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Online since: June 2014
Authors: Valeria Corinaldesi, Alessandro Nardinocchi
The experimental results obtained by using expansive and shrinkage reducing agents were extremely encouraging in termsof free dryingshrinkage reduction, and even surprising in terms of flexural behaviour.
The slightly negative effect of SRA on mechanical performance is well-known on the basis of data reported in the literature [8, 9], indeed.
On the other hand, the addiction of SRA slightly penalized the flexural strength, as expected also on the basis of the compression stress,as well as on the basis of data reported in the literature [8, 9].
As you can see in Figure 3, the presence of expansive agent, with or without SRA, allows a reduction of 56-day drying shrinkage strains equal to about 30%.
The same positive effect was detected also by [10], which found an even higher reduction of roughly 80%.
Online since: November 2011
Authors: Cheng Sun, Yuan Yuan Wang, Qian Huang, Qi Ming Xian
Nanoscale zero-valent iron (NZVI) particles were supported onto activated carbon fiber (ACF) by impregnating ACF with ferrous sulfate followed by chemical reduction with NaBH4.
Fig.1b showed the SEM image of the NZVI particle made by liquid-phase reduction method.
The size of Fe immobilized in the ACF pores was smaller than a typical size NZVI made by liquid-phase reduction method.
Fig. 4d showed the result of application of equation (7) to the chloroform dechlorination data for ACF/NZVI.
The model provided an adequate fit of the experimental data.
Online since: April 2014
Authors: Jun Wei Bi, Fang Ouyang, Jian Wei Han, Wei Ming Liao
To analysis observed data of the long-term settlements in the dyke, three stages can be gotten i.e.
This paper based on observed data of a long-term settlements, making an analysis into the effect and the settlements developed characteristics of foundation reinforced by geotextile-encased sand columns.
The data are from a land reclamation project for the airplane dockyard (EADS) at the Elbe River in Hamburg, Germany.
And in this practical engineering, geotextile encased sand column has good effect. 1 Compared with the rear-anchored raking pile method previously,The solution saves a lot of money. 1) eliminated 35000 tons of steel, since a sheet wall was not necessary ; 2) saved 150000 m² of tidal mud flat reclamation; 3) used 1100000 m³ less sand to fill up the dike , for steeper slope(1:6 against 1:20), and large settlement reductions. 2 Cut down the time.
3 The elimination of bulging of the rock column controls the rock quantity, reducing the amount of sand,and making construction costs more predictable. 4 Produced very little noise pollution (12 vibro displacement machines reached a noise level of 50 dba at a distance of 1000 m). 5 Effected a dramatic settlement reduction and a high settlement acceleration similiar to that of vertical drains.
Online since: October 2015
Authors: Robert Falster, Vladimir V. Voronkov
(3) The value of DI CIe in a wide range of T has been independently deduced from the data on in-diffusion of Au and Zn [11, 12], and the result is consistent with the Eq. (3).
An existence of slow-diffusing Figure 1 Vacancy diffusivity data.
vacancy species is supported by the data on the enhanced self-diffusivity under hot proton irradiation [16].
Interpretation of the RTA data on vacancy (or precipitate) depth profiles depends on the assumed mechanism of Vs loss during the cooling stage of RTA and the post-RTA annealing.
A fast reduction in τ*(T) upon raising T is compensated for by a fast increase in the Cse/Cse* ratio.
Online since: July 2003
Authors: J.S. Owen, N. Haritos
In these methods, the vibration data are first pre-processed to obtain a reduced feature vector that contains the key characteristics of the original data.
Both techniques show that the spectral data for the repaired bridges are significantly different from the data for the undamaged structures, which is expected given the nature of the repair.
incoherent frequency shift The same ANN as used on the experimental data was also used to classify the simulated data, although it was retrained using a subset of the simulated data for the undamaged and fully damaged cases.
As in the experimental data there was no confusion when the ANN was used to classify test data from these two extremes.
The problem of identifying data sets that differ significantly from an original undamaged data set, the novelty detection problem, requires a different approach to training the ANN (unsupervised learning) and these methods are currently being applied to the data sets to achieve this.
