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Online since: March 2016
Authors: Z.M. Zabidi, N.F.M. Sahapini, Ahmad Nazib Alias, Mohd Ashmir Yahya
This revealed that the compositions of PEDOT:PSS influence the optical properties of hybrid PEDOT-PSS:PANi thin film.
This is due to the physical properties of polymers that have high resistivity and dielectric properties.
A conjugated polymer such as PEDOT:PSS has a unique mechanical, electronic and optical properties and recently been used as a material for several technology and commercial application such as sensors, memories, solar cells and light-emitting diodes (LEDs) [4].
PANi (polyaniline) is non-conjugated conducting polymer that has excellent physical and chemical properties, it can be prepared as a conductor, insulator and semiconductor with a colorable properties [6].
PANi received much attention due to its high electrochemical, optical properties and environmental stability.
Online since: December 2010
Authors: Qiang Song
Data fusion for MFL signal characterization Qiang Song College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing, China songqiang@cup.edu.cn Keywords: magnetic flux leakage, data fusion, characterization, radial basis function network Abstract.
There are a variety of factors that can affect the MFL inspection tool’s ability to detect and characterize anomalies.
They include the MFL tool itself, defect geometry, magnetic properties and test parameters such as velocity and stress.
Online since: January 2008
Authors: Bo Young Hur, M. J. Jeong, In Young Jung, Chang Hwan Seo
Introduction Recently foamed metal has become an attractive material, which has unique physical, thermal, acoustic, damping and mechanical properties [1].
The most effective factor, viscosity is determined by the stirring time, exposing time to contact melt with air, the amount of additives and temperature.
However, this study was carried out fixed viscosity factor except temperature.
The most important effect of the formability is the viscosity which is affected on the amount of formation of the aluminum oxide.
Online since: May 2025
Authors: Anna Horakova, Iva Broukalova, Alena Kohoutkova
The durability of the structure is also considered as it significantly affects its overall environmental footprint.
However, it is necessary to compare mixtures with similar mechanical properties.
When used in a structure, concrete with better mechanical properties can reduce the dimensions of load-bearing elements, leading to material savings that may offset the higher environmental impact associated with higher-performance concrete.
For each remaining design option, the values of the impact category indicators are calculated, considering factors such as global warming and climate change, environmental acidification and eutrophication, stratospheric ozone depletion, photo-oxidant formation, and the depletion of mineral and fossil resources.
Some environmental impacts, such as stratospheric ozone depletion or mineral resource depletion, are only slightly or not at all affected by transport distance.
Online since: October 2011
Authors: Hong Wei Wei, Xiao Li Yang, Ze Hong Yu
As buried structures, a variety of factors influence the soil pressures on culverts.
In spite of the fact that they have potential values, the determination of loadings on culverts associated with a variety of influencing factors in designs still confronts many difficulties, a simple approach which uses the weight of soil column on a culvert as loading has to be widely applied in most designs.
Previous researches have shown that the primary factors influencing the load on structure are governed by the magnitude and direction of settlement of soil prism above the top of the culvert relative to settlements of the adjacent soil prisms.
The fluctuation of earth pressure coefficient in Fig.2 was mainly attributed to the heterogeneity of physical and mechanical properties of filling in the actual construction process, however, the results still has an useful engineering meaning in this field experiment.
Comparison of Finite Element Modeling with the Experiment Results In order to assess the validity of the soil modeling technique adopted in this study, an example that the dimensions and material properties were equal to that in the field experiment was analyzed.
Online since: March 2015
Authors: Zhao Xia Hu, Dong Qin Ran, Jiang Tao Li, Shou Wen Chen
There are many factors that influence the performance of MFCs including bacteria, electrode materials, operation parameters (such as pH, temperature, and energy sources), and the separators in the dual-chamber reactors.
SPAES membranes have been considered promising candidates because of their good mechanical properties, high proton exchange capacity and performances for fuel cell applications.
Results and discussion Effect of IEC on the performance of MFCs Table 1 shows the properties of SPAES membranes and the performance of MFCs.
