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Online since: June 2014
Authors: Yan Ming Yang, Yun Long Li, Jian Qiu Zheng, Wei Zheng
According to the actual investigation and studying on the related data, the effluent quality of SOESTP project should meet the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB18918-2002).
In CWs, SS reduction in wetlands is supported by physical processes such as filtration, sedimentation and microbial assimilation within the wetland substrate media[5].
The reduction of nitrogen in SOESTP is quite satisfactory.
Additionally, there are also data shows that actinomycetes and protozoa placed in CWs play a central role in the reduction of colibacillus [7].
Conclusions Based on the results from the available data in the project, SOESTP offers higher effluent quality containing ozone through physical, chemical and biological mechanisms.
Online since: November 2012
Authors: Qiang Fu, Ning Deng, Bing Feng Lv, Xia Cao, Ling Zhi Jin
It is suggested that the crack width of unbonded partially prestressed RPC beams calculated in accordance with the specification for unbounded partially prestressed concrete structure should multiply the reduction factor of 0.7.
Table 2 L2 crack spacing’s measured and calculated results under normal loads No. rte deq (mm) c (mm) ccr,m (mm) tcr,m (mm) ccr,m/ tcr,m L2-1 0.0174 14.28 20 103.6 83 6.35 L2-2 74 6.88 Comparison of the data can be seen from table, the calculated average crack spacing value of L2 beam according to specification is larger than the measured value.
Bring Measured data in this experiment into the above formula can be obtained the calculated value of crack width are shown in Table 3.
Experiment phenomena and the experimental data indicate that the measured value of crack spacing is less than the values calculated by the formula in " code for design of concrete structures" ​and suggest that modify the calculated values.
The experiment results show that the reduction coefficient is 0.7.
Online since: April 2009
Authors: Marta Martins, Celeste M.C. Pereira
The cone data reported here are obtained by burning samples in the horizontal position with an exposed surface of 100×100 mm2 and are the average of two or three replicated samples.
The peak heat release rate is reproducible to within ±10% and the time to ignition data is reproducible to within ±15% [6].
This reduction in the degradation temperature was not expected because Mg(OH)2 is thermally stable up to 330-340ºC [7], and will be explored by further experiments.
Comparing all the nanocomposites with pure epoxy resin, it is possible to see that there are important reductions in HRR for the whole amounts of nano-Mg(OH)2 used.
The reductions in PHRR were about 33% for 10% nano-Mg(OH)2, 22% for 5% nano-Mg(OH)2 and 23% for 1% nano-Mg(OH)2.
Online since: March 2020
Authors: D.M. Sharapova, E.I. Pryakhin
The gradation is made from the condition of the reduction of metal viscosity in the overheating zone, determined by the magnitude of the impact of Sharpy samples at the temperature of 40 °C below zero.
The concept of pipe steel development adopted in Russia provides for the reduction in carbon content; increasing the purity of the metal by harmful impurities (S≤0.001 %, P≤0.010); rational micro-alloying; thermo-mechanical rolling [6].
Minimum values of the impact of a metal of coarse grain area of HAZ (lower envelopes) depending on the number of reheats and linear energy The data obtained show that the studied steels of K70 (X90) strength class must have appropriate limitations when applying repair technologies based on heating by an electric arc.
The obtained test data allowed the gradation of the investigated semi-finished products according to their repair ability, i.e. by the number of permissible repeated local heating of the material of parts during repair (Table 2).
In addition to the reduction of heat input, one more technological technique should be pointed out, which allows avoiding overlapping of superheat sections during repeated heating, which is quite simple in its design to avoid overlapping of superheat sections on each other.
Online since: November 2012
Authors: Anji Yu, Dong Dong Yang, Hua Feng Cao, Xiao Pei Yang, Jie Liu
Comparison with the results obtained by the strength reduction FEM proposed by AcademicianYingrenZhengshows that the proposed method is more simple and reasonable to determine slope stability or not.
During modeling, under the premise of not affecting the calculation results, simplifying the slope lineappropriately.At the same time, because of the relative lack of drilling data of the slope, when modeling considered that the most dangerous situation, namely thought the marlstone dissection links up continuously in the analysis section plane.
The stabilitycoefficient analysis using finite element method The stabilitycoefficient of basic operating condition.The comparison of using gravity load ratio method to calculate the slope stability coefficient and the results obtained by thestrength reduction FEM is showing in Table 2: Table2The contrast table of stability coefficient Calculation times Safety coefficient Gravity Loading Proportion Method 1 1.21 Strength reduction method 7 1.1963 Contrasting two kinds of methods can explain the science, simplicity and rationality of the Gravity Loading Proportion Method Evaluation of slope stability.According to the slope geological survey data and the results of slope safety coefficient calculation, the following conclusions can be drawn: 1 - 1 profile basically stablein natural condition, but the safety coefficient do not meet the requirements of specification.
Conclusion Given the steps and implementation process of the ADINA software platform of the Gravity Loading Proportion Method, this paper comparedwith the stability safety factor of the strength reduction FEM, finally drawnthe conclusion of whether the slope stabilityor not.
