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Online since: July 2015
Authors: Ekathai Wirojsakunchai, Sirichai Jirawongnuson, Worathep Wachirapan, Tul Suthiprasert
Increasing O2 concentration can also improve the catalytic reduction efficiency.
It is clearly seen from both figures that once the engine is switched to DF-PCCI mode, CO emissions are substantially higher and OEM DOC is ineffective while exhaust temperatures from each combustion modes are very similar (data are not shown here but the reader can find more details in [8]).
Ranges of each parameters employing in DOE are chosen based on data from NEDC.
However, if exhaust temperature is up to 250oC, CO reduction efficiency can reach up to 100 % (case12-15) as well.
Reduction efficiency significantly improves after exhaust temperature is up to 250oC.
It is clearly seen from both figures that once the engine is switched to DF-PCCI mode, CO emissions are substantially higher and OEM DOC is ineffective while exhaust temperatures from each combustion modes are very similar (data are not shown here but the reader can find more details in [8]).
Ranges of each parameters employing in DOE are chosen based on data from NEDC.
However, if exhaust temperature is up to 250oC, CO reduction efficiency can reach up to 100 % (case12-15) as well.
Reduction efficiency significantly improves after exhaust temperature is up to 250oC.
Online since: August 2013
Authors: Jian Ming Cui, Yan Xin Ye
Intermediate K2 output data set is then sorted, and generate a new to collection, which makes all the values of the data corresponding to the same key all together.
After every Map completion of the task execution, not in a hurry to have a modifier key / value pairs to write data block file, wait for the member function call the combine, and then they have local reduction operation as an input.
The comparison of the two MapReduce algorithm for data classification experiments, the use of data by type of training method effectively improve the speedup can be found.
After the experimental data show that the entire data classification accuracy and classification efficiency has been greatly improved.
Therefore, the next work for the introduction of a new classification algorithm massive data classification research, to further improve the efficiency and accuracy of the massive data classification.
After every Map completion of the task execution, not in a hurry to have a modifier key / value pairs to write data block file, wait for the member function call the combine, and then they have local reduction operation as an input.
The comparison of the two MapReduce algorithm for data classification experiments, the use of data by type of training method effectively improve the speedup can be found.
After the experimental data show that the entire data classification accuracy and classification efficiency has been greatly improved.
Therefore, the next work for the introduction of a new classification algorithm massive data classification research, to further improve the efficiency and accuracy of the massive data classification.
Online since: August 2013
Authors: Jian Hua Xiao, Xue Hui Li, Le Fu Wang
Mn/Ba/Al2O3 indicated high activity of NO oxidation and NOx storage in the oxidation-storage reaction and certain reduction activity in the storage-reduction reaction.
Table 1 Catalyst formulations Catalyst Pt loading/% Ba loading/% Mn loading/% Mn/Ba/Al2O3 — 15.0 5.0 Pt/Ba/Al2O3 1.0 15.0 — Mn/Ba/Al2O3-Pt/Ba/Al2O3 0.5 15.0 5.0 Mn/Ba/Al2O3+Pt/Ba/Al2O3 0.5 15.0 5.0 2.2 NO Oxidation-storage The NO oxidation-storage activity data were obtained using a conventional fixed-bed flow reactor at atmospheric pressure.
The storage-reduction reaction performed 2 h, namely 10 cycles.
NOx storage-reduction catalysts for gasoline engines.
NOx storage-reduction over combined catalyst Mn/Ba/Al2O3-Pt/Ba/Al2O3.
Table 1 Catalyst formulations Catalyst Pt loading/% Ba loading/% Mn loading/% Mn/Ba/Al2O3 — 15.0 5.0 Pt/Ba/Al2O3 1.0 15.0 — Mn/Ba/Al2O3-Pt/Ba/Al2O3 0.5 15.0 5.0 Mn/Ba/Al2O3+Pt/Ba/Al2O3 0.5 15.0 5.0 2.2 NO Oxidation-storage The NO oxidation-storage activity data were obtained using a conventional fixed-bed flow reactor at atmospheric pressure.
The storage-reduction reaction performed 2 h, namely 10 cycles.
NOx storage-reduction catalysts for gasoline engines.
NOx storage-reduction over combined catalyst Mn/Ba/Al2O3-Pt/Ba/Al2O3.
