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Online since: November 2019
Authors: Naser Ali, Joao Amaral Teixeira, Abdulmajid Addali
In addition, the performance of the plate HE has been known to depend on a number of factors, including, plate structural design, surface characteristics, liquid properties, etc.
Water properties measurements and theoretical calculation.
Addali, A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties, J.
Lee, Contact angle and wetting properties, Springer Series in Surface Sciences, 51 (2013) 34
Wortman, Relationships between residual stress, microstructure and mechanical properties of electron beam–physical vapor deposition thermal barrier coatings, Surface and Coatings Technology, 108-109 (1998) 80-85
Online since: October 2013
Authors: Wei Feng Liu, Shao An Cheng
The efficiency of this process is directly determined by the physicochemical properties of the anode surface.
Recently, ultrasonic irradiation has been used for modifying the mechanical, physical, and chemical properties of many materials.
Therefore, in this work we attempt to employ ultrasonic irradiation to modify the surface properties of carbon cloth anode.
The electron transfer properties of the anodes before and after treatments were also evaluated by cyclic voltammetry.
The anode is a crucial factor determining the bioelectrical properties of MFCs, since it directly affects the electron transfer efficiency and biofilm formation.
Online since: January 2021
Authors: Ying Ning Hu, Cheng Yong Wang, Shan Shan Hu, Li Ang He
Introduction Diamond circular saw blade is widely used in the processing of metal and non-metal brittle materials in mechanical and construction industries, such as the applications in the natural stone sawing processing, high-speed pavement expansion joint cutting, cement and asphalt concrete pavement maintenance and other aspects.
More importantly, the deformation of the saw blade dramatically affects the processing stability and quality, and accelerates the wear of diamond tools.
Zhang [11] analyzed the reliability of the diamond saw blades based on ANSYS using Monte Carlo method, and found the cutting force along the cutting direction had the maximum impact on the dangerous part of the diamond saw blade, the second factor was the diameter of the blade.
Bin Zeng [15] put forward an innovative 51CrV4 as a novel welded saw blade steel to improve the properties of the existing saw blade steel.
As a result, the working process of saw blade actually contains a complex periodic dynamic load, thermal stress, fluid power (air flow, cooling fluid flow, chips flow) and the heat transfer, the failure of the saw blade is the result of the time effect accumulation of dynamic factors, specifically, the stress and deformation are essentially the result of repeated loading.
Online since: February 2014
Authors: Wei Qun Liu, Ting Song, Yu Shou Li, Shu Fei Zheng, Jing Yang
Introduction The crude strata stress without geotechnical excavation, or the initial in-situ stress plays an important role in engineering analysis, because it not only affects mechanical properties of rock mass, but also directly causes the deformation and destruction.
We took a group of boundary load factors as the training samples.
Online since: September 2014
Authors: Dan Xiao, Yan Hong Ke, Yi Ju Yang, Lei Liu, Yang Yu Yuan, Cheng Bo Yu
The software provides good interactive interface and graphics display surface, but also sets aside network port as follow-platform extension. 0 Introduction Extensively developing microsurgical techniques in the medical field of ophthalmology (such as cataract, intraocular lens implantation , glaucoma , corneal transplants , radial keratotomy and LASIK, etc. ) , because the operative mechanical injury or the toxic effects of drugs may cause corneal endothelial damage, therefore measurement of corneal endothelial cell number, density , shape, etc. is significant before and after surgery.
Initially using a traditional manual cell counting method of examination, it not only takes a lot of manpower and time, and in terms of efficiency and accuracy count vulnerable restricts human subjective factors [1].
(a) Endothelial analysis system programming (b) Image processing algorithm Fig.3 Endothelial analysis system flowcharts The purpose of image segmentation is to extract the cell borders, achieving the separation of background and foreground, which image segmentation directly affects the subsequent edge detection.
H1=, H2= H1 obeys the statistical properties of the Gaussian distribution, and the value between 0 to 1 in the mask.
Online since: March 2016
Authors: Guo Jin Xu, Yong Jun Li, Xiao Yong Wan, Zhao Chong Ding, Jin Jiang He, Jun Feng Luo
Under the action of magneto mechanical effect, magnetic domain shifted and rotated directionally and irreversibly, and the original disorder magnetic domain became a partially ordered arrangement.
