Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: March 2008
Authors: Du Yi Ye, Jinyang Zheng
The elongation to failure and reduction
in area are 22% and 28%, respectively.
The values of K' and n' determined by the log-log linear regression analysis of the test data obtained by both the CST and the IST method in the individual region of the plastic strain, i.e. %2.0≤pε and %2.0≥pε , are listed in Table 4.
This two-slope C-M behavior indicates that the actual fatigue life of the alloy tested at low strain amplitudes ( %2.0≤apε ) is less than the life anticipated from extrapolation of the data points of high strain amplitudes ( %2.0≥apε ).
The strain fatigue data are analyzed in the individual region of plastic amplitudes, i.e. %2.0≤apε and %2.0≥apε , using a least squares analysis according to Eq.(2).
The two-slope of the C-M plot indicates that for GH4145/SQ alloy prediction of fatigue life, at low strain amplitudes, based on extrapolation of high strain amplitude data could be quite erroneous and might results in overestimation of fatigue life.
The values of K' and n' determined by the log-log linear regression analysis of the test data obtained by both the CST and the IST method in the individual region of the plastic strain, i.e. %2.0≤pε and %2.0≥pε , are listed in Table 4.
This two-slope C-M behavior indicates that the actual fatigue life of the alloy tested at low strain amplitudes ( %2.0≤apε ) is less than the life anticipated from extrapolation of the data points of high strain amplitudes ( %2.0≥apε ).
The strain fatigue data are analyzed in the individual region of plastic amplitudes, i.e. %2.0≤apε and %2.0≥apε , using a least squares analysis according to Eq.(2).
The two-slope of the C-M plot indicates that for GH4145/SQ alloy prediction of fatigue life, at low strain amplitudes, based on extrapolation of high strain amplitude data could be quite erroneous and might results in overestimation of fatigue life.
Online since: August 2019
Authors: Somkamon Manchun, Sitthiphong Soradech, Khaunnapa Panapong, Pokchut Kusolkumbot, Surada Soonthornsatitwong, Krongkarn Kingkeaw
The results showed that ASTA (1 mg/mL) had no toxic effects on melanoma cells and it exhibited high potential for reduction of tyrosinase and melanin content, representing 80.57% and 75.86%, respectively.
One-way ANOVA was used for the analysis of the data to determine the extent of any differences between treatments.
ASTA showed the highest reduction in tyrosinase and melanin content, which accounted for 80.57 % and 75.86 %, respectively as shown in Table 2.
The ASTA loading MEs affected the droplet size reductions of both formulations, with a decline for ME1 from 156.70 nm to 84.92 nm, and from 129.37 nm to 120.20 nm for ME2.
One-way ANOVA was used for the analysis of the data to determine the extent of any differences between treatments.
ASTA showed the highest reduction in tyrosinase and melanin content, which accounted for 80.57 % and 75.86 %, respectively as shown in Table 2.
The ASTA loading MEs affected the droplet size reductions of both formulations, with a decline for ME1 from 156.70 nm to 84.92 nm, and from 129.37 nm to 120.20 nm for ME2.
Online since: February 2011
Authors: Sahari B. Barkawi, J. Mai Nursherida, A.A. Nuraini
The CAD model of the bumper was first created using CATIA software and the data was imported and the surfaces were created and meshed using LS-DYNA V971 software.
Material E11 (GPa) E22 (GPa) E33 (GPa) G12 (GPa) G13 (GPa) G23 (GPa) υ12 υ13 υ23 ρ (kg/m3) E-glass/epoxy 44.6 13.4 13.4 4.4 4.4 5.0 0.317 0.317 0.342 2040 Carbon/epoxy 150.7 13.3 13.3 4.9 4.9 4.8 0.287 0.287 0.390 1554 Table 4 Result Comparison No Bumper Beam Material Fiber Configuration Thickness of each layer(mm) Total Thickness (mm) Internal Energy (kJ) Specific Energy Absorption (kJ/kg) Mass (kg) Mass reduction compared with steel (%) 1 Steel Isotropic N/A 1.2 3.76 1.405 2.676 0 2 AA5182 Isotropic N/A 1.6 3.38 2.798 1.208 54.86 3 AA5182 Isotropic N/A 1.8 3.84 2.826 1.359 49.22 4 AA5182 Isotropic N/A 2.0 4.27 2.828 1.510 43.57 5 Glass A [0o/60o] S 0.5 2.0 4.01 3.481 1.152 56.95 6 Glass B [0o/30o/60o] S 0.4 2.1 4.26 3.521 1.210 54.78 7 Glass C [0o/30o/60o/90o] S 0.3 2.4 4.88 3.531 1.382 48.36 8 Carbon A [0o/60o] S 0.5 2.0 4.95 5.638 0.878 67.19 9 Carbon B [0o/30o/60o] S 0.4 2.1 5.03 5.461 0.921 65.58 10 Carbon C [0o/30o/60o/90o] S 0.3 2.4 5.68 5.394 1.053 60.65
In carbon epoxy bumper (Carbon A) the maximum weight reduction is 67.2% compared with steel bumper mass as shown in Table 4.
