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Zhou J.,Zhenjiang Vocational Technical College
Proceedings - 9th International Conference on Grid and Cloud Computing, GCC 2010

With the blast of information available on the web and the relevant documents set returned by search engineer can not meet the user's needs, the question answer system research is promoted. In this paper, we introduce the structure of Question Answer system based on SOA, define the structure of the dictionary of Keywords and searching template, the word segmentation algorithm based on the dictionary of keyword, the storage of searching template and the algorithm of template matching. On the foundation, we implement a QA system for Railway domain application, the experimental result show that QA system based on techniques we employed has high accuracy and recognition rate. © 2010 IEEE. Source

Yang L.,Jiangsu University | Yang L.,Zhenjiang Vocational Technical College
Applied Mechanics and Materials

Aiming at more and more data produced by network, it is extremely important to manage and store these data by using mass data storage platform. This paper presents a method of managing rationally and storing mass data based on distributed computing technique. It is based on Hadoop distributed platforms, mainly using the HDFS distributed file system, MapReduce parallel computing models and Hbase distributed database technology as massive data processing methods, to achieve the efficient storage. The model can overcome the existing deficiencies of the current means of storage and solve the problems of mass data in storage, which has good scalability and reliability, thus the efficiency of storage can be further improved. © (2014) Trans Tech Publications, Switzerland. Source

Chen J.,Zhenjiang Vocational Technical College | Shi P.,Zhenjiang Vocational Technical College | Guo J.,Jiangsu University of Science and Technology | Xue C.,Shandong Normal University
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

Rare earth metal Tb was employed as the catalyst to prepare GaN nanostructures. GaN nanorods were synthesized through ammoniating Ga2O3/Tb films sputtered on Si(111) substrates. Results of X-ray diffraction (XRD) and Fourier transform infrared spectrum (FTIR) indicate that the prepared nanorods are hexagonal GaN. Observations of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) show that the GaN nanorod is single-crystalline in structure with 80~200 nm in diameter and several tens of microns in length. The growth mechanism of GaN nanorods was also discussed briefly. Source

Chen J.-H.,Zhenjiang Vocational Technical College | Shi P.,Zhenjiang Vocational Technical College | Li Y.-L.,Zhenjiang Vocational Technical College | Sun X.-L.,Zhenjiang Vocational Technical College | And 2 more authors.
Rare Metals

GaN nanorods were synthesized by magnetron sputtering and ammonification system, and the thickness of Tb intermediate layer was changed to study the effect on GaN nanorods. The resultant was tested by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and photoluminescence (PL) spectra. The results show that the thickness of Tb layer has an evident effect on the modality, quality, and luminescence properties of GaN nanorods. PL spectra at room temperature show a very strong emission peak at 368 nm and a weak emission peak at 387 nm, and the intensities of the peak for the produced samples reach the maximum when Tb layer is 20 nm. Finally, the optimal thickness of 20 nm of Tb intermediate layer for synthesizing GaN nanostructures is achieved. © 2014 The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg. Source

Xu J.,Jiangsu University | Xu J.,Key Laboratory of Tribology of Jiangsu Province | Tang H.,Jiangsu University | Tang H.,Key Laboratory of Tribology of Jiangsu Province | And 3 more authors.
Chalcogenide Letters

The W-doped MoS2 nanoplates have been successfully prepared via solid-state thermal (850°C) reaction between micro-sized MoO3, WO3 and thiocarbamide powders under inert atmosphere in a closed reactor and characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM). It was found that the morphologies of the as-prepared products changed with the doping of WO3 powders. And the sizes of crystallites evidently changed while the contents of dopant increased within a certain limit (3at.%–7at.%). The tribological properties of the as-prepared products as additives in paraffin base oil were investigated by UMT-2 multispecimen tribo-tester. The topography of worn scars was obtained using a common SEM.The friction coefficient of the base oil containing W-doped MoS2 nanoplates was lower and more stable than that of MoS2 nanosheets. © 2015, National Institute R and D of Materials Physics. All rights reserved. Source

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