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Online since: September 2018
Authors: Kempannagari Anantha Kumar, Vangala Sugunamma, Bujula Ramadevi
Further, we analyzed the impact of same parameters on friction factor, local Nusselt number and the rate of mass transfer coefficients and presented in table.
Owing to this property, they have immense applications in mechanical engineering, pharmaceutics, geophysics and industries like making of semi-conductor materials, geothermal redemption and freezing of magma etc.
The Friction factor and the rate of mass transfer coefficients are not influenced by thermal relaxation parameter and irregular heat source/sink parameters.
The elevating values of Weissenberg number diminishes the rate of mass transfer coefficients, raises the friction factor but the Nusselt number is not affected.
The density of the motile microorganisms diminishes with raise in the values of Peclet number and bio convection Lewis number and they do not affect the remaining three quantities.
Online since: June 2015
Authors: Yun Song, Xiao Peng Li, Wei Wang
However, due to the absence of a systematic indicators system integrating with the market and the lack of quantitative assessment on environmental benefits and social benefits, the function of market risk assessment in the technical utilization projects has been neglected, which leads to the weak market competitiveness of these utilized products and the increasing barriers on industrialization of these technologies.Based on these, this study intend to establish both a technical evaluation system and a comprehensive evaluation model, based on the economic, technical, social, environmental and policy factors which could provide necessary technical support for the recycling of nonmetallic material of WPCBS in China.
Physical recycling is to obtain nonmetallic regrind at different strength levels with such processes as mechanical grinding, screening and separation and apply the regrind to different products according to different particle size[6].
No matter the physical method or the chemical method is adopted to recycle nonmetallic materials, recycling technology significantly affects it.
Existing technology evaluation at home and abroad through the interaction between analytic technique and various relevant factors (ecological environment, social politics and substance economy), and therefore, the commonly used technology evaluation methods may be classified into expert scoring method, economic evaluation method, operation research evaluation and comprehensive evaluation method[7-15].
Methods for the measurement and calculation in the evaluation are mainly growth rate equation, direct statistics of technology project benefit as well as effect of technology progress on economic growth and analytic hierarchy process [16].Technology progress, specially referring to the proportion of technology progress factors in growth rate of output value of enterprises, is an comprehensive index which reflects the effect of technology progress on economic growth.
Online since: July 2024
Authors: Abu Seman Anasyida, Taiwo Ebenezer Abioye, Augusta Ijeoma Ekpemogu, Tunde Isaac Ogedengbe, Chloe Rose Cunningham, Rotimi Obolo
Table 3 summarizes the literature on WAAM of 7xxx series aluminum alloys, defects, and mechanical properties.
Summary of some wire arc additive manufactured 7xxx series aluminium alloys, defects and mechanical properties     Defects     Alloy System WAAM Process Porosity Cracks Loss of Volatile Element Resulting Mechanical Properties Ref.
Sun, Wire arc additive manufacturing of Al-Zn-Mg-Cu Alloy: microstructures and mechanical properties.
Ding, Microstructure and mechanical properties of double-wire + arc additively manufactured Al-Cu-Mg alloys.
Chen, Microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by wire + arc additive manufacturing.
Online since: February 2006
Authors: Michael F. Zaeh, Andreas Trautmann
The welding process itself induces a heat affected zone (HAZ) in the material.
The independency of control is however a critical enabling factor for the prevention of finish craters of aluminum fusion weld seam, as described below.
Fig.1: HPDL power and vf versus width Yet deep penetration welding is a critical deciding factor to avoid the 'kissing bond' phenomenon in aluminum welds.
See Table 1. 2,0 2,5 3,0 3,5 4,0 4,5 5,0 2000 2200 2400 2600 2800 3000 0 1 2 3 4 5 6 width w mm PHPDL W vf m/min 0 1,5 2,0 2,5 3,0 3,5 4,0 5,0 6,0 Material Property Al Al2O3 Melting Temperature [°C] 660 2054 Vaporisation Temperature [°C] 2060 ©/© Thermal Conductivity [W m -1 K -1] 230 6.3 - 30 Density [g cm -3] 2.7 3.9 Table 1: Material Properties In addition the thermal conductivity of Al2O3 is below that of pure aluminum.
Porosity is detriment to the mechanical properties of the seam in quasi-static tensile as well as dynamical loading.
Online since: August 2004
Authors: Toshimitsu Baba, Kazuhiro Ogawa, Tetsuo Shoji, Mikiko Suzuki
The high-frequency current that flows through a transmission line is dependent on the shape of the specimen and on the electromagnetic physical properties.
Moreover, by virtue of the property that ceramic materials pass current at high frequency, this technique can even be applied to a non-conductive material like ceramics.
