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Online since: June 2012
Authors: Xiao Hui Cao, Li Li Qin
By calculating indicator diagram or processing the data of actual indicator diagram, a set of data can be output with every 10 degrees crankshaft angle.
Running steps are 288, and loading the gas pressure of the engine at piston’s barycenter with spline data function.
Optimization of profile for reduction of piston slap excitation[C].SAE 2004-01-4309,2004
Running steps are 288, and loading the gas pressure of the engine at piston’s barycenter with spline data function.
Optimization of profile for reduction of piston slap excitation[C].SAE 2004-01-4309,2004
Online since: December 2012
Authors: Jian Zheng Song, Shuai Jie Wang, Nan Nan Di
The adsorption kinetics was studied with the experimental data.
The data were fitted with the pseudo -first order and pseudo-second order kinetic model of Lagergren respectively.
The degradation kinetics of the three pyrethroids in coastal sediments were studied with the experimental data(Table 2).
Therefore, it could be speculated that the degradation of pyrethriod in coastal sediments is reduction reaction, and the possible pathway is shown in Fig.4(with fenpropathrin as sample): Fig.4 The possible anoxic degradation pathway of fenpropathrin in coastal sediment That is, pyrethroids are hydrolyzed at ester bond firstly, and then lose electrons to become m- phenoxyphenyl-acetonitril.
The data were fitted with the pseudo -first order and pseudo-second order kinetic model of Lagergren respectively.
The degradation kinetics of the three pyrethroids in coastal sediments were studied with the experimental data(Table 2).
Therefore, it could be speculated that the degradation of pyrethriod in coastal sediments is reduction reaction, and the possible pathway is shown in Fig.4(with fenpropathrin as sample): Fig.4 The possible anoxic degradation pathway of fenpropathrin in coastal sediment That is, pyrethroids are hydrolyzed at ester bond firstly, and then lose electrons to become m- phenoxyphenyl-acetonitril.
Online since: March 2004
Authors: In Sup Kim, Seong Moon Seo, Chang Yong Jo
Effects of grain refinement on LCF behavior of CM247LC at 760 � were found to be reduction
of data scatter and increase of minimum
fatigue life.
The relatively wide band of fatigue data with CG specimens might be attributed to the anisotropy in deformation of Ni-base superalloys [2,3].
Due to anisotropic deformation characteristics, FG specimen may have relatively uniform LCF lives compared with large band of data scatter in CG specimen.
The relatively wide band of fatigue data with CG specimens might be attributed to the anisotropy in deformation of Ni-base superalloys [2,3].
Due to anisotropic deformation characteristics, FG specimen may have relatively uniform LCF lives compared with large band of data scatter in CG specimen.
Online since: May 2007
Authors: Bin Chen, Xiang Guo Zeng, X. Peng, X. Wu, S. Chen
The results obtained in the analyses agree well with experimental
data.
Taking tensile loading as an example, because w(f) is a monotonically decreasing function, and all other quantities in Eq. (6) are positive, the increase in the void volume fraction f results in a reduction in the deviatoric stress ijds .
The computed results will be compared with test data.
The experimental data were obtained from tensile tests conducted on an Instron 1342 material testing system.
Taking tensile loading as an example, because w(f) is a monotonically decreasing function, and all other quantities in Eq. (6) are positive, the increase in the void volume fraction f results in a reduction in the deviatoric stress ijds .
The computed results will be compared with test data.
The experimental data were obtained from tensile tests conducted on an Instron 1342 material testing system.
Online since: July 2010
Authors: M. Shaheer Akhtar, Ui Yeon Kim, Dae Jin Choi, O Bong Yang
The decreased
intensities of FT-IR and 1HNMR peaks are ascribed to the scission of chain and reduction of
molecular weight of PEO by irradiation.
This results are consistence with FTIR and 1HNMR data.
It is consistent with DSC data (Table 1).
Table 1 Physiochemical properties of PEO polymer (DSC), PEO-TiO2 composite electrolyte (conductivity) and photovoltaic perfromance of fabcriated DSSCs (PV data). 1PEO polymer properties before and after irradiation 2Properties of PEO-TiO2 composite electrolytes prepared by irradiated PEO except raw PEO Summary The e-beam irradiation technique was found to be an effective method to improve and modify the morphological and structural properties of PEO-TiO2 composite electrolytes for dye-sensitized solar cell (DSSC).
