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Online since: December 2011
Authors: Bin Yang, Tao Xu
It was found after be injected La in catalyst that cathode not only had better oxygen reduction activities, but La also could reduce solubility of catalytic phase [4].
It could be found from 3D images that particle sizes of D were more small and more homogeneous than it of other samples, and the relevant data of these samples by SPI3800N-Spiwin software was shown in Table 3, in which, RMS is Roughness of Mean Square.
Table 3 AFM image data conclusion of A-2, B-2 and D samples Sample A-2 B-2 D RMS [nm] 0.3189 0.2930 0.2879 Average partical size [nm] 43.60 41.31 38.55 Conclusions By IBS technology and annealing technology, a new type of Pt/C membrane electrodes --, PtCu-LaOx, LaOx-PtCu and PtCu-LaOx-PtCu composite multi-layer membrane electrodes could be manufactured.
Online since: December 2014
Authors: Marcos F. de Campos, N. Vicente, I.F. Machado, D. Rodrigues, M. Alberteris Campos, K.S.T. de Souza
The data, such as vacuum level and displacement and pressure applied, can be recorded as a function of the time.
The ram displacement stands for powder accommodation and the reduction of pores.
Recorded data obtained (acquisition system) as a function of time.
Online since: December 2013
Authors: Hong Xu, Xiao Wang, Xue Ping Mao, Sai Dong Huang, Yong Zhong Ni, Chao Li
Table 1 Chemical composition of T92 steel % C Si Mn P S Ni Cr Nb V Al Mo N W B 0.112 0.39 0.45 0.011 0.002 0.22 8.52 0.065 0.189 0.005 0.37 0.055 1.66 0.0036 GB/T2039-1997 Metallic materials-Creep and stress-rupture test in tension and A code of practice for conducting notched bar creep rupture tests and for interpreting the data[3] are referred.
For both the standard sample and the notched sample, the plastic deformation of fracture, which is characterized by reduction of area, increased with the improvement of stress level.
A code of practice for conducting notched bar creep rupture tests and for interpreting the data[S].
Online since: November 2013
Authors: Stanislav Rusz, Ivo Schindler, Petr Kawulok, Rostislav Kawulok
Most of the tests could be finished after reaching the true (logarithmic) height reduction almost 0.5 and then water-quenched.
Strain to peak epeak depends also on parameter Z: (3) All material constants in the Eqs. (1-3) were determined by regression analysis of experimental data.
Analysis of the registered data eliminated the possible effect of changes in temperature or of strain rate during compression tests.
Online since: September 2013
Authors: Yao Zhao, Hong Bing Zhu, Bo Xia
(1) According to the experimental data statistics, fatigue deformation modulus reduction coefficient of the regression equation can be expressed as follows:
In the field of RC structure constant amplitude fatigue test, at present mainly focuses on the description of the phenomenon of experiment and data processing, the study of mechanism of fatigue, fatigue damage model is not enough thorough, only with a simplified calculation method for fatigue design, so the fatigue study also has a long way, to be rapid development.
Online since: March 2013
Authors: Petr Slobodian, Robert Olejnik, Pavel Riha, David Petras
The best description of the data presented in Fig. 3 is obtained by the series heterogeneous models when the resistance is described as the sum of metallic (MWCNT are regarded as metallic conductors) and barrier portions of the conduction path [6-9], (1) where a means the temperature coefficient arising from metallic conductance and the second term (hopping/tunneling term) represents fluctuation-induced tunneling through barriers between metallic regions.
As follows from Fig. 3, Eq. 1 describes conductance data very well.
An obvious effect of the supporting polymer is a reduction of the temperature dependence of conductance.
Online since: July 2012
Authors: Shao Guo Wen, Jin Shen Chen, Hong Mei Zhi, Wen Xi Cheng
Through the control of acidity, using sulfuric acid to improve Cr2O72- oxidation capacity, relatively improve the ferrous ammonium sulfate reduction ability.
Quality control chart is a quality management approach 1924 by the United States W.A.Shewhart was first used in the production.He pointed out that every method has its variability,are affected by time and space effects, even under ideal conditions to obtain a set of data also have random error, but when a certain results beyond the random error of the permitted range, by using the method of mathematical statistics [9], can determine if this result is abnormal, not credible.
In the elimination of the error of the system under the premise, if using a new method for testing, analysis results in quality control chart control state, data is accurate and reliable, so it is concluded that the new method is reliable.
Online since: August 2013
Authors: Xue Tang, Yu Qian Zhao, En Lin Yu, Dong Xiao Hou
This is because with the increment of plug position, the rolled pieces is under resistance ahead of time, the perforating speed slows down and the rolling pitch decreases, while contact area between rolling in the top front and roll is reduced, which will lead to the reduction of rolling force.
We select cross-section of stable rolling area as a measurement section, respectively, measure three sets of data of the outer diameter, inner diameter and wall thickness, and measure the data of 10 points in each group.
Online since: February 2014
Authors: Xin Yuan Zhou, Pei Jing Shi, Wen Yu Wang, Bo Hai Liu
The statistical data shows that car ownership in China reached 49.57 million in 2008 (excluding motor at low speed), the machine tools were over 7000 thousand, and 14 kinds of main types of engineering machinery reached 2.9 million [5].
Implementation of remanufacturing will bring us cost reduction, energy conservation, material saving and environmental protection.
Remanufacturing technology standard system Series of common technical standard in cross-industry Concept layer Technical terms of remanufacturing standards Definition standards of remanufacturing technology Essential data standards of remanufacturing technology Solution layer Guidelines standards of remanufacturing Technical method standards of remanufacturing Evaluation standards of remanufacturing Target layer General technical requirements standards of remanufacturing Series of common technology standards in key industries Machinery industry Automotive industry Other industries Remanufacturing Technology Guide Remanufacturing Technology Guide Remanufacturing Technology Guide Technical require- ments standard Product management standards Techni- cal evalua- tion standards Technical require- ments standard Product management standards Technical evaluation standards … … … Technical standards of key products Engines, machine tools, generator, gearbox, excavators
Online since: December 2010
Authors: Ming Li Sun, Hai Rong Cui, Bin Wang, Feng Zhan, Shuang Lu
For example, magnetic liquids can play an important role as sealing device, sensor, drug targeting, and viscosity drag reduction.
Defining a magnetic vector potential A such that (4) Finally, by substitution in Eq. (1) through Eq. (3), arrive at the following vector equation to solve: (5) Simplifying to a 2D problem with perpendicular currents that are 0, this reduces to (6) An example magnetization curve is shown in Figure 2 where we present data for the pure magnetic fluid HM1#.
Magnetization curves can be approximated by simple two-parameter arctangent functions of the form [4] (7) Superimposed on the magnetization data of Figure 2 is an arctangent curve that can be used to model magnetic fluid magnetization.
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