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Online since: January 2013
Authors: Yong Yao, Zhao Qiang Zhang, Lin Chen, Jiong Yang
Failure Mechanism of a slope anti-sliding pile
Lin Chen1,a,Yong Yao2,b,Jiong Yang3,c, and Zhaoqiang Zhang4,d
1,2,3,4 Collage of Civil Engineering and Architecture,
Southwest University of Science and Technology, Mianyang,China
a719197246@qq.com,byy001221@163.com,cjionyang@tom.com,d52282843@qq.com
Keywords: finite element strength reduction method,anti-sliding pile,slope engineering.
Abstract:According to finite element strength reduction method,the article has discussed the failure mechanism of anti-sliding pile by using finite element software MIDAS /GTS , exploration report and anti-sliding pile design data.The comparative analysis shows that the failure of anti-siding pile is contributed by the slope excavation and rainwater.The analysis method and results can provide reference significance to other anti-sliding pile design.This paper also provide a feasible method for prediction of consequence in slope excavation.
Strength Reduction FEM.Traditional slope designing method is based on limit equilibrium method(such as the Swedish circular method, the Bishop method, the Sama method, Spence method, the unbalance thrust transmission method, etc).All of them are based on the slippery surface crack for the shapes of predetermined, but they can not reflect the soil's stress-strain relationship very well.The basic principle of the strength reduction FEM likes this : a reduction coefficient F divides the value of stick together force c and internal friction angle φ, it would get a new c ', φ '.
And then we would let the new c ', φ ' as a new parameter data to input, finishing doing this we would try to calculate.
[9] Zhen Yingren;Zhao Shangyi.Slope Stability Analysis by Strength Reduction FEM.Engineering Science.2002,4(10):58-59 [10] Concrete Structure Design Code.GB 50010-2010 The PRC of housing and urban ministry of construction.2010.8:19-24
Abstract:According to finite element strength reduction method,the article has discussed the failure mechanism of anti-sliding pile by using finite element software MIDAS /GTS , exploration report and anti-sliding pile design data.The comparative analysis shows that the failure of anti-siding pile is contributed by the slope excavation and rainwater.The analysis method and results can provide reference significance to other anti-sliding pile design.This paper also provide a feasible method for prediction of consequence in slope excavation.
Strength Reduction FEM.Traditional slope designing method is based on limit equilibrium method(such as the Swedish circular method, the Bishop method, the Sama method, Spence method, the unbalance thrust transmission method, etc).All of them are based on the slippery surface crack for the shapes of predetermined, but they can not reflect the soil's stress-strain relationship very well.The basic principle of the strength reduction FEM likes this : a reduction coefficient F divides the value of stick together force c and internal friction angle φ, it would get a new c ', φ '.
And then we would let the new c ', φ ' as a new parameter data to input, finishing doing this we would try to calculate.
[9] Zhen Yingren;Zhao Shangyi.Slope Stability Analysis by Strength Reduction FEM.Engineering Science.2002,4(10):58-59 [10] Concrete Structure Design Code.GB 50010-2010 The PRC of housing and urban ministry of construction.2010.8:19-24
Online since: September 2013
Authors: Jiang Bi Hu, Ran Li, James Tsai
All partial data affected by the presence of other vehicles was removed to maintain the most consistent experimental conditions.
Data Manipulation Data that affected the driver's physiological and psychological and driving behavior characteristics in non-tunnel lighting conditions was excluded in the 50 groups of sample data obtained in the experiments and from the 15 groups of samples in the test of car drivers in free-flow traffic conditions.
Based upon the calculation principle of the representative value, we calculated the 15 data groups shown in Table3.
(1)Relationship between CRP and LRC The relationship between the CRP and the reciprocal of the LRC in the 15 groups of sample data from the tunnel threshold zone lighting can be drawn on a scatter diagram in Fig.2.
Fig.2 Relationship between CRP and the reciprocal of LRC (2)Relationship between CRP and V The relationship between the CRP and V of the 15 sample groups of data at the tunnel threshold zone lighting is shown in the scatter diagram in Fig.3.
Data Manipulation Data that affected the driver's physiological and psychological and driving behavior characteristics in non-tunnel lighting conditions was excluded in the 50 groups of sample data obtained in the experiments and from the 15 groups of samples in the test of car drivers in free-flow traffic conditions.
Based upon the calculation principle of the representative value, we calculated the 15 data groups shown in Table3.
(1)Relationship between CRP and LRC The relationship between the CRP and the reciprocal of the LRC in the 15 groups of sample data from the tunnel threshold zone lighting can be drawn on a scatter diagram in Fig.2.
