Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: May 2014
Authors: Hong Bing Huang
They can not yield a simple yet effective mapping function for the new coming test data sets.
Classification performance on Iris data set.
The following two real-world data sets are all from the UCI machine learning repository [11].
Influence of data normalization mode.
The proposed MML has nothing to do with specific data.
Classification performance on Iris data set.
The following two real-world data sets are all from the UCI machine learning repository [11].
Influence of data normalization mode.
The proposed MML has nothing to do with specific data.
Online since: July 2015
Authors: Jei Pil Wang, Shun Myung Shin, Dong Ju Shin, Sung Ho Joo
Therefore, Py is one of the most common materials for the magnetic data storage and can be found in a variety of magnetic micro and nanostructures [6,7].
Multiple step reactions for the reduction of iron and nickel oxides by hydrogen were proposed by thermodynamic program using HSC Chemistry5.1.
Experimental The reduction of iron-nickel oxide using hydrogen gas was conducted at the range of temperature from 800°C and 1000°C.
Multiple step reactions for the reduction of iron and nickel oxides by hydrogen were proposed and their data of gibbs free energy change (ΔG) were calculated by thermodynamic program given by HSC Chemistry5.1.
XRD pattern and shape of metallic powder obtained after hydrogen reduction.
Multiple step reactions for the reduction of iron and nickel oxides by hydrogen were proposed by thermodynamic program using HSC Chemistry5.1.
Experimental The reduction of iron-nickel oxide using hydrogen gas was conducted at the range of temperature from 800°C and 1000°C.
Multiple step reactions for the reduction of iron and nickel oxides by hydrogen were proposed and their data of gibbs free energy change (ΔG) were calculated by thermodynamic program given by HSC Chemistry5.1.
XRD pattern and shape of metallic powder obtained after hydrogen reduction.
Online since: January 2014
Authors: Hui Fen Yang, Bei Ping Jiang, Jin Long Zhang, Lin Fei Lu, Chuan Long Wang, Qiong Yao Tang
J.W.Park et al [16] who used coal-based direct reduction process to research the direct reduction of iron in the hot mill sludge.
The carbon (50.47%) was the main active reagent in the direct reduction process.
Effect of reduction time on the iron recovery of lead slag was shown in Fig. 5.
Fig. 6 Effect of reducing agent ratio on iron recovery The recovery of iron in lead slag is mainly achieved by reduction reaction, which includes direct reduction and indirect reduction with coal as reductant.
Fig. 7 Effect of CaO ratio on iron recovery From data shown in Fig. 3, the values of Eq. (4) and Eq. (5) are always less than that of Eq. (1)and Eq. (2), indicating the increasing possibility of reduction Fe2SiO4 and Fe2AlO4 to metallic iron after adding CaO into the mixture.
The carbon (50.47%) was the main active reagent in the direct reduction process.
Effect of reduction time on the iron recovery of lead slag was shown in Fig. 5.
Fig. 6 Effect of reducing agent ratio on iron recovery The recovery of iron in lead slag is mainly achieved by reduction reaction, which includes direct reduction and indirect reduction with coal as reductant.
Fig. 7 Effect of CaO ratio on iron recovery From data shown in Fig. 3, the values of Eq. (4) and Eq. (5) are always less than that of Eq. (1)and Eq. (2), indicating the increasing possibility of reduction Fe2SiO4 and Fe2AlO4 to metallic iron after adding CaO into the mixture.
Online since: June 2014
Authors: Ya Xin Su, Yue Zhou Qi, Wen Yi Deng
The results showed that SO2 did not place negative effect on NO reduction by iron.
Su et al [12] proposed the NO reduction by metallic iron mesh rolls and experimentally studied the NO reduction by methane over iron mesh roll [13].
The results showed that SO2 did not place negative effect on NO reduction by iron.
