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Online since: April 2016
Authors: Ibrahim Yakub, Nurul Ain Mohamed Alipah, Khairul Anwar Mohamad Said
The extraction became preferable at 10.0 ml/g solvent/solid ratio where the yield increases until around the 30th minutes and did not experience severe Vitamin C reduction.
It can be seen from both figures that the model fits all experimental data with R-squared values ranging from 0.8 to 0.99.
Table 1 enlists all of the parameters in Ana et al. (2007) model for all selected experimental data.
In fact, according to the Ana et al. (2007) kinetic model that was found to be best-fitted the empirical data, the highest equilibrium concentration of Vitamin C (0.05 g/L) was achieved at 10 ml/g solvent/solid ratio and 60 oC.
Online since: January 2012
Authors: Sudin Izman, Safian Sharif, Norazmein Abdul Raman
RSM is a statistical method which utilizes quantitative data obtained from experiments to determine and simultaneously solve multivariable equations [7].
The cutting forces were measured using a three-component dynamometer coupled with a multichannel charge amplifier and a data acquisition system.
Results and Discussion The main cutting force, Fc data from the milling tests was analysed statistically using ANOVA to confirm the significance of the model and individual terms or factors followed by the measuring of how good is the prediction model.
A reduction in cutting force is observed as spindle speed increased.
Online since: November 2015
Authors: Darren Fraser, S.H. Masood, Afshin Mohammadhosseini, Mahnaz Jahedi
Advancements in medical imaging and image processing have enabled custom design of biomedical implants based on patient specific Computed Tomography (CT) data.
The CT data are edited by especial software and a 3D-model of the joint is created as a Computer Aided Design (CAD) model, which can then be used as the base for the custom designed implant components [2].
The measured profile data were converted to Microsoft Excel format from Mahr software format.
However, for low applied loads, the reduction was not significant.
Online since: May 2015
Authors: Aleksandr Blokhin, Sergey Dobryaev, Aleksandr Plekhov, Vladimir Titov
In this mode, algorithms providing minimum dynamic loads on the transmission elements due to the optimal choice of the coefficient of reduction and time of the clutch work should be tested. 2) The study of the characteristics of the drive motor operating at the friction clutch slipping and the output shaft locking in the automatic transmission control.
The motor parameters are determined by calculation and from the technical data.
Theoretical and experimental research of parameters of the stand On the basis of these data we calculated the matrix of dynamic coefficients and the matrix of control developed a simulation model of the electromechanical complex.
According to the simulation data Fig. 11 shows the dependences ofTHDo.е from the control anglesαiby thecompensatory rectifier valves equal for both groups of the valves [8].
Online since: April 2012
Authors: Bradley P. Wynne, Eric J. Palmiere, K. Muszka, Lin Sun
This helps to minimize the complexity of converting the recorded machine torque and rotation angle data into flow stress and strain.
The EBSD data were collected using a FEI field emission gun scanning electron microscope (FEGSEM) equipped with a HKL Nordlys CCD camera.
HKL Channel 5 software package was used for both data acquisition and analysis.
The possible reason is the reduction of the nucleation sites due to lower dislocation density caused by the strain reversal.
Online since: February 2008
Authors: Walter José Botta Filho, Claudio Shyinti Kiminami, Alberto Moreira Jorge, J.B. Fogagnolo, Claudemiro Bolfarini, M.M. Peres
This combination of material properties offers opportunities in applications where a weight reduction is required while maintaining high strength.
The results from FENA simulations were used to analyze the experimental data and observations, and to identify the optimum extrusion angle and concordance radius required to minimize the evolved tensions and damage while allowing the occurrence of material full densification.
Many researchers assume that the temperature rise during deformation can be neglected; however, the nominally isothermal data reported in the literature are frequently obtained under nearly adiabatic conditions.
Also, it is important to note that all results were carried out from real data output and effects such as redundant work and die shape were imbued in temperature rise calculation.
Online since: March 2007
Authors: Wei Wu, Lin Yang, Li Lin, Li Jia Chen, Hai Tao Ji, Zhen Liu
Introduction Magnesium alloy components equal in strength are 40% lighter than steel and 20% lighter than their aluminium counterparts, which enables car manufacturers to meet regulatory requirements for lighter weight vehicles and a corresponding reduction in emissions.
However, few low-cycle fatigue data are available for this alloy [7], more little explanation of why magnesium alloy is suitable for automobile components under cyclic strain load though some magnesium alloys have been successfully applied in automobile industry.
Low-cycle fatigue life The fatigue life data of plastic, elastic and total strain amplitude vs. reversals to failure (2Nf) are shown in Figs. 4-5.
The fatigue life data can be described in the following conventional equation and displayed very well in terms of Basqin and Manson-Coffin laws as a result of log-log linear regression of the elastic and plastic strain amplitudes in the figure. 222 p e t εεε Δ + Δ = Δ (1) c ff b f f N N E )2(')2( ' ε σ + = (2) where E is Yong's modulus of elasticity, which is equal to about 45GPa for the magnesium alloys; 'fσ and 'fε was called as fatigue strength and ductility coefficients, respectively, whose values have been expressed in Figs.2-3.
Online since: February 2006
Authors: Yvan Houbaert, Kim Verbeken, Bruno C. De Cooman, Jérémie Bouquerel, Joost Van Slycken, Patricia Verleysen
Introduction The requirements for an increased formability and a weight reduction, especially for the automotive industry, have largely contributed to the development of new low alloy TRIP-aided ferrous alloys [1].
The data thus obtained for a single constituent were combined in three successive stages making use of a Gladman-type mixture law.
Eq.1 illustrates the different strengthening effects for a single phase material: thdgSSP σσσσσ +++= , (1) • σP is the intrinsic strength of the material due to the Peierls or lattice friction the dislocations experience when moving on their glide plane; literature data [8] showed that σP has a value of 75 MPa for iron based alloys
Good agreement with experimental data was observed.
Online since: January 2012
Authors: Tarik Bin Alamgir, Muhammad Mahbubur Rashid, Amir Akramin Shafie, Ibrahim Jawad Alfar
The algorithm processes the data received from the Infra Red (IR) and Ultrasonic sensors.
This rule base system is guided by the Fuzzy membership functions generated from the preliminary position and distance data.
The system uses co-ordinate detection algorithm for detections, ultrasonic depth data for distance.
Soffker, “Reduction of complexity for the analysis of human-machine-interaction,” 2009 IEEE International Conference on Systems, Man and Cybernetics, no.
Online since: May 2011
Authors: Jie Sun, Shao Fang Liu, Li Na Yu, Qing Li Yang, Jie Bi, Chu Shu Zhang, Feng Zhu
All of the following data are expressed in dry weight (DW).
Crude fat contents of the corolla (3.72%)and the receptacle (4.75%) were close to data reported in other plants flowers, and most of them were constituted by unsaturated fatty acids.
Copper is an essential component of numerous enzymes that catalyze oxidation-reduction reactions and is required for collagen synthesis and iron mobilization.
The data presented in Table 4 are characterized by a high concentration of unsaturated fatty acids, with a proportion above 68% of total fatty acids.
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