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Online since: February 2024
Authors: Ojo Sunday Isaac Fayomi, Olayemi Abosede Odunlami, Muyiwa Fajobi, Oluwamayowa Ogunleye
Potentiodynamic polarization data was obtained from potential of -1.5 to + 1.5 V versus open circuit potential at a scan rate of 0.01.
The data revealed that CD inhibitor occurred predominantly as cathodic inhibition.
Furthermore, Table 3 shows the data of potentiodynamic polarization curve for 1.5 M HCl solution with different concentrations of CD inhibitor.
Chemical Data Collections, 32, (2021) 100660
Chemical Data Collections, 17, (2018) 321-326
Online since: May 2020
Authors: Chen Wang, Gang Wen, Yan Jiao Zhang, Yi Liu, Shi Wei Ren
Study Method and Data Definition of Product Category.
Table 1 Data inventory of ceramic tile production Item Substance Unit Qty.
(1) Designating background data 1% of the contribution value to the environmental impact is taken as a “rule of choice”.
Process excluded 1 Field emission 1 Diopside production 2 Use of electric power 2 Use of feldspar 3 Use of diesel oil 3 Talc production 4 Use of soft coal 5 Use of natural gas 6 Water-sorted soil production 7 Feldspar sand production 8 Clay production 9 Quartz sand production 10 Road transport (2) Determining enterprise’s on-site process data Based on the above background process included, the enterprise shall collect corresponding on-site process data and raw material consumption data.
Collection range of the enterprise’s on-site process data as finalized is shown in Table 4.
Online since: November 2012
Authors: Rong Zhang
But the random and irregular load time history curve gained at wind farm is irregular, in which many data are ineffective for the fatigue analysis, these ineffective data can be deleted when making statistics treatment [12].
The method to modify S-N curve is the reference stress amplitude of finite life region multiplied by one reduction coefficient SPu: (3) In the Eq.3[5], when reduction coefficient SPu =2/3, its relative survival rate Pu>97.7%( i.e. the mean reduces 2 times standard deviation) If considering the casting defects like chill, crack etc, it has the casting defect coefficient St (4) In Eq.4[5], t is the thickness influence coefficient.
Online since: June 2014
Authors: Eng Juraj Králik
According to EN1992-1-2, EN1993-1-2 and EN 1994-1-2 the assessment of structural behavior in a fire design situation shall be based on one of the following permitted design procedures: Ü recognized design situations on the base of the tabulated data, Ü simple calculation models for specific type of structural members, Ü advanced calculation models able to deal with any kind of the structural model.
Fig. 1 Concept of Response Surface Method This method is based on the assumption that it is possible to define the dependency between the variable input and the output data through the approximation functions in the following form: (6) where co is the index of the constant member; ci are the indices of the linear member and cij the indices of the quadratic member, which are given for predetermined schemes for the optimal distribution of the variables or for using regression analysis after calculating the response [11].
Fig. 4 The stress-strain relationships The reduction factors for material properties depends on temperature load curve.
Histogram Mean Standard deviation Min. value Max. value Material Young’s modulus Ek mvar Lognormal 1,100 0,066 0,000 1,299 Stress yield fyk fvar Lognormal 1,100 0,066 0,000 1,299 Reduction factor ky kvar Lognormal 1,000 0,050 0,000 1,149 Load Permanent Gk gvar Normal 1,000 0,030 0,916 1,084 Variable Qk qvar Gama T.I 0,600 0,215 0,000 1,378 Fire-temperature Tk tvar Gama T.I 0,822 0,246 0,000 1,684 Model Model-uncertaint. xE evar Lognormal 1,000 0,050 0,000 1,149 Resistance-uncert. xR rvar Lognormal 1,000 0,050 0,000 1,149 In the probabilistic analysis there is the value of effect of actions E defined in accordance with the JCSS code [7] (EN 1991-1-1. 2002) follow and (8) where are the variable functions defined as the histograms.
Online since: May 2014
Authors: Xiao Yuan Wu, Qing Hua Pang, Yuer Chen
The existing productions are mostly limited on static analysis of indexes’ cross section data and lack consideration on dynamic development.
Based on the connotation and character of the compound system optimization of a basin initial water rights allocation [5,7,14], as well as the available research results of comprehensive evaluation index system of an initial water rights allocation scheme, we establish the index system of a basin initial water rights allocation scheme on the basis of the investigation and extensive collection of the basin data, and the basin research and interview work, and the suggestion by the river basin administrative agencies and experts in the field of the water environment and water resources, with methods of literature reading, frequency analysis, attribute reduction algorithm, and results reference.
Zhang, “The index system construction of province initial water rights allocation system based on the algorithm of attribute reduction”, Inter.
