Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: December 2011
Authors: Hu Cai, Peng Zhang, Yuan Xun Wang
Introduction With the growing global environmental and energy crisis, energy conservation emission reduction has become an important issue facing in a new generation of automotive design and manufacturing.
The tensile test and analysis of experimental data suggested that: the Young's modulus of material is very sensitive to welding parameters, especially the actual load; other physical characteristics’ sensitivity to the arc intensity parameters is weak; interaction between welding current intensity and duration of welding is small, the controlling factor is actual load.
Although Sun et al made a relatively detailed study on metallographic structure and mechanical properties of magnesium alloy joints, but there are limitedness and one-sidedness in test methods and data processing.
Under proper current circumstances, the simulation nugget size can fit the experimental data well, but in case the current is much too higher, the error would be obvious.
Online since: May 2024
Authors: Ruben Cuamatzi-Melendez, Fernando Juárez-López, Melchor Salazar-Martínez
A high frequency digital oscilloscope (TDS 210 Tektronix oscilloscope, 1 GHz) was used for data acquisition.
While the dislocations in the boundary remain isolated and distinct, the boundary can be considered to be low-angle, if deformation continues the density of dislocations will increase and a reduction of spacing between neighbouring dislocations occurs.
The distribution of misorientation angle of all facets was analysed with Weibull distribution analysis, Fig. 19 shows the fitted line on experimental data used to compute the Weibull analysis and consequently the value of shape and scale Weibull parameters.
Kestensa, A multivariate grain size and orientation distribution function: Derivation from electron backscatter diffraction data and applications, J.
Online since: October 2010
Authors: Sergey V. Stefanovsky, Sergey A. Dmitriev, Vladimir V. Lebedev, Alexander G. Ptashkin, James C. Marra
The Radon full-scale LILW vitrification plant. 1 – LILW interim storage tank; 2 – LILW transportation vehicle; 3 – pump; 4 – concentrate collector; 5 – rotary film evaporator; 6, 13, 26 – pumps; 7 – condenser; 8 – condensate collector; 9 – batch (feed) mixer; 10 – glass formers bins; 11 – glass formers mixture bin; 12 – screw feeder; 14 – cold crucible; 15 – bag filter; 16 – HEPA filter; 17, 19, 23, 27 – heat exchangers; 18 – scrubber; 20 – heater; 21 – catalytic reactor for reduction of nitrogen oxides; 22 – catalytic reactor for oxidation of ammonia; 24 – fan; 25– sorbent bin; 26. - Pump; 28 – ammonia balloon; 29 – glass canister; 30 – annealing furnace.
The equipment for automated melter cooling control was selected and the contours of automated control for the cooling system were designed thus providing for possibility of automatic data acquisition and calculation of the heat balance of the melter.
Overall, the direction of the work at SIA Radon is to achieve the following: · to maximize melter’s lifetime to 5000 hours by means of the optimization of the design, control the optimal cooling regime for each element of the melter, to minimization of the amount of moving parts and impacted connections; · to simplify the melter design to the utmost under conditions of HLW treatment and to facilitate dismantling and disposal of the melter in the case of failure; · to search for the most heat and corrosion resistant construction materials; · to ensure remote (ideally fully automatic too) control of melter start-up, slurry (paste) feeding, and melt pouring; · to adjust the algorithms of the process control to provide for their adequacy to real characteristics of the process, applying the data gained during the work on the bench-scale facility.
Nevertheless, as follows from reference data, these crucibles don’t have appreciable advantages on specific productivity and melting ratio (heat expenses) over crucibles operated at lower frequencies.
Online since: April 2014
Authors: Konja Knüppel, Peter Nyhuis
Due to the reduction of throughput times and stock levels, the workpieces have to be provided to the assembly systems increasingly just-in-sequence and in a large number of variants.
Figure 10: Measurement of the vertical flow speed in the cylinder [33] In order to be able to derive measures for the improvement of the flow conditions in the cylinder, the data obtained from the measurement were transferred to a simulation.
This was validated on the basis of the data of the PIV measurement (see Figure 11).
Figure 11: Validation of the simulation (left) with the data of the PIV measurement (right) Even if aerodynamic separation has still not been fully researched, important advantages can already be identified over conventional separation and feeding systems.
