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Online since: January 2010
Authors: Henryk Dyja, Marcin Knapiński, Anna Kawałek
From data given in fig.1-2 it follows that shape and bend radius value of the strip after leaving the deformation zone is influenced by initial height of the rolled strip h0, rolling reduction ε and velocity asymmetry factor av.
From data given in fig.2 follows that for reductions more than 30% a distinct influence of asymmetry velocity of roll periphery av on the direction of strip blend after leaving the deformation zone takes place.
The effect of the velocity asymmetry factor, av, and the initial stock height, h0, on the strip curvature, for a rolling reduction of ε = 30% The curve lines given in fig.4 for reduction of 30% are of different character.
Distribution of strain intensity εi for a strip of h0 = 14 mm, rolled asymmetrically with a rolling reduction of 30% and varied asymmetry factors: a) av = 5%, b) av = 8%, c) av = 15% From data given in fig. 5-7 follows that as a result of asymmetric rolling process in deformation zone there occurs an unequal velocity field of material flow.
The impact of individual rolls on the strip is also different as well as reduction of each roll is different.
Online since: June 2012
Authors: Ming Rui Xin, Zhan Guo Cui, Lian Xiang Jiang
High integration of electronic using hybrids and ASICs allowed to reduce the number of units needed to implement all the data handling, power distribution and attitude control electronics. 3) Uniform data flow design including satellite platform data and payload data.
Uniform data flow make the information transferring and information sharing convenient. 4) Enhance the processing ability for payload data and independent management ability. 5) Upgrade the information security management ability.
The equipment is composed of several modular modules with the same inner interface using inner data bus.
Firstly, we write data to RAM to verify the writing function and then read out the data from RAM to check the reading function, the writing data and reading data is compared to make sure the correctness of RAM.
ROM and EEPROM stores important software data so that they aren’t allowed to erase or reprogram entirely.
Online since: July 2006
Authors: Magnus Johansson, Birger Karlsson, Magnus Hörnqvist
The area reduction at fracture was higher in 6063 than 7030, although the uniform elongation was larger in 7030. 6063 showed almost no strain rate dependence of the ductility and a limited reduction with increased temperature. 7030 showed markedly increasing area reduction with increasing temperature and decreasing values with increasing strain rate.
(a) (b) Figure 3: Area reduction at fracture as a function of (a) strain rate and (b) temperature.
The ductility as a function of temperature and strain rate was measured in terms of area reduction at fracture 0 0 A AA RA f− = , (2) where A0 is the original cross-sectional area and Af is the area after fracture.
On the other hand, fig. 1 shows a much higher uniform elongation for 7030, contradictory to the RA data.
The area reduction at fracture is higher in 6063 than in 7030, although the uniform elongation is larger in 7030. 6063 shows almost no strain rate dependence of the ductility and a limited reduction with increased temperature. 7030 shows markedly increasing area reduction with increasing temperature and decreasing values with increasing strain rate. 4.
Online since: September 2007
Authors: Yong Xiang Zhao, Zhong Yan Zhai, Ming Fei Feng
It indicates that the fatigue design by analysis for the piping should be based appropriately on the welded joint data.
The curves were constructed with reduction factors (RFs) of 20 on cycles and 2 on stress to the best-fit curve of test data.
After tests, test radial εa-N data were also converted into axial εa-N data by Eq. (1).
And then, the axial εa-N data were further delivered as cyclic Sa-N data by Langer's definition Sa=εa⋅E' (2) Probabilistic Modeling Random Cyclic Constitutions.
Typical probabilistic curves at C=50% are given in Fig. 7.The scattered test data has been well modelled.
Online since: October 2013
Authors: Jian Feng Li, Xiang Li Zhao, Li Xin Gao
According to internal sensor of blast furnace low life and high maintenance costs, proposed an indirect diagnostic method that can take advantage of the upper gearbox vibration sensors to collect data to analyze the lower gear box failure.
Analysis of the data collected by the vibration monitoring system measuring pointA2, the time-domain waveform is shown in Fig. 2.
Carry out the wavelet noise reduction processing for the original signal.
To electe the best results of the noise reduction effect, signal-to-noise ratio as the main criteria, take the largest group of the signal-to-noise ratio as the final noise reduction results.
Conclusion Diagnosis of low speed and heavy equipment, in particular the fault diagnosis of vibration signal of the blast furnace gearbox, low-speed parts of the lower drive chain failure will cause the superior drive train high-speed parts transmission instability, the data collected in the upper gearbox high-speed part of the measuring point will arise in fault characteristic frequency of the low-speed parts.
Online since: May 2012
Authors: Claudiu Nicolicescu, Iulian Ştefan, Mario Trotea, Olimpia Ghermec, Sorin Vasile Savu
After using the microwave heating process it was observed a significant reduction of temperature-time parameters to BHFM formation for mechanically alloyed mixtures compared to homogeneous mixture.
