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Online since: September 2011
Authors: Shu Fang, Bin Hu, Sheng Peng Liu
The vibration acceleration signal has been collected using the IEPE sensor and data acquisition card, experimental results verified the accuracy of the vibration model, and weak impact signal caused by the belt relaxation was distinguished, that testify the practicability of the CWT method in belt relaxation feature recognition.
Experimental Platform An experimental platform using IEPE acceleration sensor and data acquisition card has been established.
As is shown in Fig.1 and Fig.2, the experimental platform composed of robot and IEPE acceleration sensors and data acquisition card and computer, acceleration sensors are tied to the engine or other measuring points, data acquisition card collects the sensors signals and communicates with computer by USB.
[6] Maj J B, Royackers L, Moonen M.SVD-based optimal filtering for noise reduction in dual microphone hearing aids; a real time implementation and perceptual evaluation[J].IEEE Transactions on Biomedical Enginee-ring,2005,52(9):1563-1573
Experimental Platform An experimental platform using IEPE acceleration sensor and data acquisition card has been established.
As is shown in Fig.1 and Fig.2, the experimental platform composed of robot and IEPE acceleration sensors and data acquisition card and computer, acceleration sensors are tied to the engine or other measuring points, data acquisition card collects the sensors signals and communicates with computer by USB.
[6] Maj J B, Royackers L, Moonen M.SVD-based optimal filtering for noise reduction in dual microphone hearing aids; a real time implementation and perceptual evaluation[J].IEEE Transactions on Biomedical Enginee-ring,2005,52(9):1563-1573
Online since: May 2012
Authors: Rajesh J. Tayade, Manoj A. Lazar, H. C. Bajaj, R. V. Jasra
Literature contains a large amount of data on IR-spectral regions of deformation vibrations of adsorbed water molecules (~ 1620 cm-1) and was observed in all catalysts at 1622-1630 cm-1 range [29].
PNA showed 77-89 % decrease in concentration, measured from the UV-Vis absorbance data and indicated in the text as degradation, and it was 83-92 % for DNBA with different samples of TiO2 catalysts after 4 hours of UV light exposure.
Catalyst p- nitroaniline m- dinitrobenzoic acid A B C D A B C D P25 77 5.0 1.3 70 83 3.6 1.3 79 SG 89 5.7 1.4 59 87 2.8 1.2 77 SC 79 4.6 1.2 44 92 2.3 1.1 71 NC 30 - - 00 05 - - 00 A: Percentage degradation, after 4 hours of UV light irradiation, determined by UV-Vis spectrophotometer B: Initial Rate of degradation calculated using UV-visible absorbance data ( ×106 mol min-1) C: Rate Constant calculated using UV-visible absorbance data (k×102min-1) D: Percentage TOC removal after 4 hours of UV light irradiation (Initial TOC values for PNA= 26 mg/ L, DNBA= 24 mg/ L, ) NC: No catalysts (blank run) The initial rate and rate constant from UV-vis analysis data for the degradation of PNA and DNBA were determined as pseudo first-order reaction kinetics and are given in Table 1.
Here PNA showed 44-70 % reduction in TOC and it was71-79 % for DNBA, by using different TiO2 samples after 4 hours of UV light incidence.
Siemieniewska, Reporting Physisorption Data For Gas/Solid Systems with Special Reference to the Determination of Surface Area and Porosity, Pure Appl.
PNA showed 77-89 % decrease in concentration, measured from the UV-Vis absorbance data and indicated in the text as degradation, and it was 83-92 % for DNBA with different samples of TiO2 catalysts after 4 hours of UV light exposure.
Catalyst p- nitroaniline m- dinitrobenzoic acid A B C D A B C D P25 77 5.0 1.3 70 83 3.6 1.3 79 SG 89 5.7 1.4 59 87 2.8 1.2 77 SC 79 4.6 1.2 44 92 2.3 1.1 71 NC 30 - - 00 05 - - 00 A: Percentage degradation, after 4 hours of UV light irradiation, determined by UV-Vis spectrophotometer B: Initial Rate of degradation calculated using UV-visible absorbance data ( ×106 mol min-1) C: Rate Constant calculated using UV-visible absorbance data (k×102min-1) D: Percentage TOC removal after 4 hours of UV light irradiation (Initial TOC values for PNA= 26 mg/ L, DNBA= 24 mg/ L, ) NC: No catalysts (blank run) The initial rate and rate constant from UV-vis analysis data for the degradation of PNA and DNBA were determined as pseudo first-order reaction kinetics and are given in Table 1.
