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Online since: October 2014
Authors: Jason S.T. Sim, M.F.Mat Tahir, Rozli Zulkifli, A.K. Elwaleed
The program SB8001 was used to extract the data from the Symphonie Data Acquisition unit and display the data as Noise Reduction Coefficients.
Table 1 shows the results of the porosity testing and the values of the noise reduction coefficient at the octave band frequencies required to calculate the average noise reduction coefficient.
However, its noise reduction coefficient was reduced at frequencies below 900 Hz.
Based on experimental data, the NRC was low at frequencies below 900 Hz, but rose significantly after 900 Hz.
An increase in porosity increases the noise reduction coefficient for the higher than 900 Hz frequency range, but decreases the noise reduction coefficient in the lower than 900 Hz range.
Online since: August 2024
Authors: Gennadi Polisski, Mathias Isacson, Björn Magnusson, Jimmy Thörnberg, Egidio Carria
Electrical data is analyzed and deviations in the ΔV signal are compared with defectivity observed by the optical surface detection system with UV-PL capability.
Reliable statistical data of the relationship between decreasing voltage and defect classification show good detection of triangles and several other defects in the epitaxial layers.
The data is collected on 25 wafers of 200 [mm] 4H-SiC with n-type SiC epitaxial layers.
Logarithmic distribution of defectivity with overlapping voltage leakage sites, see Tab. 1 for corresponding data.
The data from QUAD and UV-PL do not correspond one to one and UV-PL gives more detections.
Online since: June 2013
Authors: Hamid Garmestani, Gilberto Alexandre Castello-Branco, Cristiane Maria Basto Bacaltchuk, Luciano Santos Constantin Raptopoulos, Iuliana Dragomir-Cernatescu
The peak profile analysis data and the self-consistent predictions of texture evolution showed a good agreement with the experimental deformation texture evolution.
Other advantages are the “easier” sample preparation routine, relative short time required by the “state of the art” equipments to render results and the fact that the data obtained is statistically averaged over the area/volume irradiated.
The rw1 data files generated by the Philips software were converted into raw archives, recognizable by PopLA [6), using PC-Texture 3.0.
The profile data acquisition was done using a solid-state position-sensitive ultra-fast detector (X’Celerator, Panalytical).
The initial texture, corresponding to the As-received material, consisted of a file with a set of grains orientations extracted from the SOD file (sample orientation distribution) obtained from the X-ray data for pole figure measurement using the routine PoPla (Preferred orientation package Los Alamos).
Online since: November 2019
Authors: Mohammad Shamim Miah, Md. Jihad Miah, Md. Ashik Hossain
The scaled El Centro 1940 earthquake data is used as input excitation.
In order to evaluate the performance of the newly developed TMD, dynamic tests are performed by employing scaled El Centro 1940 earthquake data [8].
Input excitations: (a) original El Centro 1940 earthquake data, (b) scaled data for 20 sec and (c) scaled data for 25 sec Herein the scaled El Centro 1940 is employed due to the existing laboratory setup.
The input excitation such as El Centro data remains same as experimental tests input (see Fig. 6) for the simulations.
Along with the full-time history, a zoomed view of 0-5 sec are also provided for better visualization of the data.
Online since: January 2021
Authors: Herbert Danninger, Milad Hojati, Christian Gierl-Mayer
According to the data, the masteralloy-including mix showed higher shrinkage at 1100 and1300°C which suggested better sintering activity especially at high temperature.
The results of oxygen measurement shows that Mix 2 is better in oxide reduction for both temperatures of 900 and 1100°C.
More rounded and bigger pores at 1300°C also shows higher level of sintering for the masteralloy-containing mix which is in a good agreement with the data in table 3.
This affects the subsequent reduction process by diminishing formation of more stable complex oxides with resulting better carbon diffusion and oxide reduction at the temperature range of 800°C to 1000°C.
It can be concluded that reduction of the stable oxides started earlier in the specimen containing masteralloy.
Online since: July 2007
Authors: Leo A.I. Kestens, Yvan Houbaert, Roumen H. Petrov, Pablo Rodriguez-Calvillo
In order to avoid the orientation noise, misorientations below 2° were not considered in the data post processing procedure.