This results are consistence with FTIR and 1HNMR data.
It is consistent with DSC data (Table 1).
Table 1 Physiochemical properties of PEO polymer (DSC), PEO-TiO2 composite electrolyte (conductivity) and photovoltaic perfromance of fabcriated DSSCs (PV data). 1PEO polymer properties before and after irradiation 2Properties of PEO-TiO2 composite electrolytes prepared by irradiated PEO except raw PEO Summary The e-beam irradiation technique was found to be an effective method to improve and modify the morphological and structural properties of PEO-TiO2 composite electrolytes for dye-sensitized solar cell (DSSC).
Online since: January 2006
Authors: Alexander Korshunov, A.A. Smolyakov, Irina Vedernikova, Lev Polyakov, Tamara Kravchenko, V.P. Solovyev
Thus, the data on mechanical properties are integral values, which - although they
represent general regularities - cannot make it clear to what extent mechanical properties across the
sample are changed after ECAP.
Elongation (δ5) distribution across the sample: ∆ upside (Z=2.6 mm), ○ middle (Z=0.0 mm), □ downside (Z=−2.6 mm) In comparing the data of Fig. 2 and Figs. 3-5, one should note that the strength properties (tensile strength and conventional yield strength) measured in standard and small-size specimens are practically identical irrespective of the pressing route and the number of passes.
This is attributed to the size effect, which manifests itself in the decrease in plasticity with the reduction of the specimens' size [3].
The data of Figs. 3-5 show that the strength properties in the initial-state material are distributed highly uniformly, whereas elongation has considerable heterogeneity.
Elongation (δ5) distribution across the sample: ∆ upside (Z=2.6 mm), ○ middle (Z=0.0 mm), □ downside (Z=−2.6 mm) In comparing the data of Fig. 2 and Figs. 3-5, one should note that the strength properties (tensile strength and conventional yield strength) measured in standard and small-size specimens are practically identical irrespective of the pressing route and the number of passes.
This is attributed to the size effect, which manifests itself in the decrease in plasticity with the reduction of the specimens' size [3].
The data of Figs. 3-5 show that the strength properties in the initial-state material are distributed highly uniformly, whereas elongation has considerable heterogeneity.
Online since: July 2014
Authors: Guo Shun You, Xiang Zhen Han
Pointwise cross-section data are used in MCNP.
Important standard features that make MCNP very versatile and easy to use include a powerful general source, criticality source, and surface source; both geometry and output tally plotters; a rich collection of variance reduction techniques; a flexible tally structure; and an extensive collection of cross-section data.
Data in Table 1 show that the spent fuel pool keff is the maximum of 0.8729 when the density of water is assumed 1.0g/cm3 at normal storage condition.
Important standard features that make MCNP very versatile and easy to use include a powerful general source, criticality source, and surface source; both geometry and output tally plotters; a rich collection of variance reduction techniques; a flexible tally structure; and an extensive collection of cross-section data.
Data in Table 1 show that the spent fuel pool keff is the maximum of 0.8729 when the density of water is assumed 1.0g/cm3 at normal storage condition.
Online since: July 2014
Authors: Xiao Feng Xie, Jia Yong Han, Liang Xing, Yuan Liang Liu
Overview of high steep rock slope engineering
There was a rock slope engineering in Guangdong Province, the height is about 130m and length is about 302m, according to engineering survey data show that the overburden of bedrock is artificial fill soil and slope residual soil, its thickness is 2.30 ~ 8.45m, the lithology of bedrock are: shale, sandstone, geological conditions is complex, rock boundaries, fractures, weak structural plane are staggered, and there are another two through fractures F1 and F2, F1is major fracture, trending toward is NE9°, the tendency is NW279°, the average angle is 78°; F2 fault: trending toward is NW316°, the tendency is SW226°, dip 78°.
3D modeling of high steep rock slope
Midas GTS is an excellent finite element method (FEM) 3D numerical simulation software in engineering field which has fast and intuitive three dimensional modeling, rapid and very powerful ability in mesh generation, professional geotechnical analysis capabilities and intuitive analysis
According to the water table for each drill hole sectional view of survey data, a cross section water line is drawn, while the groundwater pressure is as external load, directly on the slope structure, it is in order to achieve a common effect of rainfall and the water table.
