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Online since: May 2011
Authors: Yu Bin Liu, Lei Xu
The effect of section dimensions on temperature reduction is significcant both for the section center and for the steel out surface.
The reduction in temperature due to the increase of dimensions becomes less significant when C exceeds a certain range (about C=2000mm).
It can be found that the influence of steel ratico on steel tube and section core temperature reduction is less.
The theoretical predictions in this paper are in good agreement with the experimental data
The increase in section dimension results in a temperature reduction within the section, whereas the reduction in temperature becomes less significant when C exceeds a certain range.
The reduction in temperature due to the increase of dimensions becomes less significant when C exceeds a certain range (about C=2000mm).
It can be found that the influence of steel ratico on steel tube and section core temperature reduction is less.
The theoretical predictions in this paper are in good agreement with the experimental data
The increase in section dimension results in a temperature reduction within the section, whereas the reduction in temperature becomes less significant when C exceeds a certain range.
Online since: November 2011
Authors: Narongrit Sombatsompop, Chana Prapruddivongs
However, recent literature surveys has indicated that the information and experimental data, regarding mechanical and thermal properties of wood/PLA composites are still rare, likely due to difficulties in processing which are related to fiber-polymer incompatibilities and low melt strength of PLA [1-2].
The percent reduction in term of of bacteria colony-forming-units (CFU) was calculated using Eq. 1: (1) where: R is the decreasing of bacteria (%), A is the average amount of bacterial colonies from composites without triclosan for a given contact time (CFU/ml), and B is the average amount of bacterial colonies from composites with triclosan for a given contact time (CFU/ml) Characterizations Differential scanning calorimetry (DSC; DSC822, Mettler-Toledo, USA) was used to observe the physical and thermal properties of PLA, triclosan, wood flour and PLA composites with triclosan and wood.
Percent bacteria reductions for PLA and wood flour/PLA composites with triclosan loadings of 0.5–1.5%wt for different contact times Materials Contact time (min.)
Percent bacteria reduction (%) 0.5% Tricolsan 1.0% Tricolsan 1.5% Tricolsan PLA 60 14.86 9.46 17.57 120 53.16 63.16 65.26 180 62.95 63.86 74.11 240 74.92 78.81 83.40 5%WF/PLA 60 10.77 24.62 32.31 120 49.58 77.73 87.39 180 45.74 81.91 83.69 240 54.95 88.16 91.65 10%WF/PLA 60 21.67 48.33 40.00 120 63.27 74.83 86.39 180 64.20 82.72 96.71 240 63.68 88.05 96.78 Antibacterial performances The percent bacteria reductions of PLA and wood/PLA composites are given in Table 1.
It was observed that, for all tested specimens and tested conditions, when triclosan contents and contact time were increased the percent bacteria reductions also increased.
The percent reduction in term of of bacteria colony-forming-units (CFU) was calculated using Eq. 1: (1) where: R is the decreasing of bacteria (%), A is the average amount of bacterial colonies from composites without triclosan for a given contact time (CFU/ml), and B is the average amount of bacterial colonies from composites with triclosan for a given contact time (CFU/ml) Characterizations Differential scanning calorimetry (DSC; DSC822, Mettler-Toledo, USA) was used to observe the physical and thermal properties of PLA, triclosan, wood flour and PLA composites with triclosan and wood.
Percent bacteria reductions for PLA and wood flour/PLA composites with triclosan loadings of 0.5–1.5%wt for different contact times Materials Contact time (min.)
Percent bacteria reduction (%) 0.5% Tricolsan 1.0% Tricolsan 1.5% Tricolsan PLA 60 14.86 9.46 17.57 120 53.16 63.16 65.26 180 62.95 63.86 74.11 240 74.92 78.81 83.40 5%WF/PLA 60 10.77 24.62 32.31 120 49.58 77.73 87.39 180 45.74 81.91 83.69 240 54.95 88.16 91.65 10%WF/PLA 60 21.67 48.33 40.00 120 63.27 74.83 86.39 180 64.20 82.72 96.71 240 63.68 88.05 96.78 Antibacterial performances The percent bacteria reductions of PLA and wood/PLA composites are given in Table 1.