Online since: January 2013
Authors: Agus Haryono, Sri Budi Harmami, Dewi Sondari
This is because of their unique magnetic and electric properties as well as numerous applications in the fields of data storage, ferrofluids, nano-adsorbents, Magnetic Resonance Imaging, biomedicine, biosensor, bio-separation, etc. [2-11].
The particle size of 2 nm, which data was compared to Transmission Electron Microscopy Image (TEM), the aggregation state of the particles can be determined.
Cr(VI) reduction by Pseudomonas aeruginosa immobilized in a polyvinyl alcohol/sodium alginate matrix containing multi-walled carbon nanotubes.
Tang; Degradation of lead contaminated lignocellulosic waste by Phanerochaete chysosporium at th reduction of lead toxicity.
Online since: February 2008
Authors: Jie Zhou, Jurek Duczczyk, Gang Liu, K. Huang
Table 1 Dimensions and initial temperatures of the workpiece and extrusion tooling Billet length [mm] 812 Reduction ratio 19.6 Billet diameter [mm] 202 Billet temperature [°C] 450 Container insider diameter [mm] 203 Tooling temperature [°C] 400 Container outside diameter [mm] 360 (a) (b) Fig. 1 (a) Cross section of the rectangular hollow profile with the shaded area selected for FE simulation and (b) porthole die used to produce the profile.
The flow stress-strain data of the AA7020 alloy determined from hot compression tests at temperatures from 250 to 575 °C and strain rates from 0.01 to 100 s -1 and then corrected for deformational heating [4] were used as the input data of the workpiece material.
At this stage, the reduction ratio is quite low, only 2.25.
Online since: June 2008
Authors: Janez Grum, Michael R. Hill, Uros Trdan
The same trend of roughness reduction was noticed with specimen ´s3´ where, Ra 3=0.74 µm and Rz 3= 4.73 µm were obtained.
(b) Specimen ´s0 ´, 1. scan, after cutting -15 -10 -5 0 5 0 1000 2000 3000 4000 5000 6000 7000 8000 X axis (µm) Y axis (µm) Specimen ´s4´, 1. scan, after LSP -20 -10 0 10 20 0 1000 2000 3000 4000 5000 6000 7000 8000 X axis (µm) Y axis (µm) (a) pQ Psw ⋅≅ 02.1 (1) The optimum pressure Psw in LSP is determined by the Hugoniot Elastic Limit (HEL), which is calculated from dynamic yield strenght σy dyn and Poisson number ν, using the equation [7]: MPa MPa HEL dyn y 6.630 )66.01( 320)33.01( )21( )1( = − ⋅− = − ⋅− = ν σν (2) From the data above it can be inferred that the Hugoniot elastic limit with shock stresses is much higher than the yield strenght of the precipitation-hardened aluminium alloy (σy dyn =320 MPa).
On the basis of the data on strains with individual drilling increments the principal residual stresses were calculated
The excessive pulse power density resulted in a reduction of the maximum value of the compressive residual stress in the material although they were increasing with depth. 4.
Online since: June 2018
Authors: Attila Diószegi, Juan Carlos Hernando
Two type-S thermocouples are placed at the middle section of the specimen, providing thermal data of the solidification process and allowing the estimation of the thermal coherency temperature [18].
The modulus of primary austenite, Mγ, describes the reduction of surface area to volume ratio of the austenite phase.
This suggests that not only the distance between the centre of gravity of austenite particles is increasing (Dγ) as a direct result of the reduction of surface area to volume ratio, but also the space between the austenite particles (DIPhyd).
In the b), c) and d) figures, the circles represent the values from the current investigation, related to CGI material, while the triangles represent the literature data for a similar investigation performed in LGI [14].
Online since: May 2012
Authors: Shu Shun Liu, Sing Wei Liou, Wen Zheng Sun, Wei Tong Chen
Introduction Since 2000, Taiwan has continued to improve its efforts in workplace accident reduction, and workplace safety has reached a certain level.
Andi [8] concluded that good workers’ safety cognition build good safety culture, which initiates the reduction of construction accidents.
Data collected from the questionnaire was subjected to SPSS 17.0 statistical analysis.
Summary of the background of survey respondents Managers Laborers Position Sample size % Position Sample size % Worksite director 19 5.8 Steel worker 121 36.1 Industrial safety personnel 11 3.3 Formwork worker 103 30.7 Superintender 31 9.3 Scaffolding / concrete worker 22 6.6 Director of field operations 10 3.0 Misc. manual labor 11 3.3 Other management position 3 0.9 Other labor position 4 1.2 Data Analysis Reliability analysis Reliability refers to the consistency and stability of test results.
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