(a) SEM image and the site to conduct the EDS (b) EDS result Element apparent concentration wt% Atom ratio,% C 0.10 2.10 6.28 O 5.92 17.96 40.37 S 0.61 3.95 4.42 Fe 9.69 75.99 48.92 total: 100.00 100.00 (c) quantitative elements data Fig 7 Local EDS analysis of the iron sample after reaction (Flow rate 1.5L/min, NO=0.05%, SO2=0.01%, CH4= 0.4%, N2 balance, 1050°C) (a) SEM image and the site to conduct the EDS (b) EDS result Element apparent concentration wt% Atom ratio, % C 0.19 3.83 9.65 O 8.23 28.30 53.55 Fe 7.10 67.87 36.80 total: 100.00 100.00 (c) quantitative elements data Fig 8 Local EDS analysis of the iron sample after reaction (Flow rate 1.5L/min, NO=0.05%, SO2=0.01%, CH4= 0.4%, N2 balance, 1050°C) Sulfur was detected at the iron surface where white attachment was produced, as showed in Fig 7.
The results showed that SO2 did not place negative effect on NO reduction by iron.
Su et al [12] proposed the NO reduction by metallic iron mesh rolls and experimentally studied the NO reduction by methane over iron mesh roll [13].
The results showed that SO2 did not place negative effect on NO reduction by iron.
(a) SEM image and the site to conduct the EDS (b) EDS result Element apparent concentration wt% Atom ratio,% C 0.10 2.10 6.28 O 5.92 17.96 40.37 S 0.61 3.95 4.42 Fe 9.69 75.99 48.92 total: 100.00 100.00 (c) quantitative elements data Fig 7 Local EDS analysis of the iron sample after reaction (Flow rate 1.5L/min, NO=0.05%, SO2=0.01%, CH4= 0.4%, N2 balance, 1050°C) (a) SEM image and the site to conduct the EDS (b) EDS result Element apparent concentration wt% Atom ratio, % C 0.19 3.83 9.65 O 8.23 28.30 53.55 Fe 7.10 67.87 36.80 total: 100.00 100.00 (c) quantitative elements data Fig 8 Local EDS analysis of the iron sample after reaction (Flow rate 1.5L/min, NO=0.05%, SO2=0.01%, CH4= 0.4%, N2 balance, 1050°C) Sulfur was detected at the iron surface where white attachment was produced, as showed in Fig 7.
The results showed that SO2 did not place negative effect on NO reduction by iron.
Online since: September 2007
Authors: B. Matović, A. Devečerski, A. Radosavljević-Mihajlović, A. Egelja, M. Pošarac
Fabrication of SiC by Carbothermal-Reduction Reactions of Sepiolite
A.
Abstract The objective of this manuscript was to investigate the synthesis of SiC by carbothermal- reduction reactions of sepiolite.
The most promising candidate for obtaining a large variety of non-oxide products for important technical uses is carbothermal-reduction reaction (CRR) [4].
Due to its composition and high surface area, it can be used as an Si precursor for the synthesis of SiC powder by carbothermal-reduction reaction (CRR) by mixing it with one of reducing agents.
Only when phenol-formaldehyde resin (as a precursor of carbon) was used, good quality SiC was obtained in rather mild conditions (1673 K, 1h) when compared with the literature data (T=1773-2273K) [8].
Abstract The objective of this manuscript was to investigate the synthesis of SiC by carbothermal- reduction reactions of sepiolite.
The most promising candidate for obtaining a large variety of non-oxide products for important technical uses is carbothermal-reduction reaction (CRR) [4].
Due to its composition and high surface area, it can be used as an Si precursor for the synthesis of SiC powder by carbothermal-reduction reaction (CRR) by mixing it with one of reducing agents.
Only when phenol-formaldehyde resin (as a precursor of carbon) was used, good quality SiC was obtained in rather mild conditions (1673 K, 1h) when compared with the literature data (T=1773-2273K) [8].
Online since: November 2011
Authors: Lian Ping Chen, Yuan Hong Gao, Jian Gao Yang, Bai Tao Su
This hints that the reduction mechanism might be different.
During the reduction of WO3 or Na2WO4 through the ball milling, the incomplete reduction should be considered.
Fig. 2 gives the calculation results of the incomplete reduction of Na2WO4.
Though the reduction of many reagents can be explained by the multi-step reduction mechanism, the reduction of Na2WO4 or WO3 by ball milling seems an exception.
