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Online since: April 2011
Authors: Tugrul Özel, Durul Ulutan, Mohammad Sima
Specifically, Ti-6Al-4V alloy is the most suitable because it offers favorable mechanical characteristics such as high strength-to-weight ratio, toughness, superb corrosion resistance and bio-compatibility.
Mechanical and thermo-physical properties of titanium Ti-6Al-4V alloy and IN718 nickel alloy are defined as temperature-dependent (T in ºC).
At the rake face, friction factor decreases with increasing ratio of uncut chip thickness (tu) to edge radius (rb) and increasing cutting speed (vc).
Ti-6Al-4V IN718 WC/Co E(T) 0.7412*T+113375 -61000*T+278000 5.6*105 α(T) 3.10-9*T+7.10-6 10-5*e0.0849*T 4.7*10-6 l(T) 7.039*e 0.0011*T 10.409*e0.0903*T 55 cp(T) 2.24*e 0.0007*T 418.63*e0.0433*T 0.0005*T+2.07 Table 3: Properties of work and tool materials.
Increased cutting speed from 55 to 90 m/min tends to make the residual stresses more compressive and friction coefficient on the flank wear land tends to affect axial stress moderately.
Online since: November 2012
Authors: Fa Wang Zhang, Jian Kang Zhang, Yan Pei Cheng
The key to the multi-factors evaluation relies on selection and impact of determining the weights as calculated: (1) Where standing for the total score of land consolidation site; indicating the weight of the indicators to determine the weights of evaluation indexes by way of pair-wise comparison method; indicating the standard value of the indicators. 1.2 Trial plot The trial plot is located at Wangyangxing Village, Zaoqiang county of Hengshui City.
After infiltration, moisture loss fast and mechanical dispersion is strong.
Flooding irrigation supplies large amount of seepage, soil moisture content is lower than cotton needs before irrigation, and after irrigation, water content in 0 cm ~ 60 cm is close to or more than the field capacity, so that the variation may affect cotton growth.
Intellectual Property Publishing House,2010.
(In Chinese) [6] Yu Liu,Ji Huang,Jinxia Wang, Decisive Factors on Agricultural Water-saving Technology Application—The Case Study Based on 10Provinces in China [J].
Online since: September 2023
Authors: Theddeus Tochukwu Akano, Kenneth Chukwudi Ochulor
This develops a geologic image of the interest area, computes distributions of static reservoir properties like rock permeability and porosity, and combines these results to build a sophisticated reservoir simulation model [1].
This method has recently been used to forecast oil output based on geological factors like water saturation, permeability and porosity.
However, because the interactions among the factors are complicated, the prediction procedure is laborious and costly.
The main control factors of heavy oil production in different recovery methods using the Apriori algorithm were analysed by Qin et al. [22].
The model is more affected by the input layer with the highest weight.
Online since: October 2017
Authors: Fatemeh Kalantari, Osman Mohd Tahir, Ahmad Mahmoudi Lahijani, Shahaboddin Kalantari
In this study, technology as one of the important factor of Vertical farming is discussed and reviewed by qualitative approach.
For an instant as to supply 15000 people with food, this high-rise building is designed with these properties: size of the vertical farm: 93 ha (about the size of a block), 37 floors, 25 of which are just for producing crops and 3 for aquaculture.
Knowing about the amounts of crops to be produced as well as probable diseases significantly affect the creation of a healthy environment for growing food preventing diseases.
Considering the influence of buildings on the reduction of energy consumption which negatively affects the environment, a number of strategies exist such as: ‘reduced energy needs’, ‘increased energy efficiency’ as well as ‘passive design techniques applied’.
Rafeeu, “A review on factors for maximizing solar fraction under wet climate environment in Malaysia,” Renew.
Online since: June 2012
Authors: Yukio Watanabe
The properties of ferroelectricity and magnetism are unique cooperative phenomena, the properties of which in finite size are influenced by the field created by themselves.
Table 1 Factors determining the static properties of ferroelectrics in the conventional and present theory.
Conventional theories Present theory Static properties, e.g., Q properties of ferroelectric properties of whole heterostructure, e.g., lI, Egf,..
Dynamic properties, e.g., P-E properties of ferroelectric same as conventional theories Main force for controlling phase electric field, mechanical strain mechanical strain Depolarization field instability significant secondary (in not-too-thin films) Models for electrostatic problems heterostructure is secondary defined by heterostructure This result indicates that properties of ferroelectrics can only be determined by the heterostructure if it is used in a heterostructure.
Although the drastic change of static properties of ferroelectric, which agrees with experiments, is predicted by the present theory, all these results are for static properties with thickness of ferroelectrics not too thin.
