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Online since: February 2020
Authors: Van Thuan Le, Hoang Sinh Le, Thi Kieu Ngan Tran, Thi Thanh Nhi Le, Dai Lam Tran, Quang Vinh Nguyen, Thanh Minh Pham
Adsorption kinetics and isotherms
To find the best kinetic model described the adsorption mechanism and the rate of Ni(II) adsorption on Fe3O4-NPs/AC, the experimental data obtained from the effect of contact time were fitted using the pseudo-first-order and pseudo-second-order kinetic models, which described as Equations (7) and (8), respectively.
The curves fitting experimental data using non-linear regression are presented in Figure 5b, and the isotherm constants of two models are given in Table 1.
The results obtained show that both isotherm models well fit experimental data with high correlation coefficients R2.
[24] Khenniche L and Aissani F, Preparation and characterization of carbons from coffee residue : Adsorption of salicylic acid on the prepared carbons, Journal of Chemical & Engineering Data, 55 (2010) 728-734. doi: 10.1021/je900426a
[31] Grana A, Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity, Pure and Applied Chemistry, 57 (1955) 603-619. doi: 10.1351/pac198557040603
The curves fitting experimental data using non-linear regression are presented in Figure 5b, and the isotherm constants of two models are given in Table 1.
The results obtained show that both isotherm models well fit experimental data with high correlation coefficients R2.
[24] Khenniche L and Aissani F, Preparation and characterization of carbons from coffee residue : Adsorption of salicylic acid on the prepared carbons, Journal of Chemical & Engineering Data, 55 (2010) 728-734. doi: 10.1021/je900426a
[31] Grana A, Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity, Pure and Applied Chemistry, 57 (1955) 603-619. doi: 10.1351/pac198557040603
Online since: November 2011
Authors: E.S. Zainudin, Reza Mehryari Lima, Z.N. Ismarrubie, S.H. Tang
With 75 percent of fuel consumption relating directly to vehicle weight, the automotive industry can expect an impressive 6 to 8 percent improvement in fuel usage with mere 10 percent reduction in vehicle weight.
This translates into reduction of around 20 kilogram of carbon dioxide per kilogram of weight reduction over vehicle’s lifetime [2].
An axial quasi static test is applied on a circular cross section of steel tube wrapped by glass fiber reinforced polyester (GFRP) by using three types of fiber orientations (±45°, ±75º and 90°) and by using different number of layers (4, 6, and 8 layers), in order to obtain optimum design data for the vehicle structural parts that has the most efficient energy absorption performance.
This translates into reduction of around 20 kilogram of carbon dioxide per kilogram of weight reduction over vehicle’s lifetime [2].
An axial quasi static test is applied on a circular cross section of steel tube wrapped by glass fiber reinforced polyester (GFRP) by using three types of fiber orientations (±45°, ±75º and 90°) and by using different number of layers (4, 6, and 8 layers), in order to obtain optimum design data for the vehicle structural parts that has the most efficient energy absorption performance.
Online since: September 2012
Authors: Luigi Sorrentino, Salvatore Iannace, Marco Aurilia, Marco D'Auria, Daniele Davino, Pasquale Mei, Ciro Visone
By means of this approach it is possible to enhance the structural behavior by combining different materials in specific directions (for weight reduction) and provide functional anisotropic (often orthotropic) mechanical properties.
The length of the aligned structures is dependent on the amount of particles and on the MF strength (data not shown for brevity).
A reduction of the stiffness was measured in oriented samples, while randomly filled samples did not show reactions [26].
The stiffness reduction was in inverse proportion with the applied strain.
The length of the aligned structures is dependent on the amount of particles and on the MF strength (data not shown for brevity).
A reduction of the stiffness was measured in oriented samples, while randomly filled samples did not show reactions [26].
The stiffness reduction was in inverse proportion with the applied strain.
Online since: September 2013
Authors: Ireneusz Dominik
Karnik and Mendel defined the type reduction required for finding a crisp value, which was described in the book [4].
Consequently to calculate the output of the type-2 fuzzy system only a simple type-reduction operation is needed (Fig. 2).
Results In order to provide the data for the rule base of the fuzzy control system the static characteristics of the actuator were created.
Sibielak: Mathematical Model of a Shape Memory Alloy Spring Intended for Vibration Reduction Systems.
Consequently to calculate the output of the type-2 fuzzy system only a simple type-reduction operation is needed (Fig. 2).
Results In order to provide the data for the rule base of the fuzzy control system the static characteristics of the actuator were created.
Sibielak: Mathematical Model of a Shape Memory Alloy Spring Intended for Vibration Reduction Systems.
Online since: April 2013
Authors: Dirk Hortig, Marion Merklein, Q. Braun
Failures unable to detect are necking in HX220BD one with 28.6% reduction of the 0.7mm sheet thickness, and the other with 36.4% of the 1.1mm.
In aluminium alloy EN AW 5128 the necking has a 41.2% thickness reduction of 1.7mm sheet.
As the sheet thickness increases, the non-detectable reduction of sheet thickness also increases.
Maldague in: Infrared image processing and data analysis, volume 46 of Infrared Physics&Technology, ELSEVIER (2004)
In aluminium alloy EN AW 5128 the necking has a 41.2% thickness reduction of 1.7mm sheet.
As the sheet thickness increases, the non-detectable reduction of sheet thickness also increases.
