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Online since: June 2014
Authors: Fu Cheng Wan, Ning Ma, Xiang Zhen He
Introduction Users always confront with a large number of information when they search information through the internet, and always willing to find the useful information for them in very short time, but this always cannot be satisfied.
Crawl large number of web pages with internet crawler program ,and save them into text files, remove header information, the content is saved into a text file.
Fig 2 Construction of word list and reversed index Design and implementation of index processing To establish Tibetan text index, the most simple way is that text doesn't do any process, directly index on each Tibetan syllable, it is not only convenient but also very fast, regardless of whatever Tibetan text , according to this way , we can establish index, grain degrees is the single syllable, also can make double syllables, three syllables and so on.
However, if we index like that, grain degrees very small, time of establishing index will comparison more, segmentation out of syllables does not necessarily forms a keyword, therefore, This paper is on the basis of an analysis of each text in the Tibetan Word segmentation, indexing process as shown in Fig 3.
Evaluation result parsing In order to test the effect of indexing and searching, using the Tibetan text of the 45 articles classified as training corpora, corpus size is 29.9 trillion, a text index of each number separately, 153045 index, watch the indexing time, in addition to unprocessed and processed text compare, for example with this word “དཀར་ཆག”, search indexing and search time.
Online since: March 2017
Authors: Atila Drotár, Lucia Hrabčáková, Jaroslav Duška, Alicia Mašlejová, Peter Kalmár
Material cleanliness, grain size and linearity met the requirements of specification for material MW 01.
Introduction Car sheet wheels are manufactured as welded pieces where the transversely welded wheel rim forms a circumferential part and a disk part with assembly holes welded to it; the number of assembly holes depends on the motor vehicle type.
Material cleanliness, grain size and microstructure lamination met the requirements of the given material grade specification.
Online since: May 2006
Authors: Jean R. Gavarri, Sylvie Villain, S. Saitzek
In fact, the final grain sizes result from a compromise between low temperature heating (limiting crystal growth) and elimination of CO2 and H2O generated by the thermal decomposition.
Grain sizes were estimated as ranging between 5 and 8 nm for ceria phase; two copper oxide phases (CuO and Cu2O) were observed for high copper fractions (>20%), and their grain sizes increased as copper fraction increased in the composite system.
It can be recalled that grain sizes depend on thermal process but also on fractions of initial precursors.
This might be interpreted in terms of formation of nanoparticles of copper phases at grain boundaries and grain ceria surface.
At sufficiently high temperature (T>200°C), the electrolyte should be formed by oxygen species adsorbed at the grain surfaces (noted O* for one of the possible forms O2 , (O2) … ).
Online since: February 2008
Authors: Wing Yiu Yeung, Richard Wuhrer, Greg Heness, J. Qin, W. Lu, D. Zhang, Jonathon Mak
The number of particles in each quadrat cell, Nq, was counted.
The Poisson Distribution, P(Nq) (Eq. 1) [11] and the Skew Factor, β (Eq. 2) [11], were determined, where q is the number of quadrats, Nqi is the number of particles in the ith quadrat, Nqmean is the average number of particles per quadrat and σ is the standard deviation of the quadrat distribution, as defined in the equations 1 and 2. ) exp( !
Primary α grains (dark), acicular α phase (needle-like) and β phase are evident in the microstructures (Fig. 1 (a)).
Primary α grains, acicular α phase and β phase were observed to develop in the microstructures.
Online since: August 2013
Authors: Jun Wang, Li Ling, Ren Jun Cheng, Chang Liang Xu, Shou Yi Yin, Chang Fu Qiao
This paper researches the data distribution protocol Dissemination based on TinyOS, goes deep into the principle and mechanism of Dissemination, and applies it to the monitoring system of the grain reserves, enabling administrators to manage the wireless sensor network remotely via wireless.
MAX-Nodes relationships Beside, we do other simulations.First, we compare the number of broadcast packets of DFSN with the original, as depicted in Fig.3.
This reduces the number of the transmission of a broadcast packet in the network, thereby reduces the energy consumption caused by the code distribution.
