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上海大学学报（英文版）
上海大学学报（英文版）

戴世强

季刊

1007-6417

jpsu_l@staff.shu.edu.cn

021-66135218

200444

上海市宝山区上大路99路上海大学124信箱

上海大学学报（英文版）/Journal Journal of Shanghai University(English Edition)
查看更多>>《Journal of Shanghai University》是在钱伟长校长的大力倡导和支持下于1997年6月创刊的。本刊由上海大学出版社出版，《上海大学学报》(英文版)编委会编辑, 上海大学期刊社发行。本刊设有“Reviews”,“Articles”,“Letters”，“Abstracts of Doctoral Dissertations”等栏目，报道范围涉及自然科学与工程技术的多种领域，主要有“应用数学和力学”，“信息技术”，“机电工程与自动化”，“材料科学与工程”等领域。 本刊重视学术论文的创新性。钱校长在本刊发刊词中把科研成果分为三类：第一类用新理论新方法解决新问题；第二类用新理论新方法解决老问题或用已有理论和方法解决新问题；第三类用已有理论和方法解决老问题。本刊将优先刊登第一类学术论文，也发表一些第二类学术论文，而不采用第三类论文。本刊只刊出未在正式刊物上公开发表过的研究论文。 本刊除刊登上海大学教师和研究生的最新研究成果外，也刊登其它高校及科研院所专家学者们的优秀学术论文，而且在论文的筛选和刊出上一视同仁。本刊尤其欢迎国家自然科学基金课题和国家“八六三”项目的研究论文以及海外留学生的研究论文，也欢迎资深学者的专题综述文章, 本刊也以“Letters”的形式报道学者们的阶段性研究成果。本刊主要向国外发行，向国外近20家文献检索刊物和数据库及近百所大学图书馆按期寄送。到目前为止，本刊已被国际多家重要检索刊物或数据库收录。它们是美国的“工程索引”（EI Page One），英国的“科学文摘”（SA-INSPEC），俄罗斯的“文摘杂志”（РЖ），日本的“科学技术文献速报”（CBST），美国的“剑桥科学文摘”（CSA），美国的“数学评论”（MR），美国的“应用力学评论”（AMR），德国的“数学文摘”（ZBI），美国的“化学文摘”（CA）等的收录期刊。本刊同时被国内4家全文数据库和多家专业文摘刊物收录。欢迎国内外专家学者投稿，有关投稿的具体要求见本刊征稿简则。本刊国内外公开发行, 可通过天津联合征订服务部、北京人天书店征订，也可直接向上海大学期刊社征订。
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    Improved estimator of the continuous-time kernel estimator

    CHENG Jian-qiangSHEN HaoHE You-hua
    442-451页
    查看更多>>摘要：There have been many papers presenting kernel density estimators for a strictly stationary continuous time process observed over the time interval [O, T]. However the estimators do not satisfy the property of mean-square continuity if the process is mean-square continuous. In this paper we present a modified kernel estimator and substantiate that the modified estimator satisfies the property of mean-square continuity. At last in a simulation study the results show the modified estimator is better than the original estimator in some cases.
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    Positive temperature coefficient of resistivity effects of semiconducting (Bi1/2Na1/2) TiO3-CaTiO3-BaTiO3 ceramics sintered in air atmosphere

    MA JiZHU Xing-wenZHANG FangXU Qiong...
    452-455页
    查看更多>>摘要：Y3+-doped (Bi1/2Na1/2)TiO3-CaTiO3-BaTiO3 (BNCBT) positive temperature coefficient of resistivity (PTCR) ceramics sintered in air atmosphere were investigated in this study. (Bi1/2Na1/2) TiO3 (BNT) component can remarkably increase the onset temperature Tc of PTCR ceramics with the expensive of the resistivity R25 increase. CaTiO3 (9-27 mol%) component can decrease the resistivity, and adjust the effects of BNT phase on the Tc point. For the sample containing 3 mol% CaTiO3, the Tc raises from 122° to 153° when only 0.6 mol% BNT added, while for the ones with higher CaTiO3 content (9-27 mol%), Tc is only increased by a rate of 8-9°/1.0 mol% BNT. The effects of BNT and CaTiO3 components on Rmln (negative temperature coefficient effect) are also discussed.
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    Effects of HfO2 buffer layers on the dielectric property and leakage current of Ba0.6Sr0.4TiO3 thin films by pulsed laser deposition

    GENG YanCHENG Jin-rongYU Sheng-wenWU Wen-biao...
    456-459页
    查看更多>>摘要：Ba0.6Sr0.4TiO3 (BST) thin films with and without HfO2 buffer layer were fabricated on Pt/Ti/SiO2/Si substrates by pulsed laser deposition. Dependences of HfO2 thickness on the dielectric property and leakage current of BST thin films were focused. The dielectric constant of BST thin films increased and then decreased with the increase of HfO2 thickness, while the dielectric relaxation was gradually improved. The loss tangent and leakage current under positive bias decreased with the HfO2 thickness increasing. The leakage current analysis based on Schottky emission indicated an improvement of the BST/Pt interface with HfO2 buffer layer. The loss tangent, tunability and figure of merit of optimized HfO2 buffered BST thin film achieved 0.009 8, 21.91% (Emax = 200 kV/cm), 22.40 at 106 Hz, respectively.
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    Preparation of the polysulfonamide/titania composites

    TANG Zhi-yongXU Wen-tingJIAO Qing-hua
    460-463页
    查看更多>>摘要：A series of polysulfonamide (PSA)/TiO2 (modifier) nano-composite films were successfully prepared by in-situ polymerization at a low temperature based on 4, 4-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N, N-dimethylacetamide (DMAc). It was shown that the nano particles were well dispersed in the polymer substrate. Meanwhile, PSA/TiO2/modifier composites exhibited good UV-resistant properties and mechanical properties. In addition, the composites' heat stability improved. These prepared composites are promising in preparing spinning solution and might have potential application in heat-resistant fiber.
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    Multi-group ant colony algorithm based on simulated annealing method

    ZHU Jing-weiRUI TingLIAO MingZHANG Jin-lin...
    464-468页
    查看更多>>摘要：To overcome the default of single search tendency, the ants in the colony are divided into several sub-groups. The ants in different subgroups have different trail information and expectation coefficients. The simulated annealing method is introduced to the algorithm. Through setting the temperature changing with the iterations, after each turn of tours, the solution set obtained by the ants is taken as the candidate set. The update set is obtained by adding the solutions in the candidate set to the previous update set with the probability determined by the temperature. The solutions in the candidate set are used to update the trail information. In each turn of updating, the current best solution is also used to enhance the tail information on the current best route. The tail information is reset when the algorithm is in stagnation state. The computer experiments demonstrate that the proposed algorithm has higher stability and convergence speed.
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