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Online since: September 2006
Authors: Krzysztof Wierzbanowski, Chedly Braham, Alain Lodini, Andrzej Baczmanski, Michael E. Fitzpatrick, Sebastian Wroński, Mirosław Wróbel
Residual stresses and texture in cross-rolled polycrystalline metals a) Copper A plate of polycrystalline copper was rolled to the reduction Red1=60 % and next four samples were cut out, which were cross-rolled to the reduction Red2 of 10 %, 40 %, 62 % and 80 %, respectively (Red1 is the rolling reduction in principal direction and Red2 - in perpendicular direction).
rolling reduction in cross direction (%) 0 20 40 60 80 -80 -60 -40 -20 0 20 40 σΙ22 σΙ11, σΙ22 (MPa) σΙ11 Fig. 2. σ I 11 and σ I 22 versus rolling reduction (Red2) along perpendicular direction for polycrystalline copper b) Low carbon steel The starting sample was rolled to Red1=74%.
A very good fit is obtained with experimental data, using our approach given by Eqs 3 and 4 (solid line in Fig. 3).
Rolling reduction in cross direction (%) 0 20 40 60 80 -100 -50 0 50 100 150 σΙ 11 σΙ22 σΙ 11, σΙ 22 (MPa) Fig. 4. σ I 11 and σ I 22 versus rolling reduction (Red2) along perpendicular direction for low carbon steel a b c Fig. 5.
rolling reduction in cross direction (%) 0 20 40 60 80 100 Second order stress (MPa) 0 20 40 60 80 100 Fig.6.
Online since: November 2011
Authors: Jing Fan
Furthermore, two approximation algorithms are presented, and algorithms' performances are considered through the experiments with large amounts of data.
Proof: we use a reduction from the Partition problem which is known to be NP-hard.
It is clear that the reduction can be done in polynomial time.
We design several group data to test the performance of FFDA and SPTA.
Online since: April 2012
Authors: Srini Raghavan, Pierre Deymier, Sangita Kumari, Eric Liebscher, Satish Kumar Singh, Mark Beck, Manish Keswani
Data for the plot were generated from the numerical solution of Eqs. 1 through 8.
Fig. 1B displays the SL data collected on NH4OH/CO2 system at a constant pH 5.7.
The data show a well controlled decrease in SL with increasing CO2(aq) concentration.
Fig. 3 presents experimental data collected on different DMSO-water mixtures.
The data clearly shows that increasing concentration of DMSO decreases SL generation, indicating that free radical scavenging could indeed lead to reduction in SL intensity.
Online since: March 2010
Authors: Zhi Yi Miao, Shi Xian Yuan
With the analytical model presented here, substantial reduction in computational time is achieved in the predictions of machining workpiece temperature rise.
Coelho's [11]experimental data is used ,as shown in Table 1 and Table2.In his research the workpiece material is hardened AISI4340 , with a diameter of 200mm long and 55.5mm diameter .Eq.7 gives an exact analytical solution of the band heat source moving in a semi-infinite medium, which is near to the primary heat source .The area of Using the principle of interpolation , isotherms of temperature are plotted as shown in Fig 5.
z mµ Tab 1 Cutting data from Reginaldo T.
The model is verified with experimental data of temperature rise on AISI4340 (Coelho).Compared to FEM approach, considerable reductions in simulation time can be achieved, and give a good way to select the proper machining conditions.
Online since: June 2014
Authors: Venkatesan Rengarajan, Ezhilan Jayabal, Rajesh Rajendiran
Table 2 EDS Data for Nitrogen Doped Graphene Oxide (NGO) EDS Data.
Table 1 EDS Data for Graphene Oxide (GO) Element Weight % Atom % C 63.68 70.02 N 00.00 00.00 O 36.32 29.98 Total 100 100 Element Weight % Atom % C 70.91 76.23 N 2.52 2.32 O 26.57 21.45 Total 100 100 Dielectric Properties Fig. 4 Dielectric Variation with Temperature for Graphene Oxide (GO) Fig. 3 Dielectric Variation with Temperature for Graphite (GR) The dielectric constant value of graphite (GR) and graphene oxide (GO) with the variation of temperature in the range of 30 °C - 270 °C is studied.
