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Online since: December 2011
Authors: S.A. Teryusheva, G.S. Beloglazov, S.M. Beloglazov
Such corrosive media appear as a result of active sulfate reduction [1].
In sea water, pitting corrosion would develop under the influence of SRB; active sulfate reduction leads to significant hydrogen absorption by steel.
Eh defines sulfate reduction rate.
Data obtained for steel St3 corroded at OC concentration of 5 mMol×dm–3, are presented on Fig. 3.
Table 1 contains experimentally measured efficiencies of OС action inhibiting corrosion of steel St3 that have been determined gravimetrically on the basis of measurements performed at corrosion media with SRB, as well as the data on OC efficiencies of inhibiting hydrogen absorption by steel.
Online since: May 2015
Authors: Tawatchai Charinpanitkul, Sira Srinives, Kanin Selamassakul, Navapass Peaunbida, Suchaporn Jiamjitton, Chinnawich Phamornnak, Chotiros Plabplueng, Bovornlak Oonkhanond, Worasak Klongthong
The IR transmittance of rGO appeared to be relatively flat, indicating disappearance of functional groups after the chemical reduction with L-AA.
However, it was observed that the error bar of the sensing response at pH 3 was exceptionally high, which requires further investigation with more sensors and sensing data.
The data were interpreted from two identical sensors.
Conclusion The rGO was successfully synthesized by a modified Hummers method, followed by chemical reduction with L-AA.
Guo, Reduction of graphene oxide via L-ascorbic acid, Chemical Communications, 46(2010) 1112-4
Online since: May 2022
Authors: Wan Ryan Asri, Afrianti Meilani, Nova Yuliasari, Hasanudin Hasanudin
FFA reduction (X) was calculated according to the initial and remaining free fatty acid concentration difference.
The data can be considered valid if the determination coefficient value is close to 1.0 [8].
Fig. 2 Shows the correlation between the experimental and predicted value from the mathematical model of FFA reduction.
Thus, the kinetic model can well predict the reduction of free fatty acids.
Validation data shows that the kinetic equation model can be accepted for calculating free fatty acid esterification of SPO kinetic with a determination coefficient of 0.9612.
Online since: April 2013
Authors: Livan Fratini, Marion Merklein, Wolfgang Böhm, Davide Campanella
For instance, chassis exclusively made of aluminum sheet metals provide weight reductions for a mid-class car body of 200 to 300 kg [1].
The experimental analysis was carried out to obtain the material behavior using different numbers of cycles, and to validate the numerical results in comparison with the data measured during the experimental tests (such as the pressure on the lateral arms of the roll and velocity of the roll themselves).
The entry thickness (hin) and the width (win), the exit thickness (hout) and the width (wout), the reduction per cycle and the measured separating forces, on the two sides of the roll, are given in this table.
Once the material behavior was inserted into the code, in order to compare the numerical model with the real case, the machine output data and the results of the numerical model were compared.
Furthermore, the 2D model can be used also to predict other tool parameters, such as the maximum reduction to be applied or the maximum pressure on the roll or even the rolling velocity.
Online since: September 2005
Authors: Dong Nyung Lee
The drawing textures of aluminum, copper, gold, silver, and Cu-7.3% Al bronze wires are approximated by major <111>+minor <100>, except silver wire, which can have the <100> texture at extremely high reductions.
Introduction The drawing textures of aluminum (stacking fault energy (SFE): 166 mJ/m2 [1]) [2], copper (SFE: 78 [1]) [3,4], gold (SFE: 45 [1]) [4], silver (SFE: 22 [1]) [5], and Cu-7.3% Al bronze (SFE: <20) [6] wires are approximated by major <111>+minor <100>, except silver wire, which can have the <100> texture at extremely high reductions.
The drawing textures of aluminum [2], copper [3,4], gold [4], silver [5], and Cu-7.3% Al bronze [6] wires are approximated by major <111>+minor <100>, except silver wire, which can have the <100> texture at extremely high reductions.
(left) β-fiber intensity lines of Cu-16%Mn alloys after various rolling reductions [8].
The mobility data of tilt grain boundaries in aluminum [16] show that the average mobility of a <111> tilt boundary is increasingly higher than that of a <100> boundary with increasing temperature.
Online since: May 2016
Authors: Rexhep Shaqiri
The results indicate options for reduction of the loses by replacement of old type of transformers and preparation of the MV system for upgrade and change the voltage level from 10 kV to 20 kV.
This paper analyses the reduction of technical losses when the existing 110/10 kV transformers are replaced with 110/20 kV transformers, and the MV grid voltage is changed from 10 to 20kV.