Here PNA showed 44-70 % reduction in TOC and it was71-79 % for DNBA, by using different TiO2 samples after 4 hours of UV light incidence.
Siemieniewska, Reporting Physisorption Data For Gas/Solid Systems with Special Reference to the Determination of Surface Area and Porosity, Pure Appl.
Online since: July 2014
Authors: Ping Sun
Based on the premise of an existing condition data, using factor analysis methods to build a cultural industry competitiveness evaluation index system and evaluation model, the corresponding indicators in the model will be evaluated at the final evaluation results.
When the factor analysis model is established, an important role is the application of factors analysis model to evaluate each sample position in the model as a whole, that a comprehensive evaluation. 4.Evaluate consequence analysis This paper empirical analysis of Beijing, Shanghai, Tianjin, Nanjing, Dalian and other, all quantitative indicators from the 2011 Statistical Yearbook and the Government Statistical Web site exposed data, qualitative indicators for listening to the views of relevant experts, in accordance with the Delphi technique eventually formed.
(1) In the SPSS software runs on data, came to the correlation matrix.
(2)Maximum orthogonal rotation method has been used variance factor rotation, after orthogonal rotation, the Comparability of indicators variables (common) did not change, but the common variance contribution factor is no longer the same as original, marked reduction in contribution of factor 1 and factor 2 contributions increased significantly.
Further, we can also through the analysis of time series data to study areas where credit conditions change over time.
When the factor analysis model is established, an important role is the application of factors analysis model to evaluate each sample position in the model as a whole, that a comprehensive evaluation. 4.Evaluate consequence analysis This paper empirical analysis of Beijing, Shanghai, Tianjin, Nanjing, Dalian and other, all quantitative indicators from the 2011 Statistical Yearbook and the Government Statistical Web site exposed data, qualitative indicators for listening to the views of relevant experts, in accordance with the Delphi technique eventually formed.
(1) In the SPSS software runs on data, came to the correlation matrix.
(2)Maximum orthogonal rotation method has been used variance factor rotation, after orthogonal rotation, the Comparability of indicators variables (common) did not change, but the common variance contribution factor is no longer the same as original, marked reduction in contribution of factor 1 and factor 2 contributions increased significantly.
Further, we can also through the analysis of time series data to study areas where credit conditions change over time.
Online since: September 2017
Authors: Luc Courard, Willy Hermann Juimo Tchamdjou, Sophie Grigoletto, Frédéric Michel, Toufik Cherradi, Moulay Larbi Abidi
Its main mineralogical, chemical and physical features are summarized in Table 1 (data made available by the producer company) [20].
Data analysis methods.
The data obtained for the compressive strength and flexural strength of blended mortars (0, 15, 25 and 35% of NPs) after 28 and 90 curing days are given in Fig.8a and Fig.8b.
Table 8 presents the constants (a, b, c and d) with regression coefficients (R2) of the correlation between the experimental data and the equation (Eq.2, Eq.3 and Eq.4 respectively).
The equation of water absorption by capillarity vs time (Eq.1) was found to provide a very good fit to the data with correlation coefficients of over 0.99 (Fig.11a).
Data analysis methods.
The data obtained for the compressive strength and flexural strength of blended mortars (0, 15, 25 and 35% of NPs) after 28 and 90 curing days are given in Fig.8a and Fig.8b.
Table 8 presents the constants (a, b, c and d) with regression coefficients (R2) of the correlation between the experimental data and the equation (Eq.2, Eq.3 and Eq.4 respectively).
The equation of water absorption by capillarity vs time (Eq.1) was found to provide a very good fit to the data with correlation coefficients of over 0.99 (Fig.11a).
Online since: November 2013
Authors: K. Palanikumar, K. Shanmugam, N.V. Amudarasan
The values obtained for ultimate tensile strength, yield strength and percentage of elongation for the welded joints are compared to the data obtained.
Also the percentage of elongation is higher in GTADSS when compared to GTAFSS joint, due to the presence of lesser percentage of chromium and nickel content led to the reduction in strength in GTAFSS, however, in GTADSS joint due to the presence of balanced percentage of chromium, nickel and molybdenum content led to the higher strength.
This indicates that there is a 40% reduction in the toughness value.
This indicates that there is a 32% higher in the toughness value compared to GTAFSS joints and 12% reduction when compared to base metal.
Also the percentage of elongation is higher in GTADSS when compared to GTAFSS joint, due to the presence of lesser percentage of chromium and nickel content led to the reduction in strength in GTAFSS, however, in GTADSS joint due to the presence of balanced percentage of chromium, nickel and molybdenum content led to the higher strength.
