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Online since: December 2012
Authors: Xiao Fang Yuan, Jing Yin Li, Bin Zhang
Their tangential spreading factors both increase obviously with the tangential velocity at the impact point, while their radial spreading factors vary a little.
The liquid properties are summarized in Table 1.
Two spread factors, the tangential spread factor (), and the radial spread factor (), are proposed in this paper.
Figure 6 Effect of surface tension on the evolution of tangential spread factors.
In addition, the tangential spread factors for them increase evidently with the tangential velocity at impact point, however, their radial spread factors varies a little.
Online since: October 2012
Authors: En Xiang Han, Jiang Li, Wei Cong
The band gap of anatase TiO2 is 3.2eV, and the anatase titanium dioxide has excellent resistance to light corrosion and photoelectrochemical properties, so it is widely used in solar cells, photocatalysis and photolysis of water into hydrogen and other fields.
In this article, TiO2 nanotubes are prepared by the method of anodic oxidation[4~6] .Annealing temperature and other factors on the microstructure and properties of nanotubes will be researched, and then nanotubes will be prepared for solar cell which photoelectric conversion properties will be studied. eventually, the photoelectric conversion of DSSC is 1.53%, open circuit voltage reached 0.734, short -circuit current is 4.52mA, fill factor is 0.460. 2 Experiments 2.1 Preparation and characterization of TiO2 nanotubes Take titanium foil with the thickness of about 0.25mm to be anodized.
Use a syringe to apply a small amount of electrolyte to inject into the holes of the back electrode, and then seal the holes with transparent plastic. 2.3 The measurements of optical and electrical properties Use 100 W xenon lamp as the sunlight simulator which incident light intensity is 100 mW ·cm-2, then measure it at room temperature, get V-I curve, record short-circuit current and open circuit voltage, which are used to calculate the fill factor and photoelectric conversion efficiency with formula.
The film is too thin will limits the absorption of the dye adsorption and photo - carrier, which will affect the photoelectric conversion efficiency of DSSC cells.
Grimes, Visible light photo electrochemical and water-photo electrolysis properties of titanium nanotube arrays," Journal of Photochemistry and Photobiology a-Chemistry, vol.178, 2006,pp. 8-15
Online since: July 2013
Authors: Zuo Cheng Wang, Cai Nian Jing, Fu Tao Han, Xiao Min Liu, Shao Yan Zhang, Jie Su
Considering the effect of lubricating condition on properties, a hot rolling lubricant was used in the experiment.
The annealed Ti-IF steel sheets were cut and machined into the tensile specimens and mechanical properties of specimens were all measured through uniaxial tensile tests.
Results and Discussion Mechanical properties of ferritic hot-rolled Ti-IF steel sheets Table 2 shows the mechanical properties of experimental Ti-IF steel sheets and the corresponding ferritic hot-rolling parameters.
Table 2 Mechanical properties of Ti-IF steel sheets and corresponding ferritic hot-rolling parameters Sample No.
Studies [5-6] had confirmed that texture was the main factor that affected the r-value and deep drawability of IF steel sheets.
Online since: May 2014
Authors: Asnul Hadi Ahmad, Dermot Brabazon, Sumsun Naher
INJECTION TESTS AND EFFECT ON MICROSTRUCTURE AND PROPERTIES OF ALUMINIUM 7075 DIRECT THERMAL METHOD FEEDSTOCK BILLETS A.H.
This was due to solid fraction within material that was found to be one of the foremost factors in determining the success of SSM processing [10].
The transfer time affects the fraction solid within the material.
[3] Brabazon D, Browne DJ, Carr AJ, Mechanical stir casting of aluminium alloys from the mushy state: process, microstructure and mechanical properties.
[13] Liu D, Atkinson HV, Kapranos P, Jirattiticharoean W, Jones H, Microstructural evolution and tensile mechanical properties of thixoformed high performance aluminium alloys.
Online since: November 2012
Authors: Feng Ge Zhang, Guang Hui Du, Tian Yu Wang, Na Huang
Rotor Cooling System Design and Fluid Field Analysis of MW-Level High-Speed Permanent Magnet Motor ZHANG Feng-ge1,a, DU Guang-hui1,b, WANG Tian-yu2,c, HUANG Na1,d 1 School of Electrical Engineering, Shenyang University of Technology, 110870,China 2 College of Mechanical and Engineering, Shenyang Institute of Engineering, 110136,China a zhangfg@sut.edu.cn, b duguanghui1104@163.com, c lnwangtianyu@yahoo.com.cn,dhuangna125@163.com Keywords: high-speed motor; rotor ventilation system; 3D fluid field; CFD Abstract.
These main factors that restrict high-speed motor to large power direction are the small volume, large loss, cooling difficulties, and mechanical properties higher.