Fig.2 Relationship between CRP and the reciprocal of LRC (2)Relationship between CRP and V The relationship between the CRP and V of the 15 sample groups of data at the tunnel threshold zone lighting is shown in the scatter diagram in Fig.3.
Online since: June 2014
Authors: Qing Xin Fan, Jin Meng Li, Wei Qiu
Based on the current status of energy conservation and emission reduction in coal-fired power plant in China, this paper strives to build a more systematic and scientific evaluation index system for energy conservation and emission reduction in coal-fired power plant to assess the different level of energy conservation and emission reduction in power plant, so as to facilitate the effective management of energy conservation and emission reduction in coal-fired power plants[2].
But the lack of automatic continuous monitoring devices in the power plant makes it difficult to obtain accurate datum, so we exclude the index of mercury and its compounds, COD, BOD5 and ammonia nitrogen.
Evaluation model of coal-fired power plant energy conservation and emission reduction Taking example by the cleaner production assessment rating score calculation, we establish the energy conservation and emission reduction evaluation model, which is showed as below[5]
Assessment of China's energy-saving and emission-reduction accomplishments and opportunities during the 11th Five Year Plan[J].
Assessment of China's energy-saving and emission-reduction accomplishments and opportunities during the 11th Five Year Plan[J].
But the lack of automatic continuous monitoring devices in the power plant makes it difficult to obtain accurate datum, so we exclude the index of mercury and its compounds, COD, BOD5 and ammonia nitrogen.
Evaluation model of coal-fired power plant energy conservation and emission reduction Taking example by the cleaner production assessment rating score calculation, we establish the energy conservation and emission reduction evaluation model, which is showed as below[5]
Assessment of China's energy-saving and emission-reduction accomplishments and opportunities during the 11th Five Year Plan[J].
Assessment of China's energy-saving and emission-reduction accomplishments and opportunities during the 11th Five Year Plan[J].
Online since: January 2013
Authors: Hui Qi Zhang, Qiu Ying Li
This paper put forward the collecting method of reliability failure data and data preprocessing method including data cleaning and data analysis method, which based on the analysis of the importance and the source of failure data in the software reliability testing and the classification of software failure data.
Finally through an example, it displayed the reduction of data noises and the promotion of data quality which produced by the preprocessing methods.
And the failure data can be divided into complete failure data and incomplete failure data.
One is the standard to collect data (i.e. what kinds of data should be collected), the other is the specified process of data collection (i.e. how to collect data).
Exposure analysis In the process of collecting software failure data, it is possible to lose some data and bring in some useless data meanwhile.
Finally through an example, it displayed the reduction of data noises and the promotion of data quality which produced by the preprocessing methods.
And the failure data can be divided into complete failure data and incomplete failure data.
One is the standard to collect data (i.e. what kinds of data should be collected), the other is the specified process of data collection (i.e. how to collect data).
Exposure analysis In the process of collecting software failure data, it is possible to lose some data and bring in some useless data meanwhile.
Online since: October 2011
Authors: A. Bozorgi, A. Nourbakhsh, A. Riasi
Investigation of Effects of Changing Blade Position and Size Reduction on Performance of Axial Pump used as Turbine
1A.
In this present work, an axial pump is simulated in reverse mode by computational fluid dynamics using different turbulence models and Characteristic curves of the reverse pump are obtained for each turbulence model and are compared with experimental data.
Comparison of turbulence models results The results of all models are compared with experimental data and are shown in Figs. 3-5.
Impeller size reduction increases head, but decreases flow rates and maximum efficiency.
Lai, Hydraulic analysis of a pump as a turbine with CFD and experimental data, ImechE, Seminar Proc. of Advances of CFD in Fluid Machinery Design, 2003, London, England
In this present work, an axial pump is simulated in reverse mode by computational fluid dynamics using different turbulence models and Characteristic curves of the reverse pump are obtained for each turbulence model and are compared with experimental data.
Comparison of turbulence models results The results of all models are compared with experimental data and are shown in Figs. 3-5.
Impeller size reduction increases head, but decreases flow rates and maximum efficiency.
Lai, Hydraulic analysis of a pump as a turbine with CFD and experimental data, ImechE, Seminar Proc. of Advances of CFD in Fluid Machinery Design, 2003, London, England
Online since: December 2023
Authors: Farhanini Yusoff, Karthi Suresh
Table 1 shows the data of elemental mass for both nanocomposites, where a slight increase in mass of oxygen is seen for rGO/Fe3O4/SiO2. the mass of carbon and ferum was decreased, possibly lost during addition of SiO2 [22].
