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Online since: September 2016
Authors: V.A. Nekit, Nikolay N. Ogarkov, Sergey I. Platov
In world practice for the cooling of metal after hot rolling it is applied the cooling lines with different number and length of sections [18 – 19].
For the continuous light-section wire mill 290 has been the analysis of thermal processes in the cooling line, consisting of the various numbers of sections: three, five and seven.
The length and number of active sections were selected to ensure the same final temperature 750°С{TTP}1057 (Fig. 3).
This problem is solved by increasing the number of shorter sections of water cooling.
The kinetics of ferrite nucleation at austenite grain boundaries in Fe-C alloys. // Metallurgical transactions. 19A (1988) 427-440
Online since: January 2005
Authors: Kazuhiko Ohmori, Tomonori Umeda, Takuya Sakaguchi, Masaaki Doi, Pan Huayong, Hidefumi Asano, Nobuo Tanaka, Masaaki Matsui
A great number of studies on the conditions for the appearance of ferromagnetism in the fine particle have so far received much attention as the fundamental investigation applicable to the design of new materials having high-density magnetic memories.
On the other hand, Zeng et al.[5] reported that the FePt nanoparticle assemblies indicated exchange coupling resultant from the reduction of interparticle distances at annealing temperatures more than 600℃ and there is no evidence of carbon residue presented at grain * Present address: Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan boundaries of the coalesced particles by annealing.
(b)Histogram shows a distribution of particle diameters. d:average diameter, σ:standard deviation. 0 5 10 15 20 0 20 40 60 (b)(b)(b)(b) d=5.6nmd=5.6nmd=5.6nmd=5.6nm σ=±1.3nmσ=±1.3nmσ=±1.3nmσ=±1.3nm Number of particles Number of particles Number of particles Number of particles Diameter (nm) Diameter (nm) Diameter (nm) Diameter (nm) (a) (a) Fig.1 (a)TEM micrograph of FePt nanoparticles as prepared.
(b)Histogram shows a distribution of particle diameters. d:average diameter, σ:standard deviation. 0 5 10 15 20 0 20 40 60 (b)(b)(b)(b) d=3.6nmd=3.6nmd=3.6nmd=3.6nm σ=0.62nmσ=0.62nmσ=0.62nmσ=0.62nm Number of particles Number of particles Number of particles Number of particles Diameter(nm) Diameter(nm) Diameter(nm) Diameter(nm) (a) As shown in Fig.3 (a),(b), observed peaks in the X-ray diffraction patterns of the as- synthesized samples and the one annealed at 350 ℃ exhibited the disordered fcc structure.
Online since: June 2013
Authors: Wei Hua Li, Hua Sheng Chen, Yong Qi
When set I increase the total failed nodes number may increase.
Table 1 is the sampling data per 100 numbers of tests.
Our work is based on the tree node number is a constant, it can extend to situation that node number is a variable.
Acknowledgements This work is supported by China Ministries and commissions project (project number 513150703 and 9140A06040111HK03).
A Fine-grained Parameter Configuration Model for Failure Detection in Overlay Network Systems
Online since: January 2012
Authors: Hemalatha Elango, Karthiyayini Nagarajan
In general, there are a number of key criteria to determine the success of the indoor TMD secure system: • Convenience — the technology on which a patient monitoring system depends should be in use today and readily available on the market.
As the numbers in the plain text are between 0 and 256 we have bits in every number.
As the numbers in the first stage of the cipher text are between 0 and 256 we have bits in every number.
Sudha and Prasad Reddy P.V.G.D., “Data Encryption Technique Using Random Number Generator”, Granular Computing, 2007.
Applications of Fibonacci numbers”, 7, kluwer Academic publishers;(1998),pp.393-99
Online since: July 2015
Authors: Ting Luo, Xing Yong Gu, Xiao Qing Wen
The mineral composition and granule feature of Tengri yellow sand as well as the micro-structure and infrared property of the fired body were discussed by the means of various testing such as the grain fineness distribution analysis, the XRD diffraction analysis, the SEM scanning electron microscope analysis, the coefficient of thermal expansion measure and the infrared performance detection.
