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Online since: October 2015
Authors: Kamariah Noor Ismail, Ku Halim Ku Hamid, Siti Aminah Md Ali
Temperature programmed reduction (TPR-H2) analysis was used to evaluate the reduction properties of the synthesized NiCo/SiO2 catalyst using Auto Chem II 2920 (Micromeritics).
The reaction data were collected at reduction condition of 350ºC, 1bar, total GHSV 30,000mL/gcat.h, H2/CO2=4:1.
This can be ascribed to the reduction of Co3O4 to CoO.
This peak was suggested to the reduction of CoO to Co and NiO to Ni [9,15].
This can be supported with the decreased in reduction temperature of α and β peaks.
Online since: October 2011
Authors: Yu Cheng, Hui Bin Liu, Lin Mu, Shi Ping Li
Abstract: Linear Discriminant Analysis (LDA) [1] is a well-known method for face recognition in feature extraction and dimension reduction.
LDA extracts features of the original data in a way which selects the most discriminable features between classes.
The main difference between the 2DLDA and LDA algorithm is the representation of data[4].
It has been demonstrated that the feature vectors produced by this method could classify better. 1 Preliminary Knowledge:2DLDA The goal of 2DLDA is to extract features that can well discriminate a set of data belonging to a number of classes.
This part is as same as that of 2DLDA, except . 3 Experimental result and analysis I test my method on ORL[7]face data pool.
Online since: June 2014
Authors: Chithra Parameswaran, Paramita Sarkar, C. Harish, M. Bhanu Chandra, A. Nirmala Grace
The FWHM gives precise information on the particles size distribution and are evaluated manually from the mid-value of recorded data.
Time (mins) 2 20 40 60 90 SPR Position (nm) 423 415 416 417 413 FWHM (nm) 97 81 80 79 76 Particle Radius(nm) 31 28 28.3 28.5 27.5 Table 2 Statistical data Figure 4 UV-Vis spectrum Statistical analysis The UV-Vis spectrum has a single peak at 420 nm showing the presence of spherical nanoparticles.
NaBH4, having very high reduction potential readily reduces the Ag+ ions to metallic silver giving silver nanoparticles.
Time(mins) 20 24 30 34 40 SPR Position (nm) 425 429 428 432 424 FWHM(nm) 130 148 140 164 155 Particle Radius (nm) 32 33.7 33 35 31.5 Table 3 Statistical data Figure 7.
The data given above were analysed by obtaining the graphs for FWHM and SPR Peak with Time and Particle Size.
Online since: October 2024
Authors: Lih Jiun Yu, Nai Yeen Gavin Lai, Ruey Shan Chen, Sia Yee Yang, Mouad A. Tarawneh
The findings of this study revealed that the immersion of natural rubber in d-limonene led to a significant reduction of tensile properties due to chain scission and bond breaking as well as cross-linking within the rubber.
Additionally, the samples exhibited noticeable dimensional changes with greater concentrations of d-limonene leading to more substantial swelling and ultimately causing a reduction in tensile strength.
The data obtained from the specimens were presented as part of this study's results as shown in Figures 1 and 3.
The data from the specimens are presented in Figure 2 and 4.
This can weaken the intermolecular forces and interactions within the rubber matrix, causing a reduction in tensile strength.
Online since: February 2012
Authors: Catalin Cioaca, Mircea Boscoianu
Collection of such data should be easy, given that the construction of databases is a direct consequence of the duties in those areas.
Using detection/assessment/warning/response/recovery data the vulnerabilities of the subsystem / infrastructure are calculated, for each scenario with allocated capacity, using the threat probability of the scenario and, subsequently, the new risk scores for each attack scenario.
Since the initial probability of a threat scenario is relative, and the reduction of it was made by implementing of technical solutions, this value is not necessarily the sum of the initial probabilities of attack.
We can suppose that the effectiveness of risk reduction can be measured as the sum of risk scores for each risk scenario on the system.
The next action is the allocation of a set of solutions for the system risk reduction.
Online since: June 2015
Authors: Pitchandi Kasivisvanathan, K. Palanikumar, S. Eabenrajkumar
Computer controlled data Acquisition system was used to collect and record data of the experiments.