Online since: May 2012
Authors: De Rong Zeng, Tie Jun Wang
Finally, a reduction factor formula of the ultimate bearing capacity of the tube before and after deformation is gotten; it directly reflected the reduction level of the ultimate bearing capacity of the deformed steel tube.
In this paper, the ultimate bearing capacity reduction level that is caused by the deformation is researched.
Ultimate bearing capacity reduction factor 1) Theory reduction factor The ultimate bearing capacity reduction factor is gotten by (9) and (10) the ratio: (11) 2) Reduction factor of the finite element model From formula (6) and (7), we can obtain the Ultimate bearing capacity reduction factor: (12) From equations (11) and (12), we can see the results are consistent by comparing theoretical calculations with the finite element model calculation data.
The formula (11) above derivation of reduction factor can be used to approximately calculated reduction factor of the type of the deformed steel tube.
Both model data comparison shows that the degree of the ultimate bearing capacity reduction is similar.
In this paper, the ultimate bearing capacity reduction level that is caused by the deformation is researched.
Ultimate bearing capacity reduction factor 1) Theory reduction factor The ultimate bearing capacity reduction factor is gotten by (9) and (10) the ratio: (11) 2) Reduction factor of the finite element model From formula (6) and (7), we can obtain the Ultimate bearing capacity reduction factor: (12) From equations (11) and (12), we can see the results are consistent by comparing theoretical calculations with the finite element model calculation data.
The formula (11) above derivation of reduction factor can be used to approximately calculated reduction factor of the type of the deformed steel tube.
Both model data comparison shows that the degree of the ultimate bearing capacity reduction is similar.
Online since: October 2014
Authors: Wen Long Lu, Chun Xin Dong, Ji Ying Zou, Jing Hai Guo, Hui Liu, Ying Hua Li
The performance of these catalysts for NOx reduction with CO is shown in Fig. 3.
The order of catalytic activity in the reduction of NOx with CO was Pd>Ir>Rh.
Reduction of NOx over 2.0 wt.% Pd/TiO2/Al2O3 with various TiO2 loadings.
BET data of every sample are listed in Table 1.
BET data of various samples Samples BET area (m2/g) Pore volume (cm3/g) Pore size (Å) γ-Al2O3 264 0.51 74.6 10 wt.% TiO2/Al2O3 230 0.42 69.6 15 wt.% TiO2/Al2O3 154 0.41 103.2 2.0 wt.% Pd/Al2O3 219 0.44 76.9 2.0 wt.% Pd/TiO2/Al2O3 187 0.42 85.7 2.0 wt.% Ir/Al2O3 212 0.43 78.2 2.0 wt.% Ir/TiO2/Al2O3 182 0.41 85.6 2.0 wt.% Rh/Al2O3 237 0.50 80.4 2.0 wt.% Rh/TiO2/Al2O3 209 0.47 85.2 Conclusions The sequence of catalytic activity for the NOx reduction in the CO-rich conditions of simulated post Euro-Ⅳ diesel emissions at low temperature was Pd>Ir>Rh.
The order of catalytic activity in the reduction of NOx with CO was Pd>Ir>Rh.
Reduction of NOx over 2.0 wt.% Pd/TiO2/Al2O3 with various TiO2 loadings.
BET data of every sample are listed in Table 1.
BET data of various samples Samples BET area (m2/g) Pore volume (cm3/g) Pore size (Å) γ-Al2O3 264 0.51 74.6 10 wt.% TiO2/Al2O3 230 0.42 69.6 15 wt.% TiO2/Al2O3 154 0.41 103.2 2.0 wt.% Pd/Al2O3 219 0.44 76.9 2.0 wt.% Pd/TiO2/Al2O3 187 0.42 85.7 2.0 wt.% Ir/Al2O3 212 0.43 78.2 2.0 wt.% Ir/TiO2/Al2O3 182 0.41 85.6 2.0 wt.% Rh/Al2O3 237 0.50 80.4 2.0 wt.% Rh/TiO2/Al2O3 209 0.47 85.2 Conclusions The sequence of catalytic activity for the NOx reduction in the CO-rich conditions of simulated post Euro-Ⅳ diesel emissions at low temperature was Pd>Ir>Rh.