It was observed that, for all tested specimens and tested conditions, when triclosan contents and contact time were increased the percent bacteria reductions also increased.
Online since: August 2021
Authors: Jaroslav Halvonik, Ľudmila Kormosova
An effect of the openings placed close to a column on the punching capacity was taken into account by the reduction of the control perimeter length according to Fig.2 and concentration of the shear stresses at the shorter edges of a column by the further reduction that is shown in Fig.2.
The results obtained vary with different consideration of the reduction of the control perimeter lengths in accordance with Fig.2.
The first evaluation is with reduction of control perimeter length due to elongated column, where cmax > 3d and the second is without this reduction.
The same reduction of control perimeter length due to the presence of the openings (Fig.2) was considered in both cases.
Zsutty, Beam shear strength prediction by analysis of existing data.
The results obtained vary with different consideration of the reduction of the control perimeter lengths in accordance with Fig.2.
The first evaluation is with reduction of control perimeter length due to elongated column, where cmax > 3d and the second is without this reduction.
The same reduction of control perimeter length due to the presence of the openings (Fig.2) was considered in both cases.
Zsutty, Beam shear strength prediction by analysis of existing data.
Online since: June 2012
Authors: Li Han, You Jun Zhang, Chen Chang Zhang, Jie Wang
The reduction of volume is beneficial to improve PCP system performance.
The parameters of original design proposal by conventional method are: = 22, = 29, = 80, b = 52mm, m = 5mm, q = 3, = Y N Start Input the primary datum Calculate objective functions of vertexes Sequence vertexes according to objective functions Satisfy the condition of convergence?
According to the model and the solution procedure of reliability optimum design above, the result of the instance is therefore given by = [22.554 362 500, 53.258 470 380, 4.346 102 556] = 2 502 836.214 208 071 39 There are 8(i.e.) rounding points after rounding up the optimizing solution of real type data above and 6 rounding points of them are in the feasible zone.
The reduction of volume is beneficial to improve PCP system performance.
The parameters of original design proposal by conventional method are: = 22, = 29, = 80, b = 52mm, m = 5mm, q = 3, = Y N Start Input the primary datum Calculate objective functions of vertexes Sequence vertexes according to objective functions Satisfy the condition of convergence?
According to the model and the solution procedure of reliability optimum design above, the result of the instance is therefore given by = [22.554 362 500, 53.258 470 380, 4.346 102 556] = 2 502 836.214 208 071 39 There are 8(i.e.) rounding points after rounding up the optimizing solution of real type data above and 6 rounding points of them are in the feasible zone.
The reduction of volume is beneficial to improve PCP system performance.
Online since: May 2009
Authors: Annamaria Vilinska, K. Hanumantha Rao, I.V. Chernyshova
The manner, in which bacteria affect the surface reactivity and the mechanism of bacteria
adsorption, is still unknown and accumulation of the primary data in this area is only starting.
In fact, mining waste is one of the largest waste streams and is responsible for 18% of overall waste generation (OSCE data 1998).
Redox cycle of sulfur - oxidations are shown in yellow (grey) arrows and reductions in red (dark).
Either case, the mechanisms of biotic degradation, being based on indirect data, remains entirely speculative.
Progress in this area is hampered by a deficit of direct, not to mention in situ, spectroscopic molecular/atomic-level data about the mineral-bacterium interfaces.
In fact, mining waste is one of the largest waste streams and is responsible for 18% of overall waste generation (OSCE data 1998).
Redox cycle of sulfur - oxidations are shown in yellow (grey) arrows and reductions in red (dark).
Either case, the mechanisms of biotic degradation, being based on indirect data, remains entirely speculative.
Progress in this area is hampered by a deficit of direct, not to mention in situ, spectroscopic molecular/atomic-level data about the mineral-bacterium interfaces.
Online since: August 2013
Authors: Rong Wei Shen, Jiong Gang Han, Ze Gang He, Xiao Hong Tai
Design of the data collecting system
The data collecting system collects and processes the signals from sensors assembled on the bench.
Fig.4 Composition of data collecting system C.
Measure and control software can conveniently save data and select the saving path.
Data can be display in a way which tester expects.
The history data can be reviewed to facilitate data analysis.
