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Online since: February 2014
Authors: Gabriel Ferro, Fabrizio Roccaforte, Filippo Giannazzo, Véronique Soulière, Marilena Vivona, Kassem Al Assaad
From a fit of the experimental data in the linear region, it was possible to determine the ideality factor n and the Schottky barrier height FB, as function of the temperature.
This plot of the experimental data is shown in Fig. 4, in which the straight line represents the ideal behavior of a Schottky barrier (n=1).
In addition, the experimental data taken from Ref. [8] are reported in the same graph as a reference.
A good agreement between the experimental data and the theoretical model is obtained with a T0 value of 40K, slightly higher than the value reported in Ref. [8] for the commercial material.
For comparison, the literature data acquired on commercial material are also reported (taken from Ref. [8]).
Online since: January 2012
Authors: Zeng Tao Xue, Zheng Li
Fuzzy neural network-based systems make fuzzy systems with limited training data to achieve the automation of the modeling process, which has learning functions and adaptive capabilities.
Based on the production process and field sampling data analysis and operator’s experience, it can be derived: when the kiln rotation speed increases, the temperature decreased slightly in the normal production process, the kiln speed remained unchanged [4, 5].
As the structure of fuzzy inference neural network training expectations of input and output data is unknown, in order to optimize the parameters of the network training, the fuzzy neural network controller and the controlled object in series to form a closed loop negative feedback control system.
Based on the above training data of real system, more than 1000 sets data points are used for training the neural network model.
[2] Mujumdar K S,Arora A,Ranade V V: Modeling of Rotary Cement Kilns: Applications to Reduction in Energy Consumption, Ind.
Online since: August 2011
Authors: Bao Yong Zhang, Xia Gao, Qiang Wu
Therefore the reduction in CH4-emissions will be beneficial in terms of avoiding global warming; CBM is a clean source of energy of high quality, and through CBM development and utilization, we can reduce the dependence on unclean energy such as coal and expensive oil, and rationalize the energy mix; surface extraction will reduce the gas content in coal beds, and as a result reduce mining tragedies during the coal production caused by gas explosions and will lead to a safer and more productive coal exploitation.2 Therefore, it is very important and urgent to develop a new technique for the wide application in CBM separation and for the safe storage and transportation.
It mainly consists of a visual cylindrical high-pressure cell (150.0 ml in volume), a thermo-tank, a gas pressing system, a data logger system and a CCD image system.
The thermodynamic and parameters of hydrate formation, associated with the hydrate images, can be recorded by data logger system and CCD image system.
(4) Cool the thermotank; collect pressure data during hydrate formation with respect to time and store them by a data logger system to calculate hydrate formation rates; turn on the CCD image system to record the data and image in hydrate formation process
Online since: November 2012
Authors: Faizal Mustapha, Mohamed Thariq Hameed Sultan, Dayang Laila Majid, Hafiz Hanafi, Mohd Norhasani Abdullah Sani
The main tasks were to appropriately mount the transducer at the designated location, acquiring vibration data using modal testing technique, analyse the acquired data and store the vibration response data using the robust Bruel & Kjaer Signal Analyser and finally deduce the resonance frequency of the designated flat plates pecimen.
The roving hammer technique with fixed transducer was used to collect the data of FRF measured.
Coherence is a function use as data quality assesment.
There appears to be a reduction in the natural frequencies of mode 1, 2, 4 and 5 from 00 to 450.
Online since: November 2012
Authors: Adrian Olaru
The angular velocity matrix and the inertial tensor reduced at the disk axis with reduction system with raport ired will be: (6) The movement step in each axes will be: (7) where tX, tY, tZ are the integration times, what can be different in each axes.
Part of the block schema of the LabVIEW instrument for the assisted research of the direct kinematics problem of the satellite and the data of the driving axis Fig.7.Exemple of the calculus of the direct kinematics data and the obtained errors Fig.8.
Front panel of the virtual instrument with the results after were changed the target data.
The conclusion from this research was that the more important parameters to obtain the quickly convergence process are: the target data of the hidden layer; the step of the time delay and the position to apply them; the recurrent links and the position of the closed loops; the amplifier gain; the teaching gain.
Simulation results of the space trajectory when was changed the velocity values and the type of the simultaneously or succeed movements network was 3-8-3-3 according to the input data and direct and inverse kinematics and dynamics input and output, what was necessary to be 3.