Online since: June 2015
Authors: Lei Shi
As 2 waste-water treatment stations operation results have shown, during the passed 6 years, annual sludge reduction ratios (per tons product) reach 43.64% and 50.29% respectively, realizing 105.6 thousands tons of sludge reduction effect and 68.04 millions CNY economic benefits.
The results show that sludge pellet reduction, reduction swelling index, compressive strength and leaching toxicity to meet the requirements, but its softening melting property is poor.
Therefore, the sludge pellet and sinter ore, lump ore are mixed by the ratio of 10:85:5, and its softening melting property is 1508 ℃ with the melting interval is 111 ℃, the maximum differential pressure is 3103Pa, meeting the requirements of blast furnace. 3)Sludge amount reduction effect During Sept., 2010~Feb,2014, sludge amount reduction technical transformation project have been carried out with 57,576 tons sludge reduction achievement(based on the basic data that per ton steel produces 50.18 kg mixed sludge, theoretical sludge amount is 114,487 tons,while actual sludge amount is 56,911 tons), reduction ratio reaches 50.29%,and annual sludge reduces 16,450 tons.
Based on the basic data that per ton steel produces 17.49 kg mixed sludge, during Sept., 2011~Feb,2014, theoretical sludge amount is 93,594 tons,while actual sludge amount is 60,503 tons, sludge reduction ratio reaches 35.36%,and annual sludge reduces 13,000 tons. 2)Recovery of waste sulfuric acid : During Sept., 2011~ Feb,2014, 5224 m3 waste sulfuric acid has been taken out from wastewater to produce polymeric ferric sulfate (water purifying agent), obtaining multiple benefits, such as wastewater neutralization agent saving, sludge amount reduction, acid raw material purchase cost saving,etc. multiple benefits. 4.
During the passed 6 years(A Plant, 2.5 years; B Plant, 3.5 years), annual sludge reduction ratios (per tons product) reach 43.64% and 50.29% respectively, realizing 105.6 thousands tons of sludge amount reduction and 68.04 millions CNY economic benefits.
The results show that sludge pellet reduction, reduction swelling index, compressive strength and leaching toxicity to meet the requirements, but its softening melting property is poor.
Therefore, the sludge pellet and sinter ore, lump ore are mixed by the ratio of 10:85:5, and its softening melting property is 1508 ℃ with the melting interval is 111 ℃, the maximum differential pressure is 3103Pa, meeting the requirements of blast furnace. 3)Sludge amount reduction effect During Sept., 2010~Feb,2014, sludge amount reduction technical transformation project have been carried out with 57,576 tons sludge reduction achievement(based on the basic data that per ton steel produces 50.18 kg mixed sludge, theoretical sludge amount is 114,487 tons,while actual sludge amount is 56,911 tons), reduction ratio reaches 50.29%,and annual sludge reduces 16,450 tons.
Based on the basic data that per ton steel produces 17.49 kg mixed sludge, during Sept., 2011~Feb,2014, theoretical sludge amount is 93,594 tons,while actual sludge amount is 60,503 tons, sludge reduction ratio reaches 35.36%,and annual sludge reduces 13,000 tons. 2)Recovery of waste sulfuric acid : During Sept., 2011~ Feb,2014, 5224 m3 waste sulfuric acid has been taken out from wastewater to produce polymeric ferric sulfate (water purifying agent), obtaining multiple benefits, such as wastewater neutralization agent saving, sludge amount reduction, acid raw material purchase cost saving,etc. multiple benefits. 4.
During the passed 6 years(A Plant, 2.5 years; B Plant, 3.5 years), annual sludge reduction ratios (per tons product) reach 43.64% and 50.29% respectively, realizing 105.6 thousands tons of sludge amount reduction and 68.04 millions CNY economic benefits.
Online since: February 2014
Authors: Naveed Ur Rehman, Lei Zhang, Muhammad Zahid Hammad, Emmanuel Anania Mwangosi
The rapid growth within the field of digital communication during the recent years expanded the need for high-speed data transmission to support a wide range of services such as: video, data and voice in wireless communication systems, etc.
One data symbol is modulated into a group of adjacent sub carriers with a group of weighting coefficients.
In a basic communication system, the data are modulated onto a single carrier frequency.
