Fu X.,Suqian College
Key Engineering Materials | Year: 2017
Fine tungsten powder is prepared with blue tungsten oxide (BTO) through the hydrogen reduction. The samples were characterized with the scanning electron microscope (SEM), fisher sub-sieve sizer (FSSS) and the particulate size description analyzer (PSDA). Fine tungsten powder is easily obtained when the reduction temperature is low. With the increasement of the reduction temperature, the grain size of tungsten powder becomes coarse. The increase of the weight of BTO in the ceramic boat leads to the increasement of the thickness of its bed. Therefore, the weight of BTO in the ceramic boat ought to reduce if fine tungsten powder is prepared. Fine tungsten powder can be obtained when the hydrogen flow increases. © 2017 Trans Tech Publications.
Fu X.,Suqian College
Key Engineering Materials | Year: 2017
Anatase TiO2 particles of about 20 nm in the diameter were successfully synthesized with Ti(SO4)2 as titanium source and stronger ammonia water as precipitant at 240°C for 48 h with pH=5 using the hydrothermal method. The samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and ultraviolet-visible absorption spectroscopy (UV-VIS). XRD analysis showed that the phase of the samples was anatase TiO2. TEM analysis confirmed that TiO2 particles of about 50 nm in the diameter were obtained when the pH value was 0.12. With the increasement of the pH value, the size of as-prepared TiO2 particles became remarkably fine. However, with the further increase of the pH value, the size of TiO2 particles was not obvious. TiO2 particles of about 20 nm in the diameter were obtained when the pH value was 5. And UV-VIS results showed that the size of anatase TiO2 nanoparticles, which became small, was propitious to the blue shift of their absorption peak. © 2017 Trans Tech Publications.
Yao X.-Y.,Nanjing Southeast University |
Yang L.-J.,Suqian College
Frontiers of Physics | Year: 2017
Conical spin order, where the spin components along the conical axis form magnetization while the spiral parts induce ferroelectric polarization, possesses multiferroicity with inherent magnetoelectric coupling. A Monte Carlo simulation performed using a classical Heisenberg spinel (AB2O4) model reveals a multiple conical spin order, i.e., three modulations with different cone angles and wavelengths on A sites and two alternate B sites. The spin order not only exists as the ground state but also survives locally stably in a larger parameter region. The whole existence range can be effectively expanded by anisotropy to cover the cases of CoCr2O4 and MnCr2O4. The multiple conical spin order is well maintained and finely tuned by frustration and anisotropy over the whole existence range, and the magnetic and ferroelectric properties are influenced correspondingly. © 2017, Higher Education Press and Springer-Verlag Berlin Heidelberg.
Yang Q.-M.,Suqian College
19th International Conference on Industrial Engineering and Engineering Management: Management System Innovation | Year: 2013
As dynamic and main force of domestic market, small and medium-sized enterprises keep stimulating the development of economy. As a result, the quality and level of growth of SMEs determine the overall development of national economy. The innovation capability guarantees core competence of enterprise and is an important basis of upgrading national competitiveness. Based on the theory of collaborative innovation, this article explores establishing co-innovation of small and medium-sized enterprises, so as to bring up its innovation capability, and will contribute to a rapid and sound development of national economy. © 2013 Springer-Verlag Berlin Heidelberg.
Li X.,Suqian College |
Wang S.,Jiangsu University
Xiyou Jinshu/Chinese Journal of Rare Metals | Year: 2012
TiC-reinforced Ni 3Al composites were fabricated through thermal explosion reaction. The thermal explosion reaction process of Ti-C-3Ni-Al system and the composites were analyzed by differential scanning calorimetric(DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the reaction of titanium and carbon was ignited by the reaction of nickel and aluminum. Pure TiC/Ni 3Al products were synthesized by the thermal explosion. The reaction temperature of Ti-C-3Ni-Al system was independent of TiC contents. The system composition and thermal explosion temperature were found to have obvious influences on the morphology of the composites. With the increase of TiC contents, TiC particulates became coarser and the micro pores of the products decreased. The relative density of the products increased at first and then decreased with the rise of the thermal explosion temperature and TiC contents. The microhardness of the composite was revealed to be higher with higher TiC content.
Fan J.,Suqian College |
Wang L.G.,Jiangsu University
Applied Mechanics and Materials | Year: 2013
The conventional precision analysis method of modification and design is qualitative, laborious and time consuming. The precision of reverse parametric modification have direct influences on the quality of the reversed products. In this paper, a quantitative analysis method based on a reverse parametric approach and precision control concept is proposed. Combining with the ATOS scanner system, analyzing every aspect of the precision control and the error distribution, including data acquisition process, reverse reconstruction process and parametric process. In the process of the product reverse parametric modification, general error distribution is mainly composed of data acquisition error, reverse reconstruction error and parametric error. The method of precision control during the reverse parametric modification process is analyzed, according to this method, the total error of parametric modification for die face is 0.089mm, is lower than the accuracy requirement of 0.10mm in the reverse parametric modification process, the reverse modification of the die face of the blade based on precision control is realized. Validity and effectiveness of the method has been confirmed by case studies. © (2013) Trans Tech Publications, Switzerland.
