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Online since: February 2018
Authors: Wei Wang, Yi Yi Chen, Xin Long Du, Yun Feng Zhang, Gong Ling Chu
This data was used to estimate the moment and axial force demands in the components under the plane section assumption and the elastic cross-sectional properties assumption.
Significant bracing yielding was typically observed near 1% drift, as indicated by the reduction in specimen stiffness.
The moment at the connection was estimated using the strain gauges data on the VBEs under the assumption that the inflection point of the VBE located exactly at the middle height point.
However, for the direction with no data of gap rotation (zero value in Fig. 9), the connection moment data is shown, which gives a curve almost parallel to the vertical axis.
Therefore the SCMPs are believed to provide a promising structural component that will be helpful to enhancing the seismic resilience of TOCBBTFs Acknowledgements Financial support for this study was provided by the State Key Laboratory of Disaster Reduction in Civil Engineering under Open Fund Award No.
Significant bracing yielding was typically observed near 1% drift, as indicated by the reduction in specimen stiffness.
The moment at the connection was estimated using the strain gauges data on the VBEs under the assumption that the inflection point of the VBE located exactly at the middle height point.
However, for the direction with no data of gap rotation (zero value in Fig. 9), the connection moment data is shown, which gives a curve almost parallel to the vertical axis.
Therefore the SCMPs are believed to provide a promising structural component that will be helpful to enhancing the seismic resilience of TOCBBTFs Acknowledgements Financial support for this study was provided by the State Key Laboratory of Disaster Reduction in Civil Engineering under Open Fund Award No.
Online since: March 2014
Authors: J. Payá, J.M. Monzó, M.V. Borrachero, Mauro M. Tashima, Jorge L. Akasaki, Vinicius N. Castaldelli, José Luiz P. Melges, Lourdes Soriano
It can contribute on the reduction of landfill areas and also diminish the carbon footprint caused by the industry.
Taking into account all the issues related to the reduction of carbon footprint of cement industry and the reduction of landfill areas required for wastes, there are many papers related to the use of sugar cane bagasse ash (SCBA) as supplementary cementitious materials in the production of blended Portland cement or concrete [9-10].
Flexural strength (Rf) value was calculated as a mean of three data and compressive strength (Rc) values were calculated as a mean of six data.
Three pH measurements were carried out, the final value being a mean of these three data.
The slight decrease of pH with curing time could be related to the increase in the amount of the combined OH-/H2O groups accordingly to the TG data.
Taking into account all the issues related to the reduction of carbon footprint of cement industry and the reduction of landfill areas required for wastes, there are many papers related to the use of sugar cane bagasse ash (SCBA) as supplementary cementitious materials in the production of blended Portland cement or concrete [9-10].
Flexural strength (Rf) value was calculated as a mean of three data and compressive strength (Rc) values were calculated as a mean of six data.
Three pH measurements were carried out, the final value being a mean of these three data.
The slight decrease of pH with curing time could be related to the increase in the amount of the combined OH-/H2O groups accordingly to the TG data.
Online since: July 2022
Authors: Antonio Piccininni, Gianfranco Palumbo, Maria Beatriz Silva
In light of this, the equipment used for the tube expansion tests was simulated by means of a FE model created using Abaqus and properly tuned using data coming from experimental tests carried out on AA6063-T6 tubular specimens.
Introduction The current normative framework in terms of harmful emissions is imposing a dramatic reduction of fuel consumption for the transportation sector in general [1].
Numerical simulations were run considering the tube fully in the condition as-purchased (T6), thus implementing the data reported in [10].
The constants of the constitutive equation were inversely calculated using an internal Abaqus subroutine that minimized the error with data coming from an experimental rubber compression test, carried out according to the reference standard [13].
a) b) Figure 5 The implemented material data regarding both the conditions of interest: a) flow curves, b) forming limit curves The implemented material data were then assigned to the correspondent tube’s regions by means of a field variable: in such a way, properties in the overaged condition could be always assigned to the regions that were supposed to be irradiated by the laser (green regions in Figure 6), whereas the remaining part could be modelled in the T6 state (grey regions in Figure 6).