EDX mass data of nanocomposites.
The rGO/Fe3O4/SiO2/GCE possesses incomplete and discrete semicircle (Fig. 4 (a)) compared to bare GCE electrode, hence providing data that charge transfer resistance (Rct) was greater in bare GCE compared to the electrocatalyst deposited electrodes.
(a) Comparison of electrochemical impedance spectroscopy, (b) bode phase plot and (c) proposed electrochemical circuit based on Nyquist data of bare GCE, rGO/Fe3O4/GCE and rGO/Fe3O4/SiO2/GCE in 5.0 mM K4[Fe(CN)6] of 1.0 M KCl as electrolyte media.
From the obtained data through CV of ORR in Fig. 5, the electron transfer from oxygen was calculated with assist of Randles-Sevcik equation (3) as follows, (3) For the reduction of oxygen that occurs in working electrode, it was known from the calculation that the electron transfer for bare GCE, rGO/Fe3O4/GCE and rGO/Fe3O4/SiO2/GCE were 1.3, 2.3 and 3.7, respectively.
EDX mass data of nanocomposites.
The rGO/Fe3O4/SiO2/GCE possesses incomplete and discrete semicircle (Fig. 4 (a)) compared to bare GCE electrode, hence providing data that charge transfer resistance (Rct) was greater in bare GCE compared to the electrocatalyst deposited electrodes.
(a) Comparison of electrochemical impedance spectroscopy, (b) bode phase plot and (c) proposed electrochemical circuit based on Nyquist data of bare GCE, rGO/Fe3O4/GCE and rGO/Fe3O4/SiO2/GCE in 5.0 mM K4[Fe(CN)6] of 1.0 M KCl as electrolyte media.
From the obtained data through CV of ORR in Fig. 5, the electron transfer from oxygen was calculated with assist of Randles-Sevcik equation (3) as follows, (3) For the reduction of oxygen that occurs in working electrode, it was known from the calculation that the electron transfer for bare GCE, rGO/Fe3O4/GCE and rGO/Fe3O4/SiO2/GCE were 1.3, 2.3 and 3.7, respectively.
Online since: July 2012
Authors: Sheng Zhou Chen, Han Bo Zou, Wei Ming Lin, Wei Yang, Liang Wei Li
For this paper, we use the Co loading values measured by EDS analysis in the data analysis and discussion.
Fig. 3 Koutecky-Levich plots for the ORR on CoNC coated glassy carbon electrodes Fig. 3 shows the Koutecky-Levich plots for the ORR data taken at the potential from -0.1 to 0.2 V.
The data comes from the current-potential curves (Fig. 2) obtained using CoNC2.
Its approach contrasts with the theoretical plots for 2- and 4-electron reduction reaction in Fig. 3.
It could be suggested that the CoNC2 can alter the ORR reaction mechanism via both the 2-electron reduction reaction and the 4-electron reduction reaction. 2.3 Scanning electron microscopy measurement Fig. 4 shows SEM images of a sample of CoNC2 catalyst magnified 5000 and 10000 times.
Fig. 3 Koutecky-Levich plots for the ORR on CoNC coated glassy carbon electrodes Fig. 3 shows the Koutecky-Levich plots for the ORR data taken at the potential from -0.1 to 0.2 V.
The data comes from the current-potential curves (Fig. 2) obtained using CoNC2.
Its approach contrasts with the theoretical plots for 2- and 4-electron reduction reaction in Fig. 3.
It could be suggested that the CoNC2 can alter the ORR reaction mechanism via both the 2-electron reduction reaction and the 4-electron reduction reaction. 2.3 Scanning electron microscopy measurement Fig. 4 shows SEM images of a sample of CoNC2 catalyst magnified 5000 and 10000 times.
Online since: January 2014
Authors: Xiang Dong Zhao, Xian Feng Li, Feng Zhen Liu, De Li Zhao, Chang Bo Zhang, Xiu Yan Chang
Strengthen the network loss management, implementation of loss reduction measures, has become an important power supply enterprise content management one.
The Theoretical Calculation of Net Loss Distribution network is designed as closed-loop, the operation mode of open-loop characteristics, the actual operation of the distribution network mostly radial, the detailed information of each load point and component data is should be collected and collated in the distribute network ,but it is extremely difficult, also a lack of trend analysis for the load required data.
