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Online since: May 2011
Authors: Yu Bin Liu, Lei Xu
The effect of section dimensions on temperature reduction is significcant both for the section center and for the steel out surface.
The reduction in temperature due to the increase of dimensions becomes less significant when C exceeds a certain range (about C=2000mm).
It can be found that the influence of steel ratico on steel tube and section core temperature reduction is less.
The theoretical predictions in this paper are in good agreement with the experimental data
The increase in section dimension results in a temperature reduction within the section, whereas the reduction in temperature becomes less significant when C exceeds a certain range.
Online since: December 2013
Authors: Denis V. Kuznetsov, Alexander A. Gusev, Anna Yu. Godymchuk, Elizaveta Karepina
According to s SEM data, the exposed particles retained their spherical shape.
Results and Discussion As per SEM data, the examined powder is presented by spherical particles (average size 90 nm), built up into 4-5 mm aggregates.
As per X-ray phase analysis data, the metallic aluminum content in the dried sample was not more than 6 %wt, the balance was gibbsite Al(OH)3.
Tables 2 and 3 present the data on the composition and dispersion of dried samples after interaction with physiological solutions.
SEM-images and X-ray data were provided by Edgar Dvilis and Artem Kachaev, Nano-Centre of Tomsk Polytechnic University.
Online since: December 2016
Authors: Jian Wei Huang, Jonathan Davis
Literature review showed that the tensile strength reduction of the GFRP bar should be governed by the sustained stress level in the GFRP bar.
Lee [4] reported there is an area of 3.5×108 m2 bridge deck in the US [4], 86% of which are made of cast-in-place concrete deck on the basis of the National Bridge Inventory (NBI) data [4].
In order to account for the potential strength reductions due to material degradation over time in concrete, an environmental reduction factor (ERF) is specified in ACI 440.1R-06 [2].
Recent researches showed that a 20% sustained stress could lead to a significant strength reduction of the GFRP bar in moist concrete under elevated temperatures [10, 11].
Aboutaha, Environmental reduction factors for GFRP bars used as concrete reinforcement: new scientific approach, J.
Online since: May 2011
Authors: Nian Ping Liu, Hong Tu Wang, Zhi Gang Yuan
Rough Set The concept of rough set was originally proposed by Pawlak as a mathematical approach to handle imprecision, vagueness and uncertainty in data analysis[7].
, when output data is continuous data, it must be changed into discrete data.
In this paper, a decision table was formed by discrete data which continuous attributes were changed into discrete data based on information entropy.
Rough set theory process entirely from the actual data, mine knowledge form hidden data, reveal the internal laws of the objective, without any influence of subjective factors, so the conclusion is more substantial and more meaningful. 2.
Rough set needs change continuous data into discrete data, so the discrete way determines the cuts of continuous data, which have an important influence on analysis, but the discrete way is lack of specific standards at present and it needs further research.
Online since: March 2012
Authors: Jian Xiang
It can assist in testing samples and exacting unknown data to obtain favorable classification goal, which is to obtain a good learning ability for generalization.
The third factor is how to find a classification mechanism based on the features of these limited samples, so that it can assist in testing samples and exacting unknown data to obtain favorable classification goal, which is to cultivate a good learning ability for generalization[2].
However, PCA and SVD are only applicable to data analysis when based on the amount of energy to eliminate second-order serial correlation among different data; while ICA is effective in eliminating high-order serial correlation among data[3][4].
Xm stands for the image training sample which has undergone reduction, and every sample image block stands for one row in xm, with xm the matrix m x L.
Conduct pre-processing of the sample data based on specific problems.
Online since: April 2021
Authors: Aleksey N. Shapovalov, Roman R. Dema, Aleksandr A. Kal'chenko
The article presents the results of the analysis of production data on the operation of the blast furnace No. 1 of Ural Steel JSC for the period from 2013 to 2018.
Averaged data on the chemical composition of fluxed and non-fluxed pellets of MGOK (according to technical reports) used in the study period are presented in Table 1.
Marklund, Determination of bulk properties and fracture data for iron ore pellets using instrumented confined compression experiments, Powder Technol. 241 (2013) 19-27
Liu, Low Temperature Reduction Degradation Characteristics of Sinter, Pellet and Lump Ore, J.
Chakraborty, Effect of fluxing agents on reduction degradation behaviour of hematite pellets, Ironmak.
