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Online since: October 2015
Authors: Gheorghe Matache, Valeriu Vilag, Cristian Puscasu, Alexandru Paraschiv, Valeriu Dragan
As such, the scanner can acquire data regarding the texture and color of the scanned object, and also may keep the track of the object in more difficult conditions (due to texture based tracking aid).
The 3D scanning ensures the acquisition of a much larger number of surface points, hence requiring the operator to use a mesh file format (e.g. stereolythographic), which can handle such data.
The necessary time for the surface data acquisition is significantly lower in the case of 3D scanning due to the high degree of automation of the process.
The dimensional inspection results of the as-cast blade allow a comparison between the accuracy of the two methods used for 3D CG data acquisition.
Redarce, A CAD-based 3D data acquisition strategy for inspection, Machine Vision and Applications 2003, 15, 76-91
Online since: December 2014
Authors: Xiong Liang Wang, Chun Ling Wang
Compared with visible light and infrared radiation sensing device, synthetic aperture radar (SAR) have all day, all-weather, long-distance, large-scale, high-resolution and other advantages for ocean front observations provided powerful field data.
The nonlinear nature of the speckle noise, along with certain ambiguities inherent to SAR data, further complicate the analysis of SAR imagery.
As a result, many image analyzing techniques, such as grey-level thresholding and conventional edge detection, are not readily applicable to SAR data.
Another way such as introducing the gravity model to detect ocean fronts based on the ocean temperature data was performed in [9].
The 2D-EMD algorithm may be summarized as follows[12]: (1) input source data X, identify the extreme (both maximum and minimum) in the image space; (2)generate the bounding envelopes using appropriate surface fitting techniques; (3) compute the mean surface by averaging the upper and lower envelopes; (4) determine the first estimate of an IMF by subtracting the mean surface from the input data according to some rule; (5) iterate until the IMF mean surface function is close to zero everywhere, After subtracting IMF from source data X, repeat step (1), the result is as the new input source data; (6) if the residue is a constant or a monotone trend, then stop.
Online since: June 2016
Authors: Nipon Ketjoy, Kobsak Sriprapha, Sarayooth Vaivudh, Nattawut Khaosaad
The reduction of the shunt resistance causes more leakage current in the solar cell, resulting in decreased solar power production.
Data recording for these systems was done during 2005 to 2012 in accordance with IEC 61829 standard [7-8].
Therefore, the field measured data needs to be adjusted to the STC.
Using the arrays data, different relations were developed for various PV cell technologies through the multiple linear regression models.
The Rs & Rsh are from data recorded over 8 years, the collection process was manual which has measured data during the solar irradiance values greater than 700 W/m2 as per IEC 61829 standard [8].
Online since: May 2013
Authors: Zong Gang Wang, Guang Tong Feng, Zhen Wei, Xiu Ju Zhao
By means of developing new rock abrasiveness device and using quenching steel spiral simulation micro-bit, the experimental investigation on rock abrasiveness that simulating the actual drilling surroundings in petroleum engineering had been conducted. based on the data of micro-bit’s wear weight, which broke unit volume rock, of which experimental samples are made from more than 850 cores of seven main geological profiles in Shengli oilfield, rock abrasiveness is divided into eight grades with Sturges empirical formula.
The research of rock abrasiveness in the future could be defined by the result of this paper, and the basic data could be provided to bit manufacturers for bit selection. 2.The rock abrasiveness test The test device The test device of rock abrasiveness which was designed and used in this project is shown in Figure 1.
On the basis of analyzing the experimental data, it was found that the drill depth was shallow when the drillability was more than 5.
(3) Classification method of rock abrasiveness The experimental data had been processed with formula 1, 2 and 3, and then the indexes of rock abrasiveness for different samples are obtained.
Figure4 The relationship between rock abrasiveness index and hardness Figure5 The relationship between rock abrasiveness index and and drillability 5 Conclusions and suggestions (1)The simulation micro-bit has satisfied the simulation which the rock is broken by bit and the bit is worn by the rock because of the spiral structure and quenching steel material, and it is beneficial to analyze the experimental data
Online since: April 2019
Authors: Salah Bensadek, Hakim Aguedal, Abdelkader Iddou, Abdallah Aziz
The breakthrough data obtained for Cr(VI) removal was more adequately described by the Clark and Yan model with high correlation coefficients (R2 = 0,996).
