Search results

From XRD and XAS, the results confirmed the phase transformation of CuO to Cu foil and Co3O4 to Co foil in Co-promoted catalysts after reduction.
After reduction in H2, both reduced catalysts showed the mixed phase of CoO and Co foil with the edge energy of 7709 eV.
Reference Edge energy(eV) Sample Edge energy(eV) 0.05Co-Cu/ZnO 0. 5Co-Cu/ZnO Co(NO3)2 7719 precalcined 7719 7719 Co3O4 7723 calcined 7723 7723 CoO 7720 reduced 7709 7709 Co foil 7709 used 7720 7720 By looking at the moduli of EXAFS Fourier transform and the structural data of 0.05Co-Cu/ZnO and 0.5Co-Cu/ZnO as shown in Fig. 2, the precalcined catalysts showed the first peak of Cu-O shell at the distance around 1.52 Å, corresponded to the Cu(NO3)2 reference compound.
Sample Percent (%) C1 C2-C4 C5-C15 Methanol Cu/ZnO 2.9 8.7 17.3 71.1 0.05Co-Cu/ZnO 13.2 36.0 35.8 15.0 0.5Co-Cu/ZnO 8.1 29.0 61.3 1.6 Conclusion The phase changes of Cu and Co from calcination, reduction, and FTS were clearly observed by XAS.

In the practical use, the vibration and sound level of a kind of valve is proved to be too high to maintain the acoustic performance of ships．In this paper, the three-dimensional geometry and CFD model of a typical sea valve is established．Then the flow fields inside the valve, flow characteristics, drag reduction characteristics and noise characteristics were analyzed, as well as the fluid-solid coupling response between the flow field and the valve structure.
In this paper, study was proceeded on three dimensional simulations of a sea valve's hydrodynamic and noise characteristics．For the internal flow fields inside the valve, flow characteristics, drag reduction characteristics and noise characteristics are analyzed, as well as the fluid-solid coupling responses between the flow field and the valve structure.
Fig. 2 Pressure, velocity and noise color maps of the flow From Fig. 2, it can be seen that the velocity increases and the pressure decreases when the fluid flows through the valve orifice, caused by the sudden reduction of cross-sectional area.
By comparing the coupling data of two optimization schemes with the original scheme, the stress and deformation are listed below.

Nickel(Ni)-silver(Ag) core-shell nanoparticles with different shell thickness were synthesized with Ni nanoparticles by liquid phase reduction technique form water solution.
Then, reductions (glucose and tartaric acid) were added dropwise into start the reaction at room temperature.
The detailed data were shown in Table 2.
Table 2 The effect of molar ratios of Ni to Ag on diameter of Ni-Ag core–shell nanoparticles Molar ratios of Ni to Ag Diameter of Ni-Ag core–shell nanoparticles (nm) Ni percentage in weight (%) Ag percentage in weight (%) a 1.5 85.7 55.77 44.23 b 0.75 98.8 28.23 71.77 c 0.5 118.4 18.30 81.70 d 0.375 121.5 16.81 83.19 Conclusions Nickel(Ni)-silver(Ag) core-shell nanoparticles with different shell thickness were synthesized with Ni nanoparticles by liquid phase reduction technique form water solution.

An example of using the model is presented by applying published data while showing mechanism of stress relief during stretching.
Analysis indicates that it is stretch-caused convergence of the free lengths of strips in beam that lead to reduction in the residual stresses.
Then, the actual data of the material will be applied to the model to illustrate the key factor which determines the residual stress and mechanism of stress relief.
Data of the residual stresses of 7050-T74 plate is shown in Fig. 6(a), which were obtained by the crack-compliance method [12] conducted by Michael B.
Fig.8 Variation of rolling direction residual stress of the stretched beam The trend of stress reduction in the given layers is shown in Fig.9.

Such observations are quite in accordance with reported data [24].
The data shows that the samples are composed of almost pure silver with only a few other elements detected.
The diffraction peaks are indexed to the face centred cubic (fcc) phase of silver, which agrees to other reported data [25, 26].
The data showed that Ag emissions followed the relationship in Equation 3.
The data showed that this mixed polyol method resulted in the formation of ultrathin Ag NWs; and that the extent of DEG directly impacted the Ag NWs diameter.