Online since: February 2014
Authors: Na Sui, Zhen Yang
Data are means of 5 replicates (n=5) ± SD.
Data are means of 5 replicates (n=5) ± SD.
Data are means of 5 replicates (n=5) ± SD.
Data are means of 5 replicates (n=5) ± SD.
Data are means of 5 replicates (n=5) ± SD.
Online since: October 2014
Authors: Le Yang, Gang Cai, Zi Xing Mo, Xiao Long Lu, Li Peng
The main purpose of PCA method is to project high-dimensional data into a low-dimensional space, and it can also reduce the dimension and eliminate the correlation of data.
Fisherface method combines PCA method and LDA method for dimensionality reduction, making the within-class scatter matrix nonsingular, but some useful discriminatory facial image information may be lost[6].
So the the optimal projection matrix can be expressed as[9]: (8) where (9) (10) The projection transformation is used twice by this method to process the original image data.
Firstly, the projection transformation is used by PCA method to project high-dimensional data into a low-dimensional space.
But the recognition rate of Fisherface method is nearly 100%, to a certain extent, the less training data and single database may make a recognition result that is not very inaccurate. 7.
Online since: June 2014
Authors: Xing Qin, Bao Kui Gao, Wei Wang
To the case of bottom close-in, using basic data above, and let inner tubing pressure and annular pressure be zero at wellhead.
Corresponding to the case of downhole close-in, using the basic data above, and let the inner tubing fluid be natural gas, the effect of annular pressure and annular fluid density on helical buckling length is shown in Fig.3.
The following data comes from testing design of Well PY5-8-1.
a) String structure Above mud line:5"(Φ127mm) drill pipe, length 120m; From mud line wellhead to slip joint:5"(Φ127mm) tubing, length 4050m; From slip joint to packer: 4-3/4"(Φ120.65mm) drill collar + function valve+ data record apparatus and so on, length 170m; Below packer:2-7/8"(Φ73mm) tubing + perforation equipment and so on, length 60m.
Pressure, density and temperature of formation fluid are the basic data of string safety design, while annular liquid density, cushion density and tool operation pressures can be selected.
Online since: August 2014
Authors: Guo Qin Liu, Wen Bo Wan, Li Juan Han, Xin Qi Liu
The appropriate parameters measured by using power-law equation to fit the experimental data, which were used to analyzes the effect of organogelators ratio, storage temperature and time on the oleoge.
Data were average of two runs Table 1 The consistency coefficient and the power law index of the apparent viscosity of different organogelators ratio Organogelators ratio[S:L] Consistency index K [Pa﹒s] Power law index [n] Correlation coefficient 0:10 12.18 0.31 0.9917 7:3 370.78 0.07 0.9991 10:0 188.87 0.04 0.9980 The changes of viscosity related to the transformation of its microstructure.
Obviously, more stable and firm contract between crystals could increase the viscosity of oleogels, which is in accordance with our data.
Effect of storage temperature According to the datas presented in table 2, The n value decreased as temperature increased, suggested the pseudoplastic of oleogels increased with temperature.
Data were average of two runs.
Online since: August 2019
Authors: Lia Ferrari
In this regard, the temporariness of the securing intervention highlights a strong vocation for reversibility, that is particularly appropriate when operating on cultural heritage in compliance with the principles of restoration (reversibility, compatibility, minimum intervention, recognizability), as recommended in the guidelines for "evaluation and reduction of seismic risk of cultural heritage with reference to the Technical Standards for Construction "- DPCM 9/2/2011 [1].
For example, the provisional devices mostly used in the past, the wooden rakers, entailed some downsides: they encumber large spaces in front of the structure and present difficulties of construction, impossibility to reuse the material, loss of effectiveness in facing new shocks and reduction of the efficiency of the material over time [2].
The comparison between the data collected before and after the installation of the scaffolding allowed to verify the effectiveness of the interventions for securing this macro-element.
For example, a comparison between the cost of the scaffolding installed to secure the southern transept of the Church of Jesus and the cost of the hooping made for the safety of the north transept (less damaged and with minor deformations than the southern one), shows a reduction in costs in the latter case.
Moreover, its progressive diffusion and the introduction of new composite materials has allowed a considerable reduction in costs.
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