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Online since: December 2012
Authors: Abdallah Diha, Zakaria Boumerzoug
This material is submitted to successive reduction by cold wiredrawing process.
The specimen elongation (strain) was measured by an acquisition data computer.
Effect of stress Figure 1 shows a series of creep curves, plotted as creep strain versus time for aluminum drawn wire with a rate of reduction up to 92.45 %.
Creep curves of aluminum wire with rate of reduction up to 92.45% at (σ1 =88, σ2 =106, σ3=123 MPa) and T = 473K.
The test data show a significant dependence of the minimum creep strain rates on the stress value.
Online since: October 2011
Authors: Paramdeep Singh, Harpuneet Singh
Thus the emphasis has shifted to improving gross margins through cost reduction.
It is very important to use actual time measured rather than the average of previous data.
The various gap areas observed from the current state map (Fig. 1) are: 1) Work in process between various operations is considerably high. 2) Station cycle time variation is more, which lead to imbalance in the production. 3) Production lead time is quite high. 4) Production is below the installed capacity as per the data. 5) Improper utilization of the workers.
The results of value stream mapping (Table 1) compares before current state and after future state data for crank case.
The future state value mapping of the crank case shows reduction in total lead time by 50.5 %.
Online since: September 2007
Authors: Dj. Kosanović, Lj. Milovanović, S. Milovanović, A. Šaponjić
The carbothermic reduction reactions proceed in three steps: 4 H3BO3 ⇒ 2 B2O3 + 6 H2O (1) B2O3 + 3 CO ⇒ 2 B + 3 CO2 (2) 4 B + C ⇒ B4C (3) Step 2, reduction of B2O3 with CO becomes thermodynamically feasible above 1400°C [7], however, the reduction temperature needs to be maintained beyond 2000 °C to achieve an enhanced rate of reduction accompanied by the formation of B4C in the third step [8].
The starting structural model for the rhombohedral crystal system was built with crystallographic data with space group: R -3 m, reported by Kwei and Morosin [9].
Fig. 5 Structural refinement patterns of boron carbide using X-ray powder diffraction data based on the rhombohedral phase.
Tick marks above the difference data indicate the reflection position.
Table 2 Structural parameters for boron carbide obtained from structural refinement using X-ray powder diffraction data at room temperature.
Online since: October 2011
Authors: Qing Juan Meng, Jing Sheng Qiao, Wei Hua Ma
In order to reduce the noise affect in the process of the dynamic strain gauge collecting, respectively deal the measurement data with the low-pass filter.
In the paper, the data except in special indicate, all is conversed based on similarity ratio.
隔振沟两侧0.1米处布设加速度传感器 模拟隔振沟宽2.5米,长5米,深度分别为2.5米,3.75米,5米, 距夯击点12.5米,隔振沟两侧2.5米处布设压力传感器和加速度传感器 Vibration isolation ditch 0.1 meters wide, 0.2 meters long, 0.1m deep, filling with the mixture of sand and stone, 0.5 m from tamping point, acceleration sensors placed in isolation ditch of 0.1 meters on both sides. 0.5m米 0.5m米 0.5m米 Tamping point 0.5m米 1004 1006 1005 1007 1008 1009 1010 1011 acceleration sensor Figure 2 Vibration isolation ditch arrangement Test results and analysis The horizontal acceleration transfer law under different ramming energy The acceleration schedule of each point was measured in the test, by means of picking the maximum point of the acceleration schedule, the relevant data was obtained in table 2.
According to the model test data, Considering the level distance for tamping point and ramming energy two factors , the horizontal acceleration attenuation formula was fitted as follow: (1) Where a—the horizontal vibration acceleration, g.
(2) the vibration reduction effect of vibration isolation ditch is obvious, the deeper the vibration isolation ditch vibration reduction effect the more obvious, and in the guarantee vibration isolation ditch don't collapse, the vibration reduction effect of ditch full of sand and stone mixture is less than no filling.
Online since: June 2013
Authors: Jie Huang, Kai Chai, Hao Chen, Mei Jun Zhang
Acquisition bearing 4 typical state of vibration signal of a total of 400 group sample data respectively is normal, ball fault, inner circle fault and outer ring fault.
Random each state of 50 groups sample data is in this study.
Fig.1 Bearing time domain waveform Fig.2 The time domain waveform after noise reduction Improved EEMD threshold noise reduction.In order to improve classification accuracy of combination improve EEMD with SVM,Signal threshold noise reduction by the improved EEMD outstands sample characteristics and eliminate random noise interference, Fig.2 is bearing 4 typical state of time domain waveform after signal noise reduction.