Hu, Handbook on the thermodynamic data of inorganic materials (2nd edition); Metallurgy Industrial Publishing House, Beijing, China, 2002.
During the reduction of WO3 or Na2WO4 through the ball milling, the incomplete reduction should be considered.
Fig. 2 gives the calculation results of the incomplete reduction of Na2WO4.
Though the reduction of many reagents can be explained by the multi-step reduction mechanism, the reduction of Na2WO4 or WO3 by ball milling seems an exception.
Hu, Handbook on the thermodynamic data of inorganic materials (2nd edition); Metallurgy Industrial Publishing House, Beijing, China, 2002.
Online since: October 2010
Authors: Yang Liu, Zhi Sheng Zhang, Jin Fei Shi
The last step provides the sources of the variation of the measurement data.
One is a Fourier basis for periodic data while the other is a B-spline basis for non-periodic data.
Fig.2 HFE Standardized Test Data Scatter Diagram .
Silverman: Functional Data Analysis (Springer , New York, U.S.A 2006), pp.84-85
Vieu: Computational Statistics & Data Analysis, Vol. 51 (2007) No.10, pp. 4788-4792
One is a Fourier basis for periodic data while the other is a B-spline basis for non-periodic data.
Fig.2 HFE Standardized Test Data Scatter Diagram .
Silverman: Functional Data Analysis (Springer , New York, U.S.A 2006), pp.84-85
Vieu: Computational Statistics & Data Analysis, Vol. 51 (2007) No.10, pp. 4788-4792
Online since: June 2013
Authors: Zheng Zhong Duan
Therefore, the loss of contacting transformer reduction is the scope of technical loss reduction, and main control one is to contact the transformer's active power and reactive power with loss [6].
The simulation data is the actual operation data of the Northeast Power Grid.
It controlled and simulated the two methods, the active and reactive power and data simulation, and this two control strategies loss Reduction simple analysis confirmed its feasibility.
It also will contact the transformer active and reactive power control effectiveness and voltage regulator effect again contrast by the actual data simulation.
Power plant transformer loss reduction control strategy [J].
The simulation data is the actual operation data of the Northeast Power Grid.
It controlled and simulated the two methods, the active and reactive power and data simulation, and this two control strategies loss Reduction simple analysis confirmed its feasibility.
It also will contact the transformer active and reactive power control effectiveness and voltage regulator effect again contrast by the actual data simulation.
Power plant transformer loss reduction control strategy [J].
Online since: March 2012
Authors: Dong Sun, Xu Dong Yang
Weight-reduction Optimization Design For Milling Planer Bed
Based on Finite Element Analysis
Dong Sun1, a, Xudong Yang1, b
1 School of Mechanical Engineering, Guizhou University, Guiyang, Guizhou, China
apilliar3660@163.com, byxd_gzu@163.com
Keywords: Milling planer bed, Weight-reduction, FEA, Static stiffness, Dynamic characteristics
Abstract.
Three-dimensional modeling method is used to calculate the exact weight of the bed and then finite element analysis is used to research the static and dynamic characteristics before and after weight-reduction.
Table 1 The preceding 10 orders natural frequencies Order 1 2 3 4 5 6 7 8 9 10 Frequency 300.1 304.0 311.9 322.6 327.5 328.7 331.9 334.4 339.2 339.5 a) b) c) Fig.4 The vibration modes a-The first vibration mode, b-The second vibration mode, c-The ninth vibration mode Weight-reduction Optimization Design Considering the variety of economic factors of the company, to minimize the rectification of the existing wood patterns, installation foundations and the corresponding drawings, the size of the outer contour remains the same in the weight-reduction optimization design and only the wall thickness is thinned.
The comparison data is shown in Table 2.
Table 2 The comparison data of milling planer and planer milling machine (Length: mm) Product Name Driving Motor for Worktable (KW) Driving Motor for Milling Head (KW) Center Distance of two guides Load on Guide Surfaces (Kg/m) Thickness of Guide Surfaces Wall Thickness Thickness and Type of Reinforcing Plates Height of Bed Reference Machine 132 15 1300 3200 40 25 20, well-shaped 770 Milling Planer 15 7.5 900 2500 50 30 25, herringbone 700 The above data shows that the workload of the milling planer is much smaller than the reference object, structure and size that meet the reference machine can meet the milling planer theoretically.
