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Online since: October 2011
Authors: Wen Yong Liu, Xiao Liang Xu, Yong Ye An
This essay is the subject of national eleventh five support schemes: The analysis of key technology on emission reduction and comprehension utilization of solid waste from large iron ore mine (Number:2008BAB32B14).
Introduction This essay is the subject of national eleventh five support schemes: The analysis of key technology on emission reduction and comprehension utilization of solid waste from large iron ore mine (Number:2008BAB32B14).
The size distribution data of iron tailings refer to Table 2 .
Table 6 The working performance of sprayed concrete with iron tailings Sample number Sprayed concrete slump (mm) Initial setting time (min) Rate of resilience (%) 1 70 26 <35 2 130 45 <10 3 115 44 <5 4 70 40 <5 5 95 20 <5 6 70 42 <10 The data in Table 6 indicates that value of sprayed concrete sample slump is less than 130mm and below standard 160 mm, the initial setting time range is in 20 to 45 minutes,the rate of resilience less than 40%.
Test data in Table 5 showed that the the performance of sprayed concrete with iron tailings was better than that of sprayed concrete with natural sand.
Online since: February 2011
Authors: Bo Zhou, Nai Rui Liu, Lei Lei Mi
During the recycle process of malysite in sludge under the synergistic effect of acidification and ultrasonic, the features of malysite, the principles and steps of design calculations for sludge malysite are introduced on the basis of the previous experimental data.
Design calculations are conducted in the light of the requirements on design flow, cycle time, influent water quality, material and experimental data.
In combination with the data of earlier experiments, and for the convenience of skid-mounted connection, the designed process flow is divided into four functional units, including the pretreatment unit, the coagulation treatment unit, the malysite recovery unit and the sedimentation filtration unit.
The filtering material layer that consist of the materials in the pollutant-holding layer and in the protective layer should be designed based on the type, grain size and thickness (all could be found in data sheet) of filtering materials.
The process feasibility is verified by a self-made packaged plant to realize reutilization and reduction of sludge.
Online since: March 2020
Authors: Duo Qiang Liang, Yong Deng, Ya Qin Guo
In order to verify the data calculated, the following experiments are conducted to characterize it.
Preparation of titanium by electrochemical reduction of titanium dioxide powder in molten SrCl2–KCl [J].
A study of preparation of titanium metal by the electrochemical reduction of titanium dioxide in molten salt [J].
Behavior of calcium chloride in reduction process of titanium dioxide by calcium vapor [J].
Direct electrochemical reduction of titanium dioxide in molten lithium chloride [J].
Online since: August 2004
Authors: M.L.Q. Andrade, S. Manrich, L.A. Pessan
Although the sorption behavior of polymer-clay nanocomposites has been investigated by Gorrasi et al [7,8], the literature still contains little data on the subject.
Therefore, the goal of this study is to contribute pertinent data on the sorption of organic liquids in PET and PET-clay nanocomposite films prepared by melt intercalation and hot pressing, as well as to discuss an investigation into the related solvent-induced crystallization phenomenon (SINC).
So, from the intrinsic viscosity values, in Table 1, is seen that the PET and nano-PET samples underwent a reduction in their average molecular weight after processing.
The reduction in average molecular weight of the nano-PET samples after processing may also have contributed to this effect.
This statement is corroborated by the data on our PET and nano-PET samples given in Table 2, which compares the values of xc1 (degree of crystallinity in the first heating cycle, after quenching at 0 oC) and xc2 (degree of crystallinity in the second heating cycle, after slow controlled cooling at a rate of 10oC/min).
Online since: July 2015
Authors: Henrique Butzlaff Hübner, André João de Souza
Introduction Milling process is constantly evolving due to a large demand on precision manufacturing, as well as efficiency and cost reduction.
Here, the static force magnitude is interpreted as an average value within a specified time domain of the sampled data to establish cutting force magnitude.
The data acquisition board used was a Measurement Computing model PCIM-DAS 1602/16 with 16-bit resolution.
A specific VI (Virtual Instrument) was used to data processing of milling.
This fact is probably due to the reduction of the specific cutting forces (Ks) with increase ap and f [8, 9].
Online since: April 2016
Authors: Janusz T. Cieśliński, Bartosz Dawidowicz, Aleksandra Popakul
Data reduction The actual useful power extracted from the solar collector is calculated as (1) where specific heat of the nanofluids - corresponding to the mean fluid temperature is calculated as [13] (2) The instantaneous efficiency of a solar collector, operating under steady-state conditions, is defined as the ratio of the actual useful power extracted to the solar energy absorbed by the collector (3) The instantaneous efficiency is generally presented as a function of the reduced temperature (4) where the mean temperature of the fluid reads (5) The uncertainties of the measured and calculated parameters are estimated by mean-square method.