If the stator slots of ventilation in the area is very small, it is to say radial ventilation too narrow or slot too big will lead to air volume can't come to duct and air gap place, which will seriously affect the rotor heat dissipation.
So it was unreasonable of thinking about fluid velocity equal before in the ventilation of the ditch. 3) If the radial ventilation too narrow, it will lead to the cold air can't come to axial duct and air gap, which will seriously affect the rotor heat dissipation.
Online since: December 2013
Authors: M. Safuadi, Ahmad K. Ariffin, M. Ridha, S. Fonna, Zebua Zebua, A.R. Daud
Daud2 1Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, National University of Malaysia, 43600 UKM, Bangi, Selangor, Malaysia 2School of Applied Physics, National University of Malaysia, 43600 UKM, Bangi, Selangor, Malaysia 3Department of Mechanical Engineering , Syiah Kuala University, Darussalam, Banda Aceh (23111), Indonesia 4Centre for Automotive Research, Faculty of Engineering and Built Environment, National University of Malaysia, 43600 UKM, Bangi, Selangor, Malaysia asafuadi@yahoo.com, bridha@tdmrc.org, ckamal@eng.ukm.my Keywords: cathodic protection, finite and infinite domain, BEM, submersible pump Abstract.
Cathodic protection is a technique, which uses the electrochemical properties of the metal being protected.
[6] Riemer, D.P. & Orazem, M.E., A Mathematical Model for the Cathodic Protection of Tank Bottoms, Corrosion Science, 47, pp. 849-868 (2004) [7] Metwally, I.A., Al-Mandhari, H.M., Gastli, A., & Nadir, Z., Factors affecting cathodic-protection interference, Engineering Analysis with Boundary Element, 31: pp. 485-493, (2007) [8] O.
Online since: March 2007
Authors: Hermann Riedel, Christophe Poizat, Tom Walde, Rudolf Kawalla, C. Schmidt, A. Prakash
During rolling the typical basal texture develops which is disadvantageous for subsequent processing and leads to anisotropic properties.
After compression tests the specimens' shape was more oval than round (Fig. 1) which is an indication for anisotropic properties already after caliber rolling.
Furthermore it is obvious that the formation of basal texture in magnesium is influenced by several independent factors.
This is to be achieved by varying factors that influence deformation in order to impair the activation of the favored basal gliding mechanisms and to influence twinning with the objective of achieving a reduced basal texture.
The entire model [9] calculates the texture development as a result of deformation and recrystallization, and the resulting anisotropic plastic properties.
Online since: January 2022
Authors: Emmanuel Gourdon, Mohammed Yacine Ferroukhi, Fionn McGregor, Antonin Fabbri, Philippe Glé, Mohamed Said Abbas
For both properties, the type of binder has been found to be the most influential parameter.
Acoustic properties The Kundt’s tube or impedance tube technique was used to determine the acoustic properties of the samples using the 3-microphone no-cavity configuration as described in (Iwase et al., 1998).
The sample is placed inside the tube, next to the rigid backing, and the three microphones allow the determination of the different properties.
The use of pith in the formulation of lightweight bio-based composites : impact on mechanical and hygrothermal properties.
Conditions affecting the moisture buffering measurement performed on compressed earth blocks.
Online since: January 2012
Authors: Shu Feng Jiang
Study Shows With the development of mining technology, more and more members of association rules and the expansion, will be more valuable factors integrated into association rules mining method of association rules, so as to enrich the application domain, widen the scope of management decision support.
Multilevel Association Rules Mining Algorithm The great l presented focus on data attribute weighted structural thought[5], additional properties are in the data set to existing properties is established based on the reaction that local or global features additional properties, improved the main idea of the algorithm is: through the classification process and pitchfork to adjust the attribute weights, each classification error rates of different, weight adjustment is also different.
Using the attribute weights are adjusted data set, the data set is inserted into the symbol vector structural properties attached method to achieve property coverage, to improve the classification accuracy and stratification of the realization of.
On the property, in accordance with the data set of content size associated with each of the 8 properties to establish a local level vector properties, will be the same weights add attributes the same additional attributes, attributes covering and realize the levels of distinction.
For each transaction set a unique ID, each transaction has 1260 properties and 1 judgment, calculated for each transaction item number Item and project code.
Online since: September 2014
Authors: Zhen Dong Fan, Yu Zhi Hu, Huai Zhi Su
This is because the material properties of the dam and dam abutment rock mechanical parameters will change with the passage of time.
The material properties of the dam and dam abutment rock mechanical parameters will change with the passage of time.
We take four pressure factors, expressed as , , and .
We take four temperature factors, expressed as , , and .
We take two aging factors, expressed as and .
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