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Online since: February 2013
Authors: Blanka Galbičková, Maroš Soldán, Ľubomír Čaplovič, Kristína Gerulová
Then slurry was dried at 110 °C and annealed at 550 °C for 2 hours. [10] Morphology of samples was documented by scanning electron microscope TESLA BS 500 and JEOL JSM 7600F and phase analysis was carried using diffraction techniques from experimental data measured by X-ray Philips PW 1710 diffractometer using a Co anode and a secondary graphite monochromators.
After activation of the surface of red mud the reduction of Ca, which is caused by a reaction of calcium ions with HCl, was observed.
Activation again caused a reduction in calcium phases, but iron oxides, which prevailed in black nickel mud, retain their original form.
A comparison of Fig. 7 and 8 shows that the activation of the surface of black nickel mud caused significant fragmentation of particles, that ultimately increased the specific surface area mainly due to a reduction in particle diameter.
Studying the X-ray diffractograms of activated and non-activated forms of red mud and black nickel mud was determined that activation of red mud lead to a significant reduction in CaCO3 content and activation of black nickel mud caused a significant decrease of CaCO3 and schorlomite.
Online since: December 2011
Authors: Jian Yu Zhang, Li Bin Zhao, Yue Fu
Introduction Weight and production cost reductions are important goals for aircraft structural researchers and engineers.
The integrated composite structures are gradually used in airspace structures due to their advantages of reduction in fastener and part counts, which lead to a dramatic decrease of assemble cost and primary structural weight [1].
The residual strength data exhibits a large scatter and the ranger is 345N.
Experiment data for static test No.
Online since: November 2012
Authors: A.P. Manoj Kumar, Nayak S. Nagaraj
Dynamic Coefficient of Friction Raimondi and Boyd [6] have studied numerical simulations on the relationships between the various parameters that govern the design of fluid film bearings and published graphical data to facilitate the design of journal bearings.
The study results revealed that the calculated static coefficient of friction values is very close to experimental results and also indicated that with the increase in film thickness the reduction in static coefficient of friction.
As the journal speed is increased, pressure in the oil film overcomes the friction and reduction in coefficient of friction is noticed.
journal bearings”, Materials and Design, Volume 28, 2007, Pages 973 – 977 [2] Dong-Hyun Lee, Young Cheol Kim and Kyung Woong Kim, “The effect of coulomb friction on the static performance of foil journal bearing”, Tribology Transactions, Volume 52, Issue 2, 2009, Pages 146 – 156 [3] Dong Jin Park, Chang Ho Kim, Gun Hi Jang and Yong Bok Lee, “Theoretical consideration of static and dynamic characteristic of airfoil thrust bearing with tilt and slip flow”, Tribology International, Vol. 41, Issue 4, 2008, Pages 282 – 295 [4] Yao Zhenqiang, Zhang Qi and Tao Yamin and Zhang Xueping, “A new approach to measure the friction coefficient of micro journal bearings”, Tribology International, Vol. 33, 2000, Pages 485–494 [5] Lin and Hwang, “Static and Dynamic characteristics of long porous journal bearings”, Journal of Physics, Volume 27, Issue 3, 1994, Pages 634 – 643 [6] A Text book on “Mechanical Engineering Design”, Joseph Shigley, Mc-Graw Hill Publication, 2010 [7] “CRC Tribology data
Online since: October 2006
Authors: Moo Young Huh, J.K. Kim, Jael Chul Lee, Han Gil Suk
The strain history data extracted from the FEM computations were also utilized to simulate the deformation textures at various layers throughout the sample thickness.
These composites were inserted jointly into the rolling mill and cold rolled to a thickness reduction of 30%.
The work hardening data for the aluminum sheet were taken from experimental flow curves of alloy AA3003.
It indicates that the mid AA3003 sheet sandwiched with STS430 deforms more than that with AA3003 at a given same thickness reduction imposed on the composite.
Online since: June 2010
Authors: Hong Bo Wang, Guo Cheng Sheng
According to position data the original triple arbitrary surfaces and wheel data of NURBS, modeling for impeller
Result of experimental analysis shows in table 2 for rough milling and semi-finish milling[5], as can be seen from Table 2, tool path reduction 35% and increased efficiency 35% of algorithm in paper relative to traditional ball-tool Rough milling.
