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Online since: August 2006
Authors: J. Hou, George Jeronimidis
Over 60% of weight
reduction could be obtained by replacing a steel spring with a composite one with the same
function.
The model predictions have been verified with test data.
Result on the third eye end design shows that this option led to a significant reduction of shear stresses in the critical area where they occurred with the previous designs.
The model predictions have been verified with test data.
Result on the third eye end design shows that this option led to a significant reduction of shear stresses in the critical area where they occurred with the previous designs.
Online since: December 2018
Authors: Min Ho Jo, Yun Ha Yoo, Byoung Ho Lee
After the immersion test, cleaning specimen and measuring weight reductions were carried out according to ASTM G1 standard. [4].
The long-term immersion data of 24 hours shows that there is no significant difference in the corrosion rate between 6 and 24 hours for ANCOR-S steel.
Corrosion rate calculated by using the surface thickness reduction as a result of field test was measured as 0.07 mm/year for ANCOR-S and 0.14 mm/year for SPHC.
The long-term immersion data of 24 hours shows that there is no significant difference in the corrosion rate between 6 and 24 hours for ANCOR-S steel.
Corrosion rate calculated by using the surface thickness reduction as a result of field test was measured as 0.07 mm/year for ANCOR-S and 0.14 mm/year for SPHC.
Online since: July 2014
Authors: Er Wei Chen, Xiao Wen Zhang
It is clear that the data of 0~20V and those of -20~0V are not overlapped, i.e., the I-V curve is asymmetric.
Section A (-20~0V) depicts that the capacitance is gradually increased with the reduction of bias voltage as a result of the varistor transiting from a conducting state to a dielectric state.
This reduces charge storage ability, which seemingly results in the reduction of capacitance.
Section A (-20~0V) depicts that the capacitance is gradually increased with the reduction of bias voltage as a result of the varistor transiting from a conducting state to a dielectric state.
This reduces charge storage ability, which seemingly results in the reduction of capacitance.
Online since: August 2020
Authors: František Girgle, Petr Štěpánek, Vojtěch Kostiha, Ivana Švaříčková, Ondřej Januš
Even the deflection of the acting force from longitudinal axis of the rod only up to 15° results in a significant reduction of its load-bearing capacity (see Fig. 1).
However, the reduction rate of tensile strength of the specimen gradually decreases.
For a more reliable prediction of GFRP reinforcement behaviour, data from specimens of other diameters/types should be supplemented.
However, the reduction rate of tensile strength of the specimen gradually decreases.
For a more reliable prediction of GFRP reinforcement behaviour, data from specimens of other diameters/types should be supplemented.
Online since: May 2012
Authors: Sheng Li Niu, Ying Jie Li, Chun Mei Lu, Kui Hua Han, Jian Li Zhao
Thermal decomposition characteristics of calcium based organic compounds under carbon dioxide enriched atmosphere through thermogravimetric analysis
Shengli Niu1,a, Yingjie Li1,b, Kuihua Han1,c, Jianli Zhao1,d and Chunmei Lu1,e
1National Engineering Laboratory for Coal–Burning Pollutants Emission Reduction, Shandong University, Jinan 250061, Shandong Province, China
ansl@sdu.edu.cn, bliyj@sdu.edu.cn, chkh@sdu.edu.cn, dsdzhaojl@sdu.edu.cn, ecml@sdu.edu.cn
Keywords: Thermogravimetric analysis; Calcium based organic compound; O2/CO2 atmosphere
Abstract.
Meanwhile, both NO and SO2 are concentrated in oxy-fuel combustion and it is expected that once calcium based organic compound is injected into furnace under oxy-fuel combustion atmosphere, reduction efficiency of SO2 and NO should be higher than the one under air combustion atmosphere.
Concrete data of deduced parameters from TG-DTG curves for CP and MCP under O2/N2 and O2/CO2 atmospheres with different O2 concentrations are listed.
Meanwhile, both NO and SO2 are concentrated in oxy-fuel combustion and it is expected that once calcium based organic compound is injected into furnace under oxy-fuel combustion atmosphere, reduction efficiency of SO2 and NO should be higher than the one under air combustion atmosphere.
Concrete data of deduced parameters from TG-DTG curves for CP and MCP under O2/N2 and O2/CO2 atmospheres with different O2 concentrations are listed.
Online since: September 2016
Authors: E.V. Litvinova, J.G. Mingazheva, V.V. Krymsky
The following physical properties for the hydrated electron have been experimentally established:
oxidation-reduction potential makes –2.7 V;
average radius of charge distribution – 0,28 nanometers;
theoretical time of appearance – s; it is experimentally established that the hydrated electron is formed during period less than 0.02 nanoseconds.