Carbon/epoxy composite bumper reduced the bumper mass with 67.2% of weight reduction and has highest value of SEA with 5.638 kJ/kg followed by e- glass composite bumper with 3.531 kJ/kg of SEA. 2.
Material E11 (GPa) E22 (GPa) E33 (GPa) G12 (GPa) G13 (GPa) G23 (GPa) υ12 υ13 υ23 ρ (kg/m3) E-glass/epoxy 44.6 13.4 13.4 4.4 4.4 5.0 0.317 0.317 0.342 2040 Carbon/epoxy 150.7 13.3 13.3 4.9 4.9 4.8 0.287 0.287 0.390 1554 Table 4 Result Comparison No Bumper Beam Material Fiber Configuration Thickness of each layer(mm) Total Thickness (mm) Internal Energy (kJ) Specific Energy Absorption (kJ/kg) Mass (kg) Mass reduction compared with steel (%) 1 Steel Isotropic N/A 1.2 3.76 1.405 2.676 0 2 AA5182 Isotropic N/A 1.6 3.38 2.798 1.208 54.86 3 AA5182 Isotropic N/A 1.8 3.84 2.826 1.359 49.22 4 AA5182 Isotropic N/A 2.0 4.27 2.828 1.510 43.57 5 Glass A [0o/60o] S 0.5 2.0 4.01 3.481 1.152 56.95 6 Glass B [0o/30o/60o] S 0.4 2.1 4.26 3.521 1.210 54.78 7 Glass C [0o/30o/60o/90o] S 0.3 2.4 4.88 3.531 1.382 48.36 8 Carbon A [0o/60o] S 0.5 2.0 4.95 5.638 0.878 67.19 9 Carbon B [0o/30o/60o] S 0.4 2.1 5.03 5.461 0.921 65.58 10 Carbon C [0o/30o/60o/90o] S 0.3 2.4 5.68 5.394 1.053 60.65
In carbon epoxy bumper (Carbon A) the maximum weight reduction is 67.2% compared with steel bumper mass as shown in Table 4.
Carbon/epoxy composite bumper reduced the bumper mass with 67.2% of weight reduction and has highest value of SEA with 5.638 kJ/kg followed by e- glass composite bumper with 3.531 kJ/kg of SEA. 2.
Online since: June 2011
Authors: Yan Hua Wang, Yuan Yuan Liu
The data was analyzed and the potential distribution maps were graphed using Surfer 8.0 software.
Under such thin electrolyte layer, the reduction reaction of oxygen is believed to play a vital role in the cathodic process.
Under such thin electrolyte layer, the cathodic process is mainly the reduction of O2.
Owing to the dense internal layer, the cathodic reduction reaction is difficult to proceed.
Under such thin electrolyte layer, the reduction reaction of oxygen is believed to play a vital role in the cathodic process.
Under such thin electrolyte layer, the cathodic process is mainly the reduction of O2.
Owing to the dense internal layer, the cathodic reduction reaction is difficult to proceed.
Online since: September 2014
Authors: Hai Nan Zhao, Qi Zhang, Chang Zheng Sun, Tong Feng Zhao
Compressive loading equipment is electric hydraulic pressure testing machine,as shown in Fig.2.The maximum load is 2000kN,and the pressure error is ±1kN.Install the specimens between the loading end of the pressure testing machine according to the standard method.The data collected automatically is longitudinal stress and compressive strength when the equipment works.
