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Online since: October 2010
Authors: Carolina A. Pinto, L.T. Hamassaki, Pedro M. Büchler, Francisco Rolando Valenzuela-Díaz, Jo Dweck, John J. Sansalone, Frank K. Cartledge, N.E.K. Albanez
The cement hydration is observed in all samples by the presence of the peaks Q1and Q2 and the reduction of the peak of silica monosilicate (SiO4), Q0.
When no clays are added, the higher is the waste content, the lower is the compressive strength, as can be seen comparing CT(10% case), CT15 and CT20 sample data.
A higher reduction is observed when 15% is applied.
The samples containing 20% of waste do not present significant changes when compared to the 15% case data.
F.Barth and P.Percin: Stabilization and solidification of hazardous wastes (Park Ridge, Noyes Data, 19).
When no clays are added, the higher is the waste content, the lower is the compressive strength, as can be seen comparing CT(10% case), CT15 and CT20 sample data.
A higher reduction is observed when 15% is applied.
The samples containing 20% of waste do not present significant changes when compared to the 15% case data.
F.Barth and P.Percin: Stabilization and solidification of hazardous wastes (Park Ridge, Noyes Data, 19).
Online since: November 2025
Authors: Volodymyr Oliinyk, Kostiantyn Afanasenko, Natalia Saienko, Oleksandr Hryhorenko, Volodymyr Lipovyi
The essence of the method is to heat a set of samples in a standard temperature regime with subsequent assessment of the test data using mathematical analysis methods to obtain the characteristics of the fire protection capacity of the coating.
During the tests, metal samples are placed in a fire furnace, and using thermocouples located at specified points, the temperature data of the samples are taken for varying durations of fire exposure without load.
The results of processing the experimental data allow to determine the thermal conductivity of the expanded coke layer of the fire retardant coating after its stabilization.
The use of an optimized method for evaluating the fire protection effectiveness of intumescent fire retardant coatings allows for a significant reduction in sample preparation time when planning and conducting the experiment.
The use of the optimized method allows for a reduction in the time required for sample preparation when planning and conducting the experiment, as well as investigating the effectiveness of intumescent fire retardant coatings under temperature regimes different from the standard fire regime.
During the tests, metal samples are placed in a fire furnace, and using thermocouples located at specified points, the temperature data of the samples are taken for varying durations of fire exposure without load.
The results of processing the experimental data allow to determine the thermal conductivity of the expanded coke layer of the fire retardant coating after its stabilization.
The use of an optimized method for evaluating the fire protection effectiveness of intumescent fire retardant coatings allows for a significant reduction in sample preparation time when planning and conducting the experiment.
The use of the optimized method allows for a reduction in the time required for sample preparation when planning and conducting the experiment, as well as investigating the effectiveness of intumescent fire retardant coatings under temperature regimes different from the standard fire regime.
Online since: September 2014
Authors: Hao Chen, Wei Xiong, Shi Yong Yang, Huang Qiang Li
The method of fuzzy reasoning of fault diagnosis, requires effective means to objectively and fuzzily express uncertain factors of the power , makes full use of the knowledge of history and statistical data and experience.However,when the structure of the object changes,updating maintenance of knowledge base that builded by corresponding fuzzy inference becomes a problem.
Method based on rough set theory[4] The strong qualitative analysis ability is the outstanding advantage of Rough set theory.The main idea is under the premise of keeping the ability of classification, through the reduction of knowledge, exporting decision or classification rules,applying rough set theory to power system fault diagnosis.The basic idea is using the action information of protection and circuit breaker as condition attributes for fault classification,considering various possible fault situation and establishing decision table,deleting unimportant and irrelevant attributes of the knowledge base and then extracting diagnosis rules.
Combining expert system and fuzzy inference[6] The method of fuzzy reasoning needs to make full use of the knowledge of history and statistical data and experience, and this point just can be added by expert system.The expert system provides the historical statistical data and experience and the fuzzy inference is better for dealing with the uncertainty of the action of relay protection and the incompleteness of the fault informations in power system fault diagnosis.
As shown in Figure [3],it uses the reduction of rough set theory to filter the knowledge before the knowledge is put into the knowledge base,eliminates knowledge base’s redundant and forms a simple knowledge base,then uses the method of expert system to diagnose fault.
Method based on rough set theory[4] The strong qualitative analysis ability is the outstanding advantage of Rough set theory.The main idea is under the premise of keeping the ability of classification, through the reduction of knowledge, exporting decision or classification rules,applying rough set theory to power system fault diagnosis.The basic idea is using the action information of protection and circuit breaker as condition attributes for fault classification,considering various possible fault situation and establishing decision table,deleting unimportant and irrelevant attributes of the knowledge base and then extracting diagnosis rules.
Combining expert system and fuzzy inference[6] The method of fuzzy reasoning needs to make full use of the knowledge of history and statistical data and experience, and this point just can be added by expert system.The expert system provides the historical statistical data and experience and the fuzzy inference is better for dealing with the uncertainty of the action of relay protection and the incompleteness of the fault informations in power system fault diagnosis.