A reduction of network losses would make an important contribution to the EU’s plan to increase energy efficiency in electricity supply.
Total loss of the active power and reactive in the whole power system of Kosovo Reducing the losses in substations “Prishtina 2” and “Prishtina 3” by replacement of the old type of transformers and cables and change the MV voltage level from 10kV to 20kV A study was conducted in order to estimate the option for the reduction of the technical losses when the transformers 110/10 kV are replaced with transformers 110/20 kV, transformers 10/0.4 kV replaced with transformers 20/0.4kV and power distribution cables with section 95 mm2 with new cables with section 150 mm2 in substations “Prishtina 2” and “Prishtina 3”.
References [1] Data from KOSTT –transmission system and market operator; [2] Hadi Saadat, Power System Analysis Third Edition 3rd (third) EDITION.
Online since: August 2013
Authors: Qian Tian, Ting Yao, Fei Guo, Shou Zhi Zhang
The measured shrinkage reduction was up to 55.3% at the age of 180d of drying.
The datas in table 4 show that expansion increases with the increasing of dosage of UMEA replacing of cement.
Furthermore, there is a significant reduction with respect to the reference cement pastes in the drying shrinkage at the end of testing age from 0.304% to 0.136%, which the shrinkage reduction is up to 55.3%, when the amount of UMEA is 10%.
The datas in table 5 indicate that, the cement mortars with UMEA have larger restrained expansion and lower restrained shrinkage than the cement mortar without UMEA.
When the amount of expansive agent is 10%, the measured drying shrinkage reduction was up to 55.3% at the age of 180d, the initial cracking time is delayed by 17d and the crack width is only 1/6 of the reference mixture. 3) When the deformation was restrained, the cement mortars with UMEA have larger restrained expansion and lower restrained shrinkage than the cement mortar without UMEA.
Online since: February 2014
Authors: Shou Ming Zhou, Qing Jie Sun, Ji Gui Zheng, Hong Xing Wu
Torque Ripple Reduction of Switched Reluctance Motor by Optimizing Stator Pole Type Hongxing Wu, Qingjie Sun , Jigui Zheng, Shouming Zhou School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, China awhx0422@sina.com, bsqj0602@126.com , c zhengjigui@163.com, d zhoush.m@163.com Keywords: Switched Reluctance Motor; Torque Ripple; Structural Optimization Abstract.
Therefore, the improvement of motor design improvements can realize the reduction of torque ripple to some extent.
Torque waveform of 60° wedge angle Different wedge angles have some influence on the torque ripple at the cost of average torque, specific data as follows: Table 1 The torque ripple coefficient of different wedge angles Original scheme Improved 90° wedge angle 60° wedge angle KT 1.22 0.71 0.81 1 After comparison, it’s clear that the measure to improve stator poles slows the abrupt change of torque effectively when stator poles coincide with rotor poles.
Learning Rate Functions in CMAC Neural Network Control for Torque Ripple Reduction of Switched Reluctance Motors[J].
Online since: February 2014
Authors: Hao Qin, Chun Li
First order phenomenological model Neo-Hookean model is a proper material constitutive model based on single uniaxial tension test data.
Fig.2 Uniaxial tension test data Fig.3 Uniaxial tension test results of silicon rubber of semi-conductive layer 3 Results and discussion Figure 4 shows the von-Mises stress distribution, the maximum value of von-Mises stress 0.27 MPa is occurred at the boundary of silicon rubber and inner semi-conductive layer because expansion ration and hardness of them are different.
High stress or stress concentration of rubber can cause the reduction of long-term performance of rubber since the stress relaxation.
Higher interfacial pressure could result in a reliable electric strength but also lead to larger stress of silicon rubber which can cause the reduction of long-term performance of rubber.
Online since: May 2014
Authors: Abdolreza Ataei, Mark A. Bradford
All connection components were taken as being the same size as used in the experiments against which the method is calibrated, and furthermore the model does not need recourse to empirical push-out test data.
The increment in the load capacity is only 1% for 150% of minimum pretension and the reduction in the load capacities are 2%, 4% and 8% for 75%, 50% and 25% pretension, respectively.
The modelling is simplified in its treatment of concrete in tension as being quasi elastic-plastic, and it has the facility to handle the stud shear connectors in a discrete fashion rather than by the use of springs and empirical push test data.
The technique was shown to be accurate when compared with comprehensive test data reported elsewhere, and it provides an efficacious means for structural modelling in order to develop much-needed design guidance for this application of composite structures technology.
(v) Reductions in the degree of shear connection cause decreases the load capacity of the composite joints and increases in deflection.
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