Three-dimensional modeling method is used to calculate the exact weight of the bed and then finite element analysis is used to research the static and dynamic characteristics before and after weight-reduction.
Table 1 The preceding 10 orders natural frequencies Order 1 2 3 4 5 6 7 8 9 10 Frequency 300.1 304.0 311.9 322.6 327.5 328.7 331.9 334.4 339.2 339.5 a) b) c) Fig.4 The vibration modes a-The first vibration mode, b-The second vibration mode, c-The ninth vibration mode Weight-reduction Optimization Design Considering the variety of economic factors of the company, to minimize the rectification of the existing wood patterns, installation foundations and the corresponding drawings, the size of the outer contour remains the same in the weight-reduction optimization design and only the wall thickness is thinned.
The comparison data is shown in Table 2.
Table 2 The comparison data of milling planer and planer milling machine (Length: mm) Product Name Driving Motor for Worktable (KW) Driving Motor for Milling Head (KW) Center Distance of two guides Load on Guide Surfaces (Kg/m) Thickness of Guide Surfaces Wall Thickness Thickness and Type of Reinforcing Plates Height of Bed Reference Machine 132 15 1300 3200 40 25 20, well-shaped 770 Milling Planer 15 7.5 900 2500 50 30 25, herringbone 700 The above data shows that the workload of the milling planer is much smaller than the reference object, structure and size that meet the reference machine can meet the milling planer theoretically.
Online since: September 2013
Authors: Bing Nan Ren, Qiao Wen Yang
Then the catalyst was characterized by BET, TEM and XPS, and the catalytic activity of the catalyst for selective catalytic reduction (SCR) of NO at low-temperature was investigated.
The NO conversion was improved with reduction temperature increase under 250℃, increased slowly over 250℃.
Table 1 BET specific surface area and pore structure analysis of carbon nano tubes Samples SBET [m2/g] Pore volume [cm3/g] Mean pore size [nm] CNTs after purification 145.1517 0.776334 23.7064 2#Mn/CNTs catalyst 111.8898 0.576013 23.1726 3#Mn/CNTs catalyst 96.4381 0.490601 21.2062 It can be found that the specific surface area, pore volume, and mean pore size of catalyst all slightly decreased, but decreased significantly when compared with carrier (CNTs after purification) by making comparisons of data in Table 1, which illustrated that the metallic oxide loaded on the surface of carrier after impregnation allowed the carrier confront with severe pore blocking phenomenon leading to the specific surface area, pore volume, and mean pore size all decreased.
During the process of the experiment, within the temperature scope of 150~200℃, the consumption of NH3 was mainly for NO reduction reaction, and NO conversion rate increased rapidly.
Mn-Ce/ZSM as a new superior catalyst for NO reduction with NH3.
The NO conversion was improved with reduction temperature increase under 250℃, increased slowly over 250℃.
Table 1 BET specific surface area and pore structure analysis of carbon nano tubes Samples SBET [m2/g] Pore volume [cm3/g] Mean pore size [nm] CNTs after purification 145.1517 0.776334 23.7064 2#Mn/CNTs catalyst 111.8898 0.576013 23.1726 3#Mn/CNTs catalyst 96.4381 0.490601 21.2062 It can be found that the specific surface area, pore volume, and mean pore size of catalyst all slightly decreased, but decreased significantly when compared with carrier (CNTs after purification) by making comparisons of data in Table 1, which illustrated that the metallic oxide loaded on the surface of carrier after impregnation allowed the carrier confront with severe pore blocking phenomenon leading to the specific surface area, pore volume, and mean pore size all decreased.
During the process of the experiment, within the temperature scope of 150~200℃, the consumption of NH3 was mainly for NO reduction reaction, and NO conversion rate increased rapidly.
Mn-Ce/ZSM as a new superior catalyst for NO reduction with NH3.