The majority of metals of the first group have more negative oxidation-reduction potentials therefore their cations can't be restored to atoms of metals.
There are interesting data [12] on reaction of an ion of Аg+ silver with and formation of Ag0aq.
The majority of metals of the first group have more negative oxidation-reduction potentials therefore their cations can't be restored to atoms of metals.
There are interesting data [12] on reaction of an ion of Аg+ silver with and formation of Ag0aq.
Online since: August 2009
Authors: Cai Xiang Gu, Guan Jun Zhu, Xiao Yu Tian, Gui Jun Ji, Wei Li
Lubricating oils with three kinds of nanoparticals were tested in
KDE5000E diesel engine.
1 Experiment
1.1 Selection , observation and measurement of nanoparticles
Copper nanoparticles as lubricating oils additives have good properties of anti-wear, friction
reduction and self-repair function[4] .
properties of lubricating oils containing nanoparticles WCu:WLa2O3-Ce2O3 Tribological properties WCu+ La2O3-Ce2O3 (%) 0.2 0.4 0.6 0.8 1.0 0:1 PB (N) 461 510 510 510 461 D(mm) 0.521 0.476 0.545 0.457 0.460 μ 0.0972 0.0953 0.0979 0.0893 0.1023 1:1 PB (N) 461 461 490 510 530 D(mm) 0.425 0.429 0.428 0.436 0.559 μ 0.0963 0.1013 0.0896 0.0934 0.1021 2:1 PB (N) 461 461 490 530 530 D(mm) 0.633 0.582 0.469 0.423 0.633 μ 0.1039 0.0975 0.0912 0.0875 0.1013 3:1 PB (N) 490 510 530 510 510 D(mm) 0.575 0.634 0.524 0.448 0.647 μ 0.0993 0.1001 0.1018 0.0973 0.1028 1:2 PB (N) 461 490 490 510 510 D(mm) 0.451 0.567 0.432 0.439 0.448 μ 0.0997 0.1010 0.0951 0.1047 0.0887 1:3 PB (N) 461 461 490 510 510 D(mm) 0.608 0.597 0.442 0.453 0.579 μ 0.1015 0.0939 0.0988 0.0993 0.0956 1:0 PB (N) 431 461 461 461 490(461) D(mm) 0.550 0.470 0.492 0.604 0.470(0.571) (0.571) μ 0.1103 0.0894 0.0915 0.1102 0.0879(0.0998) (0.0998) Note:The data
Cu nanoparticles and La2O3-Ce2O3 nanoparticles may fill in and repair the worn surfaces in the process of friction operation or chemical reaction, thus having the anti-wear and friction-reduction. 2.3 Application of combination of nano-additives in the diesel engine Table3 wear values of main friction pair using 40CD oil with nanoparticles and without nanoparticles(μm) Item Crankshaft Bearing Pad Bore Diamete of Connecting Rod Piston pin Piston Piston Ring(width) upper lower Large end Small end The first The second Oil ring 40CD Oil 23 18 43 56 66 57 3 90 70 70 40CDoil +nanoparticles 2 2 4 5 1 2 0 9 6 8 Wear Value Decrease(%) 91.3 88.9 90.7 91.1 98.5 96.5 100 90 91.4 88.6 Table 3 shows the contrastive test results between 40CD oil containing nanoparticles and 40CD oil, after 300 hours'wear in KDE5000E diesel engine.
