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Online since: September 2007
Authors: Andrew Godfrey, Qing Liu, Feng Xiang Lin
One complication with the data analysis in that study
however is that data for all sample symmetry variants of each orientation are grouped together.
The material was cold rolled to a reduction of 20% (true strain 0.22).
The same microscope was used to obtain the EBSD data (HKL Technology, Channel 5).
Results and discussion After rolling to a reduction of 20%, the fraction of rolling texture orientations increased slightly to 75%.
The boundary map is obtained from the EBSD data and shows misorientations of greater than 10°.
The material was cold rolled to a reduction of 20% (true strain 0.22).
The same microscope was used to obtain the EBSD data (HKL Technology, Channel 5).
Results and discussion After rolling to a reduction of 20%, the fraction of rolling texture orientations increased slightly to 75%.
The boundary map is obtained from the EBSD data and shows misorientations of greater than 10°.
Online since: January 2016
Authors: Adrian Cernaianu, Dragoș Tutunea, George Gherghina
The sensor detect only conductive materials, so a reduction coefficient must be defined when are used different metals (Table 3).
Also usually the reduction coefficient varies function of the size of the measured object.
In our case: Standard sensing distance (Sn) x 0.3; Reduction coefficient aluminum = 10 x 0.3= 3 mm; Fig. 3 Establishing the optimal distance between sensor and gear Table 3 Reduction coefficients Material Coefficient Mild steel 1 Aluminum foil 0.95 Stainless steel 0.7 Brass 0.4 Aluminum 0.3 Copper 0.28 The distance from sensor to the gear tooth was established at 3 mm.
The data collected are compared with the data obtained from the measurements with the optical tachometer.
The students of Road Vehicles recorded these experimental data in the laboratory of Mechatronics.
Also usually the reduction coefficient varies function of the size of the measured object.
In our case: Standard sensing distance (Sn) x 0.3; Reduction coefficient aluminum = 10 x 0.3= 3 mm; Fig. 3 Establishing the optimal distance between sensor and gear Table 3 Reduction coefficients Material Coefficient Mild steel 1 Aluminum foil 0.95 Stainless steel 0.7 Brass 0.4 Aluminum 0.3 Copper 0.28 The distance from sensor to the gear tooth was established at 3 mm.
The data collected are compared with the data obtained from the measurements with the optical tachometer.
The students of Road Vehicles recorded these experimental data in the laboratory of Mechatronics.
Online since: May 2016
Authors: Anatoly S. Vereshchaka, Alexey Anatolevich Vereschaka, Julia Prilukova, Jury Bublikov, Anatoly Aksenenko
The study has revealed the reduction in thickness of "white layer" of surfaces of machined workpieces of hardened high-alloyed steels in use of coated ceramic tools and the increase of cutting properties of coated ceramic tools.
The analysis of the data of the experimental studies suggests the following.
The above allows predicting the increase in quality of machined surfaces and the reduction of wear rate when using the coated tools.
In particular, the study has revealed the reduction in thickness of "white layer" of surface layers of workpiece in machining with coated ceramic inserts and the increase of cutting properties of coated ceramic inserts.
The study has revealed the reduction in thickness of "white layer" of surfaces of machined workpieces of hardened high-alloyed steels in use of coated ceramic tools and the increase of cutting properties of coated ceramic tools.
The analysis of the data of the experimental studies suggests the following.
The above allows predicting the increase in quality of machined surfaces and the reduction of wear rate when using the coated tools.
In particular, the study has revealed the reduction in thickness of "white layer" of surface layers of workpiece in machining with coated ceramic inserts and the increase of cutting properties of coated ceramic inserts.
The study has revealed the reduction in thickness of "white layer" of surfaces of machined workpieces of hardened high-alloyed steels in use of coated ceramic tools and the increase of cutting properties of coated ceramic tools.
Online since: October 2025
Authors: Bambang Widyanto, Vera Novi Anggraini, Soleh Wahyudi, Sri Mulyati Latifah
Fig. 2 Schematics of electropolishing process
Data and Discussion
Determination of Current Density and Voltage
Fig. 3 Current Density – Voltage Curve
Based on the Figure 3, it can be observed that at a voltage of 6.1 Volts, there is an electropolishing region with a constant current of 45.3 Amperes and a current density of 156.15 A/dm².
Fig. 6 Relation time on surface roughness In the case of time variation from the obtained data, it is evident that the longer the polishing time, the higher the reduction in surface roughness.
This is supported by the findings from my own research, where the average reduction value was obtained as 57.246%.
Once the curve is formed, a data fitting process is performed to determine icorr and Ecorr by drawing straight lines on the anodic and cathodic parts of the curve until they intersect.