Three different stages of the recrystallisation are clearly distinguishable after examination of the hardness tests results shown in Fig. 1b, together with the evolution of the microstructure and microtexture during annealing represented by the OIM data, (cf.
Fig. 4: φ2=45° section of the ODF for the following samples: (a) hot band material, after (b) 10%, (c) 35% and (d) 70% reduction, after annealing at 800°C for 4 hours following (e) 10 %, (f) 35%, (g) 70% of reduction and after annealing at 900°C for 4 hours following (h) 10 %, (i) 35%, (j) 70% of reduction.
After a reduction of 10%, the samples annealed at 800°C for 4 hours displayed an average grain size of ~130 µm, ~50 µm for 35% of reduction and ~30 µm after a reduction of 70%, (see also Fig. 2g and 2j).
Shear bands with 20 to 35° of inclination with respect to the rolling direction are formed at reductions of 35%.
Online since: July 2011
Authors: Yong Qi Chen
Although traditional SVM has many advantages, it is only fit to estimate crisp data.
Given training data, wheredenotes the space of the input patterns.
The training data points are.
Fuzzy data analysis by possibilistic linear models[J].
Support vector interval regression machine for crisp input and output data.
Online since: October 2011
Authors: Jian Sun, Bo Wu, Wei Hua Zeng
From the data, the CO2 emissions of China’s steel industry stand at more than fifty percent.
This technology has be applied at No.2 blast furnace for a long time in Russia RPA Toulachermet; Production data show that the coke ratio of blast furnace can reduce by 28.5%, and increase 27.3%.
This direct reduction technology use the matural gas as heat source and reducing agent, and it is one of two main types of direct reduction technology.
FINEX technology can overcome some shortcomings of the blast furnace, the furnace of COREX, direct reduction shaft furnace process.
HIsarna This technology is a new type of melting reduction technique.
Online since: August 2012
Authors: Chun Ling Xin, Ya Dong He, Bao Rui Yan, Fen Dong
A slit die connected with gear pump and data Acquisition system designed by ourselves[8] were used to in-line measure the viscosity of polymer/CO2 solutions. 2.3 PPO/POE-g-MAH Blending assisting with SCCO2 PPO resins were premixed with 5,10,15wt% POE-g-MAH and a little amount of antioxidant.
A reduction of shear viscosity was observed by dissolving CO2 into the polymers.
So the reduction of viscosity by SCCO2 is not more obvious than that of PPO.
(a) PPO (b) POE-g-MAH Figure 1 Shear viscosity data of polymer/CO2 solutions at 275℃ 3.2 Morphology of PPO/POE-g-MAH blends Figure 2 showed the SEM photographs of PPO/POE-g-MAH (90/10) blends at various contents of CO2..
The coarsing of disperse phase sizes are responsible for the reduction of impact strength.
Online since: May 2012
Authors: Hong Zhou He, Huang Huang Zhuang, Zhi Wei Li, Zheng Zou
In order to improve the overall efficiency of energy utilization in silicon smelting furnace, a technology solution to recover the furnace radiant heat and exhaust energy was described in this paper; and based on the operation data of a 3200 KV·A industrial silicon smelting furnace, a 400 kW steam turbine generator unit was designed, and the economic benefit from the technology solution was also analyzed.
The results show that this technology solution brings a remarkable performances of energy saving and emission reduction: about 14% of the supplying energy could be recovered; the investment payback period is between two and three years, the economic benefit from the technology solution would reach 4.72 million yuan in ten years.
Industrial statistic data show that in most Chinese silicon manufacture companies, the average power consumption of silicon production per ton is over 13000 KWh, much higher than 11000 KWh in the advanced foreign companies.
During smelting process, it would generate high-power electric arc which cause the reduction reaction between the carbon and silicon dioxide, and the flue gas produced from the reduction reaction should be emitted freely so as to release the furnace’s pressure and decrease the electrode’s temperature.
With the application of waste energy recovery system, energy saving and emission reduction would be achieved greatly: about 14% of the supplying energy would be recovered; the investment payback period is between two and three years, the economic benefit from the technology solution would reach 4.72 million yuan in ten years.
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