If the data symbol “a” is modulated into the 1st sub-carrier, then “-a” is modulated into the 2nd sub-carrier.
Then the resultant data sequence is used for making symbol decision.
One data symbol is modulated into a group of adjacent sub carriers with a group of weighting coefficients.
In a basic communication system, the data are modulated onto a single carrier frequency.
If the data symbol “a” is modulated into the 1st sub-carrier, then “-a” is modulated into the 2nd sub-carrier.
Then the resultant data sequence is used for making symbol decision.
Online since: March 2015
Authors: Xian Zheng Gong, Yao Li, Zhi Hong Wang, Yu Liu, Fei Fei Shi
These data include resource consumption, energy consumption and carbon emissions as shown in Table 1.
The data of energy consumption and carbon emission on the extraction of limestone, clay and sandstone were obtained from Eco-invent data base [8].
For gypsum mining, the data developed by Ma [9] was adopted.
In addition, the data of steel production were derived from the study carried out by Wang [10].
The data of raw coal mining and crude oil extraction were from Sinocenter data-base [14].
The data of energy consumption and carbon emission on the extraction of limestone, clay and sandstone were obtained from Eco-invent data base [8].
For gypsum mining, the data developed by Ma [9] was adopted.
In addition, the data of steel production were derived from the study carried out by Wang [10].
The data of raw coal mining and crude oil extraction were from Sinocenter data-base [14].
Online since: January 2016
Authors: Mohamed Wahab Mohamed Hisham, Tengku Shafazila Tengku Saharuddin, Rizafizah Othaman, Fairous Salleh, Alinda Samsuri, Mohd Ambar Yarmo
The reduction behaviour of tungsten oxide have been studied by using temperature programmed reduction (TPR) and X-ray diffraction (XRD).
The reduction behavior was examined by a nonisothermal reduction up to 900 ºC then continued with isothermal reduction at 900 ºC for 15, 30 and 45 min time under (40% v/v) carbon monoxide in nitrogen (CO in N2) atmosphere.
For identification purposes of crystalline phase composition, diffraction pattern obtained were matched with standard diffraction data (JCPDS) files.
Reduction step WO3 → WO2.92 was not detected due to low signal.
The reduction was varied with different reaction holding time.
The reduction behavior was examined by a nonisothermal reduction up to 900 ºC then continued with isothermal reduction at 900 ºC for 15, 30 and 45 min time under (40% v/v) carbon monoxide in nitrogen (CO in N2) atmosphere.
For identification purposes of crystalline phase composition, diffraction pattern obtained were matched with standard diffraction data (JCPDS) files.
Reduction step WO3 → WO2.92 was not detected due to low signal.
The reduction was varied with different reaction holding time.
Online since: December 2013
Authors: Bin Tao Zhang
Automotive Reclaiming Energy Vibration Reduction System Based on Electric Control Rectifying Valve
Bintao Zhanga
School of Automobile Engineering, Wuhan University of Technology, Wuhan 430000, China
abintao3722@126.com
Key words: vibration reduction system; energy recovery; rectifying valve; energy conservation and pollution reduction
Abstract.
This paper will present Automotive Reclaiming Energy Vibration Reduction System Based on Electric Control Rectifying Valve in 7 parts.
These data show that the system can significantly reduce cars’ fossil fuels consumption, and will alleviate the energy crisis effectively.
Therefore, this system is very potential in energy conservation and pollution reduction and can bring great economic benefits.
In summary, automotive reclaiming energy vibration reduction system based on electric control rectifying valve is a reliable, efficient, and great prospective vehicle vibration energy recovery system, with positive meaning to the popularity of green energy and energy conservation and pollution reduction.
This paper will present Automotive Reclaiming Energy Vibration Reduction System Based on Electric Control Rectifying Valve in 7 parts.
These data show that the system can significantly reduce cars’ fossil fuels consumption, and will alleviate the energy crisis effectively.
Therefore, this system is very potential in energy conservation and pollution reduction and can bring great economic benefits.
In summary, automotive reclaiming energy vibration reduction system based on electric control rectifying valve is a reliable, efficient, and great prospective vehicle vibration energy recovery system, with positive meaning to the popularity of green energy and energy conservation and pollution reduction.