The data fitting results for the specimen can be seen in Table 3.
Fig. 6 Relation time on surface roughness In the case of time variation from the obtained data, it is evident that the longer the polishing time, the higher the reduction in surface roughness.
This is supported by the findings from my own research, where the average reduction value was obtained as 57.246%.
Once the curve is formed, a data fitting process is performed to determine icorr and Ecorr by drawing straight lines on the anodic and cathodic parts of the curve until they intersect.
The data fitting results for the specimen can be seen in Table 3.
Online since: April 2011
Authors: Pan Daru, Zhang Han
Introduction
Network coding is a technique that successfully increases throughput and reliability by mixing together data from different sources and broadcasting the coded data.
We modify the DATA headers of the existing 802.11 MAC Specifications.
Total number of data packet transmissions Fig 4 compares the “Total number of data packet transmissions” of the proposed algorithm with simulated MORE-M and traditional multicast tree algorithm in 10 different scenarios.
The “Total number of data packet transmissions” refers to the total number of data packets broadcasted by the source and the forwarding nodes.
Fig.4 shows that the proposed algorithm needs fewer data packet transmissions than MORE-M and the traditional multicast tree.
We modify the DATA headers of the existing 802.11 MAC Specifications.
Total number of data packet transmissions Fig 4 compares the “Total number of data packet transmissions” of the proposed algorithm with simulated MORE-M and traditional multicast tree algorithm in 10 different scenarios.
The “Total number of data packet transmissions” refers to the total number of data packets broadcasted by the source and the forwarding nodes.
Fig.4 shows that the proposed algorithm needs fewer data packet transmissions than MORE-M and the traditional multicast tree.
Online since: December 2009
Authors: J. Taheri Kahnamouei, Mohammad Sedighi
For a certain bending angle and radius,
it have been observed that the depth of wrinkling, change in wall thickness, and cross section
distortion increase with reduction in wall thickness and outer diameter-to-wall thickness ratio
Introduction
Recently, curved tubular parts have attracted more applications in automobile, aerospace, oil
industries and anywhere high strength/weight ratio products are needed.
In the present work, wrinkle phenomenon, changes in wall thickness are studied in thin wall tube using analytical, experimental and FEM data.
It is also found that the maximum thinning reduction which happens in tube with 1.5mm thickness is equal to 6.5% and minimum thinning reduction which happens in tube with 0.9mm is equal to3%.
It can be seen that the thickness of the inside of the bend is increased, and the maximum thickness thickening reduction is 10 %. 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 33 40 56 d/t wall thickness of intrados experimental FE theory Fig. 7: Comparison of results obtained from FEM, experiments and theory for thickness distribution for intrados wall thickness Summary This study deals with the defects in thin-walled tube bending process such as wrinkling, wall thinning and thickening.
Guarracino: On the analysis of cylindrical tubes under flexure: theoretical formulations, experimental data and finite element analyses, Thin-Walled Structures, 41, 127, 147(2003) [5] H.
In the present work, wrinkle phenomenon, changes in wall thickness are studied in thin wall tube using analytical, experimental and FEM data.
It is also found that the maximum thinning reduction which happens in tube with 1.5mm thickness is equal to 6.5% and minimum thinning reduction which happens in tube with 0.9mm is equal to3%.
It can be seen that the thickness of the inside of the bend is increased, and the maximum thickness thickening reduction is 10 %. 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 33 40 56 d/t wall thickness of intrados experimental FE theory Fig. 7: Comparison of results obtained from FEM, experiments and theory for thickness distribution for intrados wall thickness Summary This study deals with the defects in thin-walled tube bending process such as wrinkling, wall thinning and thickening.
Guarracino: On the analysis of cylindrical tubes under flexure: theoretical formulations, experimental data and finite element analyses, Thin-Walled Structures, 41, 127, 147(2003) [5] H.
Online since: December 2013
Authors: Nabilla Sofia Mohd Kamil, Siti Zawiah Md Dawal
National Health Interview Survey [5]and National Health and Nutrition Examination Survey Data (1999-2004) reported that back represent the greater rate of pain compared to hips, knee, legs, shoulder, and the upper limb.
Data collection Postural angle of the upper trunk and pelvis were recorded by Inline 2D inclinometer (NORAXON EMG & Sensor System) .The size of the inclinometer were 3.05 (width) x 3.05 (height) x 3.05 cm (depth) and the weight was 45.5g.
Subject performed 20 minutes computer work Data analysis The raw data of EMG were normalized to the maximum voluntary contraction (MVC) to calibrate the microvolt value of the RMS to the percentage of maximum interventions capacity (%MVC).
