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Online since: November 2014
Authors: Shuhaimi Mansor, Afiq Witri Muhammad Yazid, Nor Azwadi Che Sidik, Salim Mohamed Salim
A series of model sensitivity test can be performed to ensure that the final data obtained does not affected by numerical or discretization errors.
The aim of this study was to check model sensitivity and in particular, the mesh sensitivity, statistically steady state and sampling data of turbulent flow in a full scale street canyon.
The tests were analyzed based on the data of wind flow field and pollutant dispersion obtained.
For mesh independent study, the data of streamwise velocity at 4 locations were taken along the vertical middle of the street which are 4 m (1), 8 m (2), 12 m (3) and 16 m (4) from the ground.
Sampling period was also taken into consideration to ensure that the time of data sampling is long enough to yield an appropriate average value of velocity.
Online since: February 2013
Authors: Fa Yun Li, Zhi Ping Fan, Qun Gao, Guo Qiang Wu, Guo Chen Li, Ye Bing Qu
Data Analysis.
Data analyzed with SPSS version 11.0 for Windows.
Our data in Table 1 suggested that the 24 h LC50, 48 h LC50, 72 h LC50 and 96 h LC50 values of deicing salt concentration to Zebrafish were 14.89 g/L, 14.66 g/L, 14.20 g/L and 13.49 g/L, respectively, which indicating that the LC50 values of deicing salt to Zebrafish was gradually decreased during the experimental time.
It is reported that hydroxyl radical in tissues of fish was induced under the condition of pollutant-induced stress, and CAT is responsible for the reduction of hydrogen peroxide to avoid biology being hurt [16].
Our data suggested that the activities of CAT in muscle of Zebrafish increased significantly (P<0.01, P<0.05) at different concentrations of deicing salt in compared with the control group.
Online since: April 2012
Authors: Wlodzimierz Kaluba, Leo A.I. Kestens, Jurij J. Sidor, Roumen H. Petrov
The high resolution EBSD data, collected with a step size of 40nm and 25nm were used also for local texture measurement of the martensite phase and the surrounding matrix.
The data in Fig. 2 are averaged among 5 measurements per sample for the samples reheated at 3000°C/s and 10 measurements per samples for samples reheated at 10°C/s.
This assumption is directly confirmed by the metallographic observation (cf.Fig.3c, d) and the high resolution EBSD data (cf.
However, all the above reported results are obtained in conditions of ultrafast reheating but without isothermal soaking and there are no experimental data about the grain growth evolution in the isothermal soaking after ultrafast reheating.
All texture data are collected by EBSD except the texture of the cold rolled sample Fig. 8a which is measured by X-ray diffraction.
Online since: July 2015
Authors: Breno Ferreira Lizardo, Luciano Machado Gomes Vieira, Juan Carlos Campos Rubio, Marcelo Araújo Câmara
This minimum distance between holes is because that during the trial or in data collection, a hole does not interfere in the final results of another nearby hole.
A fastening system of the body of proof on the dynamometer for effective data collection was manufactured.
With the end of the drilling step and the machining force data, the samples were for the coordinate measuring machine (MMC) for the measurement of roundness deviations.
The manner in which each material relates to generated heat is clear in the data variation of the finished diameter.
E.; Polymer Data Handbook.
Online since: December 2011
Authors: Xin Wang, Shun De Gao, Qi Lu Huang, Rui Jie Li
Data characters of qualitative indices can not be analyzed as the ones of quantitative indices.
Entropy reduction.
Entropy is a term of the thermodynamics and is known as entropy in information theory, which is a measure of information.is the measured data of the j-th index in the i-th system.
Data variance is used to represent the index information content in some analysis methods.
To make all indices are of a unified measurement standards, the raw data of samples are standardized.