properties of lubricating oils containing nanoparticles WCu:WLa2O3-Ce2O3 Tribological properties WCu+ La2O3-Ce2O3 (%) 0.2 0.4 0.6 0.8 1.0 0:1 PB (N) 461 510 510 510 461 D(mm) 0.521 0.476 0.545 0.457 0.460 μ 0.0972 0.0953 0.0979 0.0893 0.1023 1:1 PB (N) 461 461 490 510 530 D(mm) 0.425 0.429 0.428 0.436 0.559 μ 0.0963 0.1013 0.0896 0.0934 0.1021 2:1 PB (N) 461 461 490 530 530 D(mm) 0.633 0.582 0.469 0.423 0.633 μ 0.1039 0.0975 0.0912 0.0875 0.1013 3:1 PB (N) 490 510 530 510 510 D(mm) 0.575 0.634 0.524 0.448 0.647 μ 0.0993 0.1001 0.1018 0.0973 0.1028 1:2 PB (N) 461 490 490 510 510 D(mm) 0.451 0.567 0.432 0.439 0.448 μ 0.0997 0.1010 0.0951 0.1047 0.0887 1:3 PB (N) 461 461 490 510 510 D(mm) 0.608 0.597 0.442 0.453 0.579 μ 0.1015 0.0939 0.0988 0.0993 0.0956 1:0 PB (N) 431 461 461 461 490(461) D(mm) 0.550 0.470 0.492 0.604 0.470(0.571) (0.571) μ 0.1103 0.0894 0.0915 0.1102 0.0879(0.0998) (0.0998) Note:The data
Cu nanoparticles and La2O3-Ce2O3 nanoparticles may fill in and repair the worn surfaces in the process of friction operation or chemical reaction, thus having the anti-wear and friction-reduction. 2.3 Application of combination of nano-additives in the diesel engine Table3 wear values of main friction pair using 40CD oil with nanoparticles and without nanoparticles(μm) Item Crankshaft Bearing Pad Bore Diamete of Connecting Rod Piston pin Piston Piston Ring(width) upper lower Large end Small end The first The second Oil ring 40CD Oil 23 18 43 56 66 57 3 90 70 70 40CDoil +nanoparticles 2 2 4 5 1 2 0 9 6 8 Wear Value Decrease(%) 91.3 88.9 90.7 91.1 98.5 96.5 100 90 91.4 88.6 Table 3 shows the contrastive test results between 40CD oil containing nanoparticles and 40CD oil, after 300 hours'wear in KDE5000E diesel engine.
Online since: August 2011
Authors: Won Sang Lee, Nam Young Kim, Sung Jin Cho, Cong Wang
The circular TLM data indicated a ρc of below 10-5 Ohm • cm2 with a sheet resistance of around 400 Ohm/sq.
Accordingly, the double passivation schemes of Si3N4 / Si3N4 shows the reduction leakage current, the improve maximum saturation current density, the peak extrinsic trans- conductance with threshold voltage and the reduction sub-threshold leakage drain current relative than other passivation schemes.
Accordingly, the double passivation schemes of Si3N4 / Si3N4 shows the reduction leakage current, the improve maximum saturation current density, the peak extrinsic trans- conductance with threshold voltage and the reduction sub-threshold leakage drain current relative than other passivation schemes.
Online since: September 2013
Authors: Ying Xu Wei, Qiong Zhang, Cheng Pan
And savings of a small percentage in the operation represent a significant reduction in operation cost as well as in the quantities of coal consumed [4].
A regional coupled coal and power management system is proposed for demonstrating the method based on representative technical data from related literatures.
The results obtained from the model can generate decision alternatives which can help decision maker obtain optimal coal-blending schemes and coal-allocation patterns, and savings of a small percentage in the operation of a moderately large power system represent a significant reduction in operation cost as well as in the quantities of coal consumed.
A regional coupled coal and power management system is proposed for demonstrating the method based on representative technical data from related literatures.
The results obtained from the model can generate decision alternatives which can help decision maker obtain optimal coal-blending schemes and coal-allocation patterns, and savings of a small percentage in the operation of a moderately large power system represent a significant reduction in operation cost as well as in the quantities of coal consumed.
Online since: July 2006
Authors: D. Poleti, Z. Branković, G. Branković, M. Žunić
The starting composition M1 was chosen on the basis of our previous results [9], and the
compositions of other mixtures were determined with the intention to investigate the influence of
the reduction of dopant concentrations on the electrical properties, as well as to investigate the
processes taking place at the grain boundaries.
Mixture ρ/ρT [%] α Φb [eV] Eb [V/cm] M1 96.62 28 0.58 8547 M2 96.72 29 0.62 4414 M3 96.46 18 0.66 4879 M4 96.54 3 0.45 484 M5 96.54 18 0.47 1875 M6 96.80 16 0.42 1916 The obtained values of Φb (Table 2) in samples M1, M2 and M3 are sufficiently high and in accordance with the literature data reported for similar SnO2 varistor compositions [10,11].
Reduction of the dopants amounts below these values resulted in an insufficient quantity of dopants to reach a homogeneous distribution.
Mixture ρ/ρT [%] α Φb [eV] Eb [V/cm] M1 96.62 28 0.58 8547 M2 96.72 29 0.62 4414 M3 96.46 18 0.66 4879 M4 96.54 3 0.45 484 M5 96.54 18 0.47 1875 M6 96.80 16 0.42 1916 The obtained values of Φb (Table 2) in samples M1, M2 and M3 are sufficiently high and in accordance with the literature data reported for similar SnO2 varistor compositions [10,11].
Reduction of the dopants amounts below these values resulted in an insufficient quantity of dopants to reach a homogeneous distribution.