For the ease of comparison, the data of postural angle was grouping into interval of 5.The result obtained are not much different from the study done by Dumas, Upjohn [1]that identified the deviation of trunk posture of women during computer work was approximately -2 to 10 degree .
The postural data collected during 20 minutes task cannot explained this result, which may be related to long period of work in a sitting posture.
Data collection Postural angle of the upper trunk and pelvis were recorded by Inline 2D inclinometer (NORAXON EMG & Sensor System) .The size of the inclinometer were 3.05 (width) x 3.05 (height) x 3.05 cm (depth) and the weight was 45.5g.
Subject performed 20 minutes computer work Data analysis The raw data of EMG were normalized to the maximum voluntary contraction (MVC) to calibrate the microvolt value of the RMS to the percentage of maximum interventions capacity (%MVC).
For the ease of comparison, the data of postural angle was grouping into interval of 5.The result obtained are not much different from the study done by Dumas, Upjohn [1]that identified the deviation of trunk posture of women during computer work was approximately -2 to 10 degree .
The postural data collected during 20 minutes task cannot explained this result, which may be related to long period of work in a sitting posture.
Online since: February 2011
Authors: A. Freeda Amir, A.R. Othman
The set-up was equipped with data acquisition software of DEWESoft v6.0 in order to simultaneously record the impact force and penetration time.
Test data of the compressive load and the displacement of compressive surface of the specimens were measured using a 30kN Instron universal testing machine.
The compressive strength and modulus of the impact sandwich were determined to evaluate the reduction percentage of the properties.
From DEWEsof transient data, load and energy versus time were plotted using the parameters for different energy level and compared as shown in Fig. 1.
On the other hand, the reduction in crush strength of the sandwich was observed up to 29.27% in comparison to the value quoted by manufacturer.
Test data of the compressive load and the displacement of compressive surface of the specimens were measured using a 30kN Instron universal testing machine.
The compressive strength and modulus of the impact sandwich were determined to evaluate the reduction percentage of the properties.
From DEWEsof transient data, load and energy versus time were plotted using the parameters for different energy level and compared as shown in Fig. 1.
On the other hand, the reduction in crush strength of the sandwich was observed up to 29.27% in comparison to the value quoted by manufacturer.
Online since: April 2014
Authors: Shahrom Mahmud, Amna Sirelkhatim, Rabab Khalid Sendi
The annealing process also improves grain crystallinity, as shown in the decrease in intrinsic compressive stress based on the X-ray diffraction lattice constant and full-width at half-maximum (FWHM) data.
The reduction in breakdown voltage can be clarified by the increment in the average grain size after the sintering process, thus reducing the numbers of grain boundaries between the electrodes and causing the reduction ‘p-n junctions’.
The big drop in ρ can be attributed to the reduction in the potential barrier between the ZnO grains.
This reduction results from a very high growth of grains in the ZnO nanoparticles after sintering, which decreases the number of grain boundaries between the ZnO grains, thus reducing the potential barrier.
Summarized data from SEM images, XRD patterns, and electrical test Sample Annealing ambient SEM XRD Electrical parameters Grain size (μm) intensity (a.u.) 2θ (deg.)
The reduction in breakdown voltage can be clarified by the increment in the average grain size after the sintering process, thus reducing the numbers of grain boundaries between the electrodes and causing the reduction ‘p-n junctions’.
The big drop in ρ can be attributed to the reduction in the potential barrier between the ZnO grains.
This reduction results from a very high growth of grains in the ZnO nanoparticles after sintering, which decreases the number of grain boundaries between the ZnO grains, thus reducing the potential barrier.
Summarized data from SEM images, XRD patterns, and electrical test Sample Annealing ambient SEM XRD Electrical parameters Grain size (μm) intensity (a.u.) 2θ (deg.)
Online since: December 2012
Authors: Chang Jiang Long, Xuan Li, Peng Wan
We firstly get the NIR spectrum of some Chinese medicine, and then use LSA technology to process the data and cluster them.
We use Hierarchical clustering method (the shortest distance method) to cluster the original data.
And data are arranged in an unexpected order; even the medicines for benefiting qi can not be clustered together.
Fig.3 The cluster result of the data after SVD reduction It can be seen that all the same medicines are arranged together and the medicines from 1 to 20 are clustered to the same group.
Computational Statistics & Data Analysis. 11 (1990) 873-912.
We use Hierarchical clustering method (the shortest distance method) to cluster the original data.
And data are arranged in an unexpected order; even the medicines for benefiting qi can not be clustered together.
Fig.3 The cluster result of the data after SVD reduction It can be seen that all the same medicines are arranged together and the medicines from 1 to 20 are clustered to the same group.
Computational Statistics & Data Analysis. 11 (1990) 873-912.