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Online since: October 2010
Authors: Shi Lin Yan, Fei Yan, Zhong Qi Qiu
It consists of mould, a constant flow pump, pressure sensors, and data collection system.
Data collection is collecting the value of pressure of inlet and observation points using pressure sensors, the computer stores information, and calculates out the value of pressure.
When fiber performs are put into the mould and the mould is packed well, we connect the mould with pump, pressure sensors, and data collection system, shown in Fig. 1.
(2) Data processing Subsection method.
Data processing by subsection method reaches the values of permeability of different conditions, then compare and analysis the values of permeability.
Online since: October 2007
Authors: A.A. Shaikh, S.A. Channiwala
The deviation of proposed model is observed under predictive for experimental data available in literature while the experimental results obtained in present work is also found to be on lower side to that of available predictive models from literature.
The void content in the composite plays an important role in governing the strength [5, 13], and hence void content in specimen was also evaluated using data of volume of specimen measured by water displacement technique and constitute properties.
Comparison of Model Predictions for Transverse Fiber Composite with Experimental Data of Gibson [6] Fig 4.
The model proposed adequately represents the experimental data with the deviation of the order 0.90 %.
The comparison of present model with experimental data from literature also reconfirms the same.
Online since: January 2013
Authors: Sreenivasan Jayashree, Govindan Marthandan, Chinnasamy Agamudainambhi Malarvizhi, Gowrie Vinayan
Questionnaire-based survey will be used to obtain information and Structural Equation Modeling will be used to analyze the data.
By minimizing the risk of regulatory and environmental liability fines and improving an organization’s efficiency, leading to a reduction in waste and consumption of resources, operating costs can be reduced (ISO14001.com.au 2010).
The data collected through the questionnaire will be subjected to a number of checks to be performed at various stages to ensure the quality of data and the quality of the data input process.
Development and Validation of critical factors of Environmental Management, Industrial Management & Data Systems, 106(1):96-114.
Online since: October 2011
Authors: Ke Zhang, Shi Chao Chen, Yu Hou Wu, Feng Lu, Song Hua Li
In order to ensure the smooth operation of high-speed spindle and realize the dynamic balance of the spindle, it is necessary to make a rigorous precision testing for the precision-processed spindle and obtain reliable data to meet the design standards and performance requirements of all ceramic high-speed spindle.
The basic principles of the work is through the detection sensor (probe) and the measurement space with the axis of movement, side head system to detect three-dimensional coordinates of points to pass measurement software, and then calculated by the analysis software to complete the measured point (point group) of Analysis of fitting the measured reduction of the final geometric elements, and on this basis to calculate the theoretical value (nominal value) between the deviation in order to complete the work on the part is measured.
First, after the ceramic spindle cleaned the table into the coordinate measuring machine, and the establishment of part coordinate system, then measured to determine the coordinates of the center of the hole position in the automatic measurement system LSP side head data collection and measurement software spread Roundness on the size of the assessment, measured in the collected data, input into the computer for analysis calculation, and output the measurement results.
Through the analysis of testing the roundness error measuring data.
Table 3 Different sectional internal hole cylindricity error measurement section 1 2 3 4 5 cylindricity error 1.8 2.0 1.8 1.4 1.8 Through three coordinates of the cylindricity error analysis of the measuring data, the error can completely satisfy zirconia ceramics spindle design requirements.
Online since: May 2014
Authors: Sergey A. Tipalin, Boris Saprikin, Nikolay Kosatchyov, Nikolay Shpunkin, Pavel A. Petrov, Michael A. Petrov
Commonly investigated problem on composite fabrication and forming for weight reduction in transportation and aerospace area is not completely cleared.
Multilayer materials can solve more problems in area of acoustic insulation (in sense of attenuation coefficient a), vibration insulation, and weight reduction of a construction.
During the deformation the elements in pattern changed their geometry so the deformation intensity at the end of the process could be calculated as follows: (1) and the stress intensity: (2) where A – material constant; n – hardening exponent (based on the data from the stress-strain diagram).
Online since: November 2012
Authors: Yi Heng Lu, Feng Wei, Wei Long Liu
Non-isothermal kinetic data of the membrane were analyzed by using the thermo-gravimetry analysis and the Kissinger, Flynn-Wall-Ozawa and Friedman methods under the conditions of flowing gas nitrogen and the heating rate of 5, 10 and 20˚C /min.
Based on our research about the thermal stability of PEM[5], by means of the TGA technique, we investigated the thermal decomposition kinetics after PEM reacted with Fenton's reagent, The thermal decomposition kinetic data were analyzed by using the Kissinger, Flynn-Wall-Ozawa and Friedman techniques.