The 20 group sample data from four state in random each sample constitute training set.The 80 group training sample in all and9Dcharacteristic vector show in fig.6.
Advances in Adaptive Data Analysis, Vol.1(2009),p1-41 [4] M.J.
Online since: May 2013
Authors: Feng Lan Han, Qi Xing Yang, Lan Er Wu, Chun Du
Besides acting as a catalyzer for MgO reduction, H3BO3 stabilized also b-Ca2SiO4 in the Mg slag.
Feng Gao et al., using data of fluorite consumption in Pidgeon process and an emission factor, calculated amounts of HF gas emission for different fuel scenarios in China [8, 9].
Section for briquette heating and MgO reduction, b.
The MgO reduction was ended with power-off for the furnace and the vacuum system.
The H3BO3 aided not only the reduction of MgO in briquettes, but stabilized also the β-Ca2SiO4 formed by products of the reduction, CaO and SiO2.
Online since: December 2012
Authors: Marcos Marques da Silva Paula, Geovana Dagostim Savi, Jonathann Corrêa Possato, Tatiana Barichello, Denise Castagnaro, Vildes Maria Scussel
In the storage they are responsible for grains heating which lead to losses of germination, discoloration, reduction of nutritional values and odor changes.
Antifungal activities of GNP against F. verticillioides on PDA at different concentrations (data are shown as average values and standard deviation of diameter fungal colony - each point represents an average of triplicate measurements).
Antifungal activities of GNP against P. citrinum on PDA at different concentrations (data are shown as average values and standard deviation of diameter fungal colony - each point represents an average of triplicate measurements).
Antifungal activities of GNP against A. flavus on PDA at different concentrations (data are shown as average values and standard deviation of diameter fungal colony - each point represents an average of triplicate measurements).
These SEM analyzes can confirm the rupture of the fungal cell membrane resulting in possible reduction of the enzymatic activity of the microorganism due to GNP presence.
Online since: March 2012
Authors: Muhammad Ahmad, Ihsan Ul Haq, Qaisar Mushtaq, Muhammad Sohaib
Due to the hundreds of bands hyperspectral imaging involves high dimensional data and provides vast amount of data about a scene.
The data is redundant due to the highly correlation between bands.
The efficiency of blindly unmixing of hyperspectral data can be seen from the achieved results.
[5]C.I Chang, Hyperspectral Data Exploitation: Theory and Applications.
[10]Information on: http://speclab.cr.usgs.gov/cuprite.html [11]Muhammad Sohaib, Ihsan-ul-Haq and Qaiser Mushtaq “Dimensional Reduction of Hyperspectral Image Data Using Band Clustering and Selection", in proceeding of Global Congress on Science and Engineering (GCSE 2011)”, Dubai, UAE.
Online since: November 2005
Authors: John J. Jonas, Stéphane Godet, Pascal J. Jacques, M. Sánchez-Araiza
The steels were rolled to reductions of 65% at 630ºC and 80% at 680ºC.
Orientation distribution functions (ODF's) were calculated from the pole figure data, to an expansion of Lmax=22 [13], using Bunge's series expansion method [14].
R-values were calculated from the texture data using the relaxed constraint method of crystal plasticity, where the critical resolved shear stress ratio for glide on the {112}<111> and {110}<111> slip systems (τ{112}/τ{110}) is 0.95.
These values were calculated from the texture data and are c) fmax = 6 fmax = 9 fmax = 8 b) f) fmax = 8 fmax = 13 fmax = 10 d) e) a) displayed as functions of sample direction in the sheet plane.
Lankford coefficients for the recrystallized samples, calculated from the texture data: a) 65% WR at 640°C, b) 65% warm rolled at 640ºC and cold reduced a further 40%.
Online since: September 2008
Authors: Robert E. Stahlbush, Kendrick X. Liu, Orest J. Glembocki, Joshua D. Caldwell, Karl D. Hobart, Marko J. Tadjer
Furthermore, the magnitude of this current-induced recovery is dependent upon the injection current, as reductions in the current cause a slower, but larger overall Vf drift recovery.
While numerous samples have been studied to date, data from two samples, D14L and D30R, with a moderate and high density of BPDs, respectively, are presented.
The solid lines represent least squares fits to the data using eq. (1).
b) Temperature dependence of sat fV∆ using data collected at 25 A/cm 2 along the various IV traces (solid squares, left axis) and sat Q (half filled circles, right axis).
This implies that while the steady-state balance between SSF expansion and contraction is changed to favor increased contraction by reducing the injection current, the reduction in current also causes a reduction in the ehp recombination rate and therefore slows the SSF movement, thereby causing the increase in the time required to reach a new steady-state sat fV∆ in the current-induced recovery experiment.
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