Fig.4 Composition of data collecting system C.
Measure and control software can conveniently save data and select the saving path.
Data can be display in a way which tester expects.
The history data can be reviewed to facilitate data analysis.
Online since: August 2016
Authors: Vladimir V. Vyukhin, Viktor V. Konashkov, Vladimir S. Tsepelev
Existence of density data significantly increased the accuracy of processing of experimental data of viscosity.
In addition for industrial production, it is often not rather simple to obtain reference data about properties of an alloy.
For this reason, when developing new technologies it is necessary to use experimental data.
The automatic system of data collection allows to do one measurement in one minute.
The points taken at reduction of temperatures are painted over by the black.
In addition for industrial production, it is often not rather simple to obtain reference data about properties of an alloy.
For this reason, when developing new technologies it is necessary to use experimental data.
The automatic system of data collection allows to do one measurement in one minute.
The points taken at reduction of temperatures are painted over by the black.
Online since: December 2013
Authors: Hong Yu Wang, Dan Chen, Bin Lv
Nitrate reduction by an isolated strain of Fe(II)-dependent autotrophic denitrification bacteria
Hongyu Wang1, a, Dan Chen1,b and Bin Lv2,c
1School of Civil Engineering, Wuhan University, Wuhan 430072, China
2 School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
awhydream2000@163.com, bchendanqcf@163.com, c48853456@qq.com
Keywords: Fe(II)-dependent autotrophic denitrification; W1; denitrification efficiency; nitrate.
Available technical data, experience, and economics indicated that biological denitrification was more acceptable for nitrate removal than reverse osmosis and ion exchange (Archna et al. 2012).
Shelobolina et al. (2003) considered that some bacteria used to be recognized as ferric iron-reduction heterotrophic bacteria were capable of nitrate-dependent ferrous-iron oxidation as well.
Just because the superfluous nitrogen source could not be used for W1, the reduction rate of nitrate was decreased.
Available technical data, experience, and economics indicated that biological denitrification was more acceptable for nitrate removal than reverse osmosis and ion exchange (Archna et al. 2012).
Shelobolina et al. (2003) considered that some bacteria used to be recognized as ferric iron-reduction heterotrophic bacteria were capable of nitrate-dependent ferrous-iron oxidation as well.
Just because the superfluous nitrogen source could not be used for W1, the reduction rate of nitrate was decreased.
Online since: June 2012
Authors: Xiang Qian Shen, Hong Bo Liu, Qing Rong Liang, Xin Chun Yang
For the 40 mm thick sample, the maximum absorption coefficient, noise absorption coefficient, noise reduction coefficient and half-width of the absorption peak are 0.99, 0.59, 0.64 and 5828 Hz, respectively.
The measurement system was composed of the SW422 (Ø100mm) and SW477 (Ø30mm) impendence tubes with a loudspeaker, two MPA416 microphones, CA111 sound calibrator, YAMAHA XP2500 power amplifier, MC3642 data acquisition analyzer and VA-Lab4 software.
According to the reflection (111) data, the average crystalline size can be estimated by the Scherrer formula.
The comparison of sound absorption parameters of peak absorption coefficient (PAC), noise absorption coefficient (NAC), noise reduction coefficient (NRC) and half-width of the resonant peak (PHW) are presented in Table 1 for the FCN alloy microfibers samples with thickness of 15 mm and 40 mm prepared in this work, the lotus-type porous copper with thickness of 10 mm reported by Xie et al [8] and open celled aluminum foam with thickness of 40 mm reported by Wang et al [7].
The measurement system was composed of the SW422 (Ø100mm) and SW477 (Ø30mm) impendence tubes with a loudspeaker, two MPA416 microphones, CA111 sound calibrator, YAMAHA XP2500 power amplifier, MC3642 data acquisition analyzer and VA-Lab4 software.
According to the reflection (111) data, the average crystalline size can be estimated by the Scherrer formula.
The comparison of sound absorption parameters of peak absorption coefficient (PAC), noise absorption coefficient (NAC), noise reduction coefficient (NRC) and half-width of the resonant peak (PHW) are presented in Table 1 for the FCN alloy microfibers samples with thickness of 15 mm and 40 mm prepared in this work, the lotus-type porous copper with thickness of 10 mm reported by Xie et al [8] and open celled aluminum foam with thickness of 40 mm reported by Wang et al [7].
