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Online since: July 2021
Authors: Mohammed Q. Kareem, Khaled Al-Farhany, Zainab Kareem Ghoben
The results showed that the heat reduction increases by increasing the mould thickness as well as the applied pressure.
An additional case was added to present the effect of the ambient temperature on the heat reduction and solidification processes as in TABLE 2.
These results show that the thickness of the mould has a considerable influence on the temperature reduction were increasing the mould thickness to 15mm increasing the temperature reduction and solidification initiation.
The behavior of the heat reduction (the temperature profile) is the same for the two cases, as well as the solidification profile except the longer time, concluding that controlling the ambient temperature has a great effect on the heat reduction and solidification processes during casting.
Yukinobu Natsume, Jota Ogawa, Munekazu Ohno, Estimation of time-dependent heat transfer coefficient in unidirectional casting using a numerical model coupled with solidification analysis and data assimilation, International Journal of Heat and Mass Transfer, (2019)
An additional case was added to present the effect of the ambient temperature on the heat reduction and solidification processes as in TABLE 2.
These results show that the thickness of the mould has a considerable influence on the temperature reduction were increasing the mould thickness to 15mm increasing the temperature reduction and solidification initiation.
The behavior of the heat reduction (the temperature profile) is the same for the two cases, as well as the solidification profile except the longer time, concluding that controlling the ambient temperature has a great effect on the heat reduction and solidification processes during casting.
Yukinobu Natsume, Jota Ogawa, Munekazu Ohno, Estimation of time-dependent heat transfer coefficient in unidirectional casting using a numerical model coupled with solidification analysis and data assimilation, International Journal of Heat and Mass Transfer, (2019)
Online since: January 2014
Authors: Atria Pradityana, Abdullah Shahab, Sulistijono Sulistijono
Obtained data from weight loss and potentiodynamic polarization methods has shown the value of inhibition efficiency (% IE) is proportional toadded inhibitor concentration.
Tafel constants data indicates that MP extract can act as cathodic and anodic inhibitors (type of mixed inhibitor).
It shows that MP extract works relatively well in the cathodic sides, by reducing the rate of reduction of Na+ion.
From the measured data using weight-loss and potentiodynamic polarization methods indicates that the value of inhibition efficiency increases as increasing MP extract concentrations.
Corrosion parameter data has shown that MP extract is mixed type of inhibitor, working on anodic and cathodic sides.
Tafel constants data indicates that MP extract can act as cathodic and anodic inhibitors (type of mixed inhibitor).
It shows that MP extract works relatively well in the cathodic sides, by reducing the rate of reduction of Na+ion.
From the measured data using weight-loss and potentiodynamic polarization methods indicates that the value of inhibition efficiency increases as increasing MP extract concentrations.
Corrosion parameter data has shown that MP extract is mixed type of inhibitor, working on anodic and cathodic sides.
Online since: May 2014
Authors: Himanshu Panjiar, R.P. Gakkhar, B.S.S. Daniel
Based on observations of graphite particle size under SEM, database built with 223 data points.
Data base spread used for ANN modelling.
In present work data were normalised in the range of ±0.5 based on following equation: pn=2p0-pminpmax-pmin-1 (3) where, p0 is the point observed data, pn is scaled data and pmax, pmin are the maximum and minimum observed data points.
For developing model the available data were separated as 70% for training, 15% for validation and 15% for testing.
The model output for the mentioned input data is shown in Fig. 1d, where dots are representing the mean particle size after milling of specified time intervals.
Data base spread used for ANN modelling.
In present work data were normalised in the range of ±0.5 based on following equation: pn=2p0-pminpmax-pmin-1 (3) where, p0 is the point observed data, pn is scaled data and pmax, pmin are the maximum and minimum observed data points.
For developing model the available data were separated as 70% for training, 15% for validation and 15% for testing.
The model output for the mentioned input data is shown in Fig. 1d, where dots are representing the mean particle size after milling of specified time intervals.
Online since: June 2013
Authors: Li Zhang, Hong Wu
Fig.1 The free suspension way of the machine
The experiment equipments include several ICP type acceleration sensors, one force sensor, one vibration exciter, one power amplifier, LMS modal analysis experiment data acquisition front and the computer data processing software LMS Test.lab Spectral Testing.
Fig.2 The principle of the test system Data analysis and experimental results.
This paper uses the PolyMAX algorithm in the LMS software to analysis the modal data, the first three order natural frequencies and damping ratio of the sewing machine are shown in table 1.