As shown in Figure [3],it uses the reduction of rough set theory to filter the knowledge before the knowledge is put into the knowledge base,eliminates knowledge base’s redundant and forms a simple knowledge base,then uses the method of expert system to diagnose fault.
Online since: May 2014
Authors: Leo A.I. Kestens, Herman Terryn, Kim Verbeken, Linsey Lapeire, Esther Martinez Lombardia, Iris de Graeve
The corresponding crystallographic orientation data were obtained by Electron Backscatter Diffraction (EBSD).
Two reactions take place simultaneously on the copper surface, namely the reduction of gold and the oxidation of copper: Cu oxidation: 3Cu(s) ® 3Cu2+(aq) + 6e- (E° = +0.337V) Au reduction: 2Au3+(aq) + 6e- ® 2Au(s) (E° = +1.52V) The local anodic/cathodic reactivity differences at the surface of the copper will provoke very local electrochemical effects.
The data presented so far suggest that a pair of adjacent grains of <111> // ND and <001> // ND orientation is a necessary prerequisite for observing a significant height difference.
Consequently, by linking the results of the gold nanoplating of polycrystalline copper with already established literature data on grain boundary energy and the behavior of special boundaries such as some CSL boundaries; the applicability and potential of the gold nanoplating technique is demonstrated and confirmed.
Two reactions take place simultaneously on the copper surface, namely the reduction of gold and the oxidation of copper: Cu oxidation: 3Cu(s) ® 3Cu2+(aq) + 6e- (E° = +0.337V) Au reduction: 2Au3+(aq) + 6e- ® 2Au(s) (E° = +1.52V) The local anodic/cathodic reactivity differences at the surface of the copper will provoke very local electrochemical effects.
The data presented so far suggest that a pair of adjacent grains of <111> // ND and <001> // ND orientation is a necessary prerequisite for observing a significant height difference.
Consequently, by linking the results of the gold nanoplating of polycrystalline copper with already established literature data on grain boundary energy and the behavior of special boundaries such as some CSL boundaries; the applicability and potential of the gold nanoplating technique is demonstrated and confirmed.
Online since: June 2015
Authors: Chang Xiu Gong, Jian Guo Jiang
All data presented in Table 1 and Figures 1-5 are representative of at least three independent experiments in which all samples were assayed in triplicate.
The above data demonstrated that an ultrasonic treatment duration of 20 min was optimal for the dissolution of organic matter and release of carbon elements from excess sludge.
The data obtained revealed a strong correlation between the COD and TOC of sludge supernatant.
[2] Rai CL, Struenkmann G, Mueller J, Rao PG. (2004) Influence of ultrasonic disintegration on sludge growth reduction reduction and its estiomation by respirometry.
The above data demonstrated that an ultrasonic treatment duration of 20 min was optimal for the dissolution of organic matter and release of carbon elements from excess sludge.
The data obtained revealed a strong correlation between the COD and TOC of sludge supernatant.
[2] Rai CL, Struenkmann G, Mueller J, Rao PG. (2004) Influence of ultrasonic disintegration on sludge growth reduction reduction and its estiomation by respirometry.
Online since: July 2007
Authors: Thierry Baudin, Laurent Barrallier, Polina Volovitch, Richard Penelle, F. Caleyo
In the
present work we have tried to take into account the phenomena of cell coalescence and growth and
to model nucleation on the basis of experimental TEM data about the early stages of annealing
processes by using a critical nuclei size hypothesis.
The data necessary for using the model are based on the kinetics of stored energy evolution and nucleation mechanisms which are still not well described by analytical models.
However, the driving force for recrystallization is the dislocation density reduction expressed as diminution of the stored energy and it can be ten times greater than the driving force for grain growth [17].
Hnucl/Hdeform Recovery time 85%REX time Fraction of nucleus Final grain size (average value) Final grain size (mean value) 0.5 521 MCS 824 MCS 0.83% 75 µm 92 µm 0.8 97 MCS 355 MCS 1.88% 60 µm 82 µm 0.9 12 MCS 255 MCS 2.37% 59 µm 68 µm Experiment 5 min 75 min No data 71 µm 82 µm It should be also marked (fig. 1b) that the absolute value of the maximum stored energy (and hence the ratio Hmax/ HABγ because of the constant value of HABγ in present simulation) does not influence the kinetics.
The simulation is applied to the annealing of 40% cold-rolled IF-Ti steel and 38% (area reduction) cold drawn copper wires.
The data necessary for using the model are based on the kinetics of stored energy evolution and nucleation mechanisms which are still not well described by analytical models.
However, the driving force for recrystallization is the dislocation density reduction expressed as diminution of the stored energy and it can be ten times greater than the driving force for grain growth [17].
Hnucl/Hdeform Recovery time 85%REX time Fraction of nucleus Final grain size (average value) Final grain size (mean value) 0.5 521 MCS 824 MCS 0.83% 75 µm 92 µm 0.8 97 MCS 355 MCS 1.88% 60 µm 82 µm 0.9 12 MCS 255 MCS 2.37% 59 µm 68 µm Experiment 5 min 75 min No data 71 µm 82 µm It should be also marked (fig. 1b) that the absolute value of the maximum stored energy (and hence the ratio Hmax/ HABγ because of the constant value of HABγ in present simulation) does not influence the kinetics.