Online since: May 2012
Authors: Xin Hua Wu, Ling Zhi Sun
The study of building industrialization development mode based on carbon emissions Trading
Lingzhi Sun1 Xinhua Wu2
(1,2 Shan dong university of science and technology, China)
(1sdkdslz@163.com,2 xinhuawu@126.com)
Key words: building industrialization, external economy, carbon emission trading, development mode
Abstract: Building industrialization has great significance to change the traditional mode of construction production,helps to achieve the goal of energy saving and emissions reduction, and promotes the sustainable development.The paper analyzes the low carbon characteristics of building industrialization products and the market failure caused by external economy, introduces the market mechanism of carbon emissions trading,which makes supply and demand of building industrialization products to approach or achieve the optimal state of Pareto.
But the traditional mode of construction production is hard to achieve the target of carbon reduction, in comparison,the building industrialization production has the effect of significant reduction and it has accounted for a considerable share of the market in developed countries,such as,the United States for the 31%,Northern Europe countries are more than 60% [3].At present,China has the conditions of developing building industrialization,but just be in the ascendant,the main reason is that our country is lack of corresponding policies to promote and guide.
Kyoto Protocol makes the market mechanism as the new path to realize the reduction of the greenhouse gas emissions, carbon emissions trading is essential marketization means to control carbon emissions.China has adopted the “Twelfth Five-Year Plan”scheme of greenhouse gas emission control,and proposes to establish the market of carbon emissions trading [1],and the experts point out that our country would like to realize compulsory carbon emissions trading in future.Therefore,to research the development mode of building industrialization has an important sense for building energy saving and emissions reduction, combined with the characteristics of building industrialization, based on the perspective of carbon emissions trading.
Carbon emissions trading system has been proved to be the most effective emissions reduction system, and be attentioned more and more by international, which has become a worldwide market mechanism of reducing carbon dioxide emissions [4].
Assessment and monitoring institution for the life cycle carbon emissions is an independent third party, which is in charge of carbon emissions assessment during the decision-making period,energy consumption monitoring during the construction and operating process,dynamic monitoring of building energy consumption and carbon emissions, acquisition of monitoring data for carbon emissions.If the actual carbon emissions is less than (greater than ) the initial distribution, we can sell( purchase) it in the market,so we can promote the formation of carbon emissions trading market timely and effectively,the remaining one can obtain corresponding economic benefit compensation.
But the traditional mode of construction production is hard to achieve the target of carbon reduction, in comparison,the building industrialization production has the effect of significant reduction and it has accounted for a considerable share of the market in developed countries,such as,the United States for the 31%,Northern Europe countries are more than 60% [3].At present,China has the conditions of developing building industrialization,but just be in the ascendant,the main reason is that our country is lack of corresponding policies to promote and guide.
Kyoto Protocol makes the market mechanism as the new path to realize the reduction of the greenhouse gas emissions, carbon emissions trading is essential marketization means to control carbon emissions.China has adopted the “Twelfth Five-Year Plan”scheme of greenhouse gas emission control,and proposes to establish the market of carbon emissions trading [1],and the experts point out that our country would like to realize compulsory carbon emissions trading in future.Therefore,to research the development mode of building industrialization has an important sense for building energy saving and emissions reduction, combined with the characteristics of building industrialization, based on the perspective of carbon emissions trading.
Carbon emissions trading system has been proved to be the most effective emissions reduction system, and be attentioned more and more by international, which has become a worldwide market mechanism of reducing carbon dioxide emissions [4].
Assessment and monitoring institution for the life cycle carbon emissions is an independent third party, which is in charge of carbon emissions assessment during the decision-making period,energy consumption monitoring during the construction and operating process,dynamic monitoring of building energy consumption and carbon emissions, acquisition of monitoring data for carbon emissions.If the actual carbon emissions is less than (greater than ) the initial distribution, we can sell( purchase) it in the market,so we can promote the formation of carbon emissions trading market timely and effectively,the remaining one can obtain corresponding economic benefit compensation.