feng Liu, Xiao Cheng Su
However, due to the impact of various factors of construction technology, machinery and equipment, geological conditions, such as the quality of the construction team, quality control has great difficulty.
However, due to the impact of various factors of construction technology, machinery and equipment, geological conditions, such as the quality of the construction team, quality control has great difficulty.
The bear vertical load of pile, the largest axial stress in the pile top 3m or 4m range, in this depth range, due to the lack of overburden pressure, mixing quality is easily affected by the.
Through consolidation which has been completed, we observe and judge the consolidation of integrity, and consolidate body length and the core which was made of standard laboratory physics properties of specimens, in order to obtain the strength characteristics of control engineering, or check the construction quality, and identificate its compliance with design requirements.
Comprehensive evaluation method considering the various factors influencing the quality of cement mixing pile, and quantified, so the evaluation is more comprehensive, scientific, reasonable, easy popularization and application.
Online since: February 2013
Authors: Bao Qi Zuo, Chun Min Deng, Tian Yi Zhong
In recent years, SF has been processed into various material formats including films, electrospun fibers, three-dimensional porous scaffolds, microspheres and hydrogels for potential biomedical applications due to its impressive biocompatibility, biodegradability, and mechanical properties [3-7].
Using of these factors can effectively solve the problem that the hydrogelation of SF is too slow, such as adding organic solvents or ions, applied ultrasonic vibration [10] or electric fields [11], etc.
The SF hydrogel has therefore been considered as a valuable candidate for biomedical applications, but it is still necessary to improve the preparation of SF hydrogel with excellent or particular structure and properties [12-15].
In order to study the structural and morphological properties, hydrogels were characterized by surface tension, FTIR, X-ray diffraction and SEM analysis.
Structure and properties of silk hydrogels.
Online since: January 2019
Authors: Gao Feng Tian, Yang Chen, Bin Gan, Jin Wen Zou, Yan Yang
The size and distribution of g¢ have important effect on the mechanical properties, especially secondary g¢.
One of their core areas of research and development is building constitutive relationships between the microstructure and mechanical properties, which provides data and foundation for optimization design and simulation of material processing [10,11].
In this paper, the effect of various g¢ microstructures on the mechanical properties will be investigated based on micropillar compression coupled with EBSD technology in a polycrystalline nickel-base superalloy, and the CRSS was also obtained.
Effect of cooling medium on g' precipitates and properties in FGH4096 alloy.
Characterization and modelling of the mechanical properties of the isolated phases in g/g' microstructure.
Online since: January 2014
Authors: Zhi Wei Deng, Li Song Yin, Xi Di Chen, Qi Zhou Cai
It is helpful to improve corrosion resistance properties of the metal surface in the form of additive [6].
In order to improve the purpose and scientific of the experiment, orthogonal test was adopted with four factors and three levels table L9 (34), such as current density, pulse frequency, duty ratio and Na2WO4 concentration, the specific processing a list of factors and levels shown in Table 1.
Table 1 Factors and level of the orthogonal experiment factors levels 1 2 3 Pulse frequency(Hz) A 300 500 700 Current density() B 3.0 5.0 7.0 Na2WO4 concentration(g/l) C 4.0 2.0 0.0 Duty ratio D 30%/70% 50%/50% 60%/40% 3.
It is possible that the corrosion resistance of MAO coatings were affected by surface morphologies, phase compositions and other factors.
The properties of coating formed by microplasma oxidation on magnesium alloy [J].
Online since: September 2011
Authors: Yan Fei Yang, Rang Tong Liu, Feng Hua Liu
Secondly, according to application requirements, the initial compact structure of fabric must be determined, such as fabric texture, tightness and cover factor etc., otherwise fabric cannot be manufactured.
After the successful weaving fabric will form a certain appearance, by which the surface structure is affected.
There are many properties related to fabric thickness, such as tenacity, warmth retension, permeability, wind resistance, stiffness and draping property.
Because of the different application, differences of fabric properties are required, and structure decides property, so diversity and differences of fabric structure are resulted in.
,A General Model of a Fabric as a Geometric Mechanical Structure, J Tex.
Online since: November 2011
Authors: Long Quan Shao, Yuan Fu Yi, Hong Chen Liu, Ning Wen, Bin Deng, Yi Han Liu
This is a result of the improvement of intensity and performance as well as better aesthetic properties and color stability of these materials.
However, the final color of all-ceramic restoration is influenced by many factors.
properties, and excellent biological safety.
