Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: July 2011
Authors: Hong Xin Shi, Xin Zhang, Ran Feng Qiu, Yi Min Tu, Ke Ke Zhang
In the past few yeas, a number of studies have been conducted to evaluate the feasibility of friction stir welding of magnesium alloys.
However, overlarge heat input would result in grains coarsening, which cause that the strength of joint decline.
However, overlarge heat input would result in grains coarsening, which cause that the strength of joint decline.
Online since: July 2005
Authors: Kenji Higashi, Tokuteru Uesugi
Ab initio calculation
Ab initio calculations (i.e. first principles
calculations) require as input only the
positions and atomic numbers of each atom.
Figure 2 Examples of ab initio calculations; a vacancy [2], grain boundary [6], alloy [7], adsorption [8], interface [9], fullerene [11], and superconductor [12].
Figure 2 Examples of ab initio calculations; a vacancy [2], grain boundary [6], alloy [7], adsorption [8], interface [9], fullerene [11], and superconductor [12].
Online since: November 2014
Authors: Shuang Wang
The bilingual corpora have been applied to mine fine-grained translation equivalents, such as bilingual terminologies, named entities and bilingual lexicography, to support statistical machine translation and cross-language information retrieval.
To solve the problem of heterogeneous web structure with mining parallel corpora from web, this thesis develops tag structure alignment calculated in accordance with the improved edit distance and the similarity of co-occurrence number sequence calculated in accordance with maximal common subsequences as the new heuristics.
To solve the problem of heterogeneous web structure with mining parallel corpora from web, this thesis develops tag structure alignment calculated in accordance with the improved edit distance and the similarity of co-occurrence number sequence calculated in accordance with maximal common subsequences as the new heuristics.
Online since: December 2014
Authors: Jefferson Fabrício Cardoso Lins, Claudinei dos Santos, Alexandre Fernandes Habibe, Durval Rodrigues, José C. Minatti, Luis Alberto dos Santos
The increase in free energy of the crystalline phase by introducing defects such as random chemical disorder or the increase of grain boundary area leading to the formation of a nanocrystalline structure, are considered responsible for amorphization during MM.
The high-energy milling is a complex process and involves the optimization of a number of variables to achieve phase and / or the desired microstructure of the product.
The high-energy milling is a complex process and involves the optimization of a number of variables to achieve phase and / or the desired microstructure of the product.
Online since: July 2014
Authors: Jun Wang, Zheng Xia Zhang, Si Qiu Xu, Er Ning Zhou, Xiao Lin Huang
In this paper, the complexity analysis method based on Jensen-Shannon Divergence was used to calculate the complexity of the idle states, the close eyes states and the count numbers states electroencephalogram.
The principle For time series x whose length is N, {x(i):1iN}, given time scale factorτ, the original time series x coarse graining [18] according to the following ways: (1jN/τ) (1) We denoted p1、p2 as two probability distribution of discrete random variables X while (1) stands for the KULLBACK direct difference I
The principle For time series x whose length is N, {x(i):1iN}, given time scale factorτ, the original time series x coarse graining [18] according to the following ways: (1jN/τ) (1) We denoted p1、p2 as two probability distribution of discrete random variables X while (1) stands for the KULLBACK direct difference I
Online since: January 2016
Authors: Wichian Siriprom, Kanyakorn Teanchai, Chanunthorn Chananonnawathorn, Mati Horprathum, Wissawat Sakulsaknimitr, Viyapol Patthanasettakul, Worasitti Sriboon
Annealing up to 300°C, the films become smooth with annealing indicate reduction in the number of defects with annealing [5].
It was found that the average optical transmission in the visible light region improves with annealing treatment, exhibiting 68% for as-deposited ITO thin film and 71% after annealingat 200 and 300 °C.The improvement of optical properties caused by increasing annealing and reduced of defects near the grain boundaries, thus resulting in the improvement of structural homogeneity and the decrease of light reflection [5-6].
It was found that the average optical transmission in the visible light region improves with annealing treatment, exhibiting 68% for as-deposited ITO thin film and 71% after annealingat 200 and 300 °C.The improvement of optical properties caused by increasing annealing and reduced of defects near the grain boundaries, thus resulting in the improvement of structural homogeneity and the decrease of light reflection [5-6].
Online since: February 2012
Authors: Lin Lin Yang, Yong Gang Wang, Yu Jiang Wang
From Fig.2(a), it can be clearly be observed that the powders obtained at 200oC with 6M NaOH consist of homogeneous and nearly spherical grains with the particle sizes about 200-300nm.
Therefore, the nuclear barrier was increased greatly, and the number of crystal nucleus was decreased obviously.
Therefore, the nuclear barrier was increased greatly, and the number of crystal nucleus was decreased obviously.
Online since: February 2016
Authors: Hana Šimonová, Lubos Pazdera, Libor Topolář
Micro cracks generate a large number of events of a small amplitude while macro cracks generate fewer events but of a larger amplitude.
Experimental Setup The investigated material based on alkali-activated slag (AAS) was consisted of 450 g of fine grained granulated blast furnace slag Štramberk 380 (specific surface area 380 m2·kg-1), 180 g of sodium silicate (water glass) with modulus 1.6, 1350 g of silica sand and 95 ml of water.
Experimental Setup The investigated material based on alkali-activated slag (AAS) was consisted of 450 g of fine grained granulated blast furnace slag Štramberk 380 (specific surface area 380 m2·kg-1), 180 g of sodium silicate (water glass) with modulus 1.6, 1350 g of silica sand and 95 ml of water.
Online since: November 2007
Authors: Masaru Ueno, Hironobu Oonishi, Sok Chol Kim, Hiroyuki Oonishi Jr., Hirotsugu Ohashi, Mikio Iwamoto, Masayuki Kyomoto
A hollow on the
alumina ceramic surface was a grain boundary with a rich glass compound, which probably
occurred due to etching with a body fluid during the clinical use.
A large number of scratches formed during clinical use were observed only on the retrieved Co-Cr alloy femoral components.
A large number of scratches formed during clinical use were observed only on the retrieved Co-Cr alloy femoral components.