Online since: May 2012
Authors: Xin Hua Wu, Ling Zhi Sun
The study of building industrialization development mode based on carbon emissions Trading Lingzhi Sun1 Xinhua Wu2 (1,2 Shan dong university of science and technology, China) (1sdkdslz@163.com,2 xinhuawu@126.com) Key words: building industrialization, external economy, carbon emission trading, development mode Abstract: Building industrialization has great significance to change the traditional mode of construction production,helps to achieve the goal of energy saving and emissions reduction, and promotes the sustainable development.The paper analyzes the low carbon characteristics of building industrialization products and the market failure caused by external economy, introduces the market mechanism of carbon emissions trading,which makes supply and demand of building industrialization products to approach or achieve the optimal state of Pareto.
But the traditional mode of construction production is hard to achieve the target of carbon reduction, in comparison,the building industrialization production has the effect of significant reduction and it has accounted for a considerable share of the market in developed countries,such as,the United States for the 31%,Northern Europe countries are more than 60% [3].At present,China has the conditions of developing building industrialization,but just be in the ascendant,the main reason is that our country is lack of corresponding policies to promote and guide.
Kyoto Protocol makes the market mechanism as the new path to realize the reduction of the greenhouse gas emissions, carbon emissions trading is essential marketization means to control carbon emissions.China has adopted the “Twelfth Five-Year Plan”scheme of greenhouse gas emission control,and proposes to establish the market of carbon emissions trading [1],and the experts point out that our country would like to realize compulsory carbon emissions trading in future.Therefore,to research the development mode of building industrialization has an important sense for building energy saving and emissions reduction, combined with the characteristics of building industrialization, based on the perspective of carbon emissions trading.
Carbon emissions trading system has been proved to be the most effective emissions reduction system, and be attentioned more and more by international, which has become a worldwide market mechanism of reducing carbon dioxide emissions [4].
Assessment and monitoring institution for the life cycle carbon emissions is an independent third party, which is in charge of carbon emissions assessment during the decision-making period,energy consumption monitoring during the construction and operating process,dynamic monitoring of building energy consumption and carbon emissions, acquisition of monitoring data for carbon emissions.If the actual carbon emissions is less than (greater than ) the initial distribution, we can sell( purchase) it in the market,so we can promote the formation of carbon emissions trading market timely and effectively,the remaining one can obtain corresponding economic benefit compensation.
Online since: March 2011
Authors: Stefania Bruschi, Alberto Molinari, Ivan Lonardelli, Paolo Bosetti
Xray diffraction (XRD) analysis was utilized to determine the fraction of transformed martensite along the wall of formed parts at different levels of thickness reduction.
For each sample, the value of approximate thickness reduction was determined from the measured part thickness profile.
The obtained data are first refined taking into account the instrument parameters and background, then the crystallographic and microstructural parameters and finally all the parameters including the volume fractions of the phases.
Fig. 2b) shows the martensite volume fraction during the SPIF process as a function of the part thickness reduction.
The spectra are obtained from the two sides of the same sample (sample n.4 with thickness reduction of 24%) accounting the “contact tool face” (a) and the “external face” (b).
Online since: August 2014
Authors: Fu Neng Tan, Xue Hui Pang, Yun Bo Zhou
With potassium ferricyanide as the probe, electrochemical properties of this sensor were characterized via electrochemical impedance spectroscopy(EIS) and measured EIS data were fitted with an equivalent circuit to investigate the detailed information about the electrode/solution interface.
Comparing the data obtained, it can be concluded that the L-Ser/CS-GCE presented the lowest Rct in the interface and concomitant higher Cdl, reflecting an improvement of the effective electron transfer rate.
At bare GCE, PA showed a weak oxidation current peak at 0.49V and a reduction peak at 0.01V.
A pair of large oxidation and corresponding reduction peaks are observed at 0.72V and 0V on the L-Ser-GCE.
A oxidation peak at 0.71V and a reduction peak at -0.14V were observed at the CS/GCE.
Online since: March 2009
Authors: Reza Ebrahimi-Kahrizsangi, Ali Shokuhfar, Bahman Nasiri-Tabrizi, Omid Gashti
The obtained data show that the increase in milling time leads the increasing in lattice strain and decreasing in crystallite size.
According to data presented in Tables 1, and Fig.4 with increasing of milling time, the crystallite size decreases and lattice strain increases.
Here, with increasing milling time, the reduction of particle size occurs while the shape of product is flake like.
Here with increasing milling time, the reduction of particle size occurs similar to R1 sample but the shape of the production will be irregular.
According to the TEM micrographs, with increasing milling time to 60hr, the reduction of crystallite size occurs for R1 reaction and the shape of product looks like a rod.
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