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Online since: December 2014
Authors: Yu Zhen Zhao
In the eyes of Bohringer C and Helm (2008), developing countries should be fully supported in capital and technology for their emission reduction.
The data of China’s coal, oil and natural gas consumption quantity come from the database of China National Knowledge Infrastructure (CNKI) with the unit of ten thousand tons standard coal.
Stationary Test for the Data Data used in this paper include the four time series of the consumption quantity of China’s coal, oil and natural gas, and the environmental quality of China during 1995-2012.
In the time series model, spurious regression can exist between two sets of data that have no relationship with each other.
Therefore, it is necessary to conduct stationary test on the data.
The data of China’s coal, oil and natural gas consumption quantity come from the database of China National Knowledge Infrastructure (CNKI) with the unit of ten thousand tons standard coal.
Stationary Test for the Data Data used in this paper include the four time series of the consumption quantity of China’s coal, oil and natural gas, and the environmental quality of China during 1995-2012.
In the time series model, spurious regression can exist between two sets of data that have no relationship with each other.
Therefore, it is necessary to conduct stationary test on the data.
Online since: August 2013
Authors: Feng Wang, Zong De Fang
The results show that the mode shapes get from ANSYS analysis are consistent with the datas of experimental measurements, and the maximum deviation of natural frequency between experiment and theory is blew 15%.
Gearbox Modal Analysis by ANSYS The commonly used modal extraction methods of ANSYS are: The Block Lanczos law, Subspace method, Power Dynamics method, The reduction method, Asymmetric method and QR damping law.
The Block Lanczos law is very effective in Extracting large, medium-sized modal; Subspace method is more suitable for the extraction modes less than 40 order model, and requires a relatively small computer memory; As a result of the PCG iterative solver, the speed of Power Dynamics method is significantly better than the Block Lanczos method and the subspace methods; The reduction method is suitable for the model does not contain local vibration caused by a concentrated mass; Asymmetric method and QR damping law are applicable to non-symmetric stiffness and mass matrix (for example, the acoustic fluid - structure coupling problem) [5].
In the pilot test, frequency response of the system is generally obtained through the power spectral density function such as Eq.4. . (4) In order to evaluate the datas quality is good or bad, that the result of Eq.5 is reliable when the coherence function value is greater than 0.95. . (5) Here, SFX is input and output cross-power spectrum; SXX is self power spectrum of the system input; SFF is self power spectrum of the system vibration response.
The mode shape results get from ANSYS analysis are consistent with the datas of experimental measurements, and the maximum deviation of natural frequency between experiment and theory is blew 15%.
Gearbox Modal Analysis by ANSYS The commonly used modal extraction methods of ANSYS are: The Block Lanczos law, Subspace method, Power Dynamics method, The reduction method, Asymmetric method and QR damping law.
The Block Lanczos law is very effective in Extracting large, medium-sized modal; Subspace method is more suitable for the extraction modes less than 40 order model, and requires a relatively small computer memory; As a result of the PCG iterative solver, the speed of Power Dynamics method is significantly better than the Block Lanczos method and the subspace methods; The reduction method is suitable for the model does not contain local vibration caused by a concentrated mass; Asymmetric method and QR damping law are applicable to non-symmetric stiffness and mass matrix (for example, the acoustic fluid - structure coupling problem) [5].
In the pilot test, frequency response of the system is generally obtained through the power spectral density function such as Eq.4. . (4) In order to evaluate the datas quality is good or bad, that the result of Eq.5 is reliable when the coherence function value is greater than 0.95. . (5) Here, SFX is input and output cross-power spectrum; SXX is self power spectrum of the system input; SFF is self power spectrum of the system vibration response.
The mode shape results get from ANSYS analysis are consistent with the datas of experimental measurements, and the maximum deviation of natural frequency between experiment and theory is blew 15%.
Online since: November 2011
Authors: Peng Chen, Ai Qin Tian, Yong Hong Chen
The numerical results showed that the simulation data agree well with experimental test data.
Contralateral welding The same side welding Fig.7 Stress of W1 at different time Fig.8 Stress curve of welding Figure 7 indicates that the welding of W3 on the same side has little effect on W1, while the contralateral welding of W2 leads to the longitudinal stress reduction of W1 and residual stress of W1 varies greatly.