The sewing machine is running from the operating speed of 500r/min to 4000r/min, read the vibration data of the standard point for per additional 100r/min, and 41 accelerating response data is carried out.
Industrial sewing machine vibration and noise reduction technology[D].
Fig.2 The principle of the test system Data analysis and experimental results.
This paper uses the PolyMAX algorithm in the LMS software to analysis the modal data, the first three order natural frequencies and damping ratio of the sewing machine are shown in table 1.
The sewing machine is running from the operating speed of 500r/min to 4000r/min, read the vibration data of the standard point for per additional 100r/min, and 41 accelerating response data is carried out.
Industrial sewing machine vibration and noise reduction technology[D].
Online since: December 2014
Authors: Chao Qin Yang, Ju Pei Xia
At the same time, the phosphogypsum reduction conditions and decomposition rate is controlling factor that potassium sulfate is generated in the system.
Analysis data is provided from Kunming metallurgy research institute.
Reduction breakdown products of CaSO4 have CaO, CaS and SO2 in the phosphogypsum.
CaSO4 reduction decomposition conditions and decomposition rate in the phosphogypsum of in will directly affect K2SO4 generation in the system.
The above study results show that , in the carbon-thermal reaction system of potassium feldspar and phosphogypsum, the products mainly depend on temperature and rate of generated CaO through CaSO4 reduction reaction in the phosphogypsum.
Analysis data is provided from Kunming metallurgy research institute.
Reduction breakdown products of CaSO4 have CaO, CaS and SO2 in the phosphogypsum.
CaSO4 reduction decomposition conditions and decomposition rate in the phosphogypsum of in will directly affect K2SO4 generation in the system.
The above study results show that , in the carbon-thermal reaction system of potassium feldspar and phosphogypsum, the products mainly depend on temperature and rate of generated CaO through CaSO4 reduction reaction in the phosphogypsum.
Online since: January 2014
Authors: Jing Wen Li
Firstly, the image dimensionality reduction by means of the improved PCA algorithm, and then classify the images by using Fisher linear dimensionality reduction method.
The ideas of the combines Fisher linear discriminant and improved PCA is so: Firstly, the image of all training set or palmprint database consisting of data matrix.
The experimental procedures of the method are as follows: (1) Read the palmprint data reduce the dimensions of training samples by the improved PCA algorithm
By the experiment data we can draw a conclusion, when the FLD method and the improved PCA algorithm combined with the use of the palmprint recognition system, the effect is far beyond any single algorithm.
We can see from the data, the recognition rate is greatly improved by use the hybrid algorithm combines the improved PCA algorithm and the Fisher linear discriminant.
The ideas of the combines Fisher linear discriminant and improved PCA is so: Firstly, the image of all training set or palmprint database consisting of data matrix.
The experimental procedures of the method are as follows: (1) Read the palmprint data reduce the dimensions of training samples by the improved PCA algorithm
By the experiment data we can draw a conclusion, when the FLD method and the improved PCA algorithm combined with the use of the palmprint recognition system, the effect is far beyond any single algorithm.
We can see from the data, the recognition rate is greatly improved by use the hybrid algorithm combines the improved PCA algorithm and the Fisher linear discriminant.
Online since: November 2012
Authors: Arnaldo M.G. Pinto, Isabel R. Mendes, A.P.M. Baptista, A.G. Magalhães, Raul D.S.G. Campilho
Furthermore, no data is available about the effects of geometrical and material parameters (e.g. the Young’s modulus of adhesive, E) on the mechanical behaviour optimization of embedded repairs.
Furthermore, no data is available about the effects of geometrical and material parameters (e.g. the value of E of the adhesive) on the mechanical behaviour of embedded repairs.
For the SS repairs, the experimental data showed that for LO=10 mm plastic deformation of adherends or patches did not occur.
The experimental data also showed that increasing LO yields a strength improvement from LO=10 to 20 mm, but above this value of LO a steady-state value of Pm is achieved.
The reported reduction (maximum of 17.7% for LO=30 mm) is related to the reduced adherend thickness at the overlap region (1.6 mm, Fig. 1) because of the thickness reduction at both the adherend faces.
Furthermore, no data is available about the effects of geometrical and material parameters (e.g. the value of E of the adhesive) on the mechanical behaviour of embedded repairs.
For the SS repairs, the experimental data showed that for LO=10 mm plastic deformation of adherends or patches did not occur.