The color properties of the opaque and translucent materials mainly depend on the penetrable spectrum, which can be calculated through its spectral transmission factor.
Thus, when tooth tissues suffer serious discoloration or post-core restoration of teeth is needed, the above-mentioned property of all-ceramic restorations will become influencing factors.
Online since: July 2011
Authors: Wei Guo Zhao, Hai Ping Wang, Quan Feng Guo, Wei Li, Ji Hong Dong
Special material, structure and other factors determine that C/C composite has high specific strength, high specific modulus, good fracture toughness and excellent high temperature retention, high wear resistance, high ablation resistance[3], which could meet the requirements of aerospace components such as "high temperature, high pressure, high specific strength, light weight, high reliability".
Lamination defect in C/C composite Defects will make the performance of component reduced, damage mechanical and physical properties of component, affect its reliability, safety and service life.
Pinhole gathered type defect mainly affects composite's density.
However, due to the limit of composite's structure and testing methods itself, quite a lot of problems will appear during detecting process, and the accuracy and reliability are affected.
Luo: Research on Microstructure and Properties of the Wearable Carbon/Carbon Composite, in Aeronautical Manufacturing Technology, volume 15,(2009)
Online since: October 2025
Authors: Noorhafiza Muhammad, Mohd Haidiezul Jamal b. Ab Hadi, Wan Mohd Faizal Bin Wan Abd Rahim, Mohd Hazwan Mohd Hanid, Muhammad Hasif Hanif, Mohamad Syafiq Abdul Khadir, Mohd Shahrizal Dolah, Muhammad Nur Misbah
Rapid production of useful parts that can withstand harsh environments, like high mechanical loads and temperatures, is made possible by this technology.
Numerous variables affect ambient temperature, including the glass transition temperature (Tg) of the polymers used to make the filament and the surrounding environment[5].Polymer characteristics are greatly impacted by ambient temperature, especially when it comes to glass transition temperature (Tg) because it denotes the change from brittle to ductile states, the Tg is a crucial parameter that affects the mechanical behavior and stability of polymeric materials.
The influence of metal's reflective and conductive properties on maintaining consistent ambient temperatures and their impact on print quality using temperature-sensitive materials like ABS remains underexplored.
Furthermore, the effects of metal’s thermal conductivity and reflective properties on maintaining a stable ambient temperature particularly when working with heat-sensitive filaments like ABS have not been thoroughly explored.
This trend reflects the influence of environmental factors such as air draught and natural convection, which prevent a stable thermal environment from being maintained.
Online since: August 2014
Authors: Xiao Lin Zhang, Xiao Dong Jia, Ya Lin Lu, Dian Wen Liu, Chi Zhang
There are some factors affecting oxidised copper ores was hability, which is intimately associated with gangue minerals, etc.
Copper mineral ores contained mainly digenite and covellite.Copper ore grade was 1.13%, and combined mutagenesisT.f bacteria with ordinary domestication to improve the leaching rate of copper.Considering the ore particle size was reduced, the metal leaching rate, together with broken, production cost and other factors.
According to oxidizing leaching of ammonium sulfate, Delved into many influencing factors in the system, such as the molar ratio of ammonia and ammonium ion, leaching concentrate, liquid-solid ratio, temperature, etc.
And then determined the best process by the single factor experiments, in which made the leaching rate of copper reach 87.7% markedly.
On account of complex ore properties, high oxidation rate and large amount of slime, it is very difficult to treat by traditional flotation process.
Online since: September 2013
Authors: Yu Ting Chen, Ming Cheng, Jian Zhong Zhang, Chuan Guo Wu
Abstract.A common source of noise is operational excitations of mechanical devices, which cause vibrations and thus sound radiation from their surfaces.
Vibration excitation of mechanical devices can cause sound radiation from their surface.
This method can be rather ineffective in the free-field control applications or large enclosures, since it does not affect the origination of sound and thus requires a large number of anti-noise source [1].
Table 1 PiezoelectricCeramic Actuator Specifications Type P5-H Size(mm) Φ60×Φ12×5.5 Resonant frequency Fs(KHz) 28.1 Electro-mechanical coupling factor Kp 0.5524 Resonant impedance FR(Ω) 20 Shunt Capacitance Co (PF) 19.37 piezoelectric constant d33 680 One of the advantages of this PCA is that more force can be provided by cascading multiple piezoelectric ceramic elements, as shown in Fig.2.
Table 1 shows the parameters which represent the PCA properties in this paper.
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