Compare the number of broadcast packets Fig.4.
On this basis, the dissemination protocol is used in temperature monitoring system of grain reserves in Jiangxi, and it turns out to be stable and reliable.
Online since: June 2003
Authors: Sigurd Wagner, Ming Wu, James C. Sturm
Koster [20] suggested that the grain size starts increasing around 850°C, but Hatalis [26] used rapid thermal annealing to find that the smallest grains are obtained at ~1100°C.
Transmission electron microscopy (TEM) is used to check the crystallinity and grain size of the polysilicon film.
The average grain size of is ~0.5 µm. 0.5 µm Figure 3.
This difference suggests that the grain size of the 950°C polysilicon is less than 2 µm, but the 750°C polysilicon film has a grain size of a few micrometers.
Excess metallic contamination (Fe, Cr) from steel would likely cause many midgap states and thus a large number of generation centers.
Online since: August 2013
Authors: Jian Guo Zheng, Zhi Yuan Li, Rong Di Liu
In the mixture of fine particles and coarse particles, there are cohesion force of the fine-grained soil and the friction strength between the coarse particles’s mutual interlocking.
For coarse-grained soil, coarse content is the main factor to determine the shear strength, namely the particle size distribution is the main factor to determine the shear strength.
From Table 2 it can be seen that the values of c,increase with the increasing of coarse grained content and decrease when the roughness of the concrete interface is reduced.
The longitudinal coordinate "0" is absolute zero, "1-5" from top to down is the sequence number of the stacked rings, and "6" is the concrete base.
The study of the shear stress-displacement relationship and the shear strength of the interface provides: the values of c,increase with the increasing of coarse grained content and decrease when the roughness of the concrete interface is reduced.
Online since: August 2016
Authors: Marek Vrabeľ, Martin Eckstein, Ildikó Maňková
It is assumed that the reason for this is the abrasive effect of intermetallic phases and carbides, located mainly at the grain boundaries of the workpiece structure [7].
Liao and Shiue [8] came to a conclusion that in turning of Inconel 718 with carbide tools, the tool wear during high speed turning condition (vc = 35 m/min) was caused by diffusion of elements (Ni or Fe) in workpiece into tool’s binder (Co) by a grain boundary diffusion mechanism.
Employed cutting tools - spiral drill and face cutting finisher - were ground from solid carbide class HF according to ISO 513, a fine grain substrate, grain size < 1µm.
Afterwards, for a certain number of holes a very moderate and uniform increase of tool wear occurs until VBmax rises towards 60 μm.
Initially, surface roughness decreases with increasing number of holes representing an increasing cutting length.
Online since: September 2015
Authors: S.L. Soo, A. Barnacle, D.K. Aspinwall, Nor Hafiez Mohamad Nor, J.B. Saedon
No discernible deformation of the material grain structure beneath the machined surface was observed.
A further assessment at higher magnification (3000x) of Slot 26 in highest parameters (cutting speed 50m/min, feed per tooth 2μm/flute and depth of cut 55μm) at 2 different positions (see Figure 6 and Figure 7) also revealed no discernible deformation of the material grain structure beneath the machined surface.
Furthermore no discernible deformation of the material grain structure beneath the machined surface was observed, which was attributed to the low cutting forces and temperatures generated.
Paper Number: IQ71-240, Society of Manufacturing Engineers, 1971
Online since: October 2010
Authors: Chin Chun Chang, Chang Pin Chou, Ji Gang Yang, Ling Qi
Taguchi method is based on orthogonal arrays and analysis of variance (ANOVA) to minimize the number of experiments and to effectively improve product quality [16-17].
A number of measurements for hardness and electrical conductivity were taken and the average was determined.
Mainly on the grain boundary of the precipitate free zone, PFZ of the solute diffuses to the grain boundary and further interfuses with grain boundary precipitation.
The current study draws the following conclusions based on the experimental results: The Taguchi method efficiently obtains optimal heat treatment parameters for the 7050 aluminum alloy, minimizes the number of experiments, and analyzes the influence of each heat treatment parameter on the experiment results and the contributions of individual parameters.
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