Fig.5 Thrust force for Al/1% Mica Fig.6 Thrust force for Al/3% Mica 5.3 Effect of Wt % of Mica Reinforcement on Thrust force There was 22 % reduction in thrust force when the feed was 0.1 mm/rev for the cutting speed of 1000 rpm and 2000 rpm.
Whereas the thrust force reduction was around 13% when the feed was 0.1 mm/rev for the cutting speed of 3000 rpm.
As feed increases to 0.2 mm/rev and 0.3 mm/rev the reduction in thrust force was only around 3% to 5%.
For other feed, the reduction of thrust force was 3% to 5 % only. 3.
Online since: June 2014
Authors: Elson Longo, Margarete S. Silva, Gustavo F. Cavenago, Lucas L. da Silva, Mário Cilense, Guilhermina Ferreira Teixeira, Maria Aparecda Zaghete, Rafael Gomes Dias, Alberto A. Cavalheiro
The Curie temperature (Tc) is increased besides the slight reduction of dielectric constant (Kc).
Results and discussion The powder analysis by X-ray diffraction (XRD) (Fig. 1) shows the perovskite single structure phase formation according the JCPDS data bank.
This diffraction profile can be adjusted to the Rhombohedral (R3mR - card number #77585) and tetragonal (P4mm - card number #90699) structures, according the ICSD structure data bank.
However, the rhombohedral structure presents a coherent reduction.
The reduction of the weight loss seems to be associated to the barium (II) presence in the ceramic composition.
Online since: March 2011
Authors: Khaled Y. Benyounis, Abdul Ghani Olabi, Abed Alaswad
In this work, Response surface method was used based on data provided by Finite element modeling to construct a model for the bulge height as a function of geometrical factors for T-type bi-layered tube hydroforming.
Compared with conventional metal forming processes, tube hydroforming has the merits of a reduction in work piece cost, tool cost and product weight.
Figure 3: Experimental result Figure 4: Numerical result Figure 5: Experimental and numerical hydroformed branch profile Experimental Design Response Surface Method was applied using statistical software, Design-expert V7 [9], to the numerical data obtained based on the finite element model described in the last section.
Resultant bulge height and wall thickness reduction were modeled as functions of the geometrical factors listed in (Table. 2) with the mentioned experimental ranges.
(Fig. 6) shows the relationship between the actual and predicted values of bulge height and thickness reduction.
Online since: October 2011
Authors: Ying Xian Zhao, Lin Xiao
Fig. 3 presented the conversion data of NO catalytic oxidation with varying space time at 473 K.
Based on the experimental data in Figs. 1-5, we have tried to indentify the mechanisms and determine the kinetic parameters of NO oxidation over Pt/g-Al2O3 and La0.8Sr0.2MnO3, by fitting the data with Eqs.14, 15, 16 and 17, respectively.
The experimental data in Fig.3 (b) fit Eq. 21 well, estimating the values of the parameters, and to be 3.210, 8.724 and 3.680ⅹ10-1, respectively.
By inserting the data of and back into the Eq. 16, a plot of versus was drawn.
gives a straight line which also fits the experimental data well, confirming that the variation of O2 concentration also did not change the reaction mechanism.
Online since: August 2017
Authors: Nikolaos E. Karkalos, Angelos P. Markopoulos
Benefits include the reduction of costs connected to fluid acquisition and disposal, energy saving and reduction of environmental pollution and health hazards in industrial workplaces.
As depth of cut increases, the reduction of maximum temperatures is higher for increasing flow rate from 5 L/min to 15 L/min.
Generally, it was found that use of grinding fluid at the highest flow rate results in a minimum 100 K reduction in maximum temperature for 0.01 mm depth of cut and a maximum of about 200 K reduction for 0.05 mm depth of cut.
For depths of cut 0.01 and 0.03 mm, there is a significant reduction of maximum temperature between cases with 5 L/min and 10 L/min flow rate, of about 120-130 K, and a smaller reduction between cases with 10 L/min and 15 L/min flow rate.
Habrat, Analysis of mechanical characteristics of face milling process of ti6al4v alloy using experimental and simulation data, J Mach Eng 16(3) (2016) 58-66
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