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Online since: February 2012
Authors: Fabien Poulhaon, Francisco Chinesta, Adrien Leygue
In that sense model reduction based simulation appears to be a very
promising alternative.
Indeed, by no more considering the initial condition of a transient problem as a static input data but as an extra- coordinate similarly to space and time, we demonstrate that it is possible to parallelize efficiently the computation and even reach real-time in some cases.
More details regarding the PGD method and other model reduction methods are given in [1, 2, 5, 7].
Instead of considering it as a static input data, it can be introduced as an extra-coordinate of the model, similarly to space and time.
Boust, Alleviating mesh constraints: model reduction, parallel time integration and high resolution homogenization, Computer Methods in Applied Mechanics and Engineering, 197 (2008) 400-413
Indeed, by no more considering the initial condition of a transient problem as a static input data but as an extra- coordinate similarly to space and time, we demonstrate that it is possible to parallelize efficiently the computation and even reach real-time in some cases.
More details regarding the PGD method and other model reduction methods are given in [1, 2, 5, 7].
Instead of considering it as a static input data, it can be introduced as an extra-coordinate of the model, similarly to space and time.
Boust, Alleviating mesh constraints: model reduction, parallel time integration and high resolution homogenization, Computer Methods in Applied Mechanics and Engineering, 197 (2008) 400-413
Online since: May 2011
Authors: Kasmiran Jumari, Salina Abd. Samad, Ali Abdulgader, Tarik Idbeaa, Nidal Eshah
MPEG-4, Data hiding, BPCS.
Steganography is the idea of embedding a secret data in different media and has become an important regulation of methods of data integration.
This approach invents data hidden in high-security environments.
of course there is limitation of data that could be hide.
It also depending on the amount of data that to be hides in one frame and also to the color information reduction.
Steganography is the idea of embedding a secret data in different media and has become an important regulation of methods of data integration.
This approach invents data hidden in high-security environments.
of course there is limitation of data that could be hide.
It also depending on the amount of data that to be hides in one frame and also to the color information reduction.
Online since: December 2013
Authors: Jing Ren, Dong Dong Xu, Yi Ping Zhang
At present, resources and environment situation is not optimistic in our country, therefore, the “11th five-year plan” outline points out "energy conservation and emissions reduction”.
When the car passes through the deceleration strip, it can make the idle energy into power, which is very much in line with the concept of energy saving and emission reduction.
So our country put forward “the eleventh five-year plan” for energy conservation and emissions reduction, and has obtained remarkable achievement.
It has theoretical and practical feasibility and implements energy conservation and emissions reduction, reduces the cost of entrance guard system.
Relevant data show that in one highway toll of Beijing, for example, there are 50000 vehicles through it daily, whose average weight is 8000 Kg.
When the car passes through the deceleration strip, it can make the idle energy into power, which is very much in line with the concept of energy saving and emission reduction.
So our country put forward “the eleventh five-year plan” for energy conservation and emissions reduction, and has obtained remarkable achievement.
It has theoretical and practical feasibility and implements energy conservation and emissions reduction, reduces the cost of entrance guard system.
Relevant data show that in one highway toll of Beijing, for example, there are 50000 vehicles through it daily, whose average weight is 8000 Kg.
Online since: October 2012
Authors: Xue Yi Guo, Bao Zhang, Jia Feng Zhang, He Zhang Chen, Chao Shen, Jun Chao Zheng, Jian Long Wang
The Preparation and Characterization of LiFe0.98Ni0.01Nb0.01PO4/C by Carbon Reduction Route
Jia-feng, ZHANG1, a, Bao ZHANG1,b , Xue-yi GUO1,c, Jian-long WANG1,d,
He-zhang CHEN1, Chao SHEN1 and Jun-chao ZHENG1
1School of Metallurgical Science and Engineering, Central South University, Changsha 410083,
Hunan, China
acsuzjf@163.com,bcsuzb@vip.163.com,cxyguo@mail.csu.edu.cn,dcsuwjl@163.com
Keywords: LiFePO4/C, Ni and Nb co-doping, Carbon reduction
Abstract: The LiFe0.98Ni0.01Nb0.01PO4/C was synthesized by carbon reduction route using FePO4·2H2O as precursor.
Except to enhance the conductivity and the mean operation voltage, a high capacity was also expected for the LiFePO4-based Li ion batteries. 2 Experimental The LiFe0.98Ni0.01Nb0.01PO4/C was synthesized by means of carbon reduction route using FePO4·2H2O as precursor.
The data were collected in the range between 10 and 90° in steps of 10°/min.
Conclusions The LiFe0.98Ni0.01Nb0.01PO4/C composite was synthesized carbon reduction route using FePO4·2H2O as precursor.
Except to enhance the conductivity and the mean operation voltage, a high capacity was also expected for the LiFePO4-based Li ion batteries. 2 Experimental The LiFe0.98Ni0.01Nb0.01PO4/C was synthesized by means of carbon reduction route using FePO4·2H2O as precursor.