Earthquake time curve Using the strength reduction method, rock slope is three dimensional analyzed under its own weight, heavy rainfall, earthquake three conditions effect, obtained the safety factor, the maximum shear strain (potential slip surface) of slope, shown in Figure 6~10.
Verified by actual monitoring data show that the calculated results are accordance with reality.
According to the water table for each drill hole sectional view of survey data, a cross section water line is drawn, while the groundwater pressure is as external load, directly on the slope structure, it is in order to achieve a common effect of rainfall and the water table.
Earthquake time curve Using the strength reduction method, rock slope is three dimensional analyzed under its own weight, heavy rainfall, earthquake three conditions effect, obtained the safety factor, the maximum shear strain (potential slip surface) of slope, shown in Figure 6~10.
Verified by actual monitoring data show that the calculated results are accordance with reality.
Online since: July 2014
Authors: Wei Zhao, Jian Chao Zhang, Xiao Rong Zhu
Reactive power and voltage coordinated control strategy
Figure1 Wind farm reactive power optimization control system
This paper wind farm reactive voltage optimization goal is: ensure the stability of the pcc voltage and meet the constraint conditions, control the wind farm reactive power output to achieve the stability of the machine voltage and the reduction in the network loss.
The control steps Wind farm reactive power and voltage control steps as follows: 1) Get real-time operational data , the control instruction of PCC voltage and wind turbine terminal voltage from the wind farm data monitoring platform; 2) Determine whether control dead zone, if the control dead zone, then control over; If not, then in step 3; 3) Calculate the reactive power source output range, establish the reactive voltage control mathematical model; 4)Set the parameters such as particle number, number of iterations in the algorithm, random initialization of the velocity and position of each particle. 5) Calculate the fitness of each particle, get the particle individual optimal value pbest and global optimal value gbest;6) Update each particle's position and velocity, weights and learning factor; 7) If reach the pre-set number of iterations, then stop the search, or turn to step 5;8) Determine whether the data is reasonable, if reasonable then control execution, if not then alarm.
The control steps Wind farm reactive power and voltage control steps as follows: 1) Get real-time operational data , the control instruction of PCC voltage and wind turbine terminal voltage from the wind farm data monitoring platform; 2) Determine whether control dead zone, if the control dead zone, then control over; If not, then in step 3; 3) Calculate the reactive power source output range, establish the reactive voltage control mathematical model; 4)Set the parameters such as particle number, number of iterations in the algorithm, random initialization of the velocity and position of each particle. 5) Calculate the fitness of each particle, get the particle individual optimal value pbest and global optimal value gbest;6) Update each particle's position and velocity, weights and learning factor; 7) If reach the pre-set number of iterations, then stop the search, or turn to step 5;8) Determine whether the data is reasonable, if reasonable then control execution, if not then alarm.
Online since: November 2016
Authors: Shilpa Rajeev, M.V. Varkey, Deepak John Peter
The structural efficiency of the CFST arch bridge system is due to reduction in bending moments by the use of arches and ties, confinement effect provided by the steel tube to concrete, effect of post tensioning in reducing tensile stresses in ties, composite action which improves the flexural capacity of the ties. [5] This form of bridge system improves the aesthetic quality of the bridge and seismic behavior is desirable.
The ground acceleration data of Sikkim earthquake, 2012 of magnitude 6.9 was applied to the structure.
Fig 4 shows the tri-directional ground acceleration data applied.
Fig 3: Model of the CFST Bridge Fig 4: Ground acceleration data Modal analysis Modal analysis for the structure was carried out to obtain the mode shapes and natural frequencies of the structure which are given in Table 2.
The ground acceleration data of Sikkim earthquake, 2012 of magnitude 6.9 was applied to the structure.
Fig 4 shows the tri-directional ground acceleration data applied.
Fig 3: Model of the CFST Bridge Fig 4: Ground acceleration data Modal analysis Modal analysis for the structure was carried out to obtain the mode shapes and natural frequencies of the structure which are given in Table 2.