The relationship of stress and temperature.According to the analysis of Fig.5,in addition to PT-1:0,the reduction rate of stress at elevated temperature changes from high to low and it can be observed that it is in 400˚C as the cut-off point.For example,the reduction rate of stress of PT-1:5 changs as 43.72%-43.70%-43.70%-43.70%.The stress remains above 50% when temperature reaches 800˚C,in other words the compressive strength remains above 30MPa.The reduction rate of stress of PT-1:8 changs as 43.72%-43.70%-44.89%-49.75%.The stress remains above 50% when temperature reaches 800˚C,in other words the compressive strength remains up to 33.63MPa.Similarly,the compressive strength of every ratio specimen can remain up to 30MPa or even 40MPa at elevated temperature.
The relationship of stress and temperature.According to the analysis of Fig.5,in addition to PT-1:0,the reduction rate of stress at elevated temperature changes from high to low and it can be observed that it is in 400˚C as the cut-off point.For example,the reduction rate of stress of PT-1:5 changs as 43.72%-43.70%-43.70%-43.70%.The stress remains above 50% when temperature reaches 800˚C,in other words the compressive strength remains above 30MPa.The reduction rate of stress of PT-1:8 changs as 43.72%-43.70%-44.89%-49.75%.The stress remains above 50% when temperature reaches 800˚C,in other words the compressive strength remains up to 33.63MPa.Similarly,the compressive strength of every ratio specimen can remain up to 30MPa or even 40MPa at elevated temperature.
Advanced Methodology for Proton Exchange Membrane Fuel Cell Representation Validated by Measurements
Online since: August 2014
Authors: Antonios Kladas, Iason Avramiotis-Falireas
The chemical reactions which are taking place inside the fuel cell are the oxidation of Hydrogen and the reduction of Oxygen.
2H2 + O2à 2H2O + Heat
The change of concentration will cause a reduction of partial pressures of the gasses.
This will result in a reduction of fuel cell voltage, which is sharp when the drained current is high.
In order to investigate and validate the steady-state response of the proposed model, experimental data were obtained at 40, 45 and 50 0C.
The change of concentration will cause a reduction of partial pressures of the gasses.
This will result in a reduction of fuel cell voltage, which is sharp when the drained current is high.
In order to investigate and validate the steady-state response of the proposed model, experimental data were obtained at 40, 45 and 50 0C.
Online since: June 2014
Authors: Bao Le Deng, Hui Zhi Wang
In China, the government promulgated National Plan to Respond to Climate Change and promoted Comprehensive Working Plan of Energy Saving and Emission Reduction and Action Plan for Technology Development for Climate Change in to cope with climatic issues.
According to the data of Carbon Dioxide Information Analysis Center (CDIAC), carbon emission from Fossil-Fuel combustion is responsible for a considerable proportion of the total emission.
The impacts of climate change on transport are mainly about the transformation in transportation pattern and the reduction in transportation capacity, which influent the stability of the whole transport system.
Climate change indicator system of transportation planning SEA Objectives Criterions Indicators Evaluation on mitigation and adaptation capability of the transportation planning Driving Forces Annual growth rate of traffic volume Energy consumption per unit of GDP Average energy efficiency of vehicles % of reduction in greenbelt area per capita Pressure % of transport GHG emission in total GHG emission Annual change rate of GHG emission State Variation of average temperature per ten years Average concentration of GHG Height of roadbed above the sea level nearby Flood level nearby No. of extreme event per year Impact % of damaged road surface caused by CC per year % of traffic accidents caused by CC per year % of traffic deaths caused by CC per year % Financial loss in traffic caused by CC per year Change rate of species caused by CC per year Response % of vehicles using renewable energy or clean energy % of annual consumption of renewable and clean resources % of roads/railway
According to the data of Carbon Dioxide Information Analysis Center (CDIAC), carbon emission from Fossil-Fuel combustion is responsible for a considerable proportion of the total emission.
The impacts of climate change on transport are mainly about the transformation in transportation pattern and the reduction in transportation capacity, which influent the stability of the whole transport system.
