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Online since: September 2019
Authors: Mikhail D. Mikhailov, Elena V. Bochagina, Nikolai I. Krylov, Lev N. Blinov
On the basis of the obtained data, approaches and criteria for obtaining compositions of low-melting chalcogenide and oxide glasses with practically useful properties are formulated.
The first results on the reduction of crystallization of glassy (amorphous) chalcogenides were obtained in the 60s of the XX century in the study of S and Se with the addition of p-elements of the type As and Ge.
According to the data of IR absorption spectroscopy, the intensity of the absorption bands corresponding to the vibrations of the GeBr2S2/2 structural units depends on the conditions for the synthesis and tempering of glasses, which indicates the instability of the corresponding compound at high temperatures.
Wave numbers of bands 1 – 150 cm-1, 2 – 235 cm -1, 3 – 256 cm -1, 4 – 286 cm -1, 5 – 345 cm -1 According to the data of IR spectroscopy, the three-component interaction is also characteristic for glasses of the (GeSe2)1-x(GeBr4)x system, as well as for glasses (GeS2)1-X(GeBr4)X.
The first results on the reduction of crystallization of glassy (amorphous) chalcogenides were obtained in the 60s of the XX century in the study of S and Se with the addition of p-elements of the type As and Ge.
According to the data of IR absorption spectroscopy, the intensity of the absorption bands corresponding to the vibrations of the GeBr2S2/2 structural units depends on the conditions for the synthesis and tempering of glasses, which indicates the instability of the corresponding compound at high temperatures.
Wave numbers of bands 1 – 150 cm-1, 2 – 235 cm -1, 3 – 256 cm -1, 4 – 286 cm -1, 5 – 345 cm -1 According to the data of IR spectroscopy, the three-component interaction is also characteristic for glasses of the (GeSe2)1-x(GeBr4)x system, as well as for glasses (GeS2)1-X(GeBr4)X.
Online since: December 2025
Authors: Elshen Valeh Mirzazada, Muslum Ahmed Gurbanov, Ulviye Aydin Guliyeva
A mass reduction of 1.89 % is observed at approximately 350 ℃, followed by a significant reduction of 79.2% as pyrolysis progresses.
Although direct reactor-based measurements were not performed, the pyrolysis behavior was reliably inferred from parallel TGA data.
The data presented in Table 2 provide valuable insight into the thermal decomposition behavior of three types of polymer waste: polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET).
The data points were then plotted on a graph of ln(Δt) versus 1T, and an average line was drawn through the points, as illustrated in Figure 3.
The activation energies for the mass loss process were calculated as 3486 kJ/kg for PP, 1198 kJ/kg for PET, and 2736 kJ/kg for PS, consistent with literature data.
Although direct reactor-based measurements were not performed, the pyrolysis behavior was reliably inferred from parallel TGA data.
The data presented in Table 2 provide valuable insight into the thermal decomposition behavior of three types of polymer waste: polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET).
The data points were then plotted on a graph of ln(Δt) versus 1T, and an average line was drawn through the points, as illustrated in Figure 3.
The activation energies for the mass loss process were calculated as 3486 kJ/kg for PP, 1198 kJ/kg for PET, and 2736 kJ/kg for PS, consistent with literature data.
Online since: September 2012
Authors: Gang Qiao, Rehan Khan, Wei Wang, Song Zuo Liu, Yue Wang
In UWA (underwater acoustic) communications, data rate is severely limited by the confined bandwidth source of aquatic channel.
The major information of remains in after the dimensionality reduction from to.
The major information of remains in after the dimensionality reduction from to.
Online since: August 2013
Authors: Dong Qi Wang, Huan Guang Deng, Zhen Lou Chen
Yangtze estuary data, collected over three years, indicates that the temporal and spatial distributions of the environmental gradients reflect complicated seasonal changes and spatial differences in the exchange flux of the dissolved inorganic nitrogen (DIN= NH4++ NO3-+ NO2-) across the sediment-water interface.
