国家自然科学基金(11271121)

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基于神经网络的精神分裂症判别分析
《应用概率统计》2015年第3期309-319,共11页赵维 郭水霞 
国家自然科学基金(11271121);教育部新世纪优秀人才(NCET-13-0786);湖南省自然科学基金(2015JJ1010)资助
本文主要利用神经网络进行精神分裂症患者和正常人的判别分析,以63例精神分裂症患者和57例正常人的4005条功能连接作为原始特征空间,尝试用不同的降维方法,不同的神经网络模型来寻找最优分类模型.结果表明:用Mann-Whitney U检验选取病...
关键词：神经网络 分类 功能连接 精神分裂症. 
A Periodic Dividend Problem with Inconstant Barrier in Markovian Environment被引量：1
《Acta Mathematica Sinica,English Series》2015年第2期281-294,共14页Fang JIN Hui OU Xiang Qun YANG 
Supported by NSFC(Grant Nos.11171101,11271121);Doctoral Fund of Education Ministry of China(Grant No.20104306110001);Graduate Student Research Innovation Project in Hu’nan Province(Grant No.CX2013B215);the Construct Program of the Key Discipline in Hu’nan Province,Science and Technology Program of Hu’nan Province(Grant No.2014FJ3058)
Periodic dividend problem is a meaningful issue. Based on a compound binomial model with periodic dividend, we use a homogeneous, ergodic and irreducible discrete-time Markov chain to express the evolution from one pe...
关键词：Periodic dividend Markovian environment inconstant barrier ruin time discounted dividends contraction mapping principle 
Criterion of Semi-Markov Dependent Risk Model
《Acta Mathematica Sinica,English Series》2014年第7期1273-1280,共8页Xiao Yun MO Xiang Qun YANG 
Supported by National Natural Science Foundation of China(Grant Nos.11171101 and 11271121);Key Laboratory of High Performance Computing and Stochastic Information Processing(HPCSIP)(Education Ministry of China,Hu’nan Normal University),Science and Technology Program of Hu’nan Province(Grant No.2014FJ3058);Scientific Research Fund of Hu’nan Provincial Education Department(Grant No.12C0562);Leading Academic Discipline Project of Hu’nan University of Finance and Economics
A rigorous definition of semi-Markov dependent risk model is given. This model is a generalization of the Markov dependent risk model. A criterion and necessary conditions of semi- Markov dependent risk model are obta...
关键词：Semi-Markov dependent risk model Markov dependent risk model CRITERION necessarycondition Markov chain 
First principles calculation on ternary stannide phase narrow band gap semiconductor Na_2MgSn被引量：1
《Transactions of Nonferrous Metals Society of China》2014年第6期1853-1858,共6页王一夫 夏庆林 潘留仙 余燕 
Project (11271121) supported by the National Natural Science Foundation of China;Project (11JJ2002) supported by the Natural Science Foundation of Hunan Province,China;Project (11K038) supported by Key Laboratory of High Performance Computing and Stochastic Information Processing of Ministry of Education of China;Projects (2013GK3130,2014GK3090) supported by the Scientific and Techrnological Plan of Hunan Province,China
The electronic structures,chemical bonding,elastic and optical properties of the ternary stannide phase Na2MgSn were investigated by using density-fimctional theory（DFT） within generalized gradient approximation（GG...
关键词：stannide phase Na2MgSn first principles electronic structures chemical bonding elastic properties optical properties 
基于医学影像数据的大脑功能连接方法研究
《应用概率统计》2014年第2期169-180,共12页黄京 郭水霞 
国家自然科学基金(11271121);教育部新世纪优秀人才(NCET-13-0786)资助
本文采用不同的方法对比研究了精神病患者与正常人大脑功能连接网络中的显著差异.首先选用皮尔逊相关系数,偏相关系数,小波相关系数构造三种不同的大脑功能连接网络,其次运用风险差检验出具有显著差异的功能连接,最后进行比较和分析.结...
关键词：医学影像数据 大脑网络 功能连接 风险差 
First principles calculation on electronic structure,chemical bonding,elastic and optical properties of novel tungsten triboride
《Journal of Central South University》2014年第2期500-505,共6页王一夫 夏庆林 余燕 
Project(11271121)supported by the National Natural Science Foundation of China;Project(11JJ2002)supported by the Natural Science Foundation of Hunan Province,China;Project(11K038)supported by Key Laboratory of Computational and Stochastic Mathematics of Ministry of Education of China;Project(2013GK3130)supported by the Scientific and Technological Plan of Hunan Province,China
The electronic structures,chemical bonding,elastic and optical properties of the novel hP24 phase WB3 were investigated by using density-functional theory(DFT) within generalized gradient approximation(GGA).The calcul...
关键词：hP24-WB3 first principles calculation electronic structure chemical bonding elastic properties optical properties 
First principles calculation of electronic structure, chemical bonding and elastic properties of ultra-incompressible Re_2P
《Transactions of Nonferrous Metals Society of China》2013年第11期3400-3404,共5页王一夫 夏庆林 余燕 
Project(11271121)supported by the National Natural Science Foundation of China;Project(11JJ2002)supported by the Natural Science Foundation of Hunan Province,China;Project(11K038)supported by Key Laboratory of High Performance Computing and Stochastic Information Processing of Hunan Province,China;Project(2013GK3130)supported by the Scientific and Technological Plan Project of Hunan Province,China
The electronic structures, chemical bonding and elastic properties of the Co2P-type structure phase ultra-incompressible Re2P （orthorhombic phase） were investigated by density-functional theory （DFT） within genera...
关键词：Re2P first principles electronic structures chemical bonding elastic properties 
DOUBLE-MARKOV RISK MODEL
《Acta Mathematica Scientia》2013年第2期333-340,共8页莫晓云 周杰明 欧辉 杨向群 
supported by NSFC (11171101, 11271121);Doctoral Fund of Education Ministry of China (20104306110001);Scientific Research Fund of Hunan Provincial Education Department (12C0562)
Given a new Double-Markov risk model DM = （μ, Q, v, H; Y, Z） and Double-Markov risk process U = {U（t）, t 〉 0}. The ruin or survival problem is addressed. Equations which the survival probability satisfied and th...
关键词：Q process Markov chain Double-Markov risk characterization survival prob-ability recursion formula 
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