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Online since: July 2012
Authors: V. Teixeira, J.O. Carneiro, S. Azevedo, F. Fernandes, J. Neves
Methylene Blue dye is a heterocyclic aromatic chemical compound which has been widely used for photodegradation studies since it is an oxidation-reduction indicator.
From the transmission data it is possible to obtain the decrease in the solution concentration as a function of UV irradiation time.
From the experimental data in Fig. 7, it is observed that the coated NP-G sample shows the highest photoactivity; this sample, presents the highest photodegradation rate constant (~ ).
The analysis of the transmittance data also allows us to obtain the photocatalytic efficiency (h %) according with the following equation: (5) where T is the solution transmittance at t = 240 min and the subscript 0 is related to time zero (t = 0).
Wettability (self-cleaning) properties Surface wettability was evaluated via contact angle measurements in a dynamic mode using Young La Place method (Contact Angle System S.A data physics) with 5µl/s of distilled water droplets.
Online since: August 2013
Authors: Ming Ju Lee, Ming Gin Lee, Mang Tia, Jing Yu Chen
Figure 2 provides the results of flexural strength reduction ratio of four concretes after 600 cycles of freeze-thaw testing.
Compressive strength reduction ratio of four concretes after freeze-thaw test Figure 2.
Flexural strength reduction ratio of four concretes after freeze-thaw test Water Absorption.
The experimental data and curves are displayed in Table 6 and Figure 3.
Air Permeability reduction ratio of three concretes before and after freeze-thaw test Figure 5.
Online since: April 2012
Authors: Franz Roters, Dierk Raabe, Nicola Peranio
The EBSD data showed many similarities with the material that was conductively annealed at 920°C: (i) The through-thickness texture inhomogeneity was clearly reduced, Fig. 3.
Cold rolling yielded a reduction of ferrite and pearlite band widths and a more pancake-type morphology of pro-eutectoid ferrite grains.
Recovery was observed in terms to a slight reduction of hardness at the beginning of annealing at ferritic temperatures, Fig. 5.
(a) It is well known, that a reduction of dislocation density and thereby a reduction of strain energy within the ferrite grains is the most important driving force for both processes, recovery and recrystallization.
Also at low intercritical annealing temperatures, the results indicated an interdependence of recrystallization and phase transformation, a reduction of strain energy being a common driving force.
Online since: September 2018
Authors: Oluwole Daniel Makinde, G. Sarojamma, Sreelakshmi K
The data in Table 1 shows that the present results are in very good agreement.
This leads to a reduction in the buoyancy force, which decelerates the flow.
Which results a reduction in the buoyancy force leading to a deceleration in the fluid flow.
It is clear from Fig. 11 that the nanoparticle concentration shows a reduction with increase in ε2.
Ø Suppression in velocity due to Maxwell and Forchheimer parameters caused a reduction in surface drag coefficient.
Online since: April 2023
Authors: Marcel Rose M. Mabida, Mervin L. Mamza, Kenneth John G. Solis, Showna Lee T. Sales
Plastic wastes have been found to improve some mechanical properties of concrete, particularly ductility, flexural strength, and shrinkage strain reductions [4].
This decrease in compressive strength is because of the reduction in bond strength between the cement paste and the plastic's surface, as plastic is naturally hydrophobic [5,17].
A 6.76% strength reduction from the reference block was observed at 20% PP plastic waste replacement.
There is no extensive discussion on the underlying cause of strength reduction at 20%, hence, an opportunity for in-depth investigation in future studies.
The scatter plot in Figure 2d shows an upline trend of data which indicates that as the percentage of plastic in the blocks increases, the density increases as well.
Online since: February 2012
Authors: Chang Yong Sun, Chang Jiang Yu, Yun Jun Liu, Ying Bing Song, Chao Xian Wang, Yong Xiu Li
The process yielded a wrinkled sheet structure resulting from reaction sites involved in oxidationand reduction processes.
And the data revealed that GOconsisted of amorphous and crystalline phases and some carbon atoms had sp3-orbitalsand others had sp2-orbitals.
Electrocatalysis.Kou et al[19] prepared founctionalizedgraphene sheets by thermal expansion of graphite oxide and researched electrocatalysis of oxygen reduction using Pt nanoparticles supported on it.
In this method, the atomic percent of nitrogenin graphene layers can be adjusted up to 10.1% asestimated from the XPS analysis.Electrochemical characterizations demonstratedthat the NGs exhibited excellent electrocatalytic activitiestoward the oxygen reduction reaction in alkaline electrolytes, similar to what wasobserved in nitrogen-doped vertically aligned carbonnanotubes.
They used the graphene-metal nanohybrids as catalysts in the reduction of potassium hexacyanoferrate(III) with NaBH4 in aqueous solution, and showed us that graphenewas a superior substrate to support metals for applications in the heterogeneous catalysis.
Online since: July 2007
Authors: Jussi A. Karjalainen, Martti Juuso, Kari Mäntyjärvi
Punching force reduction with wave-formed tools Jussi A.
A special electro-hydraulic test machine with computerized data logging was applied in ascertaining the displacement-force curves and maximum punching force.
Online since: February 2010
Authors: Sandip Ghosh Chowdhury, Jay Chakraborty, Kishor Kumar, R. Ranjan, S.R. Singh
Diffraction stress analysis (by d-sin2 ψ method) indicates that fcc to hcp phase transformation is also accompanied by the reduction of compressive stress in the hcp Ti phase with increasing film thickness.
From equation (1) it can be seen that the stress ( ΙΙσ ) can be calculated from the slope of the straight line fitted to the data obtained by plotting hkildψ versus sin 2 Ψ.
(c) reported in bulk titanium powders during mechanical alloying [13, 14] where the observed lattice parameters are very similar (but not same) to that observed in the present work of Ti films although particle size reduction below certain critical value and associated change in surface energies were attributed to the main reason of such transformation in bulk.
A general observation was the reduction of compressive stress in the films with increasing film deposition time (or thickness) although in some cases a little deviation was observed for 15 min. film deposition (~ 432 nm film thickness).
Therefore, reduction of compressive film stress was caused by film microstructure (thickness) and the resulting strain energy difference between the two phases and its minimization might have driven the fcc to hcp phase transformation.
Online since: December 2010
Authors: Jun Ma, Cai Qi Zhao, De Lin Li
This paper researches the stochastic distribution feature and statistical parameter of geometrical imperfections for the data sources of above position deviation of joints by “abnormal data test method”.
By this contrast method, the above observation data can be taken as the important data source for studying the distribution feature and statistical parameter of geometrical imperfections for latticed shell structure.
The abnormal data eliminating method of t test rule will be mainly introduced as follows.
To study the stochastic distribution rule of joint position deviation for latticed shell structure, it needs a certain amount of raw data.
In particular, the sample average value of critical load Pμincreases more quickly according to the reduction of Cd. 4.
Online since: December 2013
Authors: Yu Bin Zhang, Huo Mei Zhu, Mei Zhen Zhu
Among them, the 3 d data measurement, data processing, surface reconstruction is the three key technologies of reverse engineering.
Figure 1 Flow chart of reverse engineering Data processing Accurate, rapid and comprehensive access to real 3 d geometry data, is the foundation of the realization of reverse engineering.
Considering the CAXA point cloud can directly read text format files, and software such as Pro/E, UG read point cloud data, also because of huge data, due to certain difficulties.
Data processing options in CopyCAD , because of CopyCAD read similar like point cloud data, the system work speed faster, point, line fitting easily.
Mouse model of point cloud data is shown in figure 2.
Showing 17531 to 17540 of 40367 items