These advantages include unique microstructure and properties, improved product yield, energy savings, reduction in manufacturing cost and synthesis of new materials [1].
The suitable graph for the stoichiometric mixtures of BaOx6α-Fe2O3 formed by mechanical alloying compared with the homogeneous mixture was drawn in figure 2 based on the data presented in table 3, where the maximum values of particle size ranges appear.
Fig. 2 Maximum particle size for mixtures of BaCO3 and 6α-Fe2O3 powders It can be seen in the resulting data from particle size analysis that starting from a granulation of 1,5 μm for stoichiometric homogeneous mixture of BaOx6α-Fe2O3, has reached to 0,74 μm for mechanically alloyed mixture 5 hours and the last mechanically alloyed mixture for 20 hours show a significant reduction of particle size located around 96 nm.
Sample Heating temperature [oC] Heating time [τ min] 1 HM 1050 ≈15 2 MA5h 950 3 MA20h 900 The choice of the presintering temperatures was done taking into account that according to data from literature, the volumetric microwave heating efficiency is to reduce considerably the presintering temperature by over 300oC and presintering time by over 80 %.
Online since: October 2011
Authors: Ya Fen Han
Research on the Potential of Resource Saving and Emission Reducing of Papermaking Industry in China: Based on Environment Learning Curve Yafen Han College of Earth Sciences and Engineering, Su Zhou University, Anhui Province, China, 234000 Email: hanyafen2008@163.com Keywords: Papermaking industry; Environmental load; Environmental learning curve Abstract: This paper uses sectional data to analyse the structure of papermaking industry and its environmental influence.
In the other hand, this paper uses statistical data in 1992-2010, and takes the energy and water consumption, waste gas, SO2, mist and dust, waste water, COD, the solid waste discharge per 104 RMB Yuan as indexes.
Organization of the Text 1 Data Source and Research Method 1.1 Data source Based on data from China energy statistics Yearbook and China Statistical Yearbook, this paper collect the relevant data from 1992 to 2010 of resources consumption and environmental pollution in detail, and select nine indices, which include energy consumption, water consumption, SO2 discharge, COD discharge, waste water,waste gas, the solid waste discharge, mist and dust per 104 RMB Yuan, to reflect the influence of economic development on resource-environment system.
, cost reduction, enhancement production efficiency through the producer improves technique of production and operating procedure unceasingly by study and experience's accumulation[6].
Revelation from the best available technology to energy saving and discharge reduction in China paper industry[J].
Online since: November 2023
Authors: Fulvio Siciliano
., 323 NY 355, Poestenkill, NY, 12140, USA fulvio@gleeble.com Keywords: steel processing, physical simulation, hot rolling, continuous annealing Abstract: Physical simulation is a well-known tool for cloning industrial rolling conditions and generating large quantities of useful data.
Torsion simulation produces torque and angle data which are converted to stress and strain [2,4].
It can be noted that the torsion simulation showed differences of less that 10% when compared to the MFS calculated from rolling mill data.
Pass Mill MFS (MPa) Torsion MFS (MPa) Difference (%) 1 123 113 8 2 161 150 7 3 138 147 -7 4 163 163 0 Such data are of great importance when setting up the mill parameters prior to first rolling as well as to fine-tune on-going hot rolling schedules.
(a) reference (b) reduced temperature and (c) large reductions per pass.
Online since: March 2015
Authors: Jun Wei Li, Jing Li, Zhi Nan Jiang
The existing research data shows that diseases of roadbed in permafrost and seasonally frozen ground areas is mainly caused by frost heaving and thaw collapse.
The final result was determined by the average of the datum from 3 parallel tests.
In a word, the reduction of the resilient modulus was realized conformably.
The curve of shear strength with freezing and thawing cycle Above datum indicated the reduction of cohesion from 118.49KPa to 38.02Kpa after 6cycles, while the slight increase of internal friction angle from original 27.1°to the final 39.8°for the roadbed fillings in Songbei region.
Comprehensively, the reduction of shear strength could be obtained with the numbers of freezing and thawing cycle.
Online since: January 2024
Authors: Azeddine Fantasse, Lakhal El Khadir, Ali Idlimam, El Houssayne Bougayr
All these measured parameters are recorded at 5-minute intervals using a CR5000 type data acquisition system (Campbell Scientific France).
Figure 4 shows the solar irradiation data at the greenhouse.
Volume reduction of the three sludge samples in winter (a) and summer (b).
The data in Figure 8 shows a significant reduction in the volume of sludge samples due to water evaporation during greenhouse treatment in both the winter and summer seasons.
In winter, the dried sludge samples showed a volume reduction of at least 55%.
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