Properties of SPAES membranes and the performance of MFCs Code OCV [mV] Pmax [W/m3] Rext [Ω] Rint [Ω] σ [mS/cm] IEC [mmol/g] Cal.
Wang, Preparation and properties of crosslinked multiblock sulfonated poly(arylene ether sulfone) membranes for fuel cell applications, Journal of Applied Polymer Science. 121 (2011) 1707-1716
Online since: June 2012
Authors: Bin Zhang
When, the safety factor can be regardless under constant amplitude stress.
Thus, the equivalent stressunder variable amplitude stress can be expressed by: (5) Form the aforementioned equation of the equivalent stress, the strength criterion under variable amplitude stress can be expressed by: (6) whichis the safety factor during work andis the allowable safety factor.
(2) The fatigue strength of a wheel is affected by the effective stress concentration factor at the dangerous point and the size factor of the wheel markedly.
Journal of Mechanical Strength, Vol. 24(2002), p. 617-619 [2] H.C.
Liu: The Assay and Evaluation of Bending Fatigue Properties of Aluminum Alloy Wheel [J].
Online since: October 2010
Authors: Fu Heng Tan, Jian Ling Wang, Xiu Wei Sun
Influencing factors and prevention methods for defects White pattern (foam pattern) Foam pattern is the key to the success of EPC, and the filling process of expanded beads is one of the key processes to obtain high-quality foam pattern.
White area process accounts for 70% in all influence factors of the whole process.
High heat-insulating and adiabatic properties are required to prevent defects of cold shut and misrun.
The degradation products pass through the coating into the dry sand, which affect the filling capability of melted Al alloy.
Guangdong Science and Technology Press, Guangzhou CHN (2005) Fund project: Tangshan Technology Bureau Author Introduction:Jianling Wang (1962- ), Female, Professor, Department of Electro-mechanical Engineering, Tangshan College, Tangshan 063600, China, Tel:15133911121, E-mail: tsswjl2008@163.com
Online since: May 2015
Authors: Františka Pešlová, Daniela Koštialiková, Luba Hajdúchová, Mariana Janeková, Stanislav Krum, Michaela Ďurovcová, Adriána Pavúčková
Krasku 491/30, 020 01 Púchov, Slovakia 2Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Materials Engineering-ICDAM, Karlovo nam. 13, 121 32 Prague 2, Czech republic afrantiska.peslova@fpt.tnuni.sk, badriana.pavuckova@gmail.com, cfedorova.michala@gmail.com, dluba.hajduchova@fpt.tnuni.sk, emariana.janekova@fpt.tnuni.sk, fdaniela.kostialikova@fpt.tnuni.sk, gstanislav.krum@fs.cvut.cz Keywords: machine needles, brittle fracture, degradation of the structure, adhesion.
Therefore, this study focuses on individual parts of sewing needle that may affect the quality of the stitch and final product as well [1].
Surface treatment provides needles with required properties prolonging their lifetime and stitch quality [2].
Limit state is influenced by different internal and external factors [3].
Reciprocal combination of these factors may lead to cumulative limit states reflecting in subsequent degradation of machine needles: plastic deformation, elastic instability, fatigue crack, fracture caused by corrosion under stress, brittle fracture, warm fracture, wear.
Online since: January 2013
Authors: Sang Ho Lee, Shin Taek Jeong, Hong Yeon Cho, Dong Hui Ko
It can be seen that the final kernel functions were less affected.
Recently, with the introduction of probability concepts in the design of coastal structures, the probability density function (PDF) of the tidal elevation has considered as a very important design factor [1].
In this case, the PDF of tidal elevation is a very important factor for the ecological analysis of the flooding and exposure times that determine the habitation zones in the intertidal zone [2,3,4,5].
A change of sea level from climate change, may affect the coastal zone [6].
Therefore, when it comes to judging the statistical property of tidal data the reliability design under the assumption that tidal elevation data is considered to have a normal distribution, the assessment may include the error.
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