This indicates that there is a 40% reduction in the toughness value.
This indicates that there is a 32% higher in the toughness value compared to GTAFSS joints and 12% reduction when compared to base metal.
Online since: October 2011
Authors: Denis P. Dowling, J.N. Barry
Data was taken at a magnification of x2000 over 5 random points on each coating.
The significant reduction in spherical deposits could therefore be attributed to the lower surface area of the CoBlast coatings.
No change in Ca/P ratio was observed in the CoBlast HA coatings, with immersion in the SBF solution and the XRD data indicated no increase in crystallinity after 28 days immersion for these coatings.
The next stage gave rise to a reduction in the roughness of the HA coatings, with little or no change in the coating thickness (based on EDX analysis).
In order to obtain more quantitative data on recrystallisation mechanisms, comparisons of coatings with similar thickness and morphology would be required.
The significant reduction in spherical deposits could therefore be attributed to the lower surface area of the CoBlast coatings.
No change in Ca/P ratio was observed in the CoBlast HA coatings, with immersion in the SBF solution and the XRD data indicated no increase in crystallinity after 28 days immersion for these coatings.
The next stage gave rise to a reduction in the roughness of the HA coatings, with little or no change in the coating thickness (based on EDX analysis).
In order to obtain more quantitative data on recrystallisation mechanisms, comparisons of coatings with similar thickness and morphology would be required.
Online since: August 2023
Authors: Nataliia Kosenko, Valentyna Iurchenko, Oksana Melnikova, Yuliia Levashova
Up to 90 % of hydrogen sulfide found in the water and gas-air environment of biosphere objects was formed microbiologically as a result of bacterial sulfate reduction (reduction of sulfur-containing compounds, mainly sulfates) [1, 3].
Using potentiometric equipment, the oxidation-reduction potential of pore moisture (Eh) on the wetted surface of concrete and the pH of concrete were determined.
Identification of mineral phases was carried out according to standard tabular data.
As can be seen from the presented data, all concrete samples were subjected to acid aggression: the pH of the concrete samples of the above-water part of the water management facilities was significantly lower than the pH of the control sample.
The content of sulfate-containing minerals in the tested concrete samples (according to X-ray phase analysis data) – gypsum dihydrate; – anhydrous sulfosilicate: 1 – sewer collector, 2 – primary sump, 3 – oil trap , 4 – control It can be noted that the concentration of sulfate-containing minerals is the highest in the first sample (the most affected by corrosion).
Using potentiometric equipment, the oxidation-reduction potential of pore moisture (Eh) on the wetted surface of concrete and the pH of concrete were determined.
Identification of mineral phases was carried out according to standard tabular data.
As can be seen from the presented data, all concrete samples were subjected to acid aggression: the pH of the concrete samples of the above-water part of the water management facilities was significantly lower than the pH of the control sample.
The content of sulfate-containing minerals in the tested concrete samples (according to X-ray phase analysis data) – gypsum dihydrate; – anhydrous sulfosilicate: 1 – sewer collector, 2 – primary sump, 3 – oil trap , 4 – control It can be noted that the concentration of sulfate-containing minerals is the highest in the first sample (the most affected by corrosion).
Online since: March 2023
Authors: Sergey Yu. Belyaev, Ivan A. Surkov, Evgeny Yu. Raskatov, Marina Yu. Bulganina, Artem A. Fedulov
However, there is no data on the dissipation of the parameters of technological loads and limitations when considering the strength of equipment on the base of the probabilistic approach.
The main sources of danger for rolling equipment are rolling routes of billets with maximum dimensions and reductions, as well as with high deformation resistance due to either the basic mechanical properties of titanium alloys or a low deformation temperature in combination with preliminary hardening.
Consequently, it is necessary to relate the levels of technological loads to specific rolling routes and thereby identify the most stressful reduction patterns in terms of equipment loading.
In addition, at this stage, it is necessary to correct the results of the failure risk analysis, taking into account the statistical data accumulated at the enterprise, recorded in the repair logs for each of the rolling stands.
Gostev, Reduction of the Dynamic Loads in the Universal Stands of a Rolling Mill, Metallurgist 59 (2015) 315-323 doi: 10.1007/s11015-015-0103-8
The main sources of danger for rolling equipment are rolling routes of billets with maximum dimensions and reductions, as well as with high deformation resistance due to either the basic mechanical properties of titanium alloys or a low deformation temperature in combination with preliminary hardening.