Introduction The current normative framework in terms of harmful emissions is imposing a dramatic reduction of fuel consumption for the transportation sector in general [1].
Numerical simulations were run considering the tube fully in the condition as-purchased (T6), thus implementing the data reported in [10].
The constants of the constitutive equation were inversely calculated using an internal Abaqus subroutine that minimized the error with data coming from an experimental rubber compression test, carried out according to the reference standard [13].
a) b) Figure 5 The implemented material data regarding both the conditions of interest: a) flow curves, b) forming limit curves The implemented material data were then assigned to the correspondent tube’s regions by means of a field variable: in such a way, properties in the overaged condition could be always assigned to the regions that were supposed to be irradiated by the laser (green regions in Figure 6), whereas the remaining part could be modelled in the T6 state (grey regions in Figure 6).
Online since: January 2012
Authors: Xiao Bei Shi, Kai Wei, Bing Long Wang, Da Wei Huang
Fig. 2 Profile of Building D, E
Geological condition
According to the geological data, the soil in this zone can be divided into four layers from top to bottom, which are plain fill, completely-weathered granite, highly-weathered granite and weak-weathered granite in turn.
With the distance to the right tunnel increasing, the reduction of lateral pressure at the top of anchor rod is getting smaller and smaller.
In the middle of the second zone, the reduction reaches maximum, and then drops down.
In the second zone, the pressure decreases and the amount of the reduction decreases with the distance increasing from anchor rod to tunnel.
And the closer the distance to the midline of the right tunnel is, the bigger the reduction.
With the distance to the right tunnel increasing, the reduction of lateral pressure at the top of anchor rod is getting smaller and smaller.
In the middle of the second zone, the reduction reaches maximum, and then drops down.
In the second zone, the pressure decreases and the amount of the reduction decreases with the distance increasing from anchor rod to tunnel.
And the closer the distance to the midline of the right tunnel is, the bigger the reduction.
Online since: November 2011
Authors: Xin Jun Zhang, Qing Ling Li, Qing Fang Li, Jian Zhang, Guang Wen Chu
Lean solution condenser
regeneration
Solution make-up tank
absorbent
Desalting water
decarbonization gas
desulfurization gas
go to compress plant
blast and induced draft fan
Steam boiler
blast and induced draft fan
exchanger
Rich solution tank
Solution make-up tank
absorbent
rich pump
Lean pump
Lean/rich exchanger
condenser
absorption
regeneration
Lean solution tank liquor tank
Figure 3 Technology flow chart
Experimental results
At the condition of flue gas in a constant volume of 50m3/h, by changing the high gravity machine cycle speed and volume of solution, the optimal process parameters are determined, the experimental datum are shown in Table 3.
Table 3 Experimental datum Serial number High gravity machine cycle speed r/min solution circulating rate l/h capture rate % CO2 purity % 1 800 250 88 99.8 2 800 220 85 99.6 3 800 270 89 99.8 4 900 250 89 99.8 5 900 220 86 99.7 6 900 270 90 99.8 The experimental results show that high gravity machine’s rotate speed is higher than 800r/min, solution circulating rate is greater than or equal to 250 l / h, flue gas CO2 capture rate is greater than 85 percent, purity is more than 99.5%.
Table 4 Consumption Indicators Serial number name and specifications units amount 1 producing gas (that is regeneration gas) CO2≥99.5% (dry basis) t/ h 0.21 2 consumption circulating cooling water t/tCO2 ~100 Steam t/ tCO2 ≤1.9 Amine solvent Kg/tCO2 ≤1.75 Antioxidants Kg / tCO2 ≤0.025 Corrosion Kg / tCO2 ≤0.025 Power kw/ tCO2 ≤92 Desalination water Kg/ tCO2 ~46 Sodium carbonate Kg/ tCO2 ~0.04 Conclusion Oilfield carbon dioxide flooding technology represents the forefront of the EOR development direction, and is the most value domain for development of applications of carbon dioxide emission reduction.
