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Online since: February 2018
Authors: Bei Gang Li, Li Wei Sun
Isothermal adsorption data agree with Langmuir model, and the saturated adsorption capacities are 1667mg/g for DO-S, 1111mg/g for DG-BE and 1111mg/g for DB-BE respectively at 298K.
By comparing the fitted results of isothermal experimental data using three models from Table 1, the best fitting effect obtained by Langmuir model (correlation coefficients R2 > 0.99) shows that Langmuir model can describe equilibrium adsorption behavior well and the adsorption is monolayer coverage of direct dyes DO-S, DG-BE and DB-BE on Ca/CTS/FA under the concentration range studied.
The experimental data also follow D-R model better which reveals the existence of pore filling of dye molecules into the micro pore of Ca/CTS/FA in the adsorption process.
The positive ΔS° values indicate a reduction of orderliness on the adsorbent surface.
Data. 62 (2017) 596-07
By comparing the fitted results of isothermal experimental data using three models from Table 1, the best fitting effect obtained by Langmuir model (correlation coefficients R2 > 0.99) shows that Langmuir model can describe equilibrium adsorption behavior well and the adsorption is monolayer coverage of direct dyes DO-S, DG-BE and DB-BE on Ca/CTS/FA under the concentration range studied.
The experimental data also follow D-R model better which reveals the existence of pore filling of dye molecules into the micro pore of Ca/CTS/FA in the adsorption process.
The positive ΔS° values indicate a reduction of orderliness on the adsorbent surface.
Data. 62 (2017) 596-07
Online since: September 2016
Authors: Carmen Andrade, Eric Ivan Moreno, Andres Torres-Acosta, Jose Trinidad Pérez-Quiroz, Miguel Martínez-Madrid, Elia Alonso-Guzmán, Pedro Castro-Borges, Juan Genescá-Llongueras, Benjamin Valdez-Salas, Luis Eduardo Ariza-Aguilar, Miguel Baltazar, Demetrio Nieves, Facundo Almeraya-Calderón, Citlali Gaona-Tiburcio, Tezozomoc Pérez-López, Esteban López-Vázquez, Jorge Rodriguez, Nuria Rebolledo, Oladis Troconis-Rincón, Wilfrido Martínez Molina
Environmental data was collected on each exposure site, including rainfall, relative humidity, time of wetness, temperature, wind velocity, and carbon dioxide/chloride concentrations.
However, the main concern with concrete carbonation is the reduction of the pore solution pH from more than 12.5 to less than 9.
By taking into account the reduction of the carbonation rate due to RH and TOW, the environment’s order of aggressiveness would be in first place Mexicali and Chihuahua, followed closely by México City, Oaxaca, and Querétaro, and, finally, Morelia, Mérida, and Toluca.
Table 4 presents the carbonation depth measured after two years of exposure in the 0.65 w/c ratio concrete specimens, as well as the corresponding carbonation coefficients, with the exception of Mérida’s data, that correspond to only one year of exposure.
However, the main concern with concrete carbonation is the reduction of the pore solution pH from more than 12.5 to less than 9.
By taking into account the reduction of the carbonation rate due to RH and TOW, the environment’s order of aggressiveness would be in first place Mexicali and Chihuahua, followed closely by México City, Oaxaca, and Querétaro, and, finally, Morelia, Mérida, and Toluca.
Table 4 presents the carbonation depth measured after two years of exposure in the 0.65 w/c ratio concrete specimens, as well as the corresponding carbonation coefficients, with the exception of Mérida’s data, that correspond to only one year of exposure.
Online since: December 2025
Authors: Muslum Ahmed Gurbanov, Ulviye Aydin Guliyeva, Elshen Valeh Mirzazada
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: August 2008
Authors: N. Moonprasith, S. Loykulnant, C. Kongkaew
It was found that reduction of the cloud point and the precipitation
point of HPMC also depended on both concentration and type of cations and anions of inorganic
salts.
The data show that the values of separation ratio are dependent on sodium alginate concentration and separation time.
The data show that the values of separation ratio are dependent on sodium alginate concentration and separation time.
Online since: December 2011
Authors: Jeng Shyang Pan, Bin Yih Liao, Ming Jer Tsai, Vaci Istanda, Pei Wei Tsai
In order to analyze the improvement on the accuracy of finding the near best solution and the reduction in the computational cost, three well-known and commonly used test functions in the field of swarm intelligence for testing the accuracy and the performance of the algorithm, are used in the experiments.
Tsai: A Reversible Data Embedding Scheme Based on Hash Functions for VQ Index Tables.
Tsai: A Reversible Data Embedding Scheme Based on Hash Functions for VQ Index Tables.
Online since: March 2024
Authors: Milan Holy, Jiří Kolisko, Simona Potuckova
At the conclusion, an evaluation of the effect of different types of covering of the concrete structure on the reduction of the number and size of surface cracks caused by hydration heat is carried out.
Fig. 4 Experimental block and surrounding concrete blocks, working joint on the side, ATENA input data.
Fig. 4 Experimental block and surrounding concrete blocks, working joint on the side, ATENA input data.
Optimizing a Route of Public Passenger Transportation in the Area Drobeta Turnu Severin Municipality
Online since: May 2025
Authors: Mario Trotea, Ionuţ Daniel Geonea, Augustin Constantinescu
The current conditions regarding the public transport of people were presented, measurements were made on the route and trips were surveyed, these data being necessary to establish the input values for optimization.
From the analysis of the data in table 1, it can be seen that the distances between the stations are variable from a minimum of 330 meters to a maximum of 1640 meters, and the average distance between the stations is approximately 625 meters.
[s] (12) where: tuc - is the average ascent and descent for a traveller and is equal in the analysis path tuc =1,5 sec/passenger (1,2-2,2s) and C – is the total number of passengers for a voyage which, according to data obtained by measurements on the route during peak hours, C = 300 passengers.