Moreover, the signal characteristics of high frequency transmission lines are dependent on the physical properties of the dielectric between the conductive materials.
Measurement result of the fatigue crack in paramagnetic material Title of Publication (to be inserted by the publisher) depends not only on the depth of the fatigue crack, but is affected by other factors, such as the opening width of the crack, dents, etc.
Sato: Transaction of the Japan Society of Mechanical Engneering (A) Vol.65 (1999), pp.925-931
Online since: December 2022
Authors: Maheera Mohamad, Nor Hasni Osman, Mohd Kamarul Irwan Abdul Rahim, Ismail Abustan, Kamarudin Samuding, Siti Nor Farhana Zakaria, Falah Abu, Mohd Remy Rozainy Mohd Arif Zainol
Characterization of soil samples included the determination of several basic properties, physicochemical properties and geotechnical properties of samples.
Soil samples 2) Physico-chemical Properties Physico-chemical properties of the laterite soil were determined.
Basic properties of the soil samples as according to the British Standard BS 1377 Method [11] are shown in Table 1.
FTIR spectrums of soil Geotechnical Properties Compaction is a process of increasing soil density and removing air, usually by mechanical means.
Ramli, Properties of laterite soils from sources near Nibong Tebal, Malaysia, Comput.
Online since: August 2004
Authors: Laurent Antoni
Degradation of fuel cell performance occurs over a period of time and is related to the deterioration of material properties and interfacial reactions between the different fuel cell components.
Among them, we could mention : the slow warm-up making any short term cycling conditions complicated, the required thermo-mechanical properties of the materials, the assembling and the problems of gas leakage, in particular in planar SOFCs, to which this paper will be restricted.
The cathode must exhibit comparable properties.
And it has been shown that LSC coating on Ducrolloy reduced the Cr volatilization rate by a factor 100 at 950°C [74].
A main advantage of glass seals is that the glass composition can be tailored to optimize physical properties such as the TEC to avoid stress due the thermal expansion mismatch with adjacent components.
Online since: September 2013
Authors: Tian Yin Huang, Rong Wang, Wei Wu, Feng Liu
The stability of the microbial system was efficient in stabilizing nitrification. 1 Introduction Biofilm is a living, continuously renewing community of one or several bacterial species attached to biogenous or abiogenous substrates and surrounded by a polymeric matrix, which protects them from damaging effects of the environment and serves as a factor of intercellular communication[1].
The SS concentration in the influent of SCB is very low, which barely allows the startup phase to affect the removal efficiency.
This occurs because the biofilm on the suspended filler is porous and has strong adsorption properties[19].
[6] Hai-Yan Li , Ye-Qiang Tan, Lu Zhang, Bio-filler from waste shellfish shell: Preparation, characterization, and its effect on the mechanical properties on polypropylene composites, Journal of Hazardous Materials 217-218 (2012) 256-262
[7] Mohammad Reza Saeb, Hadi Ramezani-Dakhel, Raha Sarami, Improving Thermo-mechanical Properties of Styrene Butadiene RubberNanocomposites Using Eggshell Bio-filler, 2010 Fourth International Conference on Quantum, Nano and Micro Technologies, 10-13
Online since: October 2016
Authors: Blazej Poplawski, Łukasz Jankowski, Cezary Graczykowski
Introduction Recently, considerable research has been focused on semi-active control in structural and mechanical engineering [1].
The common factor that differentiates semi-active control from fully active, as well as passive, systems is the paradigm of smart self-adaptivity.
Frame material is a steel with basic properties used in engineering: density ρ = 7850 [kg/m3], Young modulus E = 2e11 [Pa].
Szolc, On the semi-active control method for torsional vibrations in electro-mechanical systems by means of rotary actuators with a magneto-rheological fluid, J Theor Appl Mech 51 (2013) 979-992
[12] L.Gaul, R.Nitsche, The role of friction in mechanical joints.
Online since: February 2011
Authors: Aleksandra Lobnik, Špela Korent Urek
Nanomaterials exhibit highly tunable size- and shape-dependent chemical and physical properties, show unique surface chemistry, thermal and electrical properties, high surface area and large pore volume per mass unit area.
By being able to fabricate and control the size, morphology and surface characteristics of nanoparticles, it could be possible to influence the resulting properties and, ultimately, design materials to give desired properties.
It is obvious that the matrix is affecting the sensitivity of the indicator dye.
Nanomaterials exhibit highly tunable size- and shape-dependent chemical and physical properties, show unique surface chemistry, thermal and electrical properties, high surface area and large pore volume per mass unit area.
Although the zero dimensional materials are applied in sensor design, the factors, such as matrix, indicator and immobilization technique still need to be considered in order to achieve the desired sensor’s characteristics.
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