The column data in this study were analyzed according to the breakthrough time, which was obtained by plotting Ce/Ci versus time.
Analysis experimental data are summarized in Table 1: Veff = the volume of the effluent (mL); ttotal = total time in min; Q = flow rate through the column (mL min−1); qtotal = the total mass of Cr(VI) (mg); CR = concentration of metal removal mg L−1; mtot = the total amount of metal ions sent to the column (mg); R= total metal removal (%).
Analysis experimental data Volume of effluent Total Cr(VI) mass Total amount of Cr(VI) Total Cr(VI) removal Veff = Q ttotal qtotal= Q1000t=0ttotalCR dt mtotal = C0 Q ttotal1000 R (%) = qtotalmtotal × 100 Fixed-Bed Modeling.
The study showed that the experimental data best fitted with Yan model than with the Clark model for all the conditions with the regression coefficient (R2) of 0.996.
Online since: June 2011
Authors: Krzysztof Jan Kurzydlowski, J. Bieliński, Anna Boczkowska, R. Kozera, A. Broda
The coating is deposited as the result of the controlled reduction, which is catalysed by the metal being deposited.
The average thickness of the Ni-P coating was calculated using data from chemical analysis or measured on SEM images.
Mass loss of carbon fibres covered with epoxy sizing (roving 6k, roving 3k) after different chemical pretreatments Technical data sheets for the different Tenax fibres [27] indicate that the mass fraction of the epoxy-based sizing is between 1.3 and 1.5% (wt).
Online since: February 2021
Authors: Alexey Ishkov, Vladimir N. Malikov, Alexandr Shegolev
Based on the obtained data on the microstructures of boride coatings, conclusions were made concerning the most appropriate compositions of boriding mixtures and the mass fraction of fused flux in their composition.
The second thermodynamically resolved reaction can be implemented in addition to the main processes of boron reduction from its carbide with calcium at lower temperatures, and silicon at higher temperatures, also described above.
The increase in the boriding agent particle size up to 150 µm (Fig.1.b) results in a reduction in area occupied by carbide regions and widening of iron-boride eutectic, the transition zone in such a coating is absent.
An increase of the content of P-0.66 fused flux up to 5% by weight due to a reduction of the amount of boriding agent (composition # 6, Table 1.) results in boride coating with a structure represented by a ledeburite-like iron-boride eutectic with closed carbide regions (Fig. 4.b).
Online since: November 2010
Authors: Zhou Yang
Three questionnaires were used for different purposes: (1) the first data set was used to subject degree analysis, any index with low subject degree will be rejected; (2) the second data set was aimed to find indexes with higher value of application.
Valid data is rooted in the third questionnaire.
They provided business data of the first quarter of 2010.
Empirical study was conducted by subject degree analysis, importance analysis and AHP based on large sample data from questionnaires of experts in this industry.
The methodology uses subject degree analysis, the importance analysis and AHP to ensure the scientificity of the data processing
Online since: August 2010
Authors: Zhen Yu Zhao, Bai Liu, Ming Jun Liu
Force data came from a 3D (X, Y, Z) Piezo-electric multicomponent dynamometer type YDM-III99 with control unit for dynamometer with built-in charge amplifier type YE5850.
Data acquisition card is a PC I9118 with maximum acquisition rate of 250,000 samples per second.
The digital data is acquired with 15,000 samples per second, which proved to be high enough to give reliable information during one revolution of the end mill.
The data is processed in Microsoft Excel 2000.
The cutting force data is downloaded from the oscilloscope and information on cutting force signatures are stored onto a floppy disk and post processing of the cutting force data analysis is performed using software.
Online since: September 2013
Authors: Jun Wang, Viboon Saetang
The normalized results for “the-smaller-the-better” characteristics, which are applied to groove width and HAZ width in this study, can be calculated as (1) In the case of groove depth which is ‘the-larger-the-better’ characteristic, the original data can be normalized as (2) where xio(k), xi*(k), i and k are the original data, normalized data, the number of experiments, and the total number of data observations, respectively.
The Grey relational coefficients ranging from 0 to 1 are calculated to provide the relationship between the ideal, which equals 1 for the best value, and the normalized data.
The Grey relational grade indicates the degree of correlation between the reference and comparability, and becomes 1 when the two data are identical.
Experimental and Grey relational analysis data.
Although further reduction of the thermal effect can be reduced, this will be at the cost of the other performance characteristics.
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