By investigating the power plant, boiler flue gas carbon dioxide capture and purification technologies and carbon dioxide flooding technology applications, Sinopec minimized carbon dioxide emissions and achieved emissions reuse and environmental protection, improved energy utilization ratio, created enormous social and economic benefits, made due contribution to emission reduction for China and the world energy conservation.
Table 3 Experimental datum Serial number High gravity machine cycle speed r/min solution circulating rate l/h capture rate % CO2 purity % 1 800 250 88 99.8 2 800 220 85 99.6 3 800 270 89 99.8 4 900 250 89 99.8 5 900 220 86 99.7 6 900 270 90 99.8 The experimental results show that high gravity machine’s rotate speed is higher than 800r/min, solution circulating rate is greater than or equal to 250 l / h, flue gas CO2 capture rate is greater than 85 percent, purity is more than 99.5%.
Table 4 Consumption Indicators Serial number name and specifications units amount 1 producing gas (that is regeneration gas) CO2≥99.5% (dry basis) t/ h 0.21 2 consumption circulating cooling water t/tCO2 ~100 Steam t/ tCO2 ≤1.9 Amine solvent Kg/tCO2 ≤1.75 Antioxidants Kg / tCO2 ≤0.025 Corrosion Kg / tCO2 ≤0.025 Power kw/ tCO2 ≤92 Desalination water Kg/ tCO2 ~46 Sodium carbonate Kg/ tCO2 ~0.04 Conclusion Oilfield carbon dioxide flooding technology represents the forefront of the EOR development direction, and is the most value domain for development of applications of carbon dioxide emission reduction.
By investigating the power plant, boiler flue gas carbon dioxide capture and purification technologies and carbon dioxide flooding technology applications, Sinopec minimized carbon dioxide emissions and achieved emissions reuse and environmental protection, improved energy utilization ratio, created enormous social and economic benefits, made due contribution to emission reduction for China and the world energy conservation.
Online since: October 2011
Authors: De Min Zhang, Xue Hui Liang
· Persistent Event logging: no loss of data after power down
· Event Logging History: better analysis of errors and event dependences
· Fully automatic installation algorithm for both profiles: self-adjusting of profile relevant
Hardware construct design
The EDCS consists of one printed circuit board with integrated: input filter/ burst and surge protection, power supply, microprocessor system[3], serial (RS422) and discrete interface, 3-phase inverter power output, as shown in Fig.1.
Frequency inverter power plat design The inverter power plat consists of an ESD protection circuit, surge current reduction, an EMC reduction circuit , an uncontrolled full bridge rectifier, the DC Link (buffer capacitor), the 3 phase inverter and current/voltage sensors.
Frequency inverter power plat design The inverter power plat consists of an ESD protection circuit, surge current reduction, an EMC reduction circuit , an uncontrolled full bridge rectifier, the DC Link (buffer capacitor), the 3 phase inverter and current/voltage sensors.
Online since: August 2013
Authors: Jing Na Sun, Tao Xue, Zhi Yuan Guo
(1)
The flattened roller radius is given by[8]
, (2)
Whereis a pass reduction, and; is a coefficient of roller flatten, ; is the rolling force; , , , are the elastic modulus and the Poisson’s ratio of the strip and the roll respectively; is the strip elastic recovery at the deformation zone exit.
Calculation results and experimental verification To validate the calculation precision of the model, simulations were carried out using practical process data of 1725 mm mg alloy strip rolling mill.
