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Online since: November 2011
Authors: Wei Jun Yang, Yan Wang, Peng Xiao Jiang
The paper researched the influence of ceramsite pre-wetted time upon concrete working performance based on the analysis of the experiment data, which included the slump and delamination degree of concrete on the condition of not pre-wetted, pre-wetted 1h, and 24h.A reasonable per-wet time of ceramsite before ceramsite aggregate concrete for construction is summarized as well.
Fig. 1The influence of pre-wetted time upon ceramsite aggregate concrete performance As illustrated in Fig. 1, the density and guality layered degrees of pre-wetted ceramsite aggregate concrete has a significant reduction from that of non-pre-wetted one.
But the time 1h after and 24, the reduction is not very obvious.
Online since: June 2010
Authors: Tomasz Merder
From the data shown in Table 1, one can notice an increase in dispersion plug flow share (configurations C & D).
The most unfavorable contribution of flow shares exist for configuration B, where the mixed flow share has increased at the cost of a reduction in the plug flow share.
The analysis of results of computations and numerical simulations enables the following conclusions to be drawn: 1) The use of turbulence controllers (with different geometries) in the working space of the facility under consideration significantly influences the values of particular steel flow shares within the whole tundish volume. 2) The proposed configurations of tundish working space furnishing result in a reduction of the liquid steel residence time, which positively develops the casting conditions. 3) An optimal tundish configuration is characterized by an increasing plug flow, with a decreasing dead flow.
Online since: September 2013
Authors: Mohd Nazree B. Derman, M.R. Jeffry, R. Kumar
Figure 1: Tafel plot of Al-Ni-Cu Alloy From the plotted graphs and data obtained (Fig. 2), corrosion rate of the samples can be calculated by using following eq 1.
At Ecorr, the oxidation of metal and reduction of the species in the solution is taking place at the same rate where the net measureable current is zero.
While, icorr is the current density at Ecorr representing the total of the oxidation current and reduction current that is in equilibrium.
Online since: November 2010
Authors: Wen Shen Wang, Chen Huang
In practical control system, output torque of motor may be represented as , (11) where, Km is torsional stiffness coefficient of motor; G is reduction ratio of motor reduction gear.
Fig. 6 Step response of V when distance sensor failure occurs Fig. 5 Step response of V when throttle sensor failure occurs Fig. 4 Step response of V when speed sensor failure occurs Simulation and results analysis To the above-mentioned acc model, data processing and iterative analysis is carried out by matlab, fault-tolerant feedback control matrix is obtained.
Online since: January 2012
Authors: Ying Zhou, Lei Hong
Seismic Performance Evaluation of A Super-tall Building Structure Ying Zhou1, a, Lei Hong2, b 1 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, 200092, China 2 Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai, 200092, China ayingzhou@vip.163.com, bjx_honglei@163.com Keywords: super-tall building structure, performance objectives, seismic evaluation, dynamic analysis Abstract.
Table 1 Analytical results of the structure Programs SATWE ETABS Total weight (t) 293539 292700 Natural period (s) T1=5.6711 T2=4.9911 T3=3.2392 T1=5.4960 T2=4.7141 T3=3.2298 Maximum Inter-storey drift X dir 1/691 X dir 1/703 Y dir 1/618 Y dir 1/580 Maximum top displacement (mm) X dir 266.3 X dir 253.5 Y dir 319.4 Y dir 310.5 Base shear (kN) X dir 49694 X dir 55000 Y dir 44197 Y dir 46786 All the data indicate that the results of the two programs are very close, and the comparison validates the correction of the analytical model.
Online since: June 2013
Authors: Chun Jie Wang, Bo Xiang Xin
Image noise reduction The noise will prevent people received correctly image information from sensory organs, due to various reasons in the actual, the collected image will inevitably be noise pollution [2], and produce some pixels which not belong original image.
Finally we decided to use median filtering method to do image noise reduction.
Specific steps are as follows: (1) Properly connected emulator and image data acquisition card, reset the DSP
Online since: January 2013
Authors: Yang Zhao, Zhong Qing Jia, Guo Rui, Jian Ma, Jiang Feng Song, Ji Hua Sun, Shuai Liu
Signal processing Noise reduction is a permanent topic for engineers and applied scientists.
The method of wavelet threshold is one of most powerful method for noise reduction.
This approach is accomplished by applying a discrete wavelet translation (DWT) to the data firstly.
Online since: June 2017
Authors: Duongruitai Nicomrat, Wannaphan Janlapha, Nuanchan Singkran
There were reduction of the fungus growth on the plate culture, as shown to be the diameter decreases in the fungus treated with AgNPs at various concentrations from 0 to 100 ppm.
The results was correspondent to the positive controls, fungus P. oryzae culture reduced their growth while the concentration of tricyclazole increased from 25 mg/l to 200 mg/l (data not shown).
The MIC values determined were from the fungal growth weight loss in broth and the colony diameter (mm) on agar and calculated at 50% reduction compare to the control.
Online since: July 2012
Authors: Shan Shan Liu, Li Li Wang, Lin Yuan
The final data on the purification of the BAAP are summarized in Table 1.
When varying the pH of the reaction mixture, this caused a reduction of the catalytic activity (Fig. 2).
However, a progressive reduction was observed when decreasing the alkalinity of the reaction mixture towards neutral, indicating a robust nature within a pH range of 7.0~12.0 (Fig. 3).
Online since: October 2007
Authors: Lyudmila Ryabicheva, Dmytro Usatyuk
Such approach is efficient only in case of large number of experimental data in investigation of plastic deformation at different temperatures and strain rates.
Depending on the value of K the possible case is reduction or grain growth (Fig. 3).
Summary The model with taking into account growth rate of recrystallized grain and possibility of its reduction or growth was created.
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