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Online since: December 2013
Authors: Thomas Kloppenborg, A. Erman Tekkaya, Nooman Ben Khalifa, Martin Schwane, Andreas Jäger
Material data for EN AW-6063 was taken from the HyperXtrude material database.
However, the volume constancy results in a slight reduction of the material flow passing feeder F1 and a significant reduction of the material flow passing feeder F3.
However, the volume constancy results in a slight reduction of the material flow passing feeder F1 and a significant reduction of the material flow passing feeder F3.
Online since: April 2016
Authors: Aneta Idziak
Table 2 contains material data adopted for the study.
The above results lead to the conclusions that the reduction in the stent thickness leads to a reduction in the expansion pressure required for deformation but it also results in a considerable dogboning.
The above results lead to the conclusions that the reduction in the stent thickness leads to a reduction in the expansion pressure required for deformation but it also results in a considerable dogboning.
Online since: November 2014
Authors: Ming Hou Xu, Peng Wang, Zhen Guo Chen, Xun Gong, Biao Zhang
Dehydration leads to the large reduction of hydroxyl groups while depolymerization brings little change.
The ratio of C3 and O3 from wire mesh char is higher than the char from the horizontal tube furnace reactor, this indicates that C=O is produced from primary reaction and the secondary reaction leads to reduction of C3 and O3.
Comparing the data from Table 3 and Table 5, it's easy to draw the conclusion that crystallinity has large effect on cellulose pyrolysis.
The ratio of C3 and O3 from wire mesh char is higher than the char from the horizontal tube furnace reactor, this indicates that C=O is produced from primary reaction and the secondary reaction leads to reduction of C3 and O3.
Comparing the data from Table 3 and Table 5, it's easy to draw the conclusion that crystallinity has large effect on cellulose pyrolysis.
Online since: September 2014
Authors: Arkadiusz Kwiecień, Matija Gams, Miha Tomaževič
It is rarely used in practice due to difficult and labor intensive application, and lack of reliable data on its effect on seismic resistance.
Use of reinforcement also prevents reduction of displacement capacity, which occurs if no reinforcement is used.
It is hypothesized that the reduction in displacement capacity of unreinforced repointed walls is due to use of stiffer and stronger mortar for repointing, which changes the crack pattern from one that runs predominantly through joints on a wider area to one that runs mostly through the units on a narrower area (see Figure 4).
Use of reinforcement also prevents reduction of displacement capacity, which occurs if no reinforcement is used.
It is hypothesized that the reduction in displacement capacity of unreinforced repointed walls is due to use of stiffer and stronger mortar for repointing, which changes the crack pattern from one that runs predominantly through joints on a wider area to one that runs mostly through the units on a narrower area (see Figure 4).
Online since: September 2014
Authors: Humberto Gracher Riella, G.J.M. Martins, P.B. Prates, Jose Carmino G. Junior, Jonas V. Matsinhe, Cláudia Terezinha Kniess
The use of theories governing the crystallization phenomena in the development of glassceramic materials from bottom ash of coal was an important step towards obtaining technology high value-added materials, generating industrial options that reduce the environmental problems enabling the reduction of the costs of the raw materials necessary to the process [6].
As MAGELLA [13] said, the offset of the crystallization temperature, observed by the crystallization temperature reduction with increasing in the treatment temperature, represents the largest formation of nuclei.
(International Centre for Diffraction Data.
As MAGELLA [13] said, the offset of the crystallization temperature, observed by the crystallization temperature reduction with increasing in the treatment temperature, represents the largest formation of nuclei.
(International Centre for Diffraction Data.
Online since: June 2014
Authors: Teo Wee, Mohd Shahir Liew, Zubair Imam Syed, Muhammad Aswin
Details of Specimens under Study
In this study, data of RC dapped-end beams tested by Wang et al. [6] were used to predict the failure loads according to different codes.
To determine the strength of tie members, [11-13] has the different values of strength reduction factor (φ) for steel reinforcement namely: 0.75; 0.87; 0.95, respectively.
As = [Vu* (a/d) +Nu* (h/d)]/ (φ*fy) (1) Where Vu = P; φ = strength reduction factor = 0.75; and assumed that Nu = 0 2.
To determine the strength of tie members, [11-13] has the different values of strength reduction factor (φ) for steel reinforcement namely: 0.75; 0.87; 0.95, respectively.
As = [Vu* (a/d) +Nu* (h/d)]/ (φ*fy) (1) Where Vu = P; φ = strength reduction factor = 0.75; and assumed that Nu = 0 2.
Online since: June 2014
Authors: Ke Ping Zhou, Li Jie Guo, Xiao Cong Yang, Wen Yuan Xu, Guang Sheng Liu
Table 3 Experiment results for CRF
Backfill type rock/tailings
Water/cement ratio
Sample diameter [mm]
Marbles
Diorites
Specific gravity [g/cm3]
Compressive strength [MPa]
Specific gravity [g/cm3]
Compressive strength [MPa]
85/15
1.30
152
2 552
2.502
2 474
2.235
80/20
1.61
152
2 505
2.017
2 443
1.460
70/30
2.22
152
2 485
1.174
2 399
0.934
60/40
2.83
152
2 400
1.058
2 352
0.827
50/50
3.44
152
2 344
0.744
2 314
0.708
30/70
4.65
152
2 240
0.463
2 233
0.441
0/100
6.48
152
2 132
0.255
2 143
0.255
Table 3 shows that under the conditions of cement content of 6% and a slurry concentration of 72% in the cemented waste rock filling body, the specific gravity of the filling body decreased gradually with a reduction in the waste rock content, and the specific gravity of the cemented marble rock filling body was a little larger than that of the diorite rock filling body.