The data were collected in the range between 10 and 90° in steps of 10°/min.
Conclusions The LiFe0.98Ni0.01Nb0.01PO4/C composite was synthesized carbon reduction route using FePO4·2H2O as precursor.
Online since: November 2014
Authors: Yi Chen, Si Cheng Deng
Age estimation is an important method to solve the face recognition with age change, due to the feature extraction,in the process of age estimation study, PCA dimensional reduction method is usually used to reduce dimension with excessive dimension.PCA refers that transform the sample matrix into one-dimensional vector first, then the one-dimensional vectors form a matrix, solve the eigenvector. 2D-PCA applied in this paper is not required to transform the sample matrix into one-dimensional vector, but construct scatter matrix with data matrix directly, accordingly, the computing time is reduced and a good performance evaluation is achieved in the test.
PCA generally refers that transform the sample matrix into a one-dimensional vector first, then a number of the sample vectors form a matrix[4], finally solve the eigenvectors of the covariance matrix; 2D-PCA is not required to transform the sample matrix into a one-dimensional vector, but construct scatter matrix with data matrix directly,therefore, characteristics extracted by 2D-PCA are better and faster than PCA and the calculation time is reduced.
Compare with PCA and 2D-PCA dimension reduction method of the face image identification and the calibration point method, the time spent and the recognition rate were as shown in Figure 1.
Randomly select the training sample, the rest are as test sample, treat with PCA and 2DPCA dimension reduction. 3.
Table1 Experimental results Test methods Group 1 Accuracy rate Group 2 Accuracy rate Group 3 Accuracy rate Running time Calibration points 70.0% 71.2% 71.1% 22.62s PCA 69.4% 69.1% 70.4% 91.65s 2DPCA 71.1% 72.4% 70.6% 35.94s The test results showed that the original image information was not required to read due to the use of calibration point method, thus dimension reduction was not needed, therefore the running time was the shortest; while the running time of using traditional PCA dimension reduction method was the longest, the 2D -PCA method used in this paper was considerably less than the traditional PCA method.
PCA generally refers that transform the sample matrix into a one-dimensional vector first, then a number of the sample vectors form a matrix[4], finally solve the eigenvectors of the covariance matrix; 2D-PCA is not required to transform the sample matrix into a one-dimensional vector, but construct scatter matrix with data matrix directly,therefore, characteristics extracted by 2D-PCA are better and faster than PCA and the calculation time is reduced.
Compare with PCA and 2D-PCA dimension reduction method of the face image identification and the calibration point method, the time spent and the recognition rate were as shown in Figure 1.
Randomly select the training sample, the rest are as test sample, treat with PCA and 2DPCA dimension reduction. 3.
Table1 Experimental results Test methods Group 1 Accuracy rate Group 2 Accuracy rate Group 3 Accuracy rate Running time Calibration points 70.0% 71.2% 71.1% 22.62s PCA 69.4% 69.1% 70.4% 91.65s 2DPCA 71.1% 72.4% 70.6% 35.94s The test results showed that the original image information was not required to read due to the use of calibration point method, thus dimension reduction was not needed, therefore the running time was the shortest; while the running time of using traditional PCA dimension reduction method was the longest, the 2D -PCA method used in this paper was considerably less than the traditional PCA method.
Online since: September 2013
Authors: Chong Jiang Cao, Xiao Geng Liu, Qin Liu
Oxygen reduction measurements performed by linear sweep voltammetry indicat the good catalytic activity of Pd-Mo by SEA compared to dry impregnation (DI) bimetallic catalysts since the SEA technique produced more well dispersed and intimately designed bimetallic particles after reduction.
The slurries were dried at room temperature for a couple of days, followed by reduction in H2.
The data was analyzed with the BET equation to calculate the surface area. 2.3 Electrochemical characterization Electrochemical measurements were performed using a CHI660A Potentiostat and a conventional three-compartment electrochemical glass cell.
It is predicted that the particles of Pd formed because the PdMo alloy can not be formed at low temperature reduction.
It is found that the ORR mass activity increase first and then decrease with the increase of reduction temperature.
The slurries were dried at room temperature for a couple of days, followed by reduction in H2.
The data was analyzed with the BET equation to calculate the surface area. 2.3 Electrochemical characterization Electrochemical measurements were performed using a CHI660A Potentiostat and a conventional three-compartment electrochemical glass cell.
It is predicted that the particles of Pd formed because the PdMo alloy can not be formed at low temperature reduction.
It is found that the ORR mass activity increase first and then decrease with the increase of reduction temperature.
Online since: August 2004
Authors: Kyu In Shin, Jai Hak Park
The analysis results are also compared with the
experiment data from published references and they show a good agreement with the experiment data.
As shown in Fig. 6 the calculated values from material Model 1 agree well with the experiment data.
The results from the Model 2 are lower than the experiment data until the wear depth ratio becomes 0.8.
