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Online since: June 2014
Authors: Liang Chen, Wei Huang, Yong Feng Li, Kai Xuan Tan, Yang Hu, Yan Shi Xie, Zheng Qing Wang
The proportion of chemical speciations of uranium shows that the bound to carbonates>the bound to Fe-Mn oxides>the exchangeable>the residual>the bound to sulfide-organic matter speciation, which is beneficial to cost reduction on in-situ leaching of uranium and environmental protection.
According to the International Atomic Energy Agency, the newly site data, in global 1352 known uranium deposits, there are 530 sandstone uranium deposits, which accounts for 27.9% of the world's proven reserves total ,and the quantity and the reserves of it are among the first.In recent years,the 6 kinds of new large and super large sandstone type uranium deposit were found and proved in Cenozoic sedimentary basin in North China,and this greatly improving the status of sandstone uranium deposit in the uranium resources, and which become one of the four main industrial type uranium deposits in China.
Each cycle of uranium mineralization is related to the oxidation zone closely, and the regional interlayer oxidation zone of Sangonghe Formation V cycle is the main ore-bearing bed, in which is coarse grained sandstone in low permeability, the top and bottom is mudstone or shale and siltstone interbed, and ore bodies in the oxidation zone and reduction with the transition position.
All test data are shown in table 1 .According to the level of the desires of sequential chemical extraction of uranium grade value within a 5% soluble method, shows that the experimental data with high reliability.
The bound to carbonates’ uranium can be extracted under the condition of weak acid, the proportion of this uranium which is beneficial to the acid and pollution reduction is higher(mean of 44.62%).
Online since: July 2015
Authors: Mohammad Arif Kamal, Anwar Hussain
This study has demonstrated that, indicatively, it is possible to achieve up to 86% reduction in GHG emissions by increasing the amount of timber specified in buildings.
· At first, the research is normally conducted by gathering technical information including material safety data sheets, data tests of indoor air quality, product warranties, source material characteristics, recycled content data, environmental statement, and durability information
(WM) Waste Reduction(WR) Pollution Prevention(PP) Recycled(RC) Embodied Energy Reduction(EER) Natural Materials(NM) Energy Efficiency(EE) Water Treatment & Conservation(WTC) Non Toxic(NT) Renewable Energy Source(RES) Longer Life(LL) Biodegradable(B) Recyclable(R) Reusable(RU) Others(O) .
Pre-Building Phase: Manufacture · Waste Reduction The waste reduction feature indicates that the manufacturer has taken steps to make the production process more efficient, by reducing the amount of scrap material that results.
Building Phase: Use · Reduction in Construction Waste Designing a building with these standard sizes in mind can greatly reduce the waste material created during the installation process.
Online since: June 2014
Authors: Xiu Ping Wang, Chun Yu Qu
It plays a very important role in the area of energy conservation and reduction of pollutant emissions.
Foundation of design.The proposal of single-stage reduction gear is applied in electric vehicle, and then the higher performance of drive motor is required.
(2) nN means the rated speed of motor; ig means ratio of transmission;i0 means main reduction ratio;uN means conventional velocity of EV, and its international unit is km/h;means rolling radius of wheel.
The parameters calculated by formulas 1-5 meet the following basin principles[1]: (1) The max velocity can be calculated by rated data of motor; (2) The max grade ability can be calculated by short time characteristic curve; (3) The conventional velocity of vehicle should correspond with the rated speed of motor; (4) The power balance point of the vehicle max velocity should correspond with equal power section of motor continuous working characteristic curve.
Lieu, “Reduction of torque ripple in brushless dc motors,” IEEE Trans.
Online since: February 2015
Authors: Henry Hu, Li Fang, Shu Ping Wang
The microstructural analysis and porosity measurements suggest that the tensile property enhancement resulting from applied pressure should be attributed to microstructure refinement and porosity reduction of the squeeze cast alloy.
Introduction Weight reduction of automobiles for increased fuel efficiency and performance has stimulated interest in using magnesium alloys for various automotive applications.
Tensile Testing.The mechanical properties of the squeeze cast Mg-Al-Sr alloys were evaluated by tensile testing, which was performed at room temperature on an Instron machine equipped with a data acquisition system.
The improvement in tensile properties by the pressure increase should be attributed to materials densification and porosity reduction Figure 5: Effect of pressure levels on uts, ys and elongation of ams605 alloy.
The material densification and porosity reduction should be responsible for the increase in tensile properties.