When PEM is attacked by higher reactive oxygen free radicals (• OH, • OOH) produced from the electrochemical or chemical reaction of hydrogen and oxygen in the presence of platinum catalysts, hydrogen peroxide is generated from the two-electron oxygen in the cathode reduction, see reaction (a); The oxygen molecules penetrated into the membrane from the cathode to the anode, see reaction (b), (c) and (d); When hydrogen and oxygen exist in the PEM fuel cell membrane, hydrogen peroxide is detected obviously through in situ testing techniques; The hydrogen peroxide is cleavage chemically to the hydroxyl radical assisted by the metal ions such as Fe2+ existing in the membrane.
ln [dα / f (α) dT] = ln (A /β) -E/RT (5) ln [g (α) / T2] = ln (AR / βE) -E/RT (6) Experimental data α, T, dα/dT, respectively, are substituted into the differential equation (5) and integral equation(6), when the linear correlation coefficient is better and the standard deviation is smaller Table 2.
Online since: October 2014
Authors: Rui Jia, Ping Ning, Xue Qian Wang, Lang Lang Wang, Yong Shi, Xiao Long Guo
The experimental data fitted with the prediction model very well and the model may be a worthy reference for the catalytic oxidation process of HCN.
Combined with the existing literature and the experimental data, the kinetics of catalytic oxidation of HCN were discussed.
Fig. 1 The effect of space velocity on catalyst activity Based on Fig1, the conversion rate of HCN decreased rapidly, when the airspeed is higher than 6000 h-1, owning to the contact time reduction between the gas mixture and the catalyst, but the removal rate of HCN is obtained 98%, when the velocity is less than 6000 h-1, proving the results of catalytic reaction are approving.
(1) As former discussed, the reasonable reaction temperature was controlled at 150-250 ℃, To make the concentration of HCN enter into the isothermal tubular reactor was 200 mg/m3, change the space velocity (Q/V) to investigate the anastomotic degree of conversion rate of HCN that predicted values by type 1 and real experimental data.
Online since: March 2020
Authors: Antonio Gilson Barbosa de Lima, Maria José de Figueiredo, Luan Pedro Melo Azerêdo, Francisca Valdeiza de Souza Tavares, Anderson Ferreira Vilela, Atacy Maciel de Melo Cavalcante, Ana Raquel Carmo de Lima
Predicted and experimental data of the average moisture content and the temperature of the product during the drying process are compared and a good concordance was verified.
The parameters c1, c2, k1 and k2 in Equation 5 were determined by fitting to experimental data of average moisture content by [13] (Table 1).
b) The finite-volume method was satisfactory to discretize the governing equations and the predicted results showed good concordance with the experimental data of average moisture content and temperature of the bricks during drying.
c) The air conditions affect the drying and heating kinetics of the ceramic part: lower air temperature and higher air relative humidity in the first 6 hours of process provoke reduction in the drying and heating rate (material dry and heat slowly), and possibly increase brick quality after drying.
Online since: November 2015
Authors: Sławomir Alabrudziński, Mieczysław Poniewski, Krzysztof Płaczkowski, Mirosław Grabowski
The data, in the form of the footage of two-phase flow structures, were subjected to the analysis with the scripts, developed for that purpose in the MathWorks Matlab 2010b environment.
Llb,i = length of the elongated, partially visible bubble (cylinder plus one hemisphere) Cylinder volume: Vc,i=Llb,i-a2πa24 (10) Vlb,i = cylinder volume + hemisphere volume Volume of the elongated bubble (cylinder + hemisphere): Vlb,i= Llb,i-a2πa24+ πa312= πa24 (Llb,i- a6) (11) Void fraction for the large, partially visible bubble is: φlb,i= πa24 (Llb,i- a6)La2= π(Llb,i-a6 )4L (12) Void fraction for large, partially visible bubbles is: φlb= π4Li(Llb,i-a6 ) (13) Measurement Data Analysis Mathworks Matlab 2010b software together with the tool sets, namely Computer System Vision Toolbox and Image Processing Toolbox were used to conduct the photographic analysis of the video footage.
The other set makes it possible to do imaging tasks at the level of individual frames, such as image analysis, object segmentation, image sharpening, noise reduction, geometric transformations, etc.
On the basis of the data and with the use of equations, void fraction in the w mini-channel was calculated.
Online since: March 2024
Authors: Adel Khalid Alfozan
The outcomes of each test have been compared with the data taken without heat treatment, so the ductility increase can be observed.
All of this data was needed to study the changed behavior of magnesium alloys.
It can be seen that furnace cooling gives less reduction in the strength as compared to water quenched specimens.
In order to see how ductility increased, results from each test were compared to data collected without heat treatment.
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