And the Model 2 gives conservative pressure values comparing with the Model 1 and the experiment data.
The calculated results are also compared with the experiment data in the Alzheimer et al. [3].
As shown in Fig. 6 the calculated values from material Model 1 agree well with the experiment data.
The results from the Model 2 are lower than the experiment data until the wear depth ratio becomes 0.8.
And the Model 2 gives conservative pressure values comparing with the Model 1 and the experiment data.
The calculated results are also compared with the experiment data in the Alzheimer et al. [3].
Online since: July 2013
Authors: Shou Hai Li, Kun Huang, Jian Ling Xia, Mei Li, Zhi Qu Lu, Xiao Dong Tang
The data reveal that LAH could effectively reduce terpene maleic anhydride to corresponding alcohol, and the conversion rate of raw material could reach 84%.
To date, few studies have been reported on the reduction of dicarboxylic acid anhydrides using lithium aluminium hydride as reductant for the production of diols2-3.
Results and discussion The influence factors of reduction reaction As shown in Figure 1, the synthesis started with a highly efficient Diels–Alder reaction between dipentene and maleic anhydride to produce TMA, followed by a reduction reaction using the aid of lithium aluminium hydride as reductant.
Control of lithium aluminium hydride reduction of Cyclic Dicarboxylic Acid anhydrides to produce γ-Lactones or Diols.
Efficient one-pot selective reduction of esters in β-ketoesters using LiHMDS and lithium aluminium hydride.
To date, few studies have been reported on the reduction of dicarboxylic acid anhydrides using lithium aluminium hydride as reductant for the production of diols2-3.
Results and discussion The influence factors of reduction reaction As shown in Figure 1, the synthesis started with a highly efficient Diels–Alder reaction between dipentene and maleic anhydride to produce TMA, followed by a reduction reaction using the aid of lithium aluminium hydride as reductant.
Control of lithium aluminium hydride reduction of Cyclic Dicarboxylic Acid anhydrides to produce γ-Lactones or Diols.
Efficient one-pot selective reduction of esters in β-ketoesters using LiHMDS and lithium aluminium hydride.
Online since: August 2004
Authors: Tae Won Park, Hyung Suk Han, Il Ho Jung, Joo Yong Kim, Jong Hwi Seo
Other than this,
noise/vibration can also be caused by nonparallel armature and the interaction between the armature
shaft and bearing.[1,2] Title of Publication (to be inserted by the publisher)
After analyzing the data of a durability test relating to brush noise in DC motors (Table 1), it can be
seen that the element that has the biggest influence is the roundness of the commutator (Fig. 1).
According to the test data, the roundness deteriorated as the DC motor ran and this increased the brush noise.
There was a noise reduction of 1.3 dB(A) for the 3 inner points Title of Publication (to be inserted by the publisher) and a noise reduction of 3.5 dB(A) for the 4 outer points.
(1) After the durability test, it can be concluded that the interaction between the brush and the commutator has the biggest influence on the brush noise of a DC motor through a noise test data.
(3) Vibration also had a reduction effect.
According to the test data, the roundness deteriorated as the DC motor ran and this increased the brush noise.
There was a noise reduction of 1.3 dB(A) for the 3 inner points Title of Publication (to be inserted by the publisher) and a noise reduction of 3.5 dB(A) for the 4 outer points.
(1) After the durability test, it can be concluded that the interaction between the brush and the commutator has the biggest influence on the brush noise of a DC motor through a noise test data.
(3) Vibration also had a reduction effect.
Online since: December 2012
Authors: Chuan Min Chen, Li Xing Jiang, Song Tao Liu, Yu Ze Jiang
The established data reflected an outstanding performance on the Hg0 re-emission inhibition from the simulated WFGD liquors by adding DTCR.
Our data suggested that a concentration of 0.0005% (v/v) was enough for Hg0 re-emission inhibition in the simulated WFGD liquors.
The elemental mercury (Hg0) re-emission and the factors that impact DTCR Hg2+ precipitation efficiency and Hg2+ reduction inhibition were investigated by using the simulated scrubber.
The established data reflected an outstanding performance on the Hg0 re-emission inhibition from the simulated WFGD liquors by adding DTCR.
Our data suggested that a concentration of 0.0005% (v/v) was enough for Hg0 re-emission inhibition in the simulated WFGD liquors.
Our data suggested that a concentration of 0.0005% (v/v) was enough for Hg0 re-emission inhibition in the simulated WFGD liquors.
The elemental mercury (Hg0) re-emission and the factors that impact DTCR Hg2+ precipitation efficiency and Hg2+ reduction inhibition were investigated by using the simulated scrubber.
The established data reflected an outstanding performance on the Hg0 re-emission inhibition from the simulated WFGD liquors by adding DTCR.
Our data suggested that a concentration of 0.0005% (v/v) was enough for Hg0 re-emission inhibition in the simulated WFGD liquors.