Online since: May 2011
Authors: Liang Li, Si Li, Ni Li, Jing Xiao
(4)Scientific and simplicity principle of unity Evaluation index system of energy-saving buildings must be built on a scientific basis, using as much data can be objectively quantified; in the same time, the evaluation index system must also be concise.
(1)Assignment of quantitative indicators Progress of the project, the payback period, energy savings, emission reductions and other indicators can be quantitatively described.
Pollutant emissions includingCO2,SO2,soot and other pollutant emissions, formula for calculating emission reductions: is reductions,is pollutant emissions before modification,is pollutant emissions after transformation
In order to evaluate the effect of energy-saving success of this paper evaluation method [7], the success of the project to make qualitative assessment of the degree is divided into a very successful (AA), success (A), essential for the success (B), unsuccessful (C ), failure (D) five levels, the progress , construction disturbance, the payback period, environmental impact, user evaluation, sections of heat, saving electricity, water saving, CO2 emission reduction, SO2 emission reductions, emission reductions and other dust 11 indicators are labeled C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11.
(3)Determine matter-element to be evaluated Where: indicates things to be evaluated, is the value ofabout index , Specific data of objects to be evaluated.
Online since: February 2012
Authors: Gui Mei Shi, Yan Ming Chen, Da Wei Yu
Synthesis of silver nanoparticles through two-phase reaction by the reduction of N, N-dimethylformamide Dawei Yua, Yanming Chenb, Guimei Shic School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003, P.
Introduction Research on synthesis and properties of metal nanoparticles has attracted much attention in recent years due to their potential applications on catalysis, optics, data storage and biological labeling1-2.
However, DMF exhibits good stability and mild reduction behavior compared to NaBH4.
Online since: August 2011
Authors: Thorsten Siebert, George Lampeas, Vasilis Pasialis, Mara Feligiotti, Andrea Pipino
It is normal practice to assess the accuracy of numerical results by comparing the predicted values to corresponding experimental data.
Progress has been made in the frame of project ADVISE [4] in developing an integrated methodology for comparing FE simulations to experimental data, including the use of reduced or decomposed data.
Different shape descriptors (Zernike moment, Discrete Fourier transform (DFT), Tchebichef features, etc.) can be used to reduce the amount of the data in order to simplify the data comparison.
The successful comparison of data is based on both conventional point-to-point techniques and the more advanced image decomposition approaches.
Nevertheless, the ‘shape descriptor’ comparison approach seems to be a powerful tool with the main advantage of a radical data reduction, therefore by its further development it is expected to become a reliable tool for integrated comparisons between experimental and simulation results of large scale complex structures, subjected to highly non-linear dynamic events.
Online since: May 2012
Authors: Tao Deng, Jun Yao Yao, Jian Xian Tang
In the process of unloading, rate of permeability increase slowly with the reduction of effective stress.
Test data analysis.
The experimental results are shown in Table1: according to analysis of data in Table 1, obtain the relationship between permeability of coal sample and effective stress.
Use the test data of Table 1 for further processing to get the fitting relationship between permeability of coal sample and effective stress.
Although the test stress level is low, from the data in table 1 and the development trend of the curve in Fig.3 can be seen, the raw coal sample has the same variation.
Online since: November 2010
Authors: Hong Xiang, Wen Ming Wang
Therefore, replacement of plastic-based cushion packaging with honeycomb paperboard material is a green and low carbon development road with which it can provide a feasible and technical solution with environment protection, material saving and GHG emission reduction for packaging industry.
It can be easily obtained that 7.83(7.36+0.47) tons of CO2 emissions will be reduced if one tons EPS packaging material can be replaced by honeycomb paperboard, and it will be more if we consider the emission reduction caused by using recycled paper to produce honeycomb paperboard.
Based on the statistics data of packaging industry in 2008, the annual waste of EPS packaging material was more than 1.5 million tons in China.
If there is 30 percent of EPS packaging material can be replaced by honeycomb paperboard, the CO2 emission reduction will be more than 3.5 million tons in one year in packaging industry in China.
More and more people have come to realize the importance of CO2 emission reduction, and look for the green and low carbon packaging solution for their products in China.
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