Online since: April 2015
Authors: Jie Xu, Sheng Li Li, Xing Dong Peng, Mei Ling Wang
The results showed that when carbon content was 0.04%, adding aluminum content or reducing silicon content and manganese content, reducing the reduction in previous rolling passes and increasing the reduction of the finishing pass at high temperature was beneficial for reducing the yield strength and tensile strength of the hot rolled strips.
C Mn Si S P Al A1 and A2 0.046 0.15 0.04 0.0043 0.0088 0.021 B1 and B2 0.041 0.16 0.05 0.0041 0.0083 0 In Fig. 1, the results showed that the main microstructure of the samples included ferrite and very little pearlite scattering along the grain boundary with the mean grain size of (A1:28um, B1:27.13um; A2:14.15um, B2:11.55um), and it can be deduced that increasing the reduction of the finishing rolling pass was beneficial, especially in the previous, increasing rolling passes and decreasing the reduction of each pass.
Three samples were tested at each level and fatigue life was calculated after data processing.
Fig. 8 Pictures of support parts after stamping Conclusions When carbon content was 0.04%, it was beneficial for reducing the yield strength and tensile strength by adding aluminum or reducing silicon and manganese, reducing the reduction in the previous rolling passes, and increasing the reduction of the finishing pass at high temperature, which was used to reduce the yield and tensile strength.
Online since: July 2015
Authors: A. Erman Tekkaya, Chrstioph Becker
It already has been shown that a reduction of the bending force takes place [4].
This can be done with a constant wall thickness reduction or with a variable reduction along the tube axis
Therefore the ratio of initial and final wall thickness can be written as (3) The analytical approach was proven by experimental data.
The revolution speed U as well as the diameter reduction x are kept constant.
Figure 4: Wall thickness depending on bending radius [10] Figure 4 also shows that the analytical assumptions (ana.) concerning the strains (Eqs. (1)-(3)) are proven by the experimental data (exp.).
Online since: August 2013
Authors: Kang Guk Lee, Won Hwa Hong, Jong Cheon Park
This research, therefore, aims to examine the effectiveness of related policies in reducing greenhouse gas emission in the country’s home heating sector through scenario analysis on the greenhouse gas reduction in home heating sector.
The data required most for the estimation, therefore, are: (1) present state and future projection of home energy demand per energy source; (2) greenhouse gas emission coefficient of each energy source per usage.
It was confirmed, however, that KEPCO does not keep data on the share of each energy source employed to generate electricity for home use.
For greenhouse gas emission coefficient per energy source required to total estimate greenhouse gas emission, data of the Ministry of Environment and National Institute of Environmental Research was employed (Greenhouse Gas Emission, 2009).
Greenhouse Gas Emission Conclusions This study is aimed at analyzing the effect of reducing greenhouse gas emission by using a scenario in greenhouse gas reduction in home heating sector, with its conclusion as shown below: 1.
Online since: February 2011
Authors: Qing Wei Ding, Tian Wei Qian
Detect the residual quantity of Re (Ⅶ) at the first, third, sixth, and seventh day, all the data are listed in tab3.
From the data above, a relationship between the reduction of ReO4- and the initial content can be obtained as followed fig5.
From the data above, another relationship between reaction time and reduction of ReO4- iron can be obtained as fig6: Mark C1(μg) as the initial content of ReO4-, C1(μg) as the residual quantity after 24h reaction time, C2(μg) as the residual quantity after 3×24h reaction time, C3(μg) as the residual quantity after 6×24h reaction time, C4(μg) as the residual quantity after 7×24h reaction time.
Table 4 The results of column text initial content of ReO4-/μg 30 60 90 Without ZVI With ZVI Without ZVI With ZVI Without ZVI With ZVI leaked solution/ml 84.7 78.6 91.2 110.6 118.7 120.2 absorbance/A ∞ 0.807 ∞ 0.943 ∞ 1.092 Residual content/μg 0.35883 0.59 0.74253 Removal rate/% 98.81 99.01 99.17 From the data listed in tab, the final mean removal rate of ReO4- is 99%, as same as the result from batch text, which shows the sound removal effect of ReO4- is very stable.
What’s more, the reduction in pillar text is more efficient within less time.
Online since: September 2011
Authors: Jian Wei Huang
B=constant determined using the time shift of two known curves based on accelerated ageing test, as follows: by simply taking the ratio of the time values required for the specified strength loss from data at two different temperatures, TSFT1−T2 can be obtained, then B value can be solved, after which any TSF for temperature T other than T1 and T2 can be obtained by substituting the temperature T value into the equation with a reference temperature T1 (or T2).
Two sets of aging data on the tensile strength retention of GFRP bars were reported at 20°C and 60 °C, respectively.
For example, for April, it should take 0.27 month at 20°C to give the same reduction under 1 month at 5.7 °C.
Per CSA-S806-02 [11], environmental reduction factor is specified as equal to 0.5, indicating the code gives safe reduction factor for the GFRP design in Ottawa, Ontario Province, Canada.
Current reduction factor in the code shall be safe for majority of concrete applications.
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