Results Figure 2 shows the comparison of present experimental results with data obtained by Yousefi et al. [5] for water-Al2O3 nanofluids with the same nanoparticle concentrations, i.e. 0.2% and 0.4% by weight.
Figure 2: Comparison of present results with data published in [5] Figure 3 shows the effect of nanoparticle concentration on the efficiency of solar collector versus reduced temperature.
The reduction as well as increase of nanoparticle loading resulted in deterioration of the solar collector efficiency of about 17-20%.
· Radiation reduction results in decrease of the solar collector efficiency.
Online since: April 2018
Authors: Alexander Thoemmes, Ivan V. Ivanov, Adelya A. Kashimbetova
All corrosion resistance data in work are presented relative to the used silver chloride reference electrode.
The numeric data of these experiments are presented in Table 3.
In addition, corrosion happens due to the reduction of oxygen molecules, adsorbed to the metal surface, as shown by the Eq. 2.
The curves of the open-circuit potential as a function of time in HBSS (a) and saline solution (b) at 37 °C for CR α-titanium (ε ~ 60% and ε ~ 30%), and EBC Anode dissolution: Ti0 → Ti4++ 4e Cathode reduction: 2H+ + 2e → H2 (1) Corrosion mechanism: Ti0 + 2H+ → Ti4++ H2 Anode dissolution: Ti0→ Ti4++ 4e Cathode reduction: O2 + 2H2O + 4e → 4OH- (2) Corrosion mechanism: Ti0 + O2 + 2H2O → TiO2∙2H2O Fig. 3 shows potentio-dynamic polarization plots of titanium in saline solution.
Calculated corrosion data of titanium in saline solution at 37 °C CR60 CR30 EBC Ecorr [mV] -147.81 -133.58 -168.42 Rp·10-4 [mOhm·sm2] 80.27 78.50 30.73 ba [mV] 106.36 108.65 126.08 bc [mV] 133.92 85.57 123.69 Bact [mV] 25.74 20.79 27.11 Bdiff [mV] 46.18 47.18 54.75 jcorract [nA·sm-2] 32.07 26.48 88.22 jcorrdiff [nA·sm-2] 57.53 60.10 178.15 CRactiv [µm·year-1] 0.28 0.23 0.77 CRdiff [µm·year-1] 0.50 0.52 1.55 According to Lee et al, the density of basal planes (0001) <1010> and (0001) <1120> is 20-25% after cold rolling of α-titanium with a deformation ratio of 60% [10].
Online since: August 2014
Authors: Xiao Bin Shen, Zuo Dong Mu, Yue Zhou, Gui Ping Lin
POD is an effective method for dimensionality reduction and data decomposition, which could validly reduce the degree of freedom of the physical model with a close approximation.
Due to the effectiveness on reduction of computation time and data store, POD method is applied to fast prediction of ice shape.
The ratio of the energy contained in a certain mode can be measured by (6) The modes containing less energy can be negligible; leading to a reduction of basis, therefore the sample vector is represented as (7) The sample vector is of L basis, where L<=M.
While the 1st eigenvalue of height matrix is about one order of magnitude of the others, and it represent ice height characteristics therefore energy analysis and degree reduction can be applied.
Predictions of a temperature at 257K and 262K are calculated and compared with CFD data.
Online since: September 2016
Authors: Yuriy Yu. Drozdov, Aleksandr Karakulov, N.V. Gusev, N.Y. Nikonova
Electrophysical characteristics of ceramic materials made of aluminium oxide (Al2O3), silicon carbide (SiC), aluminium nitride (AlN) and beryllium oxide (BeO) according to the data of the Russian and foreign literature [1].
After holding, the electric power supply of the press was switched off; lowering of the temperature with a subsequent reduction of the pressing pressure up to the level of 5 MPa took place.
Owing to a considerable reduction in porosity, there is an increase in heat conductivity of samples.
In this connection from the obtained experimental data, it is visible that the amount of the modifying additive does not always lead to a significant reduction of porosity.
Micrographs of the structure of AlN ceramics Conclusions On the basis of the presented data it is possible to make several conclusions: - First, there is an explicit positive effect of introduction of the modifying additive into the composition on heat-conductive properties of aluminium-nitride ceramics, which consists in creation of dense indissoluble intergranular boundaries (Fig. 5, AlN–90%+Li2O3–7%+Y2O3–3%).
Online since: March 2014
Authors: Ribelito F. Torregosa, Wei Ping Hu
The standard also requires that the risk assessment be updated when new data are obtained for the EIFS.
To conduct a PRA, typically four sets of input data are needed.
The other two sets of input data (i.e., stress exceedance and fracture toughness distribution) are of lesser concern for some types of aircraft due to the abundance of data and their relatively lower influence on analysis results.
At the start of a PRA of fracture, an estimated EIFS distribution is derived using the available teardown crack data which could be historical data or data from another source.
Many aircraft types will not have teardown data, which makes the updating more valuable.
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