Climate change indicator system of transportation planning SEA Objectives Criterions Indicators Evaluation on mitigation and adaptation capability of the transportation planning Driving Forces Annual growth rate of traffic volume Energy consumption per unit of GDP Average energy efficiency of vehicles % of reduction in greenbelt area per capita Pressure % of transport GHG emission in total GHG emission Annual change rate of GHG emission State Variation of average temperature per ten years Average concentration of GHG Height of roadbed above the sea level nearby Flood level nearby No. of extreme event per year Impact % of damaged road surface caused by CC per year % of traffic accidents caused by CC per year % of traffic deaths caused by CC per year % Financial loss in traffic caused by CC per year Change rate of species caused by CC per year Response % of vehicles using renewable energy or clean energy % of annual consumption of renewable and clean resources % of roads/railway
Online since: May 2013
Authors: Li Wang, Ji Ming Chen, Qi Sheng Zhu
Meanwhile, the global environment is being increasingly worsened, sharp reduction of non-renewable resources such as oil and coal occurs due to excessive exploitation.
According to the data released by the China Professional Committee of Building Energy Conservation, in the year of 2001, building energy consumption accounts for 27.6% of the total energy consumption nationwide [1], which is a huge proportion.
Holes should be made in advance when the building is being constructed to avoid damage to the construction layers in the rooftop, such as waterproof layer and thermal insulating layer. 2.5 The effect to energy saving and reduction of pollutant According to the area of heat collector, when the heat collecting rate is set as 0.62, the number of annual save of standard coal can be calculated.
Since the auxiliary heating device is propped by electricity, the annual reduction of CO2 , S02, and dust emission is 128t, 0.893t and 0.45t respectively, which is rather considerable.
According to the data released by the China Professional Committee of Building Energy Conservation, in the year of 2001, building energy consumption accounts for 27.6% of the total energy consumption nationwide [1], which is a huge proportion.
Holes should be made in advance when the building is being constructed to avoid damage to the construction layers in the rooftop, such as waterproof layer and thermal insulating layer. 2.5 The effect to energy saving and reduction of pollutant According to the area of heat collector, when the heat collecting rate is set as 0.62, the number of annual save of standard coal can be calculated.
Since the auxiliary heating device is propped by electricity, the annual reduction of CO2 , S02, and dust emission is 128t, 0.893t and 0.45t respectively, which is rather considerable.
Online since: October 2014
Authors: Chun Yan Sun, Wen Sheng Linghu
The result showed that the increase of the temperature can clearly improved the oxidation rate and mineralization degree of sawmill wastewater, achieving 60% COD reduction and 50% mineralization at 120 °C after 1 h with the stoichiometric H2O2 dose and 25 mg L−1 Fe3+.
Shen et al [6] used a combined zero-valent iron reduction and Fenton oxidation process for the pretreatment of 2, 4-dinitroanisole producing wastewater.
Wu et al [7] studied the influences of operating parameters on oxidation–reduction potential (ORP) and pretreatment efficacy in the pretreatment of printing and dyeing wastewater by Fenton process.
Table 3 presented the data of COD and color removal at different addition times of Fenton reagent.
Shen et al [6] used a combined zero-valent iron reduction and Fenton oxidation process for the pretreatment of 2, 4-dinitroanisole producing wastewater.
Wu et al [7] studied the influences of operating parameters on oxidation–reduction potential (ORP) and pretreatment efficacy in the pretreatment of printing and dyeing wastewater by Fenton process.
Table 3 presented the data of COD and color removal at different addition times of Fenton reagent.
Online since: January 2009
Authors: Michael B. Korzenski, Mark Robson, Kristin A. Fletcher, Ping Jiang, A. Upham, T. Haigh Jr., Thomas J.C. Hsieh
Reduction in test wafer spending enabled
by the RegenSi process.
0%
20%
40%
60%
80%
100%
Without RegenSi With RegenSi
New Wafer
Cost
Reclaim
Cost
Recycle
Cost
wafer costs are reduced by driving the source of test wafers away from expensive, new wafer
purchases towards reclaim and internal recycle (Figure 1).
Conversely, the wafer stripped using the RegenSi reclaim process showed a significant reduction in carbon and a concomitant increase in silicon and oxygen indicating the lack of ULK film.
TDMS analysis confirmed this conclusion (data not shown).
This allows multiple reclaim cycles which results in a significant cost savings due to the reduction in the purchase of new test wafers.
Conversely, the wafer stripped using the RegenSi reclaim process showed a significant reduction in carbon and a concomitant increase in silicon and oxygen indicating the lack of ULK film.
TDMS analysis confirmed this conclusion (data not shown).
This allows multiple reclaim cycles which results in a significant cost savings due to the reduction in the purchase of new test wafers.