In the first welding sequence, welding of W2 leads to the temperature of materials near seam zone of W1 to above 200 ℃, which is equivalent to a post-processing, leading to longitudinal stress reduction of W1.
Contralateral welding The same side welding Fig.7 Stress of W1 at different time Fig.8 Stress curve of welding Figure 7 indicates that the welding of W3 on the same side has little effect on W1, while the contralateral welding of W2 leads to the longitudinal stress reduction of W1 and residual stress of W1 varies greatly.
In the first welding sequence, welding of W2 leads to the temperature of materials near seam zone of W1 to above 200 ℃, which is equivalent to a post-processing, leading to longitudinal stress reduction of W1.
Online since: January 2013
Authors: Cai Min Chen, Bao Hua Li, Chang Hong Wang, Rui Liu
In order to take full advantage of high precision information of star sensor, many scholars use inertial equipment to provide horizontal datum to realize autonomous positioning of star sensor.
Because of limitations of inertial equipment components and platform control method, it is difficult to realize platform datum completely horizontal by dynamic control, which leads to a precision reduction in horizontal datum.
Furthermore, the precision reduction in horizontal datum will lead to a precision reduction in navigation system.
Horizontal datum limit has become a bottleneck of star sensor navigation.
Because of limitations of inertial equipment components and platform control method, it is difficult to realize platform datum completely horizontal by dynamic control, which leads to a precision reduction in horizontal datum.
Furthermore, the precision reduction in horizontal datum will lead to a precision reduction in navigation system.
Horizontal datum limit has become a bottleneck of star sensor navigation.
Preparation of Three Different Sphere-Like Au/CeO2 Catalysts and their Activity for the CO Oxidation
Online since: November 2010
Authors: Guang Sheng Guo, Fu Bo Gu, Lei Wang, Zhi Hua Wang
The peaks may be the reductions of Au cations species.
And the hollow sphere sample has a intensive peak at 520°C, attributing to the removal of ceria surface oxygen, the nanospherical cluster distinctly weaker, and no obvious reduction peaks appeared up to 520 °C for flowerlike sphere catalyst.
All samples exhibit a broad reduction peak at 800-850°C, which is associated with further reduction of the bulk material. 3.2.
The data in Fig. 7 indicate that the CO oxidation activity of CeO2-hollow sphere is higher than CeO2-flowerlike sphere and the nano-spherical cluster is the lowest.
It can be explained by the TPR results, hollow sphere sample has a intensive peak at 520°C, attributing to the removal of ceria surface oxygen which implies the hollow sphere ceria has more reduction activity.
And the hollow sphere sample has a intensive peak at 520°C, attributing to the removal of ceria surface oxygen, the nanospherical cluster distinctly weaker, and no obvious reduction peaks appeared up to 520 °C for flowerlike sphere catalyst.
All samples exhibit a broad reduction peak at 800-850°C, which is associated with further reduction of the bulk material. 3.2.
The data in Fig. 7 indicate that the CO oxidation activity of CeO2-hollow sphere is higher than CeO2-flowerlike sphere and the nano-spherical cluster is the lowest.
It can be explained by the TPR results, hollow sphere sample has a intensive peak at 520°C, attributing to the removal of ceria surface oxygen which implies the hollow sphere ceria has more reduction activity.
Online since: March 2017
Authors: Faridah Yusof, Nadzril Sulaiman, Mohammad Omer Faruck, Silvia Chowdhury
The reduction process begins with the colour change and the solution turns pale yellow.
Compactness and availability of shell layer was proven both by direct microscopic data from TEM and HRTEM of Ag@Pt NPs together with optical properties obtained from UV-vis.
Zhu, "Core@ shell sub-ten-nanometer noble metal nanoparticles with a controllable thin Pt shell and their catalytic activity towards oxygen reduction," Nano Research, vol. 8, pp. 271-280, 2015
Stamenkovic, "Advanced platinum alloy electrocatalysts for the oxygen reduction reaction," Acs Catalysis, vol. 2, pp. 891-898, 2012
Harke, "Synthesis of silver nanoparticles by chemical reduction and their antimicrobial activity," in International Journal of Engineering Research and Technology, 2012.
Compactness and availability of shell layer was proven both by direct microscopic data from TEM and HRTEM of Ag@Pt NPs together with optical properties obtained from UV-vis.