For semi-finish milling, tool path reduction 50% and increased efficiency 35.5% of algorithm in paper relative to traditional crafts. the flank milling was a good method to replace the point milling, (a) solid rough (b) flow channel after rough Fig. 1. schematic diagram of impeller rough Y N Original leaf Take first I flow line of concave lid and tray( 3≥I ) Initial ruled surface '1α Calculated h∆ I←i+1 h∆ ≥ 2h∆ Obtained 1α allowances 2h∆ Fig. 2. the flow diagram of ruled surface algorithm Fig.3. entity impeller NC Table. 1 process parameters of rough milling and semi-finish milling Process parameters rough milling semi-finish milling Allowance(mm) 1.32 0.48 Tool diameter φ16 alloy mills Spindle speed(r/min) 1500 2000 Feed(mm) 5.0 10.0 Cutting depth(mm) 4.0 8.0 Table. 2 experimental analysis of rough milling and semi-finish milling Experimental parameter rough milling semi-finish milling
Online since: May 2011
Authors: Yue Zhu Yang, Yang Sun, Dao Wu Yang, Yun Yun Zhang, Hai Xia Tong
The spectrum data indicated that the target compounds had been synthesized.
In the anodic domain, we note in the presence of compound inhibitor resulting in a reduction of the current densities without change of the anodic slope.
The analysis of the results obtained shows that the increase of the compound inhibitor concentration is accompanied by a reduction of the Icorr, and consequently an increase of inhibition efficiency follows.
Electrochemical Impedances Spectroscopy.The inhibition properties of compound inhibitor were evaluated by the measurement of the polarization resistance recorded after 30 min of immersion of the electrode in the 5% hydrochloric acid .The impedance data were analyzed using the equivalent circuit (EC) model, where Rp represents charge transfer resistance and Cd the constant phaseelement.
Online since: September 2013
Authors: Huan Liang, Xue Song Zhou, You Jie Ma
On the basis of it, [28] improves the above model and through the field measurement verifies voltage lower case power recovery phenomena existing, also describes the load well with measured data of the low voltage power recovery features.
Integrated Load Order Reduction And The Comprehensive Load Model.
As can be seen from the field measurement data, the dynamic process presented by comprehensive bus load is the first or second order inertial link section.
Load the order reduction characteristics enlighten us: comprehensive load model cannot be established very accurate, load modeling task is to establish a simple and meanwhile can describe the generality of the load model.
Online since: April 2014
Authors: Bin Yong Li, Ran Tian
Rough set theory is that knowledge is the ability to classify objects, based on the indiscernibility relation introduced a concept of upper and lower approximation and so on to describe the uncertainty of knowledge, the importance of measurement attributes and the dependency of knowledge, through attribute reduction and value reduction process such as imprecise, uncertain and incomplete data analysis and processing of rules was obtained from the original data set and knowledge.
Online since: August 2018
Authors: Wim van Paepegem, Wouter de Corte, Arne Jansseune, Jan Peeters
Individual plies were modelled as continuum shell elements (SC8R) with elastic properties from UD-data as calculated with ElamX software based on 1200gr/m² E-glass fiber and polyester resin.
Ply failure was described by the Hashin criterion based on data provided by InfraCore while the damage evolution parameters were estimated based on literature.
For a 2° ply stacking, elastic stiffness analysis in Abaqus Standard indicates a 10% reduction of the longitudinal stiffness, whereas failure strength analysis in Abaqus Explicit indicates a 25% reduction of tensile strength, attributed to combination of a smaller effective section in failure zone, a stress concentration due to the local geometry, and an eccentricity between the resultant tensile force and the local section.
Online since: October 2014
Authors: Li Gong Cui, Yan Yan Cao, Xiang Guang He
Tobacco slices cannot be blended and the precision is low. 2) Reduction box broken: The control machine is under operation but the reduction box does not, which leads to the stillness of the transmission belt.
The data collection of all the scale will be through plc.
The communication and exchange of data will be through Ethernet.
Showing 11251 to 11260 of 40357 items