Online since: January 2024
Authors: Tushar D. Deshpande, Mahendra L. Bari, Jitendra S. Narkhede, Ujwal D. Patil, Ketankumar G. Chitte, Ravindra G. Puri
Zhu et al explained the reduction of efflorescence by use of VAE copolymer dispersible powder in Portland cement-based decorative mortar[19].
Still there is limited data available on the performance of redispersible polymers compositional analysis and its effect on adhesive properties of cementitious material.
The outcomes were based on data gathered over a 28-day period, RDP-C and RDP-D have the greatest performance of all polymers because of their chemical structure, which is essential for boosting adhesion strength.
Both data indicate an exothermic peak around 400 °C, which denotes RDP oxidation[49].
Online since: September 2023
Authors: Amira Aguenarous, Nassima Moussaoui-Khedam, Hammadi Larbi
Creep and recovery tests were carried out as follows: After a rest time of 600 s prior to the measurements, a constant shear stress = 0.5 Pa was applied to the samples and the compliance (J) was recorded as a function of creep time; at t = 180 s the stress was set to zero and the recoverable part of compliance was measured as a function of the recovery time equal to 180 s. 2.3.6 Statistical analysis Statistical data entry and analysis were performed using IBM SPSS Statistics version 25.0 software.
This test was applied for statistical comparison of the measured data; to estimate the differences in the size of the oil globules between the different multiple emulsions at D0 and for the variation in globule size and conductivity between D0 and D28.
In this study, when the concentration of xanthan gum was increased from 0.05 wt% to 0.175 wt% (ME1 and ME5), an outstanding reduction of the average diameters respectively from 68 µm to 18.21µm (p-value =0.011) was observed.
Experimental data were fitted to a modified cross model (Eq.2) developed by Grassi et al [25] which has been successfully employed in weak get systems.
Online since: June 2013
Authors: Badis Haddag, Mohammed Nouari, Claude Barlier, Julien Thil
Recently, Atlati et al. [32] have introduced a new parameter, called segmentation intensity ratio based on the evolution of the plastic strain along the chip length, and Kouadri et al. [33] other parameters based on dimension characteristics of the chip to quantify the chip segmentation phenomenon, and explain ([32], [33]) with these parameters the cutting force reduction with cutting speed increase.
Hering, Detection of chatter vibration in a drilling process using multivariate control charts, Computational Statistics and Data Analysis 52 (2008) 3208-3219
Theis, Spiralling in BTA deep-hole drilling: models of varying frequencies, From Data and Information Analysis to Knowledge Engineering, Studies in Classification, Data Analysis, and Knowledge Organization (2006) 510-517
Online since: June 2020
Authors: Chang Sheng Yue, Chang Bo Liu
All experimental data were measured three times, and the average value of three times was used to calculated basis in Eq. 1-Eq. 3.
The carbon contents in gaseous products with catalysts both decreased with a small reduction.
Fig.5 Carbon distribution of pyrolysis products with or without catalysts 2.3 The characteristics of pyrolysis products 2.3.1 Solid product Compared with the proximate and ultimate analysis of coal in Table 1, the data of solid products in Table 2 shown that the moisture and volatiles decreased, and the ash and fixed carbon increased after microwave hydrogenated pyrolysis.
The numbers “1-3” in Fig.7 denote different surface regions of solid products, and the data in Table 3 were element content of region 1.
Online since: June 2014
Authors: Bruno Monardo, Anna Laura Palazzo
Still, such a ‘view from above’, while providing quantitative data related to food access, neglects several qualitative features that could prove assets in a place-based approach.
Beyond the paradoxical defiance in such a ‘global economy’, it should be noted the role that UA plays against the reduction of the ecological footprint and/or the raising of market price of fruits, vegetables and dairy products.
Information on http://www.ers.usda.gov/data-products/food-access-research-atlas.aspx./ [5] USDA, Office of Communication, Release 0191.11 (2011).
Online since: June 2020
Authors: Terence G. Langdon
Plotting the results as flow stress versus strain rate, it was shown that the data delineated three separate regions of flow with a high strain rate sensitivity and large tensile elongations at intermediate strain rates in region II and significant decreases in the elongations and lower values of the strain rate sensitivity at low strain rates in region I and at high strain rates in region III.
Fig. 2 Schematic illustration of the variation of elongation to failure with strain rate showing the effect of a reduction in grain size [14].
Each datum point in Fig. 5 represents a different sample that was held at the annealing temperature for one hour and then measurements were taken to determine the grain size.
Showing 39941 to 39950 of 40694 items