Online since: August 2015
Authors: A.K. Lakshminarayanan, V. Karthik Srinivas, Jason Christopher Jolly
(a) (b) (c) (d) Fig.2 Corrosion morphology of the base and FSP samples after 5 hours exposure The EDS data for the processed metal after 8 hours (Fig. 3) shows an increase in the concentration of Al (~2%) in the corrosion products formed; in contrast, previous specimens showed no significant Al concentration in any of the corrosion products.
This can be attributed to a greater role being played by the secondary or β- phase due to the homogenization of the grains and a reduction of the cathodic role usually played by the noble β-phase.
(a) (b) (c) (d) Fig.3 Corrosion morphology of the base and FSP samples after 8 hours exposure The increasing exposure time (at 11 hours) results in pitting corrosion and formation of dolomite crystals on the surface of the base metal as is correlated by the marked increase in Ca concentration from the EDS data (Fig.4).
Further, the EDS data also shows a much greater CO2 concentration (of 30% - 40% at. wt.) in the base metal when compared to (8% - 10% at. wt.) the processed sample.
This is proof of the significant reduction in porosity affected by the FSP process.
Online since: August 2016
Authors: Mary Donnabelle L. Balela, Ellaine Datu
This suggests faster reduction rate.
Parallel reactions, e.g. hydrogen generation, also compete with metal reduction for the amount of reductant.
In the present system, the main oxidation reaction is the oxidation of hydrazine: N2H4 + 4OH- à N2 + 4H2O + 4e- (1) On the other hand, the primary reduction reactions are Cu deposition and H2 generation: Cu(II) + 2e- à Cu (2) 2H2O + 2e- à H2 + 2OH- (3) where Cu(II) represents all possible Cu species since there is an insufficient thermodynamic data to calculate the redox potential Cu oxyanions and hydroxyanions.
This indicates faster reduction at lower concentrations of gelatin.
As a result, less Cu(II) ions are available for reduction.
Online since: March 2010
Authors: Yu Feng Fan, Yong Jian Zhu, Shao Hui Yin
The reduction in radius.
Consequently, the 360 of data of reduction in radius can be obtained whenever the calculation of a whole revolution (360 steps) of workpiece has been finished.
Repeating this cycle for five same workpieces and measuring their roundness with a roundness measurement instrument give five data of roundness.
The average value of the five data is then regarded as the roundness under the given geometrical arrangement.
After resetting the geometrical arrangement and performing the same grinding and measuring process as above described, other data of roundness are obtained for the corresponded conditions.
Online since: January 2016
Authors: Kyaw Thu, Kim Choon Ng, Ang Li, Karan M. Sabnani
The obtained isotherm data are regressed by a new isotherm model.
Data acquisition and reduction are performed by Quantachrome HydroWin software.
It also illustrates the data regression by the new model of Equation 1.
The present data are displayed with 5% error bar.
The present data are displayed with 5% error bar.
Online since: June 2015
Authors: Giuseppe Greco, Fabrizio Roccaforte, Ferdinando Iucolano
On the other hand, annealing at 850°C led to a further reduction of RC , with a slightly increasing dependence of RC on the measurement temperature (here regarded as a “metal-like” behavior).
The experimental data could be well fitted with a thermionic field emission (TFE) model, i.e. with a dependence like [12] with and , FB and ND are the barrier height and the carrier concentration, and C1 is a function of ND, T and FB.
By the fit of the experimental data it was possible to extract a Schottky barrier height ΦB = 0.85 eV and a carrier concentration ND = 1.75´1019 cm-3.
In this case, the data were fitted by the function RC µ Tα, with α = 1.8.
As already demonstrated by combining X-ray diffraction data with EDX analyses on various parts of the layer, the Au-rich regions of such samples can attributed to the presence of the AlAu4 phase [16].
Online since: July 2012
Authors: Hong Hui Cheng, Jin Ping Pan, Jin Yao Zhang, Wei Guo Wang, Li Zeng
The operator could aquire the test data by the electronic load and work station operation software in the industrial computer.
Two 3-way switching valves were used to screen the water-bubbler when anode reduction of the NiO to Ni was carried out.
The operator could aquire the test data by the electronic load and work station operation software in the industrial computer (Fig.3).
Fig. 2 Process flow diagram of the SOFC single cell test device Fig. 3 Framework of system data acquision Fig. 4 Key test structure in sample room The size of SOFC single cell for testing was 5×5.8cm2 with an active area of 4×4cm2.
The reduction of NiO anode was performed under mixed flow stream of 0.1SLM H2 and 0.4SLM N2 for more than 5 h.
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