Online since: March 2019
Authors: Nurul Aida Sulaiman, Soraya Nanis Hamdan, Norin Zamiah Kassim Shaari
Thin film composite membrane is one of the types of membrane filtration that composed of two layers bonded together so that it can withstand the mechanical stresses generated by the operating conditions [9].
The chitosan has been claimed as unique because of its properties as chelating agent and its ability to absorb various organic compound including heavy metals effectively [1].
Polysulfone membrane, which is prepared by phase-inversion provides a mechanical support to the thin layer, which does not affect the separation performance [10].
For vial B and D, the reading was multiplied by each dilution factor respectively. 2.2.1.3 Total Suspended Solid (TSS) The TSS test was conducted according to standard method ASTM D5907-13 [13].
However, it could be compensated with the good mechanical strength of Membrane B [14].
Online since: October 2015
Authors: Mark Jermy, Tze How New, Tim Flint, Wei Hua Ho
Validated Unsteady Computational Fluid Dynamic Analysis of an Oscillating Bio-Inspired Airfoil Tim Flint1,a *, Wei Hua Ho2,b , Tze How New3,c and Mark Jermy1,d 1 Mechanical Engineering Department, University of Canterbury, New Zealand 2 Department of Mechanical and Industrial Engineering, University of South Africa, South Africa 3 School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore atimjflint@gmail.com, *bhowh@unisa.ac.za, cdthnew@ntu.edu.sg, dmark.jermy@canterbury.ac.nz Keywords: Computational Fluid Dynamics; Particle Image Velocimetry; Oscillating Airfoil; Bio-Inspired Airfoil.
The main factor contributing to the dragonfly’s ability is the presence of four independently controlled wings.
The present study aims to provide insight into the characteristics of viscous flows forming around oscillating airfoil and how corrugations similar to those seen on dragonfly wings affect their unsteady aerodynamic properties.
Online since: September 2010
Authors: David K. Aspinwall, J.B. Saedon, Sein Leung Soo
Aspinwall1,c 1Machining Research Group, School of Mechanical Engineering, University Of Birmingham, Edgbaston, Birmingham, United Kingdom. 2 Faculty of Mechanical Engineering, Universiti Teknologi MARA, Malaysia.
Up until the 1980's, the machining of components for the watch industry represented the majority of application work in microscale mechanical machining, however this essentially involved 2 - 2.5D components/features.
The papers focus on a number of process characteristics which affect cutting at the microscale level and which are raised by other researchers, namely tool edge radius effects in relation to the undeformed chip thickness, workpiece grain size/microstructural effects and the mechanism of cutting (ploughing/rubbing vs. shearing) with consequent effects on built up edge (BUE) formation, cutting forces, tool wear, workpiece surface roughness and burr formation.
Anticipated reasons for this relate to the level of coating adhesion and the fact that oxidation performance is unlikely to be a significant factor.
Machining processes such as micro EDM and particularly micro end milling offer the potential to produce complex 3D components, the latter without restrictions on workpiece electrical properties but subject to the adverse effects of tool wear, cutting forces etc.
Online since: October 2013
Authors: Peng Jia
In order to investigate and ameliorate the machinability of glass, and achieve optical parts with the satisfied surface quality and dimensional accuracy, this paper first conducted SF6 indentation experiment by Vickers microhardness instrument, and then the scratching tests with increasing depths of cut were conducted on glass SF6 to evaluate the influence of the cutting fluid properties on the machinability of glass.
Glass is brittle, although high hardness and high brittleness make the machining of glasses relatively difficult, the demand for precision parts made from them has risen at a very fast rate primarily because of other superior physical, mechanical, optical or electronic properties [2].
The roughness Ra of mechanical polishing sample surface is 12nm, and no cracks and fragments on the specimen surface were observed with optical microscope.
Online since: January 2012
Authors: Hui Luo, Rui Xiong Hu, Ai Dong Liu
The Functions of Business Management Fayol business activities will be divided into technical activities (production, manufacturing, processing), commercial activities (buy, sell, exchange), Financial activities (to raise and appropriate use of capital), accounting activities (business conditions and the evelopment of visual expression - property, inventory, balance sheet, costs, statistics), security activities protection of property and personnel), management activities (planning, organizing, directing, coordination and control).
Political and Economic Impact on Businesses Businesses Land and population is the primary factor in the national economy, measured in monetary value created by labor and land as the true form of surplus value.
In addition to profits, entrepreneurs, political leadership and political vision to become a key factor.
Lewin stressed field theory, group dynamics, floor elements affect each other.
China's Urban Management Application Innovation Park, property networking through information communication technology ICT, intelligent sensor networks (RFID, mobile devices, PLC, location tracking systems, environmental sensors), began to develop in various places.
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