Woo, Electrochemical oxygen reduction on nitrogen doped graphene sheets in acid media, Electrochemistry Communications 12 (2010) 1052-1055
Xia, Synthesis of nitrogen doped graphene with high electrocatalytic activity toward oxygen reduction reaction, Electrochemistry Communications 28 (2013) 24-26
Hou, Electrocatalytic activity of nitrogen-doped graphene synthesized via a one-pot hydrothermal process towards oxygen reduction reaction, Journal of Power Sources 227 (2013) 185-190
Online since: July 2014
Authors: Yi Hua Mao, Bing Xi Han
However, according to the statistics data, energy consumption per unit GDP in China is 2.2 times of the world average level [[]Zhanqiang Fang, Guanping Ren.
Energy conservation and emissions reduction in construction is significant for the sustainable development of China.
The data on energy consumption and carbon emission by machines is listed in Table 5.
Therefore, there is large potential in material and machine carbon reduction.
Recently, scholars have proposed new carbon reduction material to update the SGP.
Online since: June 2015
Authors: Hervé Peyre, Thierry Chassagne, Sandrine Juillaguet, Pawel Kwasnicki, Roxana Arvinte, Adrien Michon, Marc Portail, Marcin Zielinski
Below, the reduction of carbon supply resulted in a decrease of film growth rate.
Thus, to simplify the data presentation, both C-V and SIMS results will be referred to as “dopant incorporation”.
Assuming a power-like regression [N]∝CSik, by fitting the experimental data we obtain the exponent k≈-4 and k≈-1.5 respectively on Si- and C-face.
The C/Si ratio was thus modified without a reduction of the deposition rate.
For this data series, the C/Si ratio was adjusted by changing the propane flow rate and, consequently, the growth rate decreased for low C/Si ratios.
Online since: October 2014
Authors: Fan Dong Zheng, Bing Hua Li, Xiao Juan Cao, Li Cai Liu, Ni Zhang
However, groundwater quality in the southeast of Beijing was subject to change because that aquifer was in relative reduction environment.
Here based on the monitored data, GWHP in five fields were selected to analyze their effects on temperature and quality of groundwater.
In this study, three GWHP with different distances between those wells were selected and changes of groundwater temperature were analyzed according to the monitored data. 2.1Thermal breakthrough Field A was located in piedmont alluvial plain of Beijing.
Monitored data indicated that temperature changes of groundwater and recharged water were steady.
Monitored data showed that increasing dissolved oxygen of groundwater urged to nitration reaction.
Online since: February 2016
Authors: G. Srinivasa Rao, C.S. Venkatesha, M. Vishwas, M. Vinyas
Introduction For any space mission to be successful it is necessary to guide the satellite to revolve in the right orbit and gather all the required data without any flaws.
By replacing the conventional space craft materials by the composites, mass reduction can be achieved as high as 40 percent [5].
(Stiffness requirement) · The mass reduction must be 25% or more compared to existing Aluminium model
Layup Thickness (in mm) 1st natural frequency (in Hz) Mass (in grams) % Reduction in mass 1 [0/45/0/45/0/45] 0.6 109 133.4 48.7 2 [0/45/0/45/0/45/0/45] 0.8 143 177.8 31.6 Results show that, even though an appreciable mass reduction has been achieved, the specified stiffness requirements are not met.
· An effective increase in mass reduction (47.3%) has been achieved
Online since: April 2025
Authors: Nurul Izrini Ikhsan, Nurul Atika Sutiman, Nur Fadilla Samsudin
The XRD data for GO revealed a distinctive peak at 10.1°.
Additionally, the prominence of the D band at 1346 cm-1 indicates a reduction in the size of the in-plane sp2 domains, possibly due to extensive oxidation.
This change suggests a decrease in the average size of the sp2 domains following the reduction of exfoliated GO [14].
Therefore based on the result obtained, it can be inferred that GO did not undergo any reduction process during the reaction with chives extract.
Excess-reducing agents can cause rapid and uncontrolled reduction of Ag+, resulting in the creation of many AgNPs.
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