Maldague in: Infrared image processing and data analysis, volume 46 of Infrared Physics&Technology, ELSEVIER (2004)
Online since: April 2013
Authors: Secil Ozer Colpan, Mahmut Yavuz
Level
Land
Installation
Transportation
Tax reduction
Raw material
Manpower
Technology
Climate
Water supply
Close to market
New markets
Waste water
Waste marble
Visual pollution
Local regulations
A-Eskisehir
B-Bozuyuk
C-Afyon
D-Denizli
Criteria
2.
Land Installation Transportation Tax W λmax CR Land 1 2 1/5 1/3 0.112 4.097 0.036 Installation 1/2 1 1/9 1/2 0.075 4.190 0.070 Transportation 5 9 1 2 0.569 4.028 0.011 Tax reduction 3 2 1/2 1 0.243 4.168 0.062 Mean 4.121 0.045 Table 5.
Alternatives Sub-criteria of economic main criterion Main Criterion Priorities Total Priorities Land Installation Transportation Tax reduction A-Eskisehir 0.079 0.184 0.088 0.070 0.112 0.090 B-Bozuyuk 0.515 0.450 0.157 0.519 0.075 0.307 C-Afyon 0.188 0.313 0.272 0.323 0.569 0.278 D-Denizli 0.217 0.053 0.483 0.088 0.243 0.325 The overall rating for each alternative is calculated by summing the product of the relative priority of each criterion and the alternatives considering the corresponding main criteria.
For selection of plant location, the proposed AHP model is unique in its identification of multiple attributes, minimal data requirement and minimal time consumption.
Land Installation Transportation Tax W λmax CR Land 1 2 1/5 1/3 0.112 4.097 0.036 Installation 1/2 1 1/9 1/2 0.075 4.190 0.070 Transportation 5 9 1 2 0.569 4.028 0.011 Tax reduction 3 2 1/2 1 0.243 4.168 0.062 Mean 4.121 0.045 Table 5.
Alternatives Sub-criteria of economic main criterion Main Criterion Priorities Total Priorities Land Installation Transportation Tax reduction A-Eskisehir 0.079 0.184 0.088 0.070 0.112 0.090 B-Bozuyuk 0.515 0.450 0.157 0.519 0.075 0.307 C-Afyon 0.188 0.313 0.272 0.323 0.569 0.278 D-Denizli 0.217 0.053 0.483 0.088 0.243 0.325 The overall rating for each alternative is calculated by summing the product of the relative priority of each criterion and the alternatives considering the corresponding main criteria.
For selection of plant location, the proposed AHP model is unique in its identification of multiple attributes, minimal data requirement and minimal time consumption.
Online since: April 2008
Authors: Shao Xiong Shen, Animesh Jha
Based on DTA measurement in glass transition range Tg and Tg', the beginning and ending
temperatures of glass transition, the viscosity can be simulated from DTA data from C.
With increasing alkali, the decrease of intensities of peaks A, B and C is a direct indication of an overall reduction in the number of corner-shared structural units: TBP-TP-TBP, polyhedtaTBP-TP and their combinations.
The observed frequency shift to higher energy with a corresponding reduction in the number of density of vibrational states under peak A is a direct measure of the reduction in the overall connectivity of structural units, which further supports the evidence for the preponderance of TeO3+δ and TeO3 structures with the increasing concentrations of alkali ions.
With increasing alkali, the decrease of intensities of peaks A, B and C is a direct indication of an overall reduction in the number of corner-shared structural units: TBP-TP-TBP, polyhedtaTBP-TP and their combinations.
The observed frequency shift to higher energy with a corresponding reduction in the number of density of vibrational states under peak A is a direct measure of the reduction in the overall connectivity of structural units, which further supports the evidence for the preponderance of TeO3+δ and TeO3 structures with the increasing concentrations of alkali ions.
Online since: February 2004
Authors: Jun Wang
However, jet impact angle does not significantly affect the smooth depth of cut,
but results in a marked improvement (up to 50% reduction) in the surface roughness when it is
increased from 50° to 70°.
Analyzing the experimental data has revealed that nozzle oscillation could in fact increase or decrease the cutting performance such as total depth and smooth depth of cut.
In the worst cases, improper use of nozzle oscillation has resulted in about 37% reduction in the smooth depth of cut.
This adverse effect was also noticed on the total depth of cut, up to 7% reduction for the small number of cases that the experiment could produce for comparison.
Analyzing the experimental data has revealed that nozzle oscillation could in fact increase or decrease the cutting performance such as total depth and smooth depth of cut.
In the worst cases, improper use of nozzle oscillation has resulted in about 37% reduction in the smooth depth of cut.
This adverse effect was also noticed on the total depth of cut, up to 7% reduction for the small number of cases that the experiment could produce for comparison.
Online since: August 2019
Authors: Peter Jurči, Aneta Bartkowska
Tempering induces the precipitation of carbides from the supersaturated solid solutions (transition and/or stable carbides), and reduction of micro-stresses in the martensite matrix and thereby prevent cracking.
It may also cause factory shutdowns, as a result damage of products, reduction in effciency, additional maintenance which exposes the industrial to additional costs.
Based on the G 102-89(2015)e1 standard and by using the output data from the abovementioned measurements the corrosion rate was calculated.
This situation may would suggest that improved corrosion resistance of SZT steel compared to CHT one appears counterintuitive with regard to reduction of retained austenite.
It may also cause factory shutdowns, as a result damage of products, reduction in effciency, additional maintenance which exposes the industrial to additional costs.
Based on the G 102-89(2015)e1 standard and by using the output data from the abovementioned measurements the corrosion rate was calculated.
This situation may would suggest that improved corrosion resistance of SZT steel compared to CHT one appears counterintuitive with regard to reduction of retained austenite.