Analysis and Data calculating.
They were measured using colorimetry after Zn-Cd reduction, the sulfanilamide and N-(1-naphthyl) ethylene diamine dihydrochloride colorimetry and sodium hypobromite oxidation colorimetry, respectively [21].
Figure 4 Annual average exchange fluxes of dissolved inorganic nitrogen at the sediment-water interface along the tidal flat of the Yangtze estuary (mmol·m-2·d-1) The DIN interface exchange flux data (Figure 4) had wide range, and the average was -3.84 mmol·m-2·d-1, but the fluxes at all the sites had a one to two order of magnitude range from positive to negative (-49.8~24.2 mmol·m-2·d-1).
DIN interface exchange flux data indicate that the DIN flux in Yangtze estuarine tidal flat are comparable with other estuaries in the world, but that it has a wider range of changes from positive to negative than the other area [8, 12], these data suggest that the transfer and the transformation rates of the DIN exchange through the sediment-water interface are active in the Yangtze estuarine tidal flat.
Analysis and Data calculating.
They were measured using colorimetry after Zn-Cd reduction, the sulfanilamide and N-(1-naphthyl) ethylene diamine dihydrochloride colorimetry and sodium hypobromite oxidation colorimetry, respectively [21].
Figure 4 Annual average exchange fluxes of dissolved inorganic nitrogen at the sediment-water interface along the tidal flat of the Yangtze estuary (mmol·m-2·d-1) The DIN interface exchange flux data (Figure 4) had wide range, and the average was -3.84 mmol·m-2·d-1, but the fluxes at all the sites had a one to two order of magnitude range from positive to negative (-49.8~24.2 mmol·m-2·d-1).
DIN interface exchange flux data indicate that the DIN flux in Yangtze estuarine tidal flat are comparable with other estuaries in the world, but that it has a wider range of changes from positive to negative than the other area [8, 12], these data suggest that the transfer and the transformation rates of the DIN exchange through the sediment-water interface are active in the Yangtze estuarine tidal flat.
Online since: April 2022
Authors: Paulo B. Lourenço, Rafael Ramirez, Bahman Ghiassi, Daniel V. Oliveira
Nonetheless, accelerated aging data cannot be used to make reliable service life estimations without a clear correlation with real environmental processes.
However, without real exposure data to reveal the actual degradation phenomena, the accelerated degradation trends must be treated with caution since they may lead to unrealistic results.
The scope is to provide real exposure data to correlate the accelerated aging results, which still lacks in the literature.
The environmental data corresponding to RE1 were retrieved from a nearby meteorological station.
It must be noted that the presented data constitute only preliminary results in the framework of a much more comprehensive experimental campaign.
However, without real exposure data to reveal the actual degradation phenomena, the accelerated degradation trends must be treated with caution since they may lead to unrealistic results.
The scope is to provide real exposure data to correlate the accelerated aging results, which still lacks in the literature.
The environmental data corresponding to RE1 were retrieved from a nearby meteorological station.
It must be noted that the presented data constitute only preliminary results in the framework of a much more comprehensive experimental campaign.
Online since: July 2020
Authors: Vitalii V. Kozlovski, Mikhail E. Levinshtein, Leonid Fursin, Anatoly M. Strel'chuk, Pavel A. Ivanov, Alexander V. Zubov, Alexander A. Lebedev
From the data of noise spectroscopy, the density of traps in the gate oxide Ntv has been estimated.
From the data presented in the inset to Fig 4 one can conclude that the external transconductance is very sensitive to the dose F in the range 1012 cm-2 ≤ F ≤ 4×1013 cm-2.
Frequency of analysis f = 1.22 Hz; Vd = 0.14 V Comparing the data shown in Figs. 2 and 5, it is easy to make sure that there is a correlation between the value of the drain saturation current and the level of low frequency 1/f noise.