Fig. 7 Effect of thickness on PTF Conclusion Based on the investigation, it shows that magnetic property of ferromagnetic materials is affected by many factors, such as grain orientation, internal stress, dislocation, and thickness.
Liu, The influence of the residual stress on magnetic property of soft magnetic materials, Hangkong Bingqi. (2004) 28-31
Online since: June 2010
Authors: Yong Xiang Zhao, Lian You Yu
Performances of cast steels are highly relative to fabrication technologies, e.g. the air cavities shapes and sizes were greatly affected by the cast cooling velocity and the wear resistance of high Cr cast steel was mostly relative to the austenite content [5].
Mechanical properties are around 188 GPa for Young's modulus, 254 MPa 0.2% proof strength, 453 MPa ultimate tensile strength, 26 % elongation, and 45 % reduction of area.
Table 2 Statistical parameters sa,av, sa,rms, and ns for present material by CA, DMA, ZKA and MLA Parameter CA DMA ZKA MLA sa,av (MPa) 139.27 139.23 138.86 138.25 sa,rms (MPa) 3.0399 3.2479 6.1562 2.5723 ns 6 6 7 6 When the statistical parameters sa,av, sa,rms, and ns are available, probability density function (pdf), f(sa), failure rate function (frf),λ(sa), and cumulative distribution function (cdf), P(sa), for fatigue limit can be expressed as, respectively ( )s rmsa, a ,1, 2 1 )( nCPks sf −' = π ( )                 −' − − rmsa,s ava,a ,1,2 1 exp snCPk ss (7) ( ) ( ) ( )a a a -1 sP sf s =λ (8) ( ) ∫∞ −' = a s rmsa, a ,1, 2 1 )( s nCPks sP π ( ) a 2 rmsa,s ava,a d ,1,2 1 exp s snCPk ss                 −' − − (9) where k'(P, 1-C, ns) is an equivalent factor with respect to the synthetic coefficient, k(P, 1-C, ns), with a consideration of single
The factor and coefficient are defined, respectively ( ) ( ) P CZ nt nCPk 1 1,1, s1 s − +=−' − ; ( ) ( )1 ,1, s1 s −+=− − ntZnCPk CP (10) The probabilistic measurements of fatigue limits at arbitory P-C levels can be evaluated using the equation below ( ) rmsa,s ava, a ,1, snCPkZss P CP −'−=− (11) By the above measurement method, the pdf curves of fatigue limit for the present material are exhibited in Fig. 4.
Online since: June 2010
Authors: Vanessa K. Peterson, Cormac Corr, Gordon J. Kearley, Roderick Boswell, Zunbeltz Izaola
This method does not provide easy alteration to the microstructural and chemical composition of the polymer, factors which affect the PEM performance.
Little work has been reported on transport properties of plasma polymers and substantial research and development is required to make plasma polymer membranes commercially competitive with other available materials produced by wet chemical processes.
In the polymerisation of styrene for fuel-cell membranes, the cross-linking has a strong impact on the membrane performance, increasing the mechanical strength and the chemical stability, and decreasing the swelling and toughness.
Online since: June 2012
Authors: Ke Kuan Wang, Bin Long, Ming Zhu Liu, Bin Jie Zhao, De Yu Tang
Although this method can meet the quality requirements of the pipe surface cleaning, but the construction is extremely inefficient, and not recycled due to the spit of sand feed pipe surface, on-site consumption of sand material, resulting in a large waste of raw materials, and the blasting process dust pollution of the environment, but also affect the health of the operatives [1].
Due to the impact and cutting action of abrasive, the mechanical properties of the pipe surface and the fatigue resistance of the pipeline are improved, and increase the adhesion between the pipe surface and the coating ,and extend the durability of the coating, but also conducive to the flow of paint peaceful decorative rid of impurities on the surface, variegated, and the oxide layer at the same time, so that the media surface roughening, reducing the residual stress of the surface of the substrate, increase the hardness of the substrate surface.
Running for some time in normal working condition, there is not destabilizing factors, the run is also very stable, verify correct to load operating conditions.
Online since: July 2007
Authors: Ian Brough, John F. Humphreys, Pete S. Bate, Haruo Nakamichi
Introduction Many mechanical properties of steels are determined by their deformation and annealing history.
In particular, the grain morphology and texture of interstitial free (IF) steels affect their formability under industrial deformation conditions, such as during automobile manufacture.
From the present results, it is not obvious which factors are most important in determining the sequence of events, and further more detailed investigations are required..
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