Table 1 Rolling parameters and calculation results Examples 1 2 3 4 Strip material AZ31B AZ31B AZ31B AZ31B Initial thickness(mm) 11.5 9.5 6.0 12.0 Thickness reduction(%) 47.8 62.1 16.6 33 Strip width(mm) 700 750 1300 1600 Rolling speed/(m∙s−1) 0.5 0.5 1.5 1.5 Measured roll force(kN) 5050 5570 7060 17280 Calculated roll force(kN) 4835 5707 6779 16640 Error(%) 4.25 2.4 3.9 3.7 Conclusions An online calculation model of rolling force has also been developed with the finite difference method (FDM), The result indicates that the model has high precision and high speed.
Calculation results and experimental verification To validate the calculation precision of the model, simulations were carried out using practical process data of 1725 mm mg alloy strip rolling mill.
Table 1 Rolling parameters and calculation results Examples 1 2 3 4 Strip material AZ31B AZ31B AZ31B AZ31B Initial thickness(mm) 11.5 9.5 6.0 12.0 Thickness reduction(%) 47.8 62.1 16.6 33 Strip width(mm) 700 750 1300 1600 Rolling speed/(m∙s−1) 0.5 0.5 1.5 1.5 Measured roll force(kN) 5050 5570 7060 17280 Calculated roll force(kN) 4835 5707 6779 16640 Error(%) 4.25 2.4 3.9 3.7 Conclusions An online calculation model of rolling force has also been developed with the finite difference method (FDM), The result indicates that the model has high precision and high speed.
Online since: April 2012
Authors: Yong Liu, Jiong Sun, Jing Jun Lou
[2] Hodge P D, Manning R A.Force level data fusion for the underwater battle space[C].Proceeding of Underwater Defence Technology Conference and Exhibition 2001.Hamburg.2001:2A-2
Application of Chaos Method to Line Spectra Reduction[J].Journal of Sound and Vibration. 2005,286(3):645-652
[5] Guilin W, Yuanzhi L, Zhiyong Zhang.Line spectra reduction and vibration isolation via modified projective synchronization for acoustic stealth of submarines[J].Journal of Sound and Vibration,2009,324 :954–961
Application of Chaos Method to Line Spectra Reduction[J].Journal of Sound and Vibration. 2005,286(3):645-652
[5] Guilin W, Yuanzhi L, Zhiyong Zhang.Line spectra reduction and vibration isolation via modified projective synchronization for acoustic stealth of submarines[J].Journal of Sound and Vibration,2009,324 :954–961
Online since: October 2010
Authors: Il Kwon Oh, Tai Hong Cheng, Guang Ma, Yun De Shen
The dsPACE hardware was employed to data acquisition from coil and make switching signals to
the circuit.
In frequency domain there were almost 15dB reduction from uncontrolled beam structure.
In frequency domain self sensing method showed nearly a 15dB reduction in the vibration of the first mode of cantilever.
In frequency domain there were almost 15dB reduction from uncontrolled beam structure.
In frequency domain self sensing method showed nearly a 15dB reduction in the vibration of the first mode of cantilever.
Online since: September 2013
Authors: Guo Xian Ma, Hai Ying Zhang
Introduction
Incineration is witness a rapid increase for treatment of Municipal Solid Waste (MSW) due to weight reduction and energy reuse [1].
Such a pre-treatment is necessary for reduction of leaching toxicity of the hazardous fly ash.
In addition, they also elaborated the leaching data for selected heavy metals (Cr, Cu, Pb and Zn) obtained from sequential monolith leach tests with a pseudo-diffusional leaching model in order to identify the release mechanisms of such heavy metals and to predict the long-term leaching behavior of cement mortars.
Such a pre-treatment is necessary for reduction of leaching toxicity of the hazardous fly ash.
In addition, they also elaborated the leaching data for selected heavy metals (Cr, Cu, Pb and Zn) obtained from sequential monolith leach tests with a pseudo-diffusional leaching model in order to identify the release mechanisms of such heavy metals and to predict the long-term leaching behavior of cement mortars.