From the data in the table, a diagram comparing the strength of the cemented waste rocky fill and the corresponding strength of the cemented tailings filling body is presented in Fig. 4.
From the strength curve of the cemented waste rocky fill body under the condition of an invariable tailings to cement ratio, it is seen that the strength of the cemented waste rocky fill body decreased as the waste rock content increased owing to the reduction in the cement content of the filling body.
From the data in the table, a diagram comparing the strength of the cemented waste rocky fill and the corresponding strength of the cemented tailings filling body is presented in Fig. 4.
From the strength curve of the cemented waste rocky fill body under the condition of an invariable tailings to cement ratio, it is seen that the strength of the cemented waste rocky fill body decreased as the waste rock content increased owing to the reduction in the cement content of the filling body.
Online since: December 2014
Authors: A.A. Zaripova, B.T. Dossumova, T.V. Shakiyeva, U.N. Dzhatkambayeva, E.Zh. Aybasov, E.M. Shakiyev, V.S. Yemelyanova
The selectivity of СН3ОН oxidation reaction raises symbatically to the heat of activation of the oxides superficial reduction by hydrogen.
The composition of products is identical both at the СН3ОН catalytic oxidation and at the reduction of the СН3ОН oxides surface.
= 13%, catalyst specific surface area – 12,6 m2/g, methanol content in admixture – 6,0%, oxygen content – 9,0 %, T = 540K, Mo/Fe = 2,0 Gas stream rate, ml/mines Methanol conversion degree, % Formaldehyde output, % Methanol oxidation to formaldehyde selectivity, % 210,0 92,3 91,9 99,6 250,0 96,4 96,2 99,8 340,0 99,3 99,3 100,0 450,0 97,5 97,4 99,9 550,0 93,2 93,1 99,9 600,0 87,3 87,3 100,0 From the given data it is visible that silicate catalyst key parameters rise in the interval of CH3OH–O2–N2 gas stream rate from 210 to 340 ml/min.
The composition of products is identical both at the СН3ОН catalytic oxidation and at the reduction of the СН3ОН oxides surface.
= 13%, catalyst specific surface area – 12,6 m2/g, methanol content in admixture – 6,0%, oxygen content – 9,0 %, T = 540K, Mo/Fe = 2,0 Gas stream rate, ml/mines Methanol conversion degree, % Formaldehyde output, % Methanol oxidation to formaldehyde selectivity, % 210,0 92,3 91,9 99,6 250,0 96,4 96,2 99,8 340,0 99,3 99,3 100,0 450,0 97,5 97,4 99,9 550,0 93,2 93,1 99,9 600,0 87,3 87,3 100,0 From the given data it is visible that silicate catalyst key parameters rise in the interval of CH3OH–O2–N2 gas stream rate from 210 to 340 ml/min.
Online since: July 2015
Authors: Luís F. Menezes, Ana Maia, Marta C. Oliveira, António Andrade-Campos
The noise of the simulations (difference
between data and regression values) is a zero-mean distribution with a standard deviation of 0.16 mm
(0.17%).
Simulations with higher values of ∆θ lead to necking due to the reduction of the gap between the tools.
Nevertheless, the main behaviour is preserved since an improvement is achieved with a relative error reduction of 66% from the original to the optimised tools.
Simulations with higher values of ∆θ lead to necking due to the reduction of the gap between the tools.
Nevertheless, the main behaviour is preserved since an improvement is achieved with a relative error reduction of 66% from the original to the optimised tools.
Online since: July 2015
Authors: Xabier Agirretxe, Rafael Ortubay, Eneko Sáenz de Argandoña, Lander Galdos, Joseba Mendiguren
A very good example is the early ULSAB project started in 1995 and leaded by the principal steel makers to develop new advanced steels where a 25% of weight reduction was possible keeping the structural behavior.
Characterization of the solution heat treatment Aiming to optimize the future industrial process of the W-temper forming strategy, as received material was longitudinally cut in small pieces of 100x20 mm and solution heat treated using different oven temperatures and times. 470ºC was proven to be a good compromise for the reduction of the hardness in a small time.
Each hardness data represents an average measurement of three through-thickness measurements from three different parts treated at the same conditions.
Characterization of the solution heat treatment Aiming to optimize the future industrial process of the W-temper forming strategy, as received material was longitudinally cut in small pieces of 100x20 mm and solution heat treated using different oven temperatures and times. 470ºC was proven to be a good compromise for the reduction of the hardness in a small time.
Each hardness data represents an average measurement of three through-thickness measurements from three different parts treated at the same conditions.