Ma X.,Jiangsu University |
Li Q.,Suqian College |
Shen Y.,Jiangsu University
Acta Geographica Sinica | Year: 2012
Based on the SPOT satellite images of Jiangsu Province in 2007/2008, using models such as exploratory spatial data analysis and spatial metrics, the paper conducts a quantitative analysis of the space differentiation of rural settlements in Jiangsu Province, and further identifies the regional types. The results are shown as follows. In spatial distribution, the rural settlements in Jiangsu are characterized by obvious concentration with evident spatial variability, which is shown in the ladder-like sparse distribution towards the north and south in areas along the Yangtze River with high correlation in the overall distribution and geomorphic types. In the scale, the rural settlements in Jiangsu are generally in small scale with small difference in the scale of small villages and large gap in the scale of large villages which account for a small proportion. The rural settlements in Jiangsu are characterized by low concentration in size distribution, and is obviously presented in the "dumbbell" structure, namely, the rural settlements in northern and southern Jiangsu are in a large scale, and those in the central part are in a relatively small scale. In the spatial change of form and pattern, through the measurement of the pattern indices of the five transects in the northern, central and southern Jiangsu, the coastal area and areas along the Grand Canal, it was found that the form of the rural settlements in central Jiangsu is more complex than that in the northern and southern parts of the province, and the form of coastal area is more complex than that in areas along the canal. The rural settlements in southern Jiangsu and areas along the canal are characterized by good connectivity. The rural settlements in the five transects are significantly differentiated in distribution. Finally, through establishing the morphological measurement index system of the rural settlements, by adopting the method of hierarchical cluster, the rural settlements in Jiangsu are divided into eight types: Xulian hillock (low-density large-mass type), Suhuai plain (medium-density broad-band type), coastal reclamation area (high-density stripe type), polder area in central Suzhou (medium-density arc-belt type), plain south of the Yangtze River (medium-density small-mass type), lake mound land (low-density point-scattered type), Ningyi hilly region (cluster-like dispersal type), and Lixiahe area (low-density cluster-like type).
Wang X.,Suqian College
WIT Transactions on Information and Communication Technologies | Year: 2014
Identity authentication is the basis of the whole information security system, and also the bridgehead of network security. Traditionally, static password-based authentication schemes are very popular for identity authentication in remote access, but it cannot guarantee sufficient accessing security owing to its own shortcomings. In this paper, we present an improved dynamic password authentication protocol. This scheme uses a random number as challenge factors. It can support mutual authentication, resist decimal attack, and middleman attack and satisfy the security objectives such as data confidentiality, identity, and data authentication. © 2014 WIT Press.
Fu X.,Suqian College
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2015
Anatase TiO2 nanoparticles with the size of about 20 nm were synthesized using Ti(SO4)2 as titanium source and stronger ammonia water as precipitant at 240 °C for 48 h with pH=9 by a hydrothermal hydrolysis method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and ultraviolet-visible absorption spectroscopy (UV-VIS). XRD analysis shows that the phase of the sample is anatase TiO2. SEM and TEM analysis confirms that with the increase of the reaction time, the size of TiO2 nanoparticles prepared without stronger ammonia water can reach nanometer grade, but its change is not obvious. With the addition of stronger ammonia water, the size of TiO2 nanoparticles becomes small noticeabley. With the further increase of pH value, its influence on the TiO2 nanoparticles size is not obvious. And UV-VIS analysis shows that the reduction in the size of anatase TiO2 nanoparticles is beneficial to the blue shift of their absorption peak. Copyright © 2015, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.
Zhang B.,Suqian College
2010 International Conference on Computer Design and Applications, ICCDA 2010 | Year: 2010
An definition for Assistive Technology (AT) was formulated in 2001 stating "Assistive Technology (AT) is any product or service designed to enable independence for disabled or older people." This definition was adopted by the authors of the European Union (EU), ZigBee will play an important part towards the adoption of Assistive Technology by enabling wireless low-power communication between devices and services that foster safe, healthy, and, independent living conditions for the disabled or elderly. The purpose of this paper just focuses on applications of ZigBee technology for disease monitoring, personal wellness monitoring and personal fitness monitoring, which also presents the commissioning details based on three different deployment scenarios including: Service provider scenario, In-home scenario and Consumer scenario. © 2010 IEEE.