Zhu, "Core@ shell sub-ten-nanometer noble metal nanoparticles with a controllable thin Pt shell and their catalytic activity towards oxygen reduction," Nano Research, vol. 8, pp. 271-280, 2015
Stamenkovic, "Advanced platinum alloy electrocatalysts for the oxygen reduction reaction," Acs Catalysis, vol. 2, pp. 891-898, 2012
Harke, "Synthesis of silver nanoparticles by chemical reduction and their antimicrobial activity," in International Journal of Engineering Research and Technology, 2012.
Online since: December 2018
Authors: Sara Verusca de Oliveira, Fábio Roberto Passador, C.M. Correia Pereira, E.A. dos Santos Filho, Edcleide Maria Araújo
The flammability data reported here are the averages of five samples.
For systems with OMMT this reduction is approximately between 12 and 22%.
The reduction of the HRR peak of the systems with OMMT and FRP loads is quite significant in relation to PE.
Table 1 - Cone Calorimeter data in incident heat flux of 50 kWm-2, for PE and its systems.
The data showed the efficiency of the quaternary ammonium salt in the clay organophilization and that the Brazilian clay can be used as nanoparticle in PE nanocomposites.
For systems with OMMT this reduction is approximately between 12 and 22%.
The reduction of the HRR peak of the systems with OMMT and FRP loads is quite significant in relation to PE.
Table 1 - Cone Calorimeter data in incident heat flux of 50 kWm-2, for PE and its systems.
The data showed the efficiency of the quaternary ammonium salt in the clay organophilization and that the Brazilian clay can be used as nanoparticle in PE nanocomposites.
Online since: June 2011
Authors: Matsunori Nara
However, enough inventory data doesn't exist to do LCA of the infrastructure.
There are covering and a list in data because the data of each section that classifies the productive activity of the entire Japan from this inter-industry relations table is calculated.
Moreover, the latest data can be reflected in this environmental impact information at any time.
That is, the data of the inter-industry relations table can be used when there is no data of the buildup method.
iii) Necessity of proof of display by proof data etc.
There are covering and a list in data because the data of each section that classifies the productive activity of the entire Japan from this inter-industry relations table is calculated.
Moreover, the latest data can be reflected in this environmental impact information at any time.
That is, the data of the inter-industry relations table can be used when there is no data of the buildup method.
iii) Necessity of proof of display by proof data etc.
In Situ Synthesis of Cu-SAPO-34/Cordierite with Ultrasonic Treatment and its Property of NOx Removal
Online since: January 2013
Authors: Li Ping Chang, Jian Cheng Wang, Wei Ren Bao, Zhi Juan Gao
The reason for the de-NOx SCR activities decrease on two aged samples and the higher anti-aging performance of the sample with ultrasonic treatment could be deduced by XRD and SEM data.
Elsener, Selective catalytic reduction of NO and NO2 at low temperatures, Catal.
Yang, Low-temperature selective catalytic reduction of NO with NH3 over iron and manganese oxides supported on titania, Appl.
Lauterbach, et al., The ammonia selective catalytic reduction activity of copper-exchanged small-pore zeolites, Appl.
Hadama, et al., Copper Ion-Exchanged SAPO-34 as a Thermostable Catalyst for Selective Reduction of NO with C3H6, J.
Elsener, Selective catalytic reduction of NO and NO2 at low temperatures, Catal.
Yang, Low-temperature selective catalytic reduction of NO with NH3 over iron and manganese oxides supported on titania, Appl.
Lauterbach, et al., The ammonia selective catalytic reduction activity of copper-exchanged small-pore zeolites, Appl.
Hadama, et al., Copper Ion-Exchanged SAPO-34 as a Thermostable Catalyst for Selective Reduction of NO with C3H6, J.
Online since: July 2013
Authors: Gert de Sitter, Wout Weitjens, Mahmoud El-Kafafy, Christof Devriendt
The data-acquisition system is mounted in the transition piece.
The data-acquisition software allows the continuous monitoring of accelerations.
All data receive a time-stamp in order to be able to correlate them with the SCADA and meteo data.
In Fig. 3 the SCADA data for the monitoring period are shown.
In this paper a total of 2016 data sets have been analyzed.
The data-acquisition software allows the continuous monitoring of accelerations.
All data receive a time-stamp in order to be able to correlate them with the SCADA and meteo data.
In Fig. 3 the SCADA data for the monitoring period are shown.
In this paper a total of 2016 data sets have been analyzed.