Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: August 2013
Authors: Hai Feng Sang, Chao Xu, Dan Yang Wu, Jing Huang
Secondly, compare the facial feature with the data base, to identify the face identity.
In this paper the Fisherface method in the literature 16 is adopted, this method is two times of projection transformation of the original sample data, the principal component analysis, projection, and then in the transform projection subspace in a discriminant analysis, projection, and build a face recognition system based on Fisher linear PCA transform discriminant.
Small image library of 50 people is builded up. 2) Face feature extraction method of training: method of extracted features of face images using 2D-Gabor filtering is adopted, and the extracted characteristics will be carried out by Fisherface method for dimensionality reduction.
For 200 pictures of 50 people participated in the training, we get the characteristic dimension 5440, 2 dimension after dimension reduction.
Training completed, time-consuming 2.334354s. 3) Face tracking and recognition: multi images is registered as prototype, feature of these images after dimensionality reduction is saved.
Online since: December 2011
Authors: Li Wei Duan, Yun Li Feng, Xue Jing Qi
According to the Mechanical technical parameters of Gleeble-3500 thermomechanical simulator, combined with the parameters in actual scene, the following simulation programme is developed: (1) The proof sample is heated to 1150˚C with the rate 10˚C/s, then waiting for 3 minutes; Cooled to 1000˚C with the rate 8˚C/s, deformation 40% (reduction 6 mm), deformation rate 5 s-1, Then cooled to 900˚C with the rate 5˚C/s, deformation 30% (reduction 2.7mm), deformation rate of 50s-1.
(3) The proof sample is heated to 1150˚C with the rate 15˚C/s, then waiting for 3min; Cooled it to 1000˚C with the rate 8˚C/s, deformation 40% (reduction 6 mm), deformation rate 5 s-1; Then cooled to 900˚C with the rate 5˚C/s, deformation 30% (reduction 2.7mm), deformation rate of 50 s-1.
Results and Disscution Experimental Data and Analysis on Dynamic CCT Curve.
The data on temperature-expansion recorded by Gleeble-3500 thermal simulation mill is disposed with the software Origin in this chapter, phase transition points and dynamic CCT curve of low carbon-manganese steel.continuous cooling transformation are taken respectively on Table.2 and Figure. 1.
Online since: January 2020
Authors: S.A. Layhan, A.A. Veselovsky
The effect of holding time on the composition of the obtained magnetic concentrate and ferronickel Chemical composition and yield of ferronickel obtained from smelting of magnetic concentrate Chemical composition and yield of magnetic concentrate Yield [%] Chemical composition of ferronickel [mass %] Holding time, hours Concentrates after separation Magnetic [mass %] Non-magnetic, [mass %] Cr Ni S Si Co Fe 34 0.8 9.2 3.0 3.0 0.8 ost 1 15 85 28 1.0 6.1 1.7 4.3 0.7 ost 2 69 31 27 1.1 6.2 1.8 3.4 0.9 ost 4 64 36 32 1.9 6.2 4.5 6.0 0.8 ost 6 54 46 34 1.2 7.0 4.2 3.0 0.7 ost 8 62 38 Analyzing the data from Table 2, it can be concluded that the degree of extraction of the waste nickel into magnetic concentrate is 80-85%, whereas during subsequent smelting nickel almost completely transferred into the melt (Table 4).
According to the data from the table, the slag is represented by gangue material purified from iron and nickel in the form of a dark-colored glassy phase.
Grieveson, Carbothermic reduction of chalcopyrite in presence of lime, Proc.Symp.TMSAnnu.
Jha, Thermodynamic considerations for the extraction of Ni and Co metals from sulphide and oxide minerals by reduction technique, Proc.in Honor D.E.
Fedichkin, Research of process of depletion of converter slag of nickel manufacture by reduction-sulphiding complexes containing aluminum, Thesis of the candidate of technical sciences, Ekaterinburg, 2005
Online since: July 2011
Authors: Zhi Peng Xie, Feng Jiao Xiong, De Bi Zhou
This study demonstrated that, as the SSA was added into the Ce3+/Ce4+ electrolyte, an increase in peak current was observed for the oxidation and reduction, when a cyclic voltammogram was taken on a platinum electrode; at the same time, a decrease in peak potential difference was also observed.
However, the distinct anodic peak could not be observed for the oxidation of SSA at this potential range; furthermore, the voltammetry of SSA lacks the return peak for the reduction of oxidized SSA between 1.2 and 1.4 V vs.
So it can be concluded that the increase in peak current for the oxidation and reduction of Ce3+/Ce4+ redox couple in the presence of SSA is not caused by the oxidation and reduction of SSA.
Table 1: Cathodic and anodic peak current and peak potential obtained from Fig. 1 Additive Peak current [mA] Ipc/Ipa Peak potential [mV] Anodic Ipa Cathodic Ipc Anodic Cathodic Separation No 1.742 1.403 0.81 1363 1240 123 SSA 2.300 2.037 0.89 1337 1240 97 Some data obtained from Fig. 1 are summarized in Table 1.
