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Online since: May 2011
Authors: Shu Gen Liu, Yan Yan Zhang, Nan Wen Zhu, Jie Hong Cheng
Autothermal thermophilic aerobic digestion (ATAD), a kind of special aerobic digestion, is capable of achieving a high degree of stabilization and pathogen reduction to produce Class A biosolids under the condition of a thermophilic temperature (45~650C)[2,3].
Accordingly, the objectives of this study were to investigate sludge stabilization and reduction by indexes of VSS, TSS and auto-rise temperature.
The ATAD system used an on-line oxidation-reduction potential (ORP) as an indicator of the aerobic character.
The indicators were determined as the test data.
Online since: September 2007
Authors: Shun Li Che, Lei Li, Wei Zhao, Shan Suo Zheng, Guo Zhuan Deng
The influence of the bond-slip on bearing capacity lies with the interfacial bond softening phenomena caused by the progressive reduction of the shear transfer capacity.
With further loading, the softened zone grows in size and relative slip increases, leading to continual reduction in slope of the strain versus distance near the pulled end.
(1) Where, coefficient 1k and 2k respectively describe the linear increase and reduction of the bond stress with sliding.
For this purpose, a set of experimental data obtained by our research group is employed [2, 3].
Online since: October 2012
Authors: Shou Ping Shang, Hao Zhou
According to the shaking table experiments on seismic isolation layers made in various operating mode, the dynamic characteristics, relative displacement and acceleration reduction with different layer height and input acceleration amplitude were investigated.
It is to be mentioned that more reduction occurs with increasing layer height and input acceleration amplitude.
The test result indicates that the acceleration reduction coefficient of crosswise is 57.6%, while 66.6% of the lengthwise, which is basically consistent with proposed data.
Online since: June 2014
Authors: Nor Maria Adam, A. Zainuddin, I.H. Rusli, Qi Jie Kwong
The air temperature profile in Figure 6 shows that the air temperature at the occupied zone is between 30 °C and 39 °C of which a reduction is observably achieved compared to the benchmark condition.
A desirable reduction in air temperature was observed, as can be seen in Figure 8, was simulated for this case whereby the average air temperature was simulated to be between 29 °C and 35 °C.
In addition, Figure 9 reveals that average air velocities for the simulated area see a favorable reduction to between 0.1 and 1.2 m·s-1.
Fig. 11: Air velocity profile at y = 1m for 3rd modification model Conclusion Based on the data gathered and simulations performed, the placement of an additional air-conditioning unit in the cafeteria has the pronounced potential for reducing the air temperature to a more thermally-acceptable level.
Online since: July 2014
Authors: Liu Qing Tu, Ming Qiang Qin, Zun Yun Li
In the beginning, active corrosion was defined as having commenced if, for two consecutive data acquisition periods, the macro-cell current was 10 μA or greater, or the electrochemical potential for the top bar was -350 mV vs.
Another research studies indicate a reduction in the compressive strength by the use of organic corrosion inhibitors as an admixture, for amine-based inhibitors, for amino alcohol-based inhibitors and for another organic inhibitor by 10-30% [11-14].
One was the reduction of the penetration rate of chlorides (as suggested by lower estimated chlorides diffusion coefficient), and the other was an increase in the critical chlorides threshold for the occurrence of localized corrosion.
The increase of time-to-corrosion is due to both an increase of the critical chloride threshold and to a reduction of the chloride diffusion coefficient
Online since: December 2013
Authors: Abdul Mutalib Leman, Amir Khalid, Rizalman Mamat, Mohd Hafizil Mat Yasin, Noreffendy Tamaldin
Most results study indicated a significant change with an increase in NOx emissions for biodiesel-ethanol-diesel blends when operated with the used diesel engines while in an isolated study found a reduction in NOx emissions when operated with new engines [10].
Specification of test engine Engine Specification Details Number of cylinders 4 in-line Combustion chamber Swirl chamber Total displacement cm 1.998 cc (121.925 cu. in) Cylinder bore mm x Piston stroke mm 82.7 x 93 Bore/stroke ratio 0.89 Compression ratio 22.4:1 Both pressure transducer and crank angle encoder were recorded through a Dewetron data acquisition (DAQ) system installed in a Windows XP based PC, DEW-5000 combustion analyser. 19 K-type thermocouples were used to measure the temperatures of the engine include all the exhaust manifolds.
As higher ethanol concentration in the biodiesel blends, the cooling effect of the ethanol becomes more dominant which produces lower combustion temperature and a significant reduction in NOx emissions.
This would be due to the content of the ethanol which could improve the combustion and lower CO emission when mixing with smaller ethanol concentrations, but could lead to the gas temperature reduction.
Online since: February 2015
Authors: Amamer Musbah Redwan, Khairiah Haji Badri, Mou’ad A. Tarawneh
The figure shows that the hardness of MDF is slightly decreased (4-11% reduction) with the presence of ATH.
The impact strength of the EFB-MDF decreased linearly with the ATH content with an average reduction of only 13.4% up to 15 wt% ATH.
As described in previous section, the ATH-ATH and ATH-PU encapsulated systems have been the major factor in causing reduction in the mechanical properties.
Fig. 4 SEM micrographs of (a) EFB-MDF and EFB-MDF filled with (b) 5 wt% ATH(c) 10 wt% ATH (d) 15 wt% ATH Conclusion These data support the important of compatibilizing the filler with the matrix.
Online since: July 2018
Authors: Wolfgang Schlüter, Andreas Buswell
Extension of an Existing Material Flow and Energy Model The model described in [8] was created and validated based on data of plant A.
This observation was confirmed by both measured data as well as simulation results of the validated [7] CEM.
Instead they need to be determined using various optimization methods, combined with measurement data or simulation results provided by the CEM.
Nonlinear Least Squares for gradient based optimization) The parameters of the SEM were optimized on the basis of measurement data and data retrieved from the CEM.
In the actual plant, these reductions could be realized through improved maintenance.
Online since: January 2011
Authors: Ying Xie
Relative data is collected from National Bureau of Statistics of China.
Data analysis shows the proposed models, especially based on LS-SVMs, have more steady performance and higher accuracy.
We are given the training data set of d points, Here is the i-th m-dimensional feature vector obtained from the above data mining by PCA and inputted into the LS-SVM regression model for training and forecasting, d is the sample number of training dataset.
The output data zi∈R assumed as the construction worker scale.
,in: Credit Scoring using Least Squares Support Vector Machine based on data of Thai Financial Institutions.
Online since: August 2013
Authors: Rui Tian, Hong Song, Chun Ling Sun
(2) Data transformation processing Data transformation processing principle is used to unqualified sequence.
After the data transformation processing under the cover, it is able to get high precision of GM (1, 1) model
(6) The use of model prediction After setting up GM (1, 1) model by residual test proof enough accuracy, the data can be forecasted and we can get forecast point after several adjacent period accumulated unfinished project cost Combine GM (1, 1) prediction and network technology to propose control scheme The accumulative total cost data obtained by the GM (1, 1) and network technology data are compared.
We find out: , If n=3, the contact does not satisfy the coverage, it needs the original sequence for data processing
(2) Data transformation processing Using root to process data, It can fit, the sequence can be made into GM (1, 1) modeling
Showing 14061 to 14070 of 40699 items