For the purpose of fulfilling the services demands of the rail transportation, the elevated station has turned into a new type of transportation structure, and exercises a critical role in the reduction of the social transportation pressure.
This new type of urban rail structure exercises a highly important function in the reduction of China's domestic transportation pressure.
Besides, an accelerometer with high precision is select to be used to monitor and measure the actual condition of the changes in the acceleration; the INV306B intelligent signal automatic analytical system is utilized to process the data signal.
Vibration Control In view of the adverse effect caused by the vibration prevention to the elevated station, the designers are necessary to use the "compression resistance and vibration reduction" method after an analysis on the structure dynamics, with the purpose of ensuring the running trains not to bring excessively large vibration to the major structure of the elevated station.

The effect of TCE cometabolism degradation with glucose as electron donor on reduction progress was investigated with enriched nitrate, sulfate, trivalent iron and their mixtures under anoxic or anaerobic conditions.
All the data during the experiment were processed by Excel 2003.
Trivalent iron salt has different performance to TCE removal effects under anaerobic and anoxic conditions, which might because the Gibbs Free Energy with 4.53KJ/mol-1 of iron reductive half-reaction is well above the Gibbs Free Energy with -53KJ/mol-1 of TCE reductive half-reaction that will cause the promotion of TCE dechlorination, but under anoxic condition, the change of oxidation-reduction environment might facilitates the plentiful growth of iron-reducing bacteria but inhibits the growth of TCE dechlorination bacteria, which made to the addition of trivalent iron salt ultimately decreases the TCE removal rate.
In theory, the Oxidation-Reduction Potential (ORP) of sulfate reductive half-reaction with -207mV is far lower than ORP of the TCE reductive half-reaction with 550mV, causing markedly the promotion to TCE dechlorination[9], but in the experiment, the sulfate brought in the slight inhibition on the TCE dechlorination.

Surface roughness data forms one curve in roughness vs.
Surface roughness data for all hexagonal wheels form in one curve, i. e., Curve (I) as shown in Fig. 2 (a).
Data of Ra for conventional wheel form another curve, i.e., Curve (II) in Fig. 2 (a).
(a) data of hexagonal wheels and data of conventional wheel.
In the present work for machining a magnesium alloy, Ra data formed one curve for all hexagonal wheels in spite of the different hexagonal size, and another curve for conventional wheels.

Based on the land use data,Costanza ecosystem service value formula and correction parameter suitable for Chinasituations, the basin ecosystem service value is calculated to analyze the changes in leadingecosystem function ofGuanting ReservoirBasin in different periods.
In combination with the social and economic statistical data, the driving factors are discussed for changes in the leading function, and the approaches are put forward to enhance the upstream ecosystem function, so as to guarantee the sustainable economic and social development in the Basin.
Research methodologies The 1985 and 2010 spatial data on Zhangjiakou City ecosystem are obtained fromthe authoritative literature;the statistical data on the upstream and downstream social and economic situations are collectedfrom the statistical yearbook, the statistics bulletin of national economic and social development, as well asvarious plans for the environmental protection.
Supporting by the above spatial data and statistical dataon society and economy, the dynamic changes in basin ecosystem function are analyzed to discusses the approaches for enhancing the upstream capacity of ecosystem services.
This study is to conduct a tentative exploration of the temporal and spatialpattern of basin ecosystem service and eco-compensation relationship on the basis of the existing data and current knowledge.With increasingly complete data and deepening the related research theory in the future, thein-depth researchescould be carried out for the effect evaluation mechanismof basin eco-compensation, so as to access more accurate and scientific research results.

The thickness reduction was carried out in two passes and no intermediate annealing was carried out in between the passes.
The raw data were processed using Channel 5.0 software for orientation maps from scans of step size 0.5 mm.
Table 3 Flow forming parameters employed in the present work No. of Pass Reduction (%) Mandrel radius (mm) Roller radius (mm) Angle of attack of final roller Feed rate (mm/rev) 1st Pass 2nd Pass 48 47 87.5 87.5 132.5 132.5 30° 30° 0.714 0.892 Table 4 Different formability parameters observed during flow forming of the preforms Preform condition Parameters Spring-back (mm) Thickness Variation (mm) Ovality (mm) 1st Pass 2nd Pass 1st Pass 2nd Pass 1st Pass 2nd Pass Solutionized Preform 0.65 0.6 0.08 0.08 0.15 to 0.45 0.5 to 0.7 Tensile properties of the AFF and heat treated (AFF+170oC/6h and AFF+ST+170oC/6h) specimens are summarized in Table 5.
The reduction in strength is more for the second pass sample subjected to higher amount of cold deformation (72.5%).
The AFF specimen subjected to 48% thickness reduction (first pass) shows “pancake”-shaped grains elongated along the deformation direction.