The simulation is applied to the annealing of 40% cold-rolled IF-Ti steel and 38% (area reduction) cold drawn copper wires.
Online since: July 2007
Authors: Ruslan Valiev, Rinat K. Islamgaliev, M.A. Bardinova, N.F. Yunusova, A.R. Kilmametov
The plates were rolled with a total
reduction up to 93% to the final thickness of ≈2 mm.
Experimental data obtained for incomplete pole figures were processed by the software package «popLA» [17].
The volume fraction of precipitates (10%) is agreed with the data obtained from the earlier studies of the ECAP samples with the diameter of 20 mm [4,5].
Simultaneously, one could observe a noticeable reduction of the volume fraction of precipitates down to 5%, the average size of which did not exceed 0.2 µm.
The comparison of data given in Table 1 and Fig.6 point at the presence of correlation between the values of texture maxima intensity and elongation to failure at testing in superplasticity conditions.
Experimental data obtained for incomplete pole figures were processed by the software package «popLA» [17].
The volume fraction of precipitates (10%) is agreed with the data obtained from the earlier studies of the ECAP samples with the diameter of 20 mm [4,5].
Simultaneously, one could observe a noticeable reduction of the volume fraction of precipitates down to 5%, the average size of which did not exceed 0.2 µm.
The comparison of data given in Table 1 and Fig.6 point at the presence of correlation between the values of texture maxima intensity and elongation to failure at testing in superplasticity conditions.
Online since: October 2006
Authors: J. Stelling, Joachim Deubener, Stefan Mangold, Joerg Goettlicher, Harald Behrens
The results indicate that sulphur diffusivity in high temperature
melts is close to the Eyring diffusivity calculated from viscosity data.
Other reasons for adding sulphate to glass melts are (i) oxidation of heterovalent cations (e. g. 2 Fe2+ + ½ O2 → 2 Fe3+ + O 2- ), (ii) reduction of surface tension of primary silicate melts and therefore improvement of the initial melting process, and (iii) production of stained glasses.
A lot of previous studies provided data about solubility of sulphur in silicate melts of technical interest [e. g. 4,5,6].
The position of the S-Kα peak was similar for the sulphite and the sulphate, but at significant lower energy for the sulphide, consistent with data from literature [12].
Other reasons for adding sulphate to glass melts are (i) oxidation of heterovalent cations (e. g. 2 Fe2+ + ½ O2 → 2 Fe3+ + O 2- ), (ii) reduction of surface tension of primary silicate melts and therefore improvement of the initial melting process, and (iii) production of stained glasses.
A lot of previous studies provided data about solubility of sulphur in silicate melts of technical interest [e. g. 4,5,6].
The position of the S-Kα peak was similar for the sulphite and the sulphate, but at significant lower energy for the sulphide, consistent with data from literature [12].
Online since: July 2012
Authors: L. Yan, J.S. Zhao
The data at different cyanide concentrations, different temperature and different oxygen pressure are obtained.
However, platinum and palladium can not be dissolved in the cyanide solutions at room temperature and atomspheric press, although it is possible from their thermodynamic data[2,3], To elevte reaction temperature and/or under oxygen pressure, the dissolution reaction kinetics of cyanides with platinum and palladium can be improved.
The activation energy data shows the dissolution of platinum involves electrochemical process.
The dissolution mechanism involves an electrochemical process in which the anodic reaction is platinum oxidation while the cathodic reaction is oxygen reduction
However, platinum and palladium can not be dissolved in the cyanide solutions at room temperature and atomspheric press, although it is possible from their thermodynamic data[2,3], To elevte reaction temperature and/or under oxygen pressure, the dissolution reaction kinetics of cyanides with platinum and palladium can be improved.
The activation energy data shows the dissolution of platinum involves electrochemical process.
The dissolution mechanism involves an electrochemical process in which the anodic reaction is platinum oxidation while the cathodic reaction is oxygen reduction
Online since: May 2020
Authors: Denis B. Solovev, E.V. Saltanova, Vladimir E. Absimetov
At that the main objectives of the research were reduction of the labor coefficient of work relating to the preparation of surfaces of metal building structures, by applying the rust painting method, and creation of anticorrosive materials with universal properties combining the functions of rust, primer and basic coating modifiers.
Analysis of the data in table 2, allows to draw the following conclusions: • coatings with compounds AKS-K and AKS-B protect the clean steel surface to the same extent as the standard coating systems.
The analysis of the graphical display of the data obtained gives interesting conclusions, if we take into account the criteria of the quality of coatings proposed by M.
Analysis of the data in table 2, allows to draw the following conclusions: • coatings with compounds AKS-K and AKS-B protect the clean steel surface to the same extent as the standard coating systems.
The analysis of the graphical display of the data obtained gives interesting conclusions, if we take into account the criteria of the quality of coatings proposed by M.