Consequently, it is necessary to relate the levels of technological loads to specific rolling routes and thereby identify the most stressful reduction patterns in terms of equipment loading.
In addition, at this stage, it is necessary to correct the results of the failure risk analysis, taking into account the statistical data accumulated at the enterprise, recorded in the repair logs for each of the rolling stands.
Gostev, Reduction of the Dynamic Loads in the Universal Stands of a Rolling Mill, Metallurgist 59 (2015) 315-323 doi: 10.1007/s11015-015-0103-8
Online since: July 2013
Authors: D.S. Rhee, H.S. Shin
As authors[8] conclude, two conditions need to be considered when photocatalysts are coated onto supports: a) good adherence to the support; b) non reduction of a catalyst activity because of the coating process.
However, in all experiments with TCPG under sunlight there was blue shift of the absorption band, for example Fig. 2, constructed using the data of the previous Figure, presents hypsochromic effects for three wavelength peaks in the course of elapsed photo irradiation time.
Data taken from “Solar light + TCPG” curve of Fig. 1 The effect of initial TiO concentration (Fig. 3) revealed the optimum loading was 25 g/L.
Data of Fig. 4 photocatalytic degradation of MB followed pseudo-first-order kinetics (Fig. 4).
Reduction of photocatalyst’s activity during 15 identical runs with the same 25 g/L of TCPG TCPG photocatalytic activity reduction rates were measured by repeated experiments with the same 25 g/L of coated granules.
However, in all experiments with TCPG under sunlight there was blue shift of the absorption band, for example Fig. 2, constructed using the data of the previous Figure, presents hypsochromic effects for three wavelength peaks in the course of elapsed photo irradiation time.
Data taken from “Solar light + TCPG” curve of Fig. 1 The effect of initial TiO concentration (Fig. 3) revealed the optimum loading was 25 g/L.
Data of Fig. 4 photocatalytic degradation of MB followed pseudo-first-order kinetics (Fig. 4).
Reduction of photocatalyst’s activity during 15 identical runs with the same 25 g/L of TCPG TCPG photocatalytic activity reduction rates were measured by repeated experiments with the same 25 g/L of coated granules.
Online since: July 2011
Authors: Min Guang Fan, Zu Zeng Qin, Zi Li Liu, Tong Ming Su
With the further reduction of x, the Y2O3 diffraction peaks appeared and became increasingly apparent in the XRD patterns, while the BiYO3 diffraction peaks became relatively smaller.
With a reduction of x, BixY(2-x)O3 exhibited a blue shift from Bi1.8Y0.2O3.
The band gaps determined from the equation using the data in the UV-vis spectra of BixY(2-x)O3 (x=2.0, 1.8, 1.6, 1.4, 1.2, 1.0, 0.8, 0.6, 0.4, 0.2) calcined at 750 oC for 10 h are 2.80, 2.42, 2.47, 2.48, 2.50, 2.64, 2.64, 2,68, 2.83, 3.12 eV, respectively.
The data indicates that there are at least three kinds of binding oxygen, namely, a) oxygen in the lattice (O2-) (528.8, 529.1, 529.2 eV) [13], b) oxygen in the hydroxyl group on the photocatalysts’ surface (-OH) (531.4, 531.3, 530.8 eV) [14], and c) oxygen absorbed on the surface (O-) (533.4, 533.0 533.1 eV) [14].
It can be seen from the data obtained that the photocatalytic activities of BixY(2-x)O3 are closely related to the absorbance, band gaps, and the proportions of Bi and Y.
With a reduction of x, BixY(2-x)O3 exhibited a blue shift from Bi1.8Y0.2O3.
The band gaps determined from the equation using the data in the UV-vis spectra of BixY(2-x)O3 (x=2.0, 1.8, 1.6, 1.4, 1.2, 1.0, 0.8, 0.6, 0.4, 0.2) calcined at 750 oC for 10 h are 2.80, 2.42, 2.47, 2.48, 2.50, 2.64, 2.64, 2,68, 2.83, 3.12 eV, respectively.
The data indicates that there are at least three kinds of binding oxygen, namely, a) oxygen in the lattice (O2-) (528.8, 529.1, 529.2 eV) [13], b) oxygen in the hydroxyl group on the photocatalysts’ surface (-OH) (531.4, 531.3, 530.8 eV) [14], and c) oxygen absorbed on the surface (O-) (533.4, 533.0 533.1 eV) [14].
It can be seen from the data obtained that the photocatalytic activities of BixY(2-x)O3 are closely related to the absorbance, band gaps, and the proportions of Bi and Y.