This reduction in commercial speed can be compensated for by streamlining traffic, reducing the time of ascent and descent of passengers, creating priority lanes for public transport on streets with multiple lanes, avoiding stops at bus stations without ascent and descent of passengers.
From the analysis of the data in table 1, it can be seen that the distances between the stations are variable from a minimum of 330 meters to a maximum of 1640 meters, and the average distance between the stations is approximately 625 meters.
[s] (12) where: tuc - is the average ascent and descent for a traveller and is equal in the analysis path tuc =1,5 sec/passenger (1,2-2,2s) and C – is the total number of passengers for a voyage which, according to data obtained by measurements on the route during peak hours, C = 300 passengers.
This reduction in commercial speed can be compensated for by streamlining traffic, reducing the time of ascent and descent of passengers, creating priority lanes for public transport on streets with multiple lanes, avoiding stops at bus stations without ascent and descent of passengers.
Online since: July 2013
Authors: Francesco Aymerich, Dian Shi Feng
Numerical results obtained by FE simulations were compared with experimental data and observations collected through impact tests carried out at various impact energies.
Typical impact damage in sandwich elements consists of a combination of different failure mechanisms, such as delaminations, matrix cracking, fibre fracture, face-core debonding and core crushing, which, even if difficult –or even impossible- to detect by visual inspection, may induce significant reductions in stiffness and strength of the composite blade.
Layer properties Interface properties E11=122 [GPa]; E22=E33=6.2 [GPa]; v12=v13=0.35; v23=0.5 Xt=1850 [MPa]; Xc=1470 [MPa]; Yt=29 [MPa]; Yc=140 [MPa] Gft=92 [kJ/m2]; Gfc=80 [kJ/m2]; Gmt=520 [J/m2]; Gmc=1610 [J/m2] kN=120 [GPa/mm]; kS=kT=43 [GPa/mm] N=30 [MPa]; S=T=50 [MPa] GIC=520 [J/m2]; GIIC=GIIIC=920 [J/m2] The accuracy of the FE model was finally assessed through comparison with experimental data from impact tests on sandwich plates with thin composite skins laid up in a cross-ply [0/903/0] sequence.
The model was assessed through comparison with experimental data acquired by impact tests on sandwich plates with different core densities, core thicknesses and facesheets layups.
Typical impact damage in sandwich elements consists of a combination of different failure mechanisms, such as delaminations, matrix cracking, fibre fracture, face-core debonding and core crushing, which, even if difficult –or even impossible- to detect by visual inspection, may induce significant reductions in stiffness and strength of the composite blade.
Layer properties Interface properties E11=122 [GPa]; E22=E33=6.2 [GPa]; v12=v13=0.35; v23=0.5 Xt=1850 [MPa]; Xc=1470 [MPa]; Yt=29 [MPa]; Yc=140 [MPa] Gft=92 [kJ/m2]; Gfc=80 [kJ/m2]; Gmt=520 [J/m2]; Gmc=1610 [J/m2] kN=120 [GPa/mm]; kS=kT=43 [GPa/mm] N=30 [MPa]; S=T=50 [MPa] GIC=520 [J/m2]; GIIC=GIIIC=920 [J/m2] The accuracy of the FE model was finally assessed through comparison with experimental data from impact tests on sandwich plates with thin composite skins laid up in a cross-ply [0/903/0] sequence.
The model was assessed through comparison with experimental data acquired by impact tests on sandwich plates with different core densities, core thicknesses and facesheets layups.
Online since: December 2013
Authors: Yu Guo, Jing Zhou Zhao, Qian Wang
This article analyzes the influence of tectonic characteristics on the accumulation of CBM in H area, combining the tectonic characteristics and the actual production data, finally conclusions can be drawn that the uplifting movement of crust after coal- forming period could break the original adsorption equilibrium, then CBM would escape under unfavorable preservation condition; different scales of fracturesand folds formed by tectonic movements play an important role in the preservation and dissipation as well as in the enrichment and accumulation.
When the coal seam is above the neutral plane, the upper coal seam suffers the tensile stress, which is the strongest an the core, making the ductile strata at the core become thinner, the porosity of which gets bigger as well, consequently, the gas permeability of coal seam increases, providing access to the escape of CBM, at the same time, a lot of CBM turns to the free state from the absorption state along with the formation of folds because of the plasticity of coal seam, escaping from the pores, causing the reduction of CBM content at the core.
The gas content data are 11.73m3/t, 6.3m3/t, 8.94m3/t and 8.91m3/t respectively, reflecting that the gas content of lower structure is better than that of the higher (Fig.3.2).
The gas content data are 9.56m3/t, 6.3m3/t, 9.99m3/t, 7.71m3/t and 15.07m3/t respectively from the south to the north.
When the coal seam is above the neutral plane, the upper coal seam suffers the tensile stress, which is the strongest an the core, making the ductile strata at the core become thinner, the porosity of which gets bigger as well, consequently, the gas permeability of coal seam increases, providing access to the escape of CBM, at the same time, a lot of CBM turns to the free state from the absorption state along with the formation of folds because of the plasticity of coal seam, escaping from the pores, causing the reduction of CBM content at the core.
The gas content data are 11.73m3/t, 6.3m3/t, 8.94m3/t and 8.91m3/t respectively, reflecting that the gas content of lower structure is better than that of the higher (Fig.3.2).
The gas content data are 9.56m3/t, 6.3m3/t, 9.99m3/t, 7.71m3/t and 15.07m3/t respectively from the south to the north.
Online since: September 2012
Authors: Wei Wang, Gang Qiao, Rehan Khan, Yue Wang, Song Zuo Liu
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.