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Online since: May 2004
Authors: Pilar Miranzo, María Isabel Osendi, E. García
Once the pattern was recorded, the surface was removed by gently grinding and the thickness reduction measured with a micrometer with an accuracy of ±0.001 mm.
The reduction reaction of cordierite during the combustion to form spinel is thermodynamically favourable in complete consonance with the experimental data.
Online since: June 2004
Authors: Vito Raineri, Lucia Calcagno, Paolo Musumeci, Francesco La Via, Fabrizio Roccaforte, Marco Mauceri, Alfonso Ruggiero
This level causes an increase in the net electron concentration, thus leading to the formation of the ohmic contact on n-type SiC through the reduction of the depletion layer width.
Literature data [8-9] related the formation of ohmic contact in Ni/SiC to the metal reaction and to the carbon redistribution during the reaction.
When the current transport across the ohmic contact is due to the thermoionic field emission mechanism, the presence of the low Schottky barrier regions can produce a large reduction of the specific contact resistance.
Online since: May 2011
Authors: Jun Yan, Zhi Yao Liang, Yi Wen Yu
Take Changsha area as an example, this paper will analyze the influence of the K values and D values on heat insulation performance of the wall ,and discussed their optimal combination Calculation used climate parameter data According to Thermal design code for civil building (GB50176-93) , palisade structure summer outdoor temperature and solar radiation conditions in Changsha show in table 1.[1] Table 1 Changsha sunshine radiation intensity table(W/m2) Towards Local solar time Radiation amount The average day and night 6 7 8 9 10 11 12 13 14 15 16 17 18 S 16 48 79 106 184 236 254 236 184 106 79 48 16 1592 66.3 W/E 16 48 79 104 123 134 138 345 518 629 651 561 341 3687 153.6 N 124 159 141 104 123 134 138 134 123 104 141 159 124 1708 71.2 H 77 272 493 697 860 964 1000 964 860 697 493 272 77 7726 321.9 Changsha summer outdoor calculated temperature for: average temperature = 32.7 ℃; maximum temperature = 3.79℃; the amplitude = 5.2℃.
Coefficient K [W/(m2.K)] Thermal Inertia Index D Maximum Temperature [℃)] The Time of Appearance 38.1 0.55706 1.5 38.70 17:30 86 0.83693 2.0 38.41 17:45 154 1.11996 2.5 38.09 17:45 240 0.112 1.39813 0.5 3.0 37.87 17:40 346 1.67872 3.5 37.73 17:30 471 1.95863 4.0 37.66 17:25 56 0.81873 1.5 39.13 17:35 127 1.23296 2.0 38.71 17:55 225 0.165 1.64112 0.7 2.5 38.28 18:00 352 2.05267 3.0 37.96 17:55 508 2.46592 3.5 37.77 17:40 691 2.87599 4.0 37.67 17:30 87 1.27017 1.5 39.13 17:35 196 1.90648 2.0 38.71 17:55 349 0.255 2.54399 1.0 2.5 38.28 18:00 546 3.18199 3.0 37.96 17:55 786 3.81781 3.5 37.77 17:40 1071 4.45654 4.0 37.67 17:30 150 2.1933 1.5 40.73 17:50 339 3.29726 2 39.78 18:10 603 4.39756 2.5 38.87 18:20 950 0.441 5.51968 1.5 3 38.25 18:15 1359 6.6018 3.5 37.90 18:05 1851 7.7047 4 37.69 18:00 Fig. 1a and Fig. 1b indicates that ,in natural ventilation condition, Wall inside surface temperature is not quite as D value increase or K value the reduction
of continuous reduction.
Online since: November 2012
Authors: Chun Mei Wang, Ye Jian Qian, Li Jun Ou, Hui Chun Wang, Su Wei Zhu
These processes have been shown to be successfully modeled by the use of chemical kinetic rate constants and reaction data for specific reaction scheme governing the auto-ignition of the fuel.
With the reduction in LTHR, it takes a relative long time to accumulate energy and initiate the main combustion.
The reduction in OH formation with the increase of ethanol addition during low temperature reaction directly results in the decrease of CH2O production and H2O2 formation (see fig. 3b and fig. 3c).
Online since: March 2018
Authors: Ilie Dumitru, Alexandru Dima, Alexandru Oprica, Ana Maria Nicu, Diana Camelia Staicu
The objective of the study was the reduction of the pressure drop in the exhaust system [8].
The intake manifold was optimized by CFD software obtaining an increase of 13% of air flow and a reduction of smoke level [9].
Fig.2 CAD model of the throttle body Results Based on the mass data provided for each component used, the material densities were calculated.
Online since: March 2010
Authors: Jia Bao Wang, Zhan Shu He, Ya Jun Liu, Jun Liu
Meanwhile, after detected by pressure transducers and sampled by the data acquisition card, the pressure signals at the pump inlet, the pump outlet and the flowmeter outlet are transmitted to the computer and processed. 1 4 5 6 3 7 2 5 5 Fig.1.
As shown in Fig.5, water hammer peak pressure decreases with the reduction of the stiffness coefficient of the main valve spring, which agrees well with Eq.(1).
Fig.9 shows the amplitude variation of the frequency spectrums under different suction pressures after autocorrelation noise reduction. these frequency spectrum amplitudes have a remarkable change when suction pressure is -0.04 Mpa.
Online since: April 2007
Authors: Xiao Ning Zhang, Fan Yong Ran, Yan Hong Li, Wen Bin Cao
Since Fujishima [1] found the excellent photocatalytic activity of nanosize anatase TiO2 in 1972, the degradation of water pollutants [2,3], antibacterial [4] and reduction of NOx [5] by anataseTiO2 nano-powders have attracted more and more attentions.
That leads to the reduction of the growth rate of TiO2 crystallines and the decrease rate of specific surface area.
Experimental data shown in Fig. 4 proves that very well.
Online since: December 2011
Authors: De En, Jie Yu Feng, Ning Bo Zhang, Xiao Bin Wang, Ning Ning Wang
Micro-sensor also refers to an integrated sensor, and such sensor encapsulates tiny sensitive element, signal processor, data processing devices on a chip to form an integrated sensor.
Size reduction also brings weight reduction, and the weight of micro-sensor is generally a few grams to the tens of grams.
Online since: September 2011
Authors: Pailyn Thongsanitgarn, Sakprayut Sinthupinyo, Watcharapong Wongkeo, Arnon Chaipanich
Technical development to lower the environmental impact of cement production achieved by the reduction of cement demand (blended cement).
The replacement of Portland cement by limestone powder caused a reduction in the compressive strength that can be explained as a result of cement dilution effect.
The following conclusions can be drawn from the obtained experimental data: · The compressive strength of Portland-limestone cement pastes decreased in all ages with an increasing amount of limestone due to the dilution effect
Online since: December 2012
Authors: Juan Wen, Wen Tao Chang, Peng Fei Shi, Tao Sun
Compared with traditional Chinese industrial parks, hi-tech eco-industrial parks have shown advantages in industrial structures, techniques, energy use structure, energy consumption and carbon emission per unit of GDP, pollutants reduction and park management.
Qualitative Factor Decomposition Analyses include Structure Decomposition Analysis (SDA) and Index Decomposition Analysis (IDA) [1].In most studies, time-series data were analyzed quantitatively and qualitatively based on these methods.
Energy efficiency has helped reduction of the carbon emission, which has been confirmed by Wei et al , in which LMDI method was used to compute the energy use of the first industry between 1980 and 2005[6].
Showing 15371 to 15380 of 40357 items