The experimental data also showed that increasing LO yields a strength improvement from LO=10 to 20 mm, but above this value of LO a steady-state value of Pm is achieved.
The reported reduction (maximum of 17.7% for LO=30 mm) is related to the reduced adherend thickness at the overlap region (1.6 mm, Fig. 1) because of the thickness reduction at both the adherend faces.
Online since: June 2010
Authors: Wei Yu Shi, Hua Li, Li Ye Chu, Hong Bo Shao
Results indicated that the co-remediation led to significantly greater (p < 0.01) reduction
in the lead concentration in plants than by singly adding to zeolite.
Results and Discussion The Pb concentration in shoots decreased progressively in all four zeolite doses, irrespective of the data in pot experiment I or pot experiment II.
The difference of data between no humic acid (NHA) and HA was that the lead concentration in grape roots and shoots by HA treatment declined more.
Addition of humic acids resulted in increasing of lead of water-soluble fraction and decreasing of exchangeable fraction, but the major data of content of water-soluble lead was not varying significantly.
Maybe the above could explain why humic acids just caused significant reduction of lead concentration in plants, especially aerial parts at low Pb treatment.
Results and Discussion The Pb concentration in shoots decreased progressively in all four zeolite doses, irrespective of the data in pot experiment I or pot experiment II.
The difference of data between no humic acid (NHA) and HA was that the lead concentration in grape roots and shoots by HA treatment declined more.
Addition of humic acids resulted in increasing of lead of water-soluble fraction and decreasing of exchangeable fraction, but the major data of content of water-soluble lead was not varying significantly.
Maybe the above could explain why humic acids just caused significant reduction of lead concentration in plants, especially aerial parts at low Pb treatment.
Online since: May 2011
Authors: R. Jayaganthan, P. Das, T. Chowdhury, Inderdeep Singh
The cryo-rolled (CR) Al alloy after 70% thickness reduction exhibits ultrafine grain structure as observed from its FESEM micrographs.
The thickness reduction per pass was 5% but many passes were given to achieve the required reduction of the samples.
The load–LLD data for each of the specimen was recorded for subsequent analysis.
(a) 40% reduction and (b) 70% reduction sample.
It has increased from 24 Mpa m1/2 to 28 Mpa m1/2 and 31 Mpa m1/2 to 34 Mpa m1/2 for 40 and70% thickness reductions, respectively.
The thickness reduction per pass was 5% but many passes were given to achieve the required reduction of the samples.
The load–LLD data for each of the specimen was recorded for subsequent analysis.
(a) 40% reduction and (b) 70% reduction sample.
It has increased from 24 Mpa m1/2 to 28 Mpa m1/2 and 31 Mpa m1/2 to 34 Mpa m1/2 for 40 and70% thickness reductions, respectively.
Online since: May 2012
Authors: Takayoshi Shimura, Takuji Hosoi, Takashi Nakamura, Yuki Nakano, Heiji Watanabe, Takashi Kirino, Shuhei Mitani, Atthawut Chanthaphan, Akitaka Yoshigoe, Yuden Teraoka, Yusuke Uenishi, Daisuke Ikeguchi
These results indicate that the hydrogen passivation of negatively charged defects near the thermally grown SiO2/SiC interface causes the reduction in conduction band offset.
Interface state density (Dit) was evaluated by high-low method and DEc of SiC-MOS devices were also electrically estimated from Fowler-Nordheim (FN) plots of the measured I-V data.
This trend agrees well with the SR-PES data.
Thus, we can speculate that passivation of negatively charged defects by FGA caused a reduction in DEc and the extrinsic band structure modulation by the negative fixed charge was again induced by hydrogen desorption after VA, as depicted in Fig. 5.
Arai, Reduction of interface-state density in 4H–SiC n-type metal-oxide-semiconductor structures using high-temperature hydrogen annealing, Appl.
Interface state density (Dit) was evaluated by high-low method and DEc of SiC-MOS devices were also electrically estimated from Fowler-Nordheim (FN) plots of the measured I-V data.
This trend agrees well with the SR-PES data.
Thus, we can speculate that passivation of negatively charged defects by FGA caused a reduction in DEc and the extrinsic band structure modulation by the negative fixed charge was again induced by hydrogen desorption after VA, as depicted in Fig. 5.
Arai, Reduction of interface-state density in 4H–SiC n-type metal-oxide-semiconductor structures using high-temperature hydrogen annealing, Appl.