The comparison of our value in sulfuric acid media with literature data is good.
Online since: October 2025
Authors: Oleksii Bashynskyi
The mechanical analysis is performed to determine the stress-strain state of the structure, taking into account the reduction in the stiffness and strength characteristics of the section and structural materials due to the elevated temperature.
The obtained data from the temperature analysis are used to modify the mechanical parameters, which makes it possible to assess the behaviour of the structure in fire conditions and determine its ability to withstand the specified loads during the design period [1, 2, 3].
According to this average temperature, each section will be assigned its own reduction factor of the elastic modulus.
The average temperature and, accordingly, the coefficient of elastic modulus reduction for each section: 1.
Comparison of the numerical results of the study and the data of the full-scale experiment gave a high coincidence (3%).
Online since: January 2023
Authors: Mohd Zaidi Jaafar, Muhammad Shafiq Mat Shayuti, Nur Amelina Bohairah, Tengku Amran Tengku Mohd, Munawar Zaman Shahruddin, Nik Khairul Irfan Nik Ab Lah
From the surface tension data obtained, a surface tension profile was constructed as a function of surfactant concentration.
A series of reduction could be seen from the figure as the pH solution increased.
HPAM is an anionic polymer, thus the negative charges of the polymer could favour the reduction of surfactant adsorption.
As the pH increased, more hydroxyl ion present, resulting in the reduction of the number of hydroxyl group on the surface charge.
Anionic surfactant exhibits higher adsorption in the presence of divalent ions due to reduction in the charge interactions [27].
Online since: June 2010
Authors: Sebastian Koziołek, Damian Derlukiewicz, M. Ptak
Opinions exist that Lean Six Sigma should be implemented in the large number of areas of the life, and its effects (essential improvement in financial results through the reduction of poor quality costs) are hard to overrate.
The cost reduction of poor quality in the 7th, 14th and 24th month (Fig. 1) is not relatively higher than the waste discovered almost in the whole range of the testing period.
Data collection based on assumed control limits used for quality assessment come from control charts designed for monitoring of process quality according to Statistic Process Control [6].
CTQ data, the technical and financial condition of a product development are used as the input to application of Theory of Inventive Problem Solving (TRIZ) [9].
Online since: June 2020
Authors: Václav Nežerka, Petr Bily, Josef Fladr, Vladimír Hrbek
Separation of these material levels overcame heterogeneous complexity of composites, thus preventing duplicity of obtained data from different phases with close mechanical and/or structural features (such as aggregate and clinker etc.).
Micromechanical data were obtained using displacement driven grid indentation (Ti 700 series, Hysitron Inc.).
With respect to the sample microstructure, micromechanical features of individual phases present in each composite were derived from indentation data by spectral deconvolution.
The data were processed with respect to deconvoluted results (see Table 2) to derive average thickness of ITZ and other measured phases, as depicted in Fig. 1.
The study also showed that silica fume is the most efficient SCM for the reduction of thickness of ITZ in HSC.
Online since: March 2018
Authors: Wiendartun Wiendartun, Dani Gustaman Syarif, Andhy Setiawan, Dadi Rusdiana, Jaenudin Kamal
From the electrical characteristics data, it was known that the heat treatment could change the electrical characteristics of the Fe2TiO5 based-thermistor.
In order to carry out the reduction reaction as shown in equation 4, the thermal energy received by Fe2TiO5 material from the heat treatment process was used
The increase in the heat received can lead to an increase in the speed of the reduction reaction and increasing the amount of oxygen idle.
Furthermore, the heat treatment provided is a reduction process and the occurrence of oxygen vacuum flaws / the formation of Fe2+ ions in the ceramics become the source of free electron source for the conduction band.
For example NTC at the time reduction of 25 minutes at a temperature of 300 °C, has a room temperature resistance value (RRT) is 465 KΩ and the B value of 3459 K, respectively.
Online since: October 2020
Authors: V.L.R. Salvador, M. A. Scapin, S.G. de Araújo, L. Landini, A.B. Urbaninho, B.F. Massanares
Data were collected in order to be compared with other methodologies, already used in the literature.
According to the Ministry of Mines and Energy (MME), this measure allows the reduction of imports of the diesel oil, adding value in the agribusiness of the biodiesel, in direct relation with other agro-industries (grains, oilseeds and meats) and inducing the improvement of agribusiness exports (processed products, instead of in natura) [9].
In this context, here, the proposal was to study the viability of biodiesel production, using alternative methodologies, such as the reuse of materials and reduction of the processing time.
In the latter case, in our laboratory, microwaves have been widely applied as an economically more feasible technological resource, due to their main advantage, that is the reduction of time and processing temperature.
The proposed methodology may contribute to the reduction of basic sanitation costs.
Showing 7871 to 7880 of 40331 items