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Online since: July 2013
Authors: Lan Fang Yao, Jun Long Kang, Xin Pei Yan, Xiong Tang
The oxidation-reduction reactions that lead to the organic pollutants translate into CO2, H2O and some mineral acids occurs between electron–hole pairs and surface substance adsorbed by solid particle .
TiO2 possesses a wide band gap (~3.2 eV) so that its absorption edge occurs below 400 nm and only about 3~5% of sunlight can be utilized to promote the oxide to generate charge carriers which play an important role in the process of reduction and oxidation.
The calculated lattice parameters in comparison with available experimental datas are shown in Table 1[6].
Lattice parameters for anatase TiO2 Parameter Experimental data Calculation Deviation a [nm] 0.3780 0.3790 0.2% c [nm] 0.9490 0.9520 0.3% c/a 2.511 2.512 0.04% The band structure and density of states.
(a) PDOS of pure anatase TiO2 (b) PDOS of Y-doped anatase TiO2 Conclusions Compared with the experimental data, this calculating method is feasible, and calculating results are reasonable.
Online since: June 2006
Authors: Mohamad Kamal Harun, Stuart B. Lyon, M.Z.A. Yahya, S.N.A.S. Ismail
The results indicated that using 3-APS as surface pre-treatment prior to coating resulted in a significant reduction of total water absorption for alkyd on both mild steel and glass substrate.
These data are consistent with the known adsorption behaviour of 3-APS to steel, i.e. as an easily hydrolysed hydrogen-bond to the amine group, rather than as the more stable metal-oxide-silicon bond.
Thus each data point is represented by an average of thirty cross-cut test obtained from five panels.
Online since: September 2024
Authors: Mickael Fernandes, Moussa Aboubakar, Yasmine Titouche, Md Siddiqur Rahman, Ado Adamou Abba Ari
Moreover, the proposed framework allows resource allocation and a reduction of the total power consumption of cloud data centers (DCs).
This task corresponds to the transformation of raw data into more suitable data for modeling.
In general, it involves operations such as data cleaning, feature selection, data transformation, feature engineering, and dimensionality reduction.
In particular, one week's data was extracted from the Europe/Brussels time zone data. 5.
Energy-aware scheduling schemes for cloud data centers on google trace data.
Online since: June 2013
Authors: Michael D. Todd, Zhu Mao
(“baseline” can also mean linear, or any reference condition designated the null hypothesis) or ‘…from data derived from a different (“test”) condition.’
The comparisons are facilitated through computation of receiver operating characteristics (ROCs), which are data-driven methods for comparing detection rates to error rates as a function of decision boundaries established between data distributions, independent of the actual underlying distribution.
Fig. 1: Surrogate plate structure Transmissibilities for both undamaged and damaged condition are evaluated given the data generated from structure in Fig.1.
However, in the context of damage diagnosis and structural health monitoring, we need to capture changes in features, i.e. baseline features (feature evaluation between two undamaged cases) and damaged features (evaluation between damaged data and undamaged data).
Piersol, Random Data: Analysis and Measurement Procedures (2nd Edition), John Wiley & Sons (New York), 1986 [4] Z.
Online since: June 2013
Authors: Ai Jun Yan, Rui Liu, Na Li, Xiao Hua Tang, Lei Liu, Zhi Zhong Li, Jing Yi Du
As for this, in the paper [7][8], field test data of corrosion were collected and a corrosion forecasting model was built by methods of BP artificial neural network.
The flow chart of the gradual optimization algorithm flowchart based on a neural network Case Analyses Principal Component of the Sample Data Analysis. 35 groups of sample data of carbon steel soil corrosion in different sites were selected.
In such manner, the dimension of input data was effectively reduced and 4 finally unrelated principal components were generated as the output samples of the neural network forecasting model.
(2) The 33 groups of data were divided into 11 groups randomly with K-fold Cross Validation.10 groups were taken as training data and the last one as validation data each time.
Selected the last 2 groups of data extracted by PCA as the test data, and used the ninth optimized neural network model to forecast the corrosion rate.
Online since: November 2011
Authors: Hui Lin Shan, Jia Qiang Li, Jie Zhou, Yin Sheng Zhang
Analysis of experimental results In the Matlab environment, IRIS data set in UCI database is adopted.
IRIS data set contains four properties and 150 data objects, which can be divided into three classes.
There are 121 data after eliminating duplicate data.
Only seven isolated points need eliminating because IRIS data set is standard.
Experiments show that the output code is correct according to the geometric features of input data.
Online since: March 2012
Authors: Dong Chen, Bao Ku Xiong
Our calculated lattice constant is in agreement with the theoretical results and available experimental data. γ-Si3N4 can be used as anti-reflection coatings in the energy range of 10eV~21eV due to high reflectivity.
Results and Discussions Our calculated zero pressure lattice constant a=0.7773 nm, which is in agreement with the theoretical value (a=0.7837 nm [7]) and the experimental data (a=0.7744 nm [13]).
The maximum relative error between our result and these data is only 1.3%.
The peak of the loss function corresponds to the trailing edge in the reflection spectrum and is observed at 22eV corresponding to the rapid reduction of the reflectivity R(ω).
Online since: September 2014
Authors: Yue Ming Dai, Shu Yun Qiao
The control circuit online identify important critical frequency response characteristics of process object through input and output data in the normal process operation, and then the system online update PID controller parameters based on Ziegler - Nichols tuning rules or by the improved method.
The comparison of two kinds of PID control algorithm Because position type PID controller adopts total output, it’s output is the actual position of the actuator and each output is associated with the past state and calculation of deviation accumulation.So large amount of calculation work must do, once the data processing computing chips appear problem, the system will make the output volatility, and result in high volatility in the actuator, that causes big accidents.
According to the experience formula of following table and the corresponding controller type set corresponding PID parameters, and then conduct simulation validation and fine-tuning: Tab.1 Experience formula The controller type characteristic data PID 0.6 0.5 0.12 For the transfer function of a given controlled object, we select the intersection point between root locus diagram of discrete system and z plane unit circle on the root locus diagram, then we gain gain Km and this point value namely.
It is of great significance for industrial enterprises the energy-saving emission reduction and improving the operation efficiency of process equipment.
Online since: January 2021
Authors: Geetha Manivasagam, Nageswara Rao Muktinutalapati
Such unfavourable aging treatments may adversely affect not only the static properties such as reduction in area and elongation in a tensile test, but also dynamic properties such as impact toughness.
The authors would present the foregoing analysis, based primarily on the wide-ranging researches they carried out on beta titanium alloy Ti15-3 and to some extent data published by researchers on other grades of beta titanium alloys.
Ivasishin et al. [13] carried out preaging at 300 oC for 8 h followed by aging at 450 oC and 538 oC of the Ti15-3 alloy and obtained an improvement in proof strength (PS) and ultimate tensile strength (UTS) coupled with an improvement in % elongation (% El) and % reduction in area (% RA) values, compared to single step aging. 2.2.2 Effect of rate of heating to aging temperature During the aging treatment of metastable β titanium alloys, heating rate adopted to attain the desired temperature plays an important role in α precipitation [14-17].
But the tensile ductility shows a phenomenal increase with reduction in area increasing from 1 to 21% and elongation increasing from 1 to 8 % with grain size dropping from 400 to 60 μm.
Βeta grain size (μm) 0.2 % Proof stress [MPa] Ultimate tensile strength [MPa] % elongation % Reduction in area 400 1275 1335 1 1 60 1275 1350 8 21 Grain growth is a problem during super solvus solution treatment of metastable β titanium alloys.
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.
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