This value is comparable to the value h = 3.5 observed in [7] Using the data presented in Fig. 6, one can roughly estimate the effective density of the traps in the gate oxide Ntv [8].
The density of traps in the gate oxide Ntv was estimated from the data of noise spectroscopy.
From the data presented in the inset to Fig 4 one can conclude that the external transconductance is very sensitive to the dose F in the range 1012 cm-2 ≤ F ≤ 4×1013 cm-2.
Frequency of analysis f = 1.22 Hz; Vd = 0.14 V Comparing the data shown in Figs. 2 and 5, it is easy to make sure that there is a correlation between the value of the drain saturation current and the level of low frequency 1/f noise.
This value is comparable to the value h = 3.5 observed in [7] Using the data presented in Fig. 6, one can roughly estimate the effective density of the traps in the gate oxide Ntv [8].
The density of traps in the gate oxide Ntv was estimated from the data of noise spectroscopy.
Online since: October 2013
Authors: Qiang Guo, Shi Gang Wang, Fu Sheng Gao, Feng Lan Cheng
In this study, we simulate the three-way pipe process by finite element software, analyze the forming force influence to the tube forming quality and get the changeable regulation of the pipe wall thickness with conclusion of the wall thickness variation, which provides the reference data and guidance for the actual production of the three-way pipe.
The reduction in the top of main pipe is the most severe, which provides grounds for the designing of three-way pipe hydroforming process in actual production.
The reduction in the top of main pipe is the most severe, which provides grounds for the designing of three-way pipe hydroforming process in actual production.
Online since: January 2016
Authors: Amir Radzi Ab Ghani, Hafizi Lukman, Hafizan Hashim, N.V. David
This data therefore has great potential for further enhance the new design of energy absorbers in oblique position.
If one deformation occurs in a global bending, there will be a considerable reduction in the absorption of energy.
If one deformation occurs in a global bending, there will be a considerable reduction in the absorption of energy.
Online since: October 2012
Authors: Tomáš Bakalár, Henrieta Pavolová, Milan Búgel
The analysis of the solved problems was based on relevant data on the possibilities of using different types of renewable energy in relation to supporting the development of Olšava-Kecerovce region which also includes Čakanovce.
Efficient use of quite a significant potential of renewable energy could help reduce dependence of Slovakia from import of energy resources and to encourage further environmental (reduction of emission load) as well as socio-economic development (reducing unemployment, increasing income of municipalities in the region, etc.) of regions characterized by reporting of significant disparities.
Efficient use of quite a significant potential of renewable energy could help reduce dependence of Slovakia from import of energy resources and to encourage further environmental (reduction of emission load) as well as socio-economic development (reducing unemployment, increasing income of municipalities in the region, etc.) of regions characterized by reporting of significant disparities.
Online since: January 2011
Authors: Huai Liang Wang
Based on the fundamental test data and the mesoscopic approach, a rigid body spring model is developed for simulation of the behavior of large aggregate concrete subjected to uniaxial or multiaxial load.
Large, coarse aggregates require less energy for size reduction with increased production rates and help to reduce thermal cracking and shrinkage during mass-concrete curing.
Fig.5 Comparison of numerical and experimental stress-strain data of unaxial compression Numerical simulation of mass concrete under uniaxial tension A four-graded concrete specimen of size 450 mm×450 mm×900mm subjected to direct uniaxial tension was analyzed.
The macroscopic stress-strain curve obtained by the numerical simulation and the data obtained by test are shown in Fig.6.
Large, coarse aggregates require less energy for size reduction with increased production rates and help to reduce thermal cracking and shrinkage during mass-concrete curing.
Fig.5 Comparison of numerical and experimental stress-strain data of unaxial compression Numerical simulation of mass concrete under uniaxial tension A four-graded concrete specimen of size 450 mm×450 mm×900mm subjected to direct uniaxial tension was analyzed.
The macroscopic stress-strain curve obtained by the numerical simulation and the data obtained by test are shown in Fig.6.