To ascertain the reasons for lifting line loss, power loss reduction and management measures developed, in net loss management departments, data would be collected carefully, want to give an accurate and timely data and statistics[3]
Reactive power compensation of power supply enterprises and users combined in the power compensation. 5) Loss Reduction and regulator combined to derogate, account regulator taken, especially for long lines, many branches, load dispersion, low power factor of the rural distribution network loss reduction is the main purpose
[3] QIN Xiaojun, Optimal Scheduling Based on Power Loss Reduction, J.
The Theoretical Calculation of Net Loss Distribution network is designed as closed-loop, the operation mode of open-loop characteristics, the actual operation of the distribution network mostly radial, the detailed information of each load point and component data is should be collected and collated in the distribute network ,but it is extremely difficult, also a lack of trend analysis for the load required data.
To ascertain the reasons for lifting line loss, power loss reduction and management measures developed, in net loss management departments, data would be collected carefully, want to give an accurate and timely data and statistics[3]
Reactive power compensation of power supply enterprises and users combined in the power compensation. 5) Loss Reduction and regulator combined to derogate, account regulator taken, especially for long lines, many branches, load dispersion, low power factor of the rural distribution network loss reduction is the main purpose
[3] QIN Xiaojun, Optimal Scheduling Based on Power Loss Reduction, J.
Online since: September 2014
Authors: Trevor A. Dean, Catrin Mair Davies, Denis J. Politis, Nicholas J. Politis, Jian Guo Lin
An experimental and numerical investigation into forming force reduction in precision gear forging
Nicholas J.
As maximum force, along with workpiece size are the two key specifications for industrial forging presses, a reduction in the load required to fully fill a die translates directly to a reduction in the capital investment cost of a production process.
Experimental true stress-plastic strain data is used up to a plastic strain of ε = 0.401, and thereafter the properties are represented using the power-law equation, σ=σy+Kεpn, where: σy=7MPa, K = 96.63 MPa, and n=0.3955.
In order to describe work hardening for strains greater than those obtained in the experiment (ε = 0.401), experimental data was extrapolated to ε = 4 using a power law model with constants: K = 96.63 MPa, and n=0.3955.
A 0.3H sized relief port allows a 45% load reduction, while wasting only 0.3% of the initial billet material.
As maximum force, along with workpiece size are the two key specifications for industrial forging presses, a reduction in the load required to fully fill a die translates directly to a reduction in the capital investment cost of a production process.
Experimental true stress-plastic strain data is used up to a plastic strain of ε = 0.401, and thereafter the properties are represented using the power-law equation, σ=σy+Kεpn, where: σy=7MPa, K = 96.63 MPa, and n=0.3955.
In order to describe work hardening for strains greater than those obtained in the experiment (ε = 0.401), experimental data was extrapolated to ε = 4 using a power law model with constants: K = 96.63 MPa, and n=0.3955.
A 0.3H sized relief port allows a 45% load reduction, while wasting only 0.3% of the initial billet material.
Online since: November 2011
Authors: Zhan Guo Liang, Jun Mu, Ji Cheng Shi
Tel:+86-411-84106890, Fax: +86-411-84106890,
E-mail: mujun@djtu.edu.cn
Keyword microbial reduction oxidation method Fe3O4 nanoparticle sulfate-reducing bacterium
Abstract By using microbial reduction combining natural oxidation method, magnetic Fe3O4 nanoparticles have been synthesized.
This paper prepared magnetic Fe3O4 nanoparticles by using microbial reduction combining natural oxidation method, the new method is first reported in this paper.
Data and information of the Figure 3 shows atomic ratio of O and Fe in the sample is approximately equal to 1.
It has stated that FeS nanoparticles is thoroughly turned into FeO nanoparticles, Figure 4 is EDS (energy dispersive spectroscopy)Spectrum and Element analysis of product , Data and information of the Figure 4 shows atomic ratio of O and Fe in the sample is approximately equal to 1.128.
SEM images of FeO and Fe3O4 Conclusions In summary, the magnetic nano Fe3O4 materials have been successfully synthesized by using microbial reduction combining natural oxidation method.
This paper prepared magnetic Fe3O4 nanoparticles by using microbial reduction combining natural oxidation method, the new method is first reported in this paper.
Data and information of the Figure 3 shows atomic ratio of O and Fe in the sample is approximately equal to 1.
It has stated that FeS nanoparticles is thoroughly turned into FeO nanoparticles, Figure 4 is EDS (energy dispersive spectroscopy)Spectrum and Element analysis of product , Data and information of the Figure 4 shows atomic ratio of O and Fe in the sample is approximately equal to 1.128.
SEM images of FeO and Fe3O4 Conclusions In summary, the magnetic nano Fe3O4 materials have been successfully synthesized by using microbial reduction combining natural oxidation method.