Online since: May 2011
Authors: Yong Qing Li, Wen Chen Song, Jia Feng, Mei Liang, Da Xi Dong, Gong Liang Wang, Hong Wei Zhang, Sheng Li Li, Tong Fa Zhang, Hong Li, Luo Fang Guo
According to the investigation of data sheet [6], the data related to decomposition of CaCO3 above 1200K are actually nonexistent, and the result of Differential Thermal Analysis (DTA) experiment indicates that the decomposition reaction of CaCO3 also can occur below a temperature of about 700℃, so it is only required to calculate the Gibbs Free Energy () of CaCO3 decomposition reaction between 900K and 1200K, the reaction equation is shown as equation (1)
Table 3 The experimental data of Xinshan Steel No Hot metal Amounts (tons) Blowing time Final steel Compositions (%) Tempe- rature () Amo- unts (tons) Scrap Lime stone Compositions (%) Tempe- rature () C Si Mn S C Si Mn P S 1 4.33 0.5 0.49 0.018 1318 38.5 --- 2.5 12’30” 0.23 0.14 0.36 0.015 0.021 1674 2 4.2 0.42 0.48 0.020 1324 40 --- 3.0 12’57” 0.10 0.17 0.39 0.009 0.026 1654 3 4.2 0.42 0.48 0.020 1320 38 2 2.4 13’24” 0.13 0.17 0.41 0.012 0.026 1640 Table 4 The compositions of final slag in Xinshan Steel industrial experiments No Compositions Alkalinity TFe CaO SiO2 MgO R 1 16.09 50.44 15.24 7.91 3.31 2 16.69 50.17 14.91 6.47 3.36 3 17.09 49.64 15.89 6.04 3.12 From the results of these industrial experiments respectively inducted in two steel companies, it can be considered that the new steelmaking process with limestone substituting lime is feasible, and there is no splash, which is possibly caused by large amount of CO2 generated from decomposition of limestone
According to the data from Table1 to Table 4, it also can be concluded that the oxygen blowing time remains unchanged, and the compositions and temperature of final steel reach to the required standard.
Qu, “Discussion on Limestone Addition Instead of Lime for Energy-Saving and Emission reduction in BOF Steelmaking”, China Metallurgy (2010), P. 59-62 (In Chinese) [4] H.
Barin, “Thermochemical Data of Pure Substances”, Sci.
Online since: June 2016
Authors: Ignatius Pulung Nurprasetio, Zainal Abidin, Budi Heryadi
Since industrial data acquisition equipment works with discrete-time signals, it is very important to enhance the research by focusing on the discrete-time case.
In addition, as the number of data is increased, which means that data record becomes longer, the number of ripples in the spectral peak will be increasing.
Meanwhile, the peak error reduction performance of another window functions are in between.
Since industrial data acquisition works using DFT, this movements can be used to explain that the frequency error happening in data acquisition is varied Fig. 3 The experiment apparatus from minus a half of frequency resolution to plus a half of frequency resolution.
Online since: January 2022
Authors: Andrea Bocco, Martina Bocci
Ökobaudat (ÖBD) is managed by the German Federal Ministry of the Interior, Building and Community; its data sets must comply with EN 15804.
Data are constantly entered, and the entire database is updated once a year.
The data in this article have been updated to January 2021.
Ökobau data 2021.
A comparative review of existing data and methodologies for calculating embodied energy and carbon of buildings.
Online since: October 2013
Authors: Dalton Cézane Gomes Valadares, Rute Cardoso Drebes, Elmar Uwe Kurt Melcher, Sérgio de Brito Espínola, Joseana Macêdo Fechine Régis de Araújo
Moreover, it is now easier to acquire data quickly in digital format, making use of low cost microcomputers and widely available.
File storage and retrieval/exhibition of information are just some of the advantages of digital data acquisition.
These techniques can often make it easier some measurements difficult, through of extraction of more information from the available data.
The Savitsky-Golay smoothing technique is based on the least-squares fitting of polynomials to segments of the data.
· Which technique requires less capacity of data storage?
Online since: November 2012
Authors: Jian Jun Zhou, Hua Deng, Hao Peng
According the monitoring datas, the stability of the landslide before and after the construction was discussed and analyzed.
At this point, Dayantang landslide is in critical stable state, which is in good agreement with the results of y monitoring data.
The safety factor is about 1.101,this is lower than 1.15 before the construction of the Shuibuya Hydropower Station mainly due to the destruction of engineering geology and topgraphy conditions during the engineering activities. (2) after the rainfall last 1h, because of the sudden rise of groundwater cause the shear strength reduction, slope safety factor reduced to 1.03, the landslide is in the critical stable state.
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