The formulas marked I, II, III, IV, V mixed large number of the yellow sand ranged from 75wt% to 90wt% with ALPAS clay, ErDaoChuan red clay and yellow mud form the brickyard were prepared in this study.
Online since: January 2014
Authors: Shang Feng Du, Gang Xu, Jie Kan, Rui Rui Zhang, Li Ping Chen
Wireless sensor network technology has the potential to reveal fine-grained, dynamic changes in monitored variables of outdoor landscape.
Especially as the development of modern agriculture, microclimate information requires more fine-grained, more precise, and more real-time.[1] The on-going technological developments in the miniaturization of electronic devices and wireless communication technology have led to emergence of wireless sensor networks (WSN) which make it is possible to acquire microclimate information more timely, accurately and conveniently.
The total sample number is about 3000 and the sampling cycle is 4 hours.
Online since: March 2012
Authors: Tian Yang Zhai, Zhu Ding
The results show that, with the increase of the permeability of cement slurry net of intensity decreased by 13%; The increase of pore volume total 11%, and the average pore volume rose 5%, cause pore internal loose, strength fell 0.74%; Cement of a few aperture increase to 7 nm, can lead to internal form lots of pore channels, intensity decreased. when the most several aperture is more than 10 nm, cement strength average less than 41.4 Mpa; Age can effectively passivation cement phase crystallization geometrical shape, and effective crystallization refined grain size.
The conclusions show that the formation of the cement internal pore channels and intensity have close relations, and a large number of channels will further reduce formed the strength, when the most several aperture is more than 10 nm, cement strength average less than 41.4 Mpa.
Online since: July 2024
Authors: Yong Dan Hou, Parpah Senanu Kwawukume, Derrick Boateng Asante, Lemuel Gbologah
The names corresponding to the clay numbers in Fig. 1 are displayed in Table 1.
Consequently, clay number 39, Tetegbu clay, located in the Greater-Accra Region, meets the essential requirement perfectly.
The clays that meet the criteria for flux but with slightly lower alumina content are numbers 3 (Afransi) and 43 (Anfoega Kaolin), located in the Volta region.
In similar research, excessive zirconia doping was found to aggregate and inhibit grain boundary movement needed for mullitisation [40].
With its bigger grain size compared to clay minerals, uniform distribution of grogs can also stop the propagation of crack tips.
Online since: September 2011
Authors: Michal Krzyzanowski
This procedure allows for consideration of the fine morphological features of the scale and the scale/metal interface while, at the same time, reducing the number of elements under consideration.
Assuming potential inclusion of the grain structure of the oxide scale, lubrication, generation of abrasive particles into the system, mechanical intermixing at the sub-surface layers, etc., application of traditional finite element techniques for modelling of these micro- events all at the same time becomes impossible.
Tangential viscous sliding of the oxide scale on the metal surface is allowed, arising from the shear stress transmitted from the specimen to the scale in an analogous manner to grain-boundary sliding in high-temperature creep.
Determination of the crack length is based on increment number and deactivation of the separation forces based on the crack length and J-integral value.
Online since: March 2012
Authors: Hua Qing Lai
Introduction The rapid development of die casting production for the automotive, motorcycle large number of parts and components to provide an economical and efficient production methods.
With the number of cycles increases, the crack tip near the small hole and gradually formed micro-cracks, and began to merge to form the main crack, the crack continues to expand, and finally the formation of cracks between the interconnected network of cracks caused by mold-like failure.
Thus reducing the temperature cycle amplitude, increased material strength and toughness of die-casting mold to form the surface compressive stress, may postpone or delay the thermal fatigue crack formation and expansion, from the microscopic analysis, thermal fatigue cracks in the grain boundary carbides often, the initiation of clusters of inclusions Therefore steel clean, uniform microstructure of high-quality hot work die steel with high thermal fatigue resistance.
Methods to improve the life of die-casting mold Casting design.asting over the internal organization of thick coarse grains, the formation of pores, shrinkage, oxidation, internal cracks, and